diff --git a/dist/index.html b/dist/index.html
index 73387cd..fd171bc 100644
--- a/dist/index.html
+++ b/dist/index.html
@@ -2,6 +2,7 @@
 <html>
   <head>
     <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
     <title>CCCamp19 map of milliways</title>
     <link rel="stylesheet" href="./main.css" type="text/css">
     <style>
diff --git a/dist/main.css b/dist/main.css
index eb2cca6..027badb 100644
--- a/dist/main.css
+++ b/dist/main.css
@@ -384,5 +384,45 @@ html, body {
   bottom: 0;
   width: 100%; }
 
+.hidden {
+  display: none; }
+
+.ol-messure {
+  right: .25em;
+  top: 10em;
+  font-size: 1.5em; }
+
+.tooltip {
+  position: relative;
+  background: rgba(0, 0, 0, 0.5);
+  border-radius: 4px;
+  color: white;
+  padding: 4px 8px;
+  opacity: 0.7;
+  white-space: nowrap; }
+
+.tooltip-measure {
+  opacity: 1;
+  font-weight: bold; }
+
+.tooltip-static {
+  background-color: #ffcc33;
+  color: black;
+  border: 1px solid white; }
+
+.tooltip-measure:before,
+.tooltip-static:before {
+  border-top: 6px solid rgba(0, 0, 0, 0.5);
+  border-right: 6px solid transparent;
+  border-left: 6px solid transparent;
+  content: "";
+  position: absolute;
+  bottom: -6px;
+  margin-left: -7px;
+  left: 50%; }
+
+.tooltip-static:before {
+  border-top-color: #ffcc33; }
+
 
 /*# sourceMappingURL=main.css.map*/
\ No newline at end of file
diff --git a/dist/main.css.map b/dist/main.css.map
index 231b34b..8fd317c 100644
--- a/dist/main.css.map
+++ b/dist/main.css.map
@@ -1 +1 @@
-{"version":3,"sources":["webpack:///./node_modules/ol/ol.css","webpack:///./node_modules/ol-layerswitcher/src/ol-layerswitcher.css","webpack:///./src/app.scss"],"names":[],"mappings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eAAe;;AAEf;AACA;AACA;AACA;AACA,cAAc","file":"main.css","sourcesContent":[".ol-box {\n  box-sizing: border-box;\n  border-radius: 2px;\n  border: 2px solid blue;\n}\n\n.ol-mouse-position {\n  top: 8px;\n  right: 8px;\n  position: absolute;\n}\n\n.ol-scale-line {\n  background: rgba(0,60,136,0.3);\n  border-radius: 4px;\n  bottom: 8px;\n  left: 8px;\n  padding: 2px;\n  position: absolute;\n}\n.ol-scale-line-inner {\n  border: 1px solid #eee;\n  border-top: none;\n  color: #eee;\n  font-size: 10px;\n  text-align: center;\n  margin: 1px;\n  will-change: contents, width;\n}\n.ol-overlay-container {\n  will-change: left,right,top,bottom;\n}\n\n.ol-unsupported {\n  display: none;\n}\n.ol-viewport, .ol-unselectable {\n  -webkit-touch-callout: none;\n  -webkit-user-select: none;\n  -moz-user-select: none;\n  -ms-user-select: none;\n  user-select: none;\n  -webkit-tap-highlight-color: rgba(0,0,0,0);\n}\n.ol-selectable {\n  -webkit-touch-callout: default;\n  -webkit-user-select: text;\n  -moz-user-select: text;\n  -ms-user-select: text;\n  user-select: text;\n}\n.ol-grabbing {\n  cursor: -webkit-grabbing;\n  cursor: -moz-grabbing;\n  cursor: grabbing;\n}\n.ol-grab {\n  cursor: move;\n  cursor: -webkit-grab;\n  cursor: -moz-grab;\n  cursor: grab;\n}\n.ol-control {\n  position: absolute;\n  background-color: rgba(255,255,255,0.4);\n  border-radius: 4px;\n  padding: 2px;\n}\n.ol-control:hover {\n  background-color: rgba(255,255,255,0.6);\n}\n.ol-zoom {\n  top: .5em;\n  left: .5em;\n}\n.ol-rotate {\n  top: .5em;\n  right: .5em;\n  transition: opacity .25s linear, visibility 0s linear;\n}\n.ol-rotate.ol-hidden {\n  opacity: 0;\n  visibility: hidden;\n  transition: opacity .25s linear, visibility 0s linear .25s;\n}\n.ol-zoom-extent {\n  top: 4.643em;\n  left: .5em;\n}\n.ol-full-screen {\n  right: .5em;\n  top: .5em;\n}\n@media print {\n  .ol-control {\n    display: none;\n  }\n}\n\n.ol-control button {\n  display: block;\n  margin: 1px;\n  padding: 0;\n  color: white;\n  font-size: 1.14em;\n  font-weight: bold;\n  text-decoration: none;\n  text-align: center;\n  height: 1.375em;\n  width: 1.375em;\n  line-height: .4em;\n  background-color: rgba(0,60,136,0.5);\n  border: none;\n  border-radius: 2px;\n}\n.ol-control button::-moz-focus-inner {\n  border: none;\n  padding: 0;\n}\n.ol-zoom-extent button {\n  line-height: 1.4em;\n}\n.ol-compass {\n  display: block;\n  font-weight: normal;\n  font-size: 1.2em;\n  will-change: transform;\n}\n.ol-touch .ol-control button {\n  font-size: 1.5em;\n}\n.ol-touch .ol-zoom-extent {\n  top: 5.5em;\n}\n.ol-control button:hover,\n.ol-control button:focus {\n  text-decoration: none;\n  background-color: rgba(0,60,136,0.7);\n}\n.ol-zoom .ol-zoom-in {\n  border-radius: 2px 2px 0 0;\n}\n.ol-zoom .ol-zoom-out {\n  border-radius: 0 0 2px 2px;\n}\n\n\n.ol-attribution {\n  text-align: right;\n  bottom: .5em;\n  right: .5em;\n  max-width: calc(100% - 1.3em);\n}\n\n.ol-attribution ul {\n  margin: 0;\n  padding: 0 .5em;\n  font-size: .7rem;\n  line-height: 1.375em;\n  color: #000;\n  text-shadow: 0 0 2px #fff;\n}\n.ol-attribution li {\n  display: inline;\n  list-style: none;\n  line-height: inherit;\n}\n.ol-attribution li:not(:last-child):after {\n  content: \" \";\n}\n.ol-attribution img {\n  max-height: 2em;\n  max-width: inherit;\n  vertical-align: middle;\n}\n.ol-attribution ul, .ol-attribution button {\n  display: inline-block;\n}\n.ol-attribution.ol-collapsed ul {\n  display: none;\n}\n.ol-attribution:not(.ol-collapsed) {\n  background: rgba(255,255,255,0.8);\n}\n.ol-attribution.ol-uncollapsible {\n  bottom: 0;\n  right: 0;\n  border-radius: 4px 0 0;\n  height: 1.1em;\n  line-height: 1em;\n}\n.ol-attribution.ol-uncollapsible img {\n  margin-top: -.2em;\n  max-height: 1.6em;\n}\n.ol-attribution.ol-uncollapsible button {\n  display: none;\n}\n\n.ol-zoomslider {\n  top: 4.5em;\n  left: .5em;\n  height: 200px;\n}\n.ol-zoomslider button {\n  position: relative;\n  height: 10px;\n}\n\n.ol-touch .ol-zoomslider {\n  top: 5.5em;\n}\n\n.ol-overviewmap {\n  left: 0.5em;\n  bottom: 0.5em;\n}\n.ol-overviewmap.ol-uncollapsible {\n  bottom: 0;\n  left: 0;\n  border-radius: 0 4px 0 0;\n}\n.ol-overviewmap .ol-overviewmap-map,\n.ol-overviewmap button {\n  display: inline-block;\n}\n.ol-overviewmap .ol-overviewmap-map {\n  border: 1px solid #7b98bc;\n  height: 150px;\n  margin: 2px;\n  width: 150px;\n}\n.ol-overviewmap:not(.ol-collapsed) button{\n  bottom: 1px;\n  left: 2px;\n  position: absolute;\n}\n.ol-overviewmap.ol-collapsed .ol-overviewmap-map,\n.ol-overviewmap.ol-uncollapsible button {\n  display: none;\n}\n.ol-overviewmap:not(.ol-collapsed) {\n  background: rgba(255,255,255,0.8);\n}\n.ol-overviewmap-box {\n  border: 2px dotted rgba(0,60,136,0.7);\n}\n\n.ol-overviewmap .ol-overviewmap-box:hover {\n  cursor: move;\n}\n",".layer-switcher.shown.ol-control {\n    background-color: transparent;\n}\n\n.layer-switcher.shown.ol-control:hover {\n    background-color: transparent;\n}\n\n.layer-switcher {\n    position: absolute;\n    top: 3.5em;\n    right: 0.5em;\n    text-align: left;\n}\n\n.layer-switcher.shown {\n    bottom: 3em;\n}\n\n.layer-switcher .panel {\n    padding: 0 1em 0 0;\n    margin: 0;\n    border: 4px solid #eee;\n    border-radius: 4px;\n    background-color: white;\n    display: none;\n    max-height: 100%;\n    overflow-y: auto;\n}\n\n.layer-switcher.shown .panel {\n    display: block;\n}\n\n.layer-switcher button {\n    float: right;\n    width: 38px;\n    height: 38px;\n    background-image: 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-webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.5);\n}\n\n.layer-switcher .group button {\n    display: inline-block;\n    vertical-align: top;\n    float: none;\n    width: 16px;\n    height: 16px;\n    background-position: center 2px;\n    background-image: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAW0lEQVR4nGNgGAWMyBwXFxcGBgaGeii3EU0tXHzPnj1wQRYsihqQ+I0ExDEMQAYNONgoAN0AmMkNaDSyQSheY8JiaCMOGzE04zIAmyFYNTMw4A+DRhzsUUBtAADw4BCeIZkGdwAAAABJRU5ErkJggg==');\n    -webkit-transition: -webkit-transform .2s ease-in-out;\n    -ms-transition: -ms-transform .2s ease-in-out;\n    transition: transform .2s ease-in-out;\n}\n\n.layer-switcher .group.layer-switcher-close button {\n    transform: rotate(-90deg);\n    -webkit-transform: rotate(-90deg);\n}\n\nli.group.layer-switcher-fold {\n    margin-left: -18px;\n}\n\n.layer-switcher .group.layer-switcher-fold > ul {\n    padding-left: 3em;\n}\n\n.layer-switcher .group.layer-switcher-fold.layer-switcher-close > ul {\n    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\ No newline at end of file
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{\n  box-sizing: border-box;\n  border-radius: 2px;\n  border: 2px solid blue;\n}\n\n.ol-mouse-position {\n  top: 8px;\n  right: 8px;\n  position: absolute;\n}\n\n.ol-scale-line {\n  background: rgba(0,60,136,0.3);\n  border-radius: 4px;\n  bottom: 8px;\n  left: 8px;\n  padding: 2px;\n  position: absolute;\n}\n.ol-scale-line-inner {\n  border: 1px solid #eee;\n  border-top: none;\n  color: #eee;\n  font-size: 10px;\n  text-align: center;\n  margin: 1px;\n  will-change: contents, width;\n}\n.ol-overlay-container {\n  will-change: left,right,top,bottom;\n}\n\n.ol-unsupported {\n  display: none;\n}\n.ol-viewport, .ol-unselectable {\n  -webkit-touch-callout: none;\n  -webkit-user-select: none;\n  -moz-user-select: none;\n  -ms-user-select: none;\n  user-select: none;\n  -webkit-tap-highlight-color: rgba(0,0,0,0);\n}\n.ol-selectable {\n  -webkit-touch-callout: default;\n  -webkit-user-select: text;\n  -moz-user-select: text;\n  -ms-user-select: text;\n  user-select: text;\n}\n.ol-grabbing {\n  cursor: -webkit-grabbing;\n  cursor: -moz-grabbing;\n  cursor: grabbing;\n}\n.ol-grab {\n  cursor: move;\n  cursor: -webkit-grab;\n  cursor: -moz-grab;\n  cursor: grab;\n}\n.ol-control {\n  position: absolute;\n  background-color: rgba(255,255,255,0.4);\n  border-radius: 4px;\n  padding: 2px;\n}\n.ol-control:hover {\n  background-color: rgba(255,255,255,0.6);\n}\n.ol-zoom {\n  top: .5em;\n  left: .5em;\n}\n.ol-rotate {\n  top: .5em;\n  right: .5em;\n  transition: opacity .25s linear, visibility 0s linear;\n}\n.ol-rotate.ol-hidden {\n  opacity: 0;\n  visibility: hidden;\n  transition: opacity .25s linear, visibility 0s linear .25s;\n}\n.ol-zoom-extent {\n  top: 4.643em;\n  left: .5em;\n}\n.ol-full-screen {\n  right: .5em;\n  top: .5em;\n}\n@media print {\n  .ol-control {\n    display: none;\n  }\n}\n\n.ol-control button {\n  display: block;\n  margin: 1px;\n  padding: 0;\n  color: white;\n  font-size: 1.14em;\n  font-weight: bold;\n  text-decoration: none;\n  text-align: center;\n  height: 1.375em;\n  width: 1.375em;\n  line-height: .4em;\n  background-color: rgba(0,60,136,0.5);\n  border: none;\n  border-radius: 2px;\n}\n.ol-control button::-moz-focus-inner {\n  border: none;\n  padding: 0;\n}\n.ol-zoom-extent button {\n  line-height: 1.4em;\n}\n.ol-compass {\n  display: block;\n  font-weight: normal;\n  font-size: 1.2em;\n  will-change: transform;\n}\n.ol-touch .ol-control button {\n  font-size: 1.5em;\n}\n.ol-touch .ol-zoom-extent {\n  top: 5.5em;\n}\n.ol-control button:hover,\n.ol-control button:focus {\n  text-decoration: none;\n  background-color: rgba(0,60,136,0.7);\n}\n.ol-zoom .ol-zoom-in {\n  border-radius: 2px 2px 0 0;\n}\n.ol-zoom .ol-zoom-out {\n  border-radius: 0 0 2px 2px;\n}\n\n\n.ol-attribution {\n  text-align: right;\n  bottom: .5em;\n  right: .5em;\n  max-width: calc(100% - 1.3em);\n}\n\n.ol-attribution ul {\n  margin: 0;\n  padding: 0 .5em;\n  font-size: .7rem;\n  line-height: 1.375em;\n  color: #000;\n  text-shadow: 0 0 2px #fff;\n}\n.ol-attribution li {\n  display: inline;\n  list-style: none;\n  line-height: inherit;\n}\n.ol-attribution li:not(:last-child):after {\n  content: \" \";\n}\n.ol-attribution img {\n  max-height: 2em;\n  max-width: inherit;\n  vertical-align: middle;\n}\n.ol-attribution ul, .ol-attribution button {\n  display: inline-block;\n}\n.ol-attribution.ol-collapsed ul {\n  display: none;\n}\n.ol-attribution:not(.ol-collapsed) {\n  background: rgba(255,255,255,0.8);\n}\n.ol-attribution.ol-uncollapsible {\n  bottom: 0;\n  right: 0;\n  border-radius: 4px 0 0;\n  height: 1.1em;\n  line-height: 1em;\n}\n.ol-attribution.ol-uncollapsible img {\n  margin-top: -.2em;\n  max-height: 1.6em;\n}\n.ol-attribution.ol-uncollapsible button {\n  display: none;\n}\n\n.ol-zoomslider {\n  top: 4.5em;\n  left: .5em;\n  height: 200px;\n}\n.ol-zoomslider button {\n  position: relative;\n  height: 10px;\n}\n\n.ol-touch .ol-zoomslider {\n  top: 5.5em;\n}\n\n.ol-overviewmap {\n  left: 0.5em;\n  bottom: 0.5em;\n}\n.ol-overviewmap.ol-uncollapsible {\n  bottom: 0;\n  left: 0;\n  border-radius: 0 4px 0 0;\n}\n.ol-overviewmap .ol-overviewmap-map,\n.ol-overviewmap button {\n  display: inline-block;\n}\n.ol-overviewmap .ol-overviewmap-map {\n  border: 1px solid #7b98bc;\n  height: 150px;\n  margin: 2px;\n  width: 150px;\n}\n.ol-overviewmap:not(.ol-collapsed) button{\n  bottom: 1px;\n  left: 2px;\n  position: absolute;\n}\n.ol-overviewmap.ol-collapsed .ol-overviewmap-map,\n.ol-overviewmap.ol-uncollapsible button {\n  display: none;\n}\n.ol-overviewmap:not(.ol-collapsed) {\n  background: rgba(255,255,255,0.8);\n}\n.ol-overviewmap-box {\n  border: 2px dotted rgba(0,60,136,0.7);\n}\n\n.ol-overviewmap .ol-overviewmap-box:hover {\n  cursor: move;\n}\n",".layer-switcher.shown.ol-control {\n    background-color: transparent;\n}\n\n.layer-switcher.shown.ol-control:hover {\n    background-color: transparent;\n}\n\n.layer-switcher {\n    position: absolute;\n    top: 3.5em;\n    right: 0.5em;\n    text-align: left;\n}\n\n.layer-switcher.shown {\n    bottom: 3em;\n}\n\n.layer-switcher .panel {\n    padding: 0 1em 0 0;\n    margin: 0;\n    border: 4px solid #eee;\n    border-radius: 4px;\n    background-color: white;\n    display: none;\n    max-height: 100%;\n    overflow-y: auto;\n}\n\n.layer-switcher.shown .panel {\n    display: block;\n}\n\n.layer-switcher button {\n    float: right;\n    width: 38px;\n    height: 38px;\n    background-image: url('data:image/png;base64,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') /*logo.png*/;\n    background-repeat: no-repeat;\n    background-position: 2px;\n    background-color: white;\n    border: none;\n}\n\n.layer-switcher.shown button {\n    display: none;\n}\n\n.layer-switcher button:focus, .layer-switcher button:hover {\n    background-color: white;\n}\n\n.layer-switcher ul {\n    padding-left: 2em;\n    list-style: none;\n}\n\n.layer-switcher li.group > label {\n    font-weight: bold;\n}\n\n.layer-switcher li.layer {\n    display: table;\n}\n\n.layer-switcher li.layer label, .layer-switcher li.layer input {\n    display: table-cell;\n    vertical-align: middle;\n}\n\n.layer-switcher label.disabled {\n    opacity:0.4;\n}\n\n.layer-switcher input {\n    margin: 4px;\n}\n\n.layer-switcher.touch ::-webkit-scrollbar {\n    width: 4px;\n}\n\n.layer-switcher.touch ::-webkit-scrollbar-track {\n    -webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.3);\n    border-radius: 10px;\n}\n\n.layer-switcher.touch ::-webkit-scrollbar-thumb {\n    border-radius: 10px;\n    -webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.5);\n}\n\n.layer-switcher .group button {\n    display: inline-block;\n    vertical-align: top;\n    float: none;\n    width: 16px;\n    height: 16px;\n    background-position: center 2px;\n    background-image: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAW0lEQVR4nGNgGAWMyBwXFxcGBgaGeii3EU0tXHzPnj1wQRYsihqQ+I0ExDEMQAYNONgoAN0AmMkNaDSyQSheY8JiaCMOGzE04zIAmyFYNTMw4A+DRhzsUUBtAADw4BCeIZkGdwAAAABJRU5ErkJggg==');\n    -webkit-transition: -webkit-transform .2s ease-in-out;\n    -ms-transition: -ms-transform .2s ease-in-out;\n    transition: transform .2s ease-in-out;\n}\n\n.layer-switcher .group.layer-switcher-close button {\n    transform: rotate(-90deg);\n    -webkit-transform: rotate(-90deg);\n}\n\nli.group.layer-switcher-fold {\n    margin-left: -18px;\n}\n\n.layer-switcher .group.layer-switcher-fold > ul {\n    padding-left: 3em;\n}\n\n.layer-switcher .group.layer-switcher-fold.layer-switcher-close > ul {\n    overflow: hidden;\n    height: 0;\n}\n","html, body {\n  margin: 0;\n  height: 100%; }\n\n#map {\n  position: absolute;\n  top: 0;\n  bottom: 0;\n  width: 100%; }\n\n.hidden {\n  display: none; }\n\n.ol-messure {\n  right: .25em;\n  top: 10em;\n  font-size: 1.5em; }\n\n.tooltip {\n  position: relative;\n  background: rgba(0, 0, 0, 0.5);\n  border-radius: 4px;\n  color: white;\n  padding: 4px 8px;\n  opacity: 0.7;\n  white-space: nowrap; }\n\n.tooltip-measure {\n  opacity: 1;\n  font-weight: bold; }\n\n.tooltip-static {\n  background-color: #ffcc33;\n  color: black;\n  border: 1px solid white; }\n\n.tooltip-measure:before,\n.tooltip-static:before {\n  border-top: 6px solid rgba(0, 0, 0, 0.5);\n  border-right: 6px solid transparent;\n  border-left: 6px solid transparent;\n  content: \"\";\n  position: absolute;\n  bottom: -6px;\n  margin-left: -7px;\n  left: 50%; }\n\n.tooltip-static:before {\n  border-top-color: #ffcc33; }\n"],"sourceRoot":""}
\ No newline at end of file
diff --git a/dist/main.js b/dist/main.js
index 42520a2..7663c10 100644
--- a/dist/main.js
+++ b/dist/main.js
@@ -591,11 +591,11 @@ function isEmpty(object) {
 
 "use strict";
 /* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "a", function() { return createCanvasContext2D; });
-/* unused harmony export outerWidth */
-/* unused harmony export outerHeight */
-/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "d", function() { return replaceNode; });
-/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "c", function() { return removeNode; });
-/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "b", function() { return removeChildren; });
+/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "c", function() { return outerWidth; });
+/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "b", function() { return outerHeight; });
+/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "f", function() { return replaceNode; });
+/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "e", function() { return removeNode; });
+/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "d", function() { return removeChildren; });
 /**
  * @module ol/dom
  */
@@ -725,8 +725,8 @@ function VOID() {}
 /* unused harmony export ObjectEvent */
 /* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "b", function() { return getChangeEventType; });
 /* harmony import */ var _util_js__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(0);
-/* harmony import */ var _ObjectEventType_js__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(9);
-/* harmony import */ var _Observable_js__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(14);
+/* harmony import */ var _ObjectEventType_js__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(10);
+/* harmony import */ var _Observable_js__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(13);
 /* harmony import */ var _events_Event_js__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(7);
 /* harmony import */ var _obj_js__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(3);
 /**
@@ -1041,7 +1041,7 @@ function preventDefault(evt) {
 /***/ (function(module, __webpack_exports__, __webpack_require__) {
 
 "use strict";
-/* harmony import */ var _Disposable_js__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(10);
+/* harmony import */ var _Disposable_js__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(11);
 /* harmony import */ var _events_js__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(1);
 /* harmony import */ var _functions_js__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(5);
 /* harmony import */ var _Event_js__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(7);
@@ -1223,75 +1223,10 @@ var Target = /*@__PURE__*/(function (Disposable) {
 /* 9 */
 /***/ (function(module, __webpack_exports__, __webpack_require__) {
 
-"use strict";
-/**
- * @module ol/ObjectEventType
- */
-
-/**
- * @enum {string}
- */
-/* harmony default export */ __webpack_exports__["a"] = ({
-  /**
-   * Triggered when a property is changed.
-   * @event module:ol/Object.ObjectEvent#propertychange
-   * @api
-   */
-  PROPERTYCHANGE: 'propertychange'
-});
-
-//# sourceMappingURL=ObjectEventType.js.map
-
-/***/ }),
-/* 10 */
-/***/ (function(module, __webpack_exports__, __webpack_require__) {
-
-"use strict";
-/**
- * @module ol/Disposable
- */
-
-/**
- * @classdesc
- * Objects that need to clean up after themselves.
- */
-var Disposable = function Disposable() {
-  /**
-   * The object has already been disposed.
-   * @type {boolean}
-   * @private
-   */
-  this.disposed_ = false;
-};
-
-/**
- * Clean up.
- */
-Disposable.prototype.dispose = function dispose () {
-  if (!this.disposed_) {
-    this.disposed_ = true;
-    this.disposeInternal();
-  }
-};
-
-/**
- * Extension point for disposable objects.
- * @protected
- */
-Disposable.prototype.disposeInternal = function disposeInternal () {};
-
-/* harmony default export */ __webpack_exports__["a"] = (Disposable);
-
-//# sourceMappingURL=Disposable.js.map
-
-/***/ }),
-/* 11 */
-/***/ (function(module, __webpack_exports__, __webpack_require__) {
-
 "use strict";
 __webpack_require__.r(__webpack_exports__);
 /* harmony import */ var _functions_js__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(5);
-/* harmony import */ var _MapEventType_js__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(13);
+/* harmony import */ var _MapEventType_js__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(12);
 /* harmony import */ var _Object_js__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(6);
 /* harmony import */ var _dom_js__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(4);
 /* harmony import */ var _events_js__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(1);
@@ -1390,7 +1325,7 @@ var Control = /*@__PURE__*/(function (BaseObject) {
    * @inheritDoc
    */
   Control.prototype.disposeInternal = function disposeInternal () {
-    Object(_dom_js__WEBPACK_IMPORTED_MODULE_3__[/* removeNode */ "c"])(this.element);
+    Object(_dom_js__WEBPACK_IMPORTED_MODULE_3__[/* removeNode */ "e"])(this.element);
     BaseObject.prototype.disposeInternal.call(this);
   };
 
@@ -1412,7 +1347,7 @@ var Control = /*@__PURE__*/(function (BaseObject) {
    */
   Control.prototype.setMap = function setMap (map) {
     if (this.map_) {
-      Object(_dom_js__WEBPACK_IMPORTED_MODULE_3__[/* removeNode */ "c"])(this.element);
+      Object(_dom_js__WEBPACK_IMPORTED_MODULE_3__[/* removeNode */ "e"])(this.element);
     }
     for (var i = 0, ii = this.listenerKeys.length; i < ii; ++i) {
       Object(_events_js__WEBPACK_IMPORTED_MODULE_4__[/* unlistenByKey */ "e"])(this.listenerKeys[i]);
@@ -1454,8 +1389,262 @@ var Control = /*@__PURE__*/(function (BaseObject) {
 
 //# sourceMappingURL=Control.js.map
 
+/***/ }),
+/* 10 */
+/***/ (function(module, __webpack_exports__, __webpack_require__) {
+
+"use strict";
+/**
+ * @module ol/ObjectEventType
+ */
+
+/**
+ * @enum {string}
+ */
+/* harmony default export */ __webpack_exports__["a"] = ({
+  /**
+   * Triggered when a property is changed.
+   * @event module:ol/Object.ObjectEvent#propertychange
+   * @api
+   */
+  PROPERTYCHANGE: 'propertychange'
+});
+
+//# sourceMappingURL=ObjectEventType.js.map
+
+/***/ }),
+/* 11 */
+/***/ (function(module, __webpack_exports__, __webpack_require__) {
+
+"use strict";
+/**
+ * @module ol/Disposable
+ */
+
+/**
+ * @classdesc
+ * Objects that need to clean up after themselves.
+ */
+var Disposable = function Disposable() {
+  /**
+   * The object has already been disposed.
+   * @type {boolean}
+   * @private
+   */
+  this.disposed_ = false;
+};
+
+/**
+ * Clean up.
+ */
+Disposable.prototype.dispose = function dispose () {
+  if (!this.disposed_) {
+    this.disposed_ = true;
+    this.disposeInternal();
+  }
+};
+
+/**
+ * Extension point for disposable objects.
+ * @protected
+ */
+Disposable.prototype.disposeInternal = function disposeInternal () {};
+
+/* harmony default export */ __webpack_exports__["a"] = (Disposable);
+
+//# sourceMappingURL=Disposable.js.map
+
 /***/ }),
 /* 12 */
+/***/ (function(module, __webpack_exports__, __webpack_require__) {
+
+"use strict";
+/**
+ * @module ol/MapEventType
+ */
+
+/**
+ * @enum {string}
+ */
+/* harmony default export */ __webpack_exports__["a"] = ({
+
+  /**
+   * Triggered after a map frame is rendered.
+   * @event module:ol/MapEvent~MapEvent#postrender
+   * @api
+   */
+  POSTRENDER: 'postrender',
+
+  /**
+   * Triggered when the map starts moving.
+   * @event module:ol/MapEvent~MapEvent#movestart
+   * @api
+   */
+  MOVESTART: 'movestart',
+
+  /**
+   * Triggered after the map is moved.
+   * @event module:ol/MapEvent~MapEvent#moveend
+   * @api
+   */
+  MOVEEND: 'moveend'
+
+});
+
+//# sourceMappingURL=MapEventType.js.map
+
+/***/ }),
+/* 13 */
+/***/ (function(module, __webpack_exports__, __webpack_require__) {
+
+"use strict";
+__webpack_require__.r(__webpack_exports__);
+/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "unByKey", function() { return unByKey; });
+/* harmony import */ var _events_js__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(1);
+/* harmony import */ var _events_Target_js__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(8);
+/* harmony import */ var _events_EventType_js__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(2);
+/**
+ * @module ol/Observable
+ */
+
+
+
+
+/**
+ * @classdesc
+ * Abstract base class; normally only used for creating subclasses and not
+ * instantiated in apps.
+ * An event target providing convenient methods for listener registration
+ * and unregistration. A generic `change` event is always available through
+ * {@link module:ol/Observable~Observable#changed}.
+ *
+ * @fires import("./events/Event.js").Event
+ * @api
+ */
+var Observable = /*@__PURE__*/(function (EventTarget) {
+  function Observable() {
+
+    EventTarget.call(this);
+
+    /**
+     * @private
+     * @type {number}
+     */
+    this.revision_ = 0;
+
+  }
+
+  if ( EventTarget ) Observable.__proto__ = EventTarget;
+  Observable.prototype = Object.create( EventTarget && EventTarget.prototype );
+  Observable.prototype.constructor = Observable;
+
+  /**
+   * Increases the revision counter and dispatches a 'change' event.
+   * @api
+   */
+  Observable.prototype.changed = function changed () {
+    ++this.revision_;
+    this.dispatchEvent(_events_EventType_js__WEBPACK_IMPORTED_MODULE_2__[/* default */ "a"].CHANGE);
+  };
+
+  /**
+   * Get the version number for this object.  Each time the object is modified,
+   * its version number will be incremented.
+   * @return {number} Revision.
+   * @api
+   */
+  Observable.prototype.getRevision = function getRevision () {
+    return this.revision_;
+  };
+
+  /**
+   * Listen for a certain type of event.
+   * @param {string|Array<string>} type The event type or array of event types.
+   * @param {function(?): ?} listener The listener function.
+   * @return {import("./events.js").EventsKey|Array<import("./events.js").EventsKey>} Unique key for the listener. If
+   *     called with an array of event types as the first argument, the return
+   *     will be an array of keys.
+   * @api
+   */
+  Observable.prototype.on = function on (type, listener) {
+    if (Array.isArray(type)) {
+      var len = type.length;
+      var keys = new Array(len);
+      for (var i = 0; i < len; ++i) {
+        keys[i] = Object(_events_js__WEBPACK_IMPORTED_MODULE_0__[/* listen */ "a"])(this, type[i], listener);
+      }
+      return keys;
+    } else {
+      return Object(_events_js__WEBPACK_IMPORTED_MODULE_0__[/* listen */ "a"])(this, /** @type {string} */ (type), listener);
+    }
+  };
+
+  /**
+   * Listen once for a certain type of event.
+   * @param {string|Array<string>} type The event type or array of event types.
+   * @param {function(?): ?} listener The listener function.
+   * @return {import("./events.js").EventsKey|Array<import("./events.js").EventsKey>} Unique key for the listener. If
+   *     called with an array of event types as the first argument, the return
+   *     will be an array of keys.
+   * @api
+   */
+  Observable.prototype.once = function once (type, listener) {
+    if (Array.isArray(type)) {
+      var len = type.length;
+      var keys = new Array(len);
+      for (var i = 0; i < len; ++i) {
+        keys[i] = Object(_events_js__WEBPACK_IMPORTED_MODULE_0__[/* listenOnce */ "b"])(this, type[i], listener);
+      }
+      return keys;
+    } else {
+      return Object(_events_js__WEBPACK_IMPORTED_MODULE_0__[/* listenOnce */ "b"])(this, /** @type {string} */ (type), listener);
+    }
+  };
+
+  /**
+   * Unlisten for a certain type of event.
+   * @param {string|Array<string>} type The event type or array of event types.
+   * @param {function(?): ?} listener The listener function.
+   * @api
+   */
+  Observable.prototype.un = function un (type, listener) {
+    if (Array.isArray(type)) {
+      for (var i = 0, ii = type.length; i < ii; ++i) {
+        Object(_events_js__WEBPACK_IMPORTED_MODULE_0__[/* unlisten */ "c"])(this, type[i], listener);
+      }
+      return;
+    } else {
+      Object(_events_js__WEBPACK_IMPORTED_MODULE_0__[/* unlisten */ "c"])(this, /** @type {string} */ (type), listener);
+    }
+  };
+
+  return Observable;
+}(_events_Target_js__WEBPACK_IMPORTED_MODULE_1__[/* default */ "a"]));
+
+
+/**
+ * Removes an event listener using the key returned by `on()` or `once()`.
+ * @param {import("./events.js").EventsKey|Array<import("./events.js").EventsKey>} key The key returned by `on()`
+ *     or `once()` (or an array of keys).
+ * @api
+ */
+function unByKey(key) {
+  if (Array.isArray(key)) {
+    for (var i = 0, ii = key.length; i < ii; ++i) {
+      Object(_events_js__WEBPACK_IMPORTED_MODULE_0__[/* unlistenByKey */ "e"])(key[i]);
+    }
+  } else {
+    Object(_events_js__WEBPACK_IMPORTED_MODULE_0__[/* unlistenByKey */ "e"])(/** @type {import("./events.js").EventsKey} */ (key));
+  }
+}
+
+
+/* harmony default export */ __webpack_exports__["default"] = (Observable);
+
+//# sourceMappingURL=Observable.js.map
+
+/***/ }),
+/* 14 */
 /***/ (function(module, exports, __webpack_require__) {
 
 "use strict";
@@ -2023,201 +2212,12 @@ function multiSelect(arr, left, right, n, compare) {
 }
 
 
-/***/ }),
-/* 13 */
-/***/ (function(module, __webpack_exports__, __webpack_require__) {
-
-"use strict";
-/**
- * @module ol/MapEventType
- */
-
-/**
- * @enum {string}
- */
-/* harmony default export */ __webpack_exports__["a"] = ({
-
-  /**
-   * Triggered after a map frame is rendered.
-   * @event module:ol/MapEvent~MapEvent#postrender
-   * @api
-   */
-  POSTRENDER: 'postrender',
-
-  /**
-   * Triggered when the map starts moving.
-   * @event module:ol/MapEvent~MapEvent#movestart
-   * @api
-   */
-  MOVESTART: 'movestart',
-
-  /**
-   * Triggered after the map is moved.
-   * @event module:ol/MapEvent~MapEvent#moveend
-   * @api
-   */
-  MOVEEND: 'moveend'
-
-});
-
-//# sourceMappingURL=MapEventType.js.map
-
-/***/ }),
-/* 14 */
-/***/ (function(module, __webpack_exports__, __webpack_require__) {
-
-"use strict";
-__webpack_require__.r(__webpack_exports__);
-/* harmony export (binding) */ __webpack_require__.d(__webpack_exports__, "unByKey", function() { return unByKey; });
-/* harmony import */ var _events_js__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(1);
-/* harmony import */ var _events_Target_js__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(8);
-/* harmony import */ var _events_EventType_js__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(2);
-/**
- * @module ol/Observable
- */
-
-
-
-
-/**
- * @classdesc
- * Abstract base class; normally only used for creating subclasses and not
- * instantiated in apps.
- * An event target providing convenient methods for listener registration
- * and unregistration. A generic `change` event is always available through
- * {@link module:ol/Observable~Observable#changed}.
- *
- * @fires import("./events/Event.js").Event
- * @api
- */
-var Observable = /*@__PURE__*/(function (EventTarget) {
-  function Observable() {
-
-    EventTarget.call(this);
-
-    /**
-     * @private
-     * @type {number}
-     */
-    this.revision_ = 0;
-
-  }
-
-  if ( EventTarget ) Observable.__proto__ = EventTarget;
-  Observable.prototype = Object.create( EventTarget && EventTarget.prototype );
-  Observable.prototype.constructor = Observable;
-
-  /**
-   * Increases the revision counter and dispatches a 'change' event.
-   * @api
-   */
-  Observable.prototype.changed = function changed () {
-    ++this.revision_;
-    this.dispatchEvent(_events_EventType_js__WEBPACK_IMPORTED_MODULE_2__[/* default */ "a"].CHANGE);
-  };
-
-  /**
-   * Get the version number for this object.  Each time the object is modified,
-   * its version number will be incremented.
-   * @return {number} Revision.
-   * @api
-   */
-  Observable.prototype.getRevision = function getRevision () {
-    return this.revision_;
-  };
-
-  /**
-   * Listen for a certain type of event.
-   * @param {string|Array<string>} type The event type or array of event types.
-   * @param {function(?): ?} listener The listener function.
-   * @return {import("./events.js").EventsKey|Array<import("./events.js").EventsKey>} Unique key for the listener. If
-   *     called with an array of event types as the first argument, the return
-   *     will be an array of keys.
-   * @api
-   */
-  Observable.prototype.on = function on (type, listener) {
-    if (Array.isArray(type)) {
-      var len = type.length;
-      var keys = new Array(len);
-      for (var i = 0; i < len; ++i) {
-        keys[i] = Object(_events_js__WEBPACK_IMPORTED_MODULE_0__[/* listen */ "a"])(this, type[i], listener);
-      }
-      return keys;
-    } else {
-      return Object(_events_js__WEBPACK_IMPORTED_MODULE_0__[/* listen */ "a"])(this, /** @type {string} */ (type), listener);
-    }
-  };
-
-  /**
-   * Listen once for a certain type of event.
-   * @param {string|Array<string>} type The event type or array of event types.
-   * @param {function(?): ?} listener The listener function.
-   * @return {import("./events.js").EventsKey|Array<import("./events.js").EventsKey>} Unique key for the listener. If
-   *     called with an array of event types as the first argument, the return
-   *     will be an array of keys.
-   * @api
-   */
-  Observable.prototype.once = function once (type, listener) {
-    if (Array.isArray(type)) {
-      var len = type.length;
-      var keys = new Array(len);
-      for (var i = 0; i < len; ++i) {
-        keys[i] = Object(_events_js__WEBPACK_IMPORTED_MODULE_0__[/* listenOnce */ "b"])(this, type[i], listener);
-      }
-      return keys;
-    } else {
-      return Object(_events_js__WEBPACK_IMPORTED_MODULE_0__[/* listenOnce */ "b"])(this, /** @type {string} */ (type), listener);
-    }
-  };
-
-  /**
-   * Unlisten for a certain type of event.
-   * @param {string|Array<string>} type The event type or array of event types.
-   * @param {function(?): ?} listener The listener function.
-   * @api
-   */
-  Observable.prototype.un = function un (type, listener) {
-    if (Array.isArray(type)) {
-      for (var i = 0, ii = type.length; i < ii; ++i) {
-        Object(_events_js__WEBPACK_IMPORTED_MODULE_0__[/* unlisten */ "c"])(this, type[i], listener);
-      }
-      return;
-    } else {
-      Object(_events_js__WEBPACK_IMPORTED_MODULE_0__[/* unlisten */ "c"])(this, /** @type {string} */ (type), listener);
-    }
-  };
-
-  return Observable;
-}(_events_Target_js__WEBPACK_IMPORTED_MODULE_1__[/* default */ "a"]));
-
-
-/**
- * Removes an event listener using the key returned by `on()` or `once()`.
- * @param {import("./events.js").EventsKey|Array<import("./events.js").EventsKey>} key The key returned by `on()`
- *     or `once()` (or an array of keys).
- * @api
- */
-function unByKey(key) {
-  if (Array.isArray(key)) {
-    for (var i = 0, ii = key.length; i < ii; ++i) {
-      Object(_events_js__WEBPACK_IMPORTED_MODULE_0__[/* unlistenByKey */ "e"])(key[i]);
-    }
-  } else {
-    Object(_events_js__WEBPACK_IMPORTED_MODULE_0__[/* unlistenByKey */ "e"])(/** @type {import("./events.js").EventsKey} */ (key));
-  }
-}
-
-
-/* harmony default export */ __webpack_exports__["default"] = (Observable);
-
-//# sourceMappingURL=Observable.js.map
-
 /***/ }),
 /* 15 */
 /***/ (function(module, exports, __webpack_require__) {
 
 (function (global, factory) {
-	 true ? module.exports = factory(__webpack_require__(11), __webpack_require__(14)) :
+	 true ? module.exports = factory(__webpack_require__(9), __webpack_require__(13)) :
 	undefined;
 }(this, (function (Control,ol_Observable) { 'use strict';
 
@@ -5965,7 +5965,7 @@ var MapBrowserEventHandler_MapBrowserEventHandler = /*@__PURE__*/(function (Even
 
 //# sourceMappingURL=MapBrowserEventHandler.js.map
 // EXTERNAL MODULE: ./node_modules/ol/MapEventType.js
-var MapEventType = __webpack_require__(13);
+var MapEventType = __webpack_require__(12);
 
 // CONCATENATED MODULE: ./node_modules/ol/MapProperty.js
 /**
@@ -6018,7 +6018,7 @@ var MapEventType = __webpack_require__(13);
 
 //# sourceMappingURL=EventType.js.map
 // EXTERNAL MODULE: ./node_modules/ol/ObjectEventType.js
-var ObjectEventType = __webpack_require__(9);
+var ObjectEventType = __webpack_require__(10);
 
 // CONCATENATED MODULE: ./node_modules/ol/TileState.js
 /**
@@ -15832,7 +15832,7 @@ var PluggableMap_PluggableMap = /*@__PURE__*/(function (BaseObject) {
 
     if (!targetElement) {
       this.renderer_.removeLayerRenderers();
-      Object(dom["c" /* removeNode */])(this.viewport_);
+      Object(dom["e" /* removeNode */])(this.viewport_);
       if (this.handleResize_ !== undefined) {
         removeEventListener(EventType["a" /* default */].RESIZE, this.handleResize_, false);
         this.handleResize_ = undefined;
@@ -16263,7 +16263,7 @@ function getLoading(layers) {
 
 //# sourceMappingURL=PluggableMap.js.map
 // EXTERNAL MODULE: ./node_modules/ol/control/Control.js
-var control_Control = __webpack_require__(11);
+var control_Control = __webpack_require__(9);
 
 // CONCATENATED MODULE: ./node_modules/ol/css.js
 /**
@@ -16835,7 +16835,7 @@ var Attribution_Attribution = /*@__PURE__*/(function (Control) {
       return;
     }
 
-    Object(dom["b" /* removeChildren */])(this.ulElement_);
+    Object(dom["d" /* removeChildren */])(this.ulElement_);
 
     // append the attributions
     for (var i = 0, ii = attributions.length; i < ii; ++i) {
@@ -16862,9 +16862,9 @@ var Attribution_Attribution = /*@__PURE__*/(function (Control) {
   Attribution.prototype.handleToggle_ = function handleToggle_ () {
     this.element.classList.toggle(CLASS_COLLAPSED);
     if (this.collapsed_) {
-      Object(dom["d" /* replaceNode */])(this.collapseLabel_, this.label_);
+      Object(dom["f" /* replaceNode */])(this.collapseLabel_, this.label_);
     } else {
-      Object(dom["d" /* replaceNode */])(this.label_, this.collapseLabel_);
+      Object(dom["f" /* replaceNode */])(this.label_, this.collapseLabel_);
     }
     this.collapsed_ = !this.collapsed_;
   };
@@ -18590,7 +18590,7 @@ var DragRotate_DragRotate = /*@__PURE__*/(function (PointerInteraction) {
 
 //# sourceMappingURL=DragRotate.js.map
 // EXTERNAL MODULE: ./node_modules/ol/Disposable.js
-var ol_Disposable = __webpack_require__(10);
+var ol_Disposable = __webpack_require__(11);
 
 // CONCATENATED MODULE: ./node_modules/ol/render/Box.js
 /**
@@ -23167,7 +23167,7 @@ var Map_CanvasMapRenderer = /*@__PURE__*/(function (MapRenderer) {
 
 //# sourceMappingURL=Map.js.map
 // EXTERNAL MODULE: ./node_modules/ol/Observable.js
-var ol_Observable = __webpack_require__(14);
+var ol_Observable = __webpack_require__(13);
 
 // CONCATENATED MODULE: ./node_modules/ol/renderer/Layer.js
 /**
@@ -24513,7 +24513,7 @@ TileLayer_CanvasTileLayerRenderer.prototype.getLayer;
 
 //# sourceMappingURL=TileLayer.js.map
 // EXTERNAL MODULE: ./node_modules/rbush/index.js
-var rbush = __webpack_require__(12);
+var rbush = __webpack_require__(14);
 var rbush_default = /*#__PURE__*/__webpack_require__.n(rbush);
 
 // CONCATENATED MODULE: ./node_modules/ol/render/ReplayGroup.js
@@ -39998,10 +39998,458 @@ var WebGLMap_WebGLMap = /*@__PURE__*/(function (PluggableMap) {
 /* harmony default export */ var ol_WebGLMap = (WebGLMap_WebGLMap);
 
 //# sourceMappingURL=WebGLMap.js.map
-// EXTERNAL MODULE: ./node_modules/ol-layerswitcher/dist/ol-layerswitcher.js
-var ol_layerswitcher = __webpack_require__(15);
-var ol_layerswitcher_default = /*#__PURE__*/__webpack_require__.n(ol_layerswitcher);
+// CONCATENATED MODULE: ./node_modules/ol/control/ScaleLine.js
+/**
+ * @module ol/control/ScaleLine
+ */
 
+
+
+
+
+
+
+
+
+/**
+ * @type {string}
+ */
+var UNITS_PROP = 'units';
+
+/**
+ * Units for the scale line. Supported values are `'degrees'`, `'imperial'`,
+ * `'nautical'`, `'metric'`, `'us'`.
+ * @enum {string}
+ */
+var ScaleLine_Units = {
+  DEGREES: 'degrees',
+  IMPERIAL: 'imperial',
+  NAUTICAL: 'nautical',
+  METRIC: 'metric',
+  US: 'us'
+};
+
+
+/**
+ * @const
+ * @type {Array<number>}
+ */
+var LEADING_DIGITS = [1, 2, 5];
+
+
+/**
+ * @typedef {Object} Options
+ * @property {string} [className='ol-scale-line'] CSS Class name.
+ * @property {number} [minWidth=64] Minimum width in pixels.
+ * @property {function(import("../MapEvent.js").default)} [render] Function called when the control
+ * should be re-rendered. This is called in a `requestAnimationFrame` callback.
+ * @property {HTMLElement|string} [target] Specify a target if you want the control
+ * to be rendered outside of the map's viewport.
+ * @property {Units|string} [units='metric'] Units.
+ */
+
+
+/**
+ * @classdesc
+ * A control displaying rough y-axis distances, calculated for the center of the
+ * viewport. For conformal projections (e.g. EPSG:3857, the default view
+ * projection in OpenLayers), the scale is valid for all directions.
+ * No scale line will be shown when the y-axis distance of a pixel at the
+ * viewport center cannot be calculated in the view projection.
+ * By default the scale line will show in the bottom left portion of the map,
+ * but this can be changed by using the css selector `.ol-scale-line`.
+ *
+ * @api
+ */
+var ScaleLine_ScaleLine = /*@__PURE__*/(function (Control) {
+  function ScaleLine(opt_options) {
+
+    var options = opt_options ? opt_options : {};
+
+    var className = options.className !== undefined ? options.className : 'ol-scale-line';
+
+    Control.call(this, {
+      element: document.createElement('div'),
+      render: options.render || ScaleLine_render,
+      target: options.target
+    });
+
+    /**
+     * @private
+     * @type {HTMLElement}
+     */
+    this.innerElement_ = document.createElement('div');
+    this.innerElement_.className = className + '-inner';
+
+    this.element.className = className + ' ' + CLASS_UNSELECTABLE;
+    this.element.appendChild(this.innerElement_);
+
+    /**
+     * @private
+     * @type {?import("../View.js").State}
+     */
+    this.viewState_ = null;
+
+    /**
+     * @private
+     * @type {number}
+     */
+    this.minWidth_ = options.minWidth !== undefined ? options.minWidth : 64;
+
+    /**
+     * @private
+     * @type {boolean}
+     */
+    this.renderedVisible_ = false;
+
+    /**
+     * @private
+     * @type {number|undefined}
+     */
+    this.renderedWidth_ = undefined;
+
+    /**
+     * @private
+     * @type {string}
+     */
+    this.renderedHTML_ = '';
+
+    Object(ol_events["a" /* listen */])(
+      this, Object(ol_Object["b" /* getChangeEventType */])(UNITS_PROP),
+      this.handleUnitsChanged_, this);
+
+    this.setUnits(/** @type {Units} */ (options.units) || ScaleLine_Units.METRIC);
+
+  }
+
+  if ( Control ) ScaleLine.__proto__ = Control;
+  ScaleLine.prototype = Object.create( Control && Control.prototype );
+  ScaleLine.prototype.constructor = ScaleLine;
+
+  /**
+   * Return the units to use in the scale line.
+   * @return {Units} The units
+   * to use in the scale line.
+   * @observable
+   * @api
+   */
+  ScaleLine.prototype.getUnits = function getUnits () {
+    return this.get(UNITS_PROP);
+  };
+
+  /**
+   * @private
+   */
+  ScaleLine.prototype.handleUnitsChanged_ = function handleUnitsChanged_ () {
+    this.updateElement_();
+  };
+
+  /**
+   * Set the units to use in the scale line.
+   * @param {Units} units The units to use in the scale line.
+   * @observable
+   * @api
+   */
+  ScaleLine.prototype.setUnits = function setUnits (units) {
+    this.set(UNITS_PROP, units);
+  };
+
+  /**
+   * @private
+   */
+  ScaleLine.prototype.updateElement_ = function updateElement_ () {
+    var viewState = this.viewState_;
+
+    if (!viewState) {
+      if (this.renderedVisible_) {
+        this.element.style.display = 'none';
+        this.renderedVisible_ = false;
+      }
+      return;
+    }
+
+    var center = viewState.center;
+    var projection = viewState.projection;
+    var units = this.getUnits();
+    var pointResolutionUnits = units == ScaleLine_Units.DEGREES ?
+      proj_Units.DEGREES :
+      proj_Units.METERS;
+    var pointResolution =
+        getPointResolution(projection, viewState.resolution, center, pointResolutionUnits);
+    if (projection.getUnits() != proj_Units.DEGREES && projection.getMetersPerUnit()
+      && pointResolutionUnits == proj_Units.METERS) {
+      pointResolution *= projection.getMetersPerUnit();
+    }
+
+    var nominalCount = this.minWidth_ * pointResolution;
+    var suffix = '';
+    if (units == ScaleLine_Units.DEGREES) {
+      var metersPerDegree = METERS_PER_UNIT[proj_Units.DEGREES];
+      if (projection.getUnits() == proj_Units.DEGREES) {
+        nominalCount *= metersPerDegree;
+      } else {
+        pointResolution /= metersPerDegree;
+      }
+      if (nominalCount < metersPerDegree / 60) {
+        suffix = '\u2033'; // seconds
+        pointResolution *= 3600;
+      } else if (nominalCount < metersPerDegree) {
+        suffix = '\u2032'; // minutes
+        pointResolution *= 60;
+      } else {
+        suffix = '\u00b0'; // degrees
+      }
+    } else if (units == ScaleLine_Units.IMPERIAL) {
+      if (nominalCount < 0.9144) {
+        suffix = 'in';
+        pointResolution /= 0.0254;
+      } else if (nominalCount < 1609.344) {
+        suffix = 'ft';
+        pointResolution /= 0.3048;
+      } else {
+        suffix = 'mi';
+        pointResolution /= 1609.344;
+      }
+    } else if (units == ScaleLine_Units.NAUTICAL) {
+      pointResolution /= 1852;
+      suffix = 'nm';
+    } else if (units == ScaleLine_Units.METRIC) {
+      if (nominalCount < 0.001) {
+        suffix = 'μm';
+        pointResolution *= 1000000;
+      } else if (nominalCount < 1) {
+        suffix = 'mm';
+        pointResolution *= 1000;
+      } else if (nominalCount < 1000) {
+        suffix = 'm';
+      } else {
+        suffix = 'km';
+        pointResolution /= 1000;
+      }
+    } else if (units == ScaleLine_Units.US) {
+      if (nominalCount < 0.9144) {
+        suffix = 'in';
+        pointResolution *= 39.37;
+      } else if (nominalCount < 1609.344) {
+        suffix = 'ft';
+        pointResolution /= 0.30480061;
+      } else {
+        suffix = 'mi';
+        pointResolution /= 1609.3472;
+      }
+    } else {
+      assert(false, 33); // Invalid units
+    }
+
+    var i = 3 * Math.floor(
+      Math.log(this.minWidth_ * pointResolution) / Math.log(10));
+    var count, width;
+    while (true) {
+      count = LEADING_DIGITS[((i % 3) + 3) % 3] *
+          Math.pow(10, Math.floor(i / 3));
+      width = Math.round(count / pointResolution);
+      if (isNaN(width)) {
+        this.element.style.display = 'none';
+        this.renderedVisible_ = false;
+        return;
+      } else if (width >= this.minWidth_) {
+        break;
+      }
+      ++i;
+    }
+
+    var html = count + ' ' + suffix;
+    if (this.renderedHTML_ != html) {
+      this.innerElement_.innerHTML = html;
+      this.renderedHTML_ = html;
+    }
+
+    if (this.renderedWidth_ != width) {
+      this.innerElement_.style.width = width + 'px';
+      this.renderedWidth_ = width;
+    }
+
+    if (!this.renderedVisible_) {
+      this.element.style.display = '';
+      this.renderedVisible_ = true;
+    }
+
+  };
+
+  return ScaleLine;
+}(control_Control["default"]));
+
+
+/**
+ * Update the scale line element.
+ * @param {import("../MapEvent.js").default} mapEvent Map event.
+ * @this {ScaleLine}
+ * @api
+ */
+function ScaleLine_render(mapEvent) {
+  var frameState = mapEvent.frameState;
+  if (!frameState) {
+    this.viewState_ = null;
+  } else {
+    this.viewState_ = frameState.viewState;
+  }
+  this.updateElement_();
+}
+
+
+/* harmony default export */ var control_ScaleLine = (ScaleLine_ScaleLine);
+
+//# sourceMappingURL=ScaleLine.js.map
+// CONCATENATED MODULE: ./node_modules/ol/format/FormatType.js
+/**
+ * @module ol/format/FormatType
+ */
+
+/**
+ * @enum {string}
+ */
+/* harmony default export */ var FormatType = ({
+  ARRAY_BUFFER: 'arraybuffer',
+  JSON: 'json',
+  TEXT: 'text',
+  XML: 'xml'
+});
+
+//# sourceMappingURL=FormatType.js.map
+// CONCATENATED MODULE: ./node_modules/ol/featureloader.js
+/**
+ * @module ol/featureloader
+ */
+
+
+
+/**
+ * {@link module:ol/source/Vector} sources use a function of this type to
+ * load features.
+ *
+ * This function takes an {@link module:ol/extent~Extent} representing the area to be loaded,
+ * a `{number}` representing the resolution (map units per pixel) and an
+ * {@link module:ol/proj/Projection} for the projection  as
+ * arguments. `this` within the function is bound to the
+ * {@link module:ol/source/Vector} it's called from.
+ *
+ * The function is responsible for loading the features and adding them to the
+ * source.
+ * @typedef {function(this:(import("./source/Vector").default|import("./VectorTile.js").default), import("./extent.js").Extent, number,
+ *                    import("./proj/Projection.js").default)} FeatureLoader
+ * @api
+ */
+
+
+/**
+ * {@link module:ol/source/Vector} sources use a function of this type to
+ * get the url to load features from.
+ *
+ * This function takes an {@link module:ol/extent~Extent} representing the area
+ * to be loaded, a `{number}` representing the resolution (map units per pixel)
+ * and an {@link module:ol/proj/Projection} for the projection  as
+ * arguments and returns a `{string}` representing the URL.
+ * @typedef {function(import("./extent.js").Extent, number, import("./proj/Projection.js").default): string} FeatureUrlFunction
+ * @api
+ */
+
+
+/**
+ * @param {string|FeatureUrlFunction} url Feature URL service.
+ * @param {import("./format/Feature.js").default} format Feature format.
+ * @param {function(this:import("./VectorTile.js").default, Array<import("./Feature.js").default>, import("./proj/Projection.js").default, import("./extent.js").Extent)|function(this:import("./source/Vector").default, Array<import("./Feature.js").default>)} success
+ *     Function called with the loaded features and optionally with the data
+ *     projection. Called with the vector tile or source as `this`.
+ * @param {function(this:import("./VectorTile.js").default)|function(this:import("./source/Vector").default)} failure
+ *     Function called when loading failed. Called with the vector tile or
+ *     source as `this`.
+ * @return {FeatureLoader} The feature loader.
+ */
+function loadFeaturesXhr(url, format, success, failure) {
+  return (
+    /**
+     * @param {import("./extent.js").Extent} extent Extent.
+     * @param {number} resolution Resolution.
+     * @param {import("./proj/Projection.js").default} projection Projection.
+     * @this {import("./source/Vector").default|import("./VectorTile.js").default}
+     */
+    function(extent, resolution, projection) {
+      var xhr = new XMLHttpRequest();
+      xhr.open('GET',
+        typeof url === 'function' ? url(extent, resolution, projection) : url,
+        true);
+      if (format.getType() == FormatType.ARRAY_BUFFER) {
+        xhr.responseType = 'arraybuffer';
+      }
+      /**
+       * @param {Event} event Event.
+       * @private
+       */
+      xhr.onload = function(event) {
+        // status will be 0 for file:// urls
+        if (!xhr.status || xhr.status >= 200 && xhr.status < 300) {
+          var type = format.getType();
+          /** @type {Document|Node|Object|string|undefined} */
+          var source;
+          if (type == FormatType.JSON || type == FormatType.TEXT) {
+            source = xhr.responseText;
+          } else if (type == FormatType.XML) {
+            source = xhr.responseXML;
+            if (!source) {
+              source = new DOMParser().parseFromString(xhr.responseText, 'application/xml');
+            }
+          } else if (type == FormatType.ARRAY_BUFFER) {
+            source = /** @type {ArrayBuffer} */ (xhr.response);
+          }
+          if (source) {
+            success.call(this, format.readFeatures(source,
+              {featureProjection: projection}),
+            format.readProjection(source), format.getLastExtent());
+          } else {
+            failure.call(this);
+          }
+        } else {
+          failure.call(this);
+        }
+      }.bind(this);
+      /**
+       * @private
+       */
+      xhr.onerror = function() {
+        failure.call(this);
+      }.bind(this);
+      xhr.send();
+    }
+  );
+}
+
+
+/**
+ * Create an XHR feature loader for a `url` and `format`. The feature loader
+ * loads features (with XHR), parses the features, and adds them to the
+ * vector source.
+ * @param {string|FeatureUrlFunction} url Feature URL service.
+ * @param {import("./format/Feature.js").default} format Feature format.
+ * @return {FeatureLoader} The feature loader.
+ * @api
+ */
+function featureloader_xhr(url, format) {
+  return loadFeaturesXhr(url, format,
+    /**
+     * @param {Array<import("./Feature.js").default>} features The loaded features.
+     * @param {import("./proj/Projection.js").default} dataProjection Data
+     * projection.
+     * @this {import("./source/Vector").default|import("./VectorTile.js").default}
+     */
+    function(features, dataProjection) {
+      var sourceOrTile = /** @type {?} */ (this);
+      if (typeof sourceOrTile.addFeatures === 'function') {
+        /** @type {import("./source/Vector").default} */ (sourceOrTile).addFeatures(features);
+      }
+    }, /* FIXME handle error */ functions["c" /* VOID */]);
+}
+
+//# sourceMappingURL=featureloader.js.map
 // CONCATENATED MODULE: ./node_modules/ol/loadingstrategy.js
 /**
  * @module ol/loadingstrategy
@@ -40064,6 +40512,6807 @@ function loadingstrategy_tile(tileGrid) {
 }
 
 //# sourceMappingURL=loadingstrategy.js.map
+// CONCATENATED MODULE: ./node_modules/ol/source/VectorEventType.js
+/**
+ * @module ol/source/VectorEventType
+ */
+
+/**
+ * @enum {string}
+ */
+/* harmony default export */ var VectorEventType = ({
+  /**
+   * Triggered when a feature is added to the source.
+   * @event ol/source/Vector.VectorSourceEvent#addfeature
+   * @api
+   */
+  ADDFEATURE: 'addfeature',
+
+  /**
+   * Triggered when a feature is updated.
+   * @event ol/source/Vector.VectorSourceEvent#changefeature
+   * @api
+   */
+  CHANGEFEATURE: 'changefeature',
+
+  /**
+   * Triggered when the clear method is called on the source.
+   * @event ol/source/Vector.VectorSourceEvent#clear
+   * @api
+   */
+  CLEAR: 'clear',
+
+  /**
+   * Triggered when a feature is removed from the source.
+   * See {@link module:ol/source/Vector#clear source.clear()} for exceptions.
+   * @event ol/source/Vector.VectorSourceEvent#removefeature
+   * @api
+   */
+  REMOVEFEATURE: 'removefeature'
+});
+
+//# sourceMappingURL=VectorEventType.js.map
+// CONCATENATED MODULE: ./node_modules/ol/source/Vector.js
+/**
+ * @module ol/source/Vector
+ */
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+/**
+ * A function that takes an {@link module:ol/extent~Extent} and a resolution as arguments, and
+ * returns an array of {@link module:ol/extent~Extent} with the extents to load. Usually this
+ * is one of the standard {@link module:ol/loadingstrategy} strategies.
+ *
+ * @typedef {function(import("../extent.js").Extent, number): Array<import("../extent.js").Extent>} LoadingStrategy
+ * @api
+ */
+
+
+/**
+ * @classdesc
+ * Events emitted by {@link module:ol/source/Vector} instances are instances of this
+ * type.
+ */
+var VectorSourceEvent = /*@__PURE__*/(function (Event) {
+  function VectorSourceEvent(type, opt_feature) {
+
+    Event.call(this, type);
+
+    /**
+     * The feature being added or removed.
+     * @type {import("../Feature.js").default|undefined}
+     * @api
+     */
+    this.feature = opt_feature;
+
+  }
+
+  if ( Event ) VectorSourceEvent.__proto__ = Event;
+  VectorSourceEvent.prototype = Object.create( Event && Event.prototype );
+  VectorSourceEvent.prototype.constructor = VectorSourceEvent;
+
+  return VectorSourceEvent;
+}(Event["a" /* default */]));
+
+
+/**
+ * @typedef {Object} Options
+ * @property {import("./Source.js").AttributionLike} [attributions] Attributions.
+ * @property {Array<import("../Feature.js").default>|Collection<import("../Feature.js").default>} [features]
+ * Features. If provided as {@link module:ol/Collection}, the features in the source
+ * and the collection will stay in sync.
+ * @property {import("../format/Feature.js").default} [format] The feature format used by the XHR
+ * feature loader when `url` is set. Required if `url` is set, otherwise ignored.
+ * @property {import("../featureloader.js").FeatureLoader} [loader]
+ * The loader function used to load features, from a remote source for example.
+ * If this is not set and `url` is set, the source will create and use an XHR
+ * feature loader.
+ *
+ * Example:
+ *
+ * ```js
+ * import {Vector} from 'ol/source';
+ * import {GeoJSON} from 'ol/format';
+ * import {bbox} from 'ol/loadingstrategy';
+ *
+ * var vectorSource = new Vector({
+ *   format: new GeoJSON(),
+ *   loader: function(extent, resolution, projection) {
+ *      var proj = projection.getCode();
+ *      var url = 'https://ahocevar.com/geoserver/wfs?service=WFS&' +
+ *          'version=1.1.0&request=GetFeature&typename=osm:water_areas&' +
+ *          'outputFormat=application/json&srsname=' + proj + '&' +
+ *          'bbox=' + extent.join(',') + ',' + proj;
+ *      var xhr = new XMLHttpRequest();
+ *      xhr.open('GET', url);
+ *      var onError = function() {
+ *        vectorSource.removeLoadedExtent(extent);
+ *      }
+ *      xhr.onerror = onError;
+ *      xhr.onload = function() {
+ *        if (xhr.status == 200) {
+ *          vectorSource.addFeatures(
+ *              vectorSource.getFormat().readFeatures(xhr.responseText));
+ *        } else {
+ *          onError();
+ *        }
+ *      }
+ *      xhr.send();
+ *    },
+ *    strategy: bbox
+ *  });
+ * ```
+ * @property {boolean} [overlaps=true] This source may have overlapping geometries.
+ * Setting this to `false` (e.g. for sources with polygons that represent administrative
+ * boundaries or TopoJSON sources) allows the renderer to optimise fill and
+ * stroke operations.
+ * @property {LoadingStrategy} [strategy] The loading strategy to use.
+ * By default an {@link module:ol/loadingstrategy~all}
+ * strategy is used, a one-off strategy which loads all features at once.
+ * @property {string|import("../featureloader.js").FeatureUrlFunction} [url]
+ * Setting this option instructs the source to load features using an XHR loader
+ * (see {@link module:ol/featureloader~xhr}). Use a `string` and an
+ * {@link module:ol/loadingstrategy~all} for a one-off download of all features from
+ * the given URL. Use a {@link module:ol/featureloader~FeatureUrlFunction} to generate the url with
+ * other loading strategies.
+ * Requires `format` to be set as well.
+ * When default XHR feature loader is provided, the features will
+ * be transformed from the data projection to the view projection
+ * during parsing. If your remote data source does not advertise its projection
+ * properly, this transformation will be incorrect. For some formats, the
+ * default projection (usually EPSG:4326) can be overridden by setting the
+ * dataProjection constructor option on the format.
+ * Note that if a source contains non-feature data, such as a GeoJSON geometry
+ * or a KML NetworkLink, these will be ignored. Use a custom loader to load these.
+ * @property {boolean} [useSpatialIndex=true]
+ * By default, an RTree is used as spatial index. When features are removed and
+ * added frequently, and the total number of features is low, setting this to
+ * `false` may improve performance.
+ *
+ * Note that
+ * {@link module:ol/source/Vector~VectorSource#getFeaturesInExtent},
+ * {@link module:ol/source/Vector~VectorSource#getClosestFeatureToCoordinate} and
+ * {@link module:ol/source/Vector~VectorSource#getExtent} cannot be used when `useSpatialIndex` is
+ * set to `false`, and {@link module:ol/source/Vector~VectorSource#forEachFeatureInExtent} will loop
+ * through all features.
+ *
+ * When set to `false`, the features will be maintained in an
+ * {@link module:ol/Collection}, which can be retrieved through
+ * {@link module:ol/source/Vector~VectorSource#getFeaturesCollection}.
+ * @property {boolean} [wrapX=true] Wrap the world horizontally. For vector editing across the
+ * -180° and 180° meridians to work properly, this should be set to `false`. The
+ * resulting geometry coordinates will then exceed the world bounds.
+ */
+
+
+/**
+ * @classdesc
+ * Provides a source of features for vector layers. Vector features provided
+ * by this source are suitable for editing. See {@link module:ol/source/VectorTile~VectorTile} for
+ * vector data that is optimized for rendering.
+ *
+ * @fires ol/source/Vector.VectorSourceEvent
+ * @api
+ */
+var Vector_VectorSource = /*@__PURE__*/(function (Source) {
+  function VectorSource(opt_options) {
+
+    var options = opt_options || {};
+
+    Source.call(this, {
+      attributions: options.attributions,
+      projection: undefined,
+      state: State.READY,
+      wrapX: options.wrapX !== undefined ? options.wrapX : true
+    });
+
+    /**
+     * @private
+     * @type {import("../featureloader.js").FeatureLoader}
+     */
+    this.loader_ = functions["c" /* VOID */];
+
+    /**
+     * @private
+     * @type {import("../format/Feature.js").default|undefined}
+     */
+    this.format_ = options.format;
+
+    /**
+     * @private
+     * @type {boolean}
+     */
+    this.overlaps_ = options.overlaps == undefined ? true : options.overlaps;
+
+    /**
+     * @private
+     * @type {string|import("../featureloader.js").FeatureUrlFunction|undefined}
+     */
+    this.url_ = options.url;
+
+    if (options.loader !== undefined) {
+      this.loader_ = options.loader;
+    } else if (this.url_ !== undefined) {
+      assert(this.format_, 7); // `format` must be set when `url` is set
+      // create a XHR feature loader for "url" and "format"
+      this.loader_ = featureloader_xhr(this.url_, /** @type {import("../format/Feature.js").default} */ (this.format_));
+    }
+
+    /**
+     * @private
+     * @type {LoadingStrategy}
+     */
+    this.strategy_ = options.strategy !== undefined ? options.strategy : loadingstrategy_all;
+
+    var useSpatialIndex =
+        options.useSpatialIndex !== undefined ? options.useSpatialIndex : true;
+
+    /**
+     * @private
+     * @type {RBush<import("../Feature.js").default>}
+     */
+    this.featuresRtree_ = useSpatialIndex ? new structs_RBush() : null;
+
+    /**
+     * @private
+     * @type {RBush<{extent: import("../extent.js").Extent}>}
+     */
+    this.loadedExtentsRtree_ = new structs_RBush();
+
+    /**
+     * @private
+     * @type {!Object<string, import("../Feature.js").default>}
+     */
+    this.nullGeometryFeatures_ = {};
+
+    /**
+     * A lookup of features by id (the return from feature.getId()).
+     * @private
+     * @type {!Object<string, import("../Feature.js").default>}
+     */
+    this.idIndex_ = {};
+
+    /**
+     * A lookup of features without id (keyed by getUid(feature)).
+     * @private
+     * @type {!Object<string, import("../Feature.js").default>}
+     */
+    this.undefIdIndex_ = {};
+
+    /**
+     * @private
+     * @type {Object<string, Array<import("../events.js").EventsKey>>}
+     */
+    this.featureChangeKeys_ = {};
+
+    /**
+     * @private
+     * @type {Collection<import("../Feature.js").default>}
+     */
+    this.featuresCollection_ = null;
+
+    var collection, features;
+    if (Array.isArray(options.features)) {
+      features = options.features;
+    } else if (options.features) {
+      collection = options.features;
+      features = collection.getArray();
+    }
+    if (!useSpatialIndex && collection === undefined) {
+      collection = new ol_Collection(features);
+    }
+    if (features !== undefined) {
+      this.addFeaturesInternal(features);
+    }
+    if (collection !== undefined) {
+      this.bindFeaturesCollection_(collection);
+    }
+
+  }
+
+  if ( Source ) VectorSource.__proto__ = Source;
+  VectorSource.prototype = Object.create( Source && Source.prototype );
+  VectorSource.prototype.constructor = VectorSource;
+
+  /**
+   * Add a single feature to the source.  If you want to add a batch of features
+   * at once, call {@link module:ol/source/Vector~VectorSource#addFeatures #addFeatures()}
+   * instead. A feature will not be added to the source if feature with
+   * the same id is already there. The reason for this behavior is to avoid
+   * feature duplication when using bbox or tile loading strategies.
+   * @param {import("../Feature.js").default} feature Feature to add.
+   * @api
+   */
+  VectorSource.prototype.addFeature = function addFeature (feature) {
+    this.addFeatureInternal(feature);
+    this.changed();
+  };
+
+
+  /**
+   * Add a feature without firing a `change` event.
+   * @param {import("../Feature.js").default} feature Feature.
+   * @protected
+   */
+  VectorSource.prototype.addFeatureInternal = function addFeatureInternal (feature) {
+    var featureKey = Object(util["c" /* getUid */])(feature);
+
+    if (!this.addToIndex_(featureKey, feature)) {
+      return;
+    }
+
+    this.setupChangeEvents_(featureKey, feature);
+
+    var geometry = feature.getGeometry();
+    if (geometry) {
+      var extent = geometry.getExtent();
+      if (this.featuresRtree_) {
+        this.featuresRtree_.insert(extent, feature);
+      }
+    } else {
+      this.nullGeometryFeatures_[featureKey] = feature;
+    }
+
+    this.dispatchEvent(
+      new VectorSourceEvent(VectorEventType.ADDFEATURE, feature));
+  };
+
+
+  /**
+   * @param {string} featureKey Unique identifier for the feature.
+   * @param {import("../Feature.js").default} feature The feature.
+   * @private
+   */
+  VectorSource.prototype.setupChangeEvents_ = function setupChangeEvents_ (featureKey, feature) {
+    this.featureChangeKeys_[featureKey] = [
+      Object(ol_events["a" /* listen */])(feature, EventType["a" /* default */].CHANGE,
+        this.handleFeatureChange_, this),
+      Object(ol_events["a" /* listen */])(feature, ObjectEventType["a" /* default */].PROPERTYCHANGE,
+        this.handleFeatureChange_, this)
+    ];
+  };
+
+
+  /**
+   * @param {string} featureKey Unique identifier for the feature.
+   * @param {import("../Feature.js").default} feature The feature.
+   * @return {boolean} The feature is "valid", in the sense that it is also a
+   *     candidate for insertion into the Rtree.
+   * @private
+   */
+  VectorSource.prototype.addToIndex_ = function addToIndex_ (featureKey, feature) {
+    var valid = true;
+    var id = feature.getId();
+    if (id !== undefined) {
+      if (!(id.toString() in this.idIndex_)) {
+        this.idIndex_[id.toString()] = feature;
+      } else {
+        valid = false;
+      }
+    } else {
+      assert(!(featureKey in this.undefIdIndex_),
+        30); // The passed `feature` was already added to the source
+      this.undefIdIndex_[featureKey] = feature;
+    }
+    return valid;
+  };
+
+
+  /**
+   * Add a batch of features to the source.
+   * @param {Array<import("../Feature.js").default>} features Features to add.
+   * @api
+   */
+  VectorSource.prototype.addFeatures = function addFeatures (features) {
+    this.addFeaturesInternal(features);
+    this.changed();
+  };
+
+
+  /**
+   * Add features without firing a `change` event.
+   * @param {Array<import("../Feature.js").default>} features Features.
+   * @protected
+   */
+  VectorSource.prototype.addFeaturesInternal = function addFeaturesInternal (features) {
+    var extents = [];
+    var newFeatures = [];
+    var geometryFeatures = [];
+
+    for (var i = 0, length = features.length; i < length; i++) {
+      var feature = features[i];
+      var featureKey = Object(util["c" /* getUid */])(feature);
+      if (this.addToIndex_(featureKey, feature)) {
+        newFeatures.push(feature);
+      }
+    }
+
+    for (var i$1 = 0, length$1 = newFeatures.length; i$1 < length$1; i$1++) {
+      var feature$1 = newFeatures[i$1];
+      var featureKey$1 = Object(util["c" /* getUid */])(feature$1);
+      this.setupChangeEvents_(featureKey$1, feature$1);
+
+      var geometry = feature$1.getGeometry();
+      if (geometry) {
+        var extent = geometry.getExtent();
+        extents.push(extent);
+        geometryFeatures.push(feature$1);
+      } else {
+        this.nullGeometryFeatures_[featureKey$1] = feature$1;
+      }
+    }
+    if (this.featuresRtree_) {
+      this.featuresRtree_.load(extents, geometryFeatures);
+    }
+
+    for (var i$2 = 0, length$2 = newFeatures.length; i$2 < length$2; i$2++) {
+      this.dispatchEvent(new VectorSourceEvent(VectorEventType.ADDFEATURE, newFeatures[i$2]));
+    }
+  };
+
+
+  /**
+   * @param {!Collection<import("../Feature.js").default>} collection Collection.
+   * @private
+   */
+  VectorSource.prototype.bindFeaturesCollection_ = function bindFeaturesCollection_ (collection) {
+    var modifyingCollection = false;
+    Object(ol_events["a" /* listen */])(this, VectorEventType.ADDFEATURE,
+      /**
+       * @param {VectorSourceEvent} evt The vector source event
+       */
+      function(evt) {
+        if (!modifyingCollection) {
+          modifyingCollection = true;
+          collection.push(evt.feature);
+          modifyingCollection = false;
+        }
+      });
+    Object(ol_events["a" /* listen */])(this, VectorEventType.REMOVEFEATURE,
+      /**
+       * @param {VectorSourceEvent} evt The vector source event
+       */
+      function(evt) {
+        if (!modifyingCollection) {
+          modifyingCollection = true;
+          collection.remove(evt.feature);
+          modifyingCollection = false;
+        }
+      });
+    Object(ol_events["a" /* listen */])(collection, CollectionEventType.ADD,
+      /**
+       * @param {import("../Collection.js").CollectionEvent} evt The collection event
+       */
+      function(evt) {
+        if (!modifyingCollection) {
+          modifyingCollection = true;
+          this.addFeature(/** @type {import("../Feature.js").default} */ (evt.element));
+          modifyingCollection = false;
+        }
+      }, this);
+    Object(ol_events["a" /* listen */])(collection, CollectionEventType.REMOVE,
+      /**
+       * @param {import("../Collection.js").CollectionEvent} evt The collection event
+       */
+      function(evt) {
+        if (!modifyingCollection) {
+          modifyingCollection = true;
+          this.removeFeature(/** @type {import("../Feature.js").default} */ (evt.element));
+          modifyingCollection = false;
+        }
+      }, this);
+    this.featuresCollection_ = collection;
+  };
+
+
+  /**
+   * Remove all features from the source.
+   * @param {boolean=} opt_fast Skip dispatching of {@link module:ol/source/Vector.VectorSourceEvent#removefeature} events.
+   * @api
+   */
+  VectorSource.prototype.clear = function clear (opt_fast) {
+    if (opt_fast) {
+      for (var featureId in this.featureChangeKeys_) {
+        var keys = this.featureChangeKeys_[featureId];
+        keys.forEach(ol_events["e" /* unlistenByKey */]);
+      }
+      if (!this.featuresCollection_) {
+        this.featureChangeKeys_ = {};
+        this.idIndex_ = {};
+        this.undefIdIndex_ = {};
+      }
+    } else {
+      if (this.featuresRtree_) {
+        this.featuresRtree_.forEach(this.removeFeatureInternal, this);
+        for (var id in this.nullGeometryFeatures_) {
+          this.removeFeatureInternal(this.nullGeometryFeatures_[id]);
+        }
+      }
+    }
+    if (this.featuresCollection_) {
+      this.featuresCollection_.clear();
+    }
+
+    if (this.featuresRtree_) {
+      this.featuresRtree_.clear();
+    }
+    this.loadedExtentsRtree_.clear();
+    this.nullGeometryFeatures_ = {};
+
+    var clearEvent = new VectorSourceEvent(VectorEventType.CLEAR);
+    this.dispatchEvent(clearEvent);
+    this.changed();
+  };
+
+
+  /**
+   * Iterate through all features on the source, calling the provided callback
+   * with each one.  If the callback returns any "truthy" value, iteration will
+   * stop and the function will return the same value.
+   * Note: this function only iterate through the feature that have a defined geometry.
+   *
+   * @param {function(import("../Feature.js").default): T} callback Called with each feature
+   *     on the source.  Return a truthy value to stop iteration.
+   * @return {T|undefined} The return value from the last call to the callback.
+   * @template T
+   * @api
+   */
+  VectorSource.prototype.forEachFeature = function forEachFeature (callback) {
+    if (this.featuresRtree_) {
+      return this.featuresRtree_.forEach(callback);
+    } else if (this.featuresCollection_) {
+      this.featuresCollection_.forEach(callback);
+    }
+  };
+
+
+  /**
+   * Iterate through all features whose geometries contain the provided
+   * coordinate, calling the callback with each feature.  If the callback returns
+   * a "truthy" value, iteration will stop and the function will return the same
+   * value.
+   *
+   * @param {import("../coordinate.js").Coordinate} coordinate Coordinate.
+   * @param {function(import("../Feature.js").default): T} callback Called with each feature
+   *     whose goemetry contains the provided coordinate.
+   * @return {T|undefined} The return value from the last call to the callback.
+   * @template T
+   */
+  VectorSource.prototype.forEachFeatureAtCoordinateDirect = function forEachFeatureAtCoordinateDirect (coordinate, callback) {
+    var extent = [coordinate[0], coordinate[1], coordinate[0], coordinate[1]];
+    return this.forEachFeatureInExtent(extent, function(feature) {
+      var geometry = feature.getGeometry();
+      if (geometry.intersectsCoordinate(coordinate)) {
+        return callback(feature);
+      } else {
+        return undefined;
+      }
+    });
+  };
+
+
+  /**
+   * Iterate through all features whose bounding box intersects the provided
+   * extent (note that the feature's geometry may not intersect the extent),
+   * calling the callback with each feature.  If the callback returns a "truthy"
+   * value, iteration will stop and the function will return the same value.
+   *
+   * If you are interested in features whose geometry intersects an extent, call
+   * the {@link module:ol/source/Vector~VectorSource#forEachFeatureIntersectingExtent #forEachFeatureIntersectingExtent()} method instead.
+   *
+   * When `useSpatialIndex` is set to false, this method will loop through all
+   * features, equivalent to {@link module:ol/source/Vector~VectorSource#forEachFeature #forEachFeature()}.
+   *
+   * @param {import("../extent.js").Extent} extent Extent.
+   * @param {function(import("../Feature.js").default): T} callback Called with each feature
+   *     whose bounding box intersects the provided extent.
+   * @return {T|undefined} The return value from the last call to the callback.
+   * @template T
+   * @api
+   */
+  VectorSource.prototype.forEachFeatureInExtent = function forEachFeatureInExtent (extent, callback) {
+    if (this.featuresRtree_) {
+      return this.featuresRtree_.forEachInExtent(extent, callback);
+    } else if (this.featuresCollection_) {
+      this.featuresCollection_.forEach(callback);
+    }
+  };
+
+
+  /**
+   * Iterate through all features whose geometry intersects the provided extent,
+   * calling the callback with each feature.  If the callback returns a "truthy"
+   * value, iteration will stop and the function will return the same value.
+   *
+   * If you only want to test for bounding box intersection, call the
+   * {@link module:ol/source/Vector~VectorSource#forEachFeatureInExtent #forEachFeatureInExtent()} method instead.
+   *
+   * @param {import("../extent.js").Extent} extent Extent.
+   * @param {function(import("../Feature.js").default): T} callback Called with each feature
+   *     whose geometry intersects the provided extent.
+   * @return {T|undefined} The return value from the last call to the callback.
+   * @template T
+   * @api
+   */
+  VectorSource.prototype.forEachFeatureIntersectingExtent = function forEachFeatureIntersectingExtent (extent, callback) {
+    return this.forEachFeatureInExtent(extent,
+      /**
+       * @param {import("../Feature.js").default} feature Feature.
+       * @return {T|undefined} The return value from the last call to the callback.
+       */
+      function(feature) {
+        var geometry = feature.getGeometry();
+        if (geometry.intersectsExtent(extent)) {
+          var result = callback(feature);
+          if (result) {
+            return result;
+          }
+        }
+      });
+  };
+
+
+  /**
+   * Get the features collection associated with this source. Will be `null`
+   * unless the source was configured with `useSpatialIndex` set to `false`, or
+   * with an {@link module:ol/Collection} as `features`.
+   * @return {Collection<import("../Feature.js").default>} The collection of features.
+   * @api
+   */
+  VectorSource.prototype.getFeaturesCollection = function getFeaturesCollection () {
+    return this.featuresCollection_;
+  };
+
+
+  /**
+   * Get all features on the source in random order.
+   * @return {Array<import("../Feature.js").default>} Features.
+   * @api
+   */
+  VectorSource.prototype.getFeatures = function getFeatures () {
+    var features;
+    if (this.featuresCollection_) {
+      features = this.featuresCollection_.getArray();
+    } else if (this.featuresRtree_) {
+      features = this.featuresRtree_.getAll();
+      if (!Object(ol_obj["d" /* isEmpty */])(this.nullGeometryFeatures_)) {
+        extend(features, Object(ol_obj["c" /* getValues */])(this.nullGeometryFeatures_));
+      }
+    }
+    return (
+      /** @type {Array<import("../Feature.js").default>} */ (features)
+    );
+  };
+
+
+  /**
+   * Get all features whose geometry intersects the provided coordinate.
+   * @param {import("../coordinate.js").Coordinate} coordinate Coordinate.
+   * @return {Array<import("../Feature.js").default>} Features.
+   * @api
+   */
+  VectorSource.prototype.getFeaturesAtCoordinate = function getFeaturesAtCoordinate (coordinate) {
+    var features = [];
+    this.forEachFeatureAtCoordinateDirect(coordinate, function(feature) {
+      features.push(feature);
+    });
+    return features;
+  };
+
+
+  /**
+   * Get all features in the provided extent.  Note that this returns an array of
+   * all features intersecting the given extent in random order (so it may include
+   * features whose geometries do not intersect the extent).
+   *
+   * This method is not available when the source is configured with
+   * `useSpatialIndex` set to `false`.
+   * @param {import("../extent.js").Extent} extent Extent.
+   * @return {Array<import("../Feature.js").default>} Features.
+   * @api
+   */
+  VectorSource.prototype.getFeaturesInExtent = function getFeaturesInExtent (extent) {
+    return this.featuresRtree_.getInExtent(extent);
+  };
+
+
+  /**
+   * Get the closest feature to the provided coordinate.
+   *
+   * This method is not available when the source is configured with
+   * `useSpatialIndex` set to `false`.
+   * @param {import("../coordinate.js").Coordinate} coordinate Coordinate.
+   * @param {function(import("../Feature.js").default):boolean=} opt_filter Feature filter function.
+   *     The filter function will receive one argument, the {@link module:ol/Feature feature}
+   *     and it should return a boolean value. By default, no filtering is made.
+   * @return {import("../Feature.js").default} Closest feature.
+   * @api
+   */
+  VectorSource.prototype.getClosestFeatureToCoordinate = function getClosestFeatureToCoordinate (coordinate, opt_filter) {
+    // Find the closest feature using branch and bound.  We start searching an
+    // infinite extent, and find the distance from the first feature found.  This
+    // becomes the closest feature.  We then compute a smaller extent which any
+    // closer feature must intersect.  We continue searching with this smaller
+    // extent, trying to find a closer feature.  Every time we find a closer
+    // feature, we update the extent being searched so that any even closer
+    // feature must intersect it.  We continue until we run out of features.
+    var x = coordinate[0];
+    var y = coordinate[1];
+    var closestFeature = null;
+    var closestPoint = [NaN, NaN];
+    var minSquaredDistance = Infinity;
+    var extent = [-Infinity, -Infinity, Infinity, Infinity];
+    var filter = opt_filter ? opt_filter : functions["b" /* TRUE */];
+    this.featuresRtree_.forEachInExtent(extent,
+      /**
+       * @param {import("../Feature.js").default} feature Feature.
+       */
+      function(feature) {
+        if (filter(feature)) {
+          var geometry = feature.getGeometry();
+          var previousMinSquaredDistance = minSquaredDistance;
+          minSquaredDistance = geometry.closestPointXY(
+            x, y, closestPoint, minSquaredDistance);
+          if (minSquaredDistance < previousMinSquaredDistance) {
+            closestFeature = feature;
+            // This is sneaky.  Reduce the extent that it is currently being
+            // searched while the R-Tree traversal using this same extent object
+            // is still in progress.  This is safe because the new extent is
+            // strictly contained by the old extent.
+            var minDistance = Math.sqrt(minSquaredDistance);
+            extent[0] = x - minDistance;
+            extent[1] = y - minDistance;
+            extent[2] = x + minDistance;
+            extent[3] = y + minDistance;
+          }
+        }
+      });
+    return closestFeature;
+  };
+
+
+  /**
+   * Get the extent of the features currently in the source.
+   *
+   * This method is not available when the source is configured with
+   * `useSpatialIndex` set to `false`.
+   * @param {import("../extent.js").Extent=} opt_extent Destination extent. If provided, no new extent
+   *     will be created. Instead, that extent's coordinates will be overwritten.
+   * @return {import("../extent.js").Extent} Extent.
+   * @api
+   */
+  VectorSource.prototype.getExtent = function getExtent (opt_extent) {
+    return this.featuresRtree_.getExtent(opt_extent);
+  };
+
+
+  /**
+   * Get a feature by its identifier (the value returned by feature.getId()).
+   * Note that the index treats string and numeric identifiers as the same.  So
+   * `source.getFeatureById(2)` will return a feature with id `'2'` or `2`.
+   *
+   * @param {string|number} id Feature identifier.
+   * @return {import("../Feature.js").default} The feature (or `null` if not found).
+   * @api
+   */
+  VectorSource.prototype.getFeatureById = function getFeatureById (id) {
+    var feature = this.idIndex_[id.toString()];
+    return feature !== undefined ? feature : null;
+  };
+
+
+  /**
+   * Get the format associated with this source.
+   *
+   * @return {import("../format/Feature.js").default|undefined} The feature format.
+   * @api
+   */
+  VectorSource.prototype.getFormat = function getFormat () {
+    return this.format_;
+  };
+
+
+  /**
+   * @return {boolean} The source can have overlapping geometries.
+   */
+  VectorSource.prototype.getOverlaps = function getOverlaps () {
+    return this.overlaps_;
+  };
+
+
+  /**
+   * Get the url associated with this source.
+   *
+   * @return {string|import("../featureloader.js").FeatureUrlFunction|undefined} The url.
+   * @api
+   */
+  VectorSource.prototype.getUrl = function getUrl () {
+    return this.url_;
+  };
+
+
+  /**
+   * @param {Event} event Event.
+   * @private
+   */
+  VectorSource.prototype.handleFeatureChange_ = function handleFeatureChange_ (event) {
+    var feature = /** @type {import("../Feature.js").default} */ (event.target);
+    var featureKey = Object(util["c" /* getUid */])(feature);
+    var geometry = feature.getGeometry();
+    if (!geometry) {
+      if (!(featureKey in this.nullGeometryFeatures_)) {
+        if (this.featuresRtree_) {
+          this.featuresRtree_.remove(feature);
+        }
+        this.nullGeometryFeatures_[featureKey] = feature;
+      }
+    } else {
+      var extent = geometry.getExtent();
+      if (featureKey in this.nullGeometryFeatures_) {
+        delete this.nullGeometryFeatures_[featureKey];
+        if (this.featuresRtree_) {
+          this.featuresRtree_.insert(extent, feature);
+        }
+      } else {
+        if (this.featuresRtree_) {
+          this.featuresRtree_.update(extent, feature);
+        }
+      }
+    }
+    var id = feature.getId();
+    if (id !== undefined) {
+      var sid = id.toString();
+      if (featureKey in this.undefIdIndex_) {
+        delete this.undefIdIndex_[featureKey];
+        this.idIndex_[sid] = feature;
+      } else {
+        if (this.idIndex_[sid] !== feature) {
+          this.removeFromIdIndex_(feature);
+          this.idIndex_[sid] = feature;
+        }
+      }
+    } else {
+      if (!(featureKey in this.undefIdIndex_)) {
+        this.removeFromIdIndex_(feature);
+        this.undefIdIndex_[featureKey] = feature;
+      }
+    }
+    this.changed();
+    this.dispatchEvent(new VectorSourceEvent(
+      VectorEventType.CHANGEFEATURE, feature));
+  };
+
+  /**
+   * Returns true if the feature is contained within the source.
+   * @param {import("../Feature.js").default} feature Feature.
+   * @return {boolean} Has feature.
+   * @api
+   */
+  VectorSource.prototype.hasFeature = function hasFeature (feature) {
+    var id = feature.getId();
+    if (id !== undefined) {
+      return id in this.idIndex_;
+    } else {
+      return Object(util["c" /* getUid */])(feature) in this.undefIdIndex_;
+    }
+  };
+
+  /**
+   * @return {boolean} Is empty.
+   */
+  VectorSource.prototype.isEmpty = function isEmpty$1 () {
+    return this.featuresRtree_.isEmpty() && Object(ol_obj["d" /* isEmpty */])(this.nullGeometryFeatures_);
+  };
+
+
+  /**
+   * @param {import("../extent.js").Extent} extent Extent.
+   * @param {number} resolution Resolution.
+   * @param {import("../proj/Projection.js").default} projection Projection.
+   */
+  VectorSource.prototype.loadFeatures = function loadFeatures (extent, resolution, projection) {
+    var this$1 = this;
+
+    var loadedExtentsRtree = this.loadedExtentsRtree_;
+    var extentsToLoad = this.strategy_(extent, resolution);
+    this.loading = false;
+    var loop = function ( i, ii ) {
+      var extentToLoad = extentsToLoad[i];
+      var alreadyLoaded = loadedExtentsRtree.forEachInExtent(extentToLoad,
+        /**
+         * @param {{extent: import("../extent.js").Extent}} object Object.
+         * @return {boolean} Contains.
+         */
+        function(object) {
+          return containsExtent(object.extent, extentToLoad);
+        });
+      if (!alreadyLoaded) {
+        this$1.loader_.call(this$1, extentToLoad, resolution, projection);
+        loadedExtentsRtree.insert(extentToLoad, {extent: extentToLoad.slice()});
+        this$1.loading = this$1.loader_ !== functions["c" /* VOID */];
+      }
+    };
+
+    for (var i = 0, ii = extentsToLoad.length; i < ii; ++i) loop( i, ii );
+  };
+
+
+  /**
+   * Remove an extent from the list of loaded extents.
+   * @param {import("../extent.js").Extent} extent Extent.
+   * @api
+   */
+  VectorSource.prototype.removeLoadedExtent = function removeLoadedExtent (extent) {
+    var loadedExtentsRtree = this.loadedExtentsRtree_;
+    var obj;
+    loadedExtentsRtree.forEachInExtent(extent, function(object) {
+      if (extent_equals(object.extent, extent)) {
+        obj = object;
+        return true;
+      }
+    });
+    if (obj) {
+      loadedExtentsRtree.remove(obj);
+    }
+  };
+
+
+  /**
+   * Remove a single feature from the source.  If you want to remove all features
+   * at once, use the {@link module:ol/source/Vector~VectorSource#clear #clear()} method
+   * instead.
+   * @param {import("../Feature.js").default} feature Feature to remove.
+   * @api
+   */
+  VectorSource.prototype.removeFeature = function removeFeature (feature) {
+    var featureKey = Object(util["c" /* getUid */])(feature);
+    if (featureKey in this.nullGeometryFeatures_) {
+      delete this.nullGeometryFeatures_[featureKey];
+    } else {
+      if (this.featuresRtree_) {
+        this.featuresRtree_.remove(feature);
+      }
+    }
+    this.removeFeatureInternal(feature);
+    this.changed();
+  };
+
+
+  /**
+   * Remove feature without firing a `change` event.
+   * @param {import("../Feature.js").default} feature Feature.
+   * @protected
+   */
+  VectorSource.prototype.removeFeatureInternal = function removeFeatureInternal (feature) {
+    var featureKey = Object(util["c" /* getUid */])(feature);
+    this.featureChangeKeys_[featureKey].forEach(ol_events["e" /* unlistenByKey */]);
+    delete this.featureChangeKeys_[featureKey];
+    var id = feature.getId();
+    if (id !== undefined) {
+      delete this.idIndex_[id.toString()];
+    } else {
+      delete this.undefIdIndex_[featureKey];
+    }
+    this.dispatchEvent(new VectorSourceEvent(
+      VectorEventType.REMOVEFEATURE, feature));
+  };
+
+
+  /**
+   * Remove a feature from the id index.  Called internally when the feature id
+   * may have changed.
+   * @param {import("../Feature.js").default} feature The feature.
+   * @return {boolean} Removed the feature from the index.
+   * @private
+   */
+  VectorSource.prototype.removeFromIdIndex_ = function removeFromIdIndex_ (feature) {
+    var removed = false;
+    for (var id in this.idIndex_) {
+      if (this.idIndex_[id] === feature) {
+        delete this.idIndex_[id];
+        removed = true;
+        break;
+      }
+    }
+    return removed;
+  };
+
+
+  /**
+   * Set the new loader of the source. The next loadFeatures call will use the
+   * new loader.
+   * @param {import("../featureloader.js").FeatureLoader} loader The loader to set.
+   * @api
+   */
+  VectorSource.prototype.setLoader = function setLoader (loader) {
+    this.loader_ = loader;
+  };
+
+  return VectorSource;
+}(source_Source));
+
+
+/* harmony default export */ var Vector = (Vector_VectorSource);
+
+//# sourceMappingURL=Vector.js.map
+// CONCATENATED MODULE: ./node_modules/ol/OverlayPositioning.js
+/**
+ * @module ol/OverlayPositioning
+ */
+
+/**
+ * Overlay position: `'bottom-left'`, `'bottom-center'`,  `'bottom-right'`,
+ * `'center-left'`, `'center-center'`, `'center-right'`, `'top-left'`,
+ * `'top-center'`, `'top-right'`
+ * @enum {string}
+ */
+/* harmony default export */ var OverlayPositioning = ({
+  BOTTOM_LEFT: 'bottom-left',
+  BOTTOM_CENTER: 'bottom-center',
+  BOTTOM_RIGHT: 'bottom-right',
+  CENTER_LEFT: 'center-left',
+  CENTER_CENTER: 'center-center',
+  CENTER_RIGHT: 'center-right',
+  TOP_LEFT: 'top-left',
+  TOP_CENTER: 'top-center',
+  TOP_RIGHT: 'top-right'
+});
+
+//# sourceMappingURL=OverlayPositioning.js.map
+// CONCATENATED MODULE: ./node_modules/ol/Overlay.js
+/**
+ * @module ol/Overlay
+ */
+
+
+
+
+
+
+
+
+
+/**
+ * @typedef {Object} Options
+ * @property {number|string} [id] Set the overlay id. The overlay id can be used
+ * with the {@link module:ol/Map~Map#getOverlayById} method.
+ * @property {HTMLElement} [element] The overlay element.
+ * @property {Array<number>} [offset=[0, 0]] Offsets in pixels used when positioning
+ * the overlay. The first element in the
+ * array is the horizontal offset. A positive value shifts the overlay right.
+ * The second element in the array is the vertical offset. A positive value
+ * shifts the overlay down.
+ * @property {import("./coordinate.js").Coordinate} [position] The overlay position
+ * in map projection.
+ * @property {OverlayPositioning} [positioning='top-left'] Defines how
+ * the overlay is actually positioned with respect to its `position` property.
+ * Possible values are `'bottom-left'`, `'bottom-center'`, `'bottom-right'`,
+ * `'center-left'`, `'center-center'`, `'center-right'`, `'top-left'`,
+ * `'top-center'`, and `'top-right'`.
+ * @property {boolean} [stopEvent=true] Whether event propagation to the map
+ * viewport should be stopped. If `true` the overlay is placed in the same
+ * container as that of the controls (CSS class name
+ * `ol-overlaycontainer-stopevent`); if `false` it is placed in the container
+ * with CSS class name specified by the `className` property.
+ * @property {boolean} [insertFirst=true] Whether the overlay is inserted first
+ * in the overlay container, or appended. If the overlay is placed in the same
+ * container as that of the controls (see the `stopEvent` option) you will
+ * probably set `insertFirst` to `true` so the overlay is displayed below the
+ * controls.
+ * @property {boolean} [autoPan=false] If set to `true` the map is panned when
+ * calling `setPosition`, so that the overlay is entirely visible in the current
+ * viewport.
+ * @property {PanOptions} [autoPanAnimation] The
+ * animation options used to pan the overlay into view. This animation is only
+ * used when `autoPan` is enabled. A `duration` and `easing` may be provided to
+ * customize the animation.
+ * @property {number} [autoPanMargin=20] The margin (in pixels) between the
+ * overlay and the borders of the map when autopanning.
+ * @property {string} [className='ol-overlay-container ol-selectable'] CSS class
+ * name.
+ */
+
+
+/**
+ * @typedef {Object} PanOptions
+ * @property {number} [duration=1000] The duration of the animation in
+ * milliseconds.
+ * @property {function(number):number} [easing] The easing function to use. Can
+ * be one from {@link module:ol/easing} or a custom function.
+ * Default is {@link module:ol/easing~inAndOut}.
+ */
+
+
+/**
+ * @enum {string}
+ * @protected
+ */
+var Overlay_Property = {
+  ELEMENT: 'element',
+  MAP: 'map',
+  OFFSET: 'offset',
+  POSITION: 'position',
+  POSITIONING: 'positioning'
+};
+
+
+/**
+ * @classdesc
+ * An element to be displayed over the map and attached to a single map
+ * location.  Like {@link module:ol/control/Control~Control}, Overlays are
+ * visible widgets. Unlike Controls, they are not in a fixed position on the
+ * screen, but are tied to a geographical coordinate, so panning the map will
+ * move an Overlay but not a Control.
+ *
+ * Example:
+ *
+ *     import Overlay from 'ol/Overlay';
+ *
+ *     var popup = new Overlay({
+ *       element: document.getElementById('popup')
+ *     });
+ *     popup.setPosition(coordinate);
+ *     map.addOverlay(popup);
+ *
+ * @api
+ */
+var Overlay_Overlay = /*@__PURE__*/(function (BaseObject) {
+  function Overlay(options) {
+
+    BaseObject.call(this);
+
+    /**
+     * @protected
+     * @type {Options}
+     */
+    this.options = options;
+
+    /**
+     * @protected
+     * @type {number|string|undefined}
+     */
+    this.id = options.id;
+
+    /**
+     * @protected
+     * @type {boolean}
+     */
+    this.insertFirst = options.insertFirst !== undefined ?
+      options.insertFirst : true;
+
+    /**
+     * @protected
+     * @type {boolean}
+     */
+    this.stopEvent = options.stopEvent !== undefined ? options.stopEvent : true;
+
+    /**
+     * @protected
+     * @type {HTMLElement}
+     */
+    this.element = document.createElement('div');
+    this.element.className = options.className !== undefined ?
+      options.className : 'ol-overlay-container ' + CLASS_SELECTABLE;
+    this.element.style.position = 'absolute';
+
+    /**
+     * @protected
+     * @type {boolean}
+     */
+    this.autoPan = options.autoPan !== undefined ? options.autoPan : false;
+
+    /**
+     * @protected
+     * @type {PanOptions}
+     */
+    this.autoPanAnimation = options.autoPanAnimation || /** @type {PanOptions} */ ({});
+
+    /**
+     * @protected
+     * @type {number}
+     */
+    this.autoPanMargin = options.autoPanMargin !== undefined ?
+      options.autoPanMargin : 20;
+
+    /**
+     * @protected
+     * @type {{bottom_: string,
+     *         left_: string,
+     *         right_: string,
+     *         top_: string,
+     *         visible: boolean}}
+     */
+    this.rendered = {
+      bottom_: '',
+      left_: '',
+      right_: '',
+      top_: '',
+      visible: true
+    };
+
+    /**
+     * @protected
+     * @type {?import("./events.js").EventsKey}
+     */
+    this.mapPostrenderListenerKey = null;
+
+    Object(ol_events["a" /* listen */])(
+      this, Object(ol_Object["b" /* getChangeEventType */])(Overlay_Property.ELEMENT),
+      this.handleElementChanged, this);
+
+    Object(ol_events["a" /* listen */])(
+      this, Object(ol_Object["b" /* getChangeEventType */])(Overlay_Property.MAP),
+      this.handleMapChanged, this);
+
+    Object(ol_events["a" /* listen */])(
+      this, Object(ol_Object["b" /* getChangeEventType */])(Overlay_Property.OFFSET),
+      this.handleOffsetChanged, this);
+
+    Object(ol_events["a" /* listen */])(
+      this, Object(ol_Object["b" /* getChangeEventType */])(Overlay_Property.POSITION),
+      this.handlePositionChanged, this);
+
+    Object(ol_events["a" /* listen */])(
+      this, Object(ol_Object["b" /* getChangeEventType */])(Overlay_Property.POSITIONING),
+      this.handlePositioningChanged, this);
+
+    if (options.element !== undefined) {
+      this.setElement(options.element);
+    }
+
+    this.setOffset(options.offset !== undefined ? options.offset : [0, 0]);
+
+    this.setPositioning(options.positioning !== undefined ?
+      /** @type {OverlayPositioning} */ (options.positioning) :
+      OverlayPositioning.TOP_LEFT);
+
+    if (options.position !== undefined) {
+      this.setPosition(options.position);
+    }
+
+  }
+
+  if ( BaseObject ) Overlay.__proto__ = BaseObject;
+  Overlay.prototype = Object.create( BaseObject && BaseObject.prototype );
+  Overlay.prototype.constructor = Overlay;
+
+  /**
+   * Get the DOM element of this overlay.
+   * @return {HTMLElement|undefined} The Element containing the overlay.
+   * @observable
+   * @api
+   */
+  Overlay.prototype.getElement = function getElement () {
+    return /** @type {HTMLElement|undefined} */ (this.get(Overlay_Property.ELEMENT));
+  };
+
+  /**
+   * Get the overlay identifier which is set on constructor.
+   * @return {number|string|undefined} Id.
+   * @api
+   */
+  Overlay.prototype.getId = function getId () {
+    return this.id;
+  };
+
+  /**
+   * Get the map associated with this overlay.
+   * @return {import("./PluggableMap.js").default|undefined} The map that the
+   * overlay is part of.
+   * @observable
+   * @api
+   */
+  Overlay.prototype.getMap = function getMap () {
+    return (
+      /** @type {import("./PluggableMap.js").default|undefined} */ (this.get(Overlay_Property.MAP))
+    );
+  };
+
+  /**
+   * Get the offset of this overlay.
+   * @return {Array<number>} The offset.
+   * @observable
+   * @api
+   */
+  Overlay.prototype.getOffset = function getOffset () {
+    return /** @type {Array<number>} */ (this.get(Overlay_Property.OFFSET));
+  };
+
+  /**
+   * Get the current position of this overlay.
+   * @return {import("./coordinate.js").Coordinate|undefined} The spatial point that the overlay is
+   *     anchored at.
+   * @observable
+   * @api
+   */
+  Overlay.prototype.getPosition = function getPosition () {
+    return (
+      /** @type {import("./coordinate.js").Coordinate|undefined} */ (this.get(Overlay_Property.POSITION))
+    );
+  };
+
+  /**
+   * Get the current positioning of this overlay.
+   * @return {OverlayPositioning} How the overlay is positioned
+   *     relative to its point on the map.
+   * @observable
+   * @api
+   */
+  Overlay.prototype.getPositioning = function getPositioning () {
+    return (
+      /** @type {OverlayPositioning} */ (this.get(Overlay_Property.POSITIONING))
+    );
+  };
+
+  /**
+   * @protected
+   */
+  Overlay.prototype.handleElementChanged = function handleElementChanged () {
+    Object(dom["d" /* removeChildren */])(this.element);
+    var element = this.getElement();
+    if (element) {
+      this.element.appendChild(element);
+    }
+  };
+
+  /**
+   * @protected
+   */
+  Overlay.prototype.handleMapChanged = function handleMapChanged () {
+    if (this.mapPostrenderListenerKey) {
+      Object(dom["e" /* removeNode */])(this.element);
+      Object(ol_events["e" /* unlistenByKey */])(this.mapPostrenderListenerKey);
+      this.mapPostrenderListenerKey = null;
+    }
+    var map = this.getMap();
+    if (map) {
+      this.mapPostrenderListenerKey = Object(ol_events["a" /* listen */])(map,
+        MapEventType["a" /* default */].POSTRENDER, this.render, this);
+      this.updatePixelPosition();
+      var container = this.stopEvent ?
+        map.getOverlayContainerStopEvent() : map.getOverlayContainer();
+      if (this.insertFirst) {
+        container.insertBefore(this.element, container.childNodes[0] || null);
+      } else {
+        container.appendChild(this.element);
+      }
+    }
+  };
+
+  /**
+   * @protected
+   */
+  Overlay.prototype.render = function render () {
+    this.updatePixelPosition();
+  };
+
+  /**
+   * @protected
+   */
+  Overlay.prototype.handleOffsetChanged = function handleOffsetChanged () {
+    this.updatePixelPosition();
+  };
+
+  /**
+   * @protected
+   */
+  Overlay.prototype.handlePositionChanged = function handlePositionChanged () {
+    this.updatePixelPosition();
+    if (this.get(Overlay_Property.POSITION) && this.autoPan) {
+      this.panIntoView();
+    }
+  };
+
+  /**
+   * @protected
+   */
+  Overlay.prototype.handlePositioningChanged = function handlePositioningChanged () {
+    this.updatePixelPosition();
+  };
+
+  /**
+   * Set the DOM element to be associated with this overlay.
+   * @param {HTMLElement|undefined} element The Element containing the overlay.
+   * @observable
+   * @api
+   */
+  Overlay.prototype.setElement = function setElement (element) {
+    this.set(Overlay_Property.ELEMENT, element);
+  };
+
+  /**
+   * Set the map to be associated with this overlay.
+   * @param {import("./PluggableMap.js").default|undefined} map The map that the
+   * overlay is part of.
+   * @observable
+   * @api
+   */
+  Overlay.prototype.setMap = function setMap (map) {
+    this.set(Overlay_Property.MAP, map);
+  };
+
+  /**
+   * Set the offset for this overlay.
+   * @param {Array<number>} offset Offset.
+   * @observable
+   * @api
+   */
+  Overlay.prototype.setOffset = function setOffset (offset) {
+    this.set(Overlay_Property.OFFSET, offset);
+  };
+
+  /**
+   * Set the position for this overlay. If the position is `undefined` the
+   * overlay is hidden.
+   * @param {import("./coordinate.js").Coordinate|undefined} position The spatial point that the overlay
+   *     is anchored at.
+   * @observable
+   * @api
+   */
+  Overlay.prototype.setPosition = function setPosition (position) {
+    this.set(Overlay_Property.POSITION, position);
+  };
+
+  /**
+   * Pan the map so that the overlay is entirely visible in the current viewport
+   * (if necessary).
+   * @protected
+   */
+  Overlay.prototype.panIntoView = function panIntoView () {
+    var map = this.getMap();
+
+    if (!map || !map.getTargetElement()) {
+      return;
+    }
+
+    var mapRect = this.getRect(map.getTargetElement(), map.getSize());
+    var element = this.getElement();
+    var overlayRect = this.getRect(element, [Object(dom["c" /* outerWidth */])(element), Object(dom["b" /* outerHeight */])(element)]);
+
+    var margin = this.autoPanMargin;
+    if (!containsExtent(mapRect, overlayRect)) {
+      // the overlay is not completely inside the viewport, so pan the map
+      var offsetLeft = overlayRect[0] - mapRect[0];
+      var offsetRight = mapRect[2] - overlayRect[2];
+      var offsetTop = overlayRect[1] - mapRect[1];
+      var offsetBottom = mapRect[3] - overlayRect[3];
+
+      var delta = [0, 0];
+      if (offsetLeft < 0) {
+        // move map to the left
+        delta[0] = offsetLeft - margin;
+      } else if (offsetRight < 0) {
+        // move map to the right
+        delta[0] = Math.abs(offsetRight) + margin;
+      }
+      if (offsetTop < 0) {
+        // move map up
+        delta[1] = offsetTop - margin;
+      } else if (offsetBottom < 0) {
+        // move map down
+        delta[1] = Math.abs(offsetBottom) + margin;
+      }
+
+      if (delta[0] !== 0 || delta[1] !== 0) {
+        var center = /** @type {import("./coordinate.js").Coordinate} */ (map.getView().getCenter());
+        var centerPx = map.getPixelFromCoordinate(center);
+        var newCenterPx = [
+          centerPx[0] + delta[0],
+          centerPx[1] + delta[1]
+        ];
+
+        map.getView().animate({
+          center: map.getCoordinateFromPixel(newCenterPx),
+          duration: this.autoPanAnimation.duration,
+          easing: this.autoPanAnimation.easing
+        });
+      }
+    }
+  };
+
+  /**
+   * Get the extent of an element relative to the document
+   * @param {HTMLElement|undefined} element The element.
+   * @param {import("./size.js").Size|undefined} size The size of the element.
+   * @return {import("./extent.js").Extent} The extent.
+   * @protected
+   */
+  Overlay.prototype.getRect = function getRect (element, size) {
+    var box = element.getBoundingClientRect();
+    var offsetX = box.left + window.pageXOffset;
+    var offsetY = box.top + window.pageYOffset;
+    return [
+      offsetX,
+      offsetY,
+      offsetX + size[0],
+      offsetY + size[1]
+    ];
+  };
+
+  /**
+   * Set the positioning for this overlay.
+   * @param {OverlayPositioning} positioning how the overlay is
+   *     positioned relative to its point on the map.
+   * @observable
+   * @api
+   */
+  Overlay.prototype.setPositioning = function setPositioning (positioning) {
+    this.set(Overlay_Property.POSITIONING, positioning);
+  };
+
+  /**
+   * Modify the visibility of the element.
+   * @param {boolean} visible Element visibility.
+   * @protected
+   */
+  Overlay.prototype.setVisible = function setVisible (visible) {
+    if (this.rendered.visible !== visible) {
+      this.element.style.display = visible ? '' : 'none';
+      this.rendered.visible = visible;
+    }
+  };
+
+  /**
+   * Update pixel position.
+   * @protected
+   */
+  Overlay.prototype.updatePixelPosition = function updatePixelPosition () {
+    var map = this.getMap();
+    var position = this.getPosition();
+    if (!map || !map.isRendered() || !position) {
+      this.setVisible(false);
+      return;
+    }
+
+    var pixel = map.getPixelFromCoordinate(position);
+    var mapSize = map.getSize();
+    this.updateRenderedPosition(pixel, mapSize);
+  };
+
+  /**
+   * @param {import("./pixel.js").Pixel} pixel The pixel location.
+   * @param {import("./size.js").Size|undefined} mapSize The map size.
+   * @protected
+   */
+  Overlay.prototype.updateRenderedPosition = function updateRenderedPosition (pixel, mapSize) {
+    var style = this.element.style;
+    var offset = this.getOffset();
+
+    var positioning = this.getPositioning();
+
+    this.setVisible(true);
+
+    var offsetX = offset[0];
+    var offsetY = offset[1];
+    if (positioning == OverlayPositioning.BOTTOM_RIGHT ||
+        positioning == OverlayPositioning.CENTER_RIGHT ||
+        positioning == OverlayPositioning.TOP_RIGHT) {
+      if (this.rendered.left_ !== '') {
+        this.rendered.left_ = style.left = '';
+      }
+      var right = Math.round(mapSize[0] - pixel[0] - offsetX) + 'px';
+      if (this.rendered.right_ != right) {
+        this.rendered.right_ = style.right = right;
+      }
+    } else {
+      if (this.rendered.right_ !== '') {
+        this.rendered.right_ = style.right = '';
+      }
+      if (positioning == OverlayPositioning.BOTTOM_CENTER ||
+          positioning == OverlayPositioning.CENTER_CENTER ||
+          positioning == OverlayPositioning.TOP_CENTER) {
+        offsetX -= this.element.offsetWidth / 2;
+      }
+      var left = Math.round(pixel[0] + offsetX) + 'px';
+      if (this.rendered.left_ != left) {
+        this.rendered.left_ = style.left = left;
+      }
+    }
+    if (positioning == OverlayPositioning.BOTTOM_LEFT ||
+        positioning == OverlayPositioning.BOTTOM_CENTER ||
+        positioning == OverlayPositioning.BOTTOM_RIGHT) {
+      if (this.rendered.top_ !== '') {
+        this.rendered.top_ = style.top = '';
+      }
+      var bottom = Math.round(mapSize[1] - pixel[1] - offsetY) + 'px';
+      if (this.rendered.bottom_ != bottom) {
+        this.rendered.bottom_ = style.bottom = bottom;
+      }
+    } else {
+      if (this.rendered.bottom_ !== '') {
+        this.rendered.bottom_ = style.bottom = '';
+      }
+      if (positioning == OverlayPositioning.CENTER_LEFT ||
+          positioning == OverlayPositioning.CENTER_CENTER ||
+          positioning == OverlayPositioning.CENTER_RIGHT) {
+        offsetY -= this.element.offsetHeight / 2;
+      }
+      var top = Math.round(pixel[1] + offsetY) + 'px';
+      if (this.rendered.top_ != top) {
+        this.rendered.top_ = style.top = top;
+      }
+    }
+  };
+
+  /**
+   * returns the options this Overlay has been created with
+   * @return {Options} overlay options
+   */
+  Overlay.prototype.getOptions = function getOptions () {
+    return this.options;
+  };
+
+  return Overlay;
+}(ol_Object["a" /* default */]));
+
+
+/* harmony default export */ var ol_Overlay = (Overlay_Overlay);
+
+//# sourceMappingURL=Overlay.js.map
+// CONCATENATED MODULE: ./node_modules/ol/geom/flat/interpolate.js
+/**
+ * @module ol/geom/flat/interpolate
+ */
+
+
+
+
+/**
+ * @param {Array<number>} flatCoordinates Flat coordinates.
+ * @param {number} offset Offset.
+ * @param {number} end End.
+ * @param {number} stride Stride.
+ * @param {number} fraction Fraction.
+ * @param {Array<number>=} opt_dest Destination.
+ * @return {Array<number>} Destination.
+ */
+function interpolatePoint(flatCoordinates, offset, end, stride, fraction, opt_dest) {
+  var pointX = NaN;
+  var pointY = NaN;
+  var n = (end - offset) / stride;
+  if (n === 1) {
+    pointX = flatCoordinates[offset];
+    pointY = flatCoordinates[offset + 1];
+  } else if (n == 2) {
+    pointX = (1 - fraction) * flatCoordinates[offset] +
+        fraction * flatCoordinates[offset + stride];
+    pointY = (1 - fraction) * flatCoordinates[offset + 1] +
+        fraction * flatCoordinates[offset + stride + 1];
+  } else if (n !== 0) {
+    var x1 = flatCoordinates[offset];
+    var y1 = flatCoordinates[offset + 1];
+    var length = 0;
+    var cumulativeLengths = [0];
+    for (var i = offset + stride; i < end; i += stride) {
+      var x2 = flatCoordinates[i];
+      var y2 = flatCoordinates[i + 1];
+      length += Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));
+      cumulativeLengths.push(length);
+      x1 = x2;
+      y1 = y2;
+    }
+    var target = fraction * length;
+    var index = binarySearch(cumulativeLengths, target);
+    if (index < 0) {
+      var t = (target - cumulativeLengths[-index - 2]) /
+          (cumulativeLengths[-index - 1] - cumulativeLengths[-index - 2]);
+      var o = offset + (-index - 2) * stride;
+      pointX = lerp(
+        flatCoordinates[o], flatCoordinates[o + stride], t);
+      pointY = lerp(
+        flatCoordinates[o + 1], flatCoordinates[o + stride + 1], t);
+    } else {
+      pointX = flatCoordinates[offset + index * stride];
+      pointY = flatCoordinates[offset + index * stride + 1];
+    }
+  }
+  if (opt_dest) {
+    opt_dest[0] = pointX;
+    opt_dest[1] = pointY;
+    return opt_dest;
+  } else {
+    return [pointX, pointY];
+  }
+}
+
+
+/**
+ * @param {Array<number>} flatCoordinates Flat coordinates.
+ * @param {number} offset Offset.
+ * @param {number} end End.
+ * @param {number} stride Stride.
+ * @param {number} m M.
+ * @param {boolean} extrapolate Extrapolate.
+ * @return {import("../../coordinate.js").Coordinate} Coordinate.
+ */
+function lineStringCoordinateAtM(flatCoordinates, offset, end, stride, m, extrapolate) {
+  if (end == offset) {
+    return null;
+  }
+  var coordinate;
+  if (m < flatCoordinates[offset + stride - 1]) {
+    if (extrapolate) {
+      coordinate = flatCoordinates.slice(offset, offset + stride);
+      coordinate[stride - 1] = m;
+      return coordinate;
+    } else {
+      return null;
+    }
+  } else if (flatCoordinates[end - 1] < m) {
+    if (extrapolate) {
+      coordinate = flatCoordinates.slice(end - stride, end);
+      coordinate[stride - 1] = m;
+      return coordinate;
+    } else {
+      return null;
+    }
+  }
+  // FIXME use O(1) search
+  if (m == flatCoordinates[offset + stride - 1]) {
+    return flatCoordinates.slice(offset, offset + stride);
+  }
+  var lo = offset / stride;
+  var hi = end / stride;
+  while (lo < hi) {
+    var mid = (lo + hi) >> 1;
+    if (m < flatCoordinates[(mid + 1) * stride - 1]) {
+      hi = mid;
+    } else {
+      lo = mid + 1;
+    }
+  }
+  var m0 = flatCoordinates[lo * stride - 1];
+  if (m == m0) {
+    return flatCoordinates.slice((lo - 1) * stride, (lo - 1) * stride + stride);
+  }
+  var m1 = flatCoordinates[(lo + 1) * stride - 1];
+  var t = (m - m0) / (m1 - m0);
+  coordinate = [];
+  for (var i = 0; i < stride - 1; ++i) {
+    coordinate.push(lerp(flatCoordinates[(lo - 1) * stride + i],
+      flatCoordinates[lo * stride + i], t));
+  }
+  coordinate.push(m);
+  return coordinate;
+}
+
+
+/**
+ * @param {Array<number>} flatCoordinates Flat coordinates.
+ * @param {number} offset Offset.
+ * @param {Array<number>} ends Ends.
+ * @param {number} stride Stride.
+ * @param {number} m M.
+ * @param {boolean} extrapolate Extrapolate.
+ * @param {boolean} interpolate Interpolate.
+ * @return {import("../../coordinate.js").Coordinate} Coordinate.
+ */
+function lineStringsCoordinateAtM(
+  flatCoordinates, offset, ends, stride, m, extrapolate, interpolate) {
+  if (interpolate) {
+    return lineStringCoordinateAtM(
+      flatCoordinates, offset, ends[ends.length - 1], stride, m, extrapolate);
+  }
+  var coordinate;
+  if (m < flatCoordinates[stride - 1]) {
+    if (extrapolate) {
+      coordinate = flatCoordinates.slice(0, stride);
+      coordinate[stride - 1] = m;
+      return coordinate;
+    } else {
+      return null;
+    }
+  }
+  if (flatCoordinates[flatCoordinates.length - 1] < m) {
+    if (extrapolate) {
+      coordinate = flatCoordinates.slice(flatCoordinates.length - stride);
+      coordinate[stride - 1] = m;
+      return coordinate;
+    } else {
+      return null;
+    }
+  }
+  for (var i = 0, ii = ends.length; i < ii; ++i) {
+    var end = ends[i];
+    if (offset == end) {
+      continue;
+    }
+    if (m < flatCoordinates[offset + stride - 1]) {
+      return null;
+    } else if (m <= flatCoordinates[end - 1]) {
+      return lineStringCoordinateAtM(
+        flatCoordinates, offset, end, stride, m, false);
+    }
+    offset = end;
+  }
+  return null;
+}
+
+//# sourceMappingURL=interpolate.js.map
+// CONCATENATED MODULE: ./node_modules/ol/geom/LineString.js
+/**
+ * @module ol/geom/LineString
+ */
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+/**
+ * @classdesc
+ * Linestring geometry.
+ *
+ * @api
+ */
+var LineString_LineString = /*@__PURE__*/(function (SimpleGeometry) {
+  function LineString(coordinates, opt_layout) {
+
+    SimpleGeometry.call(this);
+
+    /**
+     * @private
+     * @type {import("../coordinate.js").Coordinate}
+     */
+    this.flatMidpoint_ = null;
+
+    /**
+     * @private
+     * @type {number}
+     */
+    this.flatMidpointRevision_ = -1;
+
+    /**
+     * @private
+     * @type {number}
+     */
+    this.maxDelta_ = -1;
+
+    /**
+     * @private
+     * @type {number}
+     */
+    this.maxDeltaRevision_ = -1;
+
+    if (opt_layout !== undefined && !Array.isArray(coordinates[0])) {
+      this.setFlatCoordinates(opt_layout, /** @type {Array<number>} */ (coordinates));
+    } else {
+      this.setCoordinates(/** @type {Array<import("../coordinate.js").Coordinate>} */ (coordinates), opt_layout);
+    }
+
+  }
+
+  if ( SimpleGeometry ) LineString.__proto__ = SimpleGeometry;
+  LineString.prototype = Object.create( SimpleGeometry && SimpleGeometry.prototype );
+  LineString.prototype.constructor = LineString;
+
+  /**
+   * Append the passed coordinate to the coordinates of the linestring.
+   * @param {import("../coordinate.js").Coordinate} coordinate Coordinate.
+   * @api
+   */
+  LineString.prototype.appendCoordinate = function appendCoordinate (coordinate) {
+    if (!this.flatCoordinates) {
+      this.flatCoordinates = coordinate.slice();
+    } else {
+      extend(this.flatCoordinates, coordinate);
+    }
+    this.changed();
+  };
+
+  /**
+   * Make a complete copy of the geometry.
+   * @return {!LineString} Clone.
+   * @override
+   * @api
+   */
+  LineString.prototype.clone = function clone () {
+    return new LineString(this.flatCoordinates.slice(), this.layout);
+  };
+
+  /**
+   * @inheritDoc
+   */
+  LineString.prototype.closestPointXY = function closestPointXY (x, y, closestPoint, minSquaredDistance) {
+    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {
+      return minSquaredDistance;
+    }
+    if (this.maxDeltaRevision_ != this.getRevision()) {
+      this.maxDelta_ = Math.sqrt(maxSquaredDelta(
+        this.flatCoordinates, 0, this.flatCoordinates.length, this.stride, 0));
+      this.maxDeltaRevision_ = this.getRevision();
+    }
+    return assignClosestPoint(
+      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,
+      this.maxDelta_, false, x, y, closestPoint, minSquaredDistance);
+  };
+
+  /**
+   * Iterate over each segment, calling the provided callback.
+   * If the callback returns a truthy value the function returns that
+   * value immediately. Otherwise the function returns `false`.
+   *
+   * @param {function(this: S, import("../coordinate.js").Coordinate, import("../coordinate.js").Coordinate): T} callback Function
+   *     called for each segment.
+   * @return {T|boolean} Value.
+   * @template T,S
+   * @api
+   */
+  LineString.prototype.forEachSegment = function forEachSegment$1 (callback) {
+    return forEach(this.flatCoordinates, 0, this.flatCoordinates.length, this.stride, callback);
+  };
+
+  /**
+   * Returns the coordinate at `m` using linear interpolation, or `null` if no
+   * such coordinate exists.
+   *
+   * `opt_extrapolate` controls extrapolation beyond the range of Ms in the
+   * MultiLineString. If `opt_extrapolate` is `true` then Ms less than the first
+   * M will return the first coordinate and Ms greater than the last M will
+   * return the last coordinate.
+   *
+   * @param {number} m M.
+   * @param {boolean=} opt_extrapolate Extrapolate. Default is `false`.
+   * @return {import("../coordinate.js").Coordinate} Coordinate.
+   * @api
+   */
+  LineString.prototype.getCoordinateAtM = function getCoordinateAtM (m, opt_extrapolate) {
+    if (this.layout != GeometryLayout.XYM &&
+        this.layout != GeometryLayout.XYZM) {
+      return null;
+    }
+    var extrapolate = opt_extrapolate !== undefined ? opt_extrapolate : false;
+    return lineStringCoordinateAtM(this.flatCoordinates, 0,
+      this.flatCoordinates.length, this.stride, m, extrapolate);
+  };
+
+  /**
+   * Return the coordinates of the linestring.
+   * @return {Array<import("../coordinate.js").Coordinate>} Coordinates.
+   * @override
+   * @api
+   */
+  LineString.prototype.getCoordinates = function getCoordinates () {
+    return inflateCoordinates(
+      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);
+  };
+
+  /**
+   * Return the coordinate at the provided fraction along the linestring.
+   * The `fraction` is a number between 0 and 1, where 0 is the start of the
+   * linestring and 1 is the end.
+   * @param {number} fraction Fraction.
+   * @param {import("../coordinate.js").Coordinate=} opt_dest Optional coordinate whose values will
+   *     be modified. If not provided, a new coordinate will be returned.
+   * @return {import("../coordinate.js").Coordinate} Coordinate of the interpolated point.
+   * @api
+   */
+  LineString.prototype.getCoordinateAt = function getCoordinateAt (fraction, opt_dest) {
+    return interpolatePoint(
+      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,
+      fraction, opt_dest);
+  };
+
+  /**
+   * Return the length of the linestring on projected plane.
+   * @return {number} Length (on projected plane).
+   * @api
+   */
+  LineString.prototype.getLength = function getLength () {
+    return lineStringLength(
+      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);
+  };
+
+  /**
+   * @return {Array<number>} Flat midpoint.
+   */
+  LineString.prototype.getFlatMidpoint = function getFlatMidpoint () {
+    if (this.flatMidpointRevision_ != this.getRevision()) {
+      this.flatMidpoint_ = this.getCoordinateAt(0.5, this.flatMidpoint_);
+      this.flatMidpointRevision_ = this.getRevision();
+    }
+    return this.flatMidpoint_;
+  };
+
+  /**
+   * @inheritDoc
+   */
+  LineString.prototype.getSimplifiedGeometryInternal = function getSimplifiedGeometryInternal (squaredTolerance) {
+    var simplifiedFlatCoordinates = [];
+    simplifiedFlatCoordinates.length = douglasPeucker(
+      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,
+      squaredTolerance, simplifiedFlatCoordinates, 0);
+    return new LineString(simplifiedFlatCoordinates, GeometryLayout.XY);
+  };
+
+  /**
+   * @inheritDoc
+   * @api
+   */
+  LineString.prototype.getType = function getType () {
+    return GeometryType.LINE_STRING;
+  };
+
+  /**
+   * @inheritDoc
+   * @api
+   */
+  LineString.prototype.intersectsExtent = function intersectsExtent (extent) {
+    return intersectsLineString(
+      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,
+      extent);
+  };
+
+  /**
+   * Set the coordinates of the linestring.
+   * @param {!Array<import("../coordinate.js").Coordinate>} coordinates Coordinates.
+   * @param {GeometryLayout=} opt_layout Layout.
+   * @override
+   * @api
+   */
+  LineString.prototype.setCoordinates = function setCoordinates (coordinates, opt_layout) {
+    this.setLayout(opt_layout, coordinates, 1);
+    if (!this.flatCoordinates) {
+      this.flatCoordinates = [];
+    }
+    this.flatCoordinates.length = deflateCoordinates(
+      this.flatCoordinates, 0, coordinates, this.stride);
+    this.changed();
+  };
+
+  return LineString;
+}(geom_SimpleGeometry));
+
+
+/* harmony default export */ var geom_LineString = (LineString_LineString);
+
+//# sourceMappingURL=LineString.js.map
+// CONCATENATED MODULE: ./node_modules/ol/Feature.js
+/**
+ * @module ol/Feature
+ */
+
+
+
+
+
+/**
+ * @typedef {typeof Feature|typeof import("./render/Feature.js").default} FeatureClass
+ */
+
+/**
+ * @typedef {Feature|import("./render/Feature.js").default} FeatureLike
+ */
+
+/**
+ * @classdesc
+ * A vector object for geographic features with a geometry and other
+ * attribute properties, similar to the features in vector file formats like
+ * GeoJSON.
+ *
+ * Features can be styled individually with `setStyle`; otherwise they use the
+ * style of their vector layer.
+ *
+ * Note that attribute properties are set as {@link module:ol/Object} properties on
+ * the feature object, so they are observable, and have get/set accessors.
+ *
+ * Typically, a feature has a single geometry property. You can set the
+ * geometry using the `setGeometry` method and get it with `getGeometry`.
+ * It is possible to store more than one geometry on a feature using attribute
+ * properties. By default, the geometry used for rendering is identified by
+ * the property name `geometry`. If you want to use another geometry property
+ * for rendering, use the `setGeometryName` method to change the attribute
+ * property associated with the geometry for the feature.  For example:
+ *
+ * ```js
+ *
+ * import Feature from 'ol/Feature';
+ * import Polygon from 'ol/geom/Polygon';
+ * import Point from 'ol/geom/Point';
+ *
+ * var feature = new Feature({
+ *   geometry: new Polygon(polyCoords),
+ *   labelPoint: new Point(labelCoords),
+ *   name: 'My Polygon'
+ * });
+ *
+ * // get the polygon geometry
+ * var poly = feature.getGeometry();
+ *
+ * // Render the feature as a point using the coordinates from labelPoint
+ * feature.setGeometryName('labelPoint');
+ *
+ * // get the point geometry
+ * var point = feature.getGeometry();
+ * ```
+ *
+ * @api
+ */
+var Feature_Feature = /*@__PURE__*/(function (BaseObject) {
+  function Feature(opt_geometryOrProperties) {
+
+    BaseObject.call(this);
+
+    /**
+     * @private
+     * @type {number|string|undefined}
+     */
+    this.id_ = undefined;
+
+    /**
+     * @type {string}
+     * @private
+     */
+    this.geometryName_ = 'geometry';
+
+    /**
+     * User provided style.
+     * @private
+     * @type {import("./style/Style.js").StyleLike}
+     */
+    this.style_ = null;
+
+    /**
+     * @private
+     * @type {import("./style/Style.js").StyleFunction|undefined}
+     */
+    this.styleFunction_ = undefined;
+
+    /**
+     * @private
+     * @type {?import("./events.js").EventsKey}
+     */
+    this.geometryChangeKey_ = null;
+
+    Object(ol_events["a" /* listen */])(
+      this, Object(ol_Object["b" /* getChangeEventType */])(this.geometryName_),
+      this.handleGeometryChanged_, this);
+
+    if (opt_geometryOrProperties) {
+      if (typeof /** @type {?} */ (opt_geometryOrProperties).getSimplifiedGeometry === 'function') {
+        var geometry = /** @type {import("./geom/Geometry.js").default} */ (opt_geometryOrProperties);
+        this.setGeometry(geometry);
+      } else {
+        /** @type {Object<string, *>} */
+        var properties = opt_geometryOrProperties;
+        this.setProperties(properties);
+      }
+    }
+  }
+
+  if ( BaseObject ) Feature.__proto__ = BaseObject;
+  Feature.prototype = Object.create( BaseObject && BaseObject.prototype );
+  Feature.prototype.constructor = Feature;
+
+  /**
+   * Clone this feature. If the original feature has a geometry it
+   * is also cloned. The feature id is not set in the clone.
+   * @return {Feature} The clone.
+   * @api
+   */
+  Feature.prototype.clone = function clone () {
+    var clone = new Feature(this.getProperties());
+    clone.setGeometryName(this.getGeometryName());
+    var geometry = this.getGeometry();
+    if (geometry) {
+      clone.setGeometry(geometry.clone());
+    }
+    var style = this.getStyle();
+    if (style) {
+      clone.setStyle(style);
+    }
+    return clone;
+  };
+
+  /**
+   * Get the feature's default geometry.  A feature may have any number of named
+   * geometries.  The "default" geometry (the one that is rendered by default) is
+   * set when calling {@link module:ol/Feature~Feature#setGeometry}.
+   * @return {import("./geom/Geometry.js").default|undefined} The default geometry for the feature.
+   * @api
+   * @observable
+   */
+  Feature.prototype.getGeometry = function getGeometry () {
+    return (
+      /** @type {import("./geom/Geometry.js").default|undefined} */ (this.get(this.geometryName_))
+    );
+  };
+
+  /**
+   * Get the feature identifier.  This is a stable identifier for the feature and
+   * is either set when reading data from a remote source or set explicitly by
+   * calling {@link module:ol/Feature~Feature#setId}.
+   * @return {number|string|undefined} Id.
+   * @api
+   */
+  Feature.prototype.getId = function getId () {
+    return this.id_;
+  };
+
+  /**
+   * Get the name of the feature's default geometry.  By default, the default
+   * geometry is named `geometry`.
+   * @return {string} Get the property name associated with the default geometry
+   *     for this feature.
+   * @api
+   */
+  Feature.prototype.getGeometryName = function getGeometryName () {
+    return this.geometryName_;
+  };
+
+  /**
+   * Get the feature's style. Will return what was provided to the
+   * {@link module:ol/Feature~Feature#setStyle} method.
+   * @return {import("./style/Style.js").StyleLike} The feature style.
+   * @api
+   */
+  Feature.prototype.getStyle = function getStyle () {
+    return this.style_;
+  };
+
+  /**
+   * Get the feature's style function.
+   * @return {import("./style/Style.js").StyleFunction|undefined} Return a function
+   * representing the current style of this feature.
+   * @api
+   */
+  Feature.prototype.getStyleFunction = function getStyleFunction () {
+    return this.styleFunction_;
+  };
+
+  /**
+   * @private
+   */
+  Feature.prototype.handleGeometryChange_ = function handleGeometryChange_ () {
+    this.changed();
+  };
+
+  /**
+   * @private
+   */
+  Feature.prototype.handleGeometryChanged_ = function handleGeometryChanged_ () {
+    if (this.geometryChangeKey_) {
+      Object(ol_events["e" /* unlistenByKey */])(this.geometryChangeKey_);
+      this.geometryChangeKey_ = null;
+    }
+    var geometry = this.getGeometry();
+    if (geometry) {
+      this.geometryChangeKey_ = Object(ol_events["a" /* listen */])(geometry,
+        EventType["a" /* default */].CHANGE, this.handleGeometryChange_, this);
+    }
+    this.changed();
+  };
+
+  /**
+   * Set the default geometry for the feature.  This will update the property
+   * with the name returned by {@link module:ol/Feature~Feature#getGeometryName}.
+   * @param {import("./geom/Geometry.js").default|undefined} geometry The new geometry.
+   * @api
+   * @observable
+   */
+  Feature.prototype.setGeometry = function setGeometry (geometry) {
+    this.set(this.geometryName_, geometry);
+  };
+
+  /**
+   * Set the style for the feature.  This can be a single style object, an array
+   * of styles, or a function that takes a resolution and returns an array of
+   * styles. If it is `null` the feature has no style (a `null` style).
+   * @param {import("./style/Style.js").StyleLike} style Style for this feature.
+   * @api
+   * @fires module:ol/events/Event~Event#event:change
+   */
+  Feature.prototype.setStyle = function setStyle (style) {
+    this.style_ = style;
+    this.styleFunction_ = !style ? undefined : createStyleFunction(style);
+    this.changed();
+  };
+
+  /**
+   * Set the feature id.  The feature id is considered stable and may be used when
+   * requesting features or comparing identifiers returned from a remote source.
+   * The feature id can be used with the
+   * {@link module:ol/source/Vector~VectorSource#getFeatureById} method.
+   * @param {number|string|undefined} id The feature id.
+   * @api
+   * @fires module:ol/events/Event~Event#event:change
+   */
+  Feature.prototype.setId = function setId (id) {
+    this.id_ = id;
+    this.changed();
+  };
+
+  /**
+   * Set the property name to be used when getting the feature's default geometry.
+   * When calling {@link module:ol/Feature~Feature#getGeometry}, the value of the property with
+   * this name will be returned.
+   * @param {string} name The property name of the default geometry.
+   * @api
+   */
+  Feature.prototype.setGeometryName = function setGeometryName (name) {
+    Object(ol_events["c" /* unlisten */])(
+      this, Object(ol_Object["b" /* getChangeEventType */])(this.geometryName_),
+      this.handleGeometryChanged_, this);
+    this.geometryName_ = name;
+    Object(ol_events["a" /* listen */])(
+      this, Object(ol_Object["b" /* getChangeEventType */])(this.geometryName_),
+      this.handleGeometryChanged_, this);
+    this.handleGeometryChanged_();
+  };
+
+  return Feature;
+}(ol_Object["a" /* default */]));
+
+
+/**
+ * Convert the provided object into a feature style function.  Functions passed
+ * through unchanged.  Arrays of Style or single style objects wrapped
+ * in a new feature style function.
+ * @param {!import("./style/Style.js").StyleFunction|!Array<import("./style/Style.js").default>|!import("./style/Style.js").default} obj
+ *     A feature style function, a single style, or an array of styles.
+ * @return {import("./style/Style.js").StyleFunction} A style function.
+ */
+function createStyleFunction(obj) {
+  if (typeof obj === 'function') {
+    return obj;
+  } else {
+    /**
+     * @type {Array<import("./style/Style.js").default>}
+     */
+    var styles;
+    if (Array.isArray(obj)) {
+      styles = obj;
+    } else {
+      assert(typeof /** @type {?} */ (obj).getZIndex === 'function',
+        41); // Expected an `import("./style/Style.js").Style` or an array of `import("./style/Style.js").Style`
+      var style = /** @type {import("./style/Style.js").default} */ (obj);
+      styles = [style];
+    }
+    return function() {
+      return styles;
+    };
+  }
+}
+/* harmony default export */ var ol_Feature = (Feature_Feature);
+
+//# sourceMappingURL=Feature.js.map
+// CONCATENATED MODULE: ./node_modules/ol/geom/Circle.js
+/**
+ * @module ol/geom/Circle
+ */
+
+
+
+
+
+/**
+ * @classdesc
+ * Circle geometry.
+ *
+ * @api
+ */
+var Circle_Circle = /*@__PURE__*/(function (SimpleGeometry) {
+  function Circle(center, opt_radius, opt_layout) {
+    SimpleGeometry.call(this);
+    if (opt_layout !== undefined && opt_radius === undefined) {
+      this.setFlatCoordinates(opt_layout, center);
+    } else {
+      var radius = opt_radius ? opt_radius : 0;
+      this.setCenterAndRadius(center, radius, opt_layout);
+    }
+  }
+
+  if ( SimpleGeometry ) Circle.__proto__ = SimpleGeometry;
+  Circle.prototype = Object.create( SimpleGeometry && SimpleGeometry.prototype );
+  Circle.prototype.constructor = Circle;
+
+  /**
+   * Make a complete copy of the geometry.
+   * @return {!Circle} Clone.
+   * @override
+   * @api
+   */
+  Circle.prototype.clone = function clone () {
+    return new Circle(this.flatCoordinates.slice(), undefined, this.layout);
+  };
+
+  /**
+   * @inheritDoc
+   */
+  Circle.prototype.closestPointXY = function closestPointXY (x, y, closestPoint, minSquaredDistance) {
+    var flatCoordinates = this.flatCoordinates;
+    var dx = x - flatCoordinates[0];
+    var dy = y - flatCoordinates[1];
+    var squaredDistance = dx * dx + dy * dy;
+    if (squaredDistance < minSquaredDistance) {
+      if (squaredDistance === 0) {
+        for (var i = 0; i < this.stride; ++i) {
+          closestPoint[i] = flatCoordinates[i];
+        }
+      } else {
+        var delta = this.getRadius() / Math.sqrt(squaredDistance);
+        closestPoint[0] = flatCoordinates[0] + delta * dx;
+        closestPoint[1] = flatCoordinates[1] + delta * dy;
+        for (var i$1 = 2; i$1 < this.stride; ++i$1) {
+          closestPoint[i$1] = flatCoordinates[i$1];
+        }
+      }
+      closestPoint.length = this.stride;
+      return squaredDistance;
+    } else {
+      return minSquaredDistance;
+    }
+  };
+
+  /**
+   * @inheritDoc
+   */
+  Circle.prototype.containsXY = function containsXY (x, y) {
+    var flatCoordinates = this.flatCoordinates;
+    var dx = x - flatCoordinates[0];
+    var dy = y - flatCoordinates[1];
+    return dx * dx + dy * dy <= this.getRadiusSquared_();
+  };
+
+  /**
+   * Return the center of the circle as {@link module:ol/coordinate~Coordinate coordinate}.
+   * @return {import("../coordinate.js").Coordinate} Center.
+   * @api
+   */
+  Circle.prototype.getCenter = function getCenter () {
+    return this.flatCoordinates.slice(0, this.stride);
+  };
+
+  /**
+   * @inheritDoc
+   */
+  Circle.prototype.computeExtent = function computeExtent (extent) {
+    var flatCoordinates = this.flatCoordinates;
+    var radius = flatCoordinates[this.stride] - flatCoordinates[0];
+    return createOrUpdate(
+      flatCoordinates[0] - radius, flatCoordinates[1] - radius,
+      flatCoordinates[0] + radius, flatCoordinates[1] + radius,
+      extent);
+  };
+
+  /**
+   * Return the radius of the circle.
+   * @return {number} Radius.
+   * @api
+   */
+  Circle.prototype.getRadius = function getRadius () {
+    return Math.sqrt(this.getRadiusSquared_());
+  };
+
+  /**
+   * @private
+   * @return {number} Radius squared.
+   */
+  Circle.prototype.getRadiusSquared_ = function getRadiusSquared_ () {
+    var dx = this.flatCoordinates[this.stride] - this.flatCoordinates[0];
+    var dy = this.flatCoordinates[this.stride + 1] - this.flatCoordinates[1];
+    return dx * dx + dy * dy;
+  };
+
+  /**
+   * @inheritDoc
+   * @api
+   */
+  Circle.prototype.getType = function getType () {
+    return GeometryType.CIRCLE;
+  };
+
+  /**
+   * @inheritDoc
+   * @api
+   */
+  Circle.prototype.intersectsExtent = function intersectsExtent (extent) {
+    var circleExtent = this.getExtent();
+    if (extent_intersects(extent, circleExtent)) {
+      var center = this.getCenter();
+
+      if (extent[0] <= center[0] && extent[2] >= center[0]) {
+        return true;
+      }
+      if (extent[1] <= center[1] && extent[3] >= center[1]) {
+        return true;
+      }
+
+      return forEachCorner(extent, this.intersectsCoordinate, this);
+    }
+    return false;
+
+  };
+
+  /**
+   * Set the center of the circle as {@link module:ol/coordinate~Coordinate coordinate}.
+   * @param {import("../coordinate.js").Coordinate} center Center.
+   * @api
+   */
+  Circle.prototype.setCenter = function setCenter (center) {
+    var stride = this.stride;
+    var radius = this.flatCoordinates[stride] - this.flatCoordinates[0];
+    var flatCoordinates = center.slice();
+    flatCoordinates[stride] = flatCoordinates[0] + radius;
+    for (var i = 1; i < stride; ++i) {
+      flatCoordinates[stride + i] = center[i];
+    }
+    this.setFlatCoordinates(this.layout, flatCoordinates);
+    this.changed();
+  };
+
+  /**
+   * Set the center (as {@link module:ol/coordinate~Coordinate coordinate}) and the radius (as
+   * number) of the circle.
+   * @param {!import("../coordinate.js").Coordinate} center Center.
+   * @param {number} radius Radius.
+   * @param {import("./GeometryLayout.js").default=} opt_layout Layout.
+   * @api
+   */
+  Circle.prototype.setCenterAndRadius = function setCenterAndRadius (center, radius, opt_layout) {
+    this.setLayout(opt_layout, center, 0);
+    if (!this.flatCoordinates) {
+      this.flatCoordinates = [];
+    }
+    /** @type {Array<number>} */
+    var flatCoordinates = this.flatCoordinates;
+    var offset = deflateCoordinate(
+      flatCoordinates, 0, center, this.stride);
+    flatCoordinates[offset++] = flatCoordinates[0] + radius;
+    for (var i = 1, ii = this.stride; i < ii; ++i) {
+      flatCoordinates[offset++] = flatCoordinates[i];
+    }
+    flatCoordinates.length = offset;
+    this.changed();
+  };
+
+  /**
+   * @inheritDoc
+   */
+  Circle.prototype.getCoordinates = function getCoordinates () {
+    return null;
+  };
+
+  /**
+   * @inheritDoc
+   */
+  Circle.prototype.setCoordinates = function setCoordinates (coordinates, opt_layout) {};
+
+  /**
+   * Set the radius of the circle. The radius is in the units of the projection.
+   * @param {number} radius Radius.
+   * @api
+   */
+  Circle.prototype.setRadius = function setRadius (radius) {
+    this.flatCoordinates[this.stride] = this.flatCoordinates[0] + radius;
+    this.changed();
+  };
+
+  return Circle;
+}(geom_SimpleGeometry));
+
+
+/**
+ * Transform each coordinate of the circle from one coordinate reference system
+ * to another. The geometry is modified in place.
+ * If you do not want the geometry modified in place, first clone() it and
+ * then use this function on the clone.
+ *
+ * Internally a circle is currently represented by two points: the center of
+ * the circle `[cx, cy]`, and the point to the right of the circle
+ * `[cx + r, cy]`. This `transform` function just transforms these two points.
+ * So the resulting geometry is also a circle, and that circle does not
+ * correspond to the shape that would be obtained by transforming every point
+ * of the original circle.
+ *
+ * @param {import("../proj.js").ProjectionLike} source The current projection.  Can be a
+ *     string identifier or a {@link module:ol/proj/Projection~Projection} object.
+ * @param {import("../proj.js").ProjectionLike} destination The desired projection.  Can be a
+ *     string identifier or a {@link module:ol/proj/Projection~Projection} object.
+ * @return {Circle} This geometry.  Note that original geometry is
+ *     modified in place.
+ * @function
+ * @api
+ */
+Circle_Circle.prototype.transform;
+/* harmony default export */ var geom_Circle = (Circle_Circle);
+
+//# sourceMappingURL=Circle.js.map
+// CONCATENATED MODULE: ./node_modules/ol/geom/MultiLineString.js
+/**
+ * @module ol/geom/MultiLineString
+ */
+
+
+
+
+
+
+
+
+
+
+
+
+
+/**
+ * @classdesc
+ * Multi-linestring geometry.
+ *
+ * @api
+ */
+var MultiLineString_MultiLineString = /*@__PURE__*/(function (SimpleGeometry) {
+  function MultiLineString(coordinates, opt_layout, opt_ends) {
+
+    SimpleGeometry.call(this);
+
+    /**
+     * @type {Array<number>}
+     * @private
+     */
+    this.ends_ = [];
+
+    /**
+     * @private
+     * @type {number}
+     */
+    this.maxDelta_ = -1;
+
+    /**
+     * @private
+     * @type {number}
+     */
+    this.maxDeltaRevision_ = -1;
+
+    if (Array.isArray(coordinates[0])) {
+      this.setCoordinates(/** @type {Array<Array<import("../coordinate.js").Coordinate>>} */ (coordinates), opt_layout);
+    } else if (opt_layout !== undefined && opt_ends) {
+      this.setFlatCoordinates(opt_layout, /** @type {Array<number>} */ (coordinates));
+      this.ends_ = opt_ends;
+    } else {
+      var layout = this.getLayout();
+      var lineStrings = /** @type {Array<LineString>} */ (coordinates);
+      var flatCoordinates = [];
+      var ends = [];
+      for (var i = 0, ii = lineStrings.length; i < ii; ++i) {
+        var lineString = lineStrings[i];
+        if (i === 0) {
+          layout = lineString.getLayout();
+        }
+        extend(flatCoordinates, lineString.getFlatCoordinates());
+        ends.push(flatCoordinates.length);
+      }
+      this.setFlatCoordinates(layout, flatCoordinates);
+      this.ends_ = ends;
+    }
+
+  }
+
+  if ( SimpleGeometry ) MultiLineString.__proto__ = SimpleGeometry;
+  MultiLineString.prototype = Object.create( SimpleGeometry && SimpleGeometry.prototype );
+  MultiLineString.prototype.constructor = MultiLineString;
+
+  /**
+   * Append the passed linestring to the multilinestring.
+   * @param {LineString} lineString LineString.
+   * @api
+   */
+  MultiLineString.prototype.appendLineString = function appendLineString (lineString) {
+    if (!this.flatCoordinates) {
+      this.flatCoordinates = lineString.getFlatCoordinates().slice();
+    } else {
+      extend(this.flatCoordinates, lineString.getFlatCoordinates().slice());
+    }
+    this.ends_.push(this.flatCoordinates.length);
+    this.changed();
+  };
+
+  /**
+   * Make a complete copy of the geometry.
+   * @return {!MultiLineString} Clone.
+   * @override
+   * @api
+   */
+  MultiLineString.prototype.clone = function clone () {
+    return new MultiLineString(this.flatCoordinates.slice(), this.layout, this.ends_.slice());
+  };
+
+  /**
+   * @inheritDoc
+   */
+  MultiLineString.prototype.closestPointXY = function closestPointXY (x, y, closestPoint, minSquaredDistance) {
+    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {
+      return minSquaredDistance;
+    }
+    if (this.maxDeltaRevision_ != this.getRevision()) {
+      this.maxDelta_ = Math.sqrt(arrayMaxSquaredDelta(
+        this.flatCoordinates, 0, this.ends_, this.stride, 0));
+      this.maxDeltaRevision_ = this.getRevision();
+    }
+    return assignClosestArrayPoint(
+      this.flatCoordinates, 0, this.ends_, this.stride,
+      this.maxDelta_, false, x, y, closestPoint, minSquaredDistance);
+  };
+
+  /**
+   * Returns the coordinate at `m` using linear interpolation, or `null` if no
+   * such coordinate exists.
+   *
+   * `opt_extrapolate` controls extrapolation beyond the range of Ms in the
+   * MultiLineString. If `opt_extrapolate` is `true` then Ms less than the first
+   * M will return the first coordinate and Ms greater than the last M will
+   * return the last coordinate.
+   *
+   * `opt_interpolate` controls interpolation between consecutive LineStrings
+   * within the MultiLineString. If `opt_interpolate` is `true` the coordinates
+   * will be linearly interpolated between the last coordinate of one LineString
+   * and the first coordinate of the next LineString.  If `opt_interpolate` is
+   * `false` then the function will return `null` for Ms falling between
+   * LineStrings.
+   *
+   * @param {number} m M.
+   * @param {boolean=} opt_extrapolate Extrapolate. Default is `false`.
+   * @param {boolean=} opt_interpolate Interpolate. Default is `false`.
+   * @return {import("../coordinate.js").Coordinate} Coordinate.
+   * @api
+   */
+  MultiLineString.prototype.getCoordinateAtM = function getCoordinateAtM (m, opt_extrapolate, opt_interpolate) {
+    if ((this.layout != GeometryLayout.XYM &&
+         this.layout != GeometryLayout.XYZM) ||
+        this.flatCoordinates.length === 0) {
+      return null;
+    }
+    var extrapolate = opt_extrapolate !== undefined ? opt_extrapolate : false;
+    var interpolate = opt_interpolate !== undefined ? opt_interpolate : false;
+    return lineStringsCoordinateAtM(this.flatCoordinates, 0,
+      this.ends_, this.stride, m, extrapolate, interpolate);
+  };
+
+  /**
+   * Return the coordinates of the multilinestring.
+   * @return {Array<Array<import("../coordinate.js").Coordinate>>} Coordinates.
+   * @override
+   * @api
+   */
+  MultiLineString.prototype.getCoordinates = function getCoordinates () {
+    return inflateCoordinatesArray(
+      this.flatCoordinates, 0, this.ends_, this.stride);
+  };
+
+  /**
+   * @return {Array<number>} Ends.
+   */
+  MultiLineString.prototype.getEnds = function getEnds () {
+    return this.ends_;
+  };
+
+  /**
+   * Return the linestring at the specified index.
+   * @param {number} index Index.
+   * @return {LineString} LineString.
+   * @api
+   */
+  MultiLineString.prototype.getLineString = function getLineString (index) {
+    if (index < 0 || this.ends_.length <= index) {
+      return null;
+    }
+    return new geom_LineString(this.flatCoordinates.slice(
+      index === 0 ? 0 : this.ends_[index - 1], this.ends_[index]), this.layout);
+  };
+
+  /**
+   * Return the linestrings of this multilinestring.
+   * @return {Array<LineString>} LineStrings.
+   * @api
+   */
+  MultiLineString.prototype.getLineStrings = function getLineStrings () {
+    var flatCoordinates = this.flatCoordinates;
+    var ends = this.ends_;
+    var layout = this.layout;
+    /** @type {Array<LineString>} */
+    var lineStrings = [];
+    var offset = 0;
+    for (var i = 0, ii = ends.length; i < ii; ++i) {
+      var end = ends[i];
+      var lineString = new geom_LineString(flatCoordinates.slice(offset, end), layout);
+      lineStrings.push(lineString);
+      offset = end;
+    }
+    return lineStrings;
+  };
+
+  /**
+   * @return {Array<number>} Flat midpoints.
+   */
+  MultiLineString.prototype.getFlatMidpoints = function getFlatMidpoints () {
+    var midpoints = [];
+    var flatCoordinates = this.flatCoordinates;
+    var offset = 0;
+    var ends = this.ends_;
+    var stride = this.stride;
+    for (var i = 0, ii = ends.length; i < ii; ++i) {
+      var end = ends[i];
+      var midpoint = interpolatePoint(
+        flatCoordinates, offset, end, stride, 0.5);
+      extend(midpoints, midpoint);
+      offset = end;
+    }
+    return midpoints;
+  };
+
+  /**
+   * @inheritDoc
+   */
+  MultiLineString.prototype.getSimplifiedGeometryInternal = function getSimplifiedGeometryInternal (squaredTolerance) {
+    var simplifiedFlatCoordinates = [];
+    var simplifiedEnds = [];
+    simplifiedFlatCoordinates.length = douglasPeuckerArray(
+      this.flatCoordinates, 0, this.ends_, this.stride, squaredTolerance,
+      simplifiedFlatCoordinates, 0, simplifiedEnds);
+    return new MultiLineString(simplifiedFlatCoordinates, GeometryLayout.XY, simplifiedEnds);
+  };
+
+  /**
+   * @inheritDoc
+   * @api
+   */
+  MultiLineString.prototype.getType = function getType () {
+    return GeometryType.MULTI_LINE_STRING;
+  };
+
+  /**
+   * @inheritDoc
+   * @api
+   */
+  MultiLineString.prototype.intersectsExtent = function intersectsExtent (extent) {
+    return intersectsLineStringArray(
+      this.flatCoordinates, 0, this.ends_, this.stride, extent);
+  };
+
+  /**
+   * Set the coordinates of the multilinestring.
+   * @param {!Array<Array<import("../coordinate.js").Coordinate>>} coordinates Coordinates.
+   * @param {GeometryLayout=} opt_layout Layout.
+   * @override
+   * @api
+   */
+  MultiLineString.prototype.setCoordinates = function setCoordinates (coordinates, opt_layout) {
+    this.setLayout(opt_layout, coordinates, 2);
+    if (!this.flatCoordinates) {
+      this.flatCoordinates = [];
+    }
+    var ends = deflateCoordinatesArray(
+      this.flatCoordinates, 0, coordinates, this.stride, this.ends_);
+    this.flatCoordinates.length = ends.length === 0 ? 0 : ends[ends.length - 1];
+    this.changed();
+  };
+
+  return MultiLineString;
+}(geom_SimpleGeometry));
+
+
+/* harmony default export */ var geom_MultiLineString = (MultiLineString_MultiLineString);
+
+//# sourceMappingURL=MultiLineString.js.map
+// CONCATENATED MODULE: ./node_modules/ol/geom/MultiPoint.js
+/**
+ * @module ol/geom/MultiPoint
+ */
+
+
+
+
+
+
+
+
+
+/**
+ * @classdesc
+ * Multi-point geometry.
+ *
+ * @api
+ */
+var MultiPoint_MultiPoint = /*@__PURE__*/(function (SimpleGeometry) {
+  function MultiPoint(coordinates, opt_layout) {
+    SimpleGeometry.call(this);
+    if (opt_layout && !Array.isArray(coordinates[0])) {
+      this.setFlatCoordinates(opt_layout, /** @type {Array<number>} */ (coordinates));
+    } else {
+      this.setCoordinates(/** @type {Array<import("../coordinate.js").Coordinate>} */ (coordinates), opt_layout);
+    }
+  }
+
+  if ( SimpleGeometry ) MultiPoint.__proto__ = SimpleGeometry;
+  MultiPoint.prototype = Object.create( SimpleGeometry && SimpleGeometry.prototype );
+  MultiPoint.prototype.constructor = MultiPoint;
+
+  /**
+   * Append the passed point to this multipoint.
+   * @param {Point} point Point.
+   * @api
+   */
+  MultiPoint.prototype.appendPoint = function appendPoint (point) {
+    if (!this.flatCoordinates) {
+      this.flatCoordinates = point.getFlatCoordinates().slice();
+    } else {
+      extend(this.flatCoordinates, point.getFlatCoordinates());
+    }
+    this.changed();
+  };
+
+  /**
+   * Make a complete copy of the geometry.
+   * @return {!MultiPoint} Clone.
+   * @override
+   * @api
+   */
+  MultiPoint.prototype.clone = function clone () {
+    var multiPoint = new MultiPoint(this.flatCoordinates.slice(), this.layout);
+    return multiPoint;
+  };
+
+  /**
+   * @inheritDoc
+   */
+  MultiPoint.prototype.closestPointXY = function closestPointXY (x, y, closestPoint, minSquaredDistance) {
+    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {
+      return minSquaredDistance;
+    }
+    var flatCoordinates = this.flatCoordinates;
+    var stride = this.stride;
+    for (var i = 0, ii = flatCoordinates.length; i < ii; i += stride) {
+      var squaredDistance = math_squaredDistance(
+        x, y, flatCoordinates[i], flatCoordinates[i + 1]);
+      if (squaredDistance < minSquaredDistance) {
+        minSquaredDistance = squaredDistance;
+        for (var j = 0; j < stride; ++j) {
+          closestPoint[j] = flatCoordinates[i + j];
+        }
+        closestPoint.length = stride;
+      }
+    }
+    return minSquaredDistance;
+  };
+
+  /**
+   * Return the coordinates of the multipoint.
+   * @return {Array<import("../coordinate.js").Coordinate>} Coordinates.
+   * @override
+   * @api
+   */
+  MultiPoint.prototype.getCoordinates = function getCoordinates () {
+    return inflateCoordinates(
+      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);
+  };
+
+  /**
+   * Return the point at the specified index.
+   * @param {number} index Index.
+   * @return {Point} Point.
+   * @api
+   */
+  MultiPoint.prototype.getPoint = function getPoint (index) {
+    var n = !this.flatCoordinates ? 0 : this.flatCoordinates.length / this.stride;
+    if (index < 0 || n <= index) {
+      return null;
+    }
+    return new geom_Point(this.flatCoordinates.slice(
+      index * this.stride, (index + 1) * this.stride), this.layout);
+  };
+
+  /**
+   * Return the points of this multipoint.
+   * @return {Array<Point>} Points.
+   * @api
+   */
+  MultiPoint.prototype.getPoints = function getPoints () {
+    var flatCoordinates = this.flatCoordinates;
+    var layout = this.layout;
+    var stride = this.stride;
+    /** @type {Array<Point>} */
+    var points = [];
+    for (var i = 0, ii = flatCoordinates.length; i < ii; i += stride) {
+      var point = new geom_Point(flatCoordinates.slice(i, i + stride), layout);
+      points.push(point);
+    }
+    return points;
+  };
+
+  /**
+   * @inheritDoc
+   * @api
+   */
+  MultiPoint.prototype.getType = function getType () {
+    return GeometryType.MULTI_POINT;
+  };
+
+  /**
+   * @inheritDoc
+   * @api
+   */
+  MultiPoint.prototype.intersectsExtent = function intersectsExtent (extent) {
+    var flatCoordinates = this.flatCoordinates;
+    var stride = this.stride;
+    for (var i = 0, ii = flatCoordinates.length; i < ii; i += stride) {
+      var x = flatCoordinates[i];
+      var y = flatCoordinates[i + 1];
+      if (extent_containsXY(extent, x, y)) {
+        return true;
+      }
+    }
+    return false;
+  };
+
+  /**
+   * Set the coordinates of the multipoint.
+   * @param {!Array<import("../coordinate.js").Coordinate>} coordinates Coordinates.
+   * @param {import("./GeometryLayout.js").default=} opt_layout Layout.
+   * @override
+   * @api
+   */
+  MultiPoint.prototype.setCoordinates = function setCoordinates (coordinates, opt_layout) {
+    this.setLayout(opt_layout, coordinates, 1);
+    if (!this.flatCoordinates) {
+      this.flatCoordinates = [];
+    }
+    this.flatCoordinates.length = deflateCoordinates(
+      this.flatCoordinates, 0, coordinates, this.stride);
+    this.changed();
+  };
+
+  return MultiPoint;
+}(geom_SimpleGeometry));
+
+
+/* harmony default export */ var geom_MultiPoint = (MultiPoint_MultiPoint);
+
+//# sourceMappingURL=MultiPoint.js.map
+// CONCATENATED MODULE: ./node_modules/ol/geom/flat/center.js
+/**
+ * @module ol/geom/flat/center
+ */
+
+
+
+/**
+ * @param {Array<number>} flatCoordinates Flat coordinates.
+ * @param {number} offset Offset.
+ * @param {Array<Array<number>>} endss Endss.
+ * @param {number} stride Stride.
+ * @return {Array<number>} Flat centers.
+ */
+function center_linearRingss(flatCoordinates, offset, endss, stride) {
+  var flatCenters = [];
+  var extent = createEmpty();
+  for (var i = 0, ii = endss.length; i < ii; ++i) {
+    var ends = endss[i];
+    extent = createOrUpdateFromFlatCoordinates(flatCoordinates, offset, ends[0], stride);
+    flatCenters.push((extent[0] + extent[2]) / 2, (extent[1] + extent[3]) / 2);
+    offset = ends[ends.length - 1];
+  }
+  return flatCenters;
+}
+
+//# sourceMappingURL=center.js.map
+// CONCATENATED MODULE: ./node_modules/ol/geom/MultiPolygon.js
+/**
+ * @module ol/geom/MultiPolygon
+ */
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+/**
+ * @classdesc
+ * Multi-polygon geometry.
+ *
+ * @api
+ */
+var MultiPolygon_MultiPolygon = /*@__PURE__*/(function (SimpleGeometry) {
+  function MultiPolygon(coordinates, opt_layout, opt_endss) {
+
+    SimpleGeometry.call(this);
+
+    /**
+     * @type {Array<Array<number>>}
+     * @private
+     */
+    this.endss_ = [];
+
+    /**
+     * @private
+     * @type {number}
+     */
+    this.flatInteriorPointsRevision_ = -1;
+
+    /**
+     * @private
+     * @type {Array<number>}
+     */
+    this.flatInteriorPoints_ = null;
+
+    /**
+     * @private
+     * @type {number}
+     */
+    this.maxDelta_ = -1;
+
+    /**
+     * @private
+     * @type {number}
+     */
+    this.maxDeltaRevision_ = -1;
+
+    /**
+     * @private
+     * @type {number}
+     */
+    this.orientedRevision_ = -1;
+
+    /**
+     * @private
+     * @type {Array<number>}
+     */
+    this.orientedFlatCoordinates_ = null;
+
+    if (!opt_endss && !Array.isArray(coordinates[0])) {
+      var layout = this.getLayout();
+      var polygons = /** @type {Array<Polygon>} */ (coordinates);
+      var flatCoordinates = [];
+      var endss = [];
+      for (var i = 0, ii = polygons.length; i < ii; ++i) {
+        var polygon = polygons[i];
+        if (i === 0) {
+          layout = polygon.getLayout();
+        }
+        var offset = flatCoordinates.length;
+        var ends = polygon.getEnds();
+        for (var j = 0, jj = ends.length; j < jj; ++j) {
+          ends[j] += offset;
+        }
+        extend(flatCoordinates, polygon.getFlatCoordinates());
+        endss.push(ends);
+      }
+      opt_layout = layout;
+      coordinates = flatCoordinates;
+      opt_endss = endss;
+    }
+    if (opt_layout !== undefined && opt_endss) {
+      this.setFlatCoordinates(opt_layout, /** @type {Array<number>} */ (coordinates));
+      this.endss_ = opt_endss;
+    } else {
+      this.setCoordinates(/** @type {Array<Array<Array<import("../coordinate.js").Coordinate>>>} */ (coordinates),
+        opt_layout);
+    }
+
+  }
+
+  if ( SimpleGeometry ) MultiPolygon.__proto__ = SimpleGeometry;
+  MultiPolygon.prototype = Object.create( SimpleGeometry && SimpleGeometry.prototype );
+  MultiPolygon.prototype.constructor = MultiPolygon;
+
+  /**
+   * Append the passed polygon to this multipolygon.
+   * @param {Polygon} polygon Polygon.
+   * @api
+   */
+  MultiPolygon.prototype.appendPolygon = function appendPolygon (polygon) {
+    /** @type {Array<number>} */
+    var ends;
+    if (!this.flatCoordinates) {
+      this.flatCoordinates = polygon.getFlatCoordinates().slice();
+      ends = polygon.getEnds().slice();
+      this.endss_.push();
+    } else {
+      var offset = this.flatCoordinates.length;
+      extend(this.flatCoordinates, polygon.getFlatCoordinates());
+      ends = polygon.getEnds().slice();
+      for (var i = 0, ii = ends.length; i < ii; ++i) {
+        ends[i] += offset;
+      }
+    }
+    this.endss_.push(ends);
+    this.changed();
+  };
+
+  /**
+   * Make a complete copy of the geometry.
+   * @return {!MultiPolygon} Clone.
+   * @override
+   * @api
+   */
+  MultiPolygon.prototype.clone = function clone () {
+    var len = this.endss_.length;
+    var newEndss = new Array(len);
+    for (var i = 0; i < len; ++i) {
+      newEndss[i] = this.endss_[i].slice();
+    }
+
+    return new MultiPolygon(
+      this.flatCoordinates.slice(), this.layout, newEndss);
+  };
+
+  /**
+   * @inheritDoc
+   */
+  MultiPolygon.prototype.closestPointXY = function closestPointXY (x, y, closestPoint, minSquaredDistance) {
+    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {
+      return minSquaredDistance;
+    }
+    if (this.maxDeltaRevision_ != this.getRevision()) {
+      this.maxDelta_ = Math.sqrt(multiArrayMaxSquaredDelta(
+        this.flatCoordinates, 0, this.endss_, this.stride, 0));
+      this.maxDeltaRevision_ = this.getRevision();
+    }
+    return assignClosestMultiArrayPoint(
+      this.getOrientedFlatCoordinates(), 0, this.endss_, this.stride,
+      this.maxDelta_, true, x, y, closestPoint, minSquaredDistance);
+  };
+
+  /**
+   * @inheritDoc
+   */
+  MultiPolygon.prototype.containsXY = function containsXY (x, y) {
+    return linearRingssContainsXY(this.getOrientedFlatCoordinates(), 0, this.endss_, this.stride, x, y);
+  };
+
+  /**
+   * Return the area of the multipolygon on projected plane.
+   * @return {number} Area (on projected plane).
+   * @api
+   */
+  MultiPolygon.prototype.getArea = function getArea () {
+    return linearRingss(this.getOrientedFlatCoordinates(), 0, this.endss_, this.stride);
+  };
+
+  /**
+   * Get the coordinate array for this geometry.  This array has the structure
+   * of a GeoJSON coordinate array for multi-polygons.
+   *
+   * @param {boolean=} opt_right Orient coordinates according to the right-hand
+   *     rule (counter-clockwise for exterior and clockwise for interior rings).
+   *     If `false`, coordinates will be oriented according to the left-hand rule
+   *     (clockwise for exterior and counter-clockwise for interior rings).
+   *     By default, coordinate orientation will depend on how the geometry was
+   *     constructed.
+   * @return {Array<Array<Array<import("../coordinate.js").Coordinate>>>} Coordinates.
+   * @override
+   * @api
+   */
+  MultiPolygon.prototype.getCoordinates = function getCoordinates (opt_right) {
+    var flatCoordinates;
+    if (opt_right !== undefined) {
+      flatCoordinates = this.getOrientedFlatCoordinates().slice();
+      orientLinearRingsArray(
+        flatCoordinates, 0, this.endss_, this.stride, opt_right);
+    } else {
+      flatCoordinates = this.flatCoordinates;
+    }
+
+    return inflateMultiCoordinatesArray(
+      flatCoordinates, 0, this.endss_, this.stride);
+  };
+
+  /**
+   * @return {Array<Array<number>>} Endss.
+   */
+  MultiPolygon.prototype.getEndss = function getEndss () {
+    return this.endss_;
+  };
+
+  /**
+   * @return {Array<number>} Flat interior points.
+   */
+  MultiPolygon.prototype.getFlatInteriorPoints = function getFlatInteriorPoints () {
+    if (this.flatInteriorPointsRevision_ != this.getRevision()) {
+      var flatCenters = center_linearRingss(
+        this.flatCoordinates, 0, this.endss_, this.stride);
+      this.flatInteriorPoints_ = getInteriorPointsOfMultiArray(
+        this.getOrientedFlatCoordinates(), 0, this.endss_, this.stride,
+        flatCenters);
+      this.flatInteriorPointsRevision_ = this.getRevision();
+    }
+    return this.flatInteriorPoints_;
+  };
+
+  /**
+   * Return the interior points as {@link module:ol/geom/MultiPoint multipoint}.
+   * @return {MultiPoint} Interior points as XYM coordinates, where M is
+   * the length of the horizontal intersection that the point belongs to.
+   * @api
+   */
+  MultiPolygon.prototype.getInteriorPoints = function getInteriorPoints () {
+    return new geom_MultiPoint(this.getFlatInteriorPoints().slice(), GeometryLayout.XYM);
+  };
+
+  /**
+   * @return {Array<number>} Oriented flat coordinates.
+   */
+  MultiPolygon.prototype.getOrientedFlatCoordinates = function getOrientedFlatCoordinates () {
+    if (this.orientedRevision_ != this.getRevision()) {
+      var flatCoordinates = this.flatCoordinates;
+      if (linearRingsAreOriented(
+        flatCoordinates, 0, this.endss_, this.stride)) {
+        this.orientedFlatCoordinates_ = flatCoordinates;
+      } else {
+        this.orientedFlatCoordinates_ = flatCoordinates.slice();
+        this.orientedFlatCoordinates_.length =
+            orientLinearRingsArray(
+              this.orientedFlatCoordinates_, 0, this.endss_, this.stride);
+      }
+      this.orientedRevision_ = this.getRevision();
+    }
+    return this.orientedFlatCoordinates_;
+  };
+
+  /**
+   * @inheritDoc
+   */
+  MultiPolygon.prototype.getSimplifiedGeometryInternal = function getSimplifiedGeometryInternal (squaredTolerance) {
+    var simplifiedFlatCoordinates = [];
+    var simplifiedEndss = [];
+    simplifiedFlatCoordinates.length = quantizeMultiArray(
+      this.flatCoordinates, 0, this.endss_, this.stride,
+      Math.sqrt(squaredTolerance),
+      simplifiedFlatCoordinates, 0, simplifiedEndss);
+    return new MultiPolygon(simplifiedFlatCoordinates, GeometryLayout.XY, simplifiedEndss);
+  };
+
+  /**
+   * Return the polygon at the specified index.
+   * @param {number} index Index.
+   * @return {Polygon} Polygon.
+   * @api
+   */
+  MultiPolygon.prototype.getPolygon = function getPolygon (index) {
+    if (index < 0 || this.endss_.length <= index) {
+      return null;
+    }
+    var offset;
+    if (index === 0) {
+      offset = 0;
+    } else {
+      var prevEnds = this.endss_[index - 1];
+      offset = prevEnds[prevEnds.length - 1];
+    }
+    var ends = this.endss_[index].slice();
+    var end = ends[ends.length - 1];
+    if (offset !== 0) {
+      for (var i = 0, ii = ends.length; i < ii; ++i) {
+        ends[i] -= offset;
+      }
+    }
+    return new geom_Polygon(this.flatCoordinates.slice(offset, end), this.layout, ends);
+  };
+
+  /**
+   * Return the polygons of this multipolygon.
+   * @return {Array<Polygon>} Polygons.
+   * @api
+   */
+  MultiPolygon.prototype.getPolygons = function getPolygons () {
+    var layout = this.layout;
+    var flatCoordinates = this.flatCoordinates;
+    var endss = this.endss_;
+    var polygons = [];
+    var offset = 0;
+    for (var i = 0, ii = endss.length; i < ii; ++i) {
+      var ends = endss[i].slice();
+      var end = ends[ends.length - 1];
+      if (offset !== 0) {
+        for (var j = 0, jj = ends.length; j < jj; ++j) {
+          ends[j] -= offset;
+        }
+      }
+      var polygon = new geom_Polygon(flatCoordinates.slice(offset, end), layout, ends);
+      polygons.push(polygon);
+      offset = end;
+    }
+    return polygons;
+  };
+
+  /**
+   * @inheritDoc
+   * @api
+   */
+  MultiPolygon.prototype.getType = function getType () {
+    return GeometryType.MULTI_POLYGON;
+  };
+
+  /**
+   * @inheritDoc
+   * @api
+   */
+  MultiPolygon.prototype.intersectsExtent = function intersectsExtent (extent) {
+    return intersectsLinearRingMultiArray(
+      this.getOrientedFlatCoordinates(), 0, this.endss_, this.stride, extent);
+  };
+
+  /**
+   * Set the coordinates of the multipolygon.
+   * @param {!Array<Array<Array<import("../coordinate.js").Coordinate>>>} coordinates Coordinates.
+   * @param {GeometryLayout=} opt_layout Layout.
+   * @override
+   * @api
+   */
+  MultiPolygon.prototype.setCoordinates = function setCoordinates (coordinates, opt_layout) {
+    this.setLayout(opt_layout, coordinates, 3);
+    if (!this.flatCoordinates) {
+      this.flatCoordinates = [];
+    }
+    var endss = deflateMultiCoordinatesArray(
+      this.flatCoordinates, 0, coordinates, this.stride, this.endss_);
+    if (endss.length === 0) {
+      this.flatCoordinates.length = 0;
+    } else {
+      var lastEnds = endss[endss.length - 1];
+      this.flatCoordinates.length = lastEnds.length === 0 ?
+        0 : lastEnds[lastEnds.length - 1];
+    }
+    this.changed();
+  };
+
+  return MultiPolygon;
+}(geom_SimpleGeometry));
+
+
+/* harmony default export */ var geom_MultiPolygon = (MultiPolygon_MultiPolygon);
+
+//# sourceMappingURL=MultiPolygon.js.map
+// CONCATENATED MODULE: ./node_modules/ol/style/Image.js
+/**
+ * @module ol/style/Image
+ */
+
+
+
+/**
+ * @typedef {Object} Options
+ * @property {number} opacity
+ * @property {boolean} rotateWithView
+ * @property {number} rotation
+ * @property {number} scale
+ */
+
+
+/**
+ * @classdesc
+ * A base class used for creating subclasses and not instantiated in
+ * apps. Base class for {@link module:ol/style/Icon~Icon}, {@link module:ol/style/Circle~CircleStyle} and
+ * {@link module:ol/style/RegularShape~RegularShape}.
+ * @abstract
+ * @api
+ */
+var Image_ImageStyle = function ImageStyle(options) {
+
+  /**
+   * @private
+   * @type {number}
+   */
+  this.opacity_ = options.opacity;
+
+  /**
+   * @private
+   * @type {boolean}
+   */
+  this.rotateWithView_ = options.rotateWithView;
+
+  /**
+   * @private
+   * @type {number}
+   */
+  this.rotation_ = options.rotation;
+
+  /**
+   * @private
+   * @type {number}
+   */
+  this.scale_ = options.scale;
+
+};
+
+/**
+ * Clones the style.
+ * @return {ImageStyle} The cloned style.
+ * @api
+ */
+Image_ImageStyle.prototype.clone = function clone () {
+  return new Image_ImageStyle({
+    opacity: this.getOpacity(),
+    scale: this.getScale(),
+    rotation: this.getRotation(),
+    rotateWithView: this.getRotateWithView()
+  });
+};
+
+/**
+ * Get the symbolizer opacity.
+ * @return {number} Opacity.
+ * @api
+ */
+Image_ImageStyle.prototype.getOpacity = function getOpacity () {
+  return this.opacity_;
+};
+
+/**
+ * Determine whether the symbolizer rotates with the map.
+ * @return {boolean} Rotate with map.
+ * @api
+ */
+Image_ImageStyle.prototype.getRotateWithView = function getRotateWithView () {
+  return this.rotateWithView_;
+};
+
+/**
+ * Get the symoblizer rotation.
+ * @return {number} Rotation.
+ * @api
+ */
+Image_ImageStyle.prototype.getRotation = function getRotation () {
+  return this.rotation_;
+};
+
+/**
+ * Get the symbolizer scale.
+ * @return {number} Scale.
+ * @api
+ */
+Image_ImageStyle.prototype.getScale = function getScale () {
+  return this.scale_;
+};
+
+/**
+ * This method is deprecated and always returns false.
+ * @return {boolean} false.
+ * @deprecated
+ * @api
+ */
+Image_ImageStyle.prototype.getSnapToPixel = function getSnapToPixel () {
+  return false;
+};
+
+/**
+ * Get the anchor point in pixels. The anchor determines the center point for the
+ * symbolizer.
+ * @abstract
+ * @return {Array<number>} Anchor.
+ */
+Image_ImageStyle.prototype.getAnchor = function getAnchor () {
+  return Object(util["b" /* abstract */])();
+};
+
+/**
+ * Get the image element for the symbolizer.
+ * @abstract
+ * @param {number} pixelRatio Pixel ratio.
+ * @return {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement} Image element.
+ */
+Image_ImageStyle.prototype.getImage = function getImage (pixelRatio) {
+  return Object(util["b" /* abstract */])();
+};
+
+/**
+ * @abstract
+ * @param {number} pixelRatio Pixel ratio.
+ * @return {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement} Image element.
+ */
+Image_ImageStyle.prototype.getHitDetectionImage = function getHitDetectionImage (pixelRatio) {
+  return Object(util["b" /* abstract */])();
+};
+
+/**
+ * @abstract
+ * @return {import("../ImageState.js").default} Image state.
+ */
+Image_ImageStyle.prototype.getImageState = function getImageState () {
+  return Object(util["b" /* abstract */])();
+};
+
+/**
+ * @abstract
+ * @return {import("../size.js").Size} Image size.
+ */
+Image_ImageStyle.prototype.getImageSize = function getImageSize () {
+  return Object(util["b" /* abstract */])();
+};
+
+/**
+ * @abstract
+ * @return {import("../size.js").Size} Size of the hit-detection image.
+ */
+Image_ImageStyle.prototype.getHitDetectionImageSize = function getHitDetectionImageSize () {
+  return Object(util["b" /* abstract */])();
+};
+
+/**
+ * Get the origin of the symbolizer.
+ * @abstract
+ * @return {Array<number>} Origin.
+ */
+Image_ImageStyle.prototype.getOrigin = function getOrigin () {
+  return Object(util["b" /* abstract */])();
+};
+
+/**
+ * Get the size of the symbolizer (in pixels).
+ * @abstract
+ * @return {import("../size.js").Size} Size.
+ */
+Image_ImageStyle.prototype.getSize = function getSize () {
+  return Object(util["b" /* abstract */])();
+};
+
+/**
+ * Set the opacity.
+ *
+ * @param {number} opacity Opacity.
+ * @api
+ */
+Image_ImageStyle.prototype.setOpacity = function setOpacity (opacity) {
+  this.opacity_ = opacity;
+};
+
+/**
+ * Set whether to rotate the style with the view.
+ *
+ * @param {boolean} rotateWithView Rotate with map.
+ * @api
+ */
+Image_ImageStyle.prototype.setRotateWithView = function setRotateWithView (rotateWithView) {
+  this.rotateWithView_ = rotateWithView;
+};
+
+/**
+ * Set the rotation.
+ *
+ * @param {number} rotation Rotation.
+ * @api
+ */
+Image_ImageStyle.prototype.setRotation = function setRotation (rotation) {
+  this.rotation_ = rotation;
+};
+/**
+ * Set the scale.
+ *
+ * @param {number} scale Scale.
+ * @api
+ */
+Image_ImageStyle.prototype.setScale = function setScale (scale) {
+  this.scale_ = scale;
+};
+
+/**
+ * This method is deprecated and does nothing.
+ * @param {boolean} snapToPixel Snap to pixel?
+ * @deprecated
+ * @api
+ */
+Image_ImageStyle.prototype.setSnapToPixel = function setSnapToPixel (snapToPixel) {};
+
+/**
+ * @abstract
+ * @param {function(this: T, import("../events/Event.js").default)} listener Listener function.
+ * @param {T} thisArg Value to use as `this` when executing `listener`.
+ * @return {import("../events.js").EventsKey|undefined} Listener key.
+ * @template T
+ */
+Image_ImageStyle.prototype.listenImageChange = function listenImageChange (listener, thisArg) {
+  return Object(util["b" /* abstract */])();
+};
+
+/**
+ * Load not yet loaded URI.
+ * @abstract
+ */
+Image_ImageStyle.prototype.load = function load () {
+  Object(util["b" /* abstract */])();
+};
+
+/**
+ * @abstract
+ * @param {function(this: T, import("../events/Event.js").default)} listener Listener function.
+ * @param {T} thisArg Value to use as `this` when executing `listener`.
+ * @template T
+ */
+Image_ImageStyle.prototype.unlistenImageChange = function unlistenImageChange (listener, thisArg) {
+  Object(util["b" /* abstract */])();
+};
+
+/* harmony default export */ var style_Image = (Image_ImageStyle);
+
+//# sourceMappingURL=Image.js.map
+// CONCATENATED MODULE: ./node_modules/ol/style/RegularShape.js
+/**
+ * @module ol/style/RegularShape
+ */
+
+
+
+
+
+
+
+
+
+
+/**
+ * Specify radius for regular polygons, or radius1 and radius2 for stars.
+ * @typedef {Object} Options
+ * @property {import("./Fill.js").default} [fill] Fill style.
+ * @property {number} points Number of points for stars and regular polygons. In case of a polygon, the number of points
+ * is the number of sides.
+ * @property {number} [radius] Radius of a regular polygon.
+ * @property {number} [radius1] Outer radius of a star.
+ * @property {number} [radius2] Inner radius of a star.
+ * @property {number} [angle=0] Shape's angle in radians. A value of 0 will have one of the shape's point facing up.
+ * @property {import("./Stroke.js").default} [stroke] Stroke style.
+ * @property {number} [rotation=0] Rotation in radians (positive rotation clockwise).
+ * @property {boolean} [rotateWithView=false] Whether to rotate the shape with the view.
+ * @property {import("./AtlasManager.js").default} [atlasManager] The atlas manager to use for this symbol. When
+ * using WebGL it is recommended to use an atlas manager to avoid texture switching. If an atlas manager is given, the
+ * symbol is added to an atlas. By default no atlas manager is used.
+ */
+
+
+/**
+ * @typedef {Object} RenderOptions
+ * @property {import("../colorlike.js").ColorLike} [strokeStyle]
+ * @property {number} strokeWidth
+ * @property {number} size
+ * @property {string} lineCap
+ * @property {Array<number>} lineDash
+ * @property {number} lineDashOffset
+ * @property {string} lineJoin
+ * @property {number} miterLimit
+ */
+
+
+/**
+ * @classdesc
+ * Set regular shape style for vector features. The resulting shape will be
+ * a regular polygon when `radius` is provided, or a star when `radius1` and
+ * `radius2` are provided.
+ * @api
+ */
+var RegularShape_RegularShape = /*@__PURE__*/(function (ImageStyle) {
+  function RegularShape(options) {
+    /**
+     * @type {boolean}
+     */
+    var rotateWithView = options.rotateWithView !== undefined ?
+      options.rotateWithView : false;
+
+    ImageStyle.call(this, {
+      opacity: 1,
+      rotateWithView: rotateWithView,
+      rotation: options.rotation !== undefined ? options.rotation : 0,
+      scale: 1
+    });
+
+    /**
+     * @private
+     * @type {Array<string|number>}
+     */
+    this.checksums_ = null;
+
+    /**
+     * @private
+     * @type {HTMLCanvasElement}
+     */
+    this.canvas_ = null;
+
+    /**
+     * @private
+     * @type {HTMLCanvasElement}
+     */
+    this.hitDetectionCanvas_ = null;
+
+    /**
+     * @private
+     * @type {import("./Fill.js").default}
+     */
+    this.fill_ = options.fill !== undefined ? options.fill : null;
+
+    /**
+     * @private
+     * @type {Array<number>}
+     */
+    this.origin_ = [0, 0];
+
+    /**
+     * @private
+     * @type {number}
+     */
+    this.points_ = options.points;
+
+    /**
+     * @protected
+     * @type {number}
+     */
+    this.radius_ = /** @type {number} */ (options.radius !== undefined ?
+      options.radius : options.radius1);
+
+    /**
+     * @private
+     * @type {number|undefined}
+     */
+    this.radius2_ = options.radius2;
+
+    /**
+     * @private
+     * @type {number}
+     */
+    this.angle_ = options.angle !== undefined ? options.angle : 0;
+
+    /**
+     * @private
+     * @type {import("./Stroke.js").default}
+     */
+    this.stroke_ = options.stroke !== undefined ? options.stroke : null;
+
+    /**
+     * @private
+     * @type {Array<number>}
+     */
+    this.anchor_ = null;
+
+    /**
+     * @private
+     * @type {import("../size.js").Size}
+     */
+    this.size_ = null;
+
+    /**
+     * @private
+     * @type {import("../size.js").Size}
+     */
+    this.imageSize_ = null;
+
+    /**
+     * @private
+     * @type {import("../size.js").Size}
+     */
+    this.hitDetectionImageSize_ = null;
+
+    /**
+     * @protected
+     * @type {import("./AtlasManager.js").default|undefined}
+     */
+    this.atlasManager_ = options.atlasManager;
+
+    this.render_(this.atlasManager_);
+
+  }
+
+  if ( ImageStyle ) RegularShape.__proto__ = ImageStyle;
+  RegularShape.prototype = Object.create( ImageStyle && ImageStyle.prototype );
+  RegularShape.prototype.constructor = RegularShape;
+
+  /**
+   * Clones the style. If an atlasmanager was provided to the original style it will be used in the cloned style, too.
+   * @return {RegularShape} The cloned style.
+   * @api
+   */
+  RegularShape.prototype.clone = function clone () {
+    var style = new RegularShape({
+      fill: this.getFill() ? this.getFill().clone() : undefined,
+      points: this.getPoints(),
+      radius: this.getRadius(),
+      radius2: this.getRadius2(),
+      angle: this.getAngle(),
+      stroke: this.getStroke() ? this.getStroke().clone() : undefined,
+      rotation: this.getRotation(),
+      rotateWithView: this.getRotateWithView(),
+      atlasManager: this.atlasManager_
+    });
+    style.setOpacity(this.getOpacity());
+    style.setScale(this.getScale());
+    return style;
+  };
+
+  /**
+   * @inheritDoc
+   * @api
+   */
+  RegularShape.prototype.getAnchor = function getAnchor () {
+    return this.anchor_;
+  };
+
+  /**
+   * Get the angle used in generating the shape.
+   * @return {number} Shape's rotation in radians.
+   * @api
+   */
+  RegularShape.prototype.getAngle = function getAngle () {
+    return this.angle_;
+  };
+
+  /**
+   * Get the fill style for the shape.
+   * @return {import("./Fill.js").default} Fill style.
+   * @api
+   */
+  RegularShape.prototype.getFill = function getFill () {
+    return this.fill_;
+  };
+
+  /**
+   * @inheritDoc
+   */
+  RegularShape.prototype.getHitDetectionImage = function getHitDetectionImage (pixelRatio) {
+    return this.hitDetectionCanvas_;
+  };
+
+  /**
+   * @inheritDoc
+   * @api
+   */
+  RegularShape.prototype.getImage = function getImage (pixelRatio) {
+    return this.canvas_;
+  };
+
+  /**
+   * @inheritDoc
+   */
+  RegularShape.prototype.getImageSize = function getImageSize () {
+    return this.imageSize_;
+  };
+
+  /**
+   * @inheritDoc
+   */
+  RegularShape.prototype.getHitDetectionImageSize = function getHitDetectionImageSize () {
+    return this.hitDetectionImageSize_;
+  };
+
+  /**
+   * @inheritDoc
+   */
+  RegularShape.prototype.getImageState = function getImageState () {
+    return ImageState.LOADED;
+  };
+
+  /**
+   * @inheritDoc
+   * @api
+   */
+  RegularShape.prototype.getOrigin = function getOrigin () {
+    return this.origin_;
+  };
+
+  /**
+   * Get the number of points for generating the shape.
+   * @return {number} Number of points for stars and regular polygons.
+   * @api
+   */
+  RegularShape.prototype.getPoints = function getPoints () {
+    return this.points_;
+  };
+
+  /**
+   * Get the (primary) radius for the shape.
+   * @return {number} Radius.
+   * @api
+   */
+  RegularShape.prototype.getRadius = function getRadius () {
+    return this.radius_;
+  };
+
+  /**
+   * Get the secondary radius for the shape.
+   * @return {number|undefined} Radius2.
+   * @api
+   */
+  RegularShape.prototype.getRadius2 = function getRadius2 () {
+    return this.radius2_;
+  };
+
+  /**
+   * @inheritDoc
+   * @api
+   */
+  RegularShape.prototype.getSize = function getSize () {
+    return this.size_;
+  };
+
+  /**
+   * Get the stroke style for the shape.
+   * @return {import("./Stroke.js").default} Stroke style.
+   * @api
+   */
+  RegularShape.prototype.getStroke = function getStroke () {
+    return this.stroke_;
+  };
+
+  /**
+   * @inheritDoc
+   */
+  RegularShape.prototype.listenImageChange = function listenImageChange (listener, thisArg) {
+    return undefined;
+  };
+
+  /**
+   * @inheritDoc
+   */
+  RegularShape.prototype.load = function load () {};
+
+  /**
+   * @inheritDoc
+   */
+  RegularShape.prototype.unlistenImageChange = function unlistenImageChange (listener, thisArg) {};
+
+  /**
+   * @protected
+   * @param {import("./AtlasManager.js").default|undefined} atlasManager An atlas manager.
+   */
+  RegularShape.prototype.render_ = function render_ (atlasManager) {
+    var imageSize;
+    var lineCap = '';
+    var lineJoin = '';
+    var miterLimit = 0;
+    var lineDash = null;
+    var lineDashOffset = 0;
+    var strokeStyle;
+    var strokeWidth = 0;
+
+    if (this.stroke_) {
+      strokeStyle = this.stroke_.getColor();
+      if (strokeStyle === null) {
+        strokeStyle = defaultStrokeStyle;
+      }
+      strokeStyle = asColorLike(strokeStyle);
+      strokeWidth = this.stroke_.getWidth();
+      if (strokeWidth === undefined) {
+        strokeWidth = defaultLineWidth;
+      }
+      lineDash = this.stroke_.getLineDash();
+      lineDashOffset = this.stroke_.getLineDashOffset();
+      if (!CANVAS_LINE_DASH) {
+        lineDash = null;
+        lineDashOffset = 0;
+      }
+      lineJoin = this.stroke_.getLineJoin();
+      if (lineJoin === undefined) {
+        lineJoin = defaultLineJoin;
+      }
+      lineCap = this.stroke_.getLineCap();
+      if (lineCap === undefined) {
+        lineCap = defaultLineCap;
+      }
+      miterLimit = this.stroke_.getMiterLimit();
+      if (miterLimit === undefined) {
+        miterLimit = defaultMiterLimit;
+      }
+    }
+
+    var size = 2 * (this.radius_ + strokeWidth) + 1;
+
+    /** @type {RenderOptions} */
+    var renderOptions = {
+      strokeStyle: strokeStyle,
+      strokeWidth: strokeWidth,
+      size: size,
+      lineCap: lineCap,
+      lineDash: lineDash,
+      lineDashOffset: lineDashOffset,
+      lineJoin: lineJoin,
+      miterLimit: miterLimit
+    };
+
+    if (atlasManager === undefined) {
+      // no atlas manager is used, create a new canvas
+      var context = Object(dom["a" /* createCanvasContext2D */])(size, size);
+      this.canvas_ = context.canvas;
+
+      // canvas.width and height are rounded to the closest integer
+      size = this.canvas_.width;
+      imageSize = size;
+
+      this.draw_(renderOptions, context, 0, 0);
+
+      this.createHitDetectionCanvas_(renderOptions);
+    } else {
+      // an atlas manager is used, add the symbol to an atlas
+      size = Math.round(size);
+
+      var hasCustomHitDetectionImage = !this.fill_;
+      var renderHitDetectionCallback;
+      if (hasCustomHitDetectionImage) {
+        // render the hit-detection image into a separate atlas image
+        renderHitDetectionCallback =
+            this.drawHitDetectionCanvas_.bind(this, renderOptions);
+      }
+
+      var id = this.getChecksum();
+      var info = atlasManager.add(
+        id, size, size, this.draw_.bind(this, renderOptions),
+        renderHitDetectionCallback);
+
+      this.canvas_ = info.image;
+      this.origin_ = [info.offsetX, info.offsetY];
+      imageSize = info.image.width;
+
+      if (hasCustomHitDetectionImage) {
+        this.hitDetectionCanvas_ = info.hitImage;
+        this.hitDetectionImageSize_ =
+            [info.hitImage.width, info.hitImage.height];
+      } else {
+        this.hitDetectionCanvas_ = this.canvas_;
+        this.hitDetectionImageSize_ = [imageSize, imageSize];
+      }
+    }
+
+    this.anchor_ = [size / 2, size / 2];
+    this.size_ = [size, size];
+    this.imageSize_ = [imageSize, imageSize];
+  };
+
+  /**
+   * @private
+   * @param {RenderOptions} renderOptions Render options.
+   * @param {CanvasRenderingContext2D} context The rendering context.
+   * @param {number} x The origin for the symbol (x).
+   * @param {number} y The origin for the symbol (y).
+   */
+  RegularShape.prototype.draw_ = function draw_ (renderOptions, context, x, y) {
+    var i, angle0, radiusC;
+    // reset transform
+    context.setTransform(1, 0, 0, 1, 0, 0);
+
+    // then move to (x, y)
+    context.translate(x, y);
+
+    context.beginPath();
+
+    var points = this.points_;
+    if (points === Infinity) {
+      context.arc(
+        renderOptions.size / 2, renderOptions.size / 2,
+        this.radius_, 0, 2 * Math.PI, true);
+    } else {
+      var radius2 = (this.radius2_ !== undefined) ? this.radius2_
+        : this.radius_;
+      if (radius2 !== this.radius_) {
+        points = 2 * points;
+      }
+      for (i = 0; i <= points; i++) {
+        angle0 = i * 2 * Math.PI / points - Math.PI / 2 + this.angle_;
+        radiusC = i % 2 === 0 ? this.radius_ : radius2;
+        context.lineTo(renderOptions.size / 2 + radiusC * Math.cos(angle0),
+          renderOptions.size / 2 + radiusC * Math.sin(angle0));
+      }
+    }
+
+
+    if (this.fill_) {
+      var color = this.fill_.getColor();
+      if (color === null) {
+        color = defaultFillStyle;
+      }
+      context.fillStyle = asColorLike(color);
+      context.fill();
+    }
+    if (this.stroke_) {
+      context.strokeStyle = renderOptions.strokeStyle;
+      context.lineWidth = renderOptions.strokeWidth;
+      if (renderOptions.lineDash) {
+        context.setLineDash(renderOptions.lineDash);
+        context.lineDashOffset = renderOptions.lineDashOffset;
+      }
+      context.lineCap = /** @type {CanvasLineCap} */ (renderOptions.lineCap);
+      context.lineJoin = /** @type {CanvasLineJoin} */ (renderOptions.lineJoin);
+      context.miterLimit = renderOptions.miterLimit;
+      context.stroke();
+    }
+    context.closePath();
+  };
+
+  /**
+   * @private
+   * @param {RenderOptions} renderOptions Render options.
+   */
+  RegularShape.prototype.createHitDetectionCanvas_ = function createHitDetectionCanvas_ (renderOptions) {
+    this.hitDetectionImageSize_ = [renderOptions.size, renderOptions.size];
+    if (this.fill_) {
+      this.hitDetectionCanvas_ = this.canvas_;
+      return;
+    }
+
+    // if no fill style is set, create an extra hit-detection image with a
+    // default fill style
+    var context = Object(dom["a" /* createCanvasContext2D */])(renderOptions.size, renderOptions.size);
+    this.hitDetectionCanvas_ = context.canvas;
+
+    this.drawHitDetectionCanvas_(renderOptions, context, 0, 0);
+  };
+
+  /**
+   * @private
+   * @param {RenderOptions} renderOptions Render options.
+   * @param {CanvasRenderingContext2D} context The context.
+   * @param {number} x The origin for the symbol (x).
+   * @param {number} y The origin for the symbol (y).
+   */
+  RegularShape.prototype.drawHitDetectionCanvas_ = function drawHitDetectionCanvas_ (renderOptions, context, x, y) {
+    // reset transform
+    context.setTransform(1, 0, 0, 1, 0, 0);
+
+    // then move to (x, y)
+    context.translate(x, y);
+
+    context.beginPath();
+
+    var points = this.points_;
+    if (points === Infinity) {
+      context.arc(
+        renderOptions.size / 2, renderOptions.size / 2,
+        this.radius_, 0, 2 * Math.PI, true);
+    } else {
+      var radius2 = (this.radius2_ !== undefined) ? this.radius2_
+        : this.radius_;
+      if (radius2 !== this.radius_) {
+        points = 2 * points;
+      }
+      var i, radiusC, angle0;
+      for (i = 0; i <= points; i++) {
+        angle0 = i * 2 * Math.PI / points - Math.PI / 2 + this.angle_;
+        radiusC = i % 2 === 0 ? this.radius_ : radius2;
+        context.lineTo(renderOptions.size / 2 + radiusC * Math.cos(angle0),
+          renderOptions.size / 2 + radiusC * Math.sin(angle0));
+      }
+    }
+
+    context.fillStyle = asString(defaultFillStyle);
+    context.fill();
+    if (this.stroke_) {
+      context.strokeStyle = renderOptions.strokeStyle;
+      context.lineWidth = renderOptions.strokeWidth;
+      if (renderOptions.lineDash) {
+        context.setLineDash(renderOptions.lineDash);
+        context.lineDashOffset = renderOptions.lineDashOffset;
+      }
+      context.stroke();
+    }
+    context.closePath();
+  };
+
+  /**
+   * @return {string} The checksum.
+   */
+  RegularShape.prototype.getChecksum = function getChecksum () {
+    var strokeChecksum = this.stroke_ ?
+      this.stroke_.getChecksum() : '-';
+    var fillChecksum = this.fill_ ?
+      this.fill_.getChecksum() : '-';
+
+    var recalculate = !this.checksums_ ||
+        (strokeChecksum != this.checksums_[1] ||
+        fillChecksum != this.checksums_[2] ||
+        this.radius_ != this.checksums_[3] ||
+        this.radius2_ != this.checksums_[4] ||
+        this.angle_ != this.checksums_[5] ||
+        this.points_ != this.checksums_[6]);
+
+    if (recalculate) {
+      var checksum = 'r' + strokeChecksum + fillChecksum +
+          (this.radius_ !== undefined ? this.radius_.toString() : '-') +
+          (this.radius2_ !== undefined ? this.radius2_.toString() : '-') +
+          (this.angle_ !== undefined ? this.angle_.toString() : '-') +
+          (this.points_ !== undefined ? this.points_.toString() : '-');
+      this.checksums_ = [checksum, strokeChecksum, fillChecksum,
+        this.radius_, this.radius2_, this.angle_, this.points_];
+    }
+
+    return /** @type {string} */ (this.checksums_[0]);
+  };
+
+  return RegularShape;
+}(style_Image));
+
+
+/* harmony default export */ var style_RegularShape = (RegularShape_RegularShape);
+
+//# sourceMappingURL=RegularShape.js.map
+// CONCATENATED MODULE: ./node_modules/ol/style/Circle.js
+/**
+ * @module ol/style/Circle
+ */
+
+
+
+
+/**
+ * @typedef {Object} Options
+ * @property {import("./Fill.js").default} [fill] Fill style.
+ * @property {number} radius Circle radius.
+ * @property {import("./Stroke.js").default} [stroke] Stroke style.
+ * @property {import("./AtlasManager.js").default} [atlasManager] The atlas manager to use for this circle.
+ * When using WebGL it is recommended to use an atlas manager to avoid texture switching. If an atlas manager is given,
+ * the circle is added to an atlas. By default no atlas manager is used.
+ */
+
+
+/**
+ * @classdesc
+ * Set circle style for vector features.
+ * @api
+ */
+var CircleStyle = /*@__PURE__*/(function (RegularShape) {
+  function CircleStyle(opt_options) {
+
+    var options = opt_options || /** @type {Options} */ ({});
+
+    RegularShape.call(this, {
+      points: Infinity,
+      fill: options.fill,
+      radius: options.radius,
+      stroke: options.stroke,
+      atlasManager: options.atlasManager
+    });
+
+  }
+
+  if ( RegularShape ) CircleStyle.__proto__ = RegularShape;
+  CircleStyle.prototype = Object.create( RegularShape && RegularShape.prototype );
+  CircleStyle.prototype.constructor = CircleStyle;
+
+  /**
+  * Clones the style.  If an atlasmanager was provided to the original style it will be used in the cloned style, too.
+  * @return {CircleStyle} The cloned style.
+  * @override
+  * @api
+  */
+  CircleStyle.prototype.clone = function clone () {
+    var style = new CircleStyle({
+      fill: this.getFill() ? this.getFill().clone() : undefined,
+      stroke: this.getStroke() ? this.getStroke().clone() : undefined,
+      radius: this.getRadius(),
+      atlasManager: this.atlasManager_
+    });
+    style.setOpacity(this.getOpacity());
+    style.setScale(this.getScale());
+    return style;
+  };
+
+  /**
+  * Set the circle radius.
+  *
+  * @param {number} radius Circle radius.
+  * @api
+  */
+  CircleStyle.prototype.setRadius = function setRadius (radius) {
+    this.radius_ = radius;
+    this.render_(this.atlasManager_);
+  };
+
+  return CircleStyle;
+}(style_RegularShape));
+
+
+/* harmony default export */ var style_Circle = (CircleStyle);
+
+//# sourceMappingURL=Circle.js.map
+// CONCATENATED MODULE: ./node_modules/ol/style/Fill.js
+/**
+ * @module ol/style/Fill
+ */
+
+
+
+
+/**
+ * @typedef {Object} Options
+ * @property {import("../color.js").Color|import("../colorlike.js").ColorLike} [color] A color, gradient or pattern.
+ * See {@link module:ol/color~Color} and {@link module:ol/colorlike~ColorLike} for possible formats.
+ * Default null; if null, the Canvas/renderer default black will be used.
+ */
+
+
+/**
+ * @classdesc
+ * Set fill style for vector features.
+ * @api
+ */
+var Fill = function Fill(opt_options) {
+
+  var options = opt_options || {};
+
+  /**
+   * @private
+   * @type {import("../color.js").Color|import("../colorlike.js").ColorLike}
+   */
+  this.color_ = options.color !== undefined ? options.color : null;
+
+  /**
+   * @private
+   * @type {string|undefined}
+   */
+  this.checksum_ = undefined;
+};
+
+/**
+ * Clones the style. The color is not cloned if it is an {@link module:ol/colorlike~ColorLike}.
+ * @return {Fill} The cloned style.
+ * @api
+ */
+Fill.prototype.clone = function clone () {
+  var color = this.getColor();
+  return new Fill({
+    color: Array.isArray(color) ? color.slice() : color || undefined
+  });
+};
+
+/**
+ * Get the fill color.
+ * @return {import("../color.js").Color|import("../colorlike.js").ColorLike} Color.
+ * @api
+ */
+Fill.prototype.getColor = function getColor () {
+  return this.color_;
+};
+
+/**
+ * Set the color.
+ *
+ * @param {import("../color.js").Color|import("../colorlike.js").ColorLike} color Color.
+ * @api
+ */
+Fill.prototype.setColor = function setColor (color) {
+  this.color_ = color;
+  this.checksum_ = undefined;
+};
+
+/**
+ * @return {string} The checksum.
+ */
+Fill.prototype.getChecksum = function getChecksum () {
+  if (this.checksum_ === undefined) {
+    var color = this.color_;
+    if (color) {
+      if (Array.isArray(color) || typeof color == 'string') {
+        this.checksum_ = 'f' + asString(/** @type {import("../color.js").Color|string} */ (color));
+      } else {
+        this.checksum_ = Object(util["c" /* getUid */])(this.color_);
+      }
+    } else {
+      this.checksum_ = 'f-';
+    }
+  }
+
+  return this.checksum_;
+};
+
+/* harmony default export */ var style_Fill = (Fill);
+
+//# sourceMappingURL=Fill.js.map
+// CONCATENATED MODULE: ./node_modules/ol/style/Style.js
+/**
+ * @module ol/style/Style
+ */
+
+/**
+ * Feature styles.
+ *
+ * If no style is defined, the following default style is used:
+ * ```js
+ *  import {Fill, Stroke, Circle, Style} from 'ol/style';
+ *
+ *  var fill = new Fill({
+ *    color: 'rgba(255,255,255,0.4)'
+ *  });
+ *  var stroke = new Stroke({
+ *    color: '#3399CC',
+ *    width: 1.25
+ *  });
+ *  var styles = [
+ *    new Style({
+ *      image: new Circle({
+ *        fill: fill,
+ *        stroke: stroke,
+ *        radius: 5
+ *      }),
+ *      fill: fill,
+ *      stroke: stroke
+ *    })
+ *  ];
+ * ```
+ *
+ * A separate editing style has the following defaults:
+ * ```js
+ *  import {Fill, Stroke, Circle, Style} from 'ol/style';
+ *  import GeometryType from 'ol/geom/GeometryType';
+ *
+ *  var white = [255, 255, 255, 1];
+ *  var blue = [0, 153, 255, 1];
+ *  var width = 3;
+ *  styles[GeometryType.POLYGON] = [
+ *    new Style({
+ *      fill: new Fill({
+ *        color: [255, 255, 255, 0.5]
+ *      })
+ *    })
+ *  ];
+ *  styles[GeometryType.MULTI_POLYGON] =
+ *      styles[GeometryType.POLYGON];
+ *  styles[GeometryType.LINE_STRING] = [
+ *    new Style({
+ *      stroke: new Stroke({
+ *        color: white,
+ *        width: width + 2
+ *      })
+ *    }),
+ *    new Style({
+ *      stroke: new Stroke({
+ *        color: blue,
+ *        width: width
+ *      })
+ *    })
+ *  ];
+ *  styles[GeometryType.MULTI_LINE_STRING] =
+ *      styles[GeometryType.LINE_STRING];
+ *  styles[GeometryType.POINT] = [
+ *    new Style({
+ *      image: new Circle({
+ *        radius: width * 2,
+ *        fill: new Fill({
+ *          color: blue
+ *        }),
+ *        stroke: new Stroke({
+ *          color: white,
+ *          width: width / 2
+ *        })
+ *      }),
+ *      zIndex: Infinity
+ *    })
+ *  ];
+ *  styles[GeometryType.MULTI_POINT] =
+ *      styles[GeometryType.POINT];
+ *  styles[GeometryType.GEOMETRY_COLLECTION] =
+ *      styles[GeometryType.POLYGON].concat(
+ *          styles[GeometryType.LINE_STRING],
+ *          styles[GeometryType.POINT]
+ *      );
+ * ```
+ */
+
+
+
+
+
+
+
+/**
+ * A function that takes an {@link module:ol/Feature} and a `{number}`
+ * representing the view's resolution. The function should return a
+ * {@link module:ol/style/Style} or an array of them. This way e.g. a
+ * vector layer can be styled.
+ *
+ * @typedef {function(import("../Feature.js").FeatureLike, number):(Style|Array<Style>)} StyleFunction
+ */
+
+/**
+ * A {@link Style}, an array of {@link Style}, or a {@link StyleFunction}.
+ * @typedef {Style|Array<Style>|StyleFunction} StyleLike
+ */
+
+/**
+ * A function that takes an {@link module:ol/Feature} as argument and returns an
+ * {@link module:ol/geom/Geometry} that will be rendered and styled for the feature.
+ *
+ * @typedef {function(import("../Feature.js").FeatureLike):
+ *     (import("../geom/Geometry.js").default|import("../render/Feature.js").default|undefined)} GeometryFunction
+ */
+
+
+/**
+ * Custom renderer function. Takes two arguments:
+ *
+ * 1. The pixel coordinates of the geometry in GeoJSON notation.
+ * 2. The {@link module:ol/render~State} of the layer renderer.
+ *
+ * @typedef {function((import("../coordinate.js").Coordinate|Array<import("../coordinate.js").Coordinate>|Array<Array<import("../coordinate.js").Coordinate>>),import("../render.js").State)}
+ * RenderFunction
+ */
+
+
+/**
+ * @typedef {Object} Options
+ * @property {string|import("../geom/Geometry.js").default|GeometryFunction} [geometry] Feature property or geometry
+ * or function returning a geometry to render for this style.
+ * @property {import("./Fill.js").default} [fill] Fill style.
+ * @property {import("./Image.js").default} [image] Image style.
+ * @property {RenderFunction} [renderer] Custom renderer. When configured, `fill`, `stroke` and `image` will be
+ * ignored, and the provided function will be called with each render frame for each geometry.
+ * @property {import("./Stroke.js").default} [stroke] Stroke style.
+ * @property {import("./Text.js").default} [text] Text style.
+ * @property {number} [zIndex] Z index.
+ */
+
+/**
+ * @classdesc
+ * Container for vector feature rendering styles. Any changes made to the style
+ * or its children through `set*()` methods will not take effect until the
+ * feature or layer that uses the style is re-rendered.
+ * @api
+ */
+var Style = function Style(opt_options) {
+
+  var options = opt_options || {};
+
+  /**
+   * @private
+   * @type {string|import("../geom/Geometry.js").default|GeometryFunction}
+   */
+  this.geometry_ = null;
+
+  /**
+   * @private
+   * @type {!GeometryFunction}
+   */
+  this.geometryFunction_ = defaultGeometryFunction;
+
+  if (options.geometry !== undefined) {
+    this.setGeometry(options.geometry);
+  }
+
+  /**
+   * @private
+   * @type {import("./Fill.js").default}
+   */
+  this.fill_ = options.fill !== undefined ? options.fill : null;
+
+  /**
+     * @private
+     * @type {import("./Image.js").default}
+     */
+  this.image_ = options.image !== undefined ? options.image : null;
+
+  /**
+   * @private
+   * @type {RenderFunction|null}
+   */
+  this.renderer_ = options.renderer !== undefined ? options.renderer : null;
+
+  /**
+   * @private
+   * @type {import("./Stroke.js").default}
+   */
+  this.stroke_ = options.stroke !== undefined ? options.stroke : null;
+
+  /**
+   * @private
+   * @type {import("./Text.js").default}
+   */
+  this.text_ = options.text !== undefined ? options.text : null;
+
+  /**
+   * @private
+   * @type {number|undefined}
+   */
+  this.zIndex_ = options.zIndex;
+
+};
+
+/**
+ * Clones the style.
+ * @return {Style} The cloned style.
+ * @api
+ */
+Style.prototype.clone = function clone () {
+  var geometry = this.getGeometry();
+  if (geometry && typeof geometry === 'object') {
+    geometry = /** @type {import("../geom/Geometry.js").default} */ (geometry).clone();
+  }
+  return new Style({
+    geometry: geometry,
+    fill: this.getFill() ? this.getFill().clone() : undefined,
+    image: this.getImage() ? this.getImage().clone() : undefined,
+    stroke: this.getStroke() ? this.getStroke().clone() : undefined,
+    text: this.getText() ? this.getText().clone() : undefined,
+    zIndex: this.getZIndex()
+  });
+};
+
+/**
+ * Get the custom renderer function that was configured with
+ * {@link #setRenderer} or the `renderer` constructor option.
+ * @return {RenderFunction|null} Custom renderer function.
+ * @api
+ */
+Style.prototype.getRenderer = function getRenderer () {
+  return this.renderer_;
+};
+
+/**
+ * Sets a custom renderer function for this style. When set, `fill`, `stroke`
+ * and `image` options of the style will be ignored.
+ * @param {RenderFunction|null} renderer Custom renderer function.
+ * @api
+ */
+Style.prototype.setRenderer = function setRenderer (renderer) {
+  this.renderer_ = renderer;
+};
+
+/**
+ * Get the geometry to be rendered.
+ * @return {string|import("../geom/Geometry.js").default|GeometryFunction}
+ * Feature property or geometry or function that returns the geometry that will
+ * be rendered with this style.
+ * @api
+ */
+Style.prototype.getGeometry = function getGeometry () {
+  return this.geometry_;
+};
+
+/**
+ * Get the function used to generate a geometry for rendering.
+ * @return {!GeometryFunction} Function that is called with a feature
+ * and returns the geometry to render instead of the feature's geometry.
+ * @api
+ */
+Style.prototype.getGeometryFunction = function getGeometryFunction () {
+  return this.geometryFunction_;
+};
+
+/**
+ * Get the fill style.
+ * @return {import("./Fill.js").default} Fill style.
+ * @api
+ */
+Style.prototype.getFill = function getFill () {
+  return this.fill_;
+};
+
+/**
+ * Set the fill style.
+ * @param {import("./Fill.js").default} fill Fill style.
+ * @api
+ */
+Style.prototype.setFill = function setFill (fill) {
+  this.fill_ = fill;
+};
+
+/**
+ * Get the image style.
+ * @return {import("./Image.js").default} Image style.
+ * @api
+ */
+Style.prototype.getImage = function getImage () {
+  return this.image_;
+};
+
+/**
+ * Set the image style.
+ * @param {import("./Image.js").default} image Image style.
+ * @api
+ */
+Style.prototype.setImage = function setImage (image) {
+  this.image_ = image;
+};
+
+/**
+ * Get the stroke style.
+ * @return {import("./Stroke.js").default} Stroke style.
+ * @api
+ */
+Style.prototype.getStroke = function getStroke () {
+  return this.stroke_;
+};
+
+/**
+ * Set the stroke style.
+ * @param {import("./Stroke.js").default} stroke Stroke style.
+ * @api
+ */
+Style.prototype.setStroke = function setStroke (stroke) {
+  this.stroke_ = stroke;
+};
+
+/**
+ * Get the text style.
+ * @return {import("./Text.js").default} Text style.
+ * @api
+ */
+Style.prototype.getText = function getText () {
+  return this.text_;
+};
+
+/**
+ * Set the text style.
+ * @param {import("./Text.js").default} text Text style.
+ * @api
+ */
+Style.prototype.setText = function setText (text) {
+  this.text_ = text;
+};
+
+/**
+ * Get the z-index for the style.
+ * @return {number|undefined} ZIndex.
+ * @api
+ */
+Style.prototype.getZIndex = function getZIndex () {
+  return this.zIndex_;
+};
+
+/**
+ * Set a geometry that is rendered instead of the feature's geometry.
+ *
+ * @param {string|import("../geom/Geometry.js").default|GeometryFunction} geometry
+ *   Feature property or geometry or function returning a geometry to render
+ *   for this style.
+ * @api
+ */
+Style.prototype.setGeometry = function setGeometry (geometry) {
+  if (typeof geometry === 'function') {
+    this.geometryFunction_ = geometry;
+  } else if (typeof geometry === 'string') {
+    this.geometryFunction_ = function(feature) {
+      return (
+        /** @type {import("../geom/Geometry.js").default} */ (feature.get(geometry))
+      );
+    };
+  } else if (!geometry) {
+    this.geometryFunction_ = defaultGeometryFunction;
+  } else if (geometry !== undefined) {
+    this.geometryFunction_ = function() {
+      return (
+        /** @type {import("../geom/Geometry.js").default} */ (geometry)
+      );
+    };
+  }
+  this.geometry_ = geometry;
+};
+
+/**
+ * Set the z-index.
+ *
+ * @param {number|undefined} zIndex ZIndex.
+ * @api
+ */
+Style.prototype.setZIndex = function setZIndex (zIndex) {
+  this.zIndex_ = zIndex;
+};
+
+
+/**
+ * Convert the provided object into a style function.  Functions passed through
+ * unchanged.  Arrays of Style or single style objects wrapped in a
+ * new style function.
+ * @param {StyleFunction|Array<Style>|Style} obj
+ *     A style function, a single style, or an array of styles.
+ * @return {StyleFunction} A style function.
+ */
+function toFunction(obj) {
+  var styleFunction;
+
+  if (typeof obj === 'function') {
+    styleFunction = obj;
+  } else {
+    /**
+     * @type {Array<Style>}
+     */
+    var styles;
+    if (Array.isArray(obj)) {
+      styles = obj;
+    } else {
+      assert(typeof /** @type {?} */ (obj).getZIndex === 'function',
+        41); // Expected an `Style` or an array of `Style`
+      var style = /** @type {Style} */ (obj);
+      styles = [style];
+    }
+    styleFunction = function() {
+      return styles;
+    };
+  }
+  return styleFunction;
+}
+
+
+/**
+ * @type {Array<Style>}
+ */
+var defaultStyles = null;
+
+
+/**
+ * @param {import("../Feature.js").FeatureLike} feature Feature.
+ * @param {number} resolution Resolution.
+ * @return {Array<Style>} Style.
+ */
+function createDefaultStyle(feature, resolution) {
+  // We don't use an immediately-invoked function
+  // and a closure so we don't get an error at script evaluation time in
+  // browsers that do not support Canvas. (import("./Circle.js").CircleStyle does
+  // canvas.getContext('2d') at construction time, which will cause an.error
+  // in such browsers.)
+  if (!defaultStyles) {
+    var fill = new style_Fill({
+      color: 'rgba(255,255,255,0.4)'
+    });
+    var stroke = new style_Stroke({
+      color: '#3399CC',
+      width: 1.25
+    });
+    defaultStyles = [
+      new Style({
+        image: new style_Circle({
+          fill: fill,
+          stroke: stroke,
+          radius: 5
+        }),
+        fill: fill,
+        stroke: stroke
+      })
+    ];
+  }
+  return defaultStyles;
+}
+
+
+/**
+ * Default styles for editing features.
+ * @return {Object<import("../geom/GeometryType.js").default, Array<Style>>} Styles
+ */
+function createEditingStyle() {
+  /** @type {Object<import("../geom/GeometryType.js").default, Array<Style>>} */
+  var styles = {};
+  var white = [255, 255, 255, 1];
+  var blue = [0, 153, 255, 1];
+  var width = 3;
+  styles[GeometryType.POLYGON] = [
+    new Style({
+      fill: new style_Fill({
+        color: [255, 255, 255, 0.5]
+      })
+    })
+  ];
+  styles[GeometryType.MULTI_POLYGON] =
+      styles[GeometryType.POLYGON];
+
+  styles[GeometryType.LINE_STRING] = [
+    new Style({
+      stroke: new style_Stroke({
+        color: white,
+        width: width + 2
+      })
+    }),
+    new Style({
+      stroke: new style_Stroke({
+        color: blue,
+        width: width
+      })
+    })
+  ];
+  styles[GeometryType.MULTI_LINE_STRING] =
+      styles[GeometryType.LINE_STRING];
+
+  styles[GeometryType.CIRCLE] =
+      styles[GeometryType.POLYGON].concat(
+        styles[GeometryType.LINE_STRING]
+      );
+
+
+  styles[GeometryType.POINT] = [
+    new Style({
+      image: new style_Circle({
+        radius: width * 2,
+        fill: new style_Fill({
+          color: blue
+        }),
+        stroke: new style_Stroke({
+          color: white,
+          width: width / 2
+        })
+      }),
+      zIndex: Infinity
+    })
+  ];
+  styles[GeometryType.MULTI_POINT] =
+      styles[GeometryType.POINT];
+
+  styles[GeometryType.GEOMETRY_COLLECTION] =
+      styles[GeometryType.POLYGON].concat(
+        styles[GeometryType.LINE_STRING],
+        styles[GeometryType.POINT]
+      );
+
+  return styles;
+}
+
+
+/**
+ * Function that is called with a feature and returns its default geometry.
+ * @param {import("../Feature.js").FeatureLike} feature Feature to get the geometry for.
+ * @return {import("../geom/Geometry.js").default|import("../render/Feature.js").default|undefined} Geometry to render.
+ */
+function defaultGeometryFunction(feature) {
+  return feature.getGeometry();
+}
+
+/* harmony default export */ var style_Style = (Style);
+
+//# sourceMappingURL=Style.js.map
+// CONCATENATED MODULE: ./node_modules/ol/layer/Vector.js
+/**
+ * @module ol/layer/Vector
+ */
+
+
+
+
+
+
+
+/**
+ * @typedef {Object} Options
+ * @property {number} [opacity=1] Opacity (0, 1).
+ * @property {boolean} [visible=true] Visibility.
+ * @property {import("../extent.js").Extent} [extent] The bounding extent for layer rendering.  The layer will not be
+ * rendered outside of this extent.
+ * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers
+ * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed
+ * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`
+ * method was used.
+ * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be
+ * visible.
+ * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will
+ * be visible.
+ * @property {import("../render.js").OrderFunction} [renderOrder] Render order. Function to be used when sorting
+ * features before rendering. By default features are drawn in the order that they are created. Use
+ * `null` to avoid the sort, but get an undefined draw order.
+ * @property {number} [renderBuffer=100] The buffer in pixels around the viewport extent used by the
+ * renderer when getting features from the vector source for the rendering or hit-detection.
+ * Recommended value: the size of the largest symbol, line width or label.
+ * @property {import("./VectorRenderType.js").default|string} [renderMode='vector'] Render mode for vector layers:
+ *  * `'image'`: Vector layers are rendered as images. Great performance, but point symbols and
+ *    texts are always rotated with the view and pixels are scaled during zoom animations.
+ *  * `'vector'`: Vector layers are rendered as vectors. Most accurate rendering even during
+ *    animations, but slower performance.
+ * @property {import("../source/Vector.js").default} [source] Source.
+ * @property {import("../PluggableMap.js").default} [map] Sets the layer as overlay on a map. The map will not manage
+ * this layer in its layers collection, and the layer will be rendered on top. This is useful for
+ * temporary layers. The standard way to add a layer to a map and have it managed by the map is to
+ * use {@link module:ol/Map#addLayer}.
+ * @property {boolean} [declutter=false] Declutter images and text. Decluttering is applied to all
+ * image and text styles, and the priority is defined by the z-index of the style. Lower z-index
+ * means higher priority.
+ * @property {import("../style/Style.js").StyleLike} [style] Layer style. See
+ * {@link module:ol/style} for default style which will be used if this is not defined.
+ * @property {boolean} [updateWhileAnimating=false] When set to `true` and `renderMode`
+ * is `vector`, feature batches will be recreated during animations. This means that no
+ * vectors will be shown clipped, but the setting will have a performance impact for large
+ * amounts of vector data. When set to `false`, batches will be recreated when no animation
+ * is active.
+ * @property {boolean} [updateWhileInteracting=false] When set to `true` and `renderMode`
+ * is `vector`, feature batches will be recreated during interactions. See also
+ * `updateWhileAnimating`.
+ */
+
+
+/**
+ * @enum {string}
+ * @private
+ */
+var Vector_Property = {
+  RENDER_ORDER: 'renderOrder'
+};
+
+
+/**
+ * @classdesc
+ * Vector data that is rendered client-side.
+ * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}
+ * property on the layer object; for example, setting `title: 'My Title'` in the
+ * options means that `title` is observable, and has get/set accessors.
+ *
+ * @api
+ */
+var Vector_VectorLayer = /*@__PURE__*/(function (Layer) {
+  function VectorLayer(opt_options) {
+    var options = opt_options ?
+      opt_options : /** @type {Options} */ ({});
+
+    var baseOptions = Object(ol_obj["a" /* assign */])({}, options);
+
+    delete baseOptions.style;
+    delete baseOptions.renderBuffer;
+    delete baseOptions.updateWhileAnimating;
+    delete baseOptions.updateWhileInteracting;
+    Layer.call(this, baseOptions);
+
+    /**
+    * @private
+    * @type {boolean}
+    */
+    this.declutter_ = options.declutter !== undefined ? options.declutter : false;
+
+    /**
+    * @type {number}
+    * @private
+    */
+    this.renderBuffer_ = options.renderBuffer !== undefined ?
+      options.renderBuffer : 100;
+
+    /**
+    * User provided style.
+    * @type {import("../style/Style.js").StyleLike}
+    * @private
+    */
+    this.style_ = null;
+
+    /**
+    * Style function for use within the library.
+    * @type {import("../style/Style.js").StyleFunction|undefined}
+    * @private
+    */
+    this.styleFunction_ = undefined;
+
+    this.setStyle(options.style);
+
+    /**
+    * @type {boolean}
+    * @private
+    */
+    this.updateWhileAnimating_ = options.updateWhileAnimating !== undefined ?
+      options.updateWhileAnimating : false;
+
+    /**
+    * @type {boolean}
+    * @private
+    */
+    this.updateWhileInteracting_ = options.updateWhileInteracting !== undefined ?
+      options.updateWhileInteracting : false;
+
+    /**
+    * @private
+    * @type {import("./VectorTileRenderType.js").default|string}
+    */
+    this.renderMode_ = options.renderMode || VectorRenderType.VECTOR;
+
+    /**
+    * The layer type.
+    * @protected
+    * @type {import("../LayerType.js").default}
+    */
+    this.type = LayerType.VECTOR;
+
+  }
+
+  if ( Layer ) VectorLayer.__proto__ = Layer;
+  VectorLayer.prototype = Object.create( Layer && Layer.prototype );
+  VectorLayer.prototype.constructor = VectorLayer;
+
+  /**
+  * @return {boolean} Declutter.
+  */
+  VectorLayer.prototype.getDeclutter = function getDeclutter () {
+    return this.declutter_;
+  };
+
+  /**
+  * @param {boolean} declutter Declutter.
+  */
+  VectorLayer.prototype.setDeclutter = function setDeclutter (declutter) {
+    this.declutter_ = declutter;
+  };
+
+  /**
+  * @return {number|undefined} Render buffer.
+  */
+  VectorLayer.prototype.getRenderBuffer = function getRenderBuffer () {
+    return this.renderBuffer_;
+  };
+
+  /**
+  * @return {function(import("../Feature.js").default, import("../Feature.js").default): number|null|undefined} Render
+  *     order.
+  */
+  VectorLayer.prototype.getRenderOrder = function getRenderOrder () {
+    return (
+    /** @type {import("../render.js").OrderFunction|null|undefined} */ (this.get(Vector_Property.RENDER_ORDER))
+    );
+  };
+
+  /**
+  * Get the style for features.  This returns whatever was passed to the `style`
+  * option at construction or to the `setStyle` method.
+  * @return {import("../style/Style.js").StyleLike}
+  *     Layer style.
+  * @api
+  */
+  VectorLayer.prototype.getStyle = function getStyle () {
+    return this.style_;
+  };
+
+  /**
+  * Get the style function.
+  * @return {import("../style/Style.js").StyleFunction|undefined} Layer style function.
+  * @api
+  */
+  VectorLayer.prototype.getStyleFunction = function getStyleFunction () {
+    return this.styleFunction_;
+  };
+
+  /**
+  * @return {boolean} Whether the rendered layer should be updated while
+  *     animating.
+  */
+  VectorLayer.prototype.getUpdateWhileAnimating = function getUpdateWhileAnimating () {
+    return this.updateWhileAnimating_;
+  };
+
+  /**
+  * @return {boolean} Whether the rendered layer should be updated while
+  *     interacting.
+  */
+  VectorLayer.prototype.getUpdateWhileInteracting = function getUpdateWhileInteracting () {
+    return this.updateWhileInteracting_;
+  };
+
+  /**
+  * @param {import("../render.js").OrderFunction|null|undefined} renderOrder
+  *     Render order.
+  */
+  VectorLayer.prototype.setRenderOrder = function setRenderOrder (renderOrder) {
+    this.set(Vector_Property.RENDER_ORDER, renderOrder);
+  };
+
+  /**
+  * Set the style for features.  This can be a single style object, an array
+  * of styles, or a function that takes a feature and resolution and returns
+  * an array of styles. If it is `undefined` the default style is used. If
+  * it is `null` the layer has no style (a `null` style), so only features
+  * that have their own styles will be rendered in the layer. See
+  * {@link module:ol/style} for information on the default style.
+  * @param {import("../style/Style.js").default|Array<import("../style/Style.js").default>|import("../style/Style.js").StyleFunction|null|undefined} style Layer style.
+  * @api
+  */
+  VectorLayer.prototype.setStyle = function setStyle (style) {
+    this.style_ = style !== undefined ? style : createDefaultStyle;
+    this.styleFunction_ = style === null ?
+      undefined : toFunction(this.style_);
+    this.changed();
+  };
+
+  /**
+  * @return {import("./VectorRenderType.js").default|string} The render mode.
+  */
+  VectorLayer.prototype.getRenderMode = function getRenderMode () {
+    return this.renderMode_;
+  };
+
+  return VectorLayer;
+}(layer_Layer));
+
+
+/**
+ * Return the associated {@link module:ol/source/Vector vectorsource} of the layer.
+ * @function
+ * @return {import("../source/Vector.js").default} Source.
+ * @api
+ */
+Vector_VectorLayer.prototype.getSource;
+
+
+/* harmony default export */ var layer_Vector = (Vector_VectorLayer);
+
+//# sourceMappingURL=Vector.js.map
+// CONCATENATED MODULE: ./node_modules/ol/interaction/Draw.js
+/**
+ * @module ol/interaction/Draw
+ */
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+/**
+ * @typedef {Object} Options
+ * @property {GeometryType} type Geometry type of
+ * the geometries being drawn with this instance.
+ * @property {number} [clickTolerance=6] The maximum distance in pixels between
+ * "down" and "up" for a "up" event to be considered a "click" event and
+ * actually add a point/vertex to the geometry being drawn.  The default of `6`
+ * was chosen for the draw interaction to behave correctly on mouse as well as
+ * on touch devices.
+ * @property {import("../Collection.js").default<Feature>} [features]
+ * Destination collection for the drawn features.
+ * @property {VectorSource} [source] Destination source for
+ * the drawn features.
+ * @property {number} [dragVertexDelay=500] Delay in milliseconds after pointerdown
+ * before the current vertex can be dragged to its exact position.
+ * @property {number} [snapTolerance=12] Pixel distance for snapping to the
+ * drawing finish.
+ * @property {boolean} [stopClick=false] Stop click, singleclick, and
+ * doubleclick events from firing during drawing.
+ * @property {number} [maxPoints] The number of points that can be drawn before
+ * a polygon ring or line string is finished. By default there is no
+ * restriction.
+ * @property {number} [minPoints] The number of points that must be drawn
+ * before a polygon ring or line string can be finished. Default is `3` for
+ * polygon rings and `2` for line strings.
+ * @property {import("../events/condition.js").Condition} [finishCondition] A function
+ * that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a
+ * boolean to indicate whether the drawing can be finished.
+ * @property {import("../style/Style.js").StyleLike} [style]
+ * Style for sketch features.
+ * @property {GeometryFunction} [geometryFunction]
+ * Function that is called when a geometry's coordinates are updated.
+ * @property {string} [geometryName] Geometry name to use for features created
+ * by the draw interaction.
+ * @property {import("../events/condition.js").Condition} [condition] A function that
+ * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a
+ * boolean to indicate whether that event should be handled.
+ * By default {@link module:ol/events/condition~noModifierKeys}, i.e. a click,
+ * adds a vertex or deactivates freehand drawing.
+ * @property {boolean} [freehand=false] Operate in freehand mode for lines,
+ * polygons, and circles.  This makes the interaction always operate in freehand
+ * mode and takes precedence over any `freehandCondition` option.
+ * @property {import("../events/condition.js").Condition} [freehandCondition]
+ * Condition that activates freehand drawing for lines and polygons. This
+ * function takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and
+ * returns a boolean to indicate whether that event should be handled. The
+ * default is {@link module:ol/events/condition~shiftKeyOnly}, meaning that the
+ * Shift key activates freehand drawing.
+ * @property {boolean} [wrapX=false] Wrap the world horizontally on the sketch
+ * overlay.
+ */
+
+
+/**
+ * Coordinate type when drawing points.
+ * @typedef {import("../coordinate.js").Coordinate} PointCoordType
+ */
+
+
+/**
+ * Coordinate type when drawing lines.
+ * @typedef {Array<import("../coordinate.js").Coordinate>} LineCoordType
+ */
+
+
+/**
+ * Coordinate type when drawing polygons.
+ * @typedef {Array<Array<import("../coordinate.js").Coordinate>>} PolyCoordType
+ */
+
+
+/**
+ * Types used for drawing coordinates.
+ * @typedef {PointCoordType|LineCoordType|PolyCoordType} SketchCoordType
+ */
+
+
+/**
+ * Function that takes an array of coordinates and an optional existing geometry as
+ * arguments, and returns a geometry. The optional existing geometry is the
+ * geometry that is returned when the function is called without a second
+ * argument.
+ * @typedef {function(!SketchCoordType, import("../geom/SimpleGeometry.js").default=):
+ *     import("../geom/SimpleGeometry.js").default} GeometryFunction
+ */
+
+
+/**
+ * Draw mode.  This collapses multi-part geometry types with their single-part
+ * cousins.
+ * @enum {string}
+ */
+var Draw_Mode = {
+  POINT: 'Point',
+  LINE_STRING: 'LineString',
+  POLYGON: 'Polygon',
+  CIRCLE: 'Circle'
+};
+
+
+/**
+ * @enum {string}
+ */
+var DrawEventType = {
+  /**
+   * Triggered upon feature draw start
+   * @event DrawEvent#drawstart
+   * @api
+   */
+  DRAWSTART: 'drawstart',
+  /**
+   * Triggered upon feature draw end
+   * @event DrawEvent#drawend
+   * @api
+   */
+  DRAWEND: 'drawend'
+};
+
+
+/**
+ * @classdesc
+ * Events emitted by {@link module:ol/interaction/Draw~Draw} instances are
+ * instances of this type.
+ */
+var DrawEvent = /*@__PURE__*/(function (Event) {
+  function DrawEvent(type, feature) {
+
+    Event.call(this, type);
+
+    /**
+     * The feature being drawn.
+     * @type {Feature}
+     * @api
+     */
+    this.feature = feature;
+
+  }
+
+  if ( Event ) DrawEvent.__proto__ = Event;
+  DrawEvent.prototype = Object.create( Event && Event.prototype );
+  DrawEvent.prototype.constructor = DrawEvent;
+
+  return DrawEvent;
+}(Event["a" /* default */]));
+
+
+/**
+ * @classdesc
+ * Interaction for drawing feature geometries.
+ *
+ * @fires DrawEvent
+ * @api
+ */
+var Draw_Draw = /*@__PURE__*/(function (PointerInteraction) {
+  function Draw(options) {
+
+    var pointerOptions = /** @type {import("./Pointer.js").Options} */ (options);
+    if (!pointerOptions.stopDown) {
+      pointerOptions.stopDown = functions["a" /* FALSE */];
+    }
+
+    PointerInteraction.call(this, pointerOptions);
+
+    /**
+     * @type {boolean}
+     * @private
+     */
+    this.shouldHandle_ = false;
+
+    /**
+     * @type {import("../pixel.js").Pixel}
+     * @private
+     */
+    this.downPx_ = null;
+
+    /**
+     * @type {?}
+     * @private
+     */
+    this.downTimeout_;
+
+    /**
+     * @type {number|undefined}
+     * @private
+     */
+    this.lastDragTime_;
+
+    /**
+     * @type {boolean}
+     * @private
+     */
+    this.freehand_ = false;
+
+    /**
+     * Target source for drawn features.
+     * @type {VectorSource}
+     * @private
+     */
+    this.source_ = options.source ? options.source : null;
+
+    /**
+     * Target collection for drawn features.
+     * @type {import("../Collection.js").default<Feature>}
+     * @private
+     */
+    this.features_ = options.features ? options.features : null;
+
+    /**
+     * Pixel distance for snapping.
+     * @type {number}
+     * @private
+     */
+    this.snapTolerance_ = options.snapTolerance ? options.snapTolerance : 12;
+
+    /**
+     * Geometry type.
+     * @type {GeometryType}
+     * @private
+     */
+    this.type_ = /** @type {GeometryType} */ (options.type);
+
+    /**
+     * Drawing mode (derived from geometry type.
+     * @type {Mode}
+     * @private
+     */
+    this.mode_ = getMode(this.type_);
+
+    /**
+     * Stop click, singleclick, and doubleclick events from firing during drawing.
+     * Default is `false`.
+     * @type {boolean}
+     * @private
+     */
+    this.stopClick_ = !!options.stopClick;
+
+    /**
+     * The number of points that must be drawn before a polygon ring or line
+     * string can be finished.  The default is 3 for polygon rings and 2 for
+     * line strings.
+     * @type {number}
+     * @private
+     */
+    this.minPoints_ = options.minPoints ?
+      options.minPoints :
+      (this.mode_ === Draw_Mode.POLYGON ? 3 : 2);
+
+    /**
+     * The number of points that can be drawn before a polygon ring or line string
+     * is finished. The default is no restriction.
+     * @type {number}
+     * @private
+     */
+    this.maxPoints_ = options.maxPoints ? options.maxPoints : Infinity;
+
+    /**
+     * A function to decide if a potential finish coordinate is permissible
+     * @private
+     * @type {import("../events/condition.js").Condition}
+     */
+    this.finishCondition_ = options.finishCondition ? options.finishCondition : functions["b" /* TRUE */];
+
+    var geometryFunction = options.geometryFunction;
+    if (!geometryFunction) {
+      if (this.type_ === GeometryType.CIRCLE) {
+        /**
+         * @param {!LineCoordType} coordinates The coordinates.
+         * @param {import("../geom/SimpleGeometry.js").default=} opt_geometry Optional geometry.
+         * @return {import("../geom/SimpleGeometry.js").default} A geometry.
+         */
+        geometryFunction = function(coordinates, opt_geometry) {
+          var circle = opt_geometry ? /** @type {Circle} */ (opt_geometry) :
+            new geom_Circle([NaN, NaN]);
+          var squaredLength = coordinate_squaredDistance(
+            coordinates[0], coordinates[1]);
+          circle.setCenterAndRadius(coordinates[0], Math.sqrt(squaredLength));
+          return circle;
+        };
+      } else {
+        var Constructor;
+        var mode = this.mode_;
+        if (mode === Draw_Mode.POINT) {
+          Constructor = geom_Point;
+        } else if (mode === Draw_Mode.LINE_STRING) {
+          Constructor = geom_LineString;
+        } else if (mode === Draw_Mode.POLYGON) {
+          Constructor = geom_Polygon;
+        }
+        /**
+         * @param {!LineCoordType} coordinates The coordinates.
+         * @param {import("../geom/SimpleGeometry.js").default=} opt_geometry Optional geometry.
+         * @return {import("../geom/SimpleGeometry.js").default} A geometry.
+         */
+        geometryFunction = function(coordinates, opt_geometry) {
+          var geometry = opt_geometry;
+          if (geometry) {
+            if (mode === Draw_Mode.POLYGON) {
+              if (coordinates[0].length) {
+                // Add a closing coordinate to match the first
+                geometry.setCoordinates([coordinates[0].concat([coordinates[0][0]])]);
+              } else {
+                geometry.setCoordinates([]);
+              }
+            } else {
+              geometry.setCoordinates(coordinates);
+            }
+          } else {
+            geometry = new Constructor(coordinates);
+          }
+          return geometry;
+        };
+      }
+    }
+
+    /**
+     * @type {GeometryFunction}
+     * @private
+     */
+    this.geometryFunction_ = geometryFunction;
+
+    /**
+     * @type {number}
+     * @private
+     */
+    this.dragVertexDelay_ = options.dragVertexDelay !== undefined ? options.dragVertexDelay : 500;
+
+    /**
+     * Finish coordinate for the feature (first point for polygons, last point for
+     * linestrings).
+     * @type {import("../coordinate.js").Coordinate}
+     * @private
+     */
+    this.finishCoordinate_ = null;
+
+    /**
+     * Sketch feature.
+     * @type {Feature}
+     * @private
+     */
+    this.sketchFeature_ = null;
+
+    /**
+     * Sketch point.
+     * @type {Feature}
+     * @private
+     */
+    this.sketchPoint_ = null;
+
+    /**
+     * Sketch coordinates. Used when drawing a line or polygon.
+     * @type {SketchCoordType}
+     * @private
+     */
+    this.sketchCoords_ = null;
+
+    /**
+     * Sketch line. Used when drawing polygon.
+     * @type {Feature}
+     * @private
+     */
+    this.sketchLine_ = null;
+
+    /**
+     * Sketch line coordinates. Used when drawing a polygon or circle.
+     * @type {LineCoordType}
+     * @private
+     */
+    this.sketchLineCoords_ = null;
+
+    /**
+     * Squared tolerance for handling up events.  If the squared distance
+     * between a down and up event is greater than this tolerance, up events
+     * will not be handled.
+     * @type {number}
+     * @private
+     */
+    this.squaredClickTolerance_ = options.clickTolerance ?
+      options.clickTolerance * options.clickTolerance : 36;
+
+    /**
+     * Draw overlay where our sketch features are drawn.
+     * @type {VectorLayer}
+     * @private
+     */
+    this.overlay_ = new layer_Vector({
+      source: new Vector({
+        useSpatialIndex: false,
+        wrapX: options.wrapX ? options.wrapX : false
+      }),
+      style: options.style ? options.style :
+        getDefaultStyleFunction(),
+      updateWhileInteracting: true
+    });
+
+    /**
+     * Name of the geometry attribute for newly created features.
+     * @type {string|undefined}
+     * @private
+     */
+    this.geometryName_ = options.geometryName;
+
+    /**
+     * @private
+     * @type {import("../events/condition.js").Condition}
+     */
+    this.condition_ = options.condition ? options.condition : noModifierKeys;
+
+    /**
+     * @private
+     * @type {import("../events/condition.js").Condition}
+     */
+    this.freehandCondition_;
+    if (options.freehand) {
+      this.freehandCondition_ = always;
+    } else {
+      this.freehandCondition_ = options.freehandCondition ?
+        options.freehandCondition : shiftKeyOnly;
+    }
+
+    Object(ol_events["a" /* listen */])(this,
+      Object(ol_Object["b" /* getChangeEventType */])(interaction_Property.ACTIVE),
+      this.updateState_, this);
+
+  }
+
+  if ( PointerInteraction ) Draw.__proto__ = PointerInteraction;
+  Draw.prototype = Object.create( PointerInteraction && PointerInteraction.prototype );
+  Draw.prototype.constructor = Draw;
+
+  /**
+   * @inheritDoc
+   */
+  Draw.prototype.setMap = function setMap (map) {
+    PointerInteraction.prototype.setMap.call(this, map);
+    this.updateState_();
+  };
+
+  /**
+   * Get the overlay layer that this interaction renders sketch features to.
+   * @return {VectorLayer} Overlay layer.
+   * @api
+   */
+  Draw.prototype.getOverlay = function getOverlay () {
+    return this.overlay_;
+  };
+
+  /**
+   * Handles the {@link module:ol/MapBrowserEvent map browser event} and may actually draw or finish the drawing.
+   * @override
+   * @api
+   */
+  Draw.prototype.handleEvent = function handleEvent (event) {
+    if (event.originalEvent.type === EventType["a" /* default */].CONTEXTMENU) {
+      // Avoid context menu for long taps when drawing on mobile
+      event.preventDefault();
+    }
+    this.freehand_ = this.mode_ !== Draw_Mode.POINT && this.freehandCondition_(event);
+    var move = event.type === MapBrowserEventType.POINTERMOVE;
+    var pass = true;
+    if (!this.freehand_ && this.lastDragTime_ && event.type === MapBrowserEventType.POINTERDRAG) {
+      var now = Date.now();
+      if (now - this.lastDragTime_ >= this.dragVertexDelay_) {
+        this.downPx_ = event.pixel;
+        this.shouldHandle_ = !this.freehand_;
+        move = true;
+      } else {
+        this.lastDragTime_ = undefined;
+      }
+      if (this.shouldHandle_ && this.downTimeout_ !== undefined) {
+        clearTimeout(this.downTimeout_);
+        this.downTimeout_ = undefined;
+      }
+    }
+    if (this.freehand_ &&
+        event.type === MapBrowserEventType.POINTERDRAG &&
+        this.sketchFeature_ !== null) {
+      this.addToDrawing_(event);
+      pass = false;
+    } else if (this.freehand_ &&
+        event.type === MapBrowserEventType.POINTERDOWN) {
+      pass = false;
+    } else if (move) {
+      pass = event.type === MapBrowserEventType.POINTERMOVE;
+      if (pass && this.freehand_) {
+        pass = this.handlePointerMove_(event);
+      } else if (/** @type {MapBrowserPointerEvent} */ (event).pointerEvent.pointerType == POINTER_TYPE ||
+          (event.type === MapBrowserEventType.POINTERDRAG && this.downTimeout_ === undefined)) {
+        this.handlePointerMove_(event);
+      }
+    } else if (event.type === MapBrowserEventType.DBLCLICK) {
+      pass = false;
+    }
+
+    return PointerInteraction.prototype.handleEvent.call(this, event) && pass;
+  };
+
+  /**
+   * @inheritDoc
+   */
+  Draw.prototype.handleDownEvent = function handleDownEvent (event) {
+    this.shouldHandle_ = !this.freehand_;
+
+    if (this.freehand_) {
+      this.downPx_ = event.pixel;
+      if (!this.finishCoordinate_) {
+        this.startDrawing_(event);
+      }
+      return true;
+    } else if (this.condition_(event)) {
+      this.lastDragTime_ = Date.now();
+      this.downTimeout_ = setTimeout(function() {
+        this.handlePointerMove_(new ol_MapBrowserPointerEvent(
+          MapBrowserEventType.POINTERMOVE, event.map, event.pointerEvent, false, event.frameState));
+      }.bind(this), this.dragVertexDelay_);
+      this.downPx_ = event.pixel;
+      return true;
+    } else {
+      return false;
+    }
+  };
+
+
+  /**
+   * @inheritDoc
+   */
+  Draw.prototype.handleUpEvent = function handleUpEvent (event) {
+    var pass = true;
+
+    if (this.downTimeout_) {
+      clearTimeout(this.downTimeout_);
+      this.downTimeout_ = undefined;
+    }
+
+    this.handlePointerMove_(event);
+
+    var circleMode = this.mode_ === Draw_Mode.CIRCLE;
+
+    if (this.shouldHandle_) {
+      if (!this.finishCoordinate_) {
+        this.startDrawing_(event);
+        if (this.mode_ === Draw_Mode.POINT) {
+          this.finishDrawing();
+        }
+      } else if (this.freehand_ || circleMode) {
+        this.finishDrawing();
+      } else if (this.atFinish_(event)) {
+        if (this.finishCondition_(event)) {
+          this.finishDrawing();
+        }
+      } else {
+        this.addToDrawing_(event);
+      }
+      pass = false;
+    } else if (this.freehand_) {
+      this.finishCoordinate_ = null;
+      this.abortDrawing_();
+    }
+    if (!pass && this.stopClick_) {
+      event.stopPropagation();
+    }
+    return pass;
+  };
+
+  /**
+   * Handle move events.
+   * @param {import("../MapBrowserEvent.js").default} event A move event.
+   * @return {boolean} Pass the event to other interactions.
+   * @private
+   */
+  Draw.prototype.handlePointerMove_ = function handlePointerMove_ (event) {
+    if (this.downPx_ &&
+        ((!this.freehand_ && this.shouldHandle_) ||
+        (this.freehand_ && !this.shouldHandle_))) {
+      var downPx = this.downPx_;
+      var clickPx = event.pixel;
+      var dx = downPx[0] - clickPx[0];
+      var dy = downPx[1] - clickPx[1];
+      var squaredDistance = dx * dx + dy * dy;
+      this.shouldHandle_ = this.freehand_ ?
+        squaredDistance > this.squaredClickTolerance_ :
+        squaredDistance <= this.squaredClickTolerance_;
+      if (!this.shouldHandle_) {
+        return true;
+      }
+    }
+
+    if (this.finishCoordinate_) {
+      this.modifyDrawing_(event);
+    } else {
+      this.createOrUpdateSketchPoint_(event);
+    }
+    return true;
+  };
+
+  /**
+   * Determine if an event is within the snapping tolerance of the start coord.
+   * @param {import("../MapBrowserEvent.js").default} event Event.
+   * @return {boolean} The event is within the snapping tolerance of the start.
+   * @private
+   */
+  Draw.prototype.atFinish_ = function atFinish_ (event) {
+    var at = false;
+    if (this.sketchFeature_) {
+      var potentiallyDone = false;
+      var potentiallyFinishCoordinates = [this.finishCoordinate_];
+      if (this.mode_ === Draw_Mode.LINE_STRING) {
+        potentiallyDone = this.sketchCoords_.length > this.minPoints_;
+      } else if (this.mode_ === Draw_Mode.POLYGON) {
+        var sketchCoords = /** @type {PolyCoordType} */ (this.sketchCoords_);
+        potentiallyDone = sketchCoords[0].length > this.minPoints_;
+        potentiallyFinishCoordinates = [sketchCoords[0][0], sketchCoords[0][sketchCoords[0].length - 2]];
+      }
+      if (potentiallyDone) {
+        var map = event.map;
+        for (var i = 0, ii = potentiallyFinishCoordinates.length; i < ii; i++) {
+          var finishCoordinate = potentiallyFinishCoordinates[i];
+          var finishPixel = map.getPixelFromCoordinate(finishCoordinate);
+          var pixel = event.pixel;
+          var dx = pixel[0] - finishPixel[0];
+          var dy = pixel[1] - finishPixel[1];
+          var snapTolerance = this.freehand_ ? 1 : this.snapTolerance_;
+          at = Math.sqrt(dx * dx + dy * dy) <= snapTolerance;
+          if (at) {
+            this.finishCoordinate_ = finishCoordinate;
+            break;
+          }
+        }
+      }
+    }
+    return at;
+  };
+
+  /**
+   * @param {import("../MapBrowserEvent.js").default} event Event.
+   * @private
+   */
+  Draw.prototype.createOrUpdateSketchPoint_ = function createOrUpdateSketchPoint_ (event) {
+    var coordinates = event.coordinate.slice();
+    if (!this.sketchPoint_) {
+      this.sketchPoint_ = new ol_Feature(new geom_Point(coordinates));
+      this.updateSketchFeatures_();
+    } else {
+      var sketchPointGeom = /** @type {Point} */ (this.sketchPoint_.getGeometry());
+      sketchPointGeom.setCoordinates(coordinates);
+    }
+  };
+
+  /**
+   * Start the drawing.
+   * @param {import("../MapBrowserEvent.js").default} event Event.
+   * @private
+   */
+  Draw.prototype.startDrawing_ = function startDrawing_ (event) {
+    var start = event.coordinate;
+    this.finishCoordinate_ = start;
+    if (this.mode_ === Draw_Mode.POINT) {
+      this.sketchCoords_ = start.slice();
+    } else if (this.mode_ === Draw_Mode.POLYGON) {
+      this.sketchCoords_ = [[start.slice(), start.slice()]];
+      this.sketchLineCoords_ = this.sketchCoords_[0];
+    } else {
+      this.sketchCoords_ = [start.slice(), start.slice()];
+    }
+    if (this.sketchLineCoords_) {
+      this.sketchLine_ = new ol_Feature(
+        new geom_LineString(this.sketchLineCoords_));
+    }
+    var geometry = this.geometryFunction_(this.sketchCoords_);
+    this.sketchFeature_ = new ol_Feature();
+    if (this.geometryName_) {
+      this.sketchFeature_.setGeometryName(this.geometryName_);
+    }
+    this.sketchFeature_.setGeometry(geometry);
+    this.updateSketchFeatures_();
+    this.dispatchEvent(new DrawEvent(DrawEventType.DRAWSTART, this.sketchFeature_));
+  };
+
+  /**
+   * Modify the drawing.
+   * @param {import("../MapBrowserEvent.js").default} event Event.
+   * @private
+   */
+  Draw.prototype.modifyDrawing_ = function modifyDrawing_ (event) {
+    var coordinate = event.coordinate;
+    var geometry = /** @type {import("../geom/SimpleGeometry.js").default} */ (this.sketchFeature_.getGeometry());
+    var coordinates, last;
+    if (this.mode_ === Draw_Mode.POINT) {
+      last = this.sketchCoords_;
+    } else if (this.mode_ === Draw_Mode.POLYGON) {
+      coordinates = /** @type {PolyCoordType} */ (this.sketchCoords_)[0];
+      last = coordinates[coordinates.length - 1];
+      if (this.atFinish_(event)) {
+        // snap to finish
+        coordinate = this.finishCoordinate_.slice();
+      }
+    } else {
+      coordinates = this.sketchCoords_;
+      last = coordinates[coordinates.length - 1];
+    }
+    last[0] = coordinate[0];
+    last[1] = coordinate[1];
+    this.geometryFunction_(/** @type {!LineCoordType} */ (this.sketchCoords_), geometry);
+    if (this.sketchPoint_) {
+      var sketchPointGeom = /** @type {Point} */ (this.sketchPoint_.getGeometry());
+      sketchPointGeom.setCoordinates(coordinate);
+    }
+    /** @type {LineString} */
+    var sketchLineGeom;
+    if (geometry.getType() == GeometryType.POLYGON &&
+        this.mode_ !== Draw_Mode.POLYGON) {
+      if (!this.sketchLine_) {
+        this.sketchLine_ = new ol_Feature();
+      }
+      var ring = /** @type {Polygon} */ (geometry).getLinearRing(0);
+      sketchLineGeom = /** @type {LineString} */ (this.sketchLine_.getGeometry());
+      if (!sketchLineGeom) {
+        sketchLineGeom = new geom_LineString(ring.getFlatCoordinates(), ring.getLayout());
+        this.sketchLine_.setGeometry(sketchLineGeom);
+      } else {
+        sketchLineGeom.setFlatCoordinates(
+          ring.getLayout(), ring.getFlatCoordinates());
+        sketchLineGeom.changed();
+      }
+    } else if (this.sketchLineCoords_) {
+      sketchLineGeom = /** @type {LineString} */ (this.sketchLine_.getGeometry());
+      sketchLineGeom.setCoordinates(this.sketchLineCoords_);
+    }
+    this.updateSketchFeatures_();
+  };
+
+  /**
+   * Add a new coordinate to the drawing.
+   * @param {import("../MapBrowserEvent.js").default} event Event.
+   * @private
+   */
+  Draw.prototype.addToDrawing_ = function addToDrawing_ (event) {
+    var coordinate = event.coordinate;
+    var geometry = /** @type {import("../geom/SimpleGeometry.js").default} */ (this.sketchFeature_.getGeometry());
+    var done;
+    var coordinates;
+    if (this.mode_ === Draw_Mode.LINE_STRING) {
+      this.finishCoordinate_ = coordinate.slice();
+      coordinates = /** @type {LineCoordType} */ (this.sketchCoords_);
+      if (coordinates.length >= this.maxPoints_) {
+        if (this.freehand_) {
+          coordinates.pop();
+        } else {
+          done = true;
+        }
+      }
+      coordinates.push(coordinate.slice());
+      this.geometryFunction_(coordinates, geometry);
+    } else if (this.mode_ === Draw_Mode.POLYGON) {
+      coordinates = /** @type {PolyCoordType} */ (this.sketchCoords_)[0];
+      if (coordinates.length >= this.maxPoints_) {
+        if (this.freehand_) {
+          coordinates.pop();
+        } else {
+          done = true;
+        }
+      }
+      coordinates.push(coordinate.slice());
+      if (done) {
+        this.finishCoordinate_ = coordinates[0];
+      }
+      this.geometryFunction_(this.sketchCoords_, geometry);
+    }
+    this.updateSketchFeatures_();
+    if (done) {
+      this.finishDrawing();
+    }
+  };
+
+  /**
+   * Remove last point of the feature currently being drawn.
+   * @api
+   */
+  Draw.prototype.removeLastPoint = function removeLastPoint () {
+    if (!this.sketchFeature_) {
+      return;
+    }
+    var geometry = /** @type {import("../geom/SimpleGeometry.js").default} */ (this.sketchFeature_.getGeometry());
+    var coordinates;
+    /** @type {LineString} */
+    var sketchLineGeom;
+    if (this.mode_ === Draw_Mode.LINE_STRING) {
+      coordinates = /** @type {LineCoordType} */ (this.sketchCoords_);
+      coordinates.splice(-2, 1);
+      this.geometryFunction_(coordinates, geometry);
+      if (coordinates.length >= 2) {
+        this.finishCoordinate_ = coordinates[coordinates.length - 2].slice();
+      }
+    } else if (this.mode_ === Draw_Mode.POLYGON) {
+      coordinates = /** @type {PolyCoordType} */ (this.sketchCoords_)[0];
+      coordinates.splice(-2, 1);
+      sketchLineGeom = /** @type {LineString} */ (this.sketchLine_.getGeometry());
+      sketchLineGeom.setCoordinates(coordinates);
+      this.geometryFunction_(this.sketchCoords_, geometry);
+    }
+
+    if (coordinates.length === 0) {
+      this.finishCoordinate_ = null;
+    }
+
+    this.updateSketchFeatures_();
+  };
+
+  /**
+   * Stop drawing and add the sketch feature to the target layer.
+   * The {@link module:ol/interaction/Draw~DrawEventType.DRAWEND} event is
+   * dispatched before inserting the feature.
+   * @api
+   */
+  Draw.prototype.finishDrawing = function finishDrawing () {
+    var sketchFeature = this.abortDrawing_();
+    if (!sketchFeature) {
+      return;
+    }
+    var coordinates = this.sketchCoords_;
+    var geometry = /** @type {import("../geom/SimpleGeometry.js").default} */ (sketchFeature.getGeometry());
+    if (this.mode_ === Draw_Mode.LINE_STRING) {
+      // remove the redundant last point
+      coordinates.pop();
+      this.geometryFunction_(coordinates, geometry);
+    } else if (this.mode_ === Draw_Mode.POLYGON) {
+      // remove the redundant last point in ring
+      /** @type {PolyCoordType} */ (coordinates)[0].pop();
+      this.geometryFunction_(coordinates, geometry);
+      coordinates = geometry.getCoordinates();
+    }
+
+    // cast multi-part geometries
+    if (this.type_ === GeometryType.MULTI_POINT) {
+      sketchFeature.setGeometry(new geom_MultiPoint([/** @type {PointCoordType} */(coordinates)]));
+    } else if (this.type_ === GeometryType.MULTI_LINE_STRING) {
+      sketchFeature.setGeometry(new geom_MultiLineString([/** @type {LineCoordType} */(coordinates)]));
+    } else if (this.type_ === GeometryType.MULTI_POLYGON) {
+      sketchFeature.setGeometry(new geom_MultiPolygon([/** @type {PolyCoordType} */(coordinates)]));
+    }
+
+    // First dispatch event to allow full set up of feature
+    this.dispatchEvent(new DrawEvent(DrawEventType.DRAWEND, sketchFeature));
+
+    // Then insert feature
+    if (this.features_) {
+      this.features_.push(sketchFeature);
+    }
+    if (this.source_) {
+      this.source_.addFeature(sketchFeature);
+    }
+  };
+
+  /**
+   * Stop drawing without adding the sketch feature to the target layer.
+   * @return {Feature} The sketch feature (or null if none).
+   * @private
+   */
+  Draw.prototype.abortDrawing_ = function abortDrawing_ () {
+    this.finishCoordinate_ = null;
+    var sketchFeature = this.sketchFeature_;
+    if (sketchFeature) {
+      this.sketchFeature_ = null;
+      this.sketchPoint_ = null;
+      this.sketchLine_ = null;
+      /** @type {VectorSource} */ (this.overlay_.getSource()).clear(true);
+    }
+    return sketchFeature;
+  };
+
+  /**
+   * Extend an existing geometry by adding additional points. This only works
+   * on features with `LineString` geometries, where the interaction will
+   * extend lines by adding points to the end of the coordinates array.
+   * @param {!Feature} feature Feature to be extended.
+   * @api
+   */
+  Draw.prototype.extend = function extend (feature) {
+    var geometry = feature.getGeometry();
+    var lineString = /** @type {LineString} */ (geometry);
+    this.sketchFeature_ = feature;
+    this.sketchCoords_ = lineString.getCoordinates();
+    var last = this.sketchCoords_[this.sketchCoords_.length - 1];
+    this.finishCoordinate_ = last.slice();
+    this.sketchCoords_.push(last.slice());
+    this.updateSketchFeatures_();
+    this.dispatchEvent(new DrawEvent(DrawEventType.DRAWSTART, this.sketchFeature_));
+  };
+
+  /**
+   * Redraw the sketch features.
+   * @private
+   */
+  Draw.prototype.updateSketchFeatures_ = function updateSketchFeatures_ () {
+    var sketchFeatures = [];
+    if (this.sketchFeature_) {
+      sketchFeatures.push(this.sketchFeature_);
+    }
+    if (this.sketchLine_) {
+      sketchFeatures.push(this.sketchLine_);
+    }
+    if (this.sketchPoint_) {
+      sketchFeatures.push(this.sketchPoint_);
+    }
+    var overlaySource = /** @type {VectorSource} */ (this.overlay_.getSource());
+    overlaySource.clear(true);
+    overlaySource.addFeatures(sketchFeatures);
+  };
+
+  /**
+   * @private
+   */
+  Draw.prototype.updateState_ = function updateState_ () {
+    var map = this.getMap();
+    var active = this.getActive();
+    if (!map || !active) {
+      this.abortDrawing_();
+    }
+    this.overlay_.setMap(active ? map : null);
+  };
+
+  return Draw;
+}(Pointer));
+
+
+/**
+ * @return {import("../style/Style.js").StyleFunction} Styles.
+ */
+function getDefaultStyleFunction() {
+  var styles = createEditingStyle();
+  return function(feature, resolution) {
+    return styles[feature.getGeometry().getType()];
+  };
+}
+
+
+/**
+ * Create a `geometryFunction` for `type: 'Circle'` that will create a regular
+ * polygon with a user specified number of sides and start angle instead of an
+ * `import("../geom/Circle.js").Circle` geometry.
+ * @param {number=} opt_sides Number of sides of the regular polygon. Default is
+ *     32.
+ * @param {number=} opt_angle Angle of the first point in radians. 0 means East.
+ *     Default is the angle defined by the heading from the center of the
+ *     regular polygon to the current pointer position.
+ * @return {GeometryFunction} Function that draws a
+ *     polygon.
+ * @api
+ */
+function createRegularPolygon(opt_sides, opt_angle) {
+  return function(coordinates, opt_geometry) {
+    var center = /** @type {LineCoordType} */ (coordinates)[0];
+    var end = /** @type {LineCoordType} */ (coordinates)[1];
+    var radius = Math.sqrt(
+      coordinate_squaredDistance(center, end));
+    var geometry = opt_geometry ? /** @type {Polygon} */ (opt_geometry) :
+      fromCircle(new geom_Circle(center), opt_sides);
+    var angle = opt_angle;
+    if (!opt_angle) {
+      var x = end[0] - center[0];
+      var y = end[1] - center[1];
+      angle = Math.atan(y / x) - (x < 0 ? Math.PI : 0);
+    }
+    makeRegular(geometry, center, radius, angle);
+    return geometry;
+  };
+}
+
+
+/**
+ * Create a `geometryFunction` that will create a box-shaped polygon (aligned
+ * with the coordinate system axes).  Use this with the draw interaction and
+ * `type: 'Circle'` to return a box instead of a circle geometry.
+ * @return {GeometryFunction} Function that draws a box-shaped polygon.
+ * @api
+ */
+function createBox() {
+  return (
+    function(coordinates, opt_geometry) {
+      var extent = boundingExtent(/** @type {LineCoordType} */ (coordinates));
+      var boxCoordinates = [[
+        getBottomLeft(extent),
+        getBottomRight(extent),
+        getTopRight(extent),
+        getTopLeft(extent),
+        getBottomLeft(extent)
+      ]];
+      var geometry = opt_geometry;
+      if (geometry) {
+        geometry.setCoordinates(boxCoordinates);
+      } else {
+        geometry = new geom_Polygon(boxCoordinates);
+      }
+      return geometry;
+    }
+  );
+}
+
+
+/**
+ * Get the drawing mode.  The mode for mult-part geometries is the same as for
+ * their single-part cousins.
+ * @param {GeometryType} type Geometry type.
+ * @return {Mode} Drawing mode.
+ */
+function getMode(type) {
+  var mode;
+  if (type === GeometryType.POINT ||
+      type === GeometryType.MULTI_POINT) {
+    mode = Draw_Mode.POINT;
+  } else if (type === GeometryType.LINE_STRING ||
+      type === GeometryType.MULTI_LINE_STRING) {
+    mode = Draw_Mode.LINE_STRING;
+  } else if (type === GeometryType.POLYGON ||
+      type === GeometryType.MULTI_POLYGON) {
+    mode = Draw_Mode.POLYGON;
+  } else if (type === GeometryType.CIRCLE) {
+    mode = Draw_Mode.CIRCLE;
+  }
+  return (
+    /** @type {!Mode} */ (mode)
+  );
+}
+
+
+/* harmony default export */ var interaction_Draw = (Draw_Draw);
+
+//# sourceMappingURL=Draw.js.map
+// CONCATENATED MODULE: ./src/MessureControl.js
+/**
+ * @module ol/control/MessureControl
+ */
+
+
+
+
+
+
+
+
+
+
+
+
+
+/**
+ * @typedef {Object} Options
+ * @property {string} [className='ol-full-screen'] CSS class name.
+ * @property {string|Text} [label='\u2922'] Text label to use for the button.
+ * Instead of text, also an element (e.g. a `span` element) can be used.
+ * @property {string|Text} [labelActive='\u00d7'] Text label to use for the
+ * button when full-screen is active.
+ * Instead of text, also an element (e.g. a `span` element) can be used.
+ * @property {string} [tipLabel='Toggle full-screen'] Text label to use for the button tip.
+ * @property {boolean} [keys=false] Full keyboard access.
+ * @property {HTMLElement|string} [target] Specify a target if you want the
+ * control to be rendered outside of the map's viewport.
+ * @property {HTMLElement|string} [source] The element to be displayed
+ * fullscreen. When not provided, the element containing the map viewport will
+ * be displayed fullscreen.
+ */
+
+
+/**
+ * @classdesc
+ * Provides a button that when clicked fills up the full screen with the map.
+ * The full screen source element is by default the element containing the map viewport unless
+ * overridden by providing the `source` option. In which case, the dom
+ * element introduced using this parameter will be displayed in full screen.
+ *
+ * When in full screen mode, a close button is shown to exit full screen mode.
+ * The [Fullscreen API](http://www.w3.org/TR/fullscreen/) is used to
+ * toggle the map in full screen mode.
+ *
+ * @api
+ */
+var MessureControl_MessureControl = /*@__PURE__*/(function (Control) {
+	function MessureControl(opt_options) {
+
+		var self = this;
+		var options = opt_options ? opt_options : {};
+
+		Control.call(this, {
+			element: document.createElement('div'),
+			target: options.target
+		});
+
+		this.active_ = options.active ? options.active : false;
+
+		/**
+		 * @private
+		 * @type {string}
+		 */
+		this.cssClassName_ = options.className !== undefined ? options.className :
+			'ol-messure';
+
+		var label = options.label !== undefined ? options.label : '\ud83d\udccf';
+
+		/**
+		 * @private
+		 * @type {Text}
+		 */
+		this.labelNode_ = typeof label === 'string' ?
+			document.createTextNode(label) : label;
+
+		var labelActive = options.labelActive !== undefined ? options.labelActive : '\ud83d\udccf';
+
+		/**
+		 * @private
+		 * @type {Text}
+		 */
+		this.labelActiveNode_ = typeof labelActive === 'string' ?
+			document.createTextNode(labelActive) : labelActive;
+
+		/**
+		 * @private
+		 * @type {HTMLElement}
+		 */
+		this.button_ = document.createElement('button');
+
+		var tipLabel = options.tipLabel ? options.tipLabel : 'messure distance';
+		this.setClassName_(this.button_, this.active_);
+		this.button_.setAttribute('type', 'button');
+		this.button_.title = tipLabel;
+		this.button_.appendChild(this.labelNode_);
+
+		Object(ol_events["a" /* listen */])(this.button_, EventType["a" /* default */].CLICK,
+			this.handleClick_, this);
+
+		var cssClasses = this.cssClassName_ + ' ' + CLASS_UNSELECTABLE +
+				' ' + CLASS_CONTROL;
+		var element = this.element;
+		element.className = cssClasses;
+		element.appendChild(this.button_);
+
+		/**
+		 * @private
+		 * @type {boolean}
+		 * /
+		this.keys_ = options.keys !== undefined ? options.keys : false;*/
+
+		/**
+		 * @private
+		 * @type {HTMLElement|string|undefined}
+		 */
+		this.source_ = options.source ? options.source : new Vector();
+
+
+		/**
+		 * Currently drawn feature.
+		 * @type {module:ol/Feature~Feature}
+		 */
+		this.sketch;
+
+
+		/**
+		 * The help tooltip element.
+		 * @type {Element}
+		 */
+		this.helpTooltipElement;
+
+
+		/**
+		 * Overlay to show the help messages.
+		 * @type {module:ol/Overlay}
+		 */
+		this.helpTooltip;
+
+
+		/**
+		 * The measure tooltip element.
+		 * @type {Element}
+		 */
+		this.measureTooltipElement;
+
+
+		/**
+		 * Overlay to show the measurement.
+		 * @type {module:ol/Overlay}
+		 */
+		this.measureTooltip;
+
+
+		/**
+		 * Message to show when the user is drawing a polygon.
+		 * @type {string}
+		 */
+		this.continuePolygonMsg = 'Click to continue drawing the polygon';
+
+
+		/**
+		 * Message to show when the user is drawing a line.
+		 * @type {string}
+		 */
+		this.continueLineMsg = 'Click to continue drawing the line';
+
+		var type = (false ? undefined : 'LineString');
+		this.draw_ = new interaction_Draw({
+			source: this.source_,
+			type: type,
+			style: new style_Style({
+				fill: new style_Fill({
+					color: 'rgba(255, 255, 255, 0.2)'
+				}),
+				stroke: new style_Stroke({
+					color: 'rgba(0, 0, 0, 0.5)',
+					lineDash: [10, 10],
+					width: 2
+				}),
+				image: new style_Circle({
+					radius: 5,
+					stroke: new style_Stroke({
+						color: 'rgba(0, 0, 0, 0.7)'
+					}),
+					fill: new style_Fill({
+						color: 'rgba(255, 255, 255, 0.2)'
+					})
+				})
+			})
+		});
+
+		var listener;
+		this.draw_.on('drawstart',
+			function(evt) {
+				// set sketch
+				self.sketch = evt.feature;
+
+				/** @type {module:ol/coordinate~Coordinate|undefined} */
+				var tooltipCoord = evt.coordinate;
+
+				listener = self.sketch.getGeometry().on('change', function(evt) {
+					var geom = evt.target;
+					var output;
+					if (geom instanceof geom_Polygon) {
+						output = formatArea(geom);
+						tooltipCoord = geom.getInteriorPoint().getCoordinates();
+					} else if (geom instanceof geom_LineString) {
+						output = self.formatLength(geom);
+						tooltipCoord = geom.getLastCoordinate();
+					}
+					self.measureTooltipElement.innerHTML = output;
+					self.measureTooltip.setPosition(tooltipCoord);
+				});
+			});
+
+		this.draw_.on('drawend',
+			function() {
+				self.measureTooltipElement.className = 'tooltip tooltip-static';
+				self.measureTooltip.setOffset([0, -7]);
+				// unset sketch
+				self.sketch = null;
+				// unset tooltip so that a new one can be created
+				self.measureTooltipElement = null;
+				self.createMeasureTooltip();
+				Object(ol_Observable["unByKey"])(listener);
+			});
+	
+	}
+
+	if ( Control ) MessureControl.__proto__ = Control;
+	MessureControl.prototype = Object.create( Control && Control.prototype );
+	MessureControl.prototype.constructor = MessureControl;
+
+	/**
+	 * @param {MouseEvent} event The event to handle
+	 * @private
+	 */
+	MessureControl.prototype.handleClick_ = function handleClick_ (event) {
+		event.preventDefault();
+		this.handleMessureControl_();
+	};
+
+
+	MessureControl.prototype.isActive = function isActive () {
+		return this.active_;
+	}
+
+	/**
+	 *
+	 */
+	MessureControl.prototype.activate = function activate () {
+		if (this.isActive()) {
+			return;
+		}
+		var map = this.getMap();
+		var self = this;
+		this.pointerMoveHandler_ = (e) => self.pointerMoveHandler(e);
+		map.on('pointermove', this.pointerMoveHandler_);
+		map.addInteraction(this.draw_);
+
+		this.active_ = true;
+	}
+
+	/**
+	 *
+	 */
+	MessureControl.prototype.deactivate = function deactivate () {
+		var map = this.getMap();
+		map.un('pointermove', this.pointerMoveHandler_);
+		map.removeInteraction(this.draw_);
+		this.helpTooltipElement.classList.add('hidden');
+		this.active_ = true;
+	}
+
+	/**
+	 * Handle pointer move.
+	 * @param {module:ol/MapBrowserEvent~MapBrowserEvent} evt The event.
+	 */
+	MessureControl.prototype.pointerMoveHandler = function pointerMoveHandler (evt) {
+		if (evt.dragging) {
+			return;
+		}
+		/** @type {string} */
+		var helpMsg = 'Click to start drawing';
+
+		if (this.sketch) {
+			var geom = (this.sketch.getGeometry());
+			if (geom instanceof geom_Polygon) {
+				helpMsg = this.continuePolygonMsg;
+			} else if (geom instanceof geom_LineString) {
+				helpMsg = this.continueLineMsg;
+			}
+		}
+
+		this.helpTooltipElement.innerHTML = helpMsg;
+		this.helpTooltip.setPosition(evt.coordinate);
+
+		this.helpTooltipElement.classList.remove('hidden');
+	};
+
+	/**
+	 * @param {HTMLElement} element Target element
+	 * @param {boolean} fullscreen True if fullscreen class name should be active
+	 * @private
+	 */
+	MessureControl.prototype.setClassName_ = function setClassName_ (element, fullscreen) {
+		var activeClassName = this.cssClassName_ + '-true';
+		var inactiveClassName = this.cssClassName_ + '-false';
+		var nextClassName = fullscreen ? activeClassName : inactiveClassName;
+		element.classList.remove(activeClassName);
+		element.classList.remove(inactiveClassName);
+		element.classList.add(nextClassName);
+	};
+
+	/**
+	 * @inheritDoc
+	 * @api
+	 */
+	MessureControl.prototype.setMap = function setMap (map) {
+		Control.prototype.setMap.call(this, map);
+		var self = this;
+
+		if (map) {
+			this.createHelpTooltip();
+			map.getViewport().addEventListener('mouseout', function() {
+				self.helpTooltipElement.classList.add('hidden');
+			});
+			this.createMeasureTooltip();
+			this.createHelpTooltip();
+		}
+	};
+
+
+	/**
+	 * Creates a new help tooltip
+	 */
+	MessureControl.prototype.createHelpTooltip = function createHelpTooltip() {
+		if (this.helpTooltipElement) {
+			this.helpTooltipElement.parentNode.removeChild(this.helpTooltipElement);
+		}
+		this.helpTooltipElement = document.createElement('div');
+		this.helpTooltipElement.className = 'tooltip hidden';
+		this.helpTooltip = new ol_Overlay({
+			element: this.helpTooltipElement,
+			offset: [15, 0],
+			positioning: 'center-left'
+		});
+		this.getMap().addOverlay(this.helpTooltip);
+	}
+
+	/**
+	 * @private
+	 */
+	MessureControl.prototype.handleMessureControl_ = function handleMessureControl_ () {
+		var map = this.getMap();
+		var self = this;
+		if (!map) {
+			return;
+		}
+		if (this.isActive()) {
+			//exitMessureControl();
+			this.deactivate();
+		} else {
+			this.activate();
+		}
+	};
+
+	/**
+	 * Creates a new measure tooltip
+	 */
+	MessureControl.prototype.createMeasureTooltip = function createMeasureTooltip() {
+		var map = this.getMap();
+		if (this.measureTooltipElement) {
+			measureTooltipElement.parentNode.removeChild(measureTooltipElement);
+		}
+		this.measureTooltipElement = document.createElement('div');
+		this.measureTooltipElement.className = 'tooltip tooltip-measure';
+		this.measureTooltip = new ol_Overlay({
+			element: this.measureTooltipElement,
+			offset: [0, -15],
+			positioning: 'bottom-center'
+		});
+		map.addOverlay(this.measureTooltip);
+	}
+
+		/**
+		 * Format length output.
+		 * @param {module:ol/geom/LineString~LineString} line The line.
+		 * @return {string} The formatted length.
+		 */
+		MessureControl.prototype.formatLength = function formatLength(line) {
+			var length = sphere_getLength(line);
+			var output;
+			if (length > 100) {
+				output = (Math.round(length / 1000 * 100) / 100) +
+						' ' + 'km';
+			} else {
+				output = (Math.round(length * 100) / 100) +
+						' ' + 'm';
+			}
+			return output;
+		};
+
+	return MessureControl;
+}(control_Control["default"]));
+
+/* harmony default export */ var src_MessureControl = (MessureControl_MessureControl);
+
+//# sourceMappingURL=MessureControl.js.map
+
+// EXTERNAL MODULE: ./node_modules/ol-layerswitcher/dist/ol-layerswitcher.js
+var ol_layerswitcher = __webpack_require__(15);
+var ol_layerswitcher_default = /*#__PURE__*/__webpack_require__.n(ol_layerswitcher);
+
 // CONCATENATED MODULE: ./node_modules/ol/layer/TileProperty.js
 /**
  * @module ol/layer/TileProperty
@@ -42110,3345 +49359,6 @@ var OSM = /*@__PURE__*/(function (XYZ) {
 /* harmony default export */ var source_OSM = (OSM);
 
 //# sourceMappingURL=OSM.js.map
-// CONCATENATED MODULE: ./node_modules/ol/style/Image.js
-/**
- * @module ol/style/Image
- */
-
-
-
-/**
- * @typedef {Object} Options
- * @property {number} opacity
- * @property {boolean} rotateWithView
- * @property {number} rotation
- * @property {number} scale
- */
-
-
-/**
- * @classdesc
- * A base class used for creating subclasses and not instantiated in
- * apps. Base class for {@link module:ol/style/Icon~Icon}, {@link module:ol/style/Circle~CircleStyle} and
- * {@link module:ol/style/RegularShape~RegularShape}.
- * @abstract
- * @api
- */
-var Image_ImageStyle = function ImageStyle(options) {
-
-  /**
-   * @private
-   * @type {number}
-   */
-  this.opacity_ = options.opacity;
-
-  /**
-   * @private
-   * @type {boolean}
-   */
-  this.rotateWithView_ = options.rotateWithView;
-
-  /**
-   * @private
-   * @type {number}
-   */
-  this.rotation_ = options.rotation;
-
-  /**
-   * @private
-   * @type {number}
-   */
-  this.scale_ = options.scale;
-
-};
-
-/**
- * Clones the style.
- * @return {ImageStyle} The cloned style.
- * @api
- */
-Image_ImageStyle.prototype.clone = function clone () {
-  return new Image_ImageStyle({
-    opacity: this.getOpacity(),
-    scale: this.getScale(),
-    rotation: this.getRotation(),
-    rotateWithView: this.getRotateWithView()
-  });
-};
-
-/**
- * Get the symbolizer opacity.
- * @return {number} Opacity.
- * @api
- */
-Image_ImageStyle.prototype.getOpacity = function getOpacity () {
-  return this.opacity_;
-};
-
-/**
- * Determine whether the symbolizer rotates with the map.
- * @return {boolean} Rotate with map.
- * @api
- */
-Image_ImageStyle.prototype.getRotateWithView = function getRotateWithView () {
-  return this.rotateWithView_;
-};
-
-/**
- * Get the symoblizer rotation.
- * @return {number} Rotation.
- * @api
- */
-Image_ImageStyle.prototype.getRotation = function getRotation () {
-  return this.rotation_;
-};
-
-/**
- * Get the symbolizer scale.
- * @return {number} Scale.
- * @api
- */
-Image_ImageStyle.prototype.getScale = function getScale () {
-  return this.scale_;
-};
-
-/**
- * This method is deprecated and always returns false.
- * @return {boolean} false.
- * @deprecated
- * @api
- */
-Image_ImageStyle.prototype.getSnapToPixel = function getSnapToPixel () {
-  return false;
-};
-
-/**
- * Get the anchor point in pixels. The anchor determines the center point for the
- * symbolizer.
- * @abstract
- * @return {Array<number>} Anchor.
- */
-Image_ImageStyle.prototype.getAnchor = function getAnchor () {
-  return Object(util["b" /* abstract */])();
-};
-
-/**
- * Get the image element for the symbolizer.
- * @abstract
- * @param {number} pixelRatio Pixel ratio.
- * @return {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement} Image element.
- */
-Image_ImageStyle.prototype.getImage = function getImage (pixelRatio) {
-  return Object(util["b" /* abstract */])();
-};
-
-/**
- * @abstract
- * @param {number} pixelRatio Pixel ratio.
- * @return {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement} Image element.
- */
-Image_ImageStyle.prototype.getHitDetectionImage = function getHitDetectionImage (pixelRatio) {
-  return Object(util["b" /* abstract */])();
-};
-
-/**
- * @abstract
- * @return {import("../ImageState.js").default} Image state.
- */
-Image_ImageStyle.prototype.getImageState = function getImageState () {
-  return Object(util["b" /* abstract */])();
-};
-
-/**
- * @abstract
- * @return {import("../size.js").Size} Image size.
- */
-Image_ImageStyle.prototype.getImageSize = function getImageSize () {
-  return Object(util["b" /* abstract */])();
-};
-
-/**
- * @abstract
- * @return {import("../size.js").Size} Size of the hit-detection image.
- */
-Image_ImageStyle.prototype.getHitDetectionImageSize = function getHitDetectionImageSize () {
-  return Object(util["b" /* abstract */])();
-};
-
-/**
- * Get the origin of the symbolizer.
- * @abstract
- * @return {Array<number>} Origin.
- */
-Image_ImageStyle.prototype.getOrigin = function getOrigin () {
-  return Object(util["b" /* abstract */])();
-};
-
-/**
- * Get the size of the symbolizer (in pixels).
- * @abstract
- * @return {import("../size.js").Size} Size.
- */
-Image_ImageStyle.prototype.getSize = function getSize () {
-  return Object(util["b" /* abstract */])();
-};
-
-/**
- * Set the opacity.
- *
- * @param {number} opacity Opacity.
- * @api
- */
-Image_ImageStyle.prototype.setOpacity = function setOpacity (opacity) {
-  this.opacity_ = opacity;
-};
-
-/**
- * Set whether to rotate the style with the view.
- *
- * @param {boolean} rotateWithView Rotate with map.
- * @api
- */
-Image_ImageStyle.prototype.setRotateWithView = function setRotateWithView (rotateWithView) {
-  this.rotateWithView_ = rotateWithView;
-};
-
-/**
- * Set the rotation.
- *
- * @param {number} rotation Rotation.
- * @api
- */
-Image_ImageStyle.prototype.setRotation = function setRotation (rotation) {
-  this.rotation_ = rotation;
-};
-/**
- * Set the scale.
- *
- * @param {number} scale Scale.
- * @api
- */
-Image_ImageStyle.prototype.setScale = function setScale (scale) {
-  this.scale_ = scale;
-};
-
-/**
- * This method is deprecated and does nothing.
- * @param {boolean} snapToPixel Snap to pixel?
- * @deprecated
- * @api
- */
-Image_ImageStyle.prototype.setSnapToPixel = function setSnapToPixel (snapToPixel) {};
-
-/**
- * @abstract
- * @param {function(this: T, import("../events/Event.js").default)} listener Listener function.
- * @param {T} thisArg Value to use as `this` when executing `listener`.
- * @return {import("../events.js").EventsKey|undefined} Listener key.
- * @template T
- */
-Image_ImageStyle.prototype.listenImageChange = function listenImageChange (listener, thisArg) {
-  return Object(util["b" /* abstract */])();
-};
-
-/**
- * Load not yet loaded URI.
- * @abstract
- */
-Image_ImageStyle.prototype.load = function load () {
-  Object(util["b" /* abstract */])();
-};
-
-/**
- * @abstract
- * @param {function(this: T, import("../events/Event.js").default)} listener Listener function.
- * @param {T} thisArg Value to use as `this` when executing `listener`.
- * @template T
- */
-Image_ImageStyle.prototype.unlistenImageChange = function unlistenImageChange (listener, thisArg) {
-  Object(util["b" /* abstract */])();
-};
-
-/* harmony default export */ var style_Image = (Image_ImageStyle);
-
-//# sourceMappingURL=Image.js.map
-// CONCATENATED MODULE: ./node_modules/ol/style/RegularShape.js
-/**
- * @module ol/style/RegularShape
- */
-
-
-
-
-
-
-
-
-
-
-/**
- * Specify radius for regular polygons, or radius1 and radius2 for stars.
- * @typedef {Object} Options
- * @property {import("./Fill.js").default} [fill] Fill style.
- * @property {number} points Number of points for stars and regular polygons. In case of a polygon, the number of points
- * is the number of sides.
- * @property {number} [radius] Radius of a regular polygon.
- * @property {number} [radius1] Outer radius of a star.
- * @property {number} [radius2] Inner radius of a star.
- * @property {number} [angle=0] Shape's angle in radians. A value of 0 will have one of the shape's point facing up.
- * @property {import("./Stroke.js").default} [stroke] Stroke style.
- * @property {number} [rotation=0] Rotation in radians (positive rotation clockwise).
- * @property {boolean} [rotateWithView=false] Whether to rotate the shape with the view.
- * @property {import("./AtlasManager.js").default} [atlasManager] The atlas manager to use for this symbol. When
- * using WebGL it is recommended to use an atlas manager to avoid texture switching. If an atlas manager is given, the
- * symbol is added to an atlas. By default no atlas manager is used.
- */
-
-
-/**
- * @typedef {Object} RenderOptions
- * @property {import("../colorlike.js").ColorLike} [strokeStyle]
- * @property {number} strokeWidth
- * @property {number} size
- * @property {string} lineCap
- * @property {Array<number>} lineDash
- * @property {number} lineDashOffset
- * @property {string} lineJoin
- * @property {number} miterLimit
- */
-
-
-/**
- * @classdesc
- * Set regular shape style for vector features. The resulting shape will be
- * a regular polygon when `radius` is provided, or a star when `radius1` and
- * `radius2` are provided.
- * @api
- */
-var RegularShape_RegularShape = /*@__PURE__*/(function (ImageStyle) {
-  function RegularShape(options) {
-    /**
-     * @type {boolean}
-     */
-    var rotateWithView = options.rotateWithView !== undefined ?
-      options.rotateWithView : false;
-
-    ImageStyle.call(this, {
-      opacity: 1,
-      rotateWithView: rotateWithView,
-      rotation: options.rotation !== undefined ? options.rotation : 0,
-      scale: 1
-    });
-
-    /**
-     * @private
-     * @type {Array<string|number>}
-     */
-    this.checksums_ = null;
-
-    /**
-     * @private
-     * @type {HTMLCanvasElement}
-     */
-    this.canvas_ = null;
-
-    /**
-     * @private
-     * @type {HTMLCanvasElement}
-     */
-    this.hitDetectionCanvas_ = null;
-
-    /**
-     * @private
-     * @type {import("./Fill.js").default}
-     */
-    this.fill_ = options.fill !== undefined ? options.fill : null;
-
-    /**
-     * @private
-     * @type {Array<number>}
-     */
-    this.origin_ = [0, 0];
-
-    /**
-     * @private
-     * @type {number}
-     */
-    this.points_ = options.points;
-
-    /**
-     * @protected
-     * @type {number}
-     */
-    this.radius_ = /** @type {number} */ (options.radius !== undefined ?
-      options.radius : options.radius1);
-
-    /**
-     * @private
-     * @type {number|undefined}
-     */
-    this.radius2_ = options.radius2;
-
-    /**
-     * @private
-     * @type {number}
-     */
-    this.angle_ = options.angle !== undefined ? options.angle : 0;
-
-    /**
-     * @private
-     * @type {import("./Stroke.js").default}
-     */
-    this.stroke_ = options.stroke !== undefined ? options.stroke : null;
-
-    /**
-     * @private
-     * @type {Array<number>}
-     */
-    this.anchor_ = null;
-
-    /**
-     * @private
-     * @type {import("../size.js").Size}
-     */
-    this.size_ = null;
-
-    /**
-     * @private
-     * @type {import("../size.js").Size}
-     */
-    this.imageSize_ = null;
-
-    /**
-     * @private
-     * @type {import("../size.js").Size}
-     */
-    this.hitDetectionImageSize_ = null;
-
-    /**
-     * @protected
-     * @type {import("./AtlasManager.js").default|undefined}
-     */
-    this.atlasManager_ = options.atlasManager;
-
-    this.render_(this.atlasManager_);
-
-  }
-
-  if ( ImageStyle ) RegularShape.__proto__ = ImageStyle;
-  RegularShape.prototype = Object.create( ImageStyle && ImageStyle.prototype );
-  RegularShape.prototype.constructor = RegularShape;
-
-  /**
-   * Clones the style. If an atlasmanager was provided to the original style it will be used in the cloned style, too.
-   * @return {RegularShape} The cloned style.
-   * @api
-   */
-  RegularShape.prototype.clone = function clone () {
-    var style = new RegularShape({
-      fill: this.getFill() ? this.getFill().clone() : undefined,
-      points: this.getPoints(),
-      radius: this.getRadius(),
-      radius2: this.getRadius2(),
-      angle: this.getAngle(),
-      stroke: this.getStroke() ? this.getStroke().clone() : undefined,
-      rotation: this.getRotation(),
-      rotateWithView: this.getRotateWithView(),
-      atlasManager: this.atlasManager_
-    });
-    style.setOpacity(this.getOpacity());
-    style.setScale(this.getScale());
-    return style;
-  };
-
-  /**
-   * @inheritDoc
-   * @api
-   */
-  RegularShape.prototype.getAnchor = function getAnchor () {
-    return this.anchor_;
-  };
-
-  /**
-   * Get the angle used in generating the shape.
-   * @return {number} Shape's rotation in radians.
-   * @api
-   */
-  RegularShape.prototype.getAngle = function getAngle () {
-    return this.angle_;
-  };
-
-  /**
-   * Get the fill style for the shape.
-   * @return {import("./Fill.js").default} Fill style.
-   * @api
-   */
-  RegularShape.prototype.getFill = function getFill () {
-    return this.fill_;
-  };
-
-  /**
-   * @inheritDoc
-   */
-  RegularShape.prototype.getHitDetectionImage = function getHitDetectionImage (pixelRatio) {
-    return this.hitDetectionCanvas_;
-  };
-
-  /**
-   * @inheritDoc
-   * @api
-   */
-  RegularShape.prototype.getImage = function getImage (pixelRatio) {
-    return this.canvas_;
-  };
-
-  /**
-   * @inheritDoc
-   */
-  RegularShape.prototype.getImageSize = function getImageSize () {
-    return this.imageSize_;
-  };
-
-  /**
-   * @inheritDoc
-   */
-  RegularShape.prototype.getHitDetectionImageSize = function getHitDetectionImageSize () {
-    return this.hitDetectionImageSize_;
-  };
-
-  /**
-   * @inheritDoc
-   */
-  RegularShape.prototype.getImageState = function getImageState () {
-    return ImageState.LOADED;
-  };
-
-  /**
-   * @inheritDoc
-   * @api
-   */
-  RegularShape.prototype.getOrigin = function getOrigin () {
-    return this.origin_;
-  };
-
-  /**
-   * Get the number of points for generating the shape.
-   * @return {number} Number of points for stars and regular polygons.
-   * @api
-   */
-  RegularShape.prototype.getPoints = function getPoints () {
-    return this.points_;
-  };
-
-  /**
-   * Get the (primary) radius for the shape.
-   * @return {number} Radius.
-   * @api
-   */
-  RegularShape.prototype.getRadius = function getRadius () {
-    return this.radius_;
-  };
-
-  /**
-   * Get the secondary radius for the shape.
-   * @return {number|undefined} Radius2.
-   * @api
-   */
-  RegularShape.prototype.getRadius2 = function getRadius2 () {
-    return this.radius2_;
-  };
-
-  /**
-   * @inheritDoc
-   * @api
-   */
-  RegularShape.prototype.getSize = function getSize () {
-    return this.size_;
-  };
-
-  /**
-   * Get the stroke style for the shape.
-   * @return {import("./Stroke.js").default} Stroke style.
-   * @api
-   */
-  RegularShape.prototype.getStroke = function getStroke () {
-    return this.stroke_;
-  };
-
-  /**
-   * @inheritDoc
-   */
-  RegularShape.prototype.listenImageChange = function listenImageChange (listener, thisArg) {
-    return undefined;
-  };
-
-  /**
-   * @inheritDoc
-   */
-  RegularShape.prototype.load = function load () {};
-
-  /**
-   * @inheritDoc
-   */
-  RegularShape.prototype.unlistenImageChange = function unlistenImageChange (listener, thisArg) {};
-
-  /**
-   * @protected
-   * @param {import("./AtlasManager.js").default|undefined} atlasManager An atlas manager.
-   */
-  RegularShape.prototype.render_ = function render_ (atlasManager) {
-    var imageSize;
-    var lineCap = '';
-    var lineJoin = '';
-    var miterLimit = 0;
-    var lineDash = null;
-    var lineDashOffset = 0;
-    var strokeStyle;
-    var strokeWidth = 0;
-
-    if (this.stroke_) {
-      strokeStyle = this.stroke_.getColor();
-      if (strokeStyle === null) {
-        strokeStyle = defaultStrokeStyle;
-      }
-      strokeStyle = asColorLike(strokeStyle);
-      strokeWidth = this.stroke_.getWidth();
-      if (strokeWidth === undefined) {
-        strokeWidth = defaultLineWidth;
-      }
-      lineDash = this.stroke_.getLineDash();
-      lineDashOffset = this.stroke_.getLineDashOffset();
-      if (!CANVAS_LINE_DASH) {
-        lineDash = null;
-        lineDashOffset = 0;
-      }
-      lineJoin = this.stroke_.getLineJoin();
-      if (lineJoin === undefined) {
-        lineJoin = defaultLineJoin;
-      }
-      lineCap = this.stroke_.getLineCap();
-      if (lineCap === undefined) {
-        lineCap = defaultLineCap;
-      }
-      miterLimit = this.stroke_.getMiterLimit();
-      if (miterLimit === undefined) {
-        miterLimit = defaultMiterLimit;
-      }
-    }
-
-    var size = 2 * (this.radius_ + strokeWidth) + 1;
-
-    /** @type {RenderOptions} */
-    var renderOptions = {
-      strokeStyle: strokeStyle,
-      strokeWidth: strokeWidth,
-      size: size,
-      lineCap: lineCap,
-      lineDash: lineDash,
-      lineDashOffset: lineDashOffset,
-      lineJoin: lineJoin,
-      miterLimit: miterLimit
-    };
-
-    if (atlasManager === undefined) {
-      // no atlas manager is used, create a new canvas
-      var context = Object(dom["a" /* createCanvasContext2D */])(size, size);
-      this.canvas_ = context.canvas;
-
-      // canvas.width and height are rounded to the closest integer
-      size = this.canvas_.width;
-      imageSize = size;
-
-      this.draw_(renderOptions, context, 0, 0);
-
-      this.createHitDetectionCanvas_(renderOptions);
-    } else {
-      // an atlas manager is used, add the symbol to an atlas
-      size = Math.round(size);
-
-      var hasCustomHitDetectionImage = !this.fill_;
-      var renderHitDetectionCallback;
-      if (hasCustomHitDetectionImage) {
-        // render the hit-detection image into a separate atlas image
-        renderHitDetectionCallback =
-            this.drawHitDetectionCanvas_.bind(this, renderOptions);
-      }
-
-      var id = this.getChecksum();
-      var info = atlasManager.add(
-        id, size, size, this.draw_.bind(this, renderOptions),
-        renderHitDetectionCallback);
-
-      this.canvas_ = info.image;
-      this.origin_ = [info.offsetX, info.offsetY];
-      imageSize = info.image.width;
-
-      if (hasCustomHitDetectionImage) {
-        this.hitDetectionCanvas_ = info.hitImage;
-        this.hitDetectionImageSize_ =
-            [info.hitImage.width, info.hitImage.height];
-      } else {
-        this.hitDetectionCanvas_ = this.canvas_;
-        this.hitDetectionImageSize_ = [imageSize, imageSize];
-      }
-    }
-
-    this.anchor_ = [size / 2, size / 2];
-    this.size_ = [size, size];
-    this.imageSize_ = [imageSize, imageSize];
-  };
-
-  /**
-   * @private
-   * @param {RenderOptions} renderOptions Render options.
-   * @param {CanvasRenderingContext2D} context The rendering context.
-   * @param {number} x The origin for the symbol (x).
-   * @param {number} y The origin for the symbol (y).
-   */
-  RegularShape.prototype.draw_ = function draw_ (renderOptions, context, x, y) {
-    var i, angle0, radiusC;
-    // reset transform
-    context.setTransform(1, 0, 0, 1, 0, 0);
-
-    // then move to (x, y)
-    context.translate(x, y);
-
-    context.beginPath();
-
-    var points = this.points_;
-    if (points === Infinity) {
-      context.arc(
-        renderOptions.size / 2, renderOptions.size / 2,
-        this.radius_, 0, 2 * Math.PI, true);
-    } else {
-      var radius2 = (this.radius2_ !== undefined) ? this.radius2_
-        : this.radius_;
-      if (radius2 !== this.radius_) {
-        points = 2 * points;
-      }
-      for (i = 0; i <= points; i++) {
-        angle0 = i * 2 * Math.PI / points - Math.PI / 2 + this.angle_;
-        radiusC = i % 2 === 0 ? this.radius_ : radius2;
-        context.lineTo(renderOptions.size / 2 + radiusC * Math.cos(angle0),
-          renderOptions.size / 2 + radiusC * Math.sin(angle0));
-      }
-    }
-
-
-    if (this.fill_) {
-      var color = this.fill_.getColor();
-      if (color === null) {
-        color = defaultFillStyle;
-      }
-      context.fillStyle = asColorLike(color);
-      context.fill();
-    }
-    if (this.stroke_) {
-      context.strokeStyle = renderOptions.strokeStyle;
-      context.lineWidth = renderOptions.strokeWidth;
-      if (renderOptions.lineDash) {
-        context.setLineDash(renderOptions.lineDash);
-        context.lineDashOffset = renderOptions.lineDashOffset;
-      }
-      context.lineCap = /** @type {CanvasLineCap} */ (renderOptions.lineCap);
-      context.lineJoin = /** @type {CanvasLineJoin} */ (renderOptions.lineJoin);
-      context.miterLimit = renderOptions.miterLimit;
-      context.stroke();
-    }
-    context.closePath();
-  };
-
-  /**
-   * @private
-   * @param {RenderOptions} renderOptions Render options.
-   */
-  RegularShape.prototype.createHitDetectionCanvas_ = function createHitDetectionCanvas_ (renderOptions) {
-    this.hitDetectionImageSize_ = [renderOptions.size, renderOptions.size];
-    if (this.fill_) {
-      this.hitDetectionCanvas_ = this.canvas_;
-      return;
-    }
-
-    // if no fill style is set, create an extra hit-detection image with a
-    // default fill style
-    var context = Object(dom["a" /* createCanvasContext2D */])(renderOptions.size, renderOptions.size);
-    this.hitDetectionCanvas_ = context.canvas;
-
-    this.drawHitDetectionCanvas_(renderOptions, context, 0, 0);
-  };
-
-  /**
-   * @private
-   * @param {RenderOptions} renderOptions Render options.
-   * @param {CanvasRenderingContext2D} context The context.
-   * @param {number} x The origin for the symbol (x).
-   * @param {number} y The origin for the symbol (y).
-   */
-  RegularShape.prototype.drawHitDetectionCanvas_ = function drawHitDetectionCanvas_ (renderOptions, context, x, y) {
-    // reset transform
-    context.setTransform(1, 0, 0, 1, 0, 0);
-
-    // then move to (x, y)
-    context.translate(x, y);
-
-    context.beginPath();
-
-    var points = this.points_;
-    if (points === Infinity) {
-      context.arc(
-        renderOptions.size / 2, renderOptions.size / 2,
-        this.radius_, 0, 2 * Math.PI, true);
-    } else {
-      var radius2 = (this.radius2_ !== undefined) ? this.radius2_
-        : this.radius_;
-      if (radius2 !== this.radius_) {
-        points = 2 * points;
-      }
-      var i, radiusC, angle0;
-      for (i = 0; i <= points; i++) {
-        angle0 = i * 2 * Math.PI / points - Math.PI / 2 + this.angle_;
-        radiusC = i % 2 === 0 ? this.radius_ : radius2;
-        context.lineTo(renderOptions.size / 2 + radiusC * Math.cos(angle0),
-          renderOptions.size / 2 + radiusC * Math.sin(angle0));
-      }
-    }
-
-    context.fillStyle = asString(defaultFillStyle);
-    context.fill();
-    if (this.stroke_) {
-      context.strokeStyle = renderOptions.strokeStyle;
-      context.lineWidth = renderOptions.strokeWidth;
-      if (renderOptions.lineDash) {
-        context.setLineDash(renderOptions.lineDash);
-        context.lineDashOffset = renderOptions.lineDashOffset;
-      }
-      context.stroke();
-    }
-    context.closePath();
-  };
-
-  /**
-   * @return {string} The checksum.
-   */
-  RegularShape.prototype.getChecksum = function getChecksum () {
-    var strokeChecksum = this.stroke_ ?
-      this.stroke_.getChecksum() : '-';
-    var fillChecksum = this.fill_ ?
-      this.fill_.getChecksum() : '-';
-
-    var recalculate = !this.checksums_ ||
-        (strokeChecksum != this.checksums_[1] ||
-        fillChecksum != this.checksums_[2] ||
-        this.radius_ != this.checksums_[3] ||
-        this.radius2_ != this.checksums_[4] ||
-        this.angle_ != this.checksums_[5] ||
-        this.points_ != this.checksums_[6]);
-
-    if (recalculate) {
-      var checksum = 'r' + strokeChecksum + fillChecksum +
-          (this.radius_ !== undefined ? this.radius_.toString() : '-') +
-          (this.radius2_ !== undefined ? this.radius2_.toString() : '-') +
-          (this.angle_ !== undefined ? this.angle_.toString() : '-') +
-          (this.points_ !== undefined ? this.points_.toString() : '-');
-      this.checksums_ = [checksum, strokeChecksum, fillChecksum,
-        this.radius_, this.radius2_, this.angle_, this.points_];
-    }
-
-    return /** @type {string} */ (this.checksums_[0]);
-  };
-
-  return RegularShape;
-}(style_Image));
-
-
-/* harmony default export */ var style_RegularShape = (RegularShape_RegularShape);
-
-//# sourceMappingURL=RegularShape.js.map
-// CONCATENATED MODULE: ./node_modules/ol/style/Circle.js
-/**
- * @module ol/style/Circle
- */
-
-
-
-
-/**
- * @typedef {Object} Options
- * @property {import("./Fill.js").default} [fill] Fill style.
- * @property {number} radius Circle radius.
- * @property {import("./Stroke.js").default} [stroke] Stroke style.
- * @property {import("./AtlasManager.js").default} [atlasManager] The atlas manager to use for this circle.
- * When using WebGL it is recommended to use an atlas manager to avoid texture switching. If an atlas manager is given,
- * the circle is added to an atlas. By default no atlas manager is used.
- */
-
-
-/**
- * @classdesc
- * Set circle style for vector features.
- * @api
- */
-var CircleStyle = /*@__PURE__*/(function (RegularShape) {
-  function CircleStyle(opt_options) {
-
-    var options = opt_options || /** @type {Options} */ ({});
-
-    RegularShape.call(this, {
-      points: Infinity,
-      fill: options.fill,
-      radius: options.radius,
-      stroke: options.stroke,
-      atlasManager: options.atlasManager
-    });
-
-  }
-
-  if ( RegularShape ) CircleStyle.__proto__ = RegularShape;
-  CircleStyle.prototype = Object.create( RegularShape && RegularShape.prototype );
-  CircleStyle.prototype.constructor = CircleStyle;
-
-  /**
-  * Clones the style.  If an atlasmanager was provided to the original style it will be used in the cloned style, too.
-  * @return {CircleStyle} The cloned style.
-  * @override
-  * @api
-  */
-  CircleStyle.prototype.clone = function clone () {
-    var style = new CircleStyle({
-      fill: this.getFill() ? this.getFill().clone() : undefined,
-      stroke: this.getStroke() ? this.getStroke().clone() : undefined,
-      radius: this.getRadius(),
-      atlasManager: this.atlasManager_
-    });
-    style.setOpacity(this.getOpacity());
-    style.setScale(this.getScale());
-    return style;
-  };
-
-  /**
-  * Set the circle radius.
-  *
-  * @param {number} radius Circle radius.
-  * @api
-  */
-  CircleStyle.prototype.setRadius = function setRadius (radius) {
-    this.radius_ = radius;
-    this.render_(this.atlasManager_);
-  };
-
-  return CircleStyle;
-}(style_RegularShape));
-
-
-/* harmony default export */ var Circle = (CircleStyle);
-
-//# sourceMappingURL=Circle.js.map
-// CONCATENATED MODULE: ./node_modules/ol/style/Fill.js
-/**
- * @module ol/style/Fill
- */
-
-
-
-
-/**
- * @typedef {Object} Options
- * @property {import("../color.js").Color|import("../colorlike.js").ColorLike} [color] A color, gradient or pattern.
- * See {@link module:ol/color~Color} and {@link module:ol/colorlike~ColorLike} for possible formats.
- * Default null; if null, the Canvas/renderer default black will be used.
- */
-
-
-/**
- * @classdesc
- * Set fill style for vector features.
- * @api
- */
-var Fill = function Fill(opt_options) {
-
-  var options = opt_options || {};
-
-  /**
-   * @private
-   * @type {import("../color.js").Color|import("../colorlike.js").ColorLike}
-   */
-  this.color_ = options.color !== undefined ? options.color : null;
-
-  /**
-   * @private
-   * @type {string|undefined}
-   */
-  this.checksum_ = undefined;
-};
-
-/**
- * Clones the style. The color is not cloned if it is an {@link module:ol/colorlike~ColorLike}.
- * @return {Fill} The cloned style.
- * @api
- */
-Fill.prototype.clone = function clone () {
-  var color = this.getColor();
-  return new Fill({
-    color: Array.isArray(color) ? color.slice() : color || undefined
-  });
-};
-
-/**
- * Get the fill color.
- * @return {import("../color.js").Color|import("../colorlike.js").ColorLike} Color.
- * @api
- */
-Fill.prototype.getColor = function getColor () {
-  return this.color_;
-};
-
-/**
- * Set the color.
- *
- * @param {import("../color.js").Color|import("../colorlike.js").ColorLike} color Color.
- * @api
- */
-Fill.prototype.setColor = function setColor (color) {
-  this.color_ = color;
-  this.checksum_ = undefined;
-};
-
-/**
- * @return {string} The checksum.
- */
-Fill.prototype.getChecksum = function getChecksum () {
-  if (this.checksum_ === undefined) {
-    var color = this.color_;
-    if (color) {
-      if (Array.isArray(color) || typeof color == 'string') {
-        this.checksum_ = 'f' + asString(/** @type {import("../color.js").Color|string} */ (color));
-      } else {
-        this.checksum_ = Object(util["c" /* getUid */])(this.color_);
-      }
-    } else {
-      this.checksum_ = 'f-';
-    }
-  }
-
-  return this.checksum_;
-};
-
-/* harmony default export */ var style_Fill = (Fill);
-
-//# sourceMappingURL=Fill.js.map
-// CONCATENATED MODULE: ./node_modules/ol/style/Style.js
-/**
- * @module ol/style/Style
- */
-
-/**
- * Feature styles.
- *
- * If no style is defined, the following default style is used:
- * ```js
- *  import {Fill, Stroke, Circle, Style} from 'ol/style';
- *
- *  var fill = new Fill({
- *    color: 'rgba(255,255,255,0.4)'
- *  });
- *  var stroke = new Stroke({
- *    color: '#3399CC',
- *    width: 1.25
- *  });
- *  var styles = [
- *    new Style({
- *      image: new Circle({
- *        fill: fill,
- *        stroke: stroke,
- *        radius: 5
- *      }),
- *      fill: fill,
- *      stroke: stroke
- *    })
- *  ];
- * ```
- *
- * A separate editing style has the following defaults:
- * ```js
- *  import {Fill, Stroke, Circle, Style} from 'ol/style';
- *  import GeometryType from 'ol/geom/GeometryType';
- *
- *  var white = [255, 255, 255, 1];
- *  var blue = [0, 153, 255, 1];
- *  var width = 3;
- *  styles[GeometryType.POLYGON] = [
- *    new Style({
- *      fill: new Fill({
- *        color: [255, 255, 255, 0.5]
- *      })
- *    })
- *  ];
- *  styles[GeometryType.MULTI_POLYGON] =
- *      styles[GeometryType.POLYGON];
- *  styles[GeometryType.LINE_STRING] = [
- *    new Style({
- *      stroke: new Stroke({
- *        color: white,
- *        width: width + 2
- *      })
- *    }),
- *    new Style({
- *      stroke: new Stroke({
- *        color: blue,
- *        width: width
- *      })
- *    })
- *  ];
- *  styles[GeometryType.MULTI_LINE_STRING] =
- *      styles[GeometryType.LINE_STRING];
- *  styles[GeometryType.POINT] = [
- *    new Style({
- *      image: new Circle({
- *        radius: width * 2,
- *        fill: new Fill({
- *          color: blue
- *        }),
- *        stroke: new Stroke({
- *          color: white,
- *          width: width / 2
- *        })
- *      }),
- *      zIndex: Infinity
- *    })
- *  ];
- *  styles[GeometryType.MULTI_POINT] =
- *      styles[GeometryType.POINT];
- *  styles[GeometryType.GEOMETRY_COLLECTION] =
- *      styles[GeometryType.POLYGON].concat(
- *          styles[GeometryType.LINE_STRING],
- *          styles[GeometryType.POINT]
- *      );
- * ```
- */
-
-
-
-
-
-
-
-/**
- * A function that takes an {@link module:ol/Feature} and a `{number}`
- * representing the view's resolution. The function should return a
- * {@link module:ol/style/Style} or an array of them. This way e.g. a
- * vector layer can be styled.
- *
- * @typedef {function(import("../Feature.js").FeatureLike, number):(Style|Array<Style>)} StyleFunction
- */
-
-/**
- * A {@link Style}, an array of {@link Style}, or a {@link StyleFunction}.
- * @typedef {Style|Array<Style>|StyleFunction} StyleLike
- */
-
-/**
- * A function that takes an {@link module:ol/Feature} as argument and returns an
- * {@link module:ol/geom/Geometry} that will be rendered and styled for the feature.
- *
- * @typedef {function(import("../Feature.js").FeatureLike):
- *     (import("../geom/Geometry.js").default|import("../render/Feature.js").default|undefined)} GeometryFunction
- */
-
-
-/**
- * Custom renderer function. Takes two arguments:
- *
- * 1. The pixel coordinates of the geometry in GeoJSON notation.
- * 2. The {@link module:ol/render~State} of the layer renderer.
- *
- * @typedef {function((import("../coordinate.js").Coordinate|Array<import("../coordinate.js").Coordinate>|Array<Array<import("../coordinate.js").Coordinate>>),import("../render.js").State)}
- * RenderFunction
- */
-
-
-/**
- * @typedef {Object} Options
- * @property {string|import("../geom/Geometry.js").default|GeometryFunction} [geometry] Feature property or geometry
- * or function returning a geometry to render for this style.
- * @property {import("./Fill.js").default} [fill] Fill style.
- * @property {import("./Image.js").default} [image] Image style.
- * @property {RenderFunction} [renderer] Custom renderer. When configured, `fill`, `stroke` and `image` will be
- * ignored, and the provided function will be called with each render frame for each geometry.
- * @property {import("./Stroke.js").default} [stroke] Stroke style.
- * @property {import("./Text.js").default} [text] Text style.
- * @property {number} [zIndex] Z index.
- */
-
-/**
- * @classdesc
- * Container for vector feature rendering styles. Any changes made to the style
- * or its children through `set*()` methods will not take effect until the
- * feature or layer that uses the style is re-rendered.
- * @api
- */
-var Style = function Style(opt_options) {
-
-  var options = opt_options || {};
-
-  /**
-   * @private
-   * @type {string|import("../geom/Geometry.js").default|GeometryFunction}
-   */
-  this.geometry_ = null;
-
-  /**
-   * @private
-   * @type {!GeometryFunction}
-   */
-  this.geometryFunction_ = defaultGeometryFunction;
-
-  if (options.geometry !== undefined) {
-    this.setGeometry(options.geometry);
-  }
-
-  /**
-   * @private
-   * @type {import("./Fill.js").default}
-   */
-  this.fill_ = options.fill !== undefined ? options.fill : null;
-
-  /**
-     * @private
-     * @type {import("./Image.js").default}
-     */
-  this.image_ = options.image !== undefined ? options.image : null;
-
-  /**
-   * @private
-   * @type {RenderFunction|null}
-   */
-  this.renderer_ = options.renderer !== undefined ? options.renderer : null;
-
-  /**
-   * @private
-   * @type {import("./Stroke.js").default}
-   */
-  this.stroke_ = options.stroke !== undefined ? options.stroke : null;
-
-  /**
-   * @private
-   * @type {import("./Text.js").default}
-   */
-  this.text_ = options.text !== undefined ? options.text : null;
-
-  /**
-   * @private
-   * @type {number|undefined}
-   */
-  this.zIndex_ = options.zIndex;
-
-};
-
-/**
- * Clones the style.
- * @return {Style} The cloned style.
- * @api
- */
-Style.prototype.clone = function clone () {
-  var geometry = this.getGeometry();
-  if (geometry && typeof geometry === 'object') {
-    geometry = /** @type {import("../geom/Geometry.js").default} */ (geometry).clone();
-  }
-  return new Style({
-    geometry: geometry,
-    fill: this.getFill() ? this.getFill().clone() : undefined,
-    image: this.getImage() ? this.getImage().clone() : undefined,
-    stroke: this.getStroke() ? this.getStroke().clone() : undefined,
-    text: this.getText() ? this.getText().clone() : undefined,
-    zIndex: this.getZIndex()
-  });
-};
-
-/**
- * Get the custom renderer function that was configured with
- * {@link #setRenderer} or the `renderer` constructor option.
- * @return {RenderFunction|null} Custom renderer function.
- * @api
- */
-Style.prototype.getRenderer = function getRenderer () {
-  return this.renderer_;
-};
-
-/**
- * Sets a custom renderer function for this style. When set, `fill`, `stroke`
- * and `image` options of the style will be ignored.
- * @param {RenderFunction|null} renderer Custom renderer function.
- * @api
- */
-Style.prototype.setRenderer = function setRenderer (renderer) {
-  this.renderer_ = renderer;
-};
-
-/**
- * Get the geometry to be rendered.
- * @return {string|import("../geom/Geometry.js").default|GeometryFunction}
- * Feature property or geometry or function that returns the geometry that will
- * be rendered with this style.
- * @api
- */
-Style.prototype.getGeometry = function getGeometry () {
-  return this.geometry_;
-};
-
-/**
- * Get the function used to generate a geometry for rendering.
- * @return {!GeometryFunction} Function that is called with a feature
- * and returns the geometry to render instead of the feature's geometry.
- * @api
- */
-Style.prototype.getGeometryFunction = function getGeometryFunction () {
-  return this.geometryFunction_;
-};
-
-/**
- * Get the fill style.
- * @return {import("./Fill.js").default} Fill style.
- * @api
- */
-Style.prototype.getFill = function getFill () {
-  return this.fill_;
-};
-
-/**
- * Set the fill style.
- * @param {import("./Fill.js").default} fill Fill style.
- * @api
- */
-Style.prototype.setFill = function setFill (fill) {
-  this.fill_ = fill;
-};
-
-/**
- * Get the image style.
- * @return {import("./Image.js").default} Image style.
- * @api
- */
-Style.prototype.getImage = function getImage () {
-  return this.image_;
-};
-
-/**
- * Set the image style.
- * @param {import("./Image.js").default} image Image style.
- * @api
- */
-Style.prototype.setImage = function setImage (image) {
-  this.image_ = image;
-};
-
-/**
- * Get the stroke style.
- * @return {import("./Stroke.js").default} Stroke style.
- * @api
- */
-Style.prototype.getStroke = function getStroke () {
-  return this.stroke_;
-};
-
-/**
- * Set the stroke style.
- * @param {import("./Stroke.js").default} stroke Stroke style.
- * @api
- */
-Style.prototype.setStroke = function setStroke (stroke) {
-  this.stroke_ = stroke;
-};
-
-/**
- * Get the text style.
- * @return {import("./Text.js").default} Text style.
- * @api
- */
-Style.prototype.getText = function getText () {
-  return this.text_;
-};
-
-/**
- * Set the text style.
- * @param {import("./Text.js").default} text Text style.
- * @api
- */
-Style.prototype.setText = function setText (text) {
-  this.text_ = text;
-};
-
-/**
- * Get the z-index for the style.
- * @return {number|undefined} ZIndex.
- * @api
- */
-Style.prototype.getZIndex = function getZIndex () {
-  return this.zIndex_;
-};
-
-/**
- * Set a geometry that is rendered instead of the feature's geometry.
- *
- * @param {string|import("../geom/Geometry.js").default|GeometryFunction} geometry
- *   Feature property or geometry or function returning a geometry to render
- *   for this style.
- * @api
- */
-Style.prototype.setGeometry = function setGeometry (geometry) {
-  if (typeof geometry === 'function') {
-    this.geometryFunction_ = geometry;
-  } else if (typeof geometry === 'string') {
-    this.geometryFunction_ = function(feature) {
-      return (
-        /** @type {import("../geom/Geometry.js").default} */ (feature.get(geometry))
-      );
-    };
-  } else if (!geometry) {
-    this.geometryFunction_ = defaultGeometryFunction;
-  } else if (geometry !== undefined) {
-    this.geometryFunction_ = function() {
-      return (
-        /** @type {import("../geom/Geometry.js").default} */ (geometry)
-      );
-    };
-  }
-  this.geometry_ = geometry;
-};
-
-/**
- * Set the z-index.
- *
- * @param {number|undefined} zIndex ZIndex.
- * @api
- */
-Style.prototype.setZIndex = function setZIndex (zIndex) {
-  this.zIndex_ = zIndex;
-};
-
-
-/**
- * Convert the provided object into a style function.  Functions passed through
- * unchanged.  Arrays of Style or single style objects wrapped in a
- * new style function.
- * @param {StyleFunction|Array<Style>|Style} obj
- *     A style function, a single style, or an array of styles.
- * @return {StyleFunction} A style function.
- */
-function toFunction(obj) {
-  var styleFunction;
-
-  if (typeof obj === 'function') {
-    styleFunction = obj;
-  } else {
-    /**
-     * @type {Array<Style>}
-     */
-    var styles;
-    if (Array.isArray(obj)) {
-      styles = obj;
-    } else {
-      assert(typeof /** @type {?} */ (obj).getZIndex === 'function',
-        41); // Expected an `Style` or an array of `Style`
-      var style = /** @type {Style} */ (obj);
-      styles = [style];
-    }
-    styleFunction = function() {
-      return styles;
-    };
-  }
-  return styleFunction;
-}
-
-
-/**
- * @type {Array<Style>}
- */
-var defaultStyles = null;
-
-
-/**
- * @param {import("../Feature.js").FeatureLike} feature Feature.
- * @param {number} resolution Resolution.
- * @return {Array<Style>} Style.
- */
-function createDefaultStyle(feature, resolution) {
-  // We don't use an immediately-invoked function
-  // and a closure so we don't get an error at script evaluation time in
-  // browsers that do not support Canvas. (import("./Circle.js").CircleStyle does
-  // canvas.getContext('2d') at construction time, which will cause an.error
-  // in such browsers.)
-  if (!defaultStyles) {
-    var fill = new style_Fill({
-      color: 'rgba(255,255,255,0.4)'
-    });
-    var stroke = new style_Stroke({
-      color: '#3399CC',
-      width: 1.25
-    });
-    defaultStyles = [
-      new Style({
-        image: new Circle({
-          fill: fill,
-          stroke: stroke,
-          radius: 5
-        }),
-        fill: fill,
-        stroke: stroke
-      })
-    ];
-  }
-  return defaultStyles;
-}
-
-
-/**
- * Default styles for editing features.
- * @return {Object<import("../geom/GeometryType.js").default, Array<Style>>} Styles
- */
-function createEditingStyle() {
-  /** @type {Object<import("../geom/GeometryType.js").default, Array<Style>>} */
-  var styles = {};
-  var white = [255, 255, 255, 1];
-  var blue = [0, 153, 255, 1];
-  var width = 3;
-  styles[GeometryType.POLYGON] = [
-    new Style({
-      fill: new style_Fill({
-        color: [255, 255, 255, 0.5]
-      })
-    })
-  ];
-  styles[GeometryType.MULTI_POLYGON] =
-      styles[GeometryType.POLYGON];
-
-  styles[GeometryType.LINE_STRING] = [
-    new Style({
-      stroke: new style_Stroke({
-        color: white,
-        width: width + 2
-      })
-    }),
-    new Style({
-      stroke: new style_Stroke({
-        color: blue,
-        width: width
-      })
-    })
-  ];
-  styles[GeometryType.MULTI_LINE_STRING] =
-      styles[GeometryType.LINE_STRING];
-
-  styles[GeometryType.CIRCLE] =
-      styles[GeometryType.POLYGON].concat(
-        styles[GeometryType.LINE_STRING]
-      );
-
-
-  styles[GeometryType.POINT] = [
-    new Style({
-      image: new Circle({
-        radius: width * 2,
-        fill: new style_Fill({
-          color: blue
-        }),
-        stroke: new style_Stroke({
-          color: white,
-          width: width / 2
-        })
-      }),
-      zIndex: Infinity
-    })
-  ];
-  styles[GeometryType.MULTI_POINT] =
-      styles[GeometryType.POINT];
-
-  styles[GeometryType.GEOMETRY_COLLECTION] =
-      styles[GeometryType.POLYGON].concat(
-        styles[GeometryType.LINE_STRING],
-        styles[GeometryType.POINT]
-      );
-
-  return styles;
-}
-
-
-/**
- * Function that is called with a feature and returns its default geometry.
- * @param {import("../Feature.js").FeatureLike} feature Feature to get the geometry for.
- * @return {import("../geom/Geometry.js").default|import("../render/Feature.js").default|undefined} Geometry to render.
- */
-function defaultGeometryFunction(feature) {
-  return feature.getGeometry();
-}
-
-/* harmony default export */ var style_Style = (Style);
-
-//# sourceMappingURL=Style.js.map
-// CONCATENATED MODULE: ./node_modules/ol/layer/Vector.js
-/**
- * @module ol/layer/Vector
- */
-
-
-
-
-
-
-
-/**
- * @typedef {Object} Options
- * @property {number} [opacity=1] Opacity (0, 1).
- * @property {boolean} [visible=true] Visibility.
- * @property {import("../extent.js").Extent} [extent] The bounding extent for layer rendering.  The layer will not be
- * rendered outside of this extent.
- * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers
- * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed
- * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`
- * method was used.
- * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be
- * visible.
- * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will
- * be visible.
- * @property {import("../render.js").OrderFunction} [renderOrder] Render order. Function to be used when sorting
- * features before rendering. By default features are drawn in the order that they are created. Use
- * `null` to avoid the sort, but get an undefined draw order.
- * @property {number} [renderBuffer=100] The buffer in pixels around the viewport extent used by the
- * renderer when getting features from the vector source for the rendering or hit-detection.
- * Recommended value: the size of the largest symbol, line width or label.
- * @property {import("./VectorRenderType.js").default|string} [renderMode='vector'] Render mode for vector layers:
- *  * `'image'`: Vector layers are rendered as images. Great performance, but point symbols and
- *    texts are always rotated with the view and pixels are scaled during zoom animations.
- *  * `'vector'`: Vector layers are rendered as vectors. Most accurate rendering even during
- *    animations, but slower performance.
- * @property {import("../source/Vector.js").default} [source] Source.
- * @property {import("../PluggableMap.js").default} [map] Sets the layer as overlay on a map. The map will not manage
- * this layer in its layers collection, and the layer will be rendered on top. This is useful for
- * temporary layers. The standard way to add a layer to a map and have it managed by the map is to
- * use {@link module:ol/Map#addLayer}.
- * @property {boolean} [declutter=false] Declutter images and text. Decluttering is applied to all
- * image and text styles, and the priority is defined by the z-index of the style. Lower z-index
- * means higher priority.
- * @property {import("../style/Style.js").StyleLike} [style] Layer style. See
- * {@link module:ol/style} for default style which will be used if this is not defined.
- * @property {boolean} [updateWhileAnimating=false] When set to `true` and `renderMode`
- * is `vector`, feature batches will be recreated during animations. This means that no
- * vectors will be shown clipped, but the setting will have a performance impact for large
- * amounts of vector data. When set to `false`, batches will be recreated when no animation
- * is active.
- * @property {boolean} [updateWhileInteracting=false] When set to `true` and `renderMode`
- * is `vector`, feature batches will be recreated during interactions. See also
- * `updateWhileAnimating`.
- */
-
-
-/**
- * @enum {string}
- * @private
- */
-var Vector_Property = {
-  RENDER_ORDER: 'renderOrder'
-};
-
-
-/**
- * @classdesc
- * Vector data that is rendered client-side.
- * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}
- * property on the layer object; for example, setting `title: 'My Title'` in the
- * options means that `title` is observable, and has get/set accessors.
- *
- * @api
- */
-var Vector_VectorLayer = /*@__PURE__*/(function (Layer) {
-  function VectorLayer(opt_options) {
-    var options = opt_options ?
-      opt_options : /** @type {Options} */ ({});
-
-    var baseOptions = Object(ol_obj["a" /* assign */])({}, options);
-
-    delete baseOptions.style;
-    delete baseOptions.renderBuffer;
-    delete baseOptions.updateWhileAnimating;
-    delete baseOptions.updateWhileInteracting;
-    Layer.call(this, baseOptions);
-
-    /**
-    * @private
-    * @type {boolean}
-    */
-    this.declutter_ = options.declutter !== undefined ? options.declutter : false;
-
-    /**
-    * @type {number}
-    * @private
-    */
-    this.renderBuffer_ = options.renderBuffer !== undefined ?
-      options.renderBuffer : 100;
-
-    /**
-    * User provided style.
-    * @type {import("../style/Style.js").StyleLike}
-    * @private
-    */
-    this.style_ = null;
-
-    /**
-    * Style function for use within the library.
-    * @type {import("../style/Style.js").StyleFunction|undefined}
-    * @private
-    */
-    this.styleFunction_ = undefined;
-
-    this.setStyle(options.style);
-
-    /**
-    * @type {boolean}
-    * @private
-    */
-    this.updateWhileAnimating_ = options.updateWhileAnimating !== undefined ?
-      options.updateWhileAnimating : false;
-
-    /**
-    * @type {boolean}
-    * @private
-    */
-    this.updateWhileInteracting_ = options.updateWhileInteracting !== undefined ?
-      options.updateWhileInteracting : false;
-
-    /**
-    * @private
-    * @type {import("./VectorTileRenderType.js").default|string}
-    */
-    this.renderMode_ = options.renderMode || VectorRenderType.VECTOR;
-
-    /**
-    * The layer type.
-    * @protected
-    * @type {import("../LayerType.js").default}
-    */
-    this.type = LayerType.VECTOR;
-
-  }
-
-  if ( Layer ) VectorLayer.__proto__ = Layer;
-  VectorLayer.prototype = Object.create( Layer && Layer.prototype );
-  VectorLayer.prototype.constructor = VectorLayer;
-
-  /**
-  * @return {boolean} Declutter.
-  */
-  VectorLayer.prototype.getDeclutter = function getDeclutter () {
-    return this.declutter_;
-  };
-
-  /**
-  * @param {boolean} declutter Declutter.
-  */
-  VectorLayer.prototype.setDeclutter = function setDeclutter (declutter) {
-    this.declutter_ = declutter;
-  };
-
-  /**
-  * @return {number|undefined} Render buffer.
-  */
-  VectorLayer.prototype.getRenderBuffer = function getRenderBuffer () {
-    return this.renderBuffer_;
-  };
-
-  /**
-  * @return {function(import("../Feature.js").default, import("../Feature.js").default): number|null|undefined} Render
-  *     order.
-  */
-  VectorLayer.prototype.getRenderOrder = function getRenderOrder () {
-    return (
-    /** @type {import("../render.js").OrderFunction|null|undefined} */ (this.get(Vector_Property.RENDER_ORDER))
-    );
-  };
-
-  /**
-  * Get the style for features.  This returns whatever was passed to the `style`
-  * option at construction or to the `setStyle` method.
-  * @return {import("../style/Style.js").StyleLike}
-  *     Layer style.
-  * @api
-  */
-  VectorLayer.prototype.getStyle = function getStyle () {
-    return this.style_;
-  };
-
-  /**
-  * Get the style function.
-  * @return {import("../style/Style.js").StyleFunction|undefined} Layer style function.
-  * @api
-  */
-  VectorLayer.prototype.getStyleFunction = function getStyleFunction () {
-    return this.styleFunction_;
-  };
-
-  /**
-  * @return {boolean} Whether the rendered layer should be updated while
-  *     animating.
-  */
-  VectorLayer.prototype.getUpdateWhileAnimating = function getUpdateWhileAnimating () {
-    return this.updateWhileAnimating_;
-  };
-
-  /**
-  * @return {boolean} Whether the rendered layer should be updated while
-  *     interacting.
-  */
-  VectorLayer.prototype.getUpdateWhileInteracting = function getUpdateWhileInteracting () {
-    return this.updateWhileInteracting_;
-  };
-
-  /**
-  * @param {import("../render.js").OrderFunction|null|undefined} renderOrder
-  *     Render order.
-  */
-  VectorLayer.prototype.setRenderOrder = function setRenderOrder (renderOrder) {
-    this.set(Vector_Property.RENDER_ORDER, renderOrder);
-  };
-
-  /**
-  * Set the style for features.  This can be a single style object, an array
-  * of styles, or a function that takes a feature and resolution and returns
-  * an array of styles. If it is `undefined` the default style is used. If
-  * it is `null` the layer has no style (a `null` style), so only features
-  * that have their own styles will be rendered in the layer. See
-  * {@link module:ol/style} for information on the default style.
-  * @param {import("../style/Style.js").default|Array<import("../style/Style.js").default>|import("../style/Style.js").StyleFunction|null|undefined} style Layer style.
-  * @api
-  */
-  VectorLayer.prototype.setStyle = function setStyle (style) {
-    this.style_ = style !== undefined ? style : createDefaultStyle;
-    this.styleFunction_ = style === null ?
-      undefined : toFunction(this.style_);
-    this.changed();
-  };
-
-  /**
-  * @return {import("./VectorRenderType.js").default|string} The render mode.
-  */
-  VectorLayer.prototype.getRenderMode = function getRenderMode () {
-    return this.renderMode_;
-  };
-
-  return VectorLayer;
-}(layer_Layer));
-
-
-/**
- * Return the associated {@link module:ol/source/Vector vectorsource} of the layer.
- * @function
- * @return {import("../source/Vector.js").default} Source.
- * @api
- */
-Vector_VectorLayer.prototype.getSource;
-
-
-/* harmony default export */ var Vector = (Vector_VectorLayer);
-
-//# sourceMappingURL=Vector.js.map
-// CONCATENATED MODULE: ./node_modules/ol/format/FormatType.js
-/**
- * @module ol/format/FormatType
- */
-
-/**
- * @enum {string}
- */
-/* harmony default export */ var FormatType = ({
-  ARRAY_BUFFER: 'arraybuffer',
-  JSON: 'json',
-  TEXT: 'text',
-  XML: 'xml'
-});
-
-//# sourceMappingURL=FormatType.js.map
-// CONCATENATED MODULE: ./node_modules/ol/featureloader.js
-/**
- * @module ol/featureloader
- */
-
-
-
-/**
- * {@link module:ol/source/Vector} sources use a function of this type to
- * load features.
- *
- * This function takes an {@link module:ol/extent~Extent} representing the area to be loaded,
- * a `{number}` representing the resolution (map units per pixel) and an
- * {@link module:ol/proj/Projection} for the projection  as
- * arguments. `this` within the function is bound to the
- * {@link module:ol/source/Vector} it's called from.
- *
- * The function is responsible for loading the features and adding them to the
- * source.
- * @typedef {function(this:(import("./source/Vector").default|import("./VectorTile.js").default), import("./extent.js").Extent, number,
- *                    import("./proj/Projection.js").default)} FeatureLoader
- * @api
- */
-
-
-/**
- * {@link module:ol/source/Vector} sources use a function of this type to
- * get the url to load features from.
- *
- * This function takes an {@link module:ol/extent~Extent} representing the area
- * to be loaded, a `{number}` representing the resolution (map units per pixel)
- * and an {@link module:ol/proj/Projection} for the projection  as
- * arguments and returns a `{string}` representing the URL.
- * @typedef {function(import("./extent.js").Extent, number, import("./proj/Projection.js").default): string} FeatureUrlFunction
- * @api
- */
-
-
-/**
- * @param {string|FeatureUrlFunction} url Feature URL service.
- * @param {import("./format/Feature.js").default} format Feature format.
- * @param {function(this:import("./VectorTile.js").default, Array<import("./Feature.js").default>, import("./proj/Projection.js").default, import("./extent.js").Extent)|function(this:import("./source/Vector").default, Array<import("./Feature.js").default>)} success
- *     Function called with the loaded features and optionally with the data
- *     projection. Called with the vector tile or source as `this`.
- * @param {function(this:import("./VectorTile.js").default)|function(this:import("./source/Vector").default)} failure
- *     Function called when loading failed. Called with the vector tile or
- *     source as `this`.
- * @return {FeatureLoader} The feature loader.
- */
-function loadFeaturesXhr(url, format, success, failure) {
-  return (
-    /**
-     * @param {import("./extent.js").Extent} extent Extent.
-     * @param {number} resolution Resolution.
-     * @param {import("./proj/Projection.js").default} projection Projection.
-     * @this {import("./source/Vector").default|import("./VectorTile.js").default}
-     */
-    function(extent, resolution, projection) {
-      var xhr = new XMLHttpRequest();
-      xhr.open('GET',
-        typeof url === 'function' ? url(extent, resolution, projection) : url,
-        true);
-      if (format.getType() == FormatType.ARRAY_BUFFER) {
-        xhr.responseType = 'arraybuffer';
-      }
-      /**
-       * @param {Event} event Event.
-       * @private
-       */
-      xhr.onload = function(event) {
-        // status will be 0 for file:// urls
-        if (!xhr.status || xhr.status >= 200 && xhr.status < 300) {
-          var type = format.getType();
-          /** @type {Document|Node|Object|string|undefined} */
-          var source;
-          if (type == FormatType.JSON || type == FormatType.TEXT) {
-            source = xhr.responseText;
-          } else if (type == FormatType.XML) {
-            source = xhr.responseXML;
-            if (!source) {
-              source = new DOMParser().parseFromString(xhr.responseText, 'application/xml');
-            }
-          } else if (type == FormatType.ARRAY_BUFFER) {
-            source = /** @type {ArrayBuffer} */ (xhr.response);
-          }
-          if (source) {
-            success.call(this, format.readFeatures(source,
-              {featureProjection: projection}),
-            format.readProjection(source), format.getLastExtent());
-          } else {
-            failure.call(this);
-          }
-        } else {
-          failure.call(this);
-        }
-      }.bind(this);
-      /**
-       * @private
-       */
-      xhr.onerror = function() {
-        failure.call(this);
-      }.bind(this);
-      xhr.send();
-    }
-  );
-}
-
-
-/**
- * Create an XHR feature loader for a `url` and `format`. The feature loader
- * loads features (with XHR), parses the features, and adds them to the
- * vector source.
- * @param {string|FeatureUrlFunction} url Feature URL service.
- * @param {import("./format/Feature.js").default} format Feature format.
- * @return {FeatureLoader} The feature loader.
- * @api
- */
-function featureloader_xhr(url, format) {
-  return loadFeaturesXhr(url, format,
-    /**
-     * @param {Array<import("./Feature.js").default>} features The loaded features.
-     * @param {import("./proj/Projection.js").default} dataProjection Data
-     * projection.
-     * @this {import("./source/Vector").default|import("./VectorTile.js").default}
-     */
-    function(features, dataProjection) {
-      var sourceOrTile = /** @type {?} */ (this);
-      if (typeof sourceOrTile.addFeatures === 'function') {
-        /** @type {import("./source/Vector").default} */ (sourceOrTile).addFeatures(features);
-      }
-    }, /* FIXME handle error */ functions["c" /* VOID */]);
-}
-
-//# sourceMappingURL=featureloader.js.map
-// CONCATENATED MODULE: ./node_modules/ol/source/VectorEventType.js
-/**
- * @module ol/source/VectorEventType
- */
-
-/**
- * @enum {string}
- */
-/* harmony default export */ var VectorEventType = ({
-  /**
-   * Triggered when a feature is added to the source.
-   * @event ol/source/Vector.VectorSourceEvent#addfeature
-   * @api
-   */
-  ADDFEATURE: 'addfeature',
-
-  /**
-   * Triggered when a feature is updated.
-   * @event ol/source/Vector.VectorSourceEvent#changefeature
-   * @api
-   */
-  CHANGEFEATURE: 'changefeature',
-
-  /**
-   * Triggered when the clear method is called on the source.
-   * @event ol/source/Vector.VectorSourceEvent#clear
-   * @api
-   */
-  CLEAR: 'clear',
-
-  /**
-   * Triggered when a feature is removed from the source.
-   * See {@link module:ol/source/Vector#clear source.clear()} for exceptions.
-   * @event ol/source/Vector.VectorSourceEvent#removefeature
-   * @api
-   */
-  REMOVEFEATURE: 'removefeature'
-});
-
-//# sourceMappingURL=VectorEventType.js.map
-// CONCATENATED MODULE: ./node_modules/ol/source/Vector.js
-/**
- * @module ol/source/Vector
- */
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-/**
- * A function that takes an {@link module:ol/extent~Extent} and a resolution as arguments, and
- * returns an array of {@link module:ol/extent~Extent} with the extents to load. Usually this
- * is one of the standard {@link module:ol/loadingstrategy} strategies.
- *
- * @typedef {function(import("../extent.js").Extent, number): Array<import("../extent.js").Extent>} LoadingStrategy
- * @api
- */
-
-
-/**
- * @classdesc
- * Events emitted by {@link module:ol/source/Vector} instances are instances of this
- * type.
- */
-var VectorSourceEvent = /*@__PURE__*/(function (Event) {
-  function VectorSourceEvent(type, opt_feature) {
-
-    Event.call(this, type);
-
-    /**
-     * The feature being added or removed.
-     * @type {import("../Feature.js").default|undefined}
-     * @api
-     */
-    this.feature = opt_feature;
-
-  }
-
-  if ( Event ) VectorSourceEvent.__proto__ = Event;
-  VectorSourceEvent.prototype = Object.create( Event && Event.prototype );
-  VectorSourceEvent.prototype.constructor = VectorSourceEvent;
-
-  return VectorSourceEvent;
-}(Event["a" /* default */]));
-
-
-/**
- * @typedef {Object} Options
- * @property {import("./Source.js").AttributionLike} [attributions] Attributions.
- * @property {Array<import("../Feature.js").default>|Collection<import("../Feature.js").default>} [features]
- * Features. If provided as {@link module:ol/Collection}, the features in the source
- * and the collection will stay in sync.
- * @property {import("../format/Feature.js").default} [format] The feature format used by the XHR
- * feature loader when `url` is set. Required if `url` is set, otherwise ignored.
- * @property {import("../featureloader.js").FeatureLoader} [loader]
- * The loader function used to load features, from a remote source for example.
- * If this is not set and `url` is set, the source will create and use an XHR
- * feature loader.
- *
- * Example:
- *
- * ```js
- * import {Vector} from 'ol/source';
- * import {GeoJSON} from 'ol/format';
- * import {bbox} from 'ol/loadingstrategy';
- *
- * var vectorSource = new Vector({
- *   format: new GeoJSON(),
- *   loader: function(extent, resolution, projection) {
- *      var proj = projection.getCode();
- *      var url = 'https://ahocevar.com/geoserver/wfs?service=WFS&' +
- *          'version=1.1.0&request=GetFeature&typename=osm:water_areas&' +
- *          'outputFormat=application/json&srsname=' + proj + '&' +
- *          'bbox=' + extent.join(',') + ',' + proj;
- *      var xhr = new XMLHttpRequest();
- *      xhr.open('GET', url);
- *      var onError = function() {
- *        vectorSource.removeLoadedExtent(extent);
- *      }
- *      xhr.onerror = onError;
- *      xhr.onload = function() {
- *        if (xhr.status == 200) {
- *          vectorSource.addFeatures(
- *              vectorSource.getFormat().readFeatures(xhr.responseText));
- *        } else {
- *          onError();
- *        }
- *      }
- *      xhr.send();
- *    },
- *    strategy: bbox
- *  });
- * ```
- * @property {boolean} [overlaps=true] This source may have overlapping geometries.
- * Setting this to `false` (e.g. for sources with polygons that represent administrative
- * boundaries or TopoJSON sources) allows the renderer to optimise fill and
- * stroke operations.
- * @property {LoadingStrategy} [strategy] The loading strategy to use.
- * By default an {@link module:ol/loadingstrategy~all}
- * strategy is used, a one-off strategy which loads all features at once.
- * @property {string|import("../featureloader.js").FeatureUrlFunction} [url]
- * Setting this option instructs the source to load features using an XHR loader
- * (see {@link module:ol/featureloader~xhr}). Use a `string` and an
- * {@link module:ol/loadingstrategy~all} for a one-off download of all features from
- * the given URL. Use a {@link module:ol/featureloader~FeatureUrlFunction} to generate the url with
- * other loading strategies.
- * Requires `format` to be set as well.
- * When default XHR feature loader is provided, the features will
- * be transformed from the data projection to the view projection
- * during parsing. If your remote data source does not advertise its projection
- * properly, this transformation will be incorrect. For some formats, the
- * default projection (usually EPSG:4326) can be overridden by setting the
- * dataProjection constructor option on the format.
- * Note that if a source contains non-feature data, such as a GeoJSON geometry
- * or a KML NetworkLink, these will be ignored. Use a custom loader to load these.
- * @property {boolean} [useSpatialIndex=true]
- * By default, an RTree is used as spatial index. When features are removed and
- * added frequently, and the total number of features is low, setting this to
- * `false` may improve performance.
- *
- * Note that
- * {@link module:ol/source/Vector~VectorSource#getFeaturesInExtent},
- * {@link module:ol/source/Vector~VectorSource#getClosestFeatureToCoordinate} and
- * {@link module:ol/source/Vector~VectorSource#getExtent} cannot be used when `useSpatialIndex` is
- * set to `false`, and {@link module:ol/source/Vector~VectorSource#forEachFeatureInExtent} will loop
- * through all features.
- *
- * When set to `false`, the features will be maintained in an
- * {@link module:ol/Collection}, which can be retrieved through
- * {@link module:ol/source/Vector~VectorSource#getFeaturesCollection}.
- * @property {boolean} [wrapX=true] Wrap the world horizontally. For vector editing across the
- * -180° and 180° meridians to work properly, this should be set to `false`. The
- * resulting geometry coordinates will then exceed the world bounds.
- */
-
-
-/**
- * @classdesc
- * Provides a source of features for vector layers. Vector features provided
- * by this source are suitable for editing. See {@link module:ol/source/VectorTile~VectorTile} for
- * vector data that is optimized for rendering.
- *
- * @fires ol/source/Vector.VectorSourceEvent
- * @api
- */
-var Vector_VectorSource = /*@__PURE__*/(function (Source) {
-  function VectorSource(opt_options) {
-
-    var options = opt_options || {};
-
-    Source.call(this, {
-      attributions: options.attributions,
-      projection: undefined,
-      state: State.READY,
-      wrapX: options.wrapX !== undefined ? options.wrapX : true
-    });
-
-    /**
-     * @private
-     * @type {import("../featureloader.js").FeatureLoader}
-     */
-    this.loader_ = functions["c" /* VOID */];
-
-    /**
-     * @private
-     * @type {import("../format/Feature.js").default|undefined}
-     */
-    this.format_ = options.format;
-
-    /**
-     * @private
-     * @type {boolean}
-     */
-    this.overlaps_ = options.overlaps == undefined ? true : options.overlaps;
-
-    /**
-     * @private
-     * @type {string|import("../featureloader.js").FeatureUrlFunction|undefined}
-     */
-    this.url_ = options.url;
-
-    if (options.loader !== undefined) {
-      this.loader_ = options.loader;
-    } else if (this.url_ !== undefined) {
-      assert(this.format_, 7); // `format` must be set when `url` is set
-      // create a XHR feature loader for "url" and "format"
-      this.loader_ = featureloader_xhr(this.url_, /** @type {import("../format/Feature.js").default} */ (this.format_));
-    }
-
-    /**
-     * @private
-     * @type {LoadingStrategy}
-     */
-    this.strategy_ = options.strategy !== undefined ? options.strategy : loadingstrategy_all;
-
-    var useSpatialIndex =
-        options.useSpatialIndex !== undefined ? options.useSpatialIndex : true;
-
-    /**
-     * @private
-     * @type {RBush<import("../Feature.js").default>}
-     */
-    this.featuresRtree_ = useSpatialIndex ? new structs_RBush() : null;
-
-    /**
-     * @private
-     * @type {RBush<{extent: import("../extent.js").Extent}>}
-     */
-    this.loadedExtentsRtree_ = new structs_RBush();
-
-    /**
-     * @private
-     * @type {!Object<string, import("../Feature.js").default>}
-     */
-    this.nullGeometryFeatures_ = {};
-
-    /**
-     * A lookup of features by id (the return from feature.getId()).
-     * @private
-     * @type {!Object<string, import("../Feature.js").default>}
-     */
-    this.idIndex_ = {};
-
-    /**
-     * A lookup of features without id (keyed by getUid(feature)).
-     * @private
-     * @type {!Object<string, import("../Feature.js").default>}
-     */
-    this.undefIdIndex_ = {};
-
-    /**
-     * @private
-     * @type {Object<string, Array<import("../events.js").EventsKey>>}
-     */
-    this.featureChangeKeys_ = {};
-
-    /**
-     * @private
-     * @type {Collection<import("../Feature.js").default>}
-     */
-    this.featuresCollection_ = null;
-
-    var collection, features;
-    if (Array.isArray(options.features)) {
-      features = options.features;
-    } else if (options.features) {
-      collection = options.features;
-      features = collection.getArray();
-    }
-    if (!useSpatialIndex && collection === undefined) {
-      collection = new ol_Collection(features);
-    }
-    if (features !== undefined) {
-      this.addFeaturesInternal(features);
-    }
-    if (collection !== undefined) {
-      this.bindFeaturesCollection_(collection);
-    }
-
-  }
-
-  if ( Source ) VectorSource.__proto__ = Source;
-  VectorSource.prototype = Object.create( Source && Source.prototype );
-  VectorSource.prototype.constructor = VectorSource;
-
-  /**
-   * Add a single feature to the source.  If you want to add a batch of features
-   * at once, call {@link module:ol/source/Vector~VectorSource#addFeatures #addFeatures()}
-   * instead. A feature will not be added to the source if feature with
-   * the same id is already there. The reason for this behavior is to avoid
-   * feature duplication when using bbox or tile loading strategies.
-   * @param {import("../Feature.js").default} feature Feature to add.
-   * @api
-   */
-  VectorSource.prototype.addFeature = function addFeature (feature) {
-    this.addFeatureInternal(feature);
-    this.changed();
-  };
-
-
-  /**
-   * Add a feature without firing a `change` event.
-   * @param {import("../Feature.js").default} feature Feature.
-   * @protected
-   */
-  VectorSource.prototype.addFeatureInternal = function addFeatureInternal (feature) {
-    var featureKey = Object(util["c" /* getUid */])(feature);
-
-    if (!this.addToIndex_(featureKey, feature)) {
-      return;
-    }
-
-    this.setupChangeEvents_(featureKey, feature);
-
-    var geometry = feature.getGeometry();
-    if (geometry) {
-      var extent = geometry.getExtent();
-      if (this.featuresRtree_) {
-        this.featuresRtree_.insert(extent, feature);
-      }
-    } else {
-      this.nullGeometryFeatures_[featureKey] = feature;
-    }
-
-    this.dispatchEvent(
-      new VectorSourceEvent(VectorEventType.ADDFEATURE, feature));
-  };
-
-
-  /**
-   * @param {string} featureKey Unique identifier for the feature.
-   * @param {import("../Feature.js").default} feature The feature.
-   * @private
-   */
-  VectorSource.prototype.setupChangeEvents_ = function setupChangeEvents_ (featureKey, feature) {
-    this.featureChangeKeys_[featureKey] = [
-      Object(ol_events["a" /* listen */])(feature, EventType["a" /* default */].CHANGE,
-        this.handleFeatureChange_, this),
-      Object(ol_events["a" /* listen */])(feature, ObjectEventType["a" /* default */].PROPERTYCHANGE,
-        this.handleFeatureChange_, this)
-    ];
-  };
-
-
-  /**
-   * @param {string} featureKey Unique identifier for the feature.
-   * @param {import("../Feature.js").default} feature The feature.
-   * @return {boolean} The feature is "valid", in the sense that it is also a
-   *     candidate for insertion into the Rtree.
-   * @private
-   */
-  VectorSource.prototype.addToIndex_ = function addToIndex_ (featureKey, feature) {
-    var valid = true;
-    var id = feature.getId();
-    if (id !== undefined) {
-      if (!(id.toString() in this.idIndex_)) {
-        this.idIndex_[id.toString()] = feature;
-      } else {
-        valid = false;
-      }
-    } else {
-      assert(!(featureKey in this.undefIdIndex_),
-        30); // The passed `feature` was already added to the source
-      this.undefIdIndex_[featureKey] = feature;
-    }
-    return valid;
-  };
-
-
-  /**
-   * Add a batch of features to the source.
-   * @param {Array<import("../Feature.js").default>} features Features to add.
-   * @api
-   */
-  VectorSource.prototype.addFeatures = function addFeatures (features) {
-    this.addFeaturesInternal(features);
-    this.changed();
-  };
-
-
-  /**
-   * Add features without firing a `change` event.
-   * @param {Array<import("../Feature.js").default>} features Features.
-   * @protected
-   */
-  VectorSource.prototype.addFeaturesInternal = function addFeaturesInternal (features) {
-    var extents = [];
-    var newFeatures = [];
-    var geometryFeatures = [];
-
-    for (var i = 0, length = features.length; i < length; i++) {
-      var feature = features[i];
-      var featureKey = Object(util["c" /* getUid */])(feature);
-      if (this.addToIndex_(featureKey, feature)) {
-        newFeatures.push(feature);
-      }
-    }
-
-    for (var i$1 = 0, length$1 = newFeatures.length; i$1 < length$1; i$1++) {
-      var feature$1 = newFeatures[i$1];
-      var featureKey$1 = Object(util["c" /* getUid */])(feature$1);
-      this.setupChangeEvents_(featureKey$1, feature$1);
-
-      var geometry = feature$1.getGeometry();
-      if (geometry) {
-        var extent = geometry.getExtent();
-        extents.push(extent);
-        geometryFeatures.push(feature$1);
-      } else {
-        this.nullGeometryFeatures_[featureKey$1] = feature$1;
-      }
-    }
-    if (this.featuresRtree_) {
-      this.featuresRtree_.load(extents, geometryFeatures);
-    }
-
-    for (var i$2 = 0, length$2 = newFeatures.length; i$2 < length$2; i$2++) {
-      this.dispatchEvent(new VectorSourceEvent(VectorEventType.ADDFEATURE, newFeatures[i$2]));
-    }
-  };
-
-
-  /**
-   * @param {!Collection<import("../Feature.js").default>} collection Collection.
-   * @private
-   */
-  VectorSource.prototype.bindFeaturesCollection_ = function bindFeaturesCollection_ (collection) {
-    var modifyingCollection = false;
-    Object(ol_events["a" /* listen */])(this, VectorEventType.ADDFEATURE,
-      /**
-       * @param {VectorSourceEvent} evt The vector source event
-       */
-      function(evt) {
-        if (!modifyingCollection) {
-          modifyingCollection = true;
-          collection.push(evt.feature);
-          modifyingCollection = false;
-        }
-      });
-    Object(ol_events["a" /* listen */])(this, VectorEventType.REMOVEFEATURE,
-      /**
-       * @param {VectorSourceEvent} evt The vector source event
-       */
-      function(evt) {
-        if (!modifyingCollection) {
-          modifyingCollection = true;
-          collection.remove(evt.feature);
-          modifyingCollection = false;
-        }
-      });
-    Object(ol_events["a" /* listen */])(collection, CollectionEventType.ADD,
-      /**
-       * @param {import("../Collection.js").CollectionEvent} evt The collection event
-       */
-      function(evt) {
-        if (!modifyingCollection) {
-          modifyingCollection = true;
-          this.addFeature(/** @type {import("../Feature.js").default} */ (evt.element));
-          modifyingCollection = false;
-        }
-      }, this);
-    Object(ol_events["a" /* listen */])(collection, CollectionEventType.REMOVE,
-      /**
-       * @param {import("../Collection.js").CollectionEvent} evt The collection event
-       */
-      function(evt) {
-        if (!modifyingCollection) {
-          modifyingCollection = true;
-          this.removeFeature(/** @type {import("../Feature.js").default} */ (evt.element));
-          modifyingCollection = false;
-        }
-      }, this);
-    this.featuresCollection_ = collection;
-  };
-
-
-  /**
-   * Remove all features from the source.
-   * @param {boolean=} opt_fast Skip dispatching of {@link module:ol/source/Vector.VectorSourceEvent#removefeature} events.
-   * @api
-   */
-  VectorSource.prototype.clear = function clear (opt_fast) {
-    if (opt_fast) {
-      for (var featureId in this.featureChangeKeys_) {
-        var keys = this.featureChangeKeys_[featureId];
-        keys.forEach(ol_events["e" /* unlistenByKey */]);
-      }
-      if (!this.featuresCollection_) {
-        this.featureChangeKeys_ = {};
-        this.idIndex_ = {};
-        this.undefIdIndex_ = {};
-      }
-    } else {
-      if (this.featuresRtree_) {
-        this.featuresRtree_.forEach(this.removeFeatureInternal, this);
-        for (var id in this.nullGeometryFeatures_) {
-          this.removeFeatureInternal(this.nullGeometryFeatures_[id]);
-        }
-      }
-    }
-    if (this.featuresCollection_) {
-      this.featuresCollection_.clear();
-    }
-
-    if (this.featuresRtree_) {
-      this.featuresRtree_.clear();
-    }
-    this.loadedExtentsRtree_.clear();
-    this.nullGeometryFeatures_ = {};
-
-    var clearEvent = new VectorSourceEvent(VectorEventType.CLEAR);
-    this.dispatchEvent(clearEvent);
-    this.changed();
-  };
-
-
-  /**
-   * Iterate through all features on the source, calling the provided callback
-   * with each one.  If the callback returns any "truthy" value, iteration will
-   * stop and the function will return the same value.
-   * Note: this function only iterate through the feature that have a defined geometry.
-   *
-   * @param {function(import("../Feature.js").default): T} callback Called with each feature
-   *     on the source.  Return a truthy value to stop iteration.
-   * @return {T|undefined} The return value from the last call to the callback.
-   * @template T
-   * @api
-   */
-  VectorSource.prototype.forEachFeature = function forEachFeature (callback) {
-    if (this.featuresRtree_) {
-      return this.featuresRtree_.forEach(callback);
-    } else if (this.featuresCollection_) {
-      this.featuresCollection_.forEach(callback);
-    }
-  };
-
-
-  /**
-   * Iterate through all features whose geometries contain the provided
-   * coordinate, calling the callback with each feature.  If the callback returns
-   * a "truthy" value, iteration will stop and the function will return the same
-   * value.
-   *
-   * @param {import("../coordinate.js").Coordinate} coordinate Coordinate.
-   * @param {function(import("../Feature.js").default): T} callback Called with each feature
-   *     whose goemetry contains the provided coordinate.
-   * @return {T|undefined} The return value from the last call to the callback.
-   * @template T
-   */
-  VectorSource.prototype.forEachFeatureAtCoordinateDirect = function forEachFeatureAtCoordinateDirect (coordinate, callback) {
-    var extent = [coordinate[0], coordinate[1], coordinate[0], coordinate[1]];
-    return this.forEachFeatureInExtent(extent, function(feature) {
-      var geometry = feature.getGeometry();
-      if (geometry.intersectsCoordinate(coordinate)) {
-        return callback(feature);
-      } else {
-        return undefined;
-      }
-    });
-  };
-
-
-  /**
-   * Iterate through all features whose bounding box intersects the provided
-   * extent (note that the feature's geometry may not intersect the extent),
-   * calling the callback with each feature.  If the callback returns a "truthy"
-   * value, iteration will stop and the function will return the same value.
-   *
-   * If you are interested in features whose geometry intersects an extent, call
-   * the {@link module:ol/source/Vector~VectorSource#forEachFeatureIntersectingExtent #forEachFeatureIntersectingExtent()} method instead.
-   *
-   * When `useSpatialIndex` is set to false, this method will loop through all
-   * features, equivalent to {@link module:ol/source/Vector~VectorSource#forEachFeature #forEachFeature()}.
-   *
-   * @param {import("../extent.js").Extent} extent Extent.
-   * @param {function(import("../Feature.js").default): T} callback Called with each feature
-   *     whose bounding box intersects the provided extent.
-   * @return {T|undefined} The return value from the last call to the callback.
-   * @template T
-   * @api
-   */
-  VectorSource.prototype.forEachFeatureInExtent = function forEachFeatureInExtent (extent, callback) {
-    if (this.featuresRtree_) {
-      return this.featuresRtree_.forEachInExtent(extent, callback);
-    } else if (this.featuresCollection_) {
-      this.featuresCollection_.forEach(callback);
-    }
-  };
-
-
-  /**
-   * Iterate through all features whose geometry intersects the provided extent,
-   * calling the callback with each feature.  If the callback returns a "truthy"
-   * value, iteration will stop and the function will return the same value.
-   *
-   * If you only want to test for bounding box intersection, call the
-   * {@link module:ol/source/Vector~VectorSource#forEachFeatureInExtent #forEachFeatureInExtent()} method instead.
-   *
-   * @param {import("../extent.js").Extent} extent Extent.
-   * @param {function(import("../Feature.js").default): T} callback Called with each feature
-   *     whose geometry intersects the provided extent.
-   * @return {T|undefined} The return value from the last call to the callback.
-   * @template T
-   * @api
-   */
-  VectorSource.prototype.forEachFeatureIntersectingExtent = function forEachFeatureIntersectingExtent (extent, callback) {
-    return this.forEachFeatureInExtent(extent,
-      /**
-       * @param {import("../Feature.js").default} feature Feature.
-       * @return {T|undefined} The return value from the last call to the callback.
-       */
-      function(feature) {
-        var geometry = feature.getGeometry();
-        if (geometry.intersectsExtent(extent)) {
-          var result = callback(feature);
-          if (result) {
-            return result;
-          }
-        }
-      });
-  };
-
-
-  /**
-   * Get the features collection associated with this source. Will be `null`
-   * unless the source was configured with `useSpatialIndex` set to `false`, or
-   * with an {@link module:ol/Collection} as `features`.
-   * @return {Collection<import("../Feature.js").default>} The collection of features.
-   * @api
-   */
-  VectorSource.prototype.getFeaturesCollection = function getFeaturesCollection () {
-    return this.featuresCollection_;
-  };
-
-
-  /**
-   * Get all features on the source in random order.
-   * @return {Array<import("../Feature.js").default>} Features.
-   * @api
-   */
-  VectorSource.prototype.getFeatures = function getFeatures () {
-    var features;
-    if (this.featuresCollection_) {
-      features = this.featuresCollection_.getArray();
-    } else if (this.featuresRtree_) {
-      features = this.featuresRtree_.getAll();
-      if (!Object(ol_obj["d" /* isEmpty */])(this.nullGeometryFeatures_)) {
-        extend(features, Object(ol_obj["c" /* getValues */])(this.nullGeometryFeatures_));
-      }
-    }
-    return (
-      /** @type {Array<import("../Feature.js").default>} */ (features)
-    );
-  };
-
-
-  /**
-   * Get all features whose geometry intersects the provided coordinate.
-   * @param {import("../coordinate.js").Coordinate} coordinate Coordinate.
-   * @return {Array<import("../Feature.js").default>} Features.
-   * @api
-   */
-  VectorSource.prototype.getFeaturesAtCoordinate = function getFeaturesAtCoordinate (coordinate) {
-    var features = [];
-    this.forEachFeatureAtCoordinateDirect(coordinate, function(feature) {
-      features.push(feature);
-    });
-    return features;
-  };
-
-
-  /**
-   * Get all features in the provided extent.  Note that this returns an array of
-   * all features intersecting the given extent in random order (so it may include
-   * features whose geometries do not intersect the extent).
-   *
-   * This method is not available when the source is configured with
-   * `useSpatialIndex` set to `false`.
-   * @param {import("../extent.js").Extent} extent Extent.
-   * @return {Array<import("../Feature.js").default>} Features.
-   * @api
-   */
-  VectorSource.prototype.getFeaturesInExtent = function getFeaturesInExtent (extent) {
-    return this.featuresRtree_.getInExtent(extent);
-  };
-
-
-  /**
-   * Get the closest feature to the provided coordinate.
-   *
-   * This method is not available when the source is configured with
-   * `useSpatialIndex` set to `false`.
-   * @param {import("../coordinate.js").Coordinate} coordinate Coordinate.
-   * @param {function(import("../Feature.js").default):boolean=} opt_filter Feature filter function.
-   *     The filter function will receive one argument, the {@link module:ol/Feature feature}
-   *     and it should return a boolean value. By default, no filtering is made.
-   * @return {import("../Feature.js").default} Closest feature.
-   * @api
-   */
-  VectorSource.prototype.getClosestFeatureToCoordinate = function getClosestFeatureToCoordinate (coordinate, opt_filter) {
-    // Find the closest feature using branch and bound.  We start searching an
-    // infinite extent, and find the distance from the first feature found.  This
-    // becomes the closest feature.  We then compute a smaller extent which any
-    // closer feature must intersect.  We continue searching with this smaller
-    // extent, trying to find a closer feature.  Every time we find a closer
-    // feature, we update the extent being searched so that any even closer
-    // feature must intersect it.  We continue until we run out of features.
-    var x = coordinate[0];
-    var y = coordinate[1];
-    var closestFeature = null;
-    var closestPoint = [NaN, NaN];
-    var minSquaredDistance = Infinity;
-    var extent = [-Infinity, -Infinity, Infinity, Infinity];
-    var filter = opt_filter ? opt_filter : functions["b" /* TRUE */];
-    this.featuresRtree_.forEachInExtent(extent,
-      /**
-       * @param {import("../Feature.js").default} feature Feature.
-       */
-      function(feature) {
-        if (filter(feature)) {
-          var geometry = feature.getGeometry();
-          var previousMinSquaredDistance = minSquaredDistance;
-          minSquaredDistance = geometry.closestPointXY(
-            x, y, closestPoint, minSquaredDistance);
-          if (minSquaredDistance < previousMinSquaredDistance) {
-            closestFeature = feature;
-            // This is sneaky.  Reduce the extent that it is currently being
-            // searched while the R-Tree traversal using this same extent object
-            // is still in progress.  This is safe because the new extent is
-            // strictly contained by the old extent.
-            var minDistance = Math.sqrt(minSquaredDistance);
-            extent[0] = x - minDistance;
-            extent[1] = y - minDistance;
-            extent[2] = x + minDistance;
-            extent[3] = y + minDistance;
-          }
-        }
-      });
-    return closestFeature;
-  };
-
-
-  /**
-   * Get the extent of the features currently in the source.
-   *
-   * This method is not available when the source is configured with
-   * `useSpatialIndex` set to `false`.
-   * @param {import("../extent.js").Extent=} opt_extent Destination extent. If provided, no new extent
-   *     will be created. Instead, that extent's coordinates will be overwritten.
-   * @return {import("../extent.js").Extent} Extent.
-   * @api
-   */
-  VectorSource.prototype.getExtent = function getExtent (opt_extent) {
-    return this.featuresRtree_.getExtent(opt_extent);
-  };
-
-
-  /**
-   * Get a feature by its identifier (the value returned by feature.getId()).
-   * Note that the index treats string and numeric identifiers as the same.  So
-   * `source.getFeatureById(2)` will return a feature with id `'2'` or `2`.
-   *
-   * @param {string|number} id Feature identifier.
-   * @return {import("../Feature.js").default} The feature (or `null` if not found).
-   * @api
-   */
-  VectorSource.prototype.getFeatureById = function getFeatureById (id) {
-    var feature = this.idIndex_[id.toString()];
-    return feature !== undefined ? feature : null;
-  };
-
-
-  /**
-   * Get the format associated with this source.
-   *
-   * @return {import("../format/Feature.js").default|undefined} The feature format.
-   * @api
-   */
-  VectorSource.prototype.getFormat = function getFormat () {
-    return this.format_;
-  };
-
-
-  /**
-   * @return {boolean} The source can have overlapping geometries.
-   */
-  VectorSource.prototype.getOverlaps = function getOverlaps () {
-    return this.overlaps_;
-  };
-
-
-  /**
-   * Get the url associated with this source.
-   *
-   * @return {string|import("../featureloader.js").FeatureUrlFunction|undefined} The url.
-   * @api
-   */
-  VectorSource.prototype.getUrl = function getUrl () {
-    return this.url_;
-  };
-
-
-  /**
-   * @param {Event} event Event.
-   * @private
-   */
-  VectorSource.prototype.handleFeatureChange_ = function handleFeatureChange_ (event) {
-    var feature = /** @type {import("../Feature.js").default} */ (event.target);
-    var featureKey = Object(util["c" /* getUid */])(feature);
-    var geometry = feature.getGeometry();
-    if (!geometry) {
-      if (!(featureKey in this.nullGeometryFeatures_)) {
-        if (this.featuresRtree_) {
-          this.featuresRtree_.remove(feature);
-        }
-        this.nullGeometryFeatures_[featureKey] = feature;
-      }
-    } else {
-      var extent = geometry.getExtent();
-      if (featureKey in this.nullGeometryFeatures_) {
-        delete this.nullGeometryFeatures_[featureKey];
-        if (this.featuresRtree_) {
-          this.featuresRtree_.insert(extent, feature);
-        }
-      } else {
-        if (this.featuresRtree_) {
-          this.featuresRtree_.update(extent, feature);
-        }
-      }
-    }
-    var id = feature.getId();
-    if (id !== undefined) {
-      var sid = id.toString();
-      if (featureKey in this.undefIdIndex_) {
-        delete this.undefIdIndex_[featureKey];
-        this.idIndex_[sid] = feature;
-      } else {
-        if (this.idIndex_[sid] !== feature) {
-          this.removeFromIdIndex_(feature);
-          this.idIndex_[sid] = feature;
-        }
-      }
-    } else {
-      if (!(featureKey in this.undefIdIndex_)) {
-        this.removeFromIdIndex_(feature);
-        this.undefIdIndex_[featureKey] = feature;
-      }
-    }
-    this.changed();
-    this.dispatchEvent(new VectorSourceEvent(
-      VectorEventType.CHANGEFEATURE, feature));
-  };
-
-  /**
-   * Returns true if the feature is contained within the source.
-   * @param {import("../Feature.js").default} feature Feature.
-   * @return {boolean} Has feature.
-   * @api
-   */
-  VectorSource.prototype.hasFeature = function hasFeature (feature) {
-    var id = feature.getId();
-    if (id !== undefined) {
-      return id in this.idIndex_;
-    } else {
-      return Object(util["c" /* getUid */])(feature) in this.undefIdIndex_;
-    }
-  };
-
-  /**
-   * @return {boolean} Is empty.
-   */
-  VectorSource.prototype.isEmpty = function isEmpty$1 () {
-    return this.featuresRtree_.isEmpty() && Object(ol_obj["d" /* isEmpty */])(this.nullGeometryFeatures_);
-  };
-
-
-  /**
-   * @param {import("../extent.js").Extent} extent Extent.
-   * @param {number} resolution Resolution.
-   * @param {import("../proj/Projection.js").default} projection Projection.
-   */
-  VectorSource.prototype.loadFeatures = function loadFeatures (extent, resolution, projection) {
-    var this$1 = this;
-
-    var loadedExtentsRtree = this.loadedExtentsRtree_;
-    var extentsToLoad = this.strategy_(extent, resolution);
-    this.loading = false;
-    var loop = function ( i, ii ) {
-      var extentToLoad = extentsToLoad[i];
-      var alreadyLoaded = loadedExtentsRtree.forEachInExtent(extentToLoad,
-        /**
-         * @param {{extent: import("../extent.js").Extent}} object Object.
-         * @return {boolean} Contains.
-         */
-        function(object) {
-          return containsExtent(object.extent, extentToLoad);
-        });
-      if (!alreadyLoaded) {
-        this$1.loader_.call(this$1, extentToLoad, resolution, projection);
-        loadedExtentsRtree.insert(extentToLoad, {extent: extentToLoad.slice()});
-        this$1.loading = this$1.loader_ !== functions["c" /* VOID */];
-      }
-    };
-
-    for (var i = 0, ii = extentsToLoad.length; i < ii; ++i) loop( i, ii );
-  };
-
-
-  /**
-   * Remove an extent from the list of loaded extents.
-   * @param {import("../extent.js").Extent} extent Extent.
-   * @api
-   */
-  VectorSource.prototype.removeLoadedExtent = function removeLoadedExtent (extent) {
-    var loadedExtentsRtree = this.loadedExtentsRtree_;
-    var obj;
-    loadedExtentsRtree.forEachInExtent(extent, function(object) {
-      if (extent_equals(object.extent, extent)) {
-        obj = object;
-        return true;
-      }
-    });
-    if (obj) {
-      loadedExtentsRtree.remove(obj);
-    }
-  };
-
-
-  /**
-   * Remove a single feature from the source.  If you want to remove all features
-   * at once, use the {@link module:ol/source/Vector~VectorSource#clear #clear()} method
-   * instead.
-   * @param {import("../Feature.js").default} feature Feature to remove.
-   * @api
-   */
-  VectorSource.prototype.removeFeature = function removeFeature (feature) {
-    var featureKey = Object(util["c" /* getUid */])(feature);
-    if (featureKey in this.nullGeometryFeatures_) {
-      delete this.nullGeometryFeatures_[featureKey];
-    } else {
-      if (this.featuresRtree_) {
-        this.featuresRtree_.remove(feature);
-      }
-    }
-    this.removeFeatureInternal(feature);
-    this.changed();
-  };
-
-
-  /**
-   * Remove feature without firing a `change` event.
-   * @param {import("../Feature.js").default} feature Feature.
-   * @protected
-   */
-  VectorSource.prototype.removeFeatureInternal = function removeFeatureInternal (feature) {
-    var featureKey = Object(util["c" /* getUid */])(feature);
-    this.featureChangeKeys_[featureKey].forEach(ol_events["e" /* unlistenByKey */]);
-    delete this.featureChangeKeys_[featureKey];
-    var id = feature.getId();
-    if (id !== undefined) {
-      delete this.idIndex_[id.toString()];
-    } else {
-      delete this.undefIdIndex_[featureKey];
-    }
-    this.dispatchEvent(new VectorSourceEvent(
-      VectorEventType.REMOVEFEATURE, feature));
-  };
-
-
-  /**
-   * Remove a feature from the id index.  Called internally when the feature id
-   * may have changed.
-   * @param {import("../Feature.js").default} feature The feature.
-   * @return {boolean} Removed the feature from the index.
-   * @private
-   */
-  VectorSource.prototype.removeFromIdIndex_ = function removeFromIdIndex_ (feature) {
-    var removed = false;
-    for (var id in this.idIndex_) {
-      if (this.idIndex_[id] === feature) {
-        delete this.idIndex_[id];
-        removed = true;
-        break;
-      }
-    }
-    return removed;
-  };
-
-
-  /**
-   * Set the new loader of the source. The next loadFeatures call will use the
-   * new loader.
-   * @param {import("../featureloader.js").FeatureLoader} loader The loader to set.
-   * @api
-   */
-  VectorSource.prototype.setLoader = function setLoader (loader) {
-    this.loader_ = loader;
-  };
-
-  return VectorSource;
-}(source_Source));
-
-
-/* harmony default export */ var source_Vector = (Vector_VectorSource);
-
-//# sourceMappingURL=Vector.js.map
-// CONCATENATED MODULE: ./node_modules/ol/Feature.js
-/**
- * @module ol/Feature
- */
-
-
-
-
-
-/**
- * @typedef {typeof Feature|typeof import("./render/Feature.js").default} FeatureClass
- */
-
-/**
- * @typedef {Feature|import("./render/Feature.js").default} FeatureLike
- */
-
-/**
- * @classdesc
- * A vector object for geographic features with a geometry and other
- * attribute properties, similar to the features in vector file formats like
- * GeoJSON.
- *
- * Features can be styled individually with `setStyle`; otherwise they use the
- * style of their vector layer.
- *
- * Note that attribute properties are set as {@link module:ol/Object} properties on
- * the feature object, so they are observable, and have get/set accessors.
- *
- * Typically, a feature has a single geometry property. You can set the
- * geometry using the `setGeometry` method and get it with `getGeometry`.
- * It is possible to store more than one geometry on a feature using attribute
- * properties. By default, the geometry used for rendering is identified by
- * the property name `geometry`. If you want to use another geometry property
- * for rendering, use the `setGeometryName` method to change the attribute
- * property associated with the geometry for the feature.  For example:
- *
- * ```js
- *
- * import Feature from 'ol/Feature';
- * import Polygon from 'ol/geom/Polygon';
- * import Point from 'ol/geom/Point';
- *
- * var feature = new Feature({
- *   geometry: new Polygon(polyCoords),
- *   labelPoint: new Point(labelCoords),
- *   name: 'My Polygon'
- * });
- *
- * // get the polygon geometry
- * var poly = feature.getGeometry();
- *
- * // Render the feature as a point using the coordinates from labelPoint
- * feature.setGeometryName('labelPoint');
- *
- * // get the point geometry
- * var point = feature.getGeometry();
- * ```
- *
- * @api
- */
-var Feature_Feature = /*@__PURE__*/(function (BaseObject) {
-  function Feature(opt_geometryOrProperties) {
-
-    BaseObject.call(this);
-
-    /**
-     * @private
-     * @type {number|string|undefined}
-     */
-    this.id_ = undefined;
-
-    /**
-     * @type {string}
-     * @private
-     */
-    this.geometryName_ = 'geometry';
-
-    /**
-     * User provided style.
-     * @private
-     * @type {import("./style/Style.js").StyleLike}
-     */
-    this.style_ = null;
-
-    /**
-     * @private
-     * @type {import("./style/Style.js").StyleFunction|undefined}
-     */
-    this.styleFunction_ = undefined;
-
-    /**
-     * @private
-     * @type {?import("./events.js").EventsKey}
-     */
-    this.geometryChangeKey_ = null;
-
-    Object(ol_events["a" /* listen */])(
-      this, Object(ol_Object["b" /* getChangeEventType */])(this.geometryName_),
-      this.handleGeometryChanged_, this);
-
-    if (opt_geometryOrProperties) {
-      if (typeof /** @type {?} */ (opt_geometryOrProperties).getSimplifiedGeometry === 'function') {
-        var geometry = /** @type {import("./geom/Geometry.js").default} */ (opt_geometryOrProperties);
-        this.setGeometry(geometry);
-      } else {
-        /** @type {Object<string, *>} */
-        var properties = opt_geometryOrProperties;
-        this.setProperties(properties);
-      }
-    }
-  }
-
-  if ( BaseObject ) Feature.__proto__ = BaseObject;
-  Feature.prototype = Object.create( BaseObject && BaseObject.prototype );
-  Feature.prototype.constructor = Feature;
-
-  /**
-   * Clone this feature. If the original feature has a geometry it
-   * is also cloned. The feature id is not set in the clone.
-   * @return {Feature} The clone.
-   * @api
-   */
-  Feature.prototype.clone = function clone () {
-    var clone = new Feature(this.getProperties());
-    clone.setGeometryName(this.getGeometryName());
-    var geometry = this.getGeometry();
-    if (geometry) {
-      clone.setGeometry(geometry.clone());
-    }
-    var style = this.getStyle();
-    if (style) {
-      clone.setStyle(style);
-    }
-    return clone;
-  };
-
-  /**
-   * Get the feature's default geometry.  A feature may have any number of named
-   * geometries.  The "default" geometry (the one that is rendered by default) is
-   * set when calling {@link module:ol/Feature~Feature#setGeometry}.
-   * @return {import("./geom/Geometry.js").default|undefined} The default geometry for the feature.
-   * @api
-   * @observable
-   */
-  Feature.prototype.getGeometry = function getGeometry () {
-    return (
-      /** @type {import("./geom/Geometry.js").default|undefined} */ (this.get(this.geometryName_))
-    );
-  };
-
-  /**
-   * Get the feature identifier.  This is a stable identifier for the feature and
-   * is either set when reading data from a remote source or set explicitly by
-   * calling {@link module:ol/Feature~Feature#setId}.
-   * @return {number|string|undefined} Id.
-   * @api
-   */
-  Feature.prototype.getId = function getId () {
-    return this.id_;
-  };
-
-  /**
-   * Get the name of the feature's default geometry.  By default, the default
-   * geometry is named `geometry`.
-   * @return {string} Get the property name associated with the default geometry
-   *     for this feature.
-   * @api
-   */
-  Feature.prototype.getGeometryName = function getGeometryName () {
-    return this.geometryName_;
-  };
-
-  /**
-   * Get the feature's style. Will return what was provided to the
-   * {@link module:ol/Feature~Feature#setStyle} method.
-   * @return {import("./style/Style.js").StyleLike} The feature style.
-   * @api
-   */
-  Feature.prototype.getStyle = function getStyle () {
-    return this.style_;
-  };
-
-  /**
-   * Get the feature's style function.
-   * @return {import("./style/Style.js").StyleFunction|undefined} Return a function
-   * representing the current style of this feature.
-   * @api
-   */
-  Feature.prototype.getStyleFunction = function getStyleFunction () {
-    return this.styleFunction_;
-  };
-
-  /**
-   * @private
-   */
-  Feature.prototype.handleGeometryChange_ = function handleGeometryChange_ () {
-    this.changed();
-  };
-
-  /**
-   * @private
-   */
-  Feature.prototype.handleGeometryChanged_ = function handleGeometryChanged_ () {
-    if (this.geometryChangeKey_) {
-      Object(ol_events["e" /* unlistenByKey */])(this.geometryChangeKey_);
-      this.geometryChangeKey_ = null;
-    }
-    var geometry = this.getGeometry();
-    if (geometry) {
-      this.geometryChangeKey_ = Object(ol_events["a" /* listen */])(geometry,
-        EventType["a" /* default */].CHANGE, this.handleGeometryChange_, this);
-    }
-    this.changed();
-  };
-
-  /**
-   * Set the default geometry for the feature.  This will update the property
-   * with the name returned by {@link module:ol/Feature~Feature#getGeometryName}.
-   * @param {import("./geom/Geometry.js").default|undefined} geometry The new geometry.
-   * @api
-   * @observable
-   */
-  Feature.prototype.setGeometry = function setGeometry (geometry) {
-    this.set(this.geometryName_, geometry);
-  };
-
-  /**
-   * Set the style for the feature.  This can be a single style object, an array
-   * of styles, or a function that takes a resolution and returns an array of
-   * styles. If it is `null` the feature has no style (a `null` style).
-   * @param {import("./style/Style.js").StyleLike} style Style for this feature.
-   * @api
-   * @fires module:ol/events/Event~Event#event:change
-   */
-  Feature.prototype.setStyle = function setStyle (style) {
-    this.style_ = style;
-    this.styleFunction_ = !style ? undefined : createStyleFunction(style);
-    this.changed();
-  };
-
-  /**
-   * Set the feature id.  The feature id is considered stable and may be used when
-   * requesting features or comparing identifiers returned from a remote source.
-   * The feature id can be used with the
-   * {@link module:ol/source/Vector~VectorSource#getFeatureById} method.
-   * @param {number|string|undefined} id The feature id.
-   * @api
-   * @fires module:ol/events/Event~Event#event:change
-   */
-  Feature.prototype.setId = function setId (id) {
-    this.id_ = id;
-    this.changed();
-  };
-
-  /**
-   * Set the property name to be used when getting the feature's default geometry.
-   * When calling {@link module:ol/Feature~Feature#getGeometry}, the value of the property with
-   * this name will be returned.
-   * @param {string} name The property name of the default geometry.
-   * @api
-   */
-  Feature.prototype.setGeometryName = function setGeometryName (name) {
-    Object(ol_events["c" /* unlisten */])(
-      this, Object(ol_Object["b" /* getChangeEventType */])(this.geometryName_),
-      this.handleGeometryChanged_, this);
-    this.geometryName_ = name;
-    Object(ol_events["a" /* listen */])(
-      this, Object(ol_Object["b" /* getChangeEventType */])(this.geometryName_),
-      this.handleGeometryChanged_, this);
-    this.handleGeometryChanged_();
-  };
-
-  return Feature;
-}(ol_Object["a" /* default */]));
-
-
-/**
- * Convert the provided object into a feature style function.  Functions passed
- * through unchanged.  Arrays of Style or single style objects wrapped
- * in a new feature style function.
- * @param {!import("./style/Style.js").StyleFunction|!Array<import("./style/Style.js").default>|!import("./style/Style.js").default} obj
- *     A feature style function, a single style, or an array of styles.
- * @return {import("./style/Style.js").StyleFunction} A style function.
- */
-function createStyleFunction(obj) {
-  if (typeof obj === 'function') {
-    return obj;
-  } else {
-    /**
-     * @type {Array<import("./style/Style.js").default>}
-     */
-    var styles;
-    if (Array.isArray(obj)) {
-      styles = obj;
-    } else {
-      assert(typeof /** @type {?} */ (obj).getZIndex === 'function',
-        41); // Expected an `import("./style/Style.js").Style` or an array of `import("./style/Style.js").Style`
-      var style = /** @type {import("./style/Style.js").default} */ (obj);
-      styles = [style];
-    }
-    return function() {
-      return styles;
-    };
-  }
-}
-/* harmony default export */ var ol_Feature = (Feature_Feature);
-
-//# sourceMappingURL=Feature.js.map
 // CONCATENATED MODULE: ./node_modules/ol/format/Feature.js
 /**
  * @module ol/format/Feature
@@ -46490,432 +50400,6 @@ var XMLFeature_XMLFeature = /*@__PURE__*/(function (FeatureFormat) {
 /* harmony default export */ var format_XMLFeature = (XMLFeature_XMLFeature);
 
 //# sourceMappingURL=XMLFeature.js.map
-// CONCATENATED MODULE: ./node_modules/ol/geom/flat/interpolate.js
-/**
- * @module ol/geom/flat/interpolate
- */
-
-
-
-
-/**
- * @param {Array<number>} flatCoordinates Flat coordinates.
- * @param {number} offset Offset.
- * @param {number} end End.
- * @param {number} stride Stride.
- * @param {number} fraction Fraction.
- * @param {Array<number>=} opt_dest Destination.
- * @return {Array<number>} Destination.
- */
-function interpolatePoint(flatCoordinates, offset, end, stride, fraction, opt_dest) {
-  var pointX = NaN;
-  var pointY = NaN;
-  var n = (end - offset) / stride;
-  if (n === 1) {
-    pointX = flatCoordinates[offset];
-    pointY = flatCoordinates[offset + 1];
-  } else if (n == 2) {
-    pointX = (1 - fraction) * flatCoordinates[offset] +
-        fraction * flatCoordinates[offset + stride];
-    pointY = (1 - fraction) * flatCoordinates[offset + 1] +
-        fraction * flatCoordinates[offset + stride + 1];
-  } else if (n !== 0) {
-    var x1 = flatCoordinates[offset];
-    var y1 = flatCoordinates[offset + 1];
-    var length = 0;
-    var cumulativeLengths = [0];
-    for (var i = offset + stride; i < end; i += stride) {
-      var x2 = flatCoordinates[i];
-      var y2 = flatCoordinates[i + 1];
-      length += Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));
-      cumulativeLengths.push(length);
-      x1 = x2;
-      y1 = y2;
-    }
-    var target = fraction * length;
-    var index = binarySearch(cumulativeLengths, target);
-    if (index < 0) {
-      var t = (target - cumulativeLengths[-index - 2]) /
-          (cumulativeLengths[-index - 1] - cumulativeLengths[-index - 2]);
-      var o = offset + (-index - 2) * stride;
-      pointX = lerp(
-        flatCoordinates[o], flatCoordinates[o + stride], t);
-      pointY = lerp(
-        flatCoordinates[o + 1], flatCoordinates[o + stride + 1], t);
-    } else {
-      pointX = flatCoordinates[offset + index * stride];
-      pointY = flatCoordinates[offset + index * stride + 1];
-    }
-  }
-  if (opt_dest) {
-    opt_dest[0] = pointX;
-    opt_dest[1] = pointY;
-    return opt_dest;
-  } else {
-    return [pointX, pointY];
-  }
-}
-
-
-/**
- * @param {Array<number>} flatCoordinates Flat coordinates.
- * @param {number} offset Offset.
- * @param {number} end End.
- * @param {number} stride Stride.
- * @param {number} m M.
- * @param {boolean} extrapolate Extrapolate.
- * @return {import("../../coordinate.js").Coordinate} Coordinate.
- */
-function lineStringCoordinateAtM(flatCoordinates, offset, end, stride, m, extrapolate) {
-  if (end == offset) {
-    return null;
-  }
-  var coordinate;
-  if (m < flatCoordinates[offset + stride - 1]) {
-    if (extrapolate) {
-      coordinate = flatCoordinates.slice(offset, offset + stride);
-      coordinate[stride - 1] = m;
-      return coordinate;
-    } else {
-      return null;
-    }
-  } else if (flatCoordinates[end - 1] < m) {
-    if (extrapolate) {
-      coordinate = flatCoordinates.slice(end - stride, end);
-      coordinate[stride - 1] = m;
-      return coordinate;
-    } else {
-      return null;
-    }
-  }
-  // FIXME use O(1) search
-  if (m == flatCoordinates[offset + stride - 1]) {
-    return flatCoordinates.slice(offset, offset + stride);
-  }
-  var lo = offset / stride;
-  var hi = end / stride;
-  while (lo < hi) {
-    var mid = (lo + hi) >> 1;
-    if (m < flatCoordinates[(mid + 1) * stride - 1]) {
-      hi = mid;
-    } else {
-      lo = mid + 1;
-    }
-  }
-  var m0 = flatCoordinates[lo * stride - 1];
-  if (m == m0) {
-    return flatCoordinates.slice((lo - 1) * stride, (lo - 1) * stride + stride);
-  }
-  var m1 = flatCoordinates[(lo + 1) * stride - 1];
-  var t = (m - m0) / (m1 - m0);
-  coordinate = [];
-  for (var i = 0; i < stride - 1; ++i) {
-    coordinate.push(lerp(flatCoordinates[(lo - 1) * stride + i],
-      flatCoordinates[lo * stride + i], t));
-  }
-  coordinate.push(m);
-  return coordinate;
-}
-
-
-/**
- * @param {Array<number>} flatCoordinates Flat coordinates.
- * @param {number} offset Offset.
- * @param {Array<number>} ends Ends.
- * @param {number} stride Stride.
- * @param {number} m M.
- * @param {boolean} extrapolate Extrapolate.
- * @param {boolean} interpolate Interpolate.
- * @return {import("../../coordinate.js").Coordinate} Coordinate.
- */
-function lineStringsCoordinateAtM(
-  flatCoordinates, offset, ends, stride, m, extrapolate, interpolate) {
-  if (interpolate) {
-    return lineStringCoordinateAtM(
-      flatCoordinates, offset, ends[ends.length - 1], stride, m, extrapolate);
-  }
-  var coordinate;
-  if (m < flatCoordinates[stride - 1]) {
-    if (extrapolate) {
-      coordinate = flatCoordinates.slice(0, stride);
-      coordinate[stride - 1] = m;
-      return coordinate;
-    } else {
-      return null;
-    }
-  }
-  if (flatCoordinates[flatCoordinates.length - 1] < m) {
-    if (extrapolate) {
-      coordinate = flatCoordinates.slice(flatCoordinates.length - stride);
-      coordinate[stride - 1] = m;
-      return coordinate;
-    } else {
-      return null;
-    }
-  }
-  for (var i = 0, ii = ends.length; i < ii; ++i) {
-    var end = ends[i];
-    if (offset == end) {
-      continue;
-    }
-    if (m < flatCoordinates[offset + stride - 1]) {
-      return null;
-    } else if (m <= flatCoordinates[end - 1]) {
-      return lineStringCoordinateAtM(
-        flatCoordinates, offset, end, stride, m, false);
-    }
-    offset = end;
-  }
-  return null;
-}
-
-//# sourceMappingURL=interpolate.js.map
-// CONCATENATED MODULE: ./node_modules/ol/geom/LineString.js
-/**
- * @module ol/geom/LineString
- */
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-/**
- * @classdesc
- * Linestring geometry.
- *
- * @api
- */
-var LineString_LineString = /*@__PURE__*/(function (SimpleGeometry) {
-  function LineString(coordinates, opt_layout) {
-
-    SimpleGeometry.call(this);
-
-    /**
-     * @private
-     * @type {import("../coordinate.js").Coordinate}
-     */
-    this.flatMidpoint_ = null;
-
-    /**
-     * @private
-     * @type {number}
-     */
-    this.flatMidpointRevision_ = -1;
-
-    /**
-     * @private
-     * @type {number}
-     */
-    this.maxDelta_ = -1;
-
-    /**
-     * @private
-     * @type {number}
-     */
-    this.maxDeltaRevision_ = -1;
-
-    if (opt_layout !== undefined && !Array.isArray(coordinates[0])) {
-      this.setFlatCoordinates(opt_layout, /** @type {Array<number>} */ (coordinates));
-    } else {
-      this.setCoordinates(/** @type {Array<import("../coordinate.js").Coordinate>} */ (coordinates), opt_layout);
-    }
-
-  }
-
-  if ( SimpleGeometry ) LineString.__proto__ = SimpleGeometry;
-  LineString.prototype = Object.create( SimpleGeometry && SimpleGeometry.prototype );
-  LineString.prototype.constructor = LineString;
-
-  /**
-   * Append the passed coordinate to the coordinates of the linestring.
-   * @param {import("../coordinate.js").Coordinate} coordinate Coordinate.
-   * @api
-   */
-  LineString.prototype.appendCoordinate = function appendCoordinate (coordinate) {
-    if (!this.flatCoordinates) {
-      this.flatCoordinates = coordinate.slice();
-    } else {
-      extend(this.flatCoordinates, coordinate);
-    }
-    this.changed();
-  };
-
-  /**
-   * Make a complete copy of the geometry.
-   * @return {!LineString} Clone.
-   * @override
-   * @api
-   */
-  LineString.prototype.clone = function clone () {
-    return new LineString(this.flatCoordinates.slice(), this.layout);
-  };
-
-  /**
-   * @inheritDoc
-   */
-  LineString.prototype.closestPointXY = function closestPointXY (x, y, closestPoint, minSquaredDistance) {
-    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {
-      return minSquaredDistance;
-    }
-    if (this.maxDeltaRevision_ != this.getRevision()) {
-      this.maxDelta_ = Math.sqrt(maxSquaredDelta(
-        this.flatCoordinates, 0, this.flatCoordinates.length, this.stride, 0));
-      this.maxDeltaRevision_ = this.getRevision();
-    }
-    return assignClosestPoint(
-      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,
-      this.maxDelta_, false, x, y, closestPoint, minSquaredDistance);
-  };
-
-  /**
-   * Iterate over each segment, calling the provided callback.
-   * If the callback returns a truthy value the function returns that
-   * value immediately. Otherwise the function returns `false`.
-   *
-   * @param {function(this: S, import("../coordinate.js").Coordinate, import("../coordinate.js").Coordinate): T} callback Function
-   *     called for each segment.
-   * @return {T|boolean} Value.
-   * @template T,S
-   * @api
-   */
-  LineString.prototype.forEachSegment = function forEachSegment$1 (callback) {
-    return forEach(this.flatCoordinates, 0, this.flatCoordinates.length, this.stride, callback);
-  };
-
-  /**
-   * Returns the coordinate at `m` using linear interpolation, or `null` if no
-   * such coordinate exists.
-   *
-   * `opt_extrapolate` controls extrapolation beyond the range of Ms in the
-   * MultiLineString. If `opt_extrapolate` is `true` then Ms less than the first
-   * M will return the first coordinate and Ms greater than the last M will
-   * return the last coordinate.
-   *
-   * @param {number} m M.
-   * @param {boolean=} opt_extrapolate Extrapolate. Default is `false`.
-   * @return {import("../coordinate.js").Coordinate} Coordinate.
-   * @api
-   */
-  LineString.prototype.getCoordinateAtM = function getCoordinateAtM (m, opt_extrapolate) {
-    if (this.layout != GeometryLayout.XYM &&
-        this.layout != GeometryLayout.XYZM) {
-      return null;
-    }
-    var extrapolate = opt_extrapolate !== undefined ? opt_extrapolate : false;
-    return lineStringCoordinateAtM(this.flatCoordinates, 0,
-      this.flatCoordinates.length, this.stride, m, extrapolate);
-  };
-
-  /**
-   * Return the coordinates of the linestring.
-   * @return {Array<import("../coordinate.js").Coordinate>} Coordinates.
-   * @override
-   * @api
-   */
-  LineString.prototype.getCoordinates = function getCoordinates () {
-    return inflateCoordinates(
-      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);
-  };
-
-  /**
-   * Return the coordinate at the provided fraction along the linestring.
-   * The `fraction` is a number between 0 and 1, where 0 is the start of the
-   * linestring and 1 is the end.
-   * @param {number} fraction Fraction.
-   * @param {import("../coordinate.js").Coordinate=} opt_dest Optional coordinate whose values will
-   *     be modified. If not provided, a new coordinate will be returned.
-   * @return {import("../coordinate.js").Coordinate} Coordinate of the interpolated point.
-   * @api
-   */
-  LineString.prototype.getCoordinateAt = function getCoordinateAt (fraction, opt_dest) {
-    return interpolatePoint(
-      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,
-      fraction, opt_dest);
-  };
-
-  /**
-   * Return the length of the linestring on projected plane.
-   * @return {number} Length (on projected plane).
-   * @api
-   */
-  LineString.prototype.getLength = function getLength () {
-    return lineStringLength(
-      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);
-  };
-
-  /**
-   * @return {Array<number>} Flat midpoint.
-   */
-  LineString.prototype.getFlatMidpoint = function getFlatMidpoint () {
-    if (this.flatMidpointRevision_ != this.getRevision()) {
-      this.flatMidpoint_ = this.getCoordinateAt(0.5, this.flatMidpoint_);
-      this.flatMidpointRevision_ = this.getRevision();
-    }
-    return this.flatMidpoint_;
-  };
-
-  /**
-   * @inheritDoc
-   */
-  LineString.prototype.getSimplifiedGeometryInternal = function getSimplifiedGeometryInternal (squaredTolerance) {
-    var simplifiedFlatCoordinates = [];
-    simplifiedFlatCoordinates.length = douglasPeucker(
-      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,
-      squaredTolerance, simplifiedFlatCoordinates, 0);
-    return new LineString(simplifiedFlatCoordinates, GeometryLayout.XY);
-  };
-
-  /**
-   * @inheritDoc
-   * @api
-   */
-  LineString.prototype.getType = function getType () {
-    return GeometryType.LINE_STRING;
-  };
-
-  /**
-   * @inheritDoc
-   * @api
-   */
-  LineString.prototype.intersectsExtent = function intersectsExtent (extent) {
-    return intersectsLineString(
-      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,
-      extent);
-  };
-
-  /**
-   * Set the coordinates of the linestring.
-   * @param {!Array<import("../coordinate.js").Coordinate>} coordinates Coordinates.
-   * @param {GeometryLayout=} opt_layout Layout.
-   * @override
-   * @api
-   */
-  LineString.prototype.setCoordinates = function setCoordinates (coordinates, opt_layout) {
-    this.setLayout(opt_layout, coordinates, 1);
-    if (!this.flatCoordinates) {
-      this.flatCoordinates = [];
-    }
-    this.flatCoordinates.length = deflateCoordinates(
-      this.flatCoordinates, 0, coordinates, this.stride);
-    this.changed();
-  };
-
-  return LineString;
-}(geom_SimpleGeometry));
-
-
-/* harmony default export */ var geom_LineString = (LineString_LineString);
-
-//# sourceMappingURL=LineString.js.map
 // CONCATENATED MODULE: ./node_modules/ol/format/OSMXML.js
 /**
  * @module ol/format/OSMXML
@@ -47631,6 +51115,7 @@ Text_Text.prototype.setPadding = function setPadding (padding) {
 
 
 
+
 
 
 const coordinate_cccamp19 = fromLonLat([13.30735, 53.03127]);
@@ -47714,7 +51199,7 @@ var app_styles = {
 	},
 	'natural': {
 		'tree': new style_Style({
-			image: new Circle({
+			image: new style_Circle({
 				radius: 2,
 				fill: new style_Fill({
 					     color: 'rgba(140, 208, 95, 1.0)'
@@ -47739,13 +51224,33 @@ var app_styles = {
 	}
 };
 
-var app_vectorSource = new source_Vector({
+var app_vectorSource = new Vector({
 	format: new format_OSMXML(),
 	url: 'https://seafile.milliways.info/f/688170149668429f9598/?dl=1',
 	strategy: loadingstrategy_all,
 	attributions: '&#169;<a href="https://git.milliways.info/Milliways/cccamp19-map">Milliways</a>',
 });
 
+var messureSource = new Vector();
+var messureLayer = new layer_Vector({
+	title: 'Messure',
+	source: messureSource,
+	style: new style_Style({
+		fill: new style_Fill({
+			color: 'rgba(255, 255, 255, 0.2)'
+		}),
+		stroke: new style_Stroke({
+			color: '#ffcc33',
+			width: 2
+		}),
+		image: new style_Circle({
+			radius: 7,
+			fill: new style_Fill({
+				color: '#ffcc33'
+			})
+		})
+	})
+});
 var orthoLayer = new layer_Tile({
 	title: 'Ortho Imagery',
 	type: 'base',
@@ -47758,7 +51263,7 @@ var orthoLayer = new layer_Tile({
 	})
 });
 
-var app_vectorLayer =  new Vector({
+var app_vectorLayer =  new layer_Vector({
       title: 'Milliways Overlay',
       source: app_vectorSource,
       style: function(feature) {
@@ -47794,7 +51299,9 @@ var osmLayer = new layer_Tile({
 var app_map = new MapClass({
 	target: 'map',
 	controls: defaults().extend([
-		new ol_layerswitcher_default.a()
+		new ol_layerswitcher_default.a(),
+		new control_ScaleLine(),
+		new src_MessureControl({ source: messureSource}),
 	]),
 	numZoomLevels: 19,
 	units: 'm',
@@ -47809,7 +51316,8 @@ var app_map = new MapClass({
 		new Group({
 			title: 'overlays',
 			layers: [
-				app_vectorLayer
+				app_vectorLayer,
+				messureLayer,
 			]
 		})
 	],
diff --git a/dist/main.js.map b/dist/main.js.map
index 4e424e4..1720da2 100644
--- a/dist/main.js.map
+++ b/dist/main.js.map
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\t\t__webpack_require__.r(ns);\n \t\tObject.defineProperty(ns, 'default', { enumerable: true, value: value });\n \t\tif(mode & 2 && typeof value != 'string') for(var key in value) __webpack_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key));\n \t\treturn ns;\n \t};\n\n \t// getDefaultExport function for compatibility with non-harmony modules\n \t__webpack_require__.n = function(module) {\n \t\tvar getter = module && module.__esModule ?\n \t\t\tfunction getDefault() { return module['default']; } :\n \t\t\tfunction getModuleExports() { return module; };\n \t\t__webpack_require__.d(getter, 'a', getter);\n \t\treturn getter;\n \t};\n\n \t// Object.prototype.hasOwnProperty.call\n \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__webpack_require__.p = \"\";\n\n\n \t// Load entry module and return exports\n \treturn __webpack_require__(__webpack_require__.s = 25);\n","/**\n * @module ol/util\n */\n\n/**\n * @return {?} Any return.\n */\nexport function abstract() {\n  return /** @type {?} */ ((function() {\n    throw new Error('Unimplemented abstract method.');\n  })());\n}\n\n/**\n * Inherit the prototype methods from one constructor into another.\n *\n * Usage:\n *\n *     function ParentClass(a, b) { }\n *     ParentClass.prototype.foo = function(a) { }\n *\n *     function ChildClass(a, b, c) {\n *       // Call parent constructor\n *       ParentClass.call(this, a, b);\n *     }\n *     inherits(ChildClass, ParentClass);\n *\n *     var child = new ChildClass('a', 'b', 'see');\n *     child.foo(); // This works.\n *\n * @param {!Function} childCtor Child constructor.\n * @param {!Function} parentCtor Parent constructor.\n * @function module:ol.inherits\n * @deprecated\n * @api\n */\nexport function inherits(childCtor, parentCtor) {\n  childCtor.prototype = Object.create(parentCtor.prototype);\n  childCtor.prototype.constructor = childCtor;\n}\n\n/**\n * Counter for getUid.\n * @type {number}\n * @private\n */\nvar uidCounter_ = 0;\n\n/**\n * Gets a unique ID for an object. This mutates the object so that further calls\n * with the same object as a parameter returns the same value. Unique IDs are generated\n * as a strictly increasing sequence. Adapted from goog.getUid.\n *\n * @param {Object} obj The object to get the unique ID for.\n * @return {string} The unique ID for the object.\n * @function module:ol.getUid\n * @api\n */\nexport function getUid(obj) {\n  return obj.ol_uid || (obj.ol_uid = String(++uidCounter_));\n}\n\n/**\n * OpenLayers version.\n * @type {string}\n */\nexport var VERSION = '5.3.3';\n\n//# sourceMappingURL=util.js.map","/**\n * @module ol/events\n */\nimport {clear} from './obj.js';\n\n\n/**\n * Key to use with {@link module:ol/Observable~Observable#unByKey}.\n * @typedef {Object} EventsKey\n * @property {Object} [bindTo]\n * @property {ListenerFunction} [boundListener]\n * @property {boolean} callOnce\n * @property {number} [deleteIndex]\n * @property {ListenerFunction} listener\n * @property {import(\"./events/Target.js\").EventTargetLike} target\n * @property {string} type\n * @api\n */\n\n\n/**\n * Listener function. This function is called with an event object as argument.\n * When the function returns `false`, event propagation will stop.\n *\n * @typedef {function((Event|import(\"./events/Event.js\").default)): (void|boolean)} ListenerFunction\n * @api\n */\n\n\n/**\n * @param {EventsKey} listenerObj Listener object.\n * @return {ListenerFunction} Bound listener.\n */\nexport function bindListener(listenerObj) {\n  var boundListener = function(evt) {\n    var listener = listenerObj.listener;\n    var bindTo = listenerObj.bindTo || listenerObj.target;\n    if (listenerObj.callOnce) {\n      unlistenByKey(listenerObj);\n    }\n    return listener.call(bindTo, evt);\n  };\n  listenerObj.boundListener = boundListener;\n  return boundListener;\n}\n\n\n/**\n * Finds the matching {@link module:ol/events~EventsKey} in the given listener\n * array.\n *\n * @param {!Array<!EventsKey>} listeners Array of listeners.\n * @param {!Function} listener The listener function.\n * @param {Object=} opt_this The `this` value inside the listener.\n * @param {boolean=} opt_setDeleteIndex Set the deleteIndex on the matching\n *     listener, for {@link module:ol/events~unlistenByKey}.\n * @return {EventsKey|undefined} The matching listener object.\n */\nexport function findListener(listeners, listener, opt_this, opt_setDeleteIndex) {\n  var listenerObj;\n  for (var i = 0, ii = listeners.length; i < ii; ++i) {\n    listenerObj = listeners[i];\n    if (listenerObj.listener === listener &&\n        listenerObj.bindTo === opt_this) {\n      if (opt_setDeleteIndex) {\n        listenerObj.deleteIndex = i;\n      }\n      return listenerObj;\n    }\n  }\n  return undefined;\n}\n\n\n/**\n * @param {import(\"./events/Target.js\").EventTargetLike} target Target.\n * @param {string} type Type.\n * @return {Array<EventsKey>|undefined} Listeners.\n */\nexport function getListeners(target, type) {\n  var listenerMap = getListenerMap(target);\n  return listenerMap ? listenerMap[type] : undefined;\n}\n\n\n/**\n * Get the lookup of listeners.\n * @param {Object} target Target.\n * @param {boolean=} opt_create If a map should be created if it doesn't exist.\n * @return {!Object<string, Array<EventsKey>>} Map of\n *     listeners by event type.\n */\nfunction getListenerMap(target, opt_create) {\n  var listenerMap = target.ol_lm;\n  if (!listenerMap && opt_create) {\n    listenerMap = target.ol_lm = {};\n  }\n  return listenerMap;\n}\n\n\n/**\n * Remove the listener map from a target.\n * @param {Object} target Target.\n */\nfunction removeListenerMap(target) {\n  delete target.ol_lm;\n}\n\n\n/**\n * Clean up all listener objects of the given type.  All properties on the\n * listener objects will be removed, and if no listeners remain in the listener\n * map, it will be removed from the target.\n * @param {import(\"./events/Target.js\").EventTargetLike} target Target.\n * @param {string} type Type.\n */\nfunction removeListeners(target, type) {\n  var listeners = getListeners(target, type);\n  if (listeners) {\n    for (var i = 0, ii = listeners.length; i < ii; ++i) {\n      /** @type {import(\"./events/Target.js\").default} */ (target).\n        removeEventListener(type, listeners[i].boundListener);\n      clear(listeners[i]);\n    }\n    listeners.length = 0;\n    var listenerMap = getListenerMap(target);\n    if (listenerMap) {\n      delete listenerMap[type];\n      if (Object.keys(listenerMap).length === 0) {\n        removeListenerMap(target);\n      }\n    }\n  }\n}\n\n\n/**\n * Registers an event listener on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * This function efficiently binds a `listener` to a `this` object, and returns\n * a key for use with {@link module:ol/events~unlistenByKey}.\n *\n * @param {import(\"./events/Target.js\").EventTargetLike} target Event target.\n * @param {string} type Event type.\n * @param {ListenerFunction} listener Listener.\n * @param {Object=} opt_this Object referenced by the `this` keyword in the\n *     listener. Default is the `target`.\n * @param {boolean=} opt_once If true, add the listener as one-off listener.\n * @return {EventsKey} Unique key for the listener.\n */\nexport function listen(target, type, listener, opt_this, opt_once) {\n  var listenerMap = getListenerMap(target, true);\n  var listeners = listenerMap[type];\n  if (!listeners) {\n    listeners = listenerMap[type] = [];\n  }\n  var listenerObj = findListener(listeners, listener, opt_this, false);\n  if (listenerObj) {\n    if (!opt_once) {\n      // Turn one-off listener into a permanent one.\n      listenerObj.callOnce = false;\n    }\n  } else {\n    listenerObj = /** @type {EventsKey} */ ({\n      bindTo: opt_this,\n      callOnce: !!opt_once,\n      listener: listener,\n      target: target,\n      type: type\n    });\n    /** @type {import(\"./events/Target.js\").default} */ (target).\n      addEventListener(type, bindListener(listenerObj));\n    listeners.push(listenerObj);\n  }\n\n  return listenerObj;\n}\n\n\n/**\n * Registers a one-off event listener on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * This function efficiently binds a `listener` as self-unregistering listener\n * to a `this` object, and returns a key for use with\n * {@link module:ol/events~unlistenByKey} in case the listener needs to be\n * unregistered before it is called.\n *\n * When {@link module:ol/events~listen} is called with the same arguments after this\n * function, the self-unregistering listener will be turned into a permanent\n * listener.\n *\n * @param {import(\"./events/Target.js\").EventTargetLike} target Event target.\n * @param {string} type Event type.\n * @param {ListenerFunction} listener Listener.\n * @param {Object=} opt_this Object referenced by the `this` keyword in the\n *     listener. Default is the `target`.\n * @return {EventsKey} Key for unlistenByKey.\n */\nexport function listenOnce(target, type, listener, opt_this) {\n  return listen(target, type, listener, opt_this, true);\n}\n\n\n/**\n * Unregisters an event listener on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * To return a listener, this function needs to be called with the exact same\n * arguments that were used for a previous {@link module:ol/events~listen} call.\n *\n * @param {import(\"./events/Target.js\").EventTargetLike} target Event target.\n * @param {string} type Event type.\n * @param {ListenerFunction} listener Listener.\n * @param {Object=} opt_this Object referenced by the `this` keyword in the\n *     listener. Default is the `target`.\n */\nexport function unlisten(target, type, listener, opt_this) {\n  var listeners = getListeners(target, type);\n  if (listeners) {\n    var listenerObj = findListener(listeners, listener, opt_this, true);\n    if (listenerObj) {\n      unlistenByKey(listenerObj);\n    }\n  }\n}\n\n\n/**\n * Unregisters event listeners on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * The argument passed to this function is the key returned from\n * {@link module:ol/events~listen} or {@link module:ol/events~listenOnce}.\n *\n * @param {EventsKey} key The key.\n */\nexport function unlistenByKey(key) {\n  if (key && key.target) {\n    /** @type {import(\"./events/Target.js\").default} */ (key.target).\n      removeEventListener(key.type, key.boundListener);\n    var listeners = getListeners(key.target, key.type);\n    if (listeners) {\n      var i = 'deleteIndex' in key ? key.deleteIndex : listeners.indexOf(key);\n      if (i !== -1) {\n        listeners.splice(i, 1);\n      }\n      if (listeners.length === 0) {\n        removeListeners(key.target, key.type);\n      }\n    }\n    clear(key);\n  }\n}\n\n\n/**\n * Unregisters all event listeners on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * @param {import(\"./events/Target.js\").EventTargetLike} target Target.\n */\nexport function unlistenAll(target) {\n  var listenerMap = getListenerMap(target);\n  if (listenerMap) {\n    for (var type in listenerMap) {\n      removeListeners(target, type);\n    }\n  }\n}\n\n//# sourceMappingURL=events.js.map","/**\n * @module ol/events/EventType\n */\n\n/**\n * @enum {string}\n * @const\n */\nexport default {\n  /**\n   * Generic change event. Triggered when the revision counter is increased.\n   * @event module:ol/events/Event~Event#change\n   * @api\n   */\n  CHANGE: 'change',\n\n  CLEAR: 'clear',\n  CONTEXTMENU: 'contextmenu',\n  CLICK: 'click',\n  DBLCLICK: 'dblclick',\n  DRAGENTER: 'dragenter',\n  DRAGOVER: 'dragover',\n  DROP: 'drop',\n  ERROR: 'error',\n  KEYDOWN: 'keydown',\n  KEYPRESS: 'keypress',\n  LOAD: 'load',\n  MOUSEDOWN: 'mousedown',\n  MOUSEMOVE: 'mousemove',\n  MOUSEOUT: 'mouseout',\n  MOUSEUP: 'mouseup',\n  MOUSEWHEEL: 'mousewheel',\n  MSPOINTERDOWN: 'MSPointerDown',\n  RESIZE: 'resize',\n  TOUCHSTART: 'touchstart',\n  TOUCHMOVE: 'touchmove',\n  TOUCHEND: 'touchend',\n  WHEEL: 'wheel'\n};\n\n//# sourceMappingURL=EventType.js.map","/**\n * @module ol/obj\n */\n\n\n/**\n * Polyfill for Object.assign().  Assigns enumerable and own properties from\n * one or more source objects to a target object.\n * See https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Object/assign.\n *\n * @param {!Object} target The target object.\n * @param {...Object} var_sources The source object(s).\n * @return {!Object} The modified target object.\n */\nexport var assign = (typeof Object.assign === 'function') ? Object.assign : function(target, var_sources) {\n  var arguments$1 = arguments;\n\n  if (target === undefined || target === null) {\n    throw new TypeError('Cannot convert undefined or null to object');\n  }\n\n  var output = Object(target);\n  for (var i = 1, ii = arguments.length; i < ii; ++i) {\n    var source = arguments$1[i];\n    if (source !== undefined && source !== null) {\n      for (var key in source) {\n        if (source.hasOwnProperty(key)) {\n          output[key] = source[key];\n        }\n      }\n    }\n  }\n  return output;\n};\n\n\n/**\n * Removes all properties from an object.\n * @param {Object} object The object to clear.\n */\nexport function clear(object) {\n  for (var property in object) {\n    delete object[property];\n  }\n}\n\n\n/**\n * Get an array of property values from an object.\n * @param {Object<K,V>} object The object from which to get the values.\n * @return {!Array<V>} The property values.\n * @template K,V\n */\nexport function getValues(object) {\n  var values = [];\n  for (var property in object) {\n    values.push(object[property]);\n  }\n  return values;\n}\n\n\n/**\n * Determine if an object has any properties.\n * @param {Object} object The object to check.\n * @return {boolean} The object is empty.\n */\nexport function isEmpty(object) {\n  var property;\n  for (property in object) {\n    return false;\n  }\n  return !property;\n}\n\n//# sourceMappingURL=obj.js.map","/**\n * @module ol/dom\n */\n\n\n/**\n * Create an html canvas element and returns its 2d context.\n * @param {number=} opt_width Canvas width.\n * @param {number=} opt_height Canvas height.\n * @return {CanvasRenderingContext2D} The context.\n */\nexport function createCanvasContext2D(opt_width, opt_height) {\n  var canvas = /** @type {HTMLCanvasElement} */ (document.createElement('canvas'));\n  if (opt_width) {\n    canvas.width = opt_width;\n  }\n  if (opt_height) {\n    canvas.height = opt_height;\n  }\n  return /** @type {CanvasRenderingContext2D} */ (canvas.getContext('2d'));\n}\n\n\n/**\n * Get the current computed width for the given element including margin,\n * padding and border.\n * Equivalent to jQuery's `$(el).outerWidth(true)`.\n * @param {!HTMLElement} element Element.\n * @return {number} The width.\n */\nexport function outerWidth(element) {\n  var width = element.offsetWidth;\n  var style = getComputedStyle(element);\n  width += parseInt(style.marginLeft, 10) + parseInt(style.marginRight, 10);\n\n  return width;\n}\n\n\n/**\n * Get the current computed height for the given element including margin,\n * padding and border.\n * Equivalent to jQuery's `$(el).outerHeight(true)`.\n * @param {!HTMLElement} element Element.\n * @return {number} The height.\n */\nexport function outerHeight(element) {\n  var height = element.offsetHeight;\n  var style = getComputedStyle(element);\n  height += parseInt(style.marginTop, 10) + parseInt(style.marginBottom, 10);\n\n  return height;\n}\n\n/**\n * @param {Node} newNode Node to replace old node\n * @param {Node} oldNode The node to be replaced\n */\nexport function replaceNode(newNode, oldNode) {\n  var parent = oldNode.parentNode;\n  if (parent) {\n    parent.replaceChild(newNode, oldNode);\n  }\n}\n\n/**\n * @param {Node} node The node to remove.\n * @returns {Node} The node that was removed or null.\n */\nexport function removeNode(node) {\n  return node && node.parentNode ? node.parentNode.removeChild(node) : null;\n}\n\n/**\n * @param {Node} node The node to remove the children from.\n */\nexport function removeChildren(node) {\n  while (node.lastChild) {\n    node.removeChild(node.lastChild);\n  }\n}\n\n//# sourceMappingURL=dom.js.map","/**\n * @module ol/functions\n */\n\n/**\n * Always returns true.\n * @returns {boolean} true.\n */\nexport function TRUE() {\n  return true;\n}\n\n/**\n * Always returns false.\n * @returns {boolean} false.\n */\nexport function FALSE() {\n  return false;\n}\n\n/**\n * A reusable function, used e.g. as a default for callbacks.\n *\n * @return {void} Nothing.\n */\nexport function VOID() {}\n\n//# sourceMappingURL=functions.js.map","/**\n * @module ol/Object\n */\nimport {getUid} from './util.js';\nimport ObjectEventType from './ObjectEventType.js';\nimport Observable from './Observable.js';\nimport Event from './events/Event.js';\nimport {assign} from './obj.js';\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/Object~BaseObject} instances are instances of this type.\n */\nexport var ObjectEvent = /*@__PURE__*/(function (Event) {\n  function ObjectEvent(type, key, oldValue) {\n    Event.call(this, type);\n\n    /**\n     * The name of the property whose value is changing.\n     * @type {string}\n     * @api\n     */\n    this.key = key;\n\n    /**\n     * The old value. To get the new value use `e.target.get(e.key)` where\n     * `e` is the event object.\n     * @type {*}\n     * @api\n     */\n    this.oldValue = oldValue;\n\n  }\n\n  if ( Event ) ObjectEvent.__proto__ = Event;\n  ObjectEvent.prototype = Object.create( Event && Event.prototype );\n  ObjectEvent.prototype.constructor = ObjectEvent;\n\n  return ObjectEvent;\n}(Event));\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Most non-trivial classes inherit from this.\n *\n * This extends {@link module:ol/Observable} with observable\n * properties, where each property is observable as well as the object as a\n * whole.\n *\n * Classes that inherit from this have pre-defined properties, to which you can\n * add your owns. The pre-defined properties are listed in this documentation as\n * 'Observable Properties', and have their own accessors; for example,\n * {@link module:ol/Map~Map} has a `target` property, accessed with\n * `getTarget()` and changed with `setTarget()`. Not all properties are however\n * settable. There are also general-purpose accessors `get()` and `set()`. For\n * example, `get('target')` is equivalent to `getTarget()`.\n *\n * The `set` accessors trigger a change event, and you can monitor this by\n * registering a listener. For example, {@link module:ol/View~View} has a\n * `center` property, so `view.on('change:center', function(evt) {...});` would\n * call the function whenever the value of the center property changes. Within\n * the function, `evt.target` would be the view, so `evt.target.getCenter()`\n * would return the new center.\n *\n * You can add your own observable properties with\n * `object.set('prop', 'value')`, and retrieve that with `object.get('prop')`.\n * You can listen for changes on that property value with\n * `object.on('change:prop', listener)`. You can get a list of all\n * properties with {@link module:ol/Object~BaseObject#getProperties}.\n *\n * Note that the observable properties are separate from standard JS properties.\n * You can, for example, give your map object a title with\n * `map.title='New title'` and with `map.set('title', 'Another title')`. The\n * first will be a `hasOwnProperty`; the second will appear in\n * `getProperties()`. Only the second is observable.\n *\n * Properties can be deleted by using the unset method. E.g.\n * object.unset('foo').\n *\n * @fires ObjectEvent\n * @api\n */\nvar BaseObject = /*@__PURE__*/(function (Observable) {\n  function BaseObject(opt_values) {\n    Observable.call(this);\n\n    // Call {@link module:ol/util~getUid} to ensure that the order of objects' ids is\n    // the same as the order in which they were created.  This also helps to\n    // ensure that object properties are always added in the same order, which\n    // helps many JavaScript engines generate faster code.\n    getUid(this);\n\n    /**\n     * @private\n     * @type {!Object<string, *>}\n     */\n    this.values_ = {};\n\n    if (opt_values !== undefined) {\n      this.setProperties(opt_values);\n    }\n  }\n\n  if ( Observable ) BaseObject.__proto__ = Observable;\n  BaseObject.prototype = Object.create( Observable && Observable.prototype );\n  BaseObject.prototype.constructor = BaseObject;\n\n  /**\n   * Gets a value.\n   * @param {string} key Key name.\n   * @return {*} Value.\n   * @api\n   */\n  BaseObject.prototype.get = function get (key) {\n    var value;\n    if (this.values_.hasOwnProperty(key)) {\n      value = this.values_[key];\n    }\n    return value;\n  };\n\n  /**\n   * Get a list of object property names.\n   * @return {Array<string>} List of property names.\n   * @api\n   */\n  BaseObject.prototype.getKeys = function getKeys () {\n    return Object.keys(this.values_);\n  };\n\n  /**\n   * Get an object of all property names and values.\n   * @return {Object<string, *>} Object.\n   * @api\n   */\n  BaseObject.prototype.getProperties = function getProperties () {\n    return assign({}, this.values_);\n  };\n\n  /**\n   * @param {string} key Key name.\n   * @param {*} oldValue Old value.\n   */\n  BaseObject.prototype.notify = function notify (key, oldValue) {\n    var eventType;\n    eventType = getChangeEventType(key);\n    this.dispatchEvent(new ObjectEvent(eventType, key, oldValue));\n    eventType = ObjectEventType.PROPERTYCHANGE;\n    this.dispatchEvent(new ObjectEvent(eventType, key, oldValue));\n  };\n\n  /**\n   * Sets a value.\n   * @param {string} key Key name.\n   * @param {*} value Value.\n   * @param {boolean=} opt_silent Update without triggering an event.\n   * @api\n   */\n  BaseObject.prototype.set = function set (key, value, opt_silent) {\n    if (opt_silent) {\n      this.values_[key] = value;\n    } else {\n      var oldValue = this.values_[key];\n      this.values_[key] = value;\n      if (oldValue !== value) {\n        this.notify(key, oldValue);\n      }\n    }\n  };\n\n  /**\n   * Sets a collection of key-value pairs.  Note that this changes any existing\n   * properties and adds new ones (it does not remove any existing properties).\n   * @param {Object<string, *>} values Values.\n   * @param {boolean=} opt_silent Update without triggering an event.\n   * @api\n   */\n  BaseObject.prototype.setProperties = function setProperties (values, opt_silent) {\n    for (var key in values) {\n      this.set(key, values[key], opt_silent);\n    }\n  };\n\n  /**\n   * Unsets a property.\n   * @param {string} key Key name.\n   * @param {boolean=} opt_silent Unset without triggering an event.\n   * @api\n   */\n  BaseObject.prototype.unset = function unset (key, opt_silent) {\n    if (key in this.values_) {\n      var oldValue = this.values_[key];\n      delete this.values_[key];\n      if (!opt_silent) {\n        this.notify(key, oldValue);\n      }\n    }\n  };\n\n  return BaseObject;\n}(Observable));\n\n\n/**\n * @type {Object<string, string>}\n */\nvar changeEventTypeCache = {};\n\n\n/**\n * @param {string} key Key name.\n * @return {string} Change name.\n */\nexport function getChangeEventType(key) {\n  return changeEventTypeCache.hasOwnProperty(key) ?\n    changeEventTypeCache[key] :\n    (changeEventTypeCache[key] = 'change:' + key);\n}\n\n\nexport default BaseObject;\n\n//# sourceMappingURL=Object.js.map","/**\n * @module ol/events/Event\n */\n\n/**\n * @classdesc\n * Stripped down implementation of the W3C DOM Level 2 Event interface.\n * See https://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-interface.\n *\n * This implementation only provides `type` and `target` properties, and\n * `stopPropagation` and `preventDefault` methods. It is meant as base class\n * for higher level events defined in the library, and works with\n * {@link module:ol/events/Target~Target}.\n */\nvar Event = function Event(type) {\n\n  /**\n   * @type {boolean}\n   */\n  this.propagationStopped;\n\n  /**\n   * The event type.\n   * @type {string}\n   * @api\n   */\n  this.type = type;\n\n  /**\n   * The event target.\n   * @type {Object}\n   * @api\n   */\n  this.target = null;\n};\n\n/**\n * Stop event propagation.\n * @api\n */\nEvent.prototype.preventDefault = function preventDefault () {\n  this.propagationStopped = true;\n};\n\n/**\n * Stop event propagation.\n * @api\n */\nEvent.prototype.stopPropagation = function stopPropagation () {\n  this.propagationStopped = true;\n};\n\n\n/**\n * @param {Event|import(\"./Event.js\").default} evt Event\n */\nexport function stopPropagation(evt) {\n  evt.stopPropagation();\n}\n\n\n/**\n * @param {Event|import(\"./Event.js\").default} evt Event\n */\nexport function preventDefault(evt) {\n  evt.preventDefault();\n}\n\nexport default Event;\n\n//# sourceMappingURL=Event.js.map","/**\n * @module ol/events/Target\n */\nimport Disposable from '../Disposable.js';\nimport {unlistenAll} from '../events.js';\nimport {VOID} from '../functions.js';\nimport Event from './Event.js';\n\n\n/**\n * @typedef {EventTarget|Target} EventTargetLike\n */\n\n\n/**\n * @classdesc\n * A simplified implementation of the W3C DOM Level 2 EventTarget interface.\n * See https://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113/events.html#Events-EventTarget.\n *\n * There are two important simplifications compared to the specification:\n *\n * 1. The handling of `useCapture` in `addEventListener` and\n *    `removeEventListener`. There is no real capture model.\n * 2. The handling of `stopPropagation` and `preventDefault` on `dispatchEvent`.\n *    There is no event target hierarchy. When a listener calls\n *    `stopPropagation` or `preventDefault` on an event object, it means that no\n *    more listeners after this one will be called. Same as when the listener\n *    returns false.\n */\nvar Target = /*@__PURE__*/(function (Disposable) {\n  function Target() {\n\n    Disposable.call(this);\n\n    /**\n     * @private\n     * @type {!Object<string, number>}\n     */\n    this.pendingRemovals_ = {};\n\n    /**\n     * @private\n     * @type {!Object<string, number>}\n     */\n    this.dispatching_ = {};\n\n    /**\n     * @private\n     * @type {!Object<string, Array<import(\"../events.js\").ListenerFunction>>}\n     */\n    this.listeners_ = {};\n\n  }\n\n  if ( Disposable ) Target.__proto__ = Disposable;\n  Target.prototype = Object.create( Disposable && Disposable.prototype );\n  Target.prototype.constructor = Target;\n\n  /**\n   * @param {string} type Type.\n   * @param {import(\"../events.js\").ListenerFunction} listener Listener.\n   */\n  Target.prototype.addEventListener = function addEventListener (type, listener) {\n    var listeners = this.listeners_[type];\n    if (!listeners) {\n      listeners = this.listeners_[type] = [];\n    }\n    if (listeners.indexOf(listener) === -1) {\n      listeners.push(listener);\n    }\n  };\n\n  /**\n   * Dispatches an event and calls all listeners listening for events\n   * of this type. The event parameter can either be a string or an\n   * Object with a `type` property.\n   *\n   * @param {{type: string,\n   *     target: (EventTargetLike|undefined),\n   *     propagationStopped: (boolean|undefined)}|\n   *     import(\"./Event.js\").default|string} event Event object.\n   * @return {boolean|undefined} `false` if anyone called preventDefault on the\n   *     event object or if any of the listeners returned false.\n   * @api\n   */\n  Target.prototype.dispatchEvent = function dispatchEvent (event) {\n    var evt = typeof event === 'string' ? new Event(event) : event;\n    var type = evt.type;\n    evt.target = this;\n    var listeners = this.listeners_[type];\n    var propagate;\n    if (listeners) {\n      if (!(type in this.dispatching_)) {\n        this.dispatching_[type] = 0;\n        this.pendingRemovals_[type] = 0;\n      }\n      ++this.dispatching_[type];\n      for (var i = 0, ii = listeners.length; i < ii; ++i) {\n        if (listeners[i].call(this, evt) === false || evt.propagationStopped) {\n          propagate = false;\n          break;\n        }\n      }\n      --this.dispatching_[type];\n      if (this.dispatching_[type] === 0) {\n        var pendingRemovals = this.pendingRemovals_[type];\n        delete this.pendingRemovals_[type];\n        while (pendingRemovals--) {\n          this.removeEventListener(type, VOID);\n        }\n        delete this.dispatching_[type];\n      }\n      return propagate;\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  Target.prototype.disposeInternal = function disposeInternal () {\n    unlistenAll(this);\n  };\n\n  /**\n   * Get the listeners for a specified event type. Listeners are returned in the\n   * order that they will be called in.\n   *\n   * @param {string} type Type.\n   * @return {Array<import(\"../events.js\").ListenerFunction>} Listeners.\n   */\n  Target.prototype.getListeners = function getListeners (type) {\n    return this.listeners_[type];\n  };\n\n  /**\n   * @param {string=} opt_type Type. If not provided,\n   *     `true` will be returned if this event target has any listeners.\n   * @return {boolean} Has listeners.\n   */\n  Target.prototype.hasListener = function hasListener (opt_type) {\n    return opt_type ?\n      opt_type in this.listeners_ :\n      Object.keys(this.listeners_).length > 0;\n  };\n\n  /**\n   * @param {string} type Type.\n   * @param {import(\"../events.js\").ListenerFunction} listener Listener.\n   */\n  Target.prototype.removeEventListener = function removeEventListener (type, listener) {\n    var listeners = this.listeners_[type];\n    if (listeners) {\n      var index = listeners.indexOf(listener);\n      if (type in this.pendingRemovals_) {\n        // make listener a no-op, and remove later in #dispatchEvent()\n        listeners[index] = VOID;\n        ++this.pendingRemovals_[type];\n      } else {\n        listeners.splice(index, 1);\n        if (listeners.length === 0) {\n          delete this.listeners_[type];\n        }\n      }\n    }\n  };\n\n  return Target;\n}(Disposable));\n\n\nexport default Target;\n\n//# sourceMappingURL=Target.js.map","/**\n * @module ol/ObjectEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  /**\n   * Triggered when a property is changed.\n   * @event module:ol/Object.ObjectEvent#propertychange\n   * @api\n   */\n  PROPERTYCHANGE: 'propertychange'\n};\n\n//# sourceMappingURL=ObjectEventType.js.map","/**\n * @module ol/Disposable\n */\n\n/**\n * @classdesc\n * Objects that need to clean up after themselves.\n */\nvar Disposable = function Disposable() {\n  /**\n   * The object has already been disposed.\n   * @type {boolean}\n   * @private\n   */\n  this.disposed_ = false;\n};\n\n/**\n * Clean up.\n */\nDisposable.prototype.dispose = function dispose () {\n  if (!this.disposed_) {\n    this.disposed_ = true;\n    this.disposeInternal();\n  }\n};\n\n/**\n * Extension point for disposable objects.\n * @protected\n */\nDisposable.prototype.disposeInternal = function disposeInternal () {};\n\nexport default Disposable;\n\n//# sourceMappingURL=Disposable.js.map","/**\n * @module ol/control/Control\n */\nimport {VOID} from '../functions.js';\nimport MapEventType from '../MapEventType.js';\nimport BaseObject from '../Object.js';\nimport {removeNode} from '../dom.js';\nimport {listen, unlistenByKey} from '../events.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {HTMLElement} [element] The element is the control's\n * container element. This only needs to be specified if you're developing\n * a custom control.\n * @property {function(import(\"../MapEvent.js\").default)} [render] Function called when\n * the control should be re-rendered. This is called in a `requestAnimationFrame`\n * callback.\n * @property {HTMLElement|string} [target] Specify a target if you want\n * the control to be rendered outside of the map's viewport.\n */\n\n\n/**\n * @classdesc\n * A control is a visible widget with a DOM element in a fixed position on the\n * screen. They can involve user input (buttons), or be informational only;\n * the position is determined using CSS. By default these are placed in the\n * container with CSS class name `ol-overlaycontainer-stopevent`, but can use\n * any outside DOM element.\n *\n * This is the base class for controls. You can use it for simple custom\n * controls by creating the element with listeners, creating an instance:\n * ```js\n * var myControl = new Control({element: myElement});\n * ```\n * and then adding this to the map.\n *\n * The main advantage of having this as a control rather than a simple separate\n * DOM element is that preventing propagation is handled for you. Controls\n * will also be objects in a {@link module:ol/Collection~Collection}, so you can use their methods.\n *\n * You can also extend this base for your own control class. See\n * examples/custom-controls for an example of how to do this.\n *\n * @api\n */\nvar Control = /*@__PURE__*/(function (BaseObject) {\n  function Control(options) {\n\n    BaseObject.call(this);\n\n    /**\n     * @protected\n     * @type {HTMLElement}\n     */\n    this.element = options.element ? options.element : null;\n\n    /**\n     * @private\n     * @type {HTMLElement}\n     */\n    this.target_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../PluggableMap.js\").default}\n     */\n    this.map_ = null;\n\n    /**\n     * @protected\n     * @type {!Array<import(\"../events.js\").EventsKey>}\n     */\n    this.listenerKeys = [];\n\n    /**\n     * @type {function(import(\"../MapEvent.js\").default)}\n     */\n    this.render = options.render ? options.render : VOID;\n\n    if (options.target) {\n      this.setTarget(options.target);\n    }\n\n  }\n\n  if ( BaseObject ) Control.__proto__ = BaseObject;\n  Control.prototype = Object.create( BaseObject && BaseObject.prototype );\n  Control.prototype.constructor = Control;\n\n  /**\n   * @inheritDoc\n   */\n  Control.prototype.disposeInternal = function disposeInternal () {\n    removeNode(this.element);\n    BaseObject.prototype.disposeInternal.call(this);\n  };\n\n  /**\n   * Get the map associated with this control.\n   * @return {import(\"../PluggableMap.js\").default} Map.\n   * @api\n   */\n  Control.prototype.getMap = function getMap () {\n    return this.map_;\n  };\n\n  /**\n   * Remove the control from its current map and attach it to the new map.\n   * Subclasses may set up event handlers to get notified about changes to\n   * the map here.\n   * @param {import(\"../PluggableMap.js\").default} map Map.\n   * @api\n   */\n  Control.prototype.setMap = function setMap (map) {\n    if (this.map_) {\n      removeNode(this.element);\n    }\n    for (var i = 0, ii = this.listenerKeys.length; i < ii; ++i) {\n      unlistenByKey(this.listenerKeys[i]);\n    }\n    this.listenerKeys.length = 0;\n    this.map_ = map;\n    if (this.map_) {\n      var target = this.target_ ?\n        this.target_ : map.getOverlayContainerStopEvent();\n      target.appendChild(this.element);\n      if (this.render !== VOID) {\n        this.listenerKeys.push(listen(map,\n          MapEventType.POSTRENDER, this.render, this));\n      }\n      map.render();\n    }\n  };\n\n  /**\n   * This function is used to set a target element for the control. It has no\n   * effect if it is called after the control has been added to the map (i.e.\n   * after `setMap` is called on the control). If no `target` is set in the\n   * options passed to the control constructor and if `setTarget` is not called\n   * then the control is added to the map's overlay container.\n   * @param {HTMLElement|string} target Target.\n   * @api\n   */\n  Control.prototype.setTarget = function setTarget (target) {\n    this.target_ = typeof target === 'string' ?\n      document.getElementById(target) :\n      target;\n  };\n\n  return Control;\n}(BaseObject));\n\n\nexport default Control;\n\n//# sourceMappingURL=Control.js.map","'use strict';\n\nmodule.exports = rbush;\nmodule.exports.default = rbush;\n\nvar quickselect = require('quickselect');\n\nfunction rbush(maxEntries, format) {\n    if (!(this instanceof rbush)) return new rbush(maxEntries, format);\n\n    // max entries in a node is 9 by default; min node fill is 40% for best performance\n    this._maxEntries = Math.max(4, maxEntries || 9);\n    this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));\n\n    if (format) {\n        this._initFormat(format);\n    }\n\n    this.clear();\n}\n\nrbush.prototype = {\n\n    all: function () {\n        return this._all(this.data, []);\n    },\n\n    search: function (bbox) {\n\n        var node = this.data,\n            result = [],\n            toBBox = this.toBBox;\n\n        if (!intersects(bbox, node)) return result;\n\n        var nodesToSearch = [],\n            i, len, child, childBBox;\n\n        while (node) {\n            for (i = 0, len = node.children.length; i < len; i++) {\n\n                child = node.children[i];\n                childBBox = node.leaf ? toBBox(child) : child;\n\n                if (intersects(bbox, childBBox)) {\n                    if (node.leaf) result.push(child);\n                    else if (contains(bbox, childBBox)) this._all(child, result);\n                    else nodesToSearch.push(child);\n                }\n            }\n            node = nodesToSearch.pop();\n        }\n\n        return result;\n    },\n\n    collides: function (bbox) {\n\n        var node = this.data,\n            toBBox = this.toBBox;\n\n        if (!intersects(bbox, node)) return false;\n\n        var nodesToSearch = [],\n            i, len, child, childBBox;\n\n        while (node) {\n            for (i = 0, len = node.children.length; i < len; i++) {\n\n                child = node.children[i];\n                childBBox = node.leaf ? toBBox(child) : child;\n\n                if (intersects(bbox, childBBox)) {\n                    if (node.leaf || contains(bbox, childBBox)) return true;\n                    nodesToSearch.push(child);\n                }\n            }\n            node = nodesToSearch.pop();\n        }\n\n        return false;\n    },\n\n    load: function (data) {\n        if (!(data && data.length)) return this;\n\n        if (data.length < this._minEntries) {\n            for (var i = 0, len = data.length; i < len; i++) {\n                this.insert(data[i]);\n            }\n            return this;\n        }\n\n        // recursively build the tree with the given data from scratch using OMT algorithm\n        var node = this._build(data.slice(), 0, data.length - 1, 0);\n\n        if (!this.data.children.length) {\n            // save as is if tree is empty\n            this.data = node;\n\n        } else if (this.data.height === node.height) {\n            // split root if trees have the same height\n            this._splitRoot(this.data, node);\n\n        } else {\n            if (this.data.height < node.height) {\n                // swap trees if inserted one is bigger\n                var tmpNode = this.data;\n                this.data = node;\n                node = tmpNode;\n            }\n\n            // insert the small tree into the large tree at appropriate level\n            this._insert(node, this.data.height - node.height - 1, true);\n        }\n\n        return this;\n    },\n\n    insert: function (item) {\n        if (item) this._insert(item, this.data.height - 1);\n        return this;\n    },\n\n    clear: function () {\n        this.data = createNode([]);\n        return this;\n    },\n\n    remove: function (item, equalsFn) {\n        if (!item) return this;\n\n        var node = this.data,\n            bbox = this.toBBox(item),\n            path = [],\n            indexes = [],\n            i, parent, index, goingUp;\n\n        // depth-first iterative tree traversal\n        while (node || path.length) {\n\n            if (!node) { // go up\n                node = path.pop();\n                parent = path[path.length - 1];\n                i = indexes.pop();\n                goingUp = true;\n            }\n\n            if (node.leaf) { // check current node\n                index = findItem(item, node.children, equalsFn);\n\n                if (index !== -1) {\n                    // item found, remove the item and condense tree upwards\n                    node.children.splice(index, 1);\n                    path.push(node);\n                    this._condense(path);\n                    return this;\n                }\n            }\n\n            if (!goingUp && !node.leaf && contains(node, bbox)) { // go down\n                path.push(node);\n                indexes.push(i);\n                i = 0;\n                parent = node;\n                node = node.children[0];\n\n            } else if (parent) { // go right\n                i++;\n                node = parent.children[i];\n                goingUp = false;\n\n            } else node = null; // nothing found\n        }\n\n        return this;\n    },\n\n    toBBox: function (item) { return item; },\n\n    compareMinX: compareNodeMinX,\n    compareMinY: compareNodeMinY,\n\n    toJSON: function () { return this.data; },\n\n    fromJSON: function (data) {\n        this.data = data;\n        return this;\n    },\n\n    _all: function (node, result) {\n        var nodesToSearch = [];\n        while (node) {\n            if (node.leaf) result.push.apply(result, node.children);\n            else nodesToSearch.push.apply(nodesToSearch, node.children);\n\n            node = nodesToSearch.pop();\n        }\n        return result;\n    },\n\n    _build: function (items, left, right, height) {\n\n        var N = right - left + 1,\n            M = this._maxEntries,\n            node;\n\n        if (N <= M) {\n            // reached leaf level; return leaf\n            node = createNode(items.slice(left, right + 1));\n            calcBBox(node, this.toBBox);\n            return node;\n        }\n\n        if (!height) {\n            // target height of the bulk-loaded tree\n            height = Math.ceil(Math.log(N) / Math.log(M));\n\n            // target number of root entries to maximize storage utilization\n            M = Math.ceil(N / Math.pow(M, height - 1));\n        }\n\n        node = createNode([]);\n        node.leaf = false;\n        node.height = height;\n\n        // split the items into M mostly square tiles\n\n        var N2 = Math.ceil(N / M),\n            N1 = N2 * Math.ceil(Math.sqrt(M)),\n            i, j, right2, right3;\n\n        multiSelect(items, left, right, N1, this.compareMinX);\n\n        for (i = left; i <= right; i += N1) {\n\n            right2 = Math.min(i + N1 - 1, right);\n\n            multiSelect(items, i, right2, N2, this.compareMinY);\n\n            for (j = i; j <= right2; j += N2) {\n\n                right3 = Math.min(j + N2 - 1, right2);\n\n                // pack each entry recursively\n                node.children.push(this._build(items, j, right3, height - 1));\n            }\n        }\n\n        calcBBox(node, this.toBBox);\n\n        return node;\n    },\n\n    _chooseSubtree: function (bbox, node, level, path) {\n\n        var i, len, child, targetNode, area, enlargement, minArea, minEnlargement;\n\n        while (true) {\n            path.push(node);\n\n            if (node.leaf || path.length - 1 === level) break;\n\n            minArea = minEnlargement = Infinity;\n\n            for (i = 0, len = node.children.length; i < len; i++) {\n                child = node.children[i];\n                area = bboxArea(child);\n                enlargement = enlargedArea(bbox, child) - area;\n\n                // choose entry with the least area enlargement\n                if (enlargement < minEnlargement) {\n                    minEnlargement = enlargement;\n                    minArea = area < minArea ? area : minArea;\n                    targetNode = child;\n\n                } else if (enlargement === minEnlargement) {\n                    // otherwise choose one with the smallest area\n                    if (area < minArea) {\n                        minArea = area;\n                        targetNode = child;\n                    }\n                }\n            }\n\n            node = targetNode || node.children[0];\n        }\n\n        return node;\n    },\n\n    _insert: function (item, level, isNode) {\n\n        var toBBox = this.toBBox,\n            bbox = isNode ? item : toBBox(item),\n            insertPath = [];\n\n        // find the best node for accommodating the item, saving all nodes along the path too\n        var node = this._chooseSubtree(bbox, this.data, level, insertPath);\n\n        // put the item into the node\n        node.children.push(item);\n        extend(node, bbox);\n\n        // split on node overflow; propagate upwards if necessary\n        while (level >= 0) {\n            if (insertPath[level].children.length > this._maxEntries) {\n                this._split(insertPath, level);\n                level--;\n            } else break;\n        }\n\n        // adjust bboxes along the insertion path\n        this._adjustParentBBoxes(bbox, insertPath, level);\n    },\n\n    // split overflowed node into two\n    _split: function (insertPath, level) {\n\n        var node = insertPath[level],\n            M = node.children.length,\n            m = this._minEntries;\n\n        this._chooseSplitAxis(node, m, M);\n\n        var splitIndex = this._chooseSplitIndex(node, m, M);\n\n        var newNode = createNode(node.children.splice(splitIndex, node.children.length - splitIndex));\n        newNode.height = node.height;\n        newNode.leaf = node.leaf;\n\n        calcBBox(node, this.toBBox);\n        calcBBox(newNode, this.toBBox);\n\n        if (level) insertPath[level - 1].children.push(newNode);\n        else this._splitRoot(node, newNode);\n    },\n\n    _splitRoot: function (node, newNode) {\n        // split root node\n        this.data = createNode([node, newNode]);\n        this.data.height = node.height + 1;\n        this.data.leaf = false;\n        calcBBox(this.data, this.toBBox);\n    },\n\n    _chooseSplitIndex: function (node, m, M) {\n\n        var i, bbox1, bbox2, overlap, area, minOverlap, minArea, index;\n\n        minOverlap = minArea = Infinity;\n\n        for (i = m; i <= M - m; i++) {\n            bbox1 = distBBox(node, 0, i, this.toBBox);\n            bbox2 = distBBox(node, i, M, this.toBBox);\n\n            overlap = intersectionArea(bbox1, bbox2);\n            area = bboxArea(bbox1) + bboxArea(bbox2);\n\n            // choose distribution with minimum overlap\n            if (overlap < minOverlap) {\n                minOverlap = overlap;\n                index = i;\n\n                minArea = area < minArea ? area : minArea;\n\n            } else if (overlap === minOverlap) {\n                // otherwise choose distribution with minimum area\n                if (area < minArea) {\n                    minArea = area;\n                    index = i;\n                }\n            }\n        }\n\n        return index;\n    },\n\n    // sorts node children by the best axis for split\n    _chooseSplitAxis: function (node, m, M) {\n\n        var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX,\n            compareMinY = node.leaf ? this.compareMinY : compareNodeMinY,\n            xMargin = this._allDistMargin(node, m, M, compareMinX),\n            yMargin = this._allDistMargin(node, m, M, compareMinY);\n\n        // if total distributions margin value is minimal for x, sort by minX,\n        // otherwise it's already sorted by minY\n        if (xMargin < yMargin) node.children.sort(compareMinX);\n    },\n\n    // total margin of all possible split distributions where each node is at least m full\n    _allDistMargin: function (node, m, M, compare) {\n\n        node.children.sort(compare);\n\n        var toBBox = this.toBBox,\n            leftBBox = distBBox(node, 0, m, toBBox),\n            rightBBox = distBBox(node, M - m, M, toBBox),\n            margin = bboxMargin(leftBBox) + bboxMargin(rightBBox),\n            i, child;\n\n        for (i = m; i < M - m; i++) {\n            child = node.children[i];\n            extend(leftBBox, node.leaf ? toBBox(child) : child);\n            margin += bboxMargin(leftBBox);\n        }\n\n        for (i = M - m - 1; i >= m; i--) {\n            child = node.children[i];\n            extend(rightBBox, node.leaf ? toBBox(child) : child);\n            margin += bboxMargin(rightBBox);\n        }\n\n        return margin;\n    },\n\n    _adjustParentBBoxes: function (bbox, path, level) {\n        // adjust bboxes along the given tree path\n        for (var i = level; i >= 0; i--) {\n            extend(path[i], bbox);\n        }\n    },\n\n    _condense: function (path) {\n        // go through the path, removing empty nodes and updating bboxes\n        for (var i = path.length - 1, siblings; i >= 0; i--) {\n            if (path[i].children.length === 0) {\n                if (i > 0) {\n                    siblings = path[i - 1].children;\n                    siblings.splice(siblings.indexOf(path[i]), 1);\n\n                } else this.clear();\n\n            } else calcBBox(path[i], this.toBBox);\n        }\n    },\n\n    _initFormat: function (format) {\n        // data format (minX, minY, maxX, maxY accessors)\n\n        // uses eval-type function compilation instead of just accepting a toBBox function\n        // because the algorithms are very sensitive to sorting functions performance,\n        // so they should be dead simple and without inner calls\n\n        var compareArr = ['return a', ' - b', ';'];\n\n        this.compareMinX = new Function('a', 'b', compareArr.join(format[0]));\n        this.compareMinY = new Function('a', 'b', compareArr.join(format[1]));\n\n        this.toBBox = new Function('a',\n            'return {minX: a' + format[0] +\n            ', minY: a' + format[1] +\n            ', maxX: a' + format[2] +\n            ', maxY: a' + format[3] + '};');\n    }\n};\n\nfunction findItem(item, items, equalsFn) {\n    if (!equalsFn) return items.indexOf(item);\n\n    for (var i = 0; i < items.length; i++) {\n        if (equalsFn(item, items[i])) return i;\n    }\n    return -1;\n}\n\n// calculate node's bbox from bboxes of its children\nfunction calcBBox(node, toBBox) {\n    distBBox(node, 0, node.children.length, toBBox, node);\n}\n\n// min bounding rectangle of node children from k to p-1\nfunction distBBox(node, k, p, toBBox, destNode) {\n    if (!destNode) destNode = createNode(null);\n    destNode.minX = Infinity;\n    destNode.minY = Infinity;\n    destNode.maxX = -Infinity;\n    destNode.maxY = -Infinity;\n\n    for (var i = k, child; i < p; i++) {\n        child = node.children[i];\n        extend(destNode, node.leaf ? toBBox(child) : child);\n    }\n\n    return destNode;\n}\n\nfunction extend(a, b) {\n    a.minX = Math.min(a.minX, b.minX);\n    a.minY = Math.min(a.minY, b.minY);\n    a.maxX = Math.max(a.maxX, b.maxX);\n    a.maxY = Math.max(a.maxY, b.maxY);\n    return a;\n}\n\nfunction compareNodeMinX(a, b) { return a.minX - b.minX; }\nfunction compareNodeMinY(a, b) { return a.minY - b.minY; }\n\nfunction bboxArea(a)   { return (a.maxX - a.minX) * (a.maxY - a.minY); }\nfunction bboxMargin(a) { return (a.maxX - a.minX) + (a.maxY - a.minY); }\n\nfunction enlargedArea(a, b) {\n    return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) *\n           (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));\n}\n\nfunction intersectionArea(a, b) {\n    var minX = Math.max(a.minX, b.minX),\n        minY = Math.max(a.minY, b.minY),\n        maxX = Math.min(a.maxX, b.maxX),\n        maxY = Math.min(a.maxY, b.maxY);\n\n    return Math.max(0, maxX - minX) *\n           Math.max(0, maxY - minY);\n}\n\nfunction contains(a, b) {\n    return a.minX <= b.minX &&\n           a.minY <= b.minY &&\n           b.maxX <= a.maxX &&\n           b.maxY <= a.maxY;\n}\n\nfunction intersects(a, b) {\n    return b.minX <= a.maxX &&\n           b.minY <= a.maxY &&\n           b.maxX >= a.minX &&\n           b.maxY >= a.minY;\n}\n\nfunction createNode(children) {\n    return {\n        children: children,\n        height: 1,\n        leaf: true,\n        minX: Infinity,\n        minY: Infinity,\n        maxX: -Infinity,\n        maxY: -Infinity\n    };\n}\n\n// sort an array so that items come in groups of n unsorted items, with groups sorted between each other;\n// combines selection algorithm with binary divide & conquer approach\n\nfunction multiSelect(arr, left, right, n, compare) {\n    var stack = [left, right],\n        mid;\n\n    while (stack.length) {\n        right = stack.pop();\n        left = stack.pop();\n\n        if (right - left <= n) continue;\n\n        mid = left + Math.ceil((right - left) / n / 2) * n;\n        quickselect(arr, mid, left, right, compare);\n\n        stack.push(left, mid, mid, right);\n    }\n}\n","/**\n * @module ol/MapEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n\n  /**\n   * Triggered after a map frame is rendered.\n   * @event module:ol/MapEvent~MapEvent#postrender\n   * @api\n   */\n  POSTRENDER: 'postrender',\n\n  /**\n   * Triggered when the map starts moving.\n   * @event module:ol/MapEvent~MapEvent#movestart\n   * @api\n   */\n  MOVESTART: 'movestart',\n\n  /**\n   * Triggered after the map is moved.\n   * @event module:ol/MapEvent~MapEvent#moveend\n   * @api\n   */\n  MOVEEND: 'moveend'\n\n};\n\n//# sourceMappingURL=MapEventType.js.map","/**\n * @module ol/Observable\n */\nimport {listen, unlistenByKey, unlisten, listenOnce} from './events.js';\nimport EventTarget from './events/Target.js';\nimport EventType from './events/EventType.js';\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * An event target providing convenient methods for listener registration\n * and unregistration. A generic `change` event is always available through\n * {@link module:ol/Observable~Observable#changed}.\n *\n * @fires import(\"./events/Event.js\").Event\n * @api\n */\nvar Observable = /*@__PURE__*/(function (EventTarget) {\n  function Observable() {\n\n    EventTarget.call(this);\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.revision_ = 0;\n\n  }\n\n  if ( EventTarget ) Observable.__proto__ = EventTarget;\n  Observable.prototype = Object.create( EventTarget && EventTarget.prototype );\n  Observable.prototype.constructor = Observable;\n\n  /**\n   * Increases the revision counter and dispatches a 'change' event.\n   * @api\n   */\n  Observable.prototype.changed = function changed () {\n    ++this.revision_;\n    this.dispatchEvent(EventType.CHANGE);\n  };\n\n  /**\n   * Get the version number for this object.  Each time the object is modified,\n   * its version number will be incremented.\n   * @return {number} Revision.\n   * @api\n   */\n  Observable.prototype.getRevision = function getRevision () {\n    return this.revision_;\n  };\n\n  /**\n   * Listen for a certain type of event.\n   * @param {string|Array<string>} type The event type or array of event types.\n   * @param {function(?): ?} listener The listener function.\n   * @return {import(\"./events.js\").EventsKey|Array<import(\"./events.js\").EventsKey>} Unique key for the listener. If\n   *     called with an array of event types as the first argument, the return\n   *     will be an array of keys.\n   * @api\n   */\n  Observable.prototype.on = function on (type, listener) {\n    if (Array.isArray(type)) {\n      var len = type.length;\n      var keys = new Array(len);\n      for (var i = 0; i < len; ++i) {\n        keys[i] = listen(this, type[i], listener);\n      }\n      return keys;\n    } else {\n      return listen(this, /** @type {string} */ (type), listener);\n    }\n  };\n\n  /**\n   * Listen once for a certain type of event.\n   * @param {string|Array<string>} type The event type or array of event types.\n   * @param {function(?): ?} listener The listener function.\n   * @return {import(\"./events.js\").EventsKey|Array<import(\"./events.js\").EventsKey>} Unique key for the listener. If\n   *     called with an array of event types as the first argument, the return\n   *     will be an array of keys.\n   * @api\n   */\n  Observable.prototype.once = function once (type, listener) {\n    if (Array.isArray(type)) {\n      var len = type.length;\n      var keys = new Array(len);\n      for (var i = 0; i < len; ++i) {\n        keys[i] = listenOnce(this, type[i], listener);\n      }\n      return keys;\n    } else {\n      return listenOnce(this, /** @type {string} */ (type), listener);\n    }\n  };\n\n  /**\n   * Unlisten for a certain type of event.\n   * @param {string|Array<string>} type The event type or array of event types.\n   * @param {function(?): ?} listener The listener function.\n   * @api\n   */\n  Observable.prototype.un = function un (type, listener) {\n    if (Array.isArray(type)) {\n      for (var i = 0, ii = type.length; i < ii; ++i) {\n        unlisten(this, type[i], listener);\n      }\n      return;\n    } else {\n      unlisten(this, /** @type {string} */ (type), listener);\n    }\n  };\n\n  return Observable;\n}(EventTarget));\n\n\n/**\n * Removes an event listener using the key returned by `on()` or `once()`.\n * @param {import(\"./events.js\").EventsKey|Array<import(\"./events.js\").EventsKey>} key The key returned by `on()`\n *     or `once()` (or an array of keys).\n * @api\n */\nexport function unByKey(key) {\n  if (Array.isArray(key)) {\n    for (var i = 0, ii = key.length; i < ii; ++i) {\n      unlistenByKey(key[i]);\n    }\n  } else {\n    unlistenByKey(/** @type {import(\"./events.js\").EventsKey} */ (key));\n  }\n}\n\n\nexport default Observable;\n\n//# sourceMappingURL=Observable.js.map","(function (global, factory) {\n\ttypeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('ol/control/Control'), require('ol/Observable')) :\n\ttypeof define === 'function' && define.amd ? define(['ol/control/Control', 'ol/Observable'], factory) :\n\t(global.LayerSwitcher = factory(global.ol.control.Control,global.ol.Observable));\n}(this, (function (Control,ol_Observable) { 'use strict';\n\nControl = 'default' in Control ? Control['default'] : Control;\n\nvar classCallCheck = function (instance, Constructor) {\n  if (!(instance instanceof Constructor)) {\n    throw new TypeError(\"Cannot call a class as a function\");\n  }\n};\n\nvar createClass = function () {\n  function defineProperties(target, props) {\n    for (var i = 0; i < props.length; i++) {\n      var descriptor = props[i];\n      descriptor.enumerable = descriptor.enumerable || false;\n      descriptor.configurable = true;\n      if (\"value\" in descriptor) descriptor.writable = true;\n      Object.defineProperty(target, descriptor.key, descriptor);\n    }\n  }\n\n  return function (Constructor, protoProps, staticProps) {\n    if (protoProps) defineProperties(Constructor.prototype, protoProps);\n    if (staticProps) defineProperties(Constructor, staticProps);\n    return Constructor;\n  };\n}();\n\n\n\n\n\n\n\nvar get = function get(object, property, receiver) {\n  if (object === null) object = Function.prototype;\n  var desc = Object.getOwnPropertyDescriptor(object, property);\n\n  if (desc === undefined) {\n    var parent = Object.getPrototypeOf(object);\n\n    if (parent === null) {\n      return undefined;\n    } else {\n      return get(parent, property, receiver);\n    }\n  } else if (\"value\" in desc) {\n    return desc.value;\n  } else {\n    var getter = desc.get;\n\n    if (getter === undefined) {\n      return undefined;\n    }\n\n    return getter.call(receiver);\n  }\n};\n\nvar inherits = function (subClass, superClass) {\n  if (typeof superClass !== \"function\" && superClass !== null) {\n    throw new TypeError(\"Super expression must either be null or a function, not \" + typeof superClass);\n  }\n\n  subClass.prototype = Object.create(superClass && superClass.prototype, {\n    constructor: {\n      value: subClass,\n      enumerable: false,\n      writable: true,\n      configurable: true\n    }\n  });\n  if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;\n};\n\n\n\n\n\n\n\n\n\n\n\nvar possibleConstructorReturn = function (self, call) {\n  if (!self) {\n    throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n  }\n\n  return call && (typeof call === \"object\" || typeof call === \"function\") ? call : self;\n};\n\nvar CSS_PREFIX = 'layer-switcher-';\n\n/**\n * OpenLayers Layer Switcher Control.\n * See [the examples](./examples) for usage.\n * @constructor\n * @extends {ol/control/Control~Control}\n * @param {Object} opt_options Control options, extends ol/control/Control~Control#options adding:\n * @param {String} opt_options.tipLabel the button tooltip.\n * @param {String} opt_options.groupSelectStyle either `'none'` - groups don't get a checkbox,\n *   `'children'` (default) groups have a checkbox and affect child visibility or\n *   `'group'` groups have a checkbox but do not alter child visibility (like QGIS).\n */\n\nvar LayerSwitcher = function (_Control) {\n    inherits(LayerSwitcher, _Control);\n\n    function LayerSwitcher(opt_options) {\n        classCallCheck(this, LayerSwitcher);\n\n\n        var options = opt_options || {};\n\n        var tipLabel = options.tipLabel ? options.tipLabel : 'Legend';\n\n        var element = document.createElement('div');\n\n        var _this = possibleConstructorReturn(this, (LayerSwitcher.__proto__ || Object.getPrototypeOf(LayerSwitcher)).call(this, { element: element, target: options.target }));\n\n        _this.groupSelectStyle = ['none', 'children', 'group'].indexOf(options.groupSelectStyle) >= 0 ? options.groupSelectStyle : 'children';\n\n        _this.mapListeners = [];\n\n        _this.hiddenClassName = 'ol-unselectable ol-control layer-switcher';\n        if (LayerSwitcher.isTouchDevice_()) {\n            _this.hiddenClassName += ' touch';\n        }\n        _this.shownClassName = 'shown';\n\n        element.className = _this.hiddenClassName;\n\n        var button = document.createElement('button');\n        button.setAttribute('title', tipLabel);\n        element.appendChild(button);\n\n        _this.panel = document.createElement('div');\n        _this.panel.className = 'panel';\n        element.appendChild(_this.panel);\n        LayerSwitcher.enableTouchScroll_(_this.panel);\n\n        var this_ = _this;\n\n        button.onmouseover = function (e) {\n            this_.showPanel();\n        };\n\n        button.onclick = function (e) {\n            e = e || window.event;\n            this_.showPanel();\n            e.preventDefault();\n        };\n\n        this_.panel.onmouseout = function (e) {\n            e = e || window.event;\n            if (!this_.panel.contains(e.toElement || e.relatedTarget)) {\n                this_.hidePanel();\n            }\n        };\n\n        return _this;\n    }\n\n    /**\n    * Set the map instance the control is associated with.\n    * @param {ol/Map~Map} map The map instance.\n    */\n\n\n    createClass(LayerSwitcher, [{\n        key: 'setMap',\n        value: function setMap(map) {\n            // Clean up listeners associated with the previous map\n            for (var i = 0, key; i < this.mapListeners.length; i++) {\n                ol_Observable.unByKey(this.mapListeners[i]);\n            }\n            this.mapListeners.length = 0;\n            // Wire up listeners etc. and store reference to new map\n            get(LayerSwitcher.prototype.__proto__ || Object.getPrototypeOf(LayerSwitcher.prototype), 'setMap', this).call(this, map);\n            if (map) {\n                var this_ = this;\n                this.mapListeners.push(map.on('pointerdown', function () {\n                    this_.hidePanel();\n                }));\n                this.renderPanel();\n            }\n        }\n\n        /**\n        * Show the layer panel.\n        */\n\n    }, {\n        key: 'showPanel',\n        value: function showPanel() {\n            if (!this.element.classList.contains(this.shownClassName)) {\n                this.element.classList.add(this.shownClassName);\n                this.renderPanel();\n            }\n        }\n\n        /**\n        * Hide the layer panel.\n        */\n\n    }, {\n        key: 'hidePanel',\n        value: function hidePanel() {\n            if (this.element.classList.contains(this.shownClassName)) {\n                this.element.classList.remove(this.shownClassName);\n            }\n        }\n\n        /**\n        * Re-draw the layer panel to represent the current state of the layers.\n        */\n\n    }, {\n        key: 'renderPanel',\n        value: function renderPanel() {\n            LayerSwitcher.renderPanel(this.getMap(), this.panel, {\n                groupSelectStyle: this.groupSelectStyle\n            });\n        }\n\n        /**\n        * **Static** Re-draw the layer panel to represent the current state of the layers.\n        * @param {ol/Map~Map} map The OpenLayers Map instance to render layers for\n        * @param {Element} panel The DOM Element into which the layer tree will be rendered\n        */\n\n    }], [{\n        key: 'renderPanel',\n        value: function renderPanel(map, panel, options) {\n\n            options = options || {};\n\n            LayerSwitcher.ensureTopVisibleBaseLayerShown_(map);\n\n            while (panel.firstChild) {\n                panel.removeChild(panel.firstChild);\n            }\n\n            // Reset indeterminate state for all layers and groups before\n            // applying based on groupSelectStyle\n            LayerSwitcher.forEachRecursive(map, function (l, idx, a) {\n                l.set('indeterminate', false);\n            });\n\n            if (options.groupSelectStyle === 'children' || options.groupSelectStyle === 'none') {\n                // Set visibile and indeterminate state of groups based on\n                // their children's visibility\n                LayerSwitcher.setGroupVisibility(map);\n            } else if (options.groupSelectStyle === 'group') {\n                // Set child indetermiate state based on their parent's visibility\n                LayerSwitcher.setChildVisibility(map);\n            }\n\n            var ul = document.createElement('ul');\n            panel.appendChild(ul);\n            // passing two map arguments instead of lyr as we're passing the map as the root of the layers tree\n            LayerSwitcher.renderLayers_(map, map, ul, options, function render(changedLyr) {\n                // console.log('render');\n                LayerSwitcher.renderPanel(map, panel, options);\n            });\n        }\n    }, {\n        key: 'isBaseGroup',\n        value: function isBaseGroup(lyr) {\n            var lyrs = lyr.getLayers ? lyr.getLayers().getArray() : [];\n            return lyrs.length && lyrs[0].get('type') === 'base';\n        }\n    }, {\n        key: 'setGroupVisibility',\n        value: function setGroupVisibility(map) {\n            // Get a list of groups, with the deepest first\n            var groups = LayerSwitcher.getGroupsAndLayers(map, function (l) {\n                return l.getLayers && !l.get('combine') && !LayerSwitcher.isBaseGroup(l);\n            }).reverse();\n            // console.log(groups.map(g => g.get('title')));\n            groups.forEach(function (group) {\n                // TODO Can we use getLayersArray, is it public in the esm build?\n                var descendantVisibility = group.getLayersArray().map(function (l) {\n                    var state = l.getVisible();\n                    // console.log('>', l.get('title'), state);\n                    return state;\n                });\n                // console.log(descendantVisibility);\n                if (descendantVisibility.every(function (v) {\n                    return v === true;\n                })) {\n                    group.setVisible(true);\n                    group.set('indeterminate', false);\n                } else if (descendantVisibility.every(function (v) {\n                    return v === false;\n                })) {\n                    group.setVisible(false);\n                    group.set('indeterminate', false);\n                } else {\n                    group.setVisible(true);\n                    group.set('indeterminate', true);\n                }\n            });\n        }\n    }, {\n        key: 'setChildVisibility',\n        value: function setChildVisibility(map) {\n            // console.log('setChildVisibility');\n            var groups = LayerSwitcher.getGroupsAndLayers(map, function (l) {\n                return l.getLayers && !l.get('combine') && !LayerSwitcher.isBaseGroup(l);\n            });\n            groups.forEach(function (group) {\n                // console.log(group.get('title'));\n                var groupVisible = group.getVisible();\n                var groupIndeterminate = group.get('indeterminate');\n                group.getLayers().getArray().forEach(function (l) {\n                    // console.log('>', l.get('title'));\n                    l.set('indeterminate', false);\n                    if ((!groupVisible || groupIndeterminate) && l.getVisible()) {\n                        l.set('indeterminate', true);\n                    }\n                });\n            });\n        }\n\n        /**\n        * **Static** Ensure only the top-most base layer is visible if more than one is visible.\n        * @param {ol/Map~Map} map The map instance.\n        * @private\n        */\n\n    }, {\n        key: 'ensureTopVisibleBaseLayerShown_',\n        value: function ensureTopVisibleBaseLayerShown_(map) {\n            var lastVisibleBaseLyr;\n            LayerSwitcher.forEachRecursive(map, function (l, idx, a) {\n                if (l.get('type') === 'base' && l.getVisible()) {\n                    lastVisibleBaseLyr = l;\n                }\n            });\n            if (lastVisibleBaseLyr) LayerSwitcher.setVisible_(map, lastVisibleBaseLyr, true);\n        }\n    }, {\n        key: 'getGroupsAndLayers',\n        value: function getGroupsAndLayers(lyr, filterFn) {\n            var layers = [];\n            filterFn = filterFn || function (l, idx, a) {\n                return true;\n            };\n            LayerSwitcher.forEachRecursive(lyr, function (l, idx, a) {\n                if (l.get('title')) {\n                    if (filterFn(l, idx, a)) {\n                        layers.push(l);\n                    }\n                }\n            });\n            return layers;\n        }\n\n        /**\n        * **Static** Toggle the visible state of a layer.\n        * Takes care of hiding other layers in the same exclusive group if the layer\n        * is toggle to visible.\n        * @private\n        * @param {ol/Map~Map} map The map instance.\n        * @param {ol/layer/Base~BaseLayer} The layer whose visibility will be toggled.\n        */\n\n    }, {\n        key: 'setVisible_',\n        value: function setVisible_(map, lyr, visible, groupSelectStyle) {\n            // console.log(lyr.get('title'), visible, groupSelectStyle);\n            lyr.setVisible(visible);\n            if (visible && lyr.get('type') === 'base') {\n                // Hide all other base layers regardless of grouping\n                LayerSwitcher.forEachRecursive(map, function (l, idx, a) {\n                    if (l != lyr && l.get('type') === 'base') {\n                        l.setVisible(false);\n                    }\n                });\n            }\n            if (lyr.getLayers && !lyr.get('combine') && groupSelectStyle === 'children') {\n                lyr.getLayers().forEach(function (l) {\n                    LayerSwitcher.setVisible_(map, l, lyr.getVisible(), groupSelectStyle);\n                });\n            }\n        }\n\n        /**\n        * **Static** Render all layers that are children of a group.\n        * @private\n        * @param {ol/Map~Map} map The map instance.\n        * @param {ol/layer/Base~BaseLayer} lyr Layer to be rendered (should have a title property).\n        * @param {Number} idx Position in parent group list.\n        */\n\n    }, {\n        key: 'renderLayer_',\n        value: function renderLayer_(map, lyr, idx, options, render) {\n\n            var li = document.createElement('li');\n\n            var lyrTitle = lyr.get('title');\n\n            var checkboxId = LayerSwitcher.uuid();\n\n            var label = document.createElement('label');\n\n            if (lyr.getLayers && !lyr.get('combine')) {\n\n                var isBaseGroup = LayerSwitcher.isBaseGroup(lyr);\n\n                li.classList.add('group');\n                if (isBaseGroup) {\n                    li.classList.add(CSS_PREFIX + 'base-group');\n                }\n\n                // Group folding\n                if (lyr.get('fold')) {\n                    li.classList.add(CSS_PREFIX + 'fold');\n                    li.classList.add(CSS_PREFIX + lyr.get('fold'));\n                    var btn = document.createElement('button');\n                    btn.onclick = function (e) {\n                        LayerSwitcher.toggleFold_(lyr, li);\n                    };\n                    li.appendChild(btn);\n                }\n\n                if (!isBaseGroup && options.groupSelectStyle != 'none') {\n                    var _input = document.createElement('input');\n                    _input.type = 'checkbox';\n                    _input.id = checkboxId;\n                    _input.checked = lyr.getVisible();\n                    _input.indeterminate = lyr.get('indeterminate');\n                    _input.onchange = function (e) {\n                        LayerSwitcher.setVisible_(map, lyr, e.target.checked, options.groupSelectStyle);\n                        render(lyr);\n                    };\n                    li.appendChild(_input);\n                    label.htmlFor = checkboxId;\n                }\n\n                label.innerHTML = lyrTitle;\n                li.appendChild(label);\n                var ul = document.createElement('ul');\n                li.appendChild(ul);\n\n                LayerSwitcher.renderLayers_(map, lyr, ul, options, render);\n            } else {\n\n                li.className = 'layer';\n                var input = document.createElement('input');\n                if (lyr.get('type') === 'base') {\n                    input.type = 'radio';\n                    input.name = 'base';\n                } else {\n                    input.type = 'checkbox';\n                }\n                input.id = checkboxId;\n                input.checked = lyr.get('visible');\n                input.indeterminate = lyr.get('indeterminate');\n                input.onchange = function (e) {\n                    LayerSwitcher.setVisible_(map, lyr, e.target.checked, options.groupSelectStyle);\n                    render(lyr);\n                };\n                li.appendChild(input);\n\n                label.htmlFor = checkboxId;\n                label.innerHTML = lyrTitle;\n\n                var rsl = map.getView().getResolution();\n                if (rsl > lyr.getMaxResolution() || rsl < lyr.getMinResolution()) {\n                    label.className += ' disabled';\n                }\n\n                li.appendChild(label);\n            }\n\n            return li;\n        }\n\n        /**\n        * **Static** Render all layers that are children of a group.\n        * @private\n        * @param {ol/Map~Map} map The map instance.\n        * @param {ol/layer/Group~LayerGroup} lyr Group layer whose children will be rendered.\n        * @param {Element} elm DOM element that children will be appended to.\n        */\n\n    }, {\n        key: 'renderLayers_',\n        value: function renderLayers_(map, lyr, elm, options, render) {\n            var lyrs = lyr.getLayers().getArray().slice().reverse();\n            for (var i = 0, l; i < lyrs.length; i++) {\n                l = lyrs[i];\n                if (l.get('title')) {\n                    elm.appendChild(LayerSwitcher.renderLayer_(map, l, i, options, render));\n                }\n            }\n        }\n\n        /**\n        * **Static** Call the supplied function for each layer in the passed layer group\n        * recursing nested groups.\n        * @param {ol/layer/Group~LayerGroup} lyr The layer group to start iterating from.\n        * @param {Function} fn Callback which will be called for each `ol/layer/Base~BaseLayer`\n        * found under `lyr`. The signature for `fn` is the same as `ol/Collection~Collection#forEach`\n        */\n\n    }, {\n        key: 'forEachRecursive',\n        value: function forEachRecursive(lyr, fn) {\n            lyr.getLayers().forEach(function (lyr, idx, a) {\n                fn(lyr, idx, a);\n                if (lyr.getLayers) {\n                    LayerSwitcher.forEachRecursive(lyr, fn);\n                }\n            });\n        }\n\n        /**\n        * **Static** Generate a UUID\n        * Adapted from http://stackoverflow.com/a/2117523/526860\n        * @returns {String} UUID\n        */\n\n    }, {\n        key: 'uuid',\n        value: function uuid() {\n            return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {\n                var r = Math.random() * 16 | 0,\n                    v = c == 'x' ? r : r & 0x3 | 0x8;\n                return v.toString(16);\n            });\n        }\n\n        /**\n        * @private\n        * @desc Apply workaround to enable scrolling of overflowing content within an\n        * element. Adapted from https://gist.github.com/chrismbarr/4107472\n        */\n\n    }, {\n        key: 'enableTouchScroll_',\n        value: function enableTouchScroll_(elm) {\n            if (LayerSwitcher.isTouchDevice_()) {\n                var scrollStartPos = 0;\n                elm.addEventListener(\"touchstart\", function (event) {\n                    scrollStartPos = this.scrollTop + event.touches[0].pageY;\n                }, false);\n                elm.addEventListener(\"touchmove\", function (event) {\n                    this.scrollTop = scrollStartPos - event.touches[0].pageY;\n                }, false);\n            }\n        }\n\n        /**\n        * @private\n        * @desc Determine if the current browser supports touch events. Adapted from\n        * https://gist.github.com/chrismbarr/4107472\n        */\n\n    }, {\n        key: 'isTouchDevice_',\n        value: function isTouchDevice_() {\n            try {\n                document.createEvent(\"TouchEvent\");\n                return true;\n            } catch (e) {\n                return false;\n            }\n        }\n\n        /**\n        * Fold/unfold layer group\n        * @private\n        */\n\n    }, {\n        key: 'toggleFold_',\n        value: function toggleFold_(lyr, li) {\n            li.classList.remove(CSS_PREFIX + lyr.get('fold'));\n            lyr.set('fold', lyr.get('fold') === 'open' ? 'close' : 'open');\n            li.classList.add(CSS_PREFIX + lyr.get('fold'));\n        }\n    }]);\n    return LayerSwitcher;\n}(Control);\n\nif (window.ol && window.ol.control) {\n    window.ol.control.LayerSwitcher = LayerSwitcher;\n}\n\nreturn LayerSwitcher;\n\n})));\n","(function (global, factory) {\n\ttypeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :\n\ttypeof define === 'function' && define.amd ? define(factory) :\n\t(global.quickselect = factory());\n}(this, (function () { 'use strict';\n\nfunction quickselect(arr, k, left, right, compare) {\n    quickselectStep(arr, k, left || 0, right || (arr.length - 1), compare || defaultCompare);\n}\n\nfunction quickselectStep(arr, k, left, right, compare) {\n\n    while (right > left) {\n        if (right - left > 600) {\n            var n = right - left + 1;\n            var m = k - left + 1;\n            var z = Math.log(n);\n            var s = 0.5 * Math.exp(2 * z / 3);\n            var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);\n            var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));\n            var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));\n            quickselectStep(arr, k, newLeft, newRight, compare);\n        }\n\n        var t = arr[k];\n        var i = left;\n        var j = right;\n\n        swap(arr, left, k);\n        if (compare(arr[right], t) > 0) swap(arr, left, right);\n\n        while (i < j) {\n            swap(arr, i, j);\n            i++;\n            j--;\n            while (compare(arr[i], t) < 0) i++;\n            while (compare(arr[j], t) > 0) j--;\n        }\n\n        if (compare(arr[left], t) === 0) swap(arr, left, j);\n        else {\n            j++;\n            swap(arr, j, right);\n        }\n\n        if (j <= k) left = j + 1;\n        if (k <= j) right = j - 1;\n    }\n}\n\nfunction swap(arr, i, j) {\n    var tmp = arr[i];\n    arr[i] = arr[j];\n    arr[j] = tmp;\n}\n\nfunction defaultCompare(a, b) {\n    return a < b ? -1 : a > b ? 1 : 0;\n}\n\nreturn quickselect;\n\n})));\n","// extracted by mini-css-extract-plugin","/**\n * @module ol/AssertionError\n */\nimport {VERSION} from './util.js';\n\n/**\n * Error object thrown when an assertion failed. This is an ECMA-262 Error,\n * extended with a `code` property.\n * See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error.\n */\nvar AssertionError = /*@__PURE__*/(function (Error) {\n  function AssertionError(code) {\n    var path = VERSION === 'latest' ? VERSION : 'v' + VERSION.split('-')[0];\n    var message = 'Assertion failed. See https://openlayers.org/en/' + path +\n    '/doc/errors/#' + code + ' for details.';\n\n    Error.call(this, message);\n\n    /**\n     * Error code. The meaning of the code can be found on\n     * https://openlayers.org/en/latest/doc/errors/ (replace `latest` with\n     * the version found in the OpenLayers script's header comment if a version\n     * other than the latest is used).\n     * @type {number}\n     * @api\n     */\n    this.code = code;\n\n    /**\n     * @type {string}\n     */\n    this.name = 'AssertionError';\n\n    // Re-assign message, see https://github.com/Rich-Harris/buble/issues/40\n    this.message = message;\n  }\n\n  if ( Error ) AssertionError.__proto__ = Error;\n  AssertionError.prototype = Object.create( Error && Error.prototype );\n  AssertionError.prototype.constructor = AssertionError;\n\n  return AssertionError;\n}(Error));\n\nexport default AssertionError;\n\n//# sourceMappingURL=AssertionError.js.map","/**\n * @module ol/CollectionEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  /**\n   * Triggered when an item is added to the collection.\n   * @event module:ol/Collection.CollectionEvent#add\n   * @api\n   */\n  ADD: 'add',\n  /**\n   * Triggered when an item is removed from the collection.\n   * @event module:ol/Collection.CollectionEvent#remove\n   * @api\n   */\n  REMOVE: 'remove'\n};\n\n//# sourceMappingURL=CollectionEventType.js.map","/**\n * @module ol/Collection\n */\nimport AssertionError from './AssertionError.js';\nimport CollectionEventType from './CollectionEventType.js';\nimport BaseObject from './Object.js';\nimport Event from './events/Event.js';\n\n\n/**\n * @enum {string}\n * @private\n */\nvar Property = {\n  LENGTH: 'length'\n};\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/Collection~Collection} instances are instances of this\n * type.\n */\nexport var CollectionEvent = /*@__PURE__*/(function (Event) {\n  function CollectionEvent(type, opt_element) {\n    Event.call(this, type);\n\n    /**\n     * The element that is added to or removed from the collection.\n     * @type {*}\n     * @api\n     */\n    this.element = opt_element;\n\n  }\n\n  if ( Event ) CollectionEvent.__proto__ = Event;\n  CollectionEvent.prototype = Object.create( Event && Event.prototype );\n  CollectionEvent.prototype.constructor = CollectionEvent;\n\n  return CollectionEvent;\n}(Event));\n\n\n/**\n * @typedef {Object} Options\n * @property {boolean} [unique=false] Disallow the same item from being added to\n * the collection twice.\n */\n\n/**\n * @classdesc\n * An expanded version of standard JS Array, adding convenience methods for\n * manipulation. Add and remove changes to the Collection trigger a Collection\n * event. Note that this does not cover changes to the objects _within_ the\n * Collection; they trigger events on the appropriate object, not on the\n * Collection as a whole.\n *\n * @fires CollectionEvent\n *\n * @template T\n * @api\n */\nvar Collection = /*@__PURE__*/(function (BaseObject) {\n  function Collection(opt_array, opt_options) {\n\n    BaseObject.call(this);\n\n    var options = opt_options || {};\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.unique_ = !!options.unique;\n\n    /**\n     * @private\n     * @type {!Array<T>}\n     */\n    this.array_ = opt_array ? opt_array : [];\n\n    if (this.unique_) {\n      for (var i = 0, ii = this.array_.length; i < ii; ++i) {\n        this.assertUnique_(this.array_[i], i);\n      }\n    }\n\n    this.updateLength_();\n\n  }\n\n  if ( BaseObject ) Collection.__proto__ = BaseObject;\n  Collection.prototype = Object.create( BaseObject && BaseObject.prototype );\n  Collection.prototype.constructor = Collection;\n\n  /**\n   * Remove all elements from the collection.\n   * @api\n   */\n  Collection.prototype.clear = function clear () {\n    while (this.getLength() > 0) {\n      this.pop();\n    }\n  };\n\n  /**\n   * Add elements to the collection.  This pushes each item in the provided array\n   * to the end of the collection.\n   * @param {!Array<T>} arr Array.\n   * @return {Collection<T>} This collection.\n   * @api\n   */\n  Collection.prototype.extend = function extend (arr) {\n    for (var i = 0, ii = arr.length; i < ii; ++i) {\n      this.push(arr[i]);\n    }\n    return this;\n  };\n\n  /**\n   * Iterate over each element, calling the provided callback.\n   * @param {function(T, number, Array<T>): *} f The function to call\n   *     for every element. This function takes 3 arguments (the element, the\n   *     index and the array). The return value is ignored.\n   * @api\n   */\n  Collection.prototype.forEach = function forEach (f) {\n    var array = this.array_;\n    for (var i = 0, ii = array.length; i < ii; ++i) {\n      f(array[i], i, array);\n    }\n  };\n\n  /**\n   * Get a reference to the underlying Array object. Warning: if the array\n   * is mutated, no events will be dispatched by the collection, and the\n   * collection's \"length\" property won't be in sync with the actual length\n   * of the array.\n   * @return {!Array<T>} Array.\n   * @api\n   */\n  Collection.prototype.getArray = function getArray () {\n    return this.array_;\n  };\n\n  /**\n   * Get the element at the provided index.\n   * @param {number} index Index.\n   * @return {T} Element.\n   * @api\n   */\n  Collection.prototype.item = function item (index) {\n    return this.array_[index];\n  };\n\n  /**\n   * Get the length of this collection.\n   * @return {number} The length of the array.\n   * @observable\n   * @api\n   */\n  Collection.prototype.getLength = function getLength () {\n    return this.get(Property.LENGTH);\n  };\n\n  /**\n   * Insert an element at the provided index.\n   * @param {number} index Index.\n   * @param {T} elem Element.\n   * @api\n   */\n  Collection.prototype.insertAt = function insertAt (index, elem) {\n    if (this.unique_) {\n      this.assertUnique_(elem);\n    }\n    this.array_.splice(index, 0, elem);\n    this.updateLength_();\n    this.dispatchEvent(\n      new CollectionEvent(CollectionEventType.ADD, elem));\n  };\n\n  /**\n   * Remove the last element of the collection and return it.\n   * Return `undefined` if the collection is empty.\n   * @return {T|undefined} Element.\n   * @api\n   */\n  Collection.prototype.pop = function pop () {\n    return this.removeAt(this.getLength() - 1);\n  };\n\n  /**\n   * Insert the provided element at the end of the collection.\n   * @param {T} elem Element.\n   * @return {number} New length of the collection.\n   * @api\n   */\n  Collection.prototype.push = function push (elem) {\n    if (this.unique_) {\n      this.assertUnique_(elem);\n    }\n    var n = this.getLength();\n    this.insertAt(n, elem);\n    return this.getLength();\n  };\n\n  /**\n   * Remove the first occurrence of an element from the collection.\n   * @param {T} elem Element.\n   * @return {T|undefined} The removed element or undefined if none found.\n   * @api\n   */\n  Collection.prototype.remove = function remove (elem) {\n    var arr = this.array_;\n    for (var i = 0, ii = arr.length; i < ii; ++i) {\n      if (arr[i] === elem) {\n        return this.removeAt(i);\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * Remove the element at the provided index and return it.\n   * Return `undefined` if the collection does not contain this index.\n   * @param {number} index Index.\n   * @return {T|undefined} Value.\n   * @api\n   */\n  Collection.prototype.removeAt = function removeAt (index) {\n    var prev = this.array_[index];\n    this.array_.splice(index, 1);\n    this.updateLength_();\n    this.dispatchEvent(new CollectionEvent(CollectionEventType.REMOVE, prev));\n    return prev;\n  };\n\n  /**\n   * Set the element at the provided index.\n   * @param {number} index Index.\n   * @param {T} elem Element.\n   * @api\n   */\n  Collection.prototype.setAt = function setAt (index, elem) {\n    var n = this.getLength();\n    if (index < n) {\n      if (this.unique_) {\n        this.assertUnique_(elem, index);\n      }\n      var prev = this.array_[index];\n      this.array_[index] = elem;\n      this.dispatchEvent(\n        new CollectionEvent(CollectionEventType.REMOVE, prev));\n      this.dispatchEvent(\n        new CollectionEvent(CollectionEventType.ADD, elem));\n    } else {\n      for (var j = n; j < index; ++j) {\n        this.insertAt(j, undefined);\n      }\n      this.insertAt(index, elem);\n    }\n  };\n\n  /**\n   * @private\n   */\n  Collection.prototype.updateLength_ = function updateLength_ () {\n    this.set(Property.LENGTH, this.array_.length);\n  };\n\n  /**\n   * @private\n   * @param {T} elem Element.\n   * @param {number=} opt_except Optional index to ignore.\n   */\n  Collection.prototype.assertUnique_ = function assertUnique_ (elem, opt_except) {\n    for (var i = 0, ii = this.array_.length; i < ii; ++i) {\n      if (this.array_[i] === elem && i !== opt_except) {\n        throw new AssertionError(58);\n      }\n    }\n  };\n\n  return Collection;\n}(BaseObject));\n\n\nexport default Collection;\n\n//# sourceMappingURL=Collection.js.map","/**\n * @module ol/MapEvent\n */\nimport Event from './events/Event.js';\n\n/**\n * @classdesc\n * Events emitted as map events are instances of this type.\n * See {@link module:ol/PluggableMap~PluggableMap} for which events trigger a map event.\n */\nvar MapEvent = /*@__PURE__*/(function (Event) {\n  function MapEvent(type, map, opt_frameState) {\n\n    Event.call(this, type);\n\n    /**\n     * The map where the event occurred.\n     * @type {import(\"./PluggableMap.js\").default}\n     * @api\n     */\n    this.map = map;\n\n    /**\n     * The frame state at the time of the event.\n     * @type {?import(\"./PluggableMap.js\").FrameState}\n     * @api\n     */\n    this.frameState = opt_frameState !== undefined ? opt_frameState : null;\n\n  }\n\n  if ( Event ) MapEvent.__proto__ = Event;\n  MapEvent.prototype = Object.create( Event && Event.prototype );\n  MapEvent.prototype.constructor = MapEvent;\n\n  return MapEvent;\n}(Event));\n\nexport default MapEvent;\n\n//# sourceMappingURL=MapEvent.js.map","/**\n * @module ol/MapBrowserEvent\n */\nimport MapEvent from './MapEvent.js';\n\n/**\n * @classdesc\n * Events emitted as map browser events are instances of this type.\n * See {@link module:ol/PluggableMap~PluggableMap} for which events trigger a map browser event.\n */\nvar MapBrowserEvent = /*@__PURE__*/(function (MapEvent) {\n  function MapBrowserEvent(type, map, browserEvent, opt_dragging, opt_frameState) {\n\n    MapEvent.call(this, type, map, opt_frameState);\n\n    /**\n     * The original browser event.\n     * @const\n     * @type {Event}\n     * @api\n     */\n    this.originalEvent = browserEvent;\n\n    /**\n     * The map pixel relative to the viewport corresponding to the original browser event.\n     * @type {import(\"./pixel.js\").Pixel}\n     * @api\n     */\n    this.pixel = map.getEventPixel(browserEvent);\n\n    /**\n     * The coordinate in view projection corresponding to the original browser event.\n     * @type {import(\"./coordinate.js\").Coordinate}\n     * @api\n     */\n    this.coordinate = map.getCoordinateFromPixel(this.pixel);\n\n    /**\n     * Indicates if the map is currently being dragged. Only set for\n     * `POINTERDRAG` and `POINTERMOVE` events. Default is `false`.\n     *\n     * @type {boolean}\n     * @api\n     */\n    this.dragging = opt_dragging !== undefined ? opt_dragging : false;\n\n  }\n\n  if ( MapEvent ) MapBrowserEvent.__proto__ = MapEvent;\n  MapBrowserEvent.prototype = Object.create( MapEvent && MapEvent.prototype );\n  MapBrowserEvent.prototype.constructor = MapBrowserEvent;\n\n  /**\n   * Prevents the default browser action.\n   * See https://developer.mozilla.org/en-US/docs/Web/API/event.preventDefault.\n   * @override\n   * @api\n   */\n  MapBrowserEvent.prototype.preventDefault = function preventDefault () {\n    MapEvent.prototype.preventDefault.call(this);\n    this.originalEvent.preventDefault();\n  };\n\n  /**\n   * Prevents further propagation of the current event.\n   * See https://developer.mozilla.org/en-US/docs/Web/API/event.stopPropagation.\n   * @override\n   * @api\n   */\n  MapBrowserEvent.prototype.stopPropagation = function stopPropagation () {\n    MapEvent.prototype.stopPropagation.call(this);\n    this.originalEvent.stopPropagation();\n  };\n\n  return MapBrowserEvent;\n}(MapEvent));\n\n\nexport default MapBrowserEvent;\n\n//# sourceMappingURL=MapBrowserEvent.js.map","/**\n * @module ol/has\n */\n\nvar ua = typeof navigator !== 'undefined' ?\n  navigator.userAgent.toLowerCase() : '';\n\n/**\n * User agent string says we are dealing with Firefox as browser.\n * @type {boolean}\n */\nexport var FIREFOX = ua.indexOf('firefox') !== -1;\n\n/**\n * User agent string says we are dealing with Safari as browser.\n * @type {boolean}\n */\nexport var SAFARI = ua.indexOf('safari') !== -1 && ua.indexOf('chrom') == -1;\n\n/**\n * User agent string says we are dealing with a WebKit engine.\n * @type {boolean}\n */\nexport var WEBKIT = ua.indexOf('webkit') !== -1 && ua.indexOf('edge') == -1;\n\n/**\n * User agent string says we are dealing with a Mac as platform.\n * @type {boolean}\n */\nexport var MAC = ua.indexOf('macintosh') !== -1;\n\n\n/**\n * The ratio between physical pixels and device-independent pixels\n * (dips) on the device (`window.devicePixelRatio`).\n * @const\n * @type {number}\n * @api\n */\nexport var DEVICE_PIXEL_RATIO = window.devicePixelRatio || 1;\n\n\n/**\n * True if the browser's Canvas implementation implements {get,set}LineDash.\n * @type {boolean}\n */\nexport var CANVAS_LINE_DASH = function() {\n  var has = false;\n  try {\n    has = !!document.createElement('canvas').getContext('2d').setLineDash;\n  } catch (e) {\n    // pass\n  }\n  return has;\n}();\n\n\n/**\n * Is HTML5 geolocation supported in the current browser?\n * @const\n * @type {boolean}\n * @api\n */\nexport var GEOLOCATION = 'geolocation' in navigator;\n\n\n/**\n * True if browser supports touch events.\n * @const\n * @type {boolean}\n * @api\n */\nexport var TOUCH = 'ontouchstart' in window;\n\n\n/**\n * True if browser supports pointer events.\n * @const\n * @type {boolean}\n */\nexport var POINTER = 'PointerEvent' in window;\n\n\n/**\n * True if browser supports ms pointer events (IE 10).\n * @const\n * @type {boolean}\n */\nexport var MSPOINTER = !!(navigator.msPointerEnabled);\n\n\nexport {HAS as WEBGL} from './webgl.js';\n\n//# sourceMappingURL=has.js.map","/**\n * @module ol/MapBrowserEventType\n */\nimport EventType from './events/EventType.js';\n\n/**\n * Constants for event names.\n * @enum {string}\n */\nexport default {\n\n  /**\n   * A true single click with no dragging and no double click. Note that this\n   * event is delayed by 250 ms to ensure that it is not a double click.\n   * @event module:ol/MapBrowserEvent~MapBrowserEvent#singleclick\n   * @api\n   */\n  SINGLECLICK: 'singleclick',\n\n  /**\n   * A click with no dragging. A double click will fire two of this.\n   * @event module:ol/MapBrowserEvent~MapBrowserEvent#click\n   * @api\n   */\n  CLICK: EventType.CLICK,\n\n  /**\n   * A true double click, with no dragging.\n   * @event module:ol/MapBrowserEvent~MapBrowserEvent#dblclick\n   * @api\n   */\n  DBLCLICK: EventType.DBLCLICK,\n\n  /**\n   * Triggered when a pointer is dragged.\n   * @event module:ol/MapBrowserEvent~MapBrowserEvent#pointerdrag\n   * @api\n   */\n  POINTERDRAG: 'pointerdrag',\n\n  /**\n   * Triggered when a pointer is moved. Note that on touch devices this is\n   * triggered when the map is panned, so is not the same as mousemove.\n   * @event module:ol/MapBrowserEvent~MapBrowserEvent#pointermove\n   * @api\n   */\n  POINTERMOVE: 'pointermove',\n\n  POINTERDOWN: 'pointerdown',\n  POINTERUP: 'pointerup',\n  POINTEROVER: 'pointerover',\n  POINTEROUT: 'pointerout',\n  POINTERENTER: 'pointerenter',\n  POINTERLEAVE: 'pointerleave',\n  POINTERCANCEL: 'pointercancel'\n};\n\n//# sourceMappingURL=MapBrowserEventType.js.map","/**\n * @module ol/MapBrowserPointerEvent\n */\nimport MapBrowserEvent from './MapBrowserEvent.js';\n\nvar MapBrowserPointerEvent = /*@__PURE__*/(function (MapBrowserEvent) {\n  function MapBrowserPointerEvent(type, map, pointerEvent, opt_dragging, opt_frameState) {\n\n    MapBrowserEvent.call(this, type, map, pointerEvent.originalEvent, opt_dragging, opt_frameState);\n\n    /**\n     * @const\n     * @type {import(\"./pointer/PointerEvent.js\").default}\n     */\n    this.pointerEvent = pointerEvent;\n\n  }\n\n  if ( MapBrowserEvent ) MapBrowserPointerEvent.__proto__ = MapBrowserEvent;\n  MapBrowserPointerEvent.prototype = Object.create( MapBrowserEvent && MapBrowserEvent.prototype );\n  MapBrowserPointerEvent.prototype.constructor = MapBrowserPointerEvent;\n\n  return MapBrowserPointerEvent;\n}(MapBrowserEvent));\n\nexport default MapBrowserPointerEvent;\n\n//# sourceMappingURL=MapBrowserPointerEvent.js.map","/**\n * @module ol/pointer/EventType\n */\n\n/**\n * Constants for event names.\n * @enum {string}\n */\nexport default {\n  POINTERMOVE: 'pointermove',\n  POINTERDOWN: 'pointerdown',\n  POINTERUP: 'pointerup',\n  POINTEROVER: 'pointerover',\n  POINTEROUT: 'pointerout',\n  POINTERENTER: 'pointerenter',\n  POINTERLEAVE: 'pointerleave',\n  POINTERCANCEL: 'pointercancel'\n};\n\n//# sourceMappingURL=EventType.js.map","/**\n * @module ol/pointer/EventSource\n */\n\nvar EventSource = function EventSource(dispatcher, mapping) {\n\n  /**\n   * @type {import(\"./PointerEventHandler.js\").default}\n   */\n  this.dispatcher = dispatcher;\n\n  /**\n   * @private\n   * @const\n   * @type {!Object<string, function(Event)>}\n   */\n  this.mapping_ = mapping;\n};\n\n/**\n * List of events supported by this source.\n * @return {Array<string>} Event names\n */\nEventSource.prototype.getEvents = function getEvents () {\n  return Object.keys(this.mapping_);\n};\n\n/**\n * Returns the handler that should handle a given event type.\n * @param {string} eventType The event type.\n * @return {function(Event)} Handler\n */\nEventSource.prototype.getHandlerForEvent = function getHandlerForEvent (eventType) {\n  return this.mapping_[eventType];\n};\n\nexport default EventSource;\n\n//# sourceMappingURL=EventSource.js.map","/**\n * @module ol/pointer/MouseSource\n */\n\n// Based on https://github.com/Polymer/PointerEvents\n\n// Copyright (c) 2013 The Polymer Authors. All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are\n// met:\n//\n// * Redistributions of source code must retain the above copyright\n// notice, this list of conditions and the following disclaimer.\n// * Redistributions in binary form must reproduce the above\n// copyright notice, this list of conditions and the following disclaimer\n// in the documentation and/or other materials provided with the\n// distribution.\n// * Neither the name of Google Inc. nor the names of its\n// contributors may be used to endorse or promote products derived from\n// this software without specific prior written permission.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n\nimport EventSource from './EventSource.js';\n\n\n/**\n * @type {number}\n */\nexport var POINTER_ID = 1;\n\n\n/**\n * @type {string}\n */\nexport var POINTER_TYPE = 'mouse';\n\n\n/**\n * Radius around touchend that swallows mouse events.\n *\n * @type {number}\n */\nvar DEDUP_DIST = 25;\n\n/**\n * Handler for `mousedown`.\n *\n * @this {MouseSource}\n * @param {MouseEvent} inEvent The in event.\n */\nfunction mousedown(inEvent) {\n  if (!this.isEventSimulatedFromTouch_(inEvent)) {\n    // TODO(dfreedman) workaround for some elements not sending mouseup\n    // http://crbug/149091\n    if (POINTER_ID.toString() in this.pointerMap) {\n      this.cancel(inEvent);\n    }\n    var e = prepareEvent(inEvent, this.dispatcher);\n    this.pointerMap[POINTER_ID.toString()] = inEvent;\n    this.dispatcher.down(e, inEvent);\n  }\n}\n\n/**\n * Handler for `mousemove`.\n *\n * @this {MouseSource}\n * @param {MouseEvent} inEvent The in event.\n */\nfunction mousemove(inEvent) {\n  if (!this.isEventSimulatedFromTouch_(inEvent)) {\n    var e = prepareEvent(inEvent, this.dispatcher);\n    this.dispatcher.move(e, inEvent);\n  }\n}\n\n/**\n * Handler for `mouseup`.\n *\n * @this {MouseSource}\n * @param {MouseEvent} inEvent The in event.\n */\nfunction mouseup(inEvent) {\n  if (!this.isEventSimulatedFromTouch_(inEvent)) {\n    var p = this.pointerMap[POINTER_ID.toString()];\n\n    if (p && p.button === inEvent.button) {\n      var e = prepareEvent(inEvent, this.dispatcher);\n      this.dispatcher.up(e, inEvent);\n      this.cleanupMouse();\n    }\n  }\n}\n\n/**\n * Handler for `mouseover`.\n *\n * @this {MouseSource}\n * @param {MouseEvent} inEvent The in event.\n */\nfunction mouseover(inEvent) {\n  if (!this.isEventSimulatedFromTouch_(inEvent)) {\n    var e = prepareEvent(inEvent, this.dispatcher);\n    this.dispatcher.enterOver(e, inEvent);\n  }\n}\n\n/**\n * Handler for `mouseout`.\n *\n * @this {MouseSource}\n * @param {MouseEvent} inEvent The in event.\n */\nfunction mouseout(inEvent) {\n  if (!this.isEventSimulatedFromTouch_(inEvent)) {\n    var e = prepareEvent(inEvent, this.dispatcher);\n    this.dispatcher.leaveOut(e, inEvent);\n  }\n}\n\n\nvar MouseSource = /*@__PURE__*/(function (EventSource) {\n  function MouseSource(dispatcher) {\n    var mapping = {\n      'mousedown': mousedown,\n      'mousemove': mousemove,\n      'mouseup': mouseup,\n      'mouseover': mouseover,\n      'mouseout': mouseout\n    };\n    EventSource.call(this, dispatcher, mapping);\n\n    /**\n     * @const\n     * @type {!Object<string, Event|Object>}\n     */\n    this.pointerMap = dispatcher.pointerMap;\n\n    /**\n     * @const\n     * @type {Array<import(\"../pixel.js\").Pixel>}\n     */\n    this.lastTouches = [];\n  }\n\n  if ( EventSource ) MouseSource.__proto__ = EventSource;\n  MouseSource.prototype = Object.create( EventSource && EventSource.prototype );\n  MouseSource.prototype.constructor = MouseSource;\n\n  /**\n   * Detect if a mouse event was simulated from a touch by\n   * checking if previously there was a touch event at the\n   * same position.\n   *\n   * FIXME - Known problem with the native Android browser on\n   * Samsung GT-I9100 (Android 4.1.2):\n   * In case the page is scrolled, this function does not work\n   * correctly when a canvas is used (WebGL or canvas renderer).\n   * Mouse listeners on canvas elements (for this browser), create\n   * two mouse events: One 'good' and one 'bad' one (on other browsers or\n   * when a div is used, there is only one event). For the 'bad' one,\n   * clientX/clientY and also pageX/pageY are wrong when the page\n   * is scrolled. Because of that, this function can not detect if\n   * the events were simulated from a touch event. As result, a\n   * pointer event at a wrong position is dispatched, which confuses\n   * the map interactions.\n   * It is unclear, how one can get the correct position for the event\n   * or detect that the positions are invalid.\n   *\n   * @private\n   * @param {MouseEvent} inEvent The in event.\n   * @return {boolean} True, if the event was generated by a touch.\n   */\n  MouseSource.prototype.isEventSimulatedFromTouch_ = function isEventSimulatedFromTouch_ (inEvent) {\n    var lts = this.lastTouches;\n    var x = inEvent.clientX;\n    var y = inEvent.clientY;\n    for (var i = 0, l = lts.length, t = (void 0); i < l && (t = lts[i]); i++) {\n      // simulated mouse events will be swallowed near a primary touchend\n      var dx = Math.abs(x - t[0]);\n      var dy = Math.abs(y - t[1]);\n      if (dx <= DEDUP_DIST && dy <= DEDUP_DIST) {\n        return true;\n      }\n    }\n    return false;\n  };\n\n  /**\n   * Dispatches a `pointercancel` event.\n   *\n   * @param {Event} inEvent The in event.\n   */\n  MouseSource.prototype.cancel = function cancel (inEvent) {\n    var e = prepareEvent(inEvent, this.dispatcher);\n    this.dispatcher.cancel(e, inEvent);\n    this.cleanupMouse();\n  };\n\n  /**\n   * Remove the mouse from the list of active pointers.\n   */\n  MouseSource.prototype.cleanupMouse = function cleanupMouse () {\n    delete this.pointerMap[POINTER_ID.toString()];\n  };\n\n  return MouseSource;\n}(EventSource));\n\n\n/**\n * Creates a copy of the original event that will be used\n * for the fake pointer event.\n *\n * @param {Event} inEvent The in event.\n * @param {import(\"./PointerEventHandler.js\").default} dispatcher Event handler.\n * @return {Object} The copied event.\n */\nexport function prepareEvent(inEvent, dispatcher) {\n  var e = dispatcher.cloneEvent(inEvent, inEvent);\n\n  // forward mouse preventDefault\n  var pd = e.preventDefault;\n  e.preventDefault = function() {\n    inEvent.preventDefault();\n    pd();\n  };\n\n  e.pointerId = POINTER_ID;\n  e.isPrimary = true;\n  e.pointerType = POINTER_TYPE;\n\n  return e;\n}\n\n\nexport default MouseSource;\n\n//# sourceMappingURL=MouseSource.js.map","/**\n * @module ol/pointer/MsSource\n */\n// Based on https://github.com/Polymer/PointerEvents\n\n// Copyright (c) 2013 The Polymer Authors. All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are\n// met:\n//\n// * Redistributions of source code must retain the above copyright\n// notice, this list of conditions and the following disclaimer.\n// * Redistributions in binary form must reproduce the above\n// copyright notice, this list of conditions and the following disclaimer\n// in the documentation and/or other materials provided with the\n// distribution.\n// * Neither the name of Google Inc. nor the names of its\n// contributors may be used to endorse or promote products derived from\n// this software without specific prior written permission.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n\nimport EventSource from './EventSource.js';\n\n\n/**\n * @const\n * @type {Array<string>}\n */\nvar POINTER_TYPES = [\n  '',\n  'unavailable',\n  'touch',\n  'pen',\n  'mouse'\n];\n\n/**\n * Handler for `msPointerDown`.\n *\n * @this {MsSource}\n * @param {MSPointerEvent} inEvent The in event.\n */\nfunction msPointerDown(inEvent) {\n  this.pointerMap[inEvent.pointerId.toString()] = inEvent;\n  var e = this.prepareEvent_(inEvent);\n  this.dispatcher.down(e, inEvent);\n}\n\n/**\n * Handler for `msPointerMove`.\n *\n * @this {MsSource}\n * @param {MSPointerEvent} inEvent The in event.\n */\nfunction msPointerMove(inEvent) {\n  var e = this.prepareEvent_(inEvent);\n  this.dispatcher.move(e, inEvent);\n}\n\n/**\n * Handler for `msPointerUp`.\n *\n * @this {MsSource}\n * @param {MSPointerEvent} inEvent The in event.\n */\nfunction msPointerUp(inEvent) {\n  var e = this.prepareEvent_(inEvent);\n  this.dispatcher.up(e, inEvent);\n  this.cleanup(inEvent.pointerId);\n}\n\n/**\n * Handler for `msPointerOut`.\n *\n * @this {MsSource}\n * @param {MSPointerEvent} inEvent The in event.\n */\nfunction msPointerOut(inEvent) {\n  var e = this.prepareEvent_(inEvent);\n  this.dispatcher.leaveOut(e, inEvent);\n}\n\n/**\n * Handler for `msPointerOver`.\n *\n * @this {MsSource}\n * @param {MSPointerEvent} inEvent The in event.\n */\nfunction msPointerOver(inEvent) {\n  var e = this.prepareEvent_(inEvent);\n  this.dispatcher.enterOver(e, inEvent);\n}\n\n/**\n * Handler for `msPointerCancel`.\n *\n * @this {MsSource}\n * @param {MSPointerEvent} inEvent The in event.\n */\nfunction msPointerCancel(inEvent) {\n  var e = this.prepareEvent_(inEvent);\n  this.dispatcher.cancel(e, inEvent);\n  this.cleanup(inEvent.pointerId);\n}\n\n/**\n * Handler for `msLostPointerCapture`.\n *\n * @this {MsSource}\n * @param {MSPointerEvent} inEvent The in event.\n */\nfunction msLostPointerCapture(inEvent) {\n  var e = this.dispatcher.makeEvent('lostpointercapture', inEvent, inEvent);\n  this.dispatcher.dispatchEvent(e);\n}\n\n/**\n * Handler for `msGotPointerCapture`.\n *\n * @this {MsSource}\n * @param {MSPointerEvent} inEvent The in event.\n */\nfunction msGotPointerCapture(inEvent) {\n  var e = this.dispatcher.makeEvent('gotpointercapture', inEvent, inEvent);\n  this.dispatcher.dispatchEvent(e);\n}\n\nvar MsSource = /*@__PURE__*/(function (EventSource) {\n  function MsSource(dispatcher) {\n    var mapping = {\n      'MSPointerDown': msPointerDown,\n      'MSPointerMove': msPointerMove,\n      'MSPointerUp': msPointerUp,\n      'MSPointerOut': msPointerOut,\n      'MSPointerOver': msPointerOver,\n      'MSPointerCancel': msPointerCancel,\n      'MSGotPointerCapture': msGotPointerCapture,\n      'MSLostPointerCapture': msLostPointerCapture\n    };\n    EventSource.call(this, dispatcher, mapping);\n\n    /**\n     * @const\n     * @type {!Object<string, MSPointerEvent|Object>}\n     */\n    this.pointerMap = dispatcher.pointerMap;\n  }\n\n  if ( EventSource ) MsSource.__proto__ = EventSource;\n  MsSource.prototype = Object.create( EventSource && EventSource.prototype );\n  MsSource.prototype.constructor = MsSource;\n\n  /**\n   * Creates a copy of the original event that will be used\n   * for the fake pointer event.\n   *\n   * @private\n   * @param {MSPointerEvent} inEvent The in event.\n   * @return {Object} The copied event.\n   */\n  MsSource.prototype.prepareEvent_ = function prepareEvent_ (inEvent) {\n    /** @type {MSPointerEvent|Object} */\n    var e = inEvent;\n    if (typeof inEvent.pointerType === 'number') {\n      e = this.dispatcher.cloneEvent(inEvent, inEvent);\n      e.pointerType = POINTER_TYPES[inEvent.pointerType];\n    }\n\n    return e;\n  };\n\n  /**\n   * Remove this pointer from the list of active pointers.\n   * @param {number} pointerId Pointer identifier.\n   */\n  MsSource.prototype.cleanup = function cleanup (pointerId) {\n    delete this.pointerMap[pointerId.toString()];\n  };\n\n  return MsSource;\n}(EventSource));\n\nexport default MsSource;\n\n//# sourceMappingURL=MsSource.js.map","/**\n * @module ol/pointer/NativeSource\n */\n\n// Based on https://github.com/Polymer/PointerEvents\n\n// Copyright (c) 2013 The Polymer Authors. All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are\n// met:\n//\n// * Redistributions of source code must retain the above copyright\n// notice, this list of conditions and the following disclaimer.\n// * Redistributions in binary form must reproduce the above\n// copyright notice, this list of conditions and the following disclaimer\n// in the documentation and/or other materials provided with the\n// distribution.\n// * Neither the name of Google Inc. nor the names of its\n// contributors may be used to endorse or promote products derived from\n// this software without specific prior written permission.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n\nimport EventSource from './EventSource.js';\n\n/**\n * Handler for `pointerdown`.\n *\n * @this {NativeSource}\n * @param {Event} inEvent The in event.\n */\nfunction pointerDown(inEvent) {\n  this.dispatcher.fireNativeEvent(inEvent);\n}\n\n/**\n * Handler for `pointermove`.\n *\n * @this {NativeSource}\n * @param {Event} inEvent The in event.\n */\nfunction pointerMove(inEvent) {\n  this.dispatcher.fireNativeEvent(inEvent);\n}\n\n/**\n * Handler for `pointerup`.\n *\n * @this {NativeSource}\n * @param {Event} inEvent The in event.\n */\nfunction pointerUp(inEvent) {\n  this.dispatcher.fireNativeEvent(inEvent);\n}\n\n/**\n * Handler for `pointerout`.\n *\n * @this {NativeSource}\n * @param {Event} inEvent The in event.\n */\nfunction pointerOut(inEvent) {\n  this.dispatcher.fireNativeEvent(inEvent);\n}\n\n/**\n * Handler for `pointerover`.\n *\n * @this {NativeSource}\n * @param {Event} inEvent The in event.\n */\nfunction pointerOver(inEvent) {\n  this.dispatcher.fireNativeEvent(inEvent);\n}\n\n/**\n * Handler for `pointercancel`.\n *\n * @this {NativeSource}\n * @param {Event} inEvent The in event.\n */\nfunction pointerCancel(inEvent) {\n  this.dispatcher.fireNativeEvent(inEvent);\n}\n\n/**\n * Handler for `lostpointercapture`.\n *\n * @this {NativeSource}\n * @param {Event} inEvent The in event.\n */\nfunction lostPointerCapture(inEvent) {\n  this.dispatcher.fireNativeEvent(inEvent);\n}\n\n/**\n * Handler for `gotpointercapture`.\n *\n * @this {NativeSource}\n * @param {Event} inEvent The in event.\n */\nfunction gotPointerCapture(inEvent) {\n  this.dispatcher.fireNativeEvent(inEvent);\n}\n\nvar NativeSource = /*@__PURE__*/(function (EventSource) {\n  function NativeSource(dispatcher) {\n    var mapping = {\n      'pointerdown': pointerDown,\n      'pointermove': pointerMove,\n      'pointerup': pointerUp,\n      'pointerout': pointerOut,\n      'pointerover': pointerOver,\n      'pointercancel': pointerCancel,\n      'gotpointercapture': gotPointerCapture,\n      'lostpointercapture': lostPointerCapture\n    };\n    EventSource.call(this, dispatcher, mapping);\n  }\n\n  if ( EventSource ) NativeSource.__proto__ = EventSource;\n  NativeSource.prototype = Object.create( EventSource && EventSource.prototype );\n  NativeSource.prototype.constructor = NativeSource;\n\n  return NativeSource;\n}(EventSource));\n\nexport default NativeSource;\n\n//# sourceMappingURL=NativeSource.js.map","/**\n * @module ol/pointer/PointerEvent\n */\n\n// Based on https://github.com/Polymer/PointerEvents\n\n// Copyright (c) 2013 The Polymer Authors. All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are\n// met:\n//\n// * Redistributions of source code must retain the above copyright\n// notice, this list of conditions and the following disclaimer.\n// * Redistributions in binary form must reproduce the above\n// copyright notice, this list of conditions and the following disclaimer\n// in the documentation and/or other materials provided with the\n// distribution.\n// * Neither the name of Google Inc. nor the names of its\n// contributors may be used to endorse or promote products derived from\n// this software without specific prior written permission.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n\nimport _Event from '../events/Event.js';\n\n\n/**\n * Is the `buttons` property supported?\n * @type {boolean}\n */\nvar HAS_BUTTONS = false;\n\n\nvar PointerEvent = /*@__PURE__*/(function (_Event) {\n  function PointerEvent(type, originalEvent, opt_eventDict) {\n    _Event.call(this, type);\n\n    /**\n     * @const\n     * @type {Event}\n     */\n    this.originalEvent = originalEvent;\n\n    var eventDict = opt_eventDict ? opt_eventDict : {};\n\n    /**\n     * @type {number}\n     */\n    this.buttons = getButtons(eventDict);\n\n    /**\n     * @type {number}\n     */\n    this.pressure = getPressure(eventDict, this.buttons);\n\n    // MouseEvent related properties\n\n    /**\n     * @type {boolean}\n     */\n    this.bubbles = 'bubbles' in eventDict ? eventDict['bubbles'] : false;\n\n    /**\n     * @type {boolean}\n     */\n    this.cancelable = 'cancelable' in eventDict ? eventDict['cancelable'] : false;\n\n    /**\n     * @type {Object}\n     */\n    this.view = 'view' in eventDict ? eventDict['view'] : null;\n\n    /**\n     * @type {number}\n     */\n    this.detail = 'detail' in eventDict ? eventDict['detail'] : null;\n\n    /**\n     * @type {number}\n     */\n    this.screenX = 'screenX' in eventDict ? eventDict['screenX'] : 0;\n\n    /**\n     * @type {number}\n     */\n    this.screenY = 'screenY' in eventDict ? eventDict['screenY'] : 0;\n\n    /**\n     * @type {number}\n     */\n    this.clientX = 'clientX' in eventDict ? eventDict['clientX'] : 0;\n\n    /**\n     * @type {number}\n     */\n    this.clientY = 'clientY' in eventDict ? eventDict['clientY'] : 0;\n\n    /**\n     * @type {boolean}\n     */\n    this.ctrlKey = 'ctrlKey' in eventDict ? eventDict['ctrlKey'] : false;\n\n    /**\n     * @type {boolean}\n     */\n    this.altKey = 'altKey' in eventDict ? eventDict['altKey'] : false;\n\n    /**\n     * @type {boolean}\n     */\n    this.shiftKey = 'shiftKey' in eventDict ? eventDict['shiftKey'] : false;\n\n    /**\n     * @type {boolean}\n     */\n    this.metaKey = 'metaKey' in eventDict ? eventDict['metaKey'] : false;\n\n    /**\n     * @type {number}\n     */\n    this.button = 'button' in eventDict ? eventDict['button'] : 0;\n\n    /**\n     * @type {Node}\n     */\n    this.relatedTarget = 'relatedTarget' in eventDict ?\n      eventDict['relatedTarget'] : null;\n\n    // PointerEvent related properties\n\n    /**\n     * @const\n     * @type {number}\n     */\n    this.pointerId = 'pointerId' in eventDict ? eventDict['pointerId'] : 0;\n\n    /**\n     * @type {number}\n     */\n    this.width = 'width' in eventDict ? eventDict['width'] : 0;\n\n    /**\n     * @type {number}\n     */\n    this.height = 'height' in eventDict ? eventDict['height'] : 0;\n\n    /**\n     * @type {number}\n     */\n    this.tiltX = 'tiltX' in eventDict ? eventDict['tiltX'] : 0;\n\n    /**\n     * @type {number}\n     */\n    this.tiltY = 'tiltY' in eventDict ? eventDict['tiltY'] : 0;\n\n    /**\n     * @type {string}\n     */\n    this.pointerType = 'pointerType' in eventDict ? eventDict['pointerType'] : '';\n\n    /**\n     * @type {number}\n     */\n    this.hwTimestamp = 'hwTimestamp' in eventDict ? eventDict['hwTimestamp'] : 0;\n\n    /**\n     * @type {boolean}\n     */\n    this.isPrimary = 'isPrimary' in eventDict ? eventDict['isPrimary'] : false;\n\n    // keep the semantics of preventDefault\n    if (originalEvent.preventDefault) {\n      this.preventDefault = function() {\n        originalEvent.preventDefault();\n      };\n    }\n  }\n\n  if ( _Event ) PointerEvent.__proto__ = _Event;\n  PointerEvent.prototype = Object.create( _Event && _Event.prototype );\n  PointerEvent.prototype.constructor = PointerEvent;\n\n  return PointerEvent;\n}(_Event));\n\n\n/**\n * @param {Object<string, ?>} eventDict The event dictionary.\n * @return {number} Button indicator.\n */\nfunction getButtons(eventDict) {\n  // According to the w3c spec,\n  // http://www.w3.org/TR/DOM-Level-3-Events/#events-MouseEvent-button\n  // MouseEvent.button == 0 can mean either no mouse button depressed, or the\n  // left mouse button depressed.\n  //\n  // As of now, the only way to distinguish between the two states of\n  // MouseEvent.button is by using the deprecated MouseEvent.which property, as\n  // this maps mouse buttons to positive integers > 0, and uses 0 to mean that\n  // no mouse button is held.\n  //\n  // MouseEvent.which is derived from MouseEvent.button at MouseEvent creation,\n  // but initMouseEvent does not expose an argument with which to set\n  // MouseEvent.which. Calling initMouseEvent with a buttonArg of 0 will set\n  // MouseEvent.button == 0 and MouseEvent.which == 1, breaking the expectations\n  // of app developers.\n  //\n  // The only way to propagate the correct state of MouseEvent.which and\n  // MouseEvent.button to a new MouseEvent.button == 0 and MouseEvent.which == 0\n  // is to call initMouseEvent with a buttonArg value of -1.\n  //\n  // This is fixed with DOM Level 4's use of buttons\n  var buttons;\n  if (eventDict.buttons || HAS_BUTTONS) {\n    buttons = eventDict.buttons;\n  } else {\n    switch (eventDict.which) {\n      case 1: buttons = 1; break;\n      case 2: buttons = 4; break;\n      case 3: buttons = 2; break;\n      default: buttons = 0;\n    }\n  }\n  return buttons;\n}\n\n\n/**\n * @param {Object<string, ?>} eventDict The event dictionary.\n * @param {number} buttons Button indicator.\n * @return {number} The pressure.\n */\nfunction getPressure(eventDict, buttons) {\n  // Spec requires that pointers without pressure specified use 0.5 for down\n  // state and 0 for up state.\n  var pressure = 0;\n  if (eventDict.pressure) {\n    pressure = eventDict.pressure;\n  } else {\n    pressure = buttons ? 0.5 : 0;\n  }\n  return pressure;\n}\n\n\n/**\n * Checks if the `buttons` property is supported.\n */\n(function() {\n  try {\n    var ev = new MouseEvent('click', {buttons: 1});\n    HAS_BUTTONS = ev.buttons === 1;\n  } catch (e) {\n    // pass\n  }\n})();\n\nexport default PointerEvent;\n\n//# sourceMappingURL=PointerEvent.js.map","/**\n * @module ol/array\n */\n\n\n/**\n * Performs a binary search on the provided sorted list and returns the index of the item if found. If it can't be found it'll return -1.\n * https://github.com/darkskyapp/binary-search\n *\n * @param {Array<*>} haystack Items to search through.\n * @param {*} needle The item to look for.\n * @param {Function=} opt_comparator Comparator function.\n * @return {number} The index of the item if found, -1 if not.\n */\nexport function binarySearch(haystack, needle, opt_comparator) {\n  var mid, cmp;\n  var comparator = opt_comparator || numberSafeCompareFunction;\n  var low = 0;\n  var high = haystack.length;\n  var found = false;\n\n  while (low < high) {\n    /* Note that \"(low + high) >>> 1\" may overflow, and results in a typecast\n     * to double (which gives the wrong results). */\n    mid = low + (high - low >> 1);\n    cmp = +comparator(haystack[mid], needle);\n\n    if (cmp < 0.0) { /* Too low. */\n      low = mid + 1;\n\n    } else { /* Key found or too high */\n      high = mid;\n      found = !cmp;\n    }\n  }\n\n  /* Key not found. */\n  return found ? low : ~low;\n}\n\n\n/**\n * Compare function for array sort that is safe for numbers.\n * @param {*} a The first object to be compared.\n * @param {*} b The second object to be compared.\n * @return {number} A negative number, zero, or a positive number as the first\n *     argument is less than, equal to, or greater than the second.\n */\nexport function numberSafeCompareFunction(a, b) {\n  return a > b ? 1 : a < b ? -1 : 0;\n}\n\n\n/**\n * Whether the array contains the given object.\n * @param {Array<*>} arr The array to test for the presence of the element.\n * @param {*} obj The object for which to test.\n * @return {boolean} The object is in the array.\n */\nexport function includes(arr, obj) {\n  return arr.indexOf(obj) >= 0;\n}\n\n\n/**\n * @param {Array<number>} arr Array.\n * @param {number} target Target.\n * @param {number} direction 0 means return the nearest, > 0\n *    means return the largest nearest, < 0 means return the\n *    smallest nearest.\n * @return {number} Index.\n */\nexport function linearFindNearest(arr, target, direction) {\n  var n = arr.length;\n  if (arr[0] <= target) {\n    return 0;\n  } else if (target <= arr[n - 1]) {\n    return n - 1;\n  } else {\n    var i;\n    if (direction > 0) {\n      for (i = 1; i < n; ++i) {\n        if (arr[i] < target) {\n          return i - 1;\n        }\n      }\n    } else if (direction < 0) {\n      for (i = 1; i < n; ++i) {\n        if (arr[i] <= target) {\n          return i;\n        }\n      }\n    } else {\n      for (i = 1; i < n; ++i) {\n        if (arr[i] == target) {\n          return i;\n        } else if (arr[i] < target) {\n          if (arr[i - 1] - target < target - arr[i]) {\n            return i - 1;\n          } else {\n            return i;\n          }\n        }\n      }\n    }\n    return n - 1;\n  }\n}\n\n\n/**\n * @param {Array<*>} arr Array.\n * @param {number} begin Begin index.\n * @param {number} end End index.\n */\nexport function reverseSubArray(arr, begin, end) {\n  while (begin < end) {\n    var tmp = arr[begin];\n    arr[begin] = arr[end];\n    arr[end] = tmp;\n    ++begin;\n    --end;\n  }\n}\n\n\n/**\n * @param {Array<VALUE>} arr The array to modify.\n * @param {!Array<VALUE>|VALUE} data The elements or arrays of elements to add to arr.\n * @template VALUE\n */\nexport function extend(arr, data) {\n  var extension = Array.isArray(data) ? data : [data];\n  var length = extension.length;\n  for (var i = 0; i < length; i++) {\n    arr[arr.length] = extension[i];\n  }\n}\n\n\n/**\n * @param {Array<VALUE>} arr The array to modify.\n * @param {VALUE} obj The element to remove.\n * @template VALUE\n * @return {boolean} If the element was removed.\n */\nexport function remove(arr, obj) {\n  var i = arr.indexOf(obj);\n  var found = i > -1;\n  if (found) {\n    arr.splice(i, 1);\n  }\n  return found;\n}\n\n\n/**\n * @param {Array<VALUE>} arr The array to search in.\n * @param {function(VALUE, number, ?) : boolean} func The function to compare.\n * @template VALUE\n * @return {VALUE|null} The element found or null.\n */\nexport function find(arr, func) {\n  var length = arr.length >>> 0;\n  var value;\n\n  for (var i = 0; i < length; i++) {\n    value = arr[i];\n    if (func(value, i, arr)) {\n      return value;\n    }\n  }\n  return null;\n}\n\n\n/**\n * @param {Array|Uint8ClampedArray} arr1 The first array to compare.\n * @param {Array|Uint8ClampedArray} arr2 The second array to compare.\n * @return {boolean} Whether the two arrays are equal.\n */\nexport function equals(arr1, arr2) {\n  var len1 = arr1.length;\n  if (len1 !== arr2.length) {\n    return false;\n  }\n  for (var i = 0; i < len1; i++) {\n    if (arr1[i] !== arr2[i]) {\n      return false;\n    }\n  }\n  return true;\n}\n\n\n/**\n * Sort the passed array such that the relative order of equal elements is preverved.\n * See https://en.wikipedia.org/wiki/Sorting_algorithm#Stability for details.\n * @param {Array<*>} arr The array to sort (modifies original).\n * @param {!function(*, *): number} compareFnc Comparison function.\n * @api\n */\nexport function stableSort(arr, compareFnc) {\n  var length = arr.length;\n  var tmp = Array(arr.length);\n  var i;\n  for (i = 0; i < length; i++) {\n    tmp[i] = {index: i, value: arr[i]};\n  }\n  tmp.sort(function(a, b) {\n    return compareFnc(a.value, b.value) || a.index - b.index;\n  });\n  for (i = 0; i < arr.length; i++) {\n    arr[i] = tmp[i].value;\n  }\n}\n\n\n/**\n * @param {Array<*>} arr The array to search in.\n * @param {Function} func Comparison function.\n * @return {number} Return index.\n */\nexport function findIndex(arr, func) {\n  var index;\n  var found = !arr.every(function(el, idx) {\n    index = idx;\n    return !func(el, idx, arr);\n  });\n  return found ? index : -1;\n}\n\n\n/**\n * @param {Array<*>} arr The array to test.\n * @param {Function=} opt_func Comparison function.\n * @param {boolean=} opt_strict Strictly sorted (default false).\n * @return {boolean} Return index.\n */\nexport function isSorted(arr, opt_func, opt_strict) {\n  var compare = opt_func || numberSafeCompareFunction;\n  return arr.every(function(currentVal, index) {\n    if (index === 0) {\n      return true;\n    }\n    var res = compare(arr[index - 1], currentVal);\n    return !(res > 0 || opt_strict && res === 0);\n  });\n}\n\n//# sourceMappingURL=array.js.map","/**\n * @module ol/pointer/TouchSource\n */\n\n// Based on https://github.com/Polymer/PointerEvents\n\n// Copyright (c) 2013 The Polymer Authors. All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are\n// met:\n//\n// * Redistributions of source code must retain the above copyright\n// notice, this list of conditions and the following disclaimer.\n// * Redistributions in binary form must reproduce the above\n// copyright notice, this list of conditions and the following disclaimer\n// in the documentation and/or other materials provided with the\n// distribution.\n// * Neither the name of Google Inc. nor the names of its\n// contributors may be used to endorse or promote products derived from\n// this software without specific prior written permission.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n\nimport {remove} from '../array.js';\nimport EventSource from './EventSource.js';\nimport {POINTER_ID} from './MouseSource.js';\n\n\n/**\n * @type {number}\n */\nvar CLICK_COUNT_TIMEOUT = 200;\n\n/**\n * @type {string}\n */\nvar POINTER_TYPE = 'touch';\n\n/**\n * Handler for `touchstart`, triggers `pointerover`,\n * `pointerenter` and `pointerdown` events.\n *\n * @this {TouchSource}\n * @param {TouchEvent} inEvent The in event.\n */\nfunction touchstart(inEvent) {\n  this.vacuumTouches_(inEvent);\n  this.setPrimaryTouch_(inEvent.changedTouches[0]);\n  this.dedupSynthMouse_(inEvent);\n  this.clickCount_++;\n  this.processTouches_(inEvent, this.overDown_);\n}\n\n/**\n * Handler for `touchmove`.\n *\n * @this {TouchSource}\n * @param {TouchEvent} inEvent The in event.\n */\nfunction touchmove(inEvent) {\n  this.processTouches_(inEvent, this.moveOverOut_);\n}\n\n/**\n * Handler for `touchend`, triggers `pointerup`,\n * `pointerout` and `pointerleave` events.\n *\n * @this {TouchSource}\n * @param {TouchEvent} inEvent The event.\n */\nfunction touchend(inEvent) {\n  this.dedupSynthMouse_(inEvent);\n  this.processTouches_(inEvent, this.upOut_);\n}\n\n/**\n * Handler for `touchcancel`, triggers `pointercancel`,\n * `pointerout` and `pointerleave` events.\n *\n * @this {TouchSource}\n * @param {TouchEvent} inEvent The in event.\n */\nfunction touchcancel(inEvent) {\n  this.processTouches_(inEvent, this.cancelOut_);\n}\n\n\nvar TouchSource = /*@__PURE__*/(function (EventSource) {\n  function TouchSource(dispatcher, mouseSource) {\n    var mapping = {\n      'touchstart': touchstart,\n      'touchmove': touchmove,\n      'touchend': touchend,\n      'touchcancel': touchcancel\n    };\n    EventSource.call(this, dispatcher, mapping);\n\n    /**\n     * @const\n     * @type {!Object<string, Event|Object>}\n     */\n    this.pointerMap = dispatcher.pointerMap;\n\n    /**\n     * @const\n     * @type {import(\"./MouseSource.js\").default}\n     */\n    this.mouseSource = mouseSource;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.firstTouchId_ = undefined;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.clickCount_ = 0;\n\n    /**\n     * @private\n     * @type {?}\n     */\n    this.resetId_;\n\n    /**\n     * Mouse event timeout: This should be long enough to\n     * ignore compat mouse events made by touch.\n     * @private\n     * @type {number}\n     */\n    this.dedupTimeout_ = 2500;\n  }\n\n  if ( EventSource ) TouchSource.__proto__ = EventSource;\n  TouchSource.prototype = Object.create( EventSource && EventSource.prototype );\n  TouchSource.prototype.constructor = TouchSource;\n\n  /**\n   * @private\n   * @param {Touch} inTouch The in touch.\n   * @return {boolean} True, if this is the primary touch.\n   */\n  TouchSource.prototype.isPrimaryTouch_ = function isPrimaryTouch_ (inTouch) {\n    return this.firstTouchId_ === inTouch.identifier;\n  };\n\n  /**\n   * Set primary touch if there are no pointers, or the only pointer is the mouse.\n   * @param {Touch} inTouch The in touch.\n   * @private\n   */\n  TouchSource.prototype.setPrimaryTouch_ = function setPrimaryTouch_ (inTouch) {\n    var count = Object.keys(this.pointerMap).length;\n    if (count === 0 || (count === 1 && POINTER_ID.toString() in this.pointerMap)) {\n      this.firstTouchId_ = inTouch.identifier;\n      this.cancelResetClickCount_();\n    }\n  };\n\n  /**\n   * @private\n   * @param {PointerEvent} inPointer The in pointer object.\n   */\n  TouchSource.prototype.removePrimaryPointer_ = function removePrimaryPointer_ (inPointer) {\n    if (inPointer.isPrimary) {\n      this.firstTouchId_ = undefined;\n      this.resetClickCount_();\n    }\n  };\n\n  /**\n   * @private\n   */\n  TouchSource.prototype.resetClickCount_ = function resetClickCount_ () {\n    this.resetId_ = setTimeout(\n      this.resetClickCountHandler_.bind(this),\n      CLICK_COUNT_TIMEOUT);\n  };\n\n  /**\n   * @private\n   */\n  TouchSource.prototype.resetClickCountHandler_ = function resetClickCountHandler_ () {\n    this.clickCount_ = 0;\n    this.resetId_ = undefined;\n  };\n\n  /**\n   * @private\n   */\n  TouchSource.prototype.cancelResetClickCount_ = function cancelResetClickCount_ () {\n    if (this.resetId_ !== undefined) {\n      clearTimeout(this.resetId_);\n    }\n  };\n\n  /**\n   * @private\n   * @param {TouchEvent} browserEvent Browser event\n   * @param {Touch} inTouch Touch event\n   * @return {PointerEvent} A pointer object.\n   */\n  TouchSource.prototype.touchToPointer_ = function touchToPointer_ (browserEvent, inTouch) {\n    var e = this.dispatcher.cloneEvent(browserEvent, inTouch);\n    // Spec specifies that pointerId 1 is reserved for Mouse.\n    // Touch identifiers can start at 0.\n    // Add 2 to the touch identifier for compatibility.\n    e.pointerId = inTouch.identifier + 2;\n    // TODO: check if this is necessary?\n    //e.target = findTarget(e);\n    e.bubbles = true;\n    e.cancelable = true;\n    e.detail = this.clickCount_;\n    e.button = 0;\n    e.buttons = 1;\n    e.width = inTouch.radiusX || 0;\n    e.height = inTouch.radiusY || 0;\n    e.pressure = inTouch.force || 0.5;\n    e.isPrimary = this.isPrimaryTouch_(inTouch);\n    e.pointerType = POINTER_TYPE;\n\n    // make sure that the properties that are different for\n    // each `Touch` object are not copied from the BrowserEvent object\n    e.clientX = inTouch.clientX;\n    e.clientY = inTouch.clientY;\n    e.screenX = inTouch.screenX;\n    e.screenY = inTouch.screenY;\n\n    return e;\n  };\n\n  /**\n   * @private\n   * @param {TouchEvent} inEvent Touch event\n   * @param {function(TouchEvent, PointerEvent)} inFunction In function.\n   */\n  TouchSource.prototype.processTouches_ = function processTouches_ (inEvent, inFunction) {\n    var touches = Array.prototype.slice.call(inEvent.changedTouches);\n    var count = touches.length;\n    function preventDefault() {\n      inEvent.preventDefault();\n    }\n    for (var i = 0; i < count; ++i) {\n      var pointer = this.touchToPointer_(inEvent, touches[i]);\n      // forward touch preventDefaults\n      pointer.preventDefault = preventDefault;\n      inFunction.call(this, inEvent, pointer);\n    }\n  };\n\n  /**\n   * @private\n   * @param {TouchList} touchList The touch list.\n   * @param {number} searchId Search identifier.\n   * @return {boolean} True, if the `Touch` with the given id is in the list.\n   */\n  TouchSource.prototype.findTouch_ = function findTouch_ (touchList, searchId) {\n    var l = touchList.length;\n    for (var i = 0; i < l; i++) {\n      var touch = touchList[i];\n      if (touch.identifier === searchId) {\n        return true;\n      }\n    }\n    return false;\n  };\n\n  /**\n   * In some instances, a touchstart can happen without a touchend. This\n   * leaves the pointermap in a broken state.\n   * Therefore, on every touchstart, we remove the touches that did not fire a\n   * touchend event.\n   * To keep state globally consistent, we fire a pointercancel for\n   * this \"abandoned\" touch\n   *\n   * @private\n   * @param {TouchEvent} inEvent The in event.\n   */\n  TouchSource.prototype.vacuumTouches_ = function vacuumTouches_ (inEvent) {\n    var touchList = inEvent.touches;\n    // pointerMap.getCount() should be < touchList.length here,\n    // as the touchstart has not been processed yet.\n    var keys = Object.keys(this.pointerMap);\n    var count = keys.length;\n    if (count >= touchList.length) {\n      var d = [];\n      for (var i = 0; i < count; ++i) {\n        var key = Number(keys[i]);\n        var value = this.pointerMap[key];\n        // Never remove pointerId == 1, which is mouse.\n        // Touch identifiers are 2 smaller than their pointerId, which is the\n        // index in pointermap.\n        if (key != POINTER_ID && !this.findTouch_(touchList, key - 2)) {\n          d.push(value.out);\n        }\n      }\n      for (var i$1 = 0; i$1 < d.length; ++i$1) {\n        this.cancelOut_(inEvent, d[i$1]);\n      }\n    }\n  };\n\n  /**\n   * @private\n   * @param {TouchEvent} browserEvent The event.\n   * @param {PointerEvent} inPointer The in pointer object.\n   */\n  TouchSource.prototype.overDown_ = function overDown_ (browserEvent, inPointer) {\n    this.pointerMap[inPointer.pointerId] = {\n      target: inPointer.target,\n      out: inPointer,\n      outTarget: inPointer.target\n    };\n    this.dispatcher.over(inPointer, browserEvent);\n    this.dispatcher.enter(inPointer, browserEvent);\n    this.dispatcher.down(inPointer, browserEvent);\n  };\n\n  /**\n   * @private\n   * @param {TouchEvent} browserEvent The event.\n   * @param {PointerEvent} inPointer The in pointer.\n   */\n  TouchSource.prototype.moveOverOut_ = function moveOverOut_ (browserEvent, inPointer) {\n    var event = inPointer;\n    var pointer = this.pointerMap[event.pointerId];\n    // a finger drifted off the screen, ignore it\n    if (!pointer) {\n      return;\n    }\n    var outEvent = pointer.out;\n    var outTarget = pointer.outTarget;\n    this.dispatcher.move(event, browserEvent);\n    if (outEvent && outTarget !== event.target) {\n      outEvent.relatedTarget = event.target;\n      /** @type {Object} */ (event).relatedTarget = outTarget;\n      // recover from retargeting by shadow\n      outEvent.target = outTarget;\n      if (event.target) {\n        this.dispatcher.leaveOut(outEvent, browserEvent);\n        this.dispatcher.enterOver(event, browserEvent);\n      } else {\n        // clean up case when finger leaves the screen\n        /** @type {Object} */ (event).target = outTarget;\n        /** @type {Object} */ (event).relatedTarget = null;\n        this.cancelOut_(browserEvent, event);\n      }\n    }\n    pointer.out = event;\n    pointer.outTarget = event.target;\n  };\n\n  /**\n   * @private\n   * @param {TouchEvent} browserEvent An event.\n   * @param {PointerEvent} inPointer The inPointer object.\n   */\n  TouchSource.prototype.upOut_ = function upOut_ (browserEvent, inPointer) {\n    this.dispatcher.up(inPointer, browserEvent);\n    this.dispatcher.out(inPointer, browserEvent);\n    this.dispatcher.leave(inPointer, browserEvent);\n    this.cleanUpPointer_(inPointer);\n  };\n\n  /**\n   * @private\n   * @param {TouchEvent} browserEvent The event.\n   * @param {PointerEvent} inPointer The in pointer.\n   */\n  TouchSource.prototype.cancelOut_ = function cancelOut_ (browserEvent, inPointer) {\n    this.dispatcher.cancel(inPointer, browserEvent);\n    this.dispatcher.out(inPointer, browserEvent);\n    this.dispatcher.leave(inPointer, browserEvent);\n    this.cleanUpPointer_(inPointer);\n  };\n\n  /**\n   * @private\n   * @param {PointerEvent} inPointer The inPointer object.\n   */\n  TouchSource.prototype.cleanUpPointer_ = function cleanUpPointer_ (inPointer) {\n    delete this.pointerMap[inPointer.pointerId];\n    this.removePrimaryPointer_(inPointer);\n  };\n\n  /**\n   * Prevent synth mouse events from creating pointer events.\n   *\n   * @private\n   * @param {TouchEvent} inEvent The in event.\n   */\n  TouchSource.prototype.dedupSynthMouse_ = function dedupSynthMouse_ (inEvent) {\n    var lts = this.mouseSource.lastTouches;\n    var t = inEvent.changedTouches[0];\n    // only the primary finger will synth mouse events\n    if (this.isPrimaryTouch_(t)) {\n      // remember x/y of last touch\n      var lt = [t.clientX, t.clientY];\n      lts.push(lt);\n\n      setTimeout(function() {\n        // remove touch after timeout\n        remove(lts, lt);\n      }, this.dedupTimeout_);\n    }\n  };\n\n  return TouchSource;\n}(EventSource));\n\nexport default TouchSource;\n\n//# sourceMappingURL=TouchSource.js.map","/**\n * @module ol/pointer/PointerEventHandler\n */\n\n// Based on https://github.com/Polymer/PointerEvents\n\n// Copyright (c) 2013 The Polymer Authors. All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are\n// met:\n//\n// * Redistributions of source code must retain the above copyright\n// notice, this list of conditions and the following disclaimer.\n// * Redistributions in binary form must reproduce the above\n// copyright notice, this list of conditions and the following disclaimer\n// in the documentation and/or other materials provided with the\n// distribution.\n// * Neither the name of Google Inc. nor the names of its\n// contributors may be used to endorse or promote products derived from\n// this software without specific prior written permission.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n\nimport {listen, unlisten} from '../events.js';\nimport EventTarget from '../events/Target.js';\nimport {POINTER, MSPOINTER, TOUCH} from '../has.js';\nimport PointerEventType from './EventType.js';\nimport MouseSource, {prepareEvent as prepareMouseEvent} from './MouseSource.js';\nimport MsSource from './MsSource.js';\nimport NativeSource from './NativeSource.js';\nimport PointerEvent from './PointerEvent.js';\nimport TouchSource from './TouchSource.js';\n\n\n/**\n * Properties to copy when cloning an event, with default values.\n * @type {Array<Array>}\n */\nvar CLONE_PROPS = [\n  // MouseEvent\n  ['bubbles', false],\n  ['cancelable', false],\n  ['view', null],\n  ['detail', null],\n  ['screenX', 0],\n  ['screenY', 0],\n  ['clientX', 0],\n  ['clientY', 0],\n  ['ctrlKey', false],\n  ['altKey', false],\n  ['shiftKey', false],\n  ['metaKey', false],\n  ['button', 0],\n  ['relatedTarget', null],\n  // DOM Level 3\n  ['buttons', 0],\n  // PointerEvent\n  ['pointerId', 0],\n  ['width', 0],\n  ['height', 0],\n  ['pressure', 0],\n  ['tiltX', 0],\n  ['tiltY', 0],\n  ['pointerType', ''],\n  ['hwTimestamp', 0],\n  ['isPrimary', false],\n  // event instance\n  ['type', ''],\n  ['target', null],\n  ['currentTarget', null],\n  ['which', 0]\n];\n\n\nvar PointerEventHandler = /*@__PURE__*/(function (EventTarget) {\n  function PointerEventHandler(element) {\n    EventTarget.call(this);\n\n    /**\n     * @const\n     * @private\n     * @type {Element|HTMLDocument}\n     */\n    this.element_ = element;\n\n    /**\n     * @const\n     * @type {!Object<string, Event|Object>}\n     */\n    this.pointerMap = {};\n\n    /**\n     * @type {Object<string, function(Event)>}\n     * @private\n     */\n    this.eventMap_ = {};\n\n    /**\n     * @type {Array<import(\"./EventSource.js\").default>}\n     * @private\n     */\n    this.eventSourceList_ = [];\n\n    this.registerSources();\n  }\n\n  if ( EventTarget ) PointerEventHandler.__proto__ = EventTarget;\n  PointerEventHandler.prototype = Object.create( EventTarget && EventTarget.prototype );\n  PointerEventHandler.prototype.constructor = PointerEventHandler;\n\n  /**\n   * Set up the event sources (mouse, touch and native pointers)\n   * that generate pointer events.\n   */\n  PointerEventHandler.prototype.registerSources = function registerSources () {\n    if (POINTER) {\n      this.registerSource('native', new NativeSource(this));\n    } else if (MSPOINTER) {\n      this.registerSource('ms', new MsSource(this));\n    } else {\n      var mouseSource = new MouseSource(this);\n      this.registerSource('mouse', mouseSource);\n\n      if (TOUCH) {\n        this.registerSource('touch', new TouchSource(this, mouseSource));\n      }\n    }\n\n    // register events on the viewport element\n    this.register_();\n  };\n\n  /**\n   * Add a new event source that will generate pointer events.\n   *\n   * @param {string} name A name for the event source\n   * @param {import(\"./EventSource.js\").default} source The source event.\n   */\n  PointerEventHandler.prototype.registerSource = function registerSource (name, source) {\n    var s = source;\n    var newEvents = s.getEvents();\n\n    if (newEvents) {\n      newEvents.forEach(function(e) {\n        var handler = s.getHandlerForEvent(e);\n\n        if (handler) {\n          this.eventMap_[e] = handler.bind(s);\n        }\n      }.bind(this));\n      this.eventSourceList_.push(s);\n    }\n  };\n\n  /**\n   * Set up the events for all registered event sources.\n   * @private\n   */\n  PointerEventHandler.prototype.register_ = function register_ () {\n    var l = this.eventSourceList_.length;\n    for (var i = 0; i < l; i++) {\n      var eventSource = this.eventSourceList_[i];\n      this.addEvents_(eventSource.getEvents());\n    }\n  };\n\n  /**\n   * Remove all registered events.\n   * @private\n   */\n  PointerEventHandler.prototype.unregister_ = function unregister_ () {\n    var l = this.eventSourceList_.length;\n    for (var i = 0; i < l; i++) {\n      var eventSource = this.eventSourceList_[i];\n      this.removeEvents_(eventSource.getEvents());\n    }\n  };\n\n  /**\n   * Calls the right handler for a new event.\n   * @private\n   * @param {Event} inEvent Browser event.\n   */\n  PointerEventHandler.prototype.eventHandler_ = function eventHandler_ (inEvent) {\n    var type = inEvent.type;\n    var handler = this.eventMap_[type];\n    if (handler) {\n      handler(inEvent);\n    }\n  };\n\n  /**\n   * Setup listeners for the given events.\n   * @private\n   * @param {Array<string>} events List of events.\n   */\n  PointerEventHandler.prototype.addEvents_ = function addEvents_ (events) {\n    events.forEach(function(eventName) {\n      listen(this.element_, eventName, this.eventHandler_, this);\n    }.bind(this));\n  };\n\n  /**\n   * Unregister listeners for the given events.\n   * @private\n   * @param {Array<string>} events List of events.\n   */\n  PointerEventHandler.prototype.removeEvents_ = function removeEvents_ (events) {\n    events.forEach(function(e) {\n      unlisten(this.element_, e, this.eventHandler_, this);\n    }.bind(this));\n  };\n\n  /**\n   * Returns a snapshot of inEvent, with writable properties.\n   *\n   * @param {Event} event Browser event.\n   * @param {Event|Touch} inEvent An event that contains\n   *    properties to copy.\n   * @return {Object} An object containing shallow copies of\n   *    `inEvent`'s properties.\n   */\n  PointerEventHandler.prototype.cloneEvent = function cloneEvent (event, inEvent) {\n    var eventCopy = {};\n    for (var i = 0, ii = CLONE_PROPS.length; i < ii; i++) {\n      var p = CLONE_PROPS[i][0];\n      eventCopy[p] = event[p] || inEvent[p] || CLONE_PROPS[i][1];\n    }\n\n    return eventCopy;\n  };\n\n  // EVENTS\n\n\n  /**\n   * Triggers a 'pointerdown' event.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.down = function down (data, event) {\n    this.fireEvent(PointerEventType.POINTERDOWN, data, event);\n  };\n\n  /**\n   * Triggers a 'pointermove' event.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.move = function move (data, event) {\n    this.fireEvent(PointerEventType.POINTERMOVE, data, event);\n  };\n\n  /**\n   * Triggers a 'pointerup' event.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.up = function up (data, event) {\n    this.fireEvent(PointerEventType.POINTERUP, data, event);\n  };\n\n  /**\n   * Triggers a 'pointerenter' event.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.enter = function enter (data, event) {\n    data.bubbles = false;\n    this.fireEvent(PointerEventType.POINTERENTER, data, event);\n  };\n\n  /**\n   * Triggers a 'pointerleave' event.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.leave = function leave (data, event) {\n    data.bubbles = false;\n    this.fireEvent(PointerEventType.POINTERLEAVE, data, event);\n  };\n\n  /**\n   * Triggers a 'pointerover' event.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.over = function over (data, event) {\n    data.bubbles = true;\n    this.fireEvent(PointerEventType.POINTEROVER, data, event);\n  };\n\n  /**\n   * Triggers a 'pointerout' event.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.out = function out (data, event) {\n    data.bubbles = true;\n    this.fireEvent(PointerEventType.POINTEROUT, data, event);\n  };\n\n  /**\n   * Triggers a 'pointercancel' event.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.cancel = function cancel (data, event) {\n    this.fireEvent(PointerEventType.POINTERCANCEL, data, event);\n  };\n\n  /**\n   * Triggers a combination of 'pointerout' and 'pointerleave' events.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.leaveOut = function leaveOut (data, event) {\n    this.out(data, event);\n    if (!this.contains_(data.target, data.relatedTarget)) {\n      this.leave(data, event);\n    }\n  };\n\n  /**\n   * Triggers a combination of 'pointerover' and 'pointerevents' events.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.enterOver = function enterOver (data, event) {\n    this.over(data, event);\n    if (!this.contains_(data.target, data.relatedTarget)) {\n      this.enter(data, event);\n    }\n  };\n\n  /**\n   * @private\n   * @param {Element} container The container element.\n   * @param {Element} contained The contained element.\n   * @return {boolean} Returns true if the container element\n   *   contains the other element.\n   */\n  PointerEventHandler.prototype.contains_ = function contains_ (container, contained) {\n    if (!container || !contained) {\n      return false;\n    }\n    return container.contains(contained);\n  };\n\n  // EVENT CREATION AND TRACKING\n  /**\n   * Creates a new Event of type `inType`, based on the information in\n   * `data`.\n   *\n   * @param {string} inType A string representing the type of event to create.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   * @return {PointerEvent} A PointerEvent of type `inType`.\n   */\n  PointerEventHandler.prototype.makeEvent = function makeEvent (inType, data, event) {\n    return new PointerEvent(inType, event, data);\n  };\n\n  /**\n   * Make and dispatch an event in one call.\n   * @param {string} inType A string representing the type of event.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.fireEvent = function fireEvent (inType, data, event) {\n    var e = this.makeEvent(inType, data, event);\n    this.dispatchEvent(e);\n  };\n\n  /**\n   * Creates a pointer event from a native pointer event\n   * and dispatches this event.\n   * @param {Event} event A platform event with a target.\n   */\n  PointerEventHandler.prototype.fireNativeEvent = function fireNativeEvent (event) {\n    var e = this.makeEvent(event.type, event, event);\n    this.dispatchEvent(e);\n  };\n\n  /**\n   * Wrap a native mouse event into a pointer event.\n   * This proxy method is required for the legacy IE support.\n   * @param {string} eventType The pointer event type.\n   * @param {Event} event The event.\n   * @return {PointerEvent} The wrapped event.\n   */\n  PointerEventHandler.prototype.wrapMouseEvent = function wrapMouseEvent (eventType, event) {\n    var pointerEvent = this.makeEvent(\n      eventType, prepareMouseEvent(event, this), event);\n    return pointerEvent;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  PointerEventHandler.prototype.disposeInternal = function disposeInternal () {\n    this.unregister_();\n    EventTarget.prototype.disposeInternal.call(this);\n  };\n\n  return PointerEventHandler;\n}(EventTarget));\n\nexport default PointerEventHandler;\n\n//# sourceMappingURL=PointerEventHandler.js.map","/**\n * @module ol/MapBrowserEventHandler\n */\nimport {DEVICE_PIXEL_RATIO} from './has.js';\nimport MapBrowserEventType from './MapBrowserEventType.js';\nimport MapBrowserPointerEvent from './MapBrowserPointerEvent.js';\nimport {listen, unlistenByKey} from './events.js';\nimport EventTarget from './events/Target.js';\nimport PointerEventType from './pointer/EventType.js';\nimport PointerEventHandler from './pointer/PointerEventHandler.js';\n\nvar MapBrowserEventHandler = /*@__PURE__*/(function (EventTarget) {\n  function MapBrowserEventHandler(map, moveTolerance) {\n\n    EventTarget.call(this);\n\n    /**\n     * This is the element that we will listen to the real events on.\n     * @type {import(\"./PluggableMap.js\").default}\n     * @private\n     */\n    this.map_ = map;\n\n    /**\n     * @type {any}\n     * @private\n     */\n    this.clickTimeoutId_;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.dragging_ = false;\n\n    /**\n     * @type {!Array<import(\"./events.js\").EventsKey>}\n     * @private\n     */\n    this.dragListenerKeys_ = [];\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.moveTolerance_ = moveTolerance ?\n      moveTolerance * DEVICE_PIXEL_RATIO : DEVICE_PIXEL_RATIO;\n\n    /**\n     * The most recent \"down\" type event (or null if none have occurred).\n     * Set on pointerdown.\n     * @type {import(\"./pointer/PointerEvent.js\").default}\n     * @private\n     */\n    this.down_ = null;\n\n    var element = this.map_.getViewport();\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.activePointers_ = 0;\n\n    /**\n     * @type {!Object<number, boolean>}\n     * @private\n     */\n    this.trackedTouches_ = {};\n\n    /**\n     * Event handler which generates pointer events for\n     * the viewport element.\n     *\n     * @type {PointerEventHandler}\n     * @private\n     */\n    this.pointerEventHandler_ = new PointerEventHandler(element);\n\n    /**\n     * Event handler which generates pointer events for\n     * the document (used when dragging).\n     *\n     * @type {PointerEventHandler}\n     * @private\n     */\n    this.documentPointerEventHandler_ = null;\n\n    /**\n     * @type {?import(\"./events.js\").EventsKey}\n     * @private\n     */\n    this.pointerdownListenerKey_ = listen(this.pointerEventHandler_,\n      PointerEventType.POINTERDOWN,\n      this.handlePointerDown_, this);\n\n    /**\n     * @type {?import(\"./events.js\").EventsKey}\n     * @private\n     */\n    this.relayedListenerKey_ = listen(this.pointerEventHandler_,\n      PointerEventType.POINTERMOVE,\n      this.relayEvent_, this);\n\n  }\n\n  if ( EventTarget ) MapBrowserEventHandler.__proto__ = EventTarget;\n  MapBrowserEventHandler.prototype = Object.create( EventTarget && EventTarget.prototype );\n  MapBrowserEventHandler.prototype.constructor = MapBrowserEventHandler;\n\n  /**\n   * @param {import(\"./pointer/PointerEvent.js\").default} pointerEvent Pointer\n   * event.\n   * @private\n   */\n  MapBrowserEventHandler.prototype.emulateClick_ = function emulateClick_ (pointerEvent) {\n    var newEvent = new MapBrowserPointerEvent(\n      MapBrowserEventType.CLICK, this.map_, pointerEvent);\n    this.dispatchEvent(newEvent);\n    if (this.clickTimeoutId_ !== undefined) {\n      // double-click\n      clearTimeout(this.clickTimeoutId_);\n      this.clickTimeoutId_ = undefined;\n      newEvent = new MapBrowserPointerEvent(\n        MapBrowserEventType.DBLCLICK, this.map_, pointerEvent);\n      this.dispatchEvent(newEvent);\n    } else {\n      // click\n      this.clickTimeoutId_ = setTimeout(function() {\n        this.clickTimeoutId_ = undefined;\n        var newEvent = new MapBrowserPointerEvent(\n          MapBrowserEventType.SINGLECLICK, this.map_, pointerEvent);\n        this.dispatchEvent(newEvent);\n      }.bind(this), 250);\n    }\n  };\n\n  /**\n   * Keeps track on how many pointers are currently active.\n   *\n   * @param {import(\"./pointer/PointerEvent.js\").default} pointerEvent Pointer\n   * event.\n   * @private\n   */\n  MapBrowserEventHandler.prototype.updateActivePointers_ = function updateActivePointers_ (pointerEvent) {\n    var event = pointerEvent;\n\n    if (event.type == MapBrowserEventType.POINTERUP ||\n        event.type == MapBrowserEventType.POINTERCANCEL) {\n      delete this.trackedTouches_[event.pointerId];\n    } else if (event.type == MapBrowserEventType.POINTERDOWN) {\n      this.trackedTouches_[event.pointerId] = true;\n    }\n    this.activePointers_ = Object.keys(this.trackedTouches_).length;\n  };\n\n  /**\n   * @param {import(\"./pointer/PointerEvent.js\").default} pointerEvent Pointer\n   * event.\n   * @private\n   */\n  MapBrowserEventHandler.prototype.handlePointerUp_ = function handlePointerUp_ (pointerEvent) {\n    this.updateActivePointers_(pointerEvent);\n    var newEvent = new MapBrowserPointerEvent(\n      MapBrowserEventType.POINTERUP, this.map_, pointerEvent);\n    this.dispatchEvent(newEvent);\n\n    // We emulate click events on left mouse button click, touch contact, and pen\n    // contact. isMouseActionButton returns true in these cases (evt.button is set\n    // to 0).\n    // See http://www.w3.org/TR/pointerevents/#button-states\n    // We only fire click, singleclick, and doubleclick if nobody has called\n    // event.stopPropagation() or event.preventDefault().\n    if (!newEvent.propagationStopped && !this.dragging_ && this.isMouseActionButton_(pointerEvent)) {\n      this.emulateClick_(this.down_);\n    }\n\n    if (this.activePointers_ === 0) {\n      this.dragListenerKeys_.forEach(unlistenByKey);\n      this.dragListenerKeys_.length = 0;\n      this.dragging_ = false;\n      this.down_ = null;\n      this.documentPointerEventHandler_.dispose();\n      this.documentPointerEventHandler_ = null;\n    }\n  };\n\n  /**\n   * @param {import(\"./pointer/PointerEvent.js\").default} pointerEvent Pointer\n   * event.\n   * @return {boolean} If the left mouse button was pressed.\n   * @private\n   */\n  MapBrowserEventHandler.prototype.isMouseActionButton_ = function isMouseActionButton_ (pointerEvent) {\n    return pointerEvent.button === 0;\n  };\n\n  /**\n   * @param {import(\"./pointer/PointerEvent.js\").default} pointerEvent Pointer\n   * event.\n   * @private\n   */\n  MapBrowserEventHandler.prototype.handlePointerDown_ = function handlePointerDown_ (pointerEvent) {\n    this.updateActivePointers_(pointerEvent);\n    var newEvent = new MapBrowserPointerEvent(\n      MapBrowserEventType.POINTERDOWN, this.map_, pointerEvent);\n    this.dispatchEvent(newEvent);\n\n    this.down_ = pointerEvent;\n\n    if (this.dragListenerKeys_.length === 0) {\n      /* Set up a pointer event handler on the `document`,\n       * which is required when the pointer is moved outside\n       * the viewport when dragging.\n       */\n      this.documentPointerEventHandler_ =\n          new PointerEventHandler(document);\n\n      this.dragListenerKeys_.push(\n        listen(this.documentPointerEventHandler_,\n          MapBrowserEventType.POINTERMOVE,\n          this.handlePointerMove_, this),\n        listen(this.documentPointerEventHandler_,\n          MapBrowserEventType.POINTERUP,\n          this.handlePointerUp_, this),\n        /* Note that the listener for `pointercancel is set up on\n         * `pointerEventHandler_` and not `documentPointerEventHandler_` like\n         * the `pointerup` and `pointermove` listeners.\n         *\n         * The reason for this is the following: `TouchSource.vacuumTouches_()`\n         * issues `pointercancel` events, when there was no `touchend` for a\n         * `touchstart`. Now, let's say a first `touchstart` is registered on\n         * `pointerEventHandler_`. The `documentPointerEventHandler_` is set up.\n         * But `documentPointerEventHandler_` doesn't know about the first\n         * `touchstart`. If there is no `touchend` for the `touchstart`, we can\n         * only receive a `touchcancel` from `pointerEventHandler_`, because it is\n         * only registered there.\n         */\n        listen(this.pointerEventHandler_,\n          MapBrowserEventType.POINTERCANCEL,\n          this.handlePointerUp_, this)\n      );\n    }\n  };\n\n  /**\n   * @param {import(\"./pointer/PointerEvent.js\").default} pointerEvent Pointer\n   * event.\n   * @private\n   */\n  MapBrowserEventHandler.prototype.handlePointerMove_ = function handlePointerMove_ (pointerEvent) {\n    // Between pointerdown and pointerup, pointermove events are triggered.\n    // To avoid a 'false' touchmove event to be dispatched, we test if the pointer\n    // moved a significant distance.\n    if (this.isMoving_(pointerEvent)) {\n      this.dragging_ = true;\n      var newEvent = new MapBrowserPointerEvent(\n        MapBrowserEventType.POINTERDRAG, this.map_, pointerEvent,\n        this.dragging_);\n      this.dispatchEvent(newEvent);\n    }\n\n    // Some native android browser triggers mousemove events during small period\n    // of time. See: https://code.google.com/p/android/issues/detail?id=5491 or\n    // https://code.google.com/p/android/issues/detail?id=19827\n    // ex: Galaxy Tab P3110 + Android 4.1.1\n    pointerEvent.preventDefault();\n  };\n\n  /**\n   * Wrap and relay a pointer event.  Note that this requires that the type\n   * string for the MapBrowserPointerEvent matches the PointerEvent type.\n   * @param {import(\"./pointer/PointerEvent.js\").default} pointerEvent Pointer\n   * event.\n   * @private\n   */\n  MapBrowserEventHandler.prototype.relayEvent_ = function relayEvent_ (pointerEvent) {\n    var dragging = !!(this.down_ && this.isMoving_(pointerEvent));\n    this.dispatchEvent(new MapBrowserPointerEvent(\n      pointerEvent.type, this.map_, pointerEvent, dragging));\n  };\n\n  /**\n   * @param {import(\"./pointer/PointerEvent.js\").default} pointerEvent Pointer\n   * event.\n   * @return {boolean} Is moving.\n   * @private\n   */\n  MapBrowserEventHandler.prototype.isMoving_ = function isMoving_ (pointerEvent) {\n    return this.dragging_ ||\n        Math.abs(pointerEvent.clientX - this.down_.clientX) > this.moveTolerance_ ||\n        Math.abs(pointerEvent.clientY - this.down_.clientY) > this.moveTolerance_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  MapBrowserEventHandler.prototype.disposeInternal = function disposeInternal () {\n    if (this.relayedListenerKey_) {\n      unlistenByKey(this.relayedListenerKey_);\n      this.relayedListenerKey_ = null;\n    }\n    if (this.pointerdownListenerKey_) {\n      unlistenByKey(this.pointerdownListenerKey_);\n      this.pointerdownListenerKey_ = null;\n    }\n\n    this.dragListenerKeys_.forEach(unlistenByKey);\n    this.dragListenerKeys_.length = 0;\n\n    if (this.documentPointerEventHandler_) {\n      this.documentPointerEventHandler_.dispose();\n      this.documentPointerEventHandler_ = null;\n    }\n    if (this.pointerEventHandler_) {\n      this.pointerEventHandler_.dispose();\n      this.pointerEventHandler_ = null;\n    }\n    EventTarget.prototype.disposeInternal.call(this);\n  };\n\n  return MapBrowserEventHandler;\n}(EventTarget));\n\n\nexport default MapBrowserEventHandler;\n\n//# sourceMappingURL=MapBrowserEventHandler.js.map","/**\n * @module ol/MapProperty\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  LAYERGROUP: 'layergroup',\n  SIZE: 'size',\n  TARGET: 'target',\n  VIEW: 'view'\n};\n\n//# sourceMappingURL=MapProperty.js.map","/**\n * @module ol/render/EventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  /**\n   * @event module:ol/render/Event~RenderEvent#postcompose\n   * @api\n   */\n  POSTCOMPOSE: 'postcompose',\n  /**\n   * @event module:ol/render/Event~RenderEvent#precompose\n   * @api\n   */\n  PRECOMPOSE: 'precompose',\n  /**\n   * @event module:ol/render/Event~RenderEvent#render\n   * @api\n   */\n  RENDER: 'render',\n  /**\n   * Triggered when rendering is complete, i.e. all sources and tiles have\n   * finished loading for the current viewport, and all tiles are faded in.\n   * @event module:ol/render/Event~RenderEvent#rendercomplete\n   * @api\n   */\n  RENDERCOMPLETE: 'rendercomplete'\n};\n\n//# sourceMappingURL=EventType.js.map","/**\n * @module ol/TileState\n */\n\n/**\n * @enum {number}\n */\nexport default {\n  IDLE: 0,\n  LOADING: 1,\n  LOADED: 2,\n  /**\n   * Indicates that tile loading failed\n   * @type {number}\n   */\n  ERROR: 3,\n  EMPTY: 4,\n  ABORT: 5\n};\n\n//# sourceMappingURL=TileState.js.map","/**\n * @module ol/asserts\n */\nimport AssertionError from './AssertionError.js';\n\n/**\n * @param {*} assertion Assertion we expected to be truthy.\n * @param {number} errorCode Error code.\n */\nexport function assert(assertion, errorCode) {\n  if (!assertion) {\n    throw new AssertionError(errorCode);\n  }\n}\n\n//# sourceMappingURL=asserts.js.map","/**\n * @module ol/structs/PriorityQueue\n */\nimport {assert} from '../asserts.js';\nimport {clear} from '../obj.js';\n\n\n/**\n * @type {number}\n */\nexport var DROP = Infinity;\n\n\n/**\n * @classdesc\n * Priority queue.\n *\n * The implementation is inspired from the Closure Library's Heap class and\n * Python's heapq module.\n *\n * See http://closure-library.googlecode.com/svn/docs/closure_goog_structs_heap.js.source.html\n * and http://hg.python.org/cpython/file/2.7/Lib/heapq.py.\n *\n * @template T\n */\nvar PriorityQueue = function PriorityQueue(priorityFunction, keyFunction) {\n\n  /**\n   * @type {function(T): number}\n   * @private\n   */\n  this.priorityFunction_ = priorityFunction;\n\n  /**\n   * @type {function(T): string}\n   * @private\n   */\n  this.keyFunction_ = keyFunction;\n\n  /**\n   * @type {Array<T>}\n   * @private\n   */\n  this.elements_ = [];\n\n  /**\n   * @type {Array<number>}\n   * @private\n   */\n  this.priorities_ = [];\n\n  /**\n   * @type {!Object<string, boolean>}\n   * @private\n   */\n  this.queuedElements_ = {};\n\n};\n\n/**\n * FIXME empty description for jsdoc\n */\nPriorityQueue.prototype.clear = function clear$1 () {\n  this.elements_.length = 0;\n  this.priorities_.length = 0;\n  clear(this.queuedElements_);\n};\n\n\n/**\n * Remove and return the highest-priority element. O(log N).\n * @return {T} Element.\n */\nPriorityQueue.prototype.dequeue = function dequeue () {\n  var elements = this.elements_;\n  var priorities = this.priorities_;\n  var element = elements[0];\n  if (elements.length == 1) {\n    elements.length = 0;\n    priorities.length = 0;\n  } else {\n    elements[0] = elements.pop();\n    priorities[0] = priorities.pop();\n    this.siftUp_(0);\n  }\n  var elementKey = this.keyFunction_(element);\n  delete this.queuedElements_[elementKey];\n  return element;\n};\n\n\n/**\n * Enqueue an element. O(log N).\n * @param {T} element Element.\n * @return {boolean} The element was added to the queue.\n */\nPriorityQueue.prototype.enqueue = function enqueue (element) {\n  assert(!(this.keyFunction_(element) in this.queuedElements_),\n    31); // Tried to enqueue an `element` that was already added to the queue\n  var priority = this.priorityFunction_(element);\n  if (priority != DROP) {\n    this.elements_.push(element);\n    this.priorities_.push(priority);\n    this.queuedElements_[this.keyFunction_(element)] = true;\n    this.siftDown_(0, this.elements_.length - 1);\n    return true;\n  }\n  return false;\n};\n\n\n/**\n * @return {number} Count.\n */\nPriorityQueue.prototype.getCount = function getCount () {\n  return this.elements_.length;\n};\n\n\n/**\n * Gets the index of the left child of the node at the given index.\n * @param {number} index The index of the node to get the left child for.\n * @return {number} The index of the left child.\n * @private\n */\nPriorityQueue.prototype.getLeftChildIndex_ = function getLeftChildIndex_ (index) {\n  return index * 2 + 1;\n};\n\n\n/**\n * Gets the index of the right child of the node at the given index.\n * @param {number} index The index of the node to get the right child for.\n * @return {number} The index of the right child.\n * @private\n */\nPriorityQueue.prototype.getRightChildIndex_ = function getRightChildIndex_ (index) {\n  return index * 2 + 2;\n};\n\n\n/**\n * Gets the index of the parent of the node at the given index.\n * @param {number} index The index of the node to get the parent for.\n * @return {number} The index of the parent.\n * @private\n */\nPriorityQueue.prototype.getParentIndex_ = function getParentIndex_ (index) {\n  return (index - 1) >> 1;\n};\n\n\n/**\n * Make this a heap. O(N).\n * @private\n */\nPriorityQueue.prototype.heapify_ = function heapify_ () {\n  var i;\n  for (i = (this.elements_.length >> 1) - 1; i >= 0; i--) {\n    this.siftUp_(i);\n  }\n};\n\n\n/**\n * @return {boolean} Is empty.\n */\nPriorityQueue.prototype.isEmpty = function isEmpty () {\n  return this.elements_.length === 0;\n};\n\n\n/**\n * @param {string} key Key.\n * @return {boolean} Is key queued.\n */\nPriorityQueue.prototype.isKeyQueued = function isKeyQueued (key) {\n  return key in this.queuedElements_;\n};\n\n\n/**\n * @param {T} element Element.\n * @return {boolean} Is queued.\n */\nPriorityQueue.prototype.isQueued = function isQueued (element) {\n  return this.isKeyQueued(this.keyFunction_(element));\n};\n\n\n/**\n * @param {number} index The index of the node to move down.\n * @private\n */\nPriorityQueue.prototype.siftUp_ = function siftUp_ (index) {\n  var elements = this.elements_;\n  var priorities = this.priorities_;\n  var count = elements.length;\n  var element = elements[index];\n  var priority = priorities[index];\n  var startIndex = index;\n\n  while (index < (count >> 1)) {\n    var lIndex = this.getLeftChildIndex_(index);\n    var rIndex = this.getRightChildIndex_(index);\n\n    var smallerChildIndex = rIndex < count &&\n        priorities[rIndex] < priorities[lIndex] ?\n      rIndex : lIndex;\n\n    elements[index] = elements[smallerChildIndex];\n    priorities[index] = priorities[smallerChildIndex];\n    index = smallerChildIndex;\n  }\n\n  elements[index] = element;\n  priorities[index] = priority;\n  this.siftDown_(startIndex, index);\n};\n\n\n/**\n * @param {number} startIndex The index of the root.\n * @param {number} index The index of the node to move up.\n * @private\n */\nPriorityQueue.prototype.siftDown_ = function siftDown_ (startIndex, index) {\n  var elements = this.elements_;\n  var priorities = this.priorities_;\n  var element = elements[index];\n  var priority = priorities[index];\n\n  while (index > startIndex) {\n    var parentIndex = this.getParentIndex_(index);\n    if (priorities[parentIndex] > priority) {\n      elements[index] = elements[parentIndex];\n      priorities[index] = priorities[parentIndex];\n      index = parentIndex;\n    } else {\n      break;\n    }\n  }\n  elements[index] = element;\n  priorities[index] = priority;\n};\n\n\n/**\n * FIXME empty description for jsdoc\n */\nPriorityQueue.prototype.reprioritize = function reprioritize () {\n  var priorityFunction = this.priorityFunction_;\n  var elements = this.elements_;\n  var priorities = this.priorities_;\n  var index = 0;\n  var n = elements.length;\n  var element, i, priority;\n  for (i = 0; i < n; ++i) {\n    element = elements[i];\n    priority = priorityFunction(element);\n    if (priority == DROP) {\n      delete this.queuedElements_[this.keyFunction_(element)];\n    } else {\n      priorities[index] = priority;\n      elements[index++] = element;\n    }\n  }\n  elements.length = index;\n  priorities.length = index;\n  this.heapify_();\n};\n\n\nexport default PriorityQueue;\n\n//# sourceMappingURL=PriorityQueue.js.map","/**\n * @module ol/TileQueue\n */\nimport TileState from './TileState.js';\nimport {listen, unlisten} from './events.js';\nimport EventType from './events/EventType.js';\nimport PriorityQueue from './structs/PriorityQueue.js';\n\n\n/**\n * @typedef {function(import(\"./Tile.js\").default, string, import(\"./coordinate.js\").Coordinate, number): number} PriorityFunction\n */\n\n\nvar TileQueue = /*@__PURE__*/(function (PriorityQueue) {\n  function TileQueue(tilePriorityFunction, tileChangeCallback) {\n\n    PriorityQueue.call(\n      /**\n       * @param {Array} element Element.\n       * @return {number} Priority.\n       */\n      this, function(element) {\n        return tilePriorityFunction.apply(null, element);\n      },\n      /**\n       * @param {Array} element Element.\n       * @return {string} Key.\n       */\n      function(element) {\n        return (/** @type {import(\"./Tile.js\").default} */ (element[0]).getKey());\n      });\n\n    /**\n     * @private\n     * @type {function(): ?}\n     */\n    this.tileChangeCallback_ = tileChangeCallback;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.tilesLoading_ = 0;\n\n    /**\n     * @private\n     * @type {!Object<string,boolean>}\n     */\n    this.tilesLoadingKeys_ = {};\n\n  }\n\n  if ( PriorityQueue ) TileQueue.__proto__ = PriorityQueue;\n  TileQueue.prototype = Object.create( PriorityQueue && PriorityQueue.prototype );\n  TileQueue.prototype.constructor = TileQueue;\n\n  /**\n   * @inheritDoc\n   */\n  TileQueue.prototype.enqueue = function enqueue (element) {\n    var added = PriorityQueue.prototype.enqueue.call(this, element);\n    if (added) {\n      var tile = element[0];\n      listen(tile, EventType.CHANGE, this.handleTileChange, this);\n    }\n    return added;\n  };\n\n  /**\n   * @return {number} Number of tiles loading.\n   */\n  TileQueue.prototype.getTilesLoading = function getTilesLoading () {\n    return this.tilesLoading_;\n  };\n\n  /**\n   * @param {import(\"./events/Event.js\").default} event Event.\n   * @protected\n   */\n  TileQueue.prototype.handleTileChange = function handleTileChange (event) {\n    var tile = /** @type {import(\"./Tile.js\").default} */ (event.target);\n    var state = tile.getState();\n    if (state === TileState.LOADED || state === TileState.ERROR ||\n        state === TileState.EMPTY || state === TileState.ABORT) {\n      unlisten(tile, EventType.CHANGE, this.handleTileChange, this);\n      var tileKey = tile.getKey();\n      if (tileKey in this.tilesLoadingKeys_) {\n        delete this.tilesLoadingKeys_[tileKey];\n        --this.tilesLoading_;\n      }\n      this.tileChangeCallback_();\n    }\n  };\n\n  /**\n   * @param {number} maxTotalLoading Maximum number tiles to load simultaneously.\n   * @param {number} maxNewLoads Maximum number of new tiles to load.\n   */\n  TileQueue.prototype.loadMoreTiles = function loadMoreTiles (maxTotalLoading, maxNewLoads) {\n    var newLoads = 0;\n    var abortedTiles = false;\n    var state, tile, tileKey;\n    while (this.tilesLoading_ < maxTotalLoading && newLoads < maxNewLoads &&\n           this.getCount() > 0) {\n      tile = /** @type {import(\"./Tile.js\").default} */ (this.dequeue()[0]);\n      tileKey = tile.getKey();\n      state = tile.getState();\n      if (state === TileState.ABORT) {\n        abortedTiles = true;\n      } else if (state === TileState.IDLE && !(tileKey in this.tilesLoadingKeys_)) {\n        this.tilesLoadingKeys_[tileKey] = true;\n        ++this.tilesLoading_;\n        ++newLoads;\n        tile.load();\n      }\n    }\n    if (newLoads === 0 && abortedTiles) {\n      // Do not stop the render loop when all wanted tiles were aborted due to\n      // a small, saturated tile cache.\n      this.tileChangeCallback_();\n    }\n  };\n\n  return TileQueue;\n}(PriorityQueue));\n\n\nexport default TileQueue;\n\n//# sourceMappingURL=TileQueue.js.map","/**\n * @module ol/tilegrid/common\n */\n\n/**\n * Default maximum zoom for default tile grids.\n * @type {number}\n */\nexport var DEFAULT_MAX_ZOOM = 42;\n\n/**\n * Default tile size.\n * @type {number}\n */\nexport var DEFAULT_TILE_SIZE = 256;\n\n//# sourceMappingURL=common.js.map","/**\n * @module ol/math\n */\nimport {assert} from './asserts.js';\n\n/**\n * Takes a number and clamps it to within the provided bounds.\n * @param {number} value The input number.\n * @param {number} min The minimum value to return.\n * @param {number} max The maximum value to return.\n * @return {number} The input number if it is within bounds, or the nearest\n *     number within the bounds.\n */\nexport function clamp(value, min, max) {\n  return Math.min(Math.max(value, min), max);\n}\n\n\n/**\n * Return the hyperbolic cosine of a given number. The method will use the\n * native `Math.cosh` function if it is available, otherwise the hyperbolic\n * cosine will be calculated via the reference implementation of the Mozilla\n * developer network.\n *\n * @param {number} x X.\n * @return {number} Hyperbolic cosine of x.\n */\nexport var cosh = (function() {\n  // Wrapped in a iife, to save the overhead of checking for the native\n  // implementation on every invocation.\n  var cosh;\n  if ('cosh' in Math) {\n    // The environment supports the native Math.cosh function, use it…\n    cosh = Math.cosh;\n  } else {\n    // … else, use the reference implementation of MDN:\n    cosh = function(x) {\n      var y = /** @type {Math} */ (Math).exp(x);\n      return (y + 1 / y) / 2;\n    };\n  }\n  return cosh;\n}());\n\n\n/**\n * @param {number} x X.\n * @return {number} The smallest power of two greater than or equal to x.\n */\nexport function roundUpToPowerOfTwo(x) {\n  assert(0 < x, 29); // `x` must be greater than `0`\n  return Math.pow(2, Math.ceil(Math.log(x) / Math.LN2));\n}\n\n\n/**\n * Returns the square of the closest distance between the point (x, y) and the\n * line segment (x1, y1) to (x2, y2).\n * @param {number} x X.\n * @param {number} y Y.\n * @param {number} x1 X1.\n * @param {number} y1 Y1.\n * @param {number} x2 X2.\n * @param {number} y2 Y2.\n * @return {number} Squared distance.\n */\nexport function squaredSegmentDistance(x, y, x1, y1, x2, y2) {\n  var dx = x2 - x1;\n  var dy = y2 - y1;\n  if (dx !== 0 || dy !== 0) {\n    var t = ((x - x1) * dx + (y - y1) * dy) / (dx * dx + dy * dy);\n    if (t > 1) {\n      x1 = x2;\n      y1 = y2;\n    } else if (t > 0) {\n      x1 += dx * t;\n      y1 += dy * t;\n    }\n  }\n  return squaredDistance(x, y, x1, y1);\n}\n\n\n/**\n * Returns the square of the distance between the points (x1, y1) and (x2, y2).\n * @param {number} x1 X1.\n * @param {number} y1 Y1.\n * @param {number} x2 X2.\n * @param {number} y2 Y2.\n * @return {number} Squared distance.\n */\nexport function squaredDistance(x1, y1, x2, y2) {\n  var dx = x2 - x1;\n  var dy = y2 - y1;\n  return dx * dx + dy * dy;\n}\n\n\n/**\n * Solves system of linear equations using Gaussian elimination method.\n *\n * @param {Array<Array<number>>} mat Augmented matrix (n x n + 1 column)\n *                                     in row-major order.\n * @return {Array<number>} The resulting vector.\n */\nexport function solveLinearSystem(mat) {\n  var n = mat.length;\n\n  for (var i = 0; i < n; i++) {\n    // Find max in the i-th column (ignoring i - 1 first rows)\n    var maxRow = i;\n    var maxEl = Math.abs(mat[i][i]);\n    for (var r = i + 1; r < n; r++) {\n      var absValue = Math.abs(mat[r][i]);\n      if (absValue > maxEl) {\n        maxEl = absValue;\n        maxRow = r;\n      }\n    }\n\n    if (maxEl === 0) {\n      return null; // matrix is singular\n    }\n\n    // Swap max row with i-th (current) row\n    var tmp = mat[maxRow];\n    mat[maxRow] = mat[i];\n    mat[i] = tmp;\n\n    // Subtract the i-th row to make all the remaining rows 0 in the i-th column\n    for (var j = i + 1; j < n; j++) {\n      var coef = -mat[j][i] / mat[i][i];\n      for (var k = i; k < n + 1; k++) {\n        if (i == k) {\n          mat[j][k] = 0;\n        } else {\n          mat[j][k] += coef * mat[i][k];\n        }\n      }\n    }\n  }\n\n  // Solve Ax=b for upper triangular matrix A (mat)\n  var x = new Array(n);\n  for (var l = n - 1; l >= 0; l--) {\n    x[l] = mat[l][n] / mat[l][l];\n    for (var m = l - 1; m >= 0; m--) {\n      mat[m][n] -= mat[m][l] * x[l];\n    }\n  }\n  return x;\n}\n\n\n/**\n * Converts radians to to degrees.\n *\n * @param {number} angleInRadians Angle in radians.\n * @return {number} Angle in degrees.\n */\nexport function toDegrees(angleInRadians) {\n  return angleInRadians * 180 / Math.PI;\n}\n\n\n/**\n * Converts degrees to radians.\n *\n * @param {number} angleInDegrees Angle in degrees.\n * @return {number} Angle in radians.\n */\nexport function toRadians(angleInDegrees) {\n  return angleInDegrees * Math.PI / 180;\n}\n\n/**\n * Returns the modulo of a / b, depending on the sign of b.\n *\n * @param {number} a Dividend.\n * @param {number} b Divisor.\n * @return {number} Modulo.\n */\nexport function modulo(a, b) {\n  var r = a % b;\n  return r * b < 0 ? r + b : r;\n}\n\n/**\n * Calculates the linearly interpolated value of x between a and b.\n *\n * @param {number} a Number\n * @param {number} b Number\n * @param {number} x Value to be interpolated.\n * @return {number} Interpolated value.\n */\nexport function lerp(a, b, x) {\n  return a + x * (b - a);\n}\n\n//# sourceMappingURL=math.js.map","/**\n * @module ol/centerconstraint\n */\nimport {clamp} from './math.js';\n\n\n/**\n * @typedef {function((import(\"./coordinate.js\").Coordinate|undefined)): (import(\"./coordinate.js\").Coordinate|undefined)} Type\n */\n\n\n/**\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @return {Type} The constraint.\n */\nexport function createExtent(extent) {\n  return (\n    /**\n     * @param {import(\"./coordinate.js\").Coordinate=} center Center.\n     * @return {import(\"./coordinate.js\").Coordinate|undefined} Center.\n     */\n    function(center) {\n      if (center) {\n        return [\n          clamp(center[0], extent[0], extent[2]),\n          clamp(center[1], extent[1], extent[3])\n        ];\n      } else {\n        return undefined;\n      }\n    }\n  );\n}\n\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate=} center Center.\n * @return {import(\"./coordinate.js\").Coordinate|undefined} Center.\n */\nexport function none(center) {\n  return center;\n}\n\n//# sourceMappingURL=centerconstraint.js.map","/**\n * @module ol/resolutionconstraint\n */\nimport {linearFindNearest} from './array.js';\nimport {clamp} from './math.js';\n\n\n/**\n * @typedef {function((number|undefined), number, number): (number|undefined)} Type\n */\n\n\n/**\n * @param {Array<number>} resolutions Resolutions.\n * @return {Type} Zoom function.\n */\nexport function createSnapToResolutions(resolutions) {\n  return (\n    /**\n     * @param {number|undefined} resolution Resolution.\n     * @param {number} delta Delta.\n     * @param {number} direction Direction.\n     * @return {number|undefined} Resolution.\n     */\n    function(resolution, delta, direction) {\n      if (resolution !== undefined) {\n        var z = linearFindNearest(resolutions, resolution, direction);\n        z = clamp(z + delta, 0, resolutions.length - 1);\n        var index = Math.floor(z);\n        if (z != index && index < resolutions.length - 1) {\n          var power = resolutions[index] / resolutions[index + 1];\n          return resolutions[index] / Math.pow(power, z - index);\n        } else {\n          return resolutions[index];\n        }\n      } else {\n        return undefined;\n      }\n    }\n  );\n}\n\n\n/**\n * @param {number} power Power.\n * @param {number} maxResolution Maximum resolution.\n * @param {number=} opt_maxLevel Maximum level.\n * @return {Type} Zoom function.\n */\nexport function createSnapToPower(power, maxResolution, opt_maxLevel) {\n  return (\n    /**\n     * @param {number|undefined} resolution Resolution.\n     * @param {number} delta Delta.\n     * @param {number} direction Direction.\n     * @return {number|undefined} Resolution.\n     */\n    function(resolution, delta, direction) {\n      if (resolution !== undefined) {\n        var offset = -direction / 2 + 0.5;\n        var oldLevel = Math.floor(\n          Math.log(maxResolution / resolution) / Math.log(power) + offset);\n        var newLevel = Math.max(oldLevel + delta, 0);\n        if (opt_maxLevel !== undefined) {\n          newLevel = Math.min(newLevel, opt_maxLevel);\n        }\n        return maxResolution / Math.pow(power, newLevel);\n      } else {\n        return undefined;\n      }\n    });\n}\n\n//# sourceMappingURL=resolutionconstraint.js.map","/**\n * @module ol/rotationconstraint\n */\nimport {toRadians} from './math.js';\n\n\n/**\n * @typedef {function((number|undefined), number): (number|undefined)} Type\n */\n\n\n/**\n * @param {number|undefined} rotation Rotation.\n * @param {number} delta Delta.\n * @return {number|undefined} Rotation.\n */\nexport function disable(rotation, delta) {\n  if (rotation !== undefined) {\n    return 0;\n  } else {\n    return undefined;\n  }\n}\n\n\n/**\n * @param {number|undefined} rotation Rotation.\n * @param {number} delta Delta.\n * @return {number|undefined} Rotation.\n */\nexport function none(rotation, delta) {\n  if (rotation !== undefined) {\n    return rotation + delta;\n  } else {\n    return undefined;\n  }\n}\n\n\n/**\n * @param {number} n N.\n * @return {Type} Rotation constraint.\n */\nexport function createSnapToN(n) {\n  var theta = 2 * Math.PI / n;\n  return (\n    /**\n     * @param {number|undefined} rotation Rotation.\n     * @param {number} delta Delta.\n     * @return {number|undefined} Rotation.\n     */\n    function(rotation, delta) {\n      if (rotation !== undefined) {\n        rotation = Math.floor((rotation + delta) / theta + 0.5) * theta;\n        return rotation;\n      } else {\n        return undefined;\n      }\n    });\n}\n\n\n/**\n * @param {number=} opt_tolerance Tolerance.\n * @return {Type} Rotation constraint.\n */\nexport function createSnapToZero(opt_tolerance) {\n  var tolerance = opt_tolerance || toRadians(5);\n  return (\n    /**\n     * @param {number|undefined} rotation Rotation.\n     * @param {number} delta Delta.\n     * @return {number|undefined} Rotation.\n     */\n    function(rotation, delta) {\n      if (rotation !== undefined) {\n        if (Math.abs(rotation + delta) <= tolerance) {\n          return 0;\n        } else {\n          return rotation + delta;\n        }\n      } else {\n        return undefined;\n      }\n    });\n}\n\n//# sourceMappingURL=rotationconstraint.js.map","/**\n * @module ol/ViewHint\n */\n\n/**\n * @enum {number}\n */\nexport default {\n  ANIMATING: 0,\n  INTERACTING: 1\n};\n\n//# sourceMappingURL=ViewHint.js.map","/**\n * @module ol/ViewProperty\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  CENTER: 'center',\n  RESOLUTION: 'resolution',\n  ROTATION: 'rotation'\n};\n\n//# sourceMappingURL=ViewProperty.js.map","/**\n * @module ol/string\n */\n\n/**\n * @param {number} number Number to be formatted\n * @param {number} width The desired width\n * @param {number=} opt_precision Precision of the output string (i.e. number of decimal places)\n * @returns {string} Formatted string\n */\nexport function padNumber(number, width, opt_precision) {\n  var numberString = opt_precision !== undefined ? number.toFixed(opt_precision) : '' + number;\n  var decimal = numberString.indexOf('.');\n  decimal = decimal === -1 ? numberString.length : decimal;\n  return decimal > width ? numberString : new Array(1 + width - decimal).join('0') + numberString;\n}\n\n\n/**\n * Adapted from https://github.com/omichelsen/compare-versions/blob/master/index.js\n * @param {string|number} v1 First version\n * @param {string|number} v2 Second version\n * @returns {number} Value\n */\nexport function compareVersions(v1, v2) {\n  var s1 = ('' + v1).split('.');\n  var s2 = ('' + v2).split('.');\n\n  for (var i = 0; i < Math.max(s1.length, s2.length); i++) {\n    var n1 = parseInt(s1[i] || '0', 10);\n    var n2 = parseInt(s2[i] || '0', 10);\n\n    if (n1 > n2) {\n      return 1;\n    }\n    if (n2 > n1) {\n      return -1;\n    }\n  }\n\n  return 0;\n}\n\n//# sourceMappingURL=string.js.map","/**\n * @module ol/coordinate\n */\nimport {modulo} from './math.js';\nimport {padNumber} from './string.js';\n\n\n/**\n * An array of numbers representing an xy coordinate. Example: `[16, 48]`.\n * @typedef {Array<number>} Coordinate\n * @api\n */\n\n\n/**\n * A function that takes a {@link module:ol/coordinate~Coordinate} and\n * transforms it into a `{string}`.\n *\n * @typedef {function((Coordinate|undefined)): string} CoordinateFormat\n * @api\n */\n\n\n/**\n * Add `delta` to `coordinate`. `coordinate` is modified in place and returned\n * by the function.\n *\n * Example:\n *\n *     import {add} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     add(coord, [-2, 4]);\n *     // coord is now [5.85, 51.983333]\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {Coordinate} delta Delta.\n * @return {Coordinate} The input coordinate adjusted by\n * the given delta.\n * @api\n */\nexport function add(coordinate, delta) {\n  coordinate[0] += delta[0];\n  coordinate[1] += delta[1];\n  return coordinate;\n}\n\n\n/**\n * Calculates the point closest to the passed coordinate on the passed circle.\n *\n * @param {Coordinate} coordinate The coordinate.\n * @param {import(\"./geom/Circle.js\").default} circle The circle.\n * @return {Coordinate} Closest point on the circumference.\n */\nexport function closestOnCircle(coordinate, circle) {\n  var r = circle.getRadius();\n  var center = circle.getCenter();\n  var x0 = center[0];\n  var y0 = center[1];\n  var x1 = coordinate[0];\n  var y1 = coordinate[1];\n\n  var dx = x1 - x0;\n  var dy = y1 - y0;\n  if (dx === 0 && dy === 0) {\n    dx = 1;\n  }\n  var d = Math.sqrt(dx * dx + dy * dy);\n\n  var x = x0 + r * dx / d;\n  var y = y0 + r * dy / d;\n\n  return [x, y];\n}\n\n\n/**\n * Calculates the point closest to the passed coordinate on the passed segment.\n * This is the foot of the perpendicular of the coordinate to the segment when\n * the foot is on the segment, or the closest segment coordinate when the foot\n * is outside the segment.\n *\n * @param {Coordinate} coordinate The coordinate.\n * @param {Array<Coordinate>} segment The two coordinates\n * of the segment.\n * @return {Coordinate} The foot of the perpendicular of\n * the coordinate to the segment.\n */\nexport function closestOnSegment(coordinate, segment) {\n  var x0 = coordinate[0];\n  var y0 = coordinate[1];\n  var start = segment[0];\n  var end = segment[1];\n  var x1 = start[0];\n  var y1 = start[1];\n  var x2 = end[0];\n  var y2 = end[1];\n  var dx = x2 - x1;\n  var dy = y2 - y1;\n  var along = (dx === 0 && dy === 0) ? 0 :\n    ((dx * (x0 - x1)) + (dy * (y0 - y1))) / ((dx * dx + dy * dy) || 0);\n  var x, y;\n  if (along <= 0) {\n    x = x1;\n    y = y1;\n  } else if (along >= 1) {\n    x = x2;\n    y = y2;\n  } else {\n    x = x1 + along * dx;\n    y = y1 + along * dy;\n  }\n  return [x, y];\n}\n\n\n/**\n * Returns a {@link module:ol/coordinate~CoordinateFormat} function that can be\n * used to format\n * a {Coordinate} to a string.\n *\n * Example without specifying the fractional digits:\n *\n *     import {createStringXY} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     var stringifyFunc = createStringXY();\n *     var out = stringifyFunc(coord);\n *     // out is now '8, 48'\n *\n * Example with explicitly specifying 2 fractional digits:\n *\n *     import {createStringXY} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     var stringifyFunc = createStringXY(2);\n *     var out = stringifyFunc(coord);\n *     // out is now '7.85, 47.98'\n *\n * @param {number=} opt_fractionDigits The number of digits to include\n *    after the decimal point. Default is `0`.\n * @return {CoordinateFormat} Coordinate format.\n * @api\n */\nexport function createStringXY(opt_fractionDigits) {\n  return (\n    /**\n     * @param {Coordinate} coordinate Coordinate.\n     * @return {string} String XY.\n     */\n    function(coordinate) {\n      return toStringXY(coordinate, opt_fractionDigits);\n    }\n  );\n}\n\n\n/**\n * @param {string} hemispheres Hemispheres.\n * @param {number} degrees Degrees.\n * @param {number=} opt_fractionDigits The number of digits to include\n *    after the decimal point. Default is `0`.\n * @return {string} String.\n */\nexport function degreesToStringHDMS(hemispheres, degrees, opt_fractionDigits) {\n  var normalizedDegrees = modulo(degrees + 180, 360) - 180;\n  var x = Math.abs(3600 * normalizedDegrees);\n  var dflPrecision = opt_fractionDigits || 0;\n  var precision = Math.pow(10, dflPrecision);\n\n  var deg = Math.floor(x / 3600);\n  var min = Math.floor((x - deg * 3600) / 60);\n  var sec = x - (deg * 3600) - (min * 60);\n  sec = Math.ceil(sec * precision) / precision;\n\n  if (sec >= 60) {\n    sec = 0;\n    min += 1;\n  }\n\n  if (min >= 60) {\n    min = 0;\n    deg += 1;\n  }\n\n  return deg + '\\u00b0 ' + padNumber(min, 2) + '\\u2032 ' +\n    padNumber(sec, 2, dflPrecision) + '\\u2033' +\n    (normalizedDegrees == 0 ? '' : ' ' + hemispheres.charAt(normalizedDegrees < 0 ? 1 : 0));\n}\n\n\n/**\n * Transforms the given {@link module:ol/coordinate~Coordinate} to a string\n * using the given string template. The strings `{x}` and `{y}` in the template\n * will be replaced with the first and second coordinate values respectively.\n *\n * Example without specifying the fractional digits:\n *\n *     import {format} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     var template = 'Coordinate is ({x}|{y}).';\n *     var out = format(coord, template);\n *     // out is now 'Coordinate is (8|48).'\n *\n * Example explicitly specifying the fractional digits:\n *\n *     import {format} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     var template = 'Coordinate is ({x}|{y}).';\n *     var out = format(coord, template, 2);\n *     // out is now 'Coordinate is (7.85|47.98).'\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {string} template A template string with `{x}` and `{y}` placeholders\n *     that will be replaced by first and second coordinate values.\n * @param {number=} opt_fractionDigits The number of digits to include\n *    after the decimal point. Default is `0`.\n * @return {string} Formatted coordinate.\n * @api\n */\nexport function format(coordinate, template, opt_fractionDigits) {\n  if (coordinate) {\n    return template\n      .replace('{x}', coordinate[0].toFixed(opt_fractionDigits))\n      .replace('{y}', coordinate[1].toFixed(opt_fractionDigits));\n  } else {\n    return '';\n  }\n}\n\n\n/**\n * @param {Coordinate} coordinate1 First coordinate.\n * @param {Coordinate} coordinate2 Second coordinate.\n * @return {boolean} The two coordinates are equal.\n */\nexport function equals(coordinate1, coordinate2) {\n  var equals = true;\n  for (var i = coordinate1.length - 1; i >= 0; --i) {\n    if (coordinate1[i] != coordinate2[i]) {\n      equals = false;\n      break;\n    }\n  }\n  return equals;\n}\n\n\n/**\n * Rotate `coordinate` by `angle`. `coordinate` is modified in place and\n * returned by the function.\n *\n * Example:\n *\n *     import {rotate} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     var rotateRadians = Math.PI / 2; // 90 degrees\n *     rotate(coord, rotateRadians);\n *     // coord is now [-47.983333, 7.85]\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number} angle Angle in radian.\n * @return {Coordinate} Coordinate.\n * @api\n */\nexport function rotate(coordinate, angle) {\n  var cosAngle = Math.cos(angle);\n  var sinAngle = Math.sin(angle);\n  var x = coordinate[0] * cosAngle - coordinate[1] * sinAngle;\n  var y = coordinate[1] * cosAngle + coordinate[0] * sinAngle;\n  coordinate[0] = x;\n  coordinate[1] = y;\n  return coordinate;\n}\n\n\n/**\n * Scale `coordinate` by `scale`. `coordinate` is modified in place and returned\n * by the function.\n *\n * Example:\n *\n *     import {scale as scaleCoordinate} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     var scale = 1.2;\n *     scaleCoordinate(coord, scale);\n *     // coord is now [9.42, 57.5799996]\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number} scale Scale factor.\n * @return {Coordinate} Coordinate.\n */\nexport function scale(coordinate, scale) {\n  coordinate[0] *= scale;\n  coordinate[1] *= scale;\n  return coordinate;\n}\n\n\n/**\n * @param {Coordinate} coord1 First coordinate.\n * @param {Coordinate} coord2 Second coordinate.\n * @return {number} Squared distance between coord1 and coord2.\n */\nexport function squaredDistance(coord1, coord2) {\n  var dx = coord1[0] - coord2[0];\n  var dy = coord1[1] - coord2[1];\n  return dx * dx + dy * dy;\n}\n\n\n/**\n * @param {Coordinate} coord1 First coordinate.\n * @param {Coordinate} coord2 Second coordinate.\n * @return {number} Distance between coord1 and coord2.\n */\nexport function distance(coord1, coord2) {\n  return Math.sqrt(squaredDistance(coord1, coord2));\n}\n\n\n/**\n * Calculate the squared distance from a coordinate to a line segment.\n *\n * @param {Coordinate} coordinate Coordinate of the point.\n * @param {Array<Coordinate>} segment Line segment (2\n * coordinates).\n * @return {number} Squared distance from the point to the line segment.\n */\nexport function squaredDistanceToSegment(coordinate, segment) {\n  return squaredDistance(coordinate,\n    closestOnSegment(coordinate, segment));\n}\n\n\n/**\n * Format a geographic coordinate with the hemisphere, degrees, minutes, and\n * seconds.\n *\n * Example without specifying fractional digits:\n *\n *     import {toStringHDMS} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     var out = toStringHDMS(coord);\n *     // out is now '47° 58′ 60″ N 7° 50′ 60″ E'\n *\n * Example explicitly specifying 1 fractional digit:\n *\n *     import {toStringHDMS} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     var out = toStringHDMS(coord, 1);\n *     // out is now '47° 58′ 60.0″ N 7° 50′ 60.0″ E'\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number=} opt_fractionDigits The number of digits to include\n *    after the decimal point. Default is `0`.\n * @return {string} Hemisphere, degrees, minutes and seconds.\n * @api\n */\nexport function toStringHDMS(coordinate, opt_fractionDigits) {\n  if (coordinate) {\n    return degreesToStringHDMS('NS', coordinate[1], opt_fractionDigits) + ' ' +\n        degreesToStringHDMS('EW', coordinate[0], opt_fractionDigits);\n  } else {\n    return '';\n  }\n}\n\n\n/**\n * Format a coordinate as a comma delimited string.\n *\n * Example without specifying fractional digits:\n *\n *     import {toStringXY} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     var out = toStringXY(coord);\n *     // out is now '8, 48'\n *\n * Example explicitly specifying 1 fractional digit:\n *\n *     import {toStringXY} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     var out = toStringXY(coord, 1);\n *     // out is now '7.8, 48.0'\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number=} opt_fractionDigits The number of digits to include\n *    after the decimal point. Default is `0`.\n * @return {string} XY.\n * @api\n */\nexport function toStringXY(coordinate, opt_fractionDigits) {\n  return format(coordinate, '{x}, {y}', opt_fractionDigits);\n}\n\n//# sourceMappingURL=coordinate.js.map","/**\n * @module ol/easing\n */\n\n\n/**\n * Start slow and speed up.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function easeIn(t) {\n  return Math.pow(t, 3);\n}\n\n\n/**\n * Start fast and slow down.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function easeOut(t) {\n  return 1 - easeIn(1 - t);\n}\n\n\n/**\n * Start slow, speed up, and then slow down again.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function inAndOut(t) {\n  return 3 * t * t - 2 * t * t * t;\n}\n\n\n/**\n * Maintain a constant speed over time.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function linear(t) {\n  return t;\n}\n\n\n/**\n * Start slow, speed up, and at the very end slow down again.  This has the\n * same general behavior as {@link module:ol/easing~inAndOut}, but the final\n * slowdown is delayed.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function upAndDown(t) {\n  if (t < 0.5) {\n    return inAndOut(2 * t);\n  } else {\n    return 1 - inAndOut(2 * (t - 0.5));\n  }\n}\n\n//# sourceMappingURL=easing.js.map","/**\n * @module ol/extent/Corner\n */\n\n/**\n * Extent corner.\n * @enum {string}\n */\nexport default {\n  BOTTOM_LEFT: 'bottom-left',\n  BOTTOM_RIGHT: 'bottom-right',\n  TOP_LEFT: 'top-left',\n  TOP_RIGHT: 'top-right'\n};\n\n//# sourceMappingURL=Corner.js.map","/**\n * @module ol/extent/Relationship\n */\n\n/**\n * Relationship to an extent.\n * @enum {number}\n */\nexport default {\n  UNKNOWN: 0,\n  INTERSECTING: 1,\n  ABOVE: 2,\n  RIGHT: 4,\n  BELOW: 8,\n  LEFT: 16\n};\n\n//# sourceMappingURL=Relationship.js.map","/**\n * @module ol/extent\n */\nimport {assert} from './asserts.js';\nimport Corner from './extent/Corner.js';\nimport Relationship from './extent/Relationship.js';\n\n\n/**\n * An array of numbers representing an extent: `[minx, miny, maxx, maxy]`.\n * @typedef {Array<number>} Extent\n * @api\n */\n\n/**\n * Build an extent that includes all given coordinates.\n *\n * @param {Array<import(\"./coordinate.js\").Coordinate>} coordinates Coordinates.\n * @return {Extent} Bounding extent.\n * @api\n */\nexport function boundingExtent(coordinates) {\n  var extent = createEmpty();\n  for (var i = 0, ii = coordinates.length; i < ii; ++i) {\n    extendCoordinate(extent, coordinates[i]);\n  }\n  return extent;\n}\n\n\n/**\n * @param {Array<number>} xs Xs.\n * @param {Array<number>} ys Ys.\n * @param {Extent=} opt_extent Destination extent.\n * @private\n * @return {Extent} Extent.\n */\nfunction _boundingExtentXYs(xs, ys, opt_extent) {\n  var minX = Math.min.apply(null, xs);\n  var minY = Math.min.apply(null, ys);\n  var maxX = Math.max.apply(null, xs);\n  var maxY = Math.max.apply(null, ys);\n  return createOrUpdate(minX, minY, maxX, maxY, opt_extent);\n}\n\n\n/**\n * Return extent increased by the provided value.\n * @param {Extent} extent Extent.\n * @param {number} value The amount by which the extent should be buffered.\n * @param {Extent=} opt_extent Extent.\n * @return {Extent} Extent.\n * @api\n */\nexport function buffer(extent, value, opt_extent) {\n  if (opt_extent) {\n    opt_extent[0] = extent[0] - value;\n    opt_extent[1] = extent[1] - value;\n    opt_extent[2] = extent[2] + value;\n    opt_extent[3] = extent[3] + value;\n    return opt_extent;\n  } else {\n    return [\n      extent[0] - value,\n      extent[1] - value,\n      extent[2] + value,\n      extent[3] + value\n    ];\n  }\n}\n\n\n/**\n * Creates a clone of an extent.\n *\n * @param {Extent} extent Extent to clone.\n * @param {Extent=} opt_extent Extent.\n * @return {Extent} The clone.\n */\nexport function clone(extent, opt_extent) {\n  if (opt_extent) {\n    opt_extent[0] = extent[0];\n    opt_extent[1] = extent[1];\n    opt_extent[2] = extent[2];\n    opt_extent[3] = extent[3];\n    return opt_extent;\n  } else {\n    return extent.slice();\n  }\n}\n\n\n/**\n * @param {Extent} extent Extent.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {number} Closest squared distance.\n */\nexport function closestSquaredDistanceXY(extent, x, y) {\n  var dx, dy;\n  if (x < extent[0]) {\n    dx = extent[0] - x;\n  } else if (extent[2] < x) {\n    dx = x - extent[2];\n  } else {\n    dx = 0;\n  }\n  if (y < extent[1]) {\n    dy = extent[1] - y;\n  } else if (extent[3] < y) {\n    dy = y - extent[3];\n  } else {\n    dy = 0;\n  }\n  return dx * dx + dy * dy;\n}\n\n\n/**\n * Check if the passed coordinate is contained or on the edge of the extent.\n *\n * @param {Extent} extent Extent.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @return {boolean} The coordinate is contained in the extent.\n * @api\n */\nexport function containsCoordinate(extent, coordinate) {\n  return containsXY(extent, coordinate[0], coordinate[1]);\n}\n\n\n/**\n * Check if one extent contains another.\n *\n * An extent is deemed contained if it lies completely within the other extent,\n * including if they share one or more edges.\n *\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {boolean} The second extent is contained by or on the edge of the\n *     first.\n * @api\n */\nexport function containsExtent(extent1, extent2) {\n  return extent1[0] <= extent2[0] && extent2[2] <= extent1[2] &&\n      extent1[1] <= extent2[1] && extent2[3] <= extent1[3];\n}\n\n\n/**\n * Check if the passed coordinate is contained or on the edge of the extent.\n *\n * @param {Extent} extent Extent.\n * @param {number} x X coordinate.\n * @param {number} y Y coordinate.\n * @return {boolean} The x, y values are contained in the extent.\n * @api\n */\nexport function containsXY(extent, x, y) {\n  return extent[0] <= x && x <= extent[2] && extent[1] <= y && y <= extent[3];\n}\n\n\n/**\n * Get the relationship between a coordinate and extent.\n * @param {Extent} extent The extent.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate The coordinate.\n * @return {Relationship} The relationship (bitwise compare with\n *     import(\"./extent/Relationship.js\").Relationship).\n */\nexport function coordinateRelationship(extent, coordinate) {\n  var minX = extent[0];\n  var minY = extent[1];\n  var maxX = extent[2];\n  var maxY = extent[3];\n  var x = coordinate[0];\n  var y = coordinate[1];\n  var relationship = Relationship.UNKNOWN;\n  if (x < minX) {\n    relationship = relationship | Relationship.LEFT;\n  } else if (x > maxX) {\n    relationship = relationship | Relationship.RIGHT;\n  }\n  if (y < minY) {\n    relationship = relationship | Relationship.BELOW;\n  } else if (y > maxY) {\n    relationship = relationship | Relationship.ABOVE;\n  }\n  if (relationship === Relationship.UNKNOWN) {\n    relationship = Relationship.INTERSECTING;\n  }\n  return relationship;\n}\n\n\n/**\n * Create an empty extent.\n * @return {Extent} Empty extent.\n * @api\n */\nexport function createEmpty() {\n  return [Infinity, Infinity, -Infinity, -Infinity];\n}\n\n\n/**\n * Create a new extent or update the provided extent.\n * @param {number} minX Minimum X.\n * @param {number} minY Minimum Y.\n * @param {number} maxX Maximum X.\n * @param {number} maxY Maximum Y.\n * @param {Extent=} opt_extent Destination extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdate(minX, minY, maxX, maxY, opt_extent) {\n  if (opt_extent) {\n    opt_extent[0] = minX;\n    opt_extent[1] = minY;\n    opt_extent[2] = maxX;\n    opt_extent[3] = maxY;\n    return opt_extent;\n  } else {\n    return [minX, minY, maxX, maxY];\n  }\n}\n\n\n/**\n * Create a new empty extent or make the provided one empty.\n * @param {Extent=} opt_extent Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateEmpty(opt_extent) {\n  return createOrUpdate(\n    Infinity, Infinity, -Infinity, -Infinity, opt_extent);\n}\n\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {Extent=} opt_extent Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromCoordinate(coordinate, opt_extent) {\n  var x = coordinate[0];\n  var y = coordinate[1];\n  return createOrUpdate(x, y, x, y, opt_extent);\n}\n\n\n/**\n * @param {Array<import(\"./coordinate.js\").Coordinate>} coordinates Coordinates.\n * @param {Extent=} opt_extent Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromCoordinates(coordinates, opt_extent) {\n  var extent = createOrUpdateEmpty(opt_extent);\n  return extendCoordinates(extent, coordinates);\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {Extent=} opt_extent Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromFlatCoordinates(flatCoordinates, offset, end, stride, opt_extent) {\n  var extent = createOrUpdateEmpty(opt_extent);\n  return extendFlatCoordinates(extent, flatCoordinates, offset, end, stride);\n}\n\n/**\n * @param {Array<Array<import(\"./coordinate.js\").Coordinate>>} rings Rings.\n * @param {Extent=} opt_extent Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromRings(rings, opt_extent) {\n  var extent = createOrUpdateEmpty(opt_extent);\n  return extendRings(extent, rings);\n}\n\n\n/**\n * Determine if two extents are equivalent.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {boolean} The two extents are equivalent.\n * @api\n */\nexport function equals(extent1, extent2) {\n  return extent1[0] == extent2[0] && extent1[2] == extent2[2] &&\n      extent1[1] == extent2[1] && extent1[3] == extent2[3];\n}\n\n\n/**\n * Modify an extent to include another extent.\n * @param {Extent} extent1 The extent to be modified.\n * @param {Extent} extent2 The extent that will be included in the first.\n * @return {Extent} A reference to the first (extended) extent.\n * @api\n */\nexport function extend(extent1, extent2) {\n  if (extent2[0] < extent1[0]) {\n    extent1[0] = extent2[0];\n  }\n  if (extent2[2] > extent1[2]) {\n    extent1[2] = extent2[2];\n  }\n  if (extent2[1] < extent1[1]) {\n    extent1[1] = extent2[1];\n  }\n  if (extent2[3] > extent1[3]) {\n    extent1[3] = extent2[3];\n  }\n  return extent1;\n}\n\n\n/**\n * @param {Extent} extent Extent.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n */\nexport function extendCoordinate(extent, coordinate) {\n  if (coordinate[0] < extent[0]) {\n    extent[0] = coordinate[0];\n  }\n  if (coordinate[0] > extent[2]) {\n    extent[2] = coordinate[0];\n  }\n  if (coordinate[1] < extent[1]) {\n    extent[1] = coordinate[1];\n  }\n  if (coordinate[1] > extent[3]) {\n    extent[3] = coordinate[1];\n  }\n}\n\n\n/**\n * @param {Extent} extent Extent.\n * @param {Array<import(\"./coordinate.js\").Coordinate>} coordinates Coordinates.\n * @return {Extent} Extent.\n */\nexport function extendCoordinates(extent, coordinates) {\n  for (var i = 0, ii = coordinates.length; i < ii; ++i) {\n    extendCoordinate(extent, coordinates[i]);\n  }\n  return extent;\n}\n\n\n/**\n * @param {Extent} extent Extent.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {Extent} Extent.\n */\nexport function extendFlatCoordinates(extent, flatCoordinates, offset, end, stride) {\n  for (; offset < end; offset += stride) {\n    extendXY(extent, flatCoordinates[offset], flatCoordinates[offset + 1]);\n  }\n  return extent;\n}\n\n\n/**\n * @param {Extent} extent Extent.\n * @param {Array<Array<import(\"./coordinate.js\").Coordinate>>} rings Rings.\n * @return {Extent} Extent.\n */\nexport function extendRings(extent, rings) {\n  for (var i = 0, ii = rings.length; i < ii; ++i) {\n    extendCoordinates(extent, rings[i]);\n  }\n  return extent;\n}\n\n\n/**\n * @param {Extent} extent Extent.\n * @param {number} x X.\n * @param {number} y Y.\n */\nexport function extendXY(extent, x, y) {\n  extent[0] = Math.min(extent[0], x);\n  extent[1] = Math.min(extent[1], y);\n  extent[2] = Math.max(extent[2], x);\n  extent[3] = Math.max(extent[3], y);\n}\n\n\n/**\n * This function calls `callback` for each corner of the extent. If the\n * callback returns a truthy value the function returns that value\n * immediately. Otherwise the function returns `false`.\n * @param {Extent} extent Extent.\n * @param {function(this:T, import(\"./coordinate.js\").Coordinate): S} callback Callback.\n * @param {T=} opt_this Value to use as `this` when executing `callback`.\n * @return {S|boolean} Value.\n * @template S, T\n */\nexport function forEachCorner(extent, callback, opt_this) {\n  var val;\n  val = callback.call(opt_this, getBottomLeft(extent));\n  if (val) {\n    return val;\n  }\n  val = callback.call(opt_this, getBottomRight(extent));\n  if (val) {\n    return val;\n  }\n  val = callback.call(opt_this, getTopRight(extent));\n  if (val) {\n    return val;\n  }\n  val = callback.call(opt_this, getTopLeft(extent));\n  if (val) {\n    return val;\n  }\n  return false;\n}\n\n\n/**\n * Get the size of an extent.\n * @param {Extent} extent Extent.\n * @return {number} Area.\n * @api\n */\nexport function getArea(extent) {\n  var area = 0;\n  if (!isEmpty(extent)) {\n    area = getWidth(extent) * getHeight(extent);\n  }\n  return area;\n}\n\n\n/**\n * Get the bottom left coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Bottom left coordinate.\n * @api\n */\nexport function getBottomLeft(extent) {\n  return [extent[0], extent[1]];\n}\n\n\n/**\n * Get the bottom right coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Bottom right coordinate.\n * @api\n */\nexport function getBottomRight(extent) {\n  return [extent[2], extent[1]];\n}\n\n\n/**\n * Get the center coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Center.\n * @api\n */\nexport function getCenter(extent) {\n  return [(extent[0] + extent[2]) / 2, (extent[1] + extent[3]) / 2];\n}\n\n\n/**\n * Get a corner coordinate of an extent.\n * @param {Extent} extent Extent.\n * @param {Corner} corner Corner.\n * @return {import(\"./coordinate.js\").Coordinate} Corner coordinate.\n */\nexport function getCorner(extent, corner) {\n  var coordinate;\n  if (corner === Corner.BOTTOM_LEFT) {\n    coordinate = getBottomLeft(extent);\n  } else if (corner === Corner.BOTTOM_RIGHT) {\n    coordinate = getBottomRight(extent);\n  } else if (corner === Corner.TOP_LEFT) {\n    coordinate = getTopLeft(extent);\n  } else if (corner === Corner.TOP_RIGHT) {\n    coordinate = getTopRight(extent);\n  } else {\n    assert(false, 13); // Invalid corner\n  }\n  return coordinate;\n}\n\n\n/**\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {number} Enlarged area.\n */\nexport function getEnlargedArea(extent1, extent2) {\n  var minX = Math.min(extent1[0], extent2[0]);\n  var minY = Math.min(extent1[1], extent2[1]);\n  var maxX = Math.max(extent1[2], extent2[2]);\n  var maxY = Math.max(extent1[3], extent2[3]);\n  return (maxX - minX) * (maxY - minY);\n}\n\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate} center Center.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {import(\"./size.js\").Size} size Size.\n * @param {Extent=} opt_extent Destination extent.\n * @return {Extent} Extent.\n */\nexport function getForViewAndSize(center, resolution, rotation, size, opt_extent) {\n  var dx = resolution * size[0] / 2;\n  var dy = resolution * size[1] / 2;\n  var cosRotation = Math.cos(rotation);\n  var sinRotation = Math.sin(rotation);\n  var xCos = dx * cosRotation;\n  var xSin = dx * sinRotation;\n  var yCos = dy * cosRotation;\n  var ySin = dy * sinRotation;\n  var x = center[0];\n  var y = center[1];\n  var x0 = x - xCos + ySin;\n  var x1 = x - xCos - ySin;\n  var x2 = x + xCos - ySin;\n  var x3 = x + xCos + ySin;\n  var y0 = y - xSin - yCos;\n  var y1 = y - xSin + yCos;\n  var y2 = y + xSin + yCos;\n  var y3 = y + xSin - yCos;\n  return createOrUpdate(\n    Math.min(x0, x1, x2, x3), Math.min(y0, y1, y2, y3),\n    Math.max(x0, x1, x2, x3), Math.max(y0, y1, y2, y3),\n    opt_extent);\n}\n\n\n/**\n * Get the height of an extent.\n * @param {Extent} extent Extent.\n * @return {number} Height.\n * @api\n */\nexport function getHeight(extent) {\n  return extent[3] - extent[1];\n}\n\n\n/**\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {number} Intersection area.\n */\nexport function getIntersectionArea(extent1, extent2) {\n  var intersection = getIntersection(extent1, extent2);\n  return getArea(intersection);\n}\n\n\n/**\n * Get the intersection of two extents.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @param {Extent=} opt_extent Optional extent to populate with intersection.\n * @return {Extent} Intersecting extent.\n * @api\n */\nexport function getIntersection(extent1, extent2, opt_extent) {\n  var intersection = opt_extent ? opt_extent : createEmpty();\n  if (intersects(extent1, extent2)) {\n    if (extent1[0] > extent2[0]) {\n      intersection[0] = extent1[0];\n    } else {\n      intersection[0] = extent2[0];\n    }\n    if (extent1[1] > extent2[1]) {\n      intersection[1] = extent1[1];\n    } else {\n      intersection[1] = extent2[1];\n    }\n    if (extent1[2] < extent2[2]) {\n      intersection[2] = extent1[2];\n    } else {\n      intersection[2] = extent2[2];\n    }\n    if (extent1[3] < extent2[3]) {\n      intersection[3] = extent1[3];\n    } else {\n      intersection[3] = extent2[3];\n    }\n  } else {\n    createOrUpdateEmpty(intersection);\n  }\n  return intersection;\n}\n\n\n/**\n * @param {Extent} extent Extent.\n * @return {number} Margin.\n */\nexport function getMargin(extent) {\n  return getWidth(extent) + getHeight(extent);\n}\n\n\n/**\n * Get the size (width, height) of an extent.\n * @param {Extent} extent The extent.\n * @return {import(\"./size.js\").Size} The extent size.\n * @api\n */\nexport function getSize(extent) {\n  return [extent[2] - extent[0], extent[3] - extent[1]];\n}\n\n\n/**\n * Get the top left coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Top left coordinate.\n * @api\n */\nexport function getTopLeft(extent) {\n  return [extent[0], extent[3]];\n}\n\n\n/**\n * Get the top right coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Top right coordinate.\n * @api\n */\nexport function getTopRight(extent) {\n  return [extent[2], extent[3]];\n}\n\n\n/**\n * Get the width of an extent.\n * @param {Extent} extent Extent.\n * @return {number} Width.\n * @api\n */\nexport function getWidth(extent) {\n  return extent[2] - extent[0];\n}\n\n\n/**\n * Determine if one extent intersects another.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent.\n * @return {boolean} The two extents intersect.\n * @api\n */\nexport function intersects(extent1, extent2) {\n  return extent1[0] <= extent2[2] &&\n      extent1[2] >= extent2[0] &&\n      extent1[1] <= extent2[3] &&\n      extent1[3] >= extent2[1];\n}\n\n\n/**\n * Determine if an extent is empty.\n * @param {Extent} extent Extent.\n * @return {boolean} Is empty.\n * @api\n */\nexport function isEmpty(extent) {\n  return extent[2] < extent[0] || extent[3] < extent[1];\n}\n\n\n/**\n * @param {Extent} extent Extent.\n * @param {Extent=} opt_extent Extent.\n * @return {Extent} Extent.\n */\nexport function returnOrUpdate(extent, opt_extent) {\n  if (opt_extent) {\n    opt_extent[0] = extent[0];\n    opt_extent[1] = extent[1];\n    opt_extent[2] = extent[2];\n    opt_extent[3] = extent[3];\n    return opt_extent;\n  } else {\n    return extent;\n  }\n}\n\n\n/**\n * @param {Extent} extent Extent.\n * @param {number} value Value.\n */\nexport function scaleFromCenter(extent, value) {\n  var deltaX = ((extent[2] - extent[0]) / 2) * (value - 1);\n  var deltaY = ((extent[3] - extent[1]) / 2) * (value - 1);\n  extent[0] -= deltaX;\n  extent[2] += deltaX;\n  extent[1] -= deltaY;\n  extent[3] += deltaY;\n}\n\n\n/**\n * Determine if the segment between two coordinates intersects (crosses,\n * touches, or is contained by) the provided extent.\n * @param {Extent} extent The extent.\n * @param {import(\"./coordinate.js\").Coordinate} start Segment start coordinate.\n * @param {import(\"./coordinate.js\").Coordinate} end Segment end coordinate.\n * @return {boolean} The segment intersects the extent.\n */\nexport function intersectsSegment(extent, start, end) {\n  var intersects = false;\n  var startRel = coordinateRelationship(extent, start);\n  var endRel = coordinateRelationship(extent, end);\n  if (startRel === Relationship.INTERSECTING ||\n      endRel === Relationship.INTERSECTING) {\n    intersects = true;\n  } else {\n    var minX = extent[0];\n    var minY = extent[1];\n    var maxX = extent[2];\n    var maxY = extent[3];\n    var startX = start[0];\n    var startY = start[1];\n    var endX = end[0];\n    var endY = end[1];\n    var slope = (endY - startY) / (endX - startX);\n    var x, y;\n    if (!!(endRel & Relationship.ABOVE) &&\n        !(startRel & Relationship.ABOVE)) {\n      // potentially intersects top\n      x = endX - ((endY - maxY) / slope);\n      intersects = x >= minX && x <= maxX;\n    }\n    if (!intersects && !!(endRel & Relationship.RIGHT) &&\n        !(startRel & Relationship.RIGHT)) {\n      // potentially intersects right\n      y = endY - ((endX - maxX) * slope);\n      intersects = y >= minY && y <= maxY;\n    }\n    if (!intersects && !!(endRel & Relationship.BELOW) &&\n        !(startRel & Relationship.BELOW)) {\n      // potentially intersects bottom\n      x = endX - ((endY - minY) / slope);\n      intersects = x >= minX && x <= maxX;\n    }\n    if (!intersects && !!(endRel & Relationship.LEFT) &&\n        !(startRel & Relationship.LEFT)) {\n      // potentially intersects left\n      y = endY - ((endX - minX) * slope);\n      intersects = y >= minY && y <= maxY;\n    }\n\n  }\n  return intersects;\n}\n\n\n/**\n * Apply a transform function to the extent.\n * @param {Extent} extent Extent.\n * @param {import(\"./proj.js\").TransformFunction} transformFn Transform function.\n * Called with `[minX, minY, maxX, maxY]` extent coordinates.\n * @param {Extent=} opt_extent Destination extent.\n * @return {Extent} Extent.\n * @api\n */\nexport function applyTransform(extent, transformFn, opt_extent) {\n  var coordinates = [\n    extent[0], extent[1],\n    extent[0], extent[3],\n    extent[2], extent[1],\n    extent[2], extent[3]\n  ];\n  transformFn(coordinates, coordinates, 2);\n  var xs = [coordinates[0], coordinates[2], coordinates[4], coordinates[6]];\n  var ys = [coordinates[1], coordinates[3], coordinates[5], coordinates[7]];\n  return _boundingExtentXYs(xs, ys, opt_extent);\n}\n\n//# sourceMappingURL=extent.js.map","/**\n * @module ol/geom/GeometryType\n */\n\n/**\n * The geometry type. One of `'Point'`, `'LineString'`, `'LinearRing'`,\n * `'Polygon'`, `'MultiPoint'`, `'MultiLineString'`, `'MultiPolygon'`,\n * `'GeometryCollection'`, `'Circle'`.\n * @enum {string}\n */\nexport default {\n  POINT: 'Point',\n  LINE_STRING: 'LineString',\n  LINEAR_RING: 'LinearRing',\n  POLYGON: 'Polygon',\n  MULTI_POINT: 'MultiPoint',\n  MULTI_LINE_STRING: 'MultiLineString',\n  MULTI_POLYGON: 'MultiPolygon',\n  GEOMETRY_COLLECTION: 'GeometryCollection',\n  CIRCLE: 'Circle'\n};\n\n//# sourceMappingURL=GeometryType.js.map","/**\n * @module ol/geom/GeometryLayout\n */\n\n/**\n * The coordinate layout for geometries, indicating whether a 3rd or 4th z ('Z')\n * or measure ('M') coordinate is available. Supported values are `'XY'`,\n * `'XYZ'`, `'XYM'`, `'XYZM'`.\n * @enum {string}\n */\nexport default {\n  XY: 'XY',\n  XYZ: 'XYZ',\n  XYM: 'XYM',\n  XYZM: 'XYZM'\n};\n\n//# sourceMappingURL=GeometryLayout.js.map","/**\n * @module ol/geom/flat/transform\n */\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../transform.js\").Transform} transform Transform.\n * @param {Array<number>=} opt_dest Destination.\n * @return {Array<number>} Transformed coordinates.\n */\nexport function transform2D(flatCoordinates, offset, end, stride, transform, opt_dest) {\n  var dest = opt_dest ? opt_dest : [];\n  var i = 0;\n  for (var j = offset; j < end; j += stride) {\n    var x = flatCoordinates[j];\n    var y = flatCoordinates[j + 1];\n    dest[i++] = transform[0] * x + transform[2] * y + transform[4];\n    dest[i++] = transform[1] * x + transform[3] * y + transform[5];\n  }\n  if (opt_dest && dest.length != i) {\n    dest.length = i;\n  }\n  return dest;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} angle Angle.\n * @param {Array<number>} anchor Rotation anchor point.\n * @param {Array<number>=} opt_dest Destination.\n * @return {Array<number>} Transformed coordinates.\n */\nexport function rotate(flatCoordinates, offset, end, stride, angle, anchor, opt_dest) {\n  var dest = opt_dest ? opt_dest : [];\n  var cos = Math.cos(angle);\n  var sin = Math.sin(angle);\n  var anchorX = anchor[0];\n  var anchorY = anchor[1];\n  var i = 0;\n  for (var j = offset; j < end; j += stride) {\n    var deltaX = flatCoordinates[j] - anchorX;\n    var deltaY = flatCoordinates[j + 1] - anchorY;\n    dest[i++] = anchorX + deltaX * cos - deltaY * sin;\n    dest[i++] = anchorY + deltaX * sin + deltaY * cos;\n    for (var k = j + 2; k < j + stride; ++k) {\n      dest[i++] = flatCoordinates[k];\n    }\n  }\n  if (opt_dest && dest.length != i) {\n    dest.length = i;\n  }\n  return dest;\n}\n\n\n/**\n * Scale the coordinates.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} sx Scale factor in the x-direction.\n * @param {number} sy Scale factor in the y-direction.\n * @param {Array<number>} anchor Scale anchor point.\n * @param {Array<number>=} opt_dest Destination.\n * @return {Array<number>} Transformed coordinates.\n */\nexport function scale(flatCoordinates, offset, end, stride, sx, sy, anchor, opt_dest) {\n  var dest = opt_dest ? opt_dest : [];\n  var anchorX = anchor[0];\n  var anchorY = anchor[1];\n  var i = 0;\n  for (var j = offset; j < end; j += stride) {\n    var deltaX = flatCoordinates[j] - anchorX;\n    var deltaY = flatCoordinates[j + 1] - anchorY;\n    dest[i++] = anchorX + sx * deltaX;\n    dest[i++] = anchorY + sy * deltaY;\n    for (var k = j + 2; k < j + stride; ++k) {\n      dest[i++] = flatCoordinates[k];\n    }\n  }\n  if (opt_dest && dest.length != i) {\n    dest.length = i;\n  }\n  return dest;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} deltaX Delta X.\n * @param {number} deltaY Delta Y.\n * @param {Array<number>=} opt_dest Destination.\n * @return {Array<number>} Transformed coordinates.\n */\nexport function translate(flatCoordinates, offset, end, stride, deltaX, deltaY, opt_dest) {\n  var dest = opt_dest ? opt_dest : [];\n  var i = 0;\n  for (var j = offset; j < end; j += stride) {\n    dest[i++] = flatCoordinates[j] + deltaX;\n    dest[i++] = flatCoordinates[j + 1] + deltaY;\n    for (var k = j + 2; k < j + stride; ++k) {\n      dest[i++] = flatCoordinates[k];\n    }\n  }\n  if (opt_dest && dest.length != i) {\n    dest.length = i;\n  }\n  return dest;\n}\n\n//# sourceMappingURL=transform.js.map","/**\n * @license\n * Latitude/longitude spherical geodesy formulae taken from\n * http://www.movable-type.co.uk/scripts/latlong.html\n * Licensed under CC-BY-3.0.\n */\n\n/**\n * @module ol/sphere\n */\nimport {toRadians, toDegrees} from './math.js';\nimport GeometryType from './geom/GeometryType.js';\n\n\n/**\n * Object literal with options for the {@link getLength} or {@link getArea}\n * functions.\n * @typedef {Object} SphereMetricOptions\n * @property {import(\"./proj.js\").ProjectionLike} [projection='EPSG:3857']\n * Projection of the  geometry.  By default, the geometry is assumed to be in\n * Web Mercator.\n * @property {number} [radius=6371008.8] Sphere radius.  By default, the radius of the\n * earth is used (Clarke 1866 Authalic Sphere).\n */\n\n\n/**\n * The mean Earth radius (1/3 * (2a + b)) for the WGS84 ellipsoid.\n * https://en.wikipedia.org/wiki/Earth_radius#Mean_radius\n * @type {number}\n */\nexport var DEFAULT_RADIUS = 6371008.8;\n\n\n/**\n * Get the great circle distance (in meters) between two geographic coordinates.\n * @param {Array} c1 Starting coordinate.\n * @param {Array} c2 Ending coordinate.\n * @param {number=} opt_radius The sphere radius to use.  Defaults to the Earth's\n *     mean radius using the WGS84 ellipsoid.\n * @return {number} The great circle distance between the points (in meters).\n * @api\n */\nexport function getDistance(c1, c2, opt_radius) {\n  var radius = opt_radius || DEFAULT_RADIUS;\n  var lat1 = toRadians(c1[1]);\n  var lat2 = toRadians(c2[1]);\n  var deltaLatBy2 = (lat2 - lat1) / 2;\n  var deltaLonBy2 = toRadians(c2[0] - c1[0]) / 2;\n  var a = Math.sin(deltaLatBy2) * Math.sin(deltaLatBy2) +\n      Math.sin(deltaLonBy2) * Math.sin(deltaLonBy2) *\n      Math.cos(lat1) * Math.cos(lat2);\n  return 2 * radius * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));\n}\n\n\n/**\n * Get the cumulative great circle length of linestring coordinates (geographic).\n * @param {Array} coordinates Linestring coordinates.\n * @param {number} radius The sphere radius to use.\n * @return {number} The length (in meters).\n */\nfunction getLengthInternal(coordinates, radius) {\n  var length = 0;\n  for (var i = 0, ii = coordinates.length; i < ii - 1; ++i) {\n    length += getDistance(coordinates[i], coordinates[i + 1], radius);\n  }\n  return length;\n}\n\n\n/**\n * Get the spherical length of a geometry.  This length is the sum of the\n * great circle distances between coordinates.  For polygons, the length is\n * the sum of all rings.  For points, the length is zero.  For multi-part\n * geometries, the length is the sum of the length of each part.\n * @param {import(\"./geom/Geometry.js\").default} geometry A geometry.\n * @param {SphereMetricOptions=} opt_options Options for the\n * length calculation.  By default, geometries are assumed to be in 'EPSG:3857'.\n * You can change this by providing a `projection` option.\n * @return {number} The spherical length (in meters).\n * @api\n */\nexport function getLength(geometry, opt_options) {\n  var options = opt_options || {};\n  var radius = options.radius || DEFAULT_RADIUS;\n  var projection = options.projection || 'EPSG:3857';\n  var type = geometry.getType();\n  if (type !== GeometryType.GEOMETRY_COLLECTION) {\n    geometry = geometry.clone().transform(projection, 'EPSG:4326');\n  }\n  var length = 0;\n  var coordinates, coords, i, ii, j, jj;\n  switch (type) {\n    case GeometryType.POINT:\n    case GeometryType.MULTI_POINT: {\n      break;\n    }\n    case GeometryType.LINE_STRING:\n    case GeometryType.LINEAR_RING: {\n      coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (geometry).getCoordinates();\n      length = getLengthInternal(coordinates, radius);\n      break;\n    }\n    case GeometryType.MULTI_LINE_STRING:\n    case GeometryType.POLYGON: {\n      coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (geometry).getCoordinates();\n      for (i = 0, ii = coordinates.length; i < ii; ++i) {\n        length += getLengthInternal(coordinates[i], radius);\n      }\n      break;\n    }\n    case GeometryType.MULTI_POLYGON: {\n      coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (geometry).getCoordinates();\n      for (i = 0, ii = coordinates.length; i < ii; ++i) {\n        coords = coordinates[i];\n        for (j = 0, jj = coords.length; j < jj; ++j) {\n          length += getLengthInternal(coords[j], radius);\n        }\n      }\n      break;\n    }\n    case GeometryType.GEOMETRY_COLLECTION: {\n      var geometries = /** @type {import(\"./geom/GeometryCollection.js\").default} */ (geometry).getGeometries();\n      for (i = 0, ii = geometries.length; i < ii; ++i) {\n        length += getLength(geometries[i], opt_options);\n      }\n      break;\n    }\n    default: {\n      throw new Error('Unsupported geometry type: ' + type);\n    }\n  }\n  return length;\n}\n\n\n/**\n * Returns the spherical area for a list of coordinates.\n *\n * [Reference](https://trs-new.jpl.nasa.gov/handle/2014/40409)\n * Robert. G. Chamberlain and William H. Duquette, \"Some Algorithms for\n * Polygons on a Sphere\", JPL Publication 07-03, Jet Propulsion\n * Laboratory, Pasadena, CA, June 2007\n *\n * @param {Array<import(\"./coordinate.js\").Coordinate>} coordinates List of coordinates of a linear\n * ring. If the ring is oriented clockwise, the area will be positive,\n * otherwise it will be negative.\n * @param {number} radius The sphere radius.\n * @return {number} Area (in square meters).\n */\nfunction getAreaInternal(coordinates, radius) {\n  var area = 0;\n  var len = coordinates.length;\n  var x1 = coordinates[len - 1][0];\n  var y1 = coordinates[len - 1][1];\n  for (var i = 0; i < len; i++) {\n    var x2 = coordinates[i][0];\n    var y2 = coordinates[i][1];\n    area += toRadians(x2 - x1) *\n        (2 + Math.sin(toRadians(y1)) +\n        Math.sin(toRadians(y2)));\n    x1 = x2;\n    y1 = y2;\n  }\n  return area * radius * radius / 2.0;\n}\n\n\n/**\n * Get the spherical area of a geometry.  This is the area (in meters) assuming\n * that polygon edges are segments of great circles on a sphere.\n * @param {import(\"./geom/Geometry.js\").default} geometry A geometry.\n * @param {SphereMetricOptions=} opt_options Options for the area\n *     calculation.  By default, geometries are assumed to be in 'EPSG:3857'.\n *     You can change this by providing a `projection` option.\n * @return {number} The spherical area (in square meters).\n * @api\n */\nexport function getArea(geometry, opt_options) {\n  var options = opt_options || {};\n  var radius = options.radius || DEFAULT_RADIUS;\n  var projection = options.projection || 'EPSG:3857';\n  var type = geometry.getType();\n  if (type !== GeometryType.GEOMETRY_COLLECTION) {\n    geometry = geometry.clone().transform(projection, 'EPSG:4326');\n  }\n  var area = 0;\n  var coordinates, coords, i, ii, j, jj;\n  switch (type) {\n    case GeometryType.POINT:\n    case GeometryType.MULTI_POINT:\n    case GeometryType.LINE_STRING:\n    case GeometryType.MULTI_LINE_STRING:\n    case GeometryType.LINEAR_RING: {\n      break;\n    }\n    case GeometryType.POLYGON: {\n      coordinates = /** @type {import(\"./geom/Polygon.js\").default} */ (geometry).getCoordinates();\n      area = Math.abs(getAreaInternal(coordinates[0], radius));\n      for (i = 1, ii = coordinates.length; i < ii; ++i) {\n        area -= Math.abs(getAreaInternal(coordinates[i], radius));\n      }\n      break;\n    }\n    case GeometryType.MULTI_POLYGON: {\n      coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (geometry).getCoordinates();\n      for (i = 0, ii = coordinates.length; i < ii; ++i) {\n        coords = coordinates[i];\n        area += Math.abs(getAreaInternal(coords[0], radius));\n        for (j = 1, jj = coords.length; j < jj; ++j) {\n          area -= Math.abs(getAreaInternal(coords[j], radius));\n        }\n      }\n      break;\n    }\n    case GeometryType.GEOMETRY_COLLECTION: {\n      var geometries = /** @type {import(\"./geom/GeometryCollection.js\").default} */ (geometry).getGeometries();\n      for (i = 0, ii = geometries.length; i < ii; ++i) {\n        area += getArea(geometries[i], opt_options);\n      }\n      break;\n    }\n    default: {\n      throw new Error('Unsupported geometry type: ' + type);\n    }\n  }\n  return area;\n}\n\n\n/**\n * Returns the coordinate at the given distance and bearing from `c1`.\n *\n * @param {import(\"./coordinate.js\").Coordinate} c1 The origin point (`[lon, lat]` in degrees).\n * @param {number} distance The great-circle distance between the origin\n *     point and the target point.\n * @param {number} bearing The bearing (in radians).\n * @param {number=} opt_radius The sphere radius to use.  Defaults to the Earth's\n *     mean radius using the WGS84 ellipsoid.\n * @return {import(\"./coordinate.js\").Coordinate} The target point.\n */\nexport function offset(c1, distance, bearing, opt_radius) {\n  var radius = opt_radius || DEFAULT_RADIUS;\n  var lat1 = toRadians(c1[1]);\n  var lon1 = toRadians(c1[0]);\n  var dByR = distance / radius;\n  var lat = Math.asin(\n    Math.sin(lat1) * Math.cos(dByR) +\n      Math.cos(lat1) * Math.sin(dByR) * Math.cos(bearing));\n  var lon = lon1 + Math.atan2(\n    Math.sin(bearing) * Math.sin(dByR) * Math.cos(lat1),\n    Math.cos(dByR) - Math.sin(lat1) * Math.sin(lat));\n  return [toDegrees(lon), toDegrees(lat)];\n}\n\n//# sourceMappingURL=sphere.js.map","/**\n * @module ol/proj/Units\n */\n\n/**\n * Projection units: `'degrees'`, `'ft'`, `'m'`, `'pixels'`, `'tile-pixels'` or\n * `'us-ft'`.\n * @enum {string}\n */\nvar Units = {\n  DEGREES: 'degrees',\n  FEET: 'ft',\n  METERS: 'm',\n  PIXELS: 'pixels',\n  TILE_PIXELS: 'tile-pixels',\n  USFEET: 'us-ft'\n};\n\n\n/**\n * Meters per unit lookup table.\n * @const\n * @type {Object<Units, number>}\n * @api\n */\nexport var METERS_PER_UNIT = {};\n// use the radius of the Normal sphere\nMETERS_PER_UNIT[Units.DEGREES] = 2 * Math.PI * 6370997 / 360;\nMETERS_PER_UNIT[Units.FEET] = 0.3048;\nMETERS_PER_UNIT[Units.METERS] = 1;\nMETERS_PER_UNIT[Units.USFEET] = 1200 / 3937;\n\nexport default Units;\n\n//# sourceMappingURL=Units.js.map","/**\n * @module ol/proj/Projection\n */\nimport {METERS_PER_UNIT} from './Units.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {string} code The SRS identifier code, e.g. `EPSG:4326`.\n * @property {import(\"./Units.js\").default|string} [units] Units. Required unless a\n * proj4 projection is defined for `code`.\n * @property {import(\"../extent.js\").Extent} [extent] The validity extent for the SRS.\n * @property {string} [axisOrientation='enu'] The axis orientation as specified in Proj4.\n * @property {boolean} [global=false] Whether the projection is valid for the whole globe.\n * @property {number} [metersPerUnit] The meters per unit for the SRS.\n * If not provided, the `units` are used to get the meters per unit from the {@link module:ol/proj/Units~METERS_PER_UNIT}\n * lookup table.\n * @property {import(\"../extent.js\").Extent} [worldExtent] The world extent for the SRS.\n * @property {function(number, import(\"../coordinate.js\").Coordinate):number} [getPointResolution]\n * Function to determine resolution at a point. The function is called with a\n * `{number}` view resolution and an `{import(\"../coordinate.js\").Coordinate}` as arguments, and returns\n * the `{number}` resolution at the passed coordinate. If this is `undefined`,\n * the default {@link module:ol/proj#getPointResolution} function will be used.\n */\n\n\n/**\n * @classdesc\n * Projection definition class. One of these is created for each projection\n * supported in the application and stored in the {@link module:ol/proj} namespace.\n * You can use these in applications, but this is not required, as API params\n * and options use {@link module:ol/proj~ProjectionLike} which means the simple string\n * code will suffice.\n *\n * You can use {@link module:ol/proj~get} to retrieve the object for a particular\n * projection.\n *\n * The library includes definitions for `EPSG:4326` and `EPSG:3857`, together\n * with the following aliases:\n * * `EPSG:4326`: CRS:84, urn:ogc:def:crs:EPSG:6.6:4326,\n *     urn:ogc:def:crs:OGC:1.3:CRS84, urn:ogc:def:crs:OGC:2:84,\n *     http://www.opengis.net/gml/srs/epsg.xml#4326,\n *     urn:x-ogc:def:crs:EPSG:4326\n * * `EPSG:3857`: EPSG:102100, EPSG:102113, EPSG:900913,\n *     urn:ogc:def:crs:EPSG:6.18:3:3857,\n *     http://www.opengis.net/gml/srs/epsg.xml#3857\n *\n * If you use [proj4js](https://github.com/proj4js/proj4js), aliases can\n * be added using `proj4.defs()`. After all required projection definitions are\n * added, call the {@link module:ol/proj/proj4~register} function.\n *\n * @api\n */\nvar Projection = function Projection(options) {\n  /**\n   * @private\n   * @type {string}\n   */\n  this.code_ = options.code;\n\n  /**\n   * Units of projected coordinates. When set to `TILE_PIXELS`, a\n   * `this.extent_` and `this.worldExtent_` must be configured properly for each\n   * tile.\n   * @private\n   * @type {import(\"./Units.js\").default}\n   */\n  this.units_ = /** @type {import(\"./Units.js\").default} */ (options.units);\n\n  /**\n   * Validity extent of the projection in projected coordinates. For projections\n   * with `TILE_PIXELS` units, this is the extent of the tile in\n   * tile pixel space.\n   * @private\n   * @type {import(\"../extent.js\").Extent}\n   */\n  this.extent_ = options.extent !== undefined ? options.extent : null;\n\n  /**\n   * Extent of the world in EPSG:4326. For projections with\n   * `TILE_PIXELS` units, this is the extent of the tile in\n   * projected coordinate space.\n   * @private\n   * @type {import(\"../extent.js\").Extent}\n   */\n  this.worldExtent_ = options.worldExtent !== undefined ?\n    options.worldExtent : null;\n\n  /**\n   * @private\n   * @type {string}\n   */\n  this.axisOrientation_ = options.axisOrientation !== undefined ?\n    options.axisOrientation : 'enu';\n\n  /**\n   * @private\n   * @type {boolean}\n   */\n  this.global_ = options.global !== undefined ? options.global : false;\n\n  /**\n   * @private\n   * @type {boolean}\n   */\n  this.canWrapX_ = !!(this.global_ && this.extent_);\n\n  /**\n   * @private\n   * @type {function(number, import(\"../coordinate.js\").Coordinate):number|undefined}\n   */\n  this.getPointResolutionFunc_ = options.getPointResolution;\n\n  /**\n   * @private\n   * @type {import(\"../tilegrid/TileGrid.js\").default}\n   */\n  this.defaultTileGrid_ = null;\n\n  /**\n   * @private\n   * @type {number|undefined}\n   */\n  this.metersPerUnit_ = options.metersPerUnit;\n};\n\n/**\n * @return {boolean} The projection is suitable for wrapping the x-axis\n */\nProjection.prototype.canWrapX = function canWrapX () {\n  return this.canWrapX_;\n};\n\n/**\n * Get the code for this projection, e.g. 'EPSG:4326'.\n * @return {string} Code.\n * @api\n */\nProjection.prototype.getCode = function getCode () {\n  return this.code_;\n};\n\n/**\n * Get the validity extent for this projection.\n * @return {import(\"../extent.js\").Extent} Extent.\n * @api\n */\nProjection.prototype.getExtent = function getExtent () {\n  return this.extent_;\n};\n\n/**\n * Get the units of this projection.\n * @return {import(\"./Units.js\").default} Units.\n * @api\n */\nProjection.prototype.getUnits = function getUnits () {\n  return this.units_;\n};\n\n/**\n * Get the amount of meters per unit of this projection.If the projection is\n * not configured with `metersPerUnit` or a units identifier, the return is\n * `undefined`.\n * @return {number|undefined} Meters.\n * @api\n */\nProjection.prototype.getMetersPerUnit = function getMetersPerUnit () {\n  return this.metersPerUnit_ || METERS_PER_UNIT[this.units_];\n};\n\n/**\n * Get the world extent for this projection.\n * @return {import(\"../extent.js\").Extent} Extent.\n * @api\n */\nProjection.prototype.getWorldExtent = function getWorldExtent () {\n  return this.worldExtent_;\n};\n\n/**\n * Get the axis orientation of this projection.\n * Example values are:\n * enu - the default easting, northing, elevation.\n * neu - northing, easting, up - useful for \"lat/long\" geographic coordinates,\n *   or south orientated transverse mercator.\n * wnu - westing, northing, up - some planetary coordinate systems have\n *   \"west positive\" coordinate systems\n * @return {string} Axis orientation.\n * @api\n */\nProjection.prototype.getAxisOrientation = function getAxisOrientation () {\n  return this.axisOrientation_;\n};\n\n/**\n * Is this projection a global projection which spans the whole world?\n * @return {boolean} Whether the projection is global.\n * @api\n */\nProjection.prototype.isGlobal = function isGlobal () {\n  return this.global_;\n};\n\n/**\n * Set if the projection is a global projection which spans the whole world\n * @param {boolean} global Whether the projection is global.\n * @api\n */\nProjection.prototype.setGlobal = function setGlobal (global) {\n  this.global_ = global;\n  this.canWrapX_ = !!(global && this.extent_);\n};\n\n/**\n * @return {import(\"../tilegrid/TileGrid.js\").default} The default tile grid.\n */\nProjection.prototype.getDefaultTileGrid = function getDefaultTileGrid () {\n  return this.defaultTileGrid_;\n};\n\n/**\n * @param {import(\"../tilegrid/TileGrid.js\").default} tileGrid The default tile grid.\n */\nProjection.prototype.setDefaultTileGrid = function setDefaultTileGrid (tileGrid) {\n  this.defaultTileGrid_ = tileGrid;\n};\n\n/**\n * Set the validity extent for this projection.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @api\n */\nProjection.prototype.setExtent = function setExtent (extent) {\n  this.extent_ = extent;\n  this.canWrapX_ = !!(this.global_ && extent);\n};\n\n/**\n * Set the world extent for this projection.\n * @param {import(\"../extent.js\").Extent} worldExtent World extent\n *   [minlon, minlat, maxlon, maxlat].\n * @api\n */\nProjection.prototype.setWorldExtent = function setWorldExtent (worldExtent) {\n  this.worldExtent_ = worldExtent;\n};\n\n/**\n * Set the getPointResolution function (see {@link module:ol/proj~getPointResolution}\n * for this projection.\n * @param {function(number, import(\"../coordinate.js\").Coordinate):number} func Function\n * @api\n */\nProjection.prototype.setGetPointResolution = function setGetPointResolution (func) {\n  this.getPointResolutionFunc_ = func;\n};\n\n/**\n * Get the custom point resolution function for this projection (if set).\n * @return {function(number, import(\"../coordinate.js\").Coordinate):number|undefined} The custom point\n * resolution function (if set).\n */\nProjection.prototype.getPointResolutionFunc = function getPointResolutionFunc () {\n  return this.getPointResolutionFunc_;\n};\n\nexport default Projection;\n\n//# sourceMappingURL=Projection.js.map","/**\n * @module ol/proj/epsg3857\n */\nimport {cosh} from '../math.js';\nimport Projection from './Projection.js';\nimport Units from './Units.js';\n\n\n/**\n * Radius of WGS84 sphere\n *\n * @const\n * @type {number}\n */\nexport var RADIUS = 6378137;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var HALF_SIZE = Math.PI * RADIUS;\n\n\n/**\n * @const\n * @type {import(\"../extent.js\").Extent}\n */\nexport var EXTENT = [\n  -HALF_SIZE, -HALF_SIZE,\n  HALF_SIZE, HALF_SIZE\n];\n\n\n/**\n * @const\n * @type {import(\"../extent.js\").Extent}\n */\nexport var WORLD_EXTENT = [-180, -85, 180, 85];\n\n\n/**\n * @classdesc\n * Projection object for web/spherical Mercator (EPSG:3857).\n */\nvar EPSG3857Projection = /*@__PURE__*/(function (Projection) {\n  function EPSG3857Projection(code) {\n    Projection.call(this, {\n      code: code,\n      units: Units.METERS,\n      extent: EXTENT,\n      global: true,\n      worldExtent: WORLD_EXTENT,\n      getPointResolution: function(resolution, point) {\n        return resolution / cosh(point[1] / RADIUS);\n      }\n    });\n\n  }\n\n  if ( Projection ) EPSG3857Projection.__proto__ = Projection;\n  EPSG3857Projection.prototype = Object.create( Projection && Projection.prototype );\n  EPSG3857Projection.prototype.constructor = EPSG3857Projection;\n\n  return EPSG3857Projection;\n}(Projection));\n\n\n/**\n * Projections equal to EPSG:3857.\n *\n * @const\n * @type {Array<import(\"./Projection.js\").default>}\n */\nexport var PROJECTIONS = [\n  new EPSG3857Projection('EPSG:3857'),\n  new EPSG3857Projection('EPSG:102100'),\n  new EPSG3857Projection('EPSG:102113'),\n  new EPSG3857Projection('EPSG:900913'),\n  new EPSG3857Projection('urn:ogc:def:crs:EPSG:6.18:3:3857'),\n  new EPSG3857Projection('urn:ogc:def:crs:EPSG::3857'),\n  new EPSG3857Projection('http://www.opengis.net/gml/srs/epsg.xml#3857')\n];\n\n\n/**\n * Transformation from EPSG:4326 to EPSG:3857.\n *\n * @param {Array<number>} input Input array of coordinate values.\n * @param {Array<number>=} opt_output Output array of coordinate values.\n * @param {number=} opt_dimension Dimension (default is `2`).\n * @return {Array<number>} Output array of coordinate values.\n */\nexport function fromEPSG4326(input, opt_output, opt_dimension) {\n  var length = input.length;\n  var dimension = opt_dimension > 1 ? opt_dimension : 2;\n  var output = opt_output;\n  if (output === undefined) {\n    if (dimension > 2) {\n      // preserve values beyond second dimension\n      output = input.slice();\n    } else {\n      output = new Array(length);\n    }\n  }\n  var halfSize = HALF_SIZE;\n  for (var i = 0; i < length; i += dimension) {\n    output[i] = halfSize * input[i] / 180;\n    var y = RADIUS *\n        Math.log(Math.tan(Math.PI * (input[i + 1] + 90) / 360));\n    if (y > halfSize) {\n      y = halfSize;\n    } else if (y < -halfSize) {\n      y = -halfSize;\n    }\n    output[i + 1] = y;\n  }\n  return output;\n}\n\n\n/**\n * Transformation from EPSG:3857 to EPSG:4326.\n *\n * @param {Array<number>} input Input array of coordinate values.\n * @param {Array<number>=} opt_output Output array of coordinate values.\n * @param {number=} opt_dimension Dimension (default is `2`).\n * @return {Array<number>} Output array of coordinate values.\n */\nexport function toEPSG4326(input, opt_output, opt_dimension) {\n  var length = input.length;\n  var dimension = opt_dimension > 1 ? opt_dimension : 2;\n  var output = opt_output;\n  if (output === undefined) {\n    if (dimension > 2) {\n      // preserve values beyond second dimension\n      output = input.slice();\n    } else {\n      output = new Array(length);\n    }\n  }\n  for (var i = 0; i < length; i += dimension) {\n    output[i] = 180 * input[i] / HALF_SIZE;\n    output[i + 1] = 360 * Math.atan(\n      Math.exp(input[i + 1] / RADIUS)) / Math.PI - 90;\n  }\n  return output;\n}\n\n//# sourceMappingURL=epsg3857.js.map","/**\n * @module ol/proj/epsg4326\n */\nimport Projection from './Projection.js';\nimport Units from './Units.js';\n\n\n/**\n * Semi-major radius of the WGS84 ellipsoid.\n *\n * @const\n * @type {number}\n */\nexport var RADIUS = 6378137;\n\n\n/**\n * Extent of the EPSG:4326 projection which is the whole world.\n *\n * @const\n * @type {import(\"../extent.js\").Extent}\n */\nexport var EXTENT = [-180, -90, 180, 90];\n\n\n/**\n * @const\n * @type {number}\n */\nexport var METERS_PER_UNIT = Math.PI * RADIUS / 180;\n\n\n/**\n * @classdesc\n * Projection object for WGS84 geographic coordinates (EPSG:4326).\n *\n * Note that OpenLayers does not strictly comply with the EPSG definition.\n * The EPSG registry defines 4326 as a CRS for Latitude,Longitude (y,x).\n * OpenLayers treats EPSG:4326 as a pseudo-projection, with x,y coordinates.\n */\nvar EPSG4326Projection = /*@__PURE__*/(function (Projection) {\n  function EPSG4326Projection(code, opt_axisOrientation) {\n    Projection.call(this, {\n      code: code,\n      units: Units.DEGREES,\n      extent: EXTENT,\n      axisOrientation: opt_axisOrientation,\n      global: true,\n      metersPerUnit: METERS_PER_UNIT,\n      worldExtent: EXTENT\n    });\n\n  }\n\n  if ( Projection ) EPSG4326Projection.__proto__ = Projection;\n  EPSG4326Projection.prototype = Object.create( Projection && Projection.prototype );\n  EPSG4326Projection.prototype.constructor = EPSG4326Projection;\n\n  return EPSG4326Projection;\n}(Projection));\n\n\n/**\n * Projections equal to EPSG:4326.\n *\n * @const\n * @type {Array<import(\"./Projection.js\").default>}\n */\nexport var PROJECTIONS = [\n  new EPSG4326Projection('CRS:84'),\n  new EPSG4326Projection('EPSG:4326', 'neu'),\n  new EPSG4326Projection('urn:ogc:def:crs:EPSG::4326', 'neu'),\n  new EPSG4326Projection('urn:ogc:def:crs:EPSG:6.6:4326', 'neu'),\n  new EPSG4326Projection('urn:ogc:def:crs:OGC:1.3:CRS84'),\n  new EPSG4326Projection('urn:ogc:def:crs:OGC:2:84'),\n  new EPSG4326Projection('http://www.opengis.net/gml/srs/epsg.xml#4326', 'neu'),\n  new EPSG4326Projection('urn:x-ogc:def:crs:EPSG:4326', 'neu')\n];\n\n//# sourceMappingURL=epsg4326.js.map","/**\n * @module ol/proj/projections\n */\n\n\n/**\n * @type {Object<string, import(\"./Projection.js\").default>}\n */\nvar cache = {};\n\n\n/**\n * Clear the projections cache.\n */\nexport function clear() {\n  cache = {};\n}\n\n\n/**\n * Get a cached projection by code.\n * @param {string} code The code for the projection.\n * @return {import(\"./Projection.js\").default} The projection (if cached).\n */\nexport function get(code) {\n  return cache[code] || null;\n}\n\n\n/**\n * Add a projection to the cache.\n * @param {string} code The projection code.\n * @param {import(\"./Projection.js\").default} projection The projection to cache.\n */\nexport function add(code, projection) {\n  cache[code] = projection;\n}\n\n//# sourceMappingURL=projections.js.map","/**\n * @module ol/proj/transforms\n */\nimport {isEmpty} from '../obj.js';\n\n\n/**\n * @private\n * @type {!Object<string, Object<string, import(\"../proj.js\").TransformFunction>>}\n */\nvar transforms = {};\n\n\n/**\n * Clear the transform cache.\n */\nexport function clear() {\n  transforms = {};\n}\n\n\n/**\n * Registers a conversion function to convert coordinates from the source\n * projection to the destination projection.\n *\n * @param {import(\"./Projection.js\").default} source Source.\n * @param {import(\"./Projection.js\").default} destination Destination.\n * @param {import(\"../proj.js\").TransformFunction} transformFn Transform.\n */\nexport function add(source, destination, transformFn) {\n  var sourceCode = source.getCode();\n  var destinationCode = destination.getCode();\n  if (!(sourceCode in transforms)) {\n    transforms[sourceCode] = {};\n  }\n  transforms[sourceCode][destinationCode] = transformFn;\n}\n\n\n/**\n * Unregisters the conversion function to convert coordinates from the source\n * projection to the destination projection.  This method is used to clean up\n * cached transforms during testing.\n *\n * @param {import(\"./Projection.js\").default} source Source projection.\n * @param {import(\"./Projection.js\").default} destination Destination projection.\n * @return {import(\"../proj.js\").TransformFunction} transformFn The unregistered transform.\n */\nexport function remove(source, destination) {\n  var sourceCode = source.getCode();\n  var destinationCode = destination.getCode();\n  var transform = transforms[sourceCode][destinationCode];\n  delete transforms[sourceCode][destinationCode];\n  if (isEmpty(transforms[sourceCode])) {\n    delete transforms[sourceCode];\n  }\n  return transform;\n}\n\n\n/**\n * Get a transform given a source code and a destination code.\n * @param {string} sourceCode The code for the source projection.\n * @param {string} destinationCode The code for the destination projection.\n * @return {import(\"../proj.js\").TransformFunction|undefined} The transform function (if found).\n */\nexport function get(sourceCode, destinationCode) {\n  var transform;\n  if (sourceCode in transforms && destinationCode in transforms[sourceCode]) {\n    transform = transforms[sourceCode][destinationCode];\n  }\n  return transform;\n}\n\n//# sourceMappingURL=transforms.js.map","/**\n * @module ol/proj\n */\n\n/**\n * The ol/proj module stores:\n * * a list of {@link module:ol/proj/Projection}\n * objects, one for each projection supported by the application\n * * a list of transform functions needed to convert coordinates in one projection\n * into another.\n *\n * The static functions are the methods used to maintain these.\n * Each transform function can handle not only simple coordinate pairs, but also\n * large arrays of coordinates such as vector geometries.\n *\n * When loaded, the library adds projection objects for EPSG:4326 (WGS84\n * geographic coordinates) and EPSG:3857 (Web or Spherical Mercator, as used\n * for example by Bing Maps or OpenStreetMap), together with the relevant\n * transform functions.\n *\n * Additional transforms may be added by using the http://proj4js.org/\n * library (version 2.2 or later). You can use the full build supplied by\n * Proj4js, or create a custom build to support those projections you need; see\n * the Proj4js website for how to do this. You also need the Proj4js definitions\n * for the required projections. These definitions can be obtained from\n * https://epsg.io/, and are a JS function, so can be loaded in a script\n * tag (as in the examples) or pasted into your application.\n *\n * After all required projection definitions are added to proj4's registry (by\n * using `proj4.defs()`), simply call `register(proj4)` from the `ol/proj/proj4`\n * package. Existing transforms are not changed by this function. See\n * examples/wms-image-custom-proj for an example of this.\n *\n * Additional projection definitions can be registered with `proj4.defs()` any\n * time. Just make sure to call `register(proj4)` again; for example, with user-supplied data where you don't\n * know in advance what projections are needed, you can initially load minimal\n * support and then load whichever are requested.\n *\n * Note that Proj4js does not support projection extents. If you want to add\n * one for creating default tile grids, you can add it after the Projection\n * object has been created with `setExtent`, for example,\n * `get('EPSG:1234').setExtent(extent)`.\n *\n * In addition to Proj4js support, any transform functions can be added with\n * {@link module:ol/proj~addCoordinateTransforms}. To use this, you must first create\n * a {@link module:ol/proj/Projection} object for the new projection and add it with\n * {@link module:ol/proj~addProjection}. You can then add the forward and inverse\n * functions with {@link module:ol/proj~addCoordinateTransforms}. See\n * examples/wms-custom-proj for an example of this.\n *\n * Note that if no transforms are needed and you only need to define the\n * projection, just add a {@link module:ol/proj/Projection} with\n * {@link module:ol/proj~addProjection}. See examples/wms-no-proj for an example of\n * this.\n */\nimport {getDistance} from './sphere.js';\nimport {applyTransform} from './extent.js';\nimport {modulo} from './math.js';\nimport {toEPSG4326, fromEPSG4326, PROJECTIONS as EPSG3857_PROJECTIONS} from './proj/epsg3857.js';\nimport {PROJECTIONS as EPSG4326_PROJECTIONS} from './proj/epsg4326.js';\nimport Projection from './proj/Projection.js';\nimport Units, {METERS_PER_UNIT} from './proj/Units.js';\nimport * as projections from './proj/projections.js';\nimport {add as addTransformFunc, clear as clearTransformFuncs, get as getTransformFunc} from './proj/transforms.js';\n\n\n/**\n * A projection as {@link module:ol/proj/Projection}, SRS identifier\n * string or undefined.\n * @typedef {Projection|string|undefined} ProjectionLike\n * @api\n */\n\n\n/**\n * A transform function accepts an array of input coordinate values, an optional\n * output array, and an optional dimension (default should be 2).  The function\n * transforms the input coordinate values, populates the output array, and\n * returns the output array.\n *\n * @typedef {function(Array<number>, Array<number>=, number=): Array<number>} TransformFunction\n * @api\n */\n\n\nexport {METERS_PER_UNIT};\n\nexport {Projection};\n\n/**\n * @param {Array<number>} input Input coordinate array.\n * @param {Array<number>=} opt_output Output array of coordinate values.\n * @param {number=} opt_dimension Dimension.\n * @return {Array<number>} Output coordinate array (new array, same coordinate\n *     values).\n */\nexport function cloneTransform(input, opt_output, opt_dimension) {\n  var output;\n  if (opt_output !== undefined) {\n    for (var i = 0, ii = input.length; i < ii; ++i) {\n      opt_output[i] = input[i];\n    }\n    output = opt_output;\n  } else {\n    output = input.slice();\n  }\n  return output;\n}\n\n\n/**\n * @param {Array<number>} input Input coordinate array.\n * @param {Array<number>=} opt_output Output array of coordinate values.\n * @param {number=} opt_dimension Dimension.\n * @return {Array<number>} Input coordinate array (same array as input).\n */\nexport function identityTransform(input, opt_output, opt_dimension) {\n  if (opt_output !== undefined && input !== opt_output) {\n    for (var i = 0, ii = input.length; i < ii; ++i) {\n      opt_output[i] = input[i];\n    }\n    input = opt_output;\n  }\n  return input;\n}\n\n\n/**\n * Add a Projection object to the list of supported projections that can be\n * looked up by their code.\n *\n * @param {Projection} projection Projection instance.\n * @api\n */\nexport function addProjection(projection) {\n  projections.add(projection.getCode(), projection);\n  addTransformFunc(projection, projection, cloneTransform);\n}\n\n\n/**\n * @param {Array<Projection>} projections Projections.\n */\nexport function addProjections(projections) {\n  projections.forEach(addProjection);\n}\n\n\n/**\n * Fetches a Projection object for the code specified.\n *\n * @param {ProjectionLike} projectionLike Either a code string which is\n *     a combination of authority and identifier such as \"EPSG:4326\", or an\n *     existing projection object, or undefined.\n * @return {Projection} Projection object, or null if not in list.\n * @api\n */\nexport function get(projectionLike) {\n  return typeof projectionLike === 'string' ?\n    projections.get(/** @type {string} */ (projectionLike)) :\n    (/** @type {Projection} */ (projectionLike) || null);\n}\n\n\n/**\n * Get the resolution of the point in degrees or distance units.\n * For projections with degrees as the unit this will simply return the\n * provided resolution. For other projections the point resolution is\n * by default estimated by transforming the 'point' pixel to EPSG:4326,\n * measuring its width and height on the normal sphere,\n * and taking the average of the width and height.\n * A custom function can be provided for a specific projection, either\n * by setting the `getPointResolution` option in the\n * {@link module:ol/proj/Projection~Projection} constructor or by using\n * {@link module:ol/proj/Projection~Projection#setGetPointResolution} to change an existing\n * projection object.\n * @param {ProjectionLike} projection The projection.\n * @param {number} resolution Nominal resolution in projection units.\n * @param {import(\"./coordinate.js\").Coordinate} point Point to find adjusted resolution at.\n * @param {Units=} opt_units Units to get the point resolution in.\n * Default is the projection's units.\n * @return {number} Point resolution.\n * @api\n */\nexport function getPointResolution(projection, resolution, point, opt_units) {\n  projection = get(projection);\n  var pointResolution;\n  var getter = projection.getPointResolutionFunc();\n  if (getter) {\n    pointResolution = getter(resolution, point);\n  } else {\n    var units = projection.getUnits();\n    if (units == Units.DEGREES && !opt_units || opt_units == Units.DEGREES) {\n      pointResolution = resolution;\n    } else {\n      // Estimate point resolution by transforming the center pixel to EPSG:4326,\n      // measuring its width and height on the normal sphere, and taking the\n      // average of the width and height.\n      var toEPSG4326 = getTransformFromProjections(projection, get('EPSG:4326'));\n      var vertices = [\n        point[0] - resolution / 2, point[1],\n        point[0] + resolution / 2, point[1],\n        point[0], point[1] - resolution / 2,\n        point[0], point[1] + resolution / 2\n      ];\n      vertices = toEPSG4326(vertices, vertices, 2);\n      var width = getDistance(vertices.slice(0, 2), vertices.slice(2, 4));\n      var height = getDistance(vertices.slice(4, 6), vertices.slice(6, 8));\n      pointResolution = (width + height) / 2;\n      var metersPerUnit = opt_units ?\n        METERS_PER_UNIT[opt_units] :\n        projection.getMetersPerUnit();\n      if (metersPerUnit !== undefined) {\n        pointResolution /= metersPerUnit;\n      }\n    }\n  }\n  return pointResolution;\n}\n\n\n/**\n * Registers transformation functions that don't alter coordinates. Those allow\n * to transform between projections with equal meaning.\n *\n * @param {Array<Projection>} projections Projections.\n * @api\n */\nexport function addEquivalentProjections(projections) {\n  addProjections(projections);\n  projections.forEach(function(source) {\n    projections.forEach(function(destination) {\n      if (source !== destination) {\n        addTransformFunc(source, destination, cloneTransform);\n      }\n    });\n  });\n}\n\n\n/**\n * Registers transformation functions to convert coordinates in any projection\n * in projection1 to any projection in projection2.\n *\n * @param {Array<Projection>} projections1 Projections with equal\n *     meaning.\n * @param {Array<Projection>} projections2 Projections with equal\n *     meaning.\n * @param {TransformFunction} forwardTransform Transformation from any\n *   projection in projection1 to any projection in projection2.\n * @param {TransformFunction} inverseTransform Transform from any projection\n *   in projection2 to any projection in projection1..\n */\nexport function addEquivalentTransforms(projections1, projections2, forwardTransform, inverseTransform) {\n  projections1.forEach(function(projection1) {\n    projections2.forEach(function(projection2) {\n      addTransformFunc(projection1, projection2, forwardTransform);\n      addTransformFunc(projection2, projection1, inverseTransform);\n    });\n  });\n}\n\n\n/**\n * Clear all cached projections and transforms.\n */\nexport function clearAllProjections() {\n  projections.clear();\n  clearTransformFuncs();\n}\n\n\n/**\n * @param {Projection|string|undefined} projection Projection.\n * @param {string} defaultCode Default code.\n * @return {Projection} Projection.\n */\nexport function createProjection(projection, defaultCode) {\n  if (!projection) {\n    return get(defaultCode);\n  } else if (typeof projection === 'string') {\n    return get(projection);\n  } else {\n    return (\n      /** @type {Projection} */ (projection)\n    );\n  }\n}\n\n\n/**\n * Creates a {@link module:ol/proj~TransformFunction} from a simple 2D coordinate transform\n * function.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} coordTransform Coordinate\n *     transform.\n * @return {TransformFunction} Transform function.\n */\nexport function createTransformFromCoordinateTransform(coordTransform) {\n  return (\n    /**\n     * @param {Array<number>} input Input.\n     * @param {Array<number>=} opt_output Output.\n     * @param {number=} opt_dimension Dimension.\n     * @return {Array<number>} Output.\n     */\n    function(input, opt_output, opt_dimension) {\n      var length = input.length;\n      var dimension = opt_dimension !== undefined ? opt_dimension : 2;\n      var output = opt_output !== undefined ? opt_output : new Array(length);\n      for (var i = 0; i < length; i += dimension) {\n        var point = coordTransform([input[i], input[i + 1]]);\n        output[i] = point[0];\n        output[i + 1] = point[1];\n        for (var j = dimension - 1; j >= 2; --j) {\n          output[i + j] = input[i + j];\n        }\n      }\n      return output;\n    });\n}\n\n\n/**\n * Registers coordinate transform functions to convert coordinates between the\n * source projection and the destination projection.\n * The forward and inverse functions convert coordinate pairs; this function\n * converts these into the functions used internally which also handle\n * extents and coordinate arrays.\n *\n * @param {ProjectionLike} source Source projection.\n * @param {ProjectionLike} destination Destination projection.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} forward The forward transform\n *     function (that is, from the source projection to the destination\n *     projection) that takes a {@link module:ol/coordinate~Coordinate} as argument and returns\n *     the transformed {@link module:ol/coordinate~Coordinate}.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} inverse The inverse transform\n *     function (that is, from the destination projection to the source\n *     projection) that takes a {@link module:ol/coordinate~Coordinate} as argument and returns\n *     the transformed {@link module:ol/coordinate~Coordinate}.\n * @api\n */\nexport function addCoordinateTransforms(source, destination, forward, inverse) {\n  var sourceProj = get(source);\n  var destProj = get(destination);\n  addTransformFunc(sourceProj, destProj, createTransformFromCoordinateTransform(forward));\n  addTransformFunc(destProj, sourceProj, createTransformFromCoordinateTransform(inverse));\n}\n\n\n/**\n * Transforms a coordinate from longitude/latitude to a different projection.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate as longitude and latitude, i.e.\n *     an array with longitude as 1st and latitude as 2nd element.\n * @param {ProjectionLike=} opt_projection Target projection. The\n *     default is Web Mercator, i.e. 'EPSG:3857'.\n * @return {import(\"./coordinate.js\").Coordinate} Coordinate projected to the target projection.\n * @api\n */\nexport function fromLonLat(coordinate, opt_projection) {\n  return transform(coordinate, 'EPSG:4326',\n    opt_projection !== undefined ? opt_projection : 'EPSG:3857');\n}\n\n\n/**\n * Transforms a coordinate to longitude/latitude.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Projected coordinate.\n * @param {ProjectionLike=} opt_projection Projection of the coordinate.\n *     The default is Web Mercator, i.e. 'EPSG:3857'.\n * @return {import(\"./coordinate.js\").Coordinate} Coordinate as longitude and latitude, i.e. an array\n *     with longitude as 1st and latitude as 2nd element.\n * @api\n */\nexport function toLonLat(coordinate, opt_projection) {\n  var lonLat = transform(coordinate,\n    opt_projection !== undefined ? opt_projection : 'EPSG:3857', 'EPSG:4326');\n  var lon = lonLat[0];\n  if (lon < -180 || lon > 180) {\n    lonLat[0] = modulo(lon + 180, 360) - 180;\n  }\n  return lonLat;\n}\n\n\n/**\n * Checks if two projections are the same, that is every coordinate in one\n * projection does represent the same geographic point as the same coordinate in\n * the other projection.\n *\n * @param {Projection} projection1 Projection 1.\n * @param {Projection} projection2 Projection 2.\n * @return {boolean} Equivalent.\n * @api\n */\nexport function equivalent(projection1, projection2) {\n  if (projection1 === projection2) {\n    return true;\n  }\n  var equalUnits = projection1.getUnits() === projection2.getUnits();\n  if (projection1.getCode() === projection2.getCode()) {\n    return equalUnits;\n  } else {\n    var transformFunc = getTransformFromProjections(projection1, projection2);\n    return transformFunc === cloneTransform && equalUnits;\n  }\n}\n\n\n/**\n * Searches in the list of transform functions for the function for converting\n * coordinates from the source projection to the destination projection.\n *\n * @param {Projection} sourceProjection Source Projection object.\n * @param {Projection} destinationProjection Destination Projection\n *     object.\n * @return {TransformFunction} Transform function.\n */\nexport function getTransformFromProjections(sourceProjection, destinationProjection) {\n  var sourceCode = sourceProjection.getCode();\n  var destinationCode = destinationProjection.getCode();\n  var transformFunc = getTransformFunc(sourceCode, destinationCode);\n  if (!transformFunc) {\n    transformFunc = identityTransform;\n  }\n  return transformFunc;\n}\n\n\n/**\n * Given the projection-like objects, searches for a transformation\n * function to convert a coordinates array from the source projection to the\n * destination projection.\n *\n * @param {ProjectionLike} source Source.\n * @param {ProjectionLike} destination Destination.\n * @return {TransformFunction} Transform function.\n * @api\n */\nexport function getTransform(source, destination) {\n  var sourceProjection = get(source);\n  var destinationProjection = get(destination);\n  return getTransformFromProjections(sourceProjection, destinationProjection);\n}\n\n\n/**\n * Transforms a coordinate from source projection to destination projection.\n * This returns a new coordinate (and does not modify the original).\n *\n * See {@link module:ol/proj~transformExtent} for extent transformation.\n * See the transform method of {@link module:ol/geom/Geometry~Geometry} and its\n * subclasses for geometry transforms.\n *\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {ProjectionLike} source Source projection-like.\n * @param {ProjectionLike} destination Destination projection-like.\n * @return {import(\"./coordinate.js\").Coordinate} Coordinate.\n * @api\n */\nexport function transform(coordinate, source, destination) {\n  var transformFunc = getTransform(source, destination);\n  return transformFunc(coordinate, undefined, coordinate.length);\n}\n\n\n/**\n * Transforms an extent from source projection to destination projection.  This\n * returns a new extent (and does not modify the original).\n *\n * @param {import(\"./extent.js\").Extent} extent The extent to transform.\n * @param {ProjectionLike} source Source projection-like.\n * @param {ProjectionLike} destination Destination projection-like.\n * @return {import(\"./extent.js\").Extent} The transformed extent.\n * @api\n */\nexport function transformExtent(extent, source, destination) {\n  var transformFunc = getTransform(source, destination);\n  return applyTransform(extent, transformFunc);\n}\n\n\n/**\n * Transforms the given point to the destination projection.\n *\n * @param {import(\"./coordinate.js\").Coordinate} point Point.\n * @param {Projection} sourceProjection Source projection.\n * @param {Projection} destinationProjection Destination projection.\n * @return {import(\"./coordinate.js\").Coordinate} Point.\n */\nexport function transformWithProjections(point, sourceProjection, destinationProjection) {\n  var transformFunc = getTransformFromProjections(sourceProjection, destinationProjection);\n  return transformFunc(point);\n}\n\n/**\n * Add transforms to and from EPSG:4326 and EPSG:3857.  This function is called\n * by when this module is executed and should only need to be called again after\n * `clearAllProjections()` is called (e.g. in tests).\n */\nexport function addCommon() {\n  // Add transformations that don't alter coordinates to convert within set of\n  // projections with equal meaning.\n  addEquivalentProjections(EPSG3857_PROJECTIONS);\n  addEquivalentProjections(EPSG4326_PROJECTIONS);\n  // Add transformations to convert EPSG:4326 like coordinates to EPSG:3857 like\n  // coordinates and back.\n  addEquivalentTransforms(EPSG4326_PROJECTIONS, EPSG3857_PROJECTIONS, fromEPSG4326, toEPSG4326);\n}\n\naddCommon();\n\n//# sourceMappingURL=proj.js.map","/**\n * @module ol/transform\n */\nimport {assert} from './asserts.js';\n\n\n/**\n * An array representing an affine 2d transformation for use with\n * {@link module:ol/transform} functions. The array has 6 elements.\n * @typedef {!Array<number>} Transform\n */\n\n\n/**\n * Collection of affine 2d transformation functions. The functions work on an\n * array of 6 elements. The element order is compatible with the [SVGMatrix\n * interface](https://developer.mozilla.org/en-US/docs/Web/API/SVGMatrix) and is\n * a subset (elements a to f) of a 3×3 matrix:\n * ```\n * [ a c e ]\n * [ b d f ]\n * [ 0 0 1 ]\n * ```\n */\n\n\n/**\n * @private\n * @type {Transform}\n */\nvar tmp_ = new Array(6);\n\n\n/**\n * Create an identity transform.\n * @return {!Transform} Identity transform.\n */\nexport function create() {\n  return [1, 0, 0, 1, 0, 0];\n}\n\n\n/**\n * Resets the given transform to an identity transform.\n * @param {!Transform} transform Transform.\n * @return {!Transform} Transform.\n */\nexport function reset(transform) {\n  return set(transform, 1, 0, 0, 1, 0, 0);\n}\n\n\n/**\n * Multiply the underlying matrices of two transforms and return the result in\n * the first transform.\n * @param {!Transform} transform1 Transform parameters of matrix 1.\n * @param {!Transform} transform2 Transform parameters of matrix 2.\n * @return {!Transform} transform1 multiplied with transform2.\n */\nexport function multiply(transform1, transform2) {\n  var a1 = transform1[0];\n  var b1 = transform1[1];\n  var c1 = transform1[2];\n  var d1 = transform1[3];\n  var e1 = transform1[4];\n  var f1 = transform1[5];\n  var a2 = transform2[0];\n  var b2 = transform2[1];\n  var c2 = transform2[2];\n  var d2 = transform2[3];\n  var e2 = transform2[4];\n  var f2 = transform2[5];\n\n  transform1[0] = a1 * a2 + c1 * b2;\n  transform1[1] = b1 * a2 + d1 * b2;\n  transform1[2] = a1 * c2 + c1 * d2;\n  transform1[3] = b1 * c2 + d1 * d2;\n  transform1[4] = a1 * e2 + c1 * f2 + e1;\n  transform1[5] = b1 * e2 + d1 * f2 + f1;\n\n  return transform1;\n}\n\n/**\n * Set the transform components a-f on a given transform.\n * @param {!Transform} transform Transform.\n * @param {number} a The a component of the transform.\n * @param {number} b The b component of the transform.\n * @param {number} c The c component of the transform.\n * @param {number} d The d component of the transform.\n * @param {number} e The e component of the transform.\n * @param {number} f The f component of the transform.\n * @return {!Transform} Matrix with transform applied.\n */\nexport function set(transform, a, b, c, d, e, f) {\n  transform[0] = a;\n  transform[1] = b;\n  transform[2] = c;\n  transform[3] = d;\n  transform[4] = e;\n  transform[5] = f;\n  return transform;\n}\n\n\n/**\n * Set transform on one matrix from another matrix.\n * @param {!Transform} transform1 Matrix to set transform to.\n * @param {!Transform} transform2 Matrix to set transform from.\n * @return {!Transform} transform1 with transform from transform2 applied.\n */\nexport function setFromArray(transform1, transform2) {\n  transform1[0] = transform2[0];\n  transform1[1] = transform2[1];\n  transform1[2] = transform2[2];\n  transform1[3] = transform2[3];\n  transform1[4] = transform2[4];\n  transform1[5] = transform2[5];\n  return transform1;\n}\n\n\n/**\n * Transforms the given coordinate with the given transform returning the\n * resulting, transformed coordinate. The coordinate will be modified in-place.\n *\n * @param {Transform} transform The transformation.\n * @param {import(\"./coordinate.js\").Coordinate|import(\"./pixel.js\").Pixel} coordinate The coordinate to transform.\n * @return {import(\"./coordinate.js\").Coordinate|import(\"./pixel.js\").Pixel} return coordinate so that operations can be\n *     chained together.\n */\nexport function apply(transform, coordinate) {\n  var x = coordinate[0];\n  var y = coordinate[1];\n  coordinate[0] = transform[0] * x + transform[2] * y + transform[4];\n  coordinate[1] = transform[1] * x + transform[3] * y + transform[5];\n  return coordinate;\n}\n\n\n/**\n * Applies rotation to the given transform.\n * @param {!Transform} transform Transform.\n * @param {number} angle Angle in radians.\n * @return {!Transform} The rotated transform.\n */\nexport function rotate(transform, angle) {\n  var cos = Math.cos(angle);\n  var sin = Math.sin(angle);\n  return multiply(transform, set(tmp_, cos, sin, -sin, cos, 0, 0));\n}\n\n\n/**\n * Applies scale to a given transform.\n * @param {!Transform} transform Transform.\n * @param {number} x Scale factor x.\n * @param {number} y Scale factor y.\n * @return {!Transform} The scaled transform.\n */\nexport function scale(transform, x, y) {\n  return multiply(transform, set(tmp_, x, 0, 0, y, 0, 0));\n}\n\n\n/**\n * Applies translation to the given transform.\n * @param {!Transform} transform Transform.\n * @param {number} dx Translation x.\n * @param {number} dy Translation y.\n * @return {!Transform} The translated transform.\n */\nexport function translate(transform, dx, dy) {\n  return multiply(transform, set(tmp_, 1, 0, 0, 1, dx, dy));\n}\n\n\n/**\n * Creates a composite transform given an initial translation, scale, rotation, and\n * final translation (in that order only, not commutative).\n * @param {!Transform} transform The transform (will be modified in place).\n * @param {number} dx1 Initial translation x.\n * @param {number} dy1 Initial translation y.\n * @param {number} sx Scale factor x.\n * @param {number} sy Scale factor y.\n * @param {number} angle Rotation (in counter-clockwise radians).\n * @param {number} dx2 Final translation x.\n * @param {number} dy2 Final translation y.\n * @return {!Transform} The composite transform.\n */\nexport function compose(transform, dx1, dy1, sx, sy, angle, dx2, dy2) {\n  var sin = Math.sin(angle);\n  var cos = Math.cos(angle);\n  transform[0] = sx * cos;\n  transform[1] = sy * sin;\n  transform[2] = -sx * sin;\n  transform[3] = sy * cos;\n  transform[4] = dx2 * sx * cos - dy2 * sx * sin + dx1;\n  transform[5] = dx2 * sy * sin + dy2 * sy * cos + dy1;\n  return transform;\n}\n\n\n/**\n * Invert the given transform.\n * @param {!Transform} transform Transform.\n * @return {!Transform} Inverse of the transform.\n */\nexport function invert(transform) {\n  var det = determinant(transform);\n  assert(det !== 0, 32); // Transformation matrix cannot be inverted\n\n  var a = transform[0];\n  var b = transform[1];\n  var c = transform[2];\n  var d = transform[3];\n  var e = transform[4];\n  var f = transform[5];\n\n  transform[0] = d / det;\n  transform[1] = -b / det;\n  transform[2] = -c / det;\n  transform[3] = a / det;\n  transform[4] = (c * f - d * e) / det;\n  transform[5] = -(a * f - b * e) / det;\n\n  return transform;\n}\n\n\n/**\n * Returns the determinant of the given matrix.\n * @param {!Transform} mat Matrix.\n * @return {number} Determinant.\n */\nexport function determinant(mat) {\n  return mat[0] * mat[3] - mat[1] * mat[2];\n}\n\n//# sourceMappingURL=transform.js.map","/**\n * @module ol/geom/Geometry\n */\nimport {abstract} from '../util.js';\nimport BaseObject from '../Object.js';\nimport {createEmpty, getHeight, returnOrUpdate} from '../extent.js';\nimport {transform2D} from './flat/transform.js';\nimport {get as getProjection, getTransform} from '../proj.js';\nimport Units from '../proj/Units.js';\nimport {create as createTransform, compose as composeTransform} from '../transform.js';\n\n\n/**\n * @type {import(\"../transform.js\").Transform}\n */\nvar tmpTransform = createTransform();\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for vector geometries.\n *\n * To get notified of changes to the geometry, register a listener for the\n * generic `change` event on your geometry instance.\n *\n * @abstract\n * @api\n */\nvar Geometry = /*@__PURE__*/(function (BaseObject) {\n  function Geometry() {\n\n    BaseObject.call(this);\n\n    /**\n     * @private\n     * @type {import(\"../extent.js\").Extent}\n     */\n    this.extent_ = createEmpty();\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.extentRevision_ = -1;\n\n    /**\n     * @protected\n     * @type {Object<string, Geometry>}\n     */\n    this.simplifiedGeometryCache = {};\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.simplifiedGeometryMaxMinSquaredTolerance = 0;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.simplifiedGeometryRevision = 0;\n\n  }\n\n  if ( BaseObject ) Geometry.__proto__ = BaseObject;\n  Geometry.prototype = Object.create( BaseObject && BaseObject.prototype );\n  Geometry.prototype.constructor = Geometry;\n\n  /**\n   * Make a complete copy of the geometry.\n   * @abstract\n   * @return {!Geometry} Clone.\n   */\n  Geometry.prototype.clone = function clone () {\n    return abstract();\n  };\n\n  /**\n   * @abstract\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n   * @param {number} minSquaredDistance Minimum squared distance.\n   * @return {number} Minimum squared distance.\n   */\n  Geometry.prototype.closestPointXY = function closestPointXY (x, y, closestPoint, minSquaredDistance) {\n    return abstract();\n  };\n\n  /**\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @return {boolean} Contains (x, y).\n   */\n  Geometry.prototype.containsXY = function containsXY (x, y) {\n    return false;\n  };\n\n  /**\n   * Return the closest point of the geometry to the passed point as\n   * {@link module:ol/coordinate~Coordinate coordinate}.\n   * @param {import(\"../coordinate.js\").Coordinate} point Point.\n   * @param {import(\"../coordinate.js\").Coordinate=} opt_closestPoint Closest point.\n   * @return {import(\"../coordinate.js\").Coordinate} Closest point.\n   * @api\n   */\n  Geometry.prototype.getClosestPoint = function getClosestPoint (point, opt_closestPoint) {\n    var closestPoint = opt_closestPoint ? opt_closestPoint : [NaN, NaN];\n    this.closestPointXY(point[0], point[1], closestPoint, Infinity);\n    return closestPoint;\n  };\n\n  /**\n   * Returns true if this geometry includes the specified coordinate. If the\n   * coordinate is on the boundary of the geometry, returns false.\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @return {boolean} Contains coordinate.\n   * @api\n   */\n  Geometry.prototype.intersectsCoordinate = function intersectsCoordinate (coordinate) {\n    return this.containsXY(coordinate[0], coordinate[1]);\n  };\n\n  /**\n   * @abstract\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @protected\n   * @return {import(\"../extent.js\").Extent} extent Extent.\n   */\n  Geometry.prototype.computeExtent = function computeExtent (extent) {\n    return abstract();\n  };\n\n  /**\n   * Get the extent of the geometry.\n   * @param {import(\"../extent.js\").Extent=} opt_extent Extent.\n   * @return {import(\"../extent.js\").Extent} extent Extent.\n   * @api\n   */\n  Geometry.prototype.getExtent = function getExtent (opt_extent) {\n    if (this.extentRevision_ != this.getRevision()) {\n      this.extent_ = this.computeExtent(this.extent_);\n      this.extentRevision_ = this.getRevision();\n    }\n    return returnOrUpdate(this.extent_, opt_extent);\n  };\n\n  /**\n   * Rotate the geometry around a given coordinate. This modifies the geometry\n   * coordinates in place.\n   * @abstract\n   * @param {number} angle Rotation angle in radians.\n   * @param {import(\"../coordinate.js\").Coordinate} anchor The rotation center.\n   * @api\n   */\n  Geometry.prototype.rotate = function rotate (angle, anchor) {\n    abstract();\n  };\n\n  /**\n   * Scale the geometry (with an optional origin).  This modifies the geometry\n   * coordinates in place.\n   * @abstract\n   * @param {number} sx The scaling factor in the x-direction.\n   * @param {number=} opt_sy The scaling factor in the y-direction (defaults to\n   *     sx).\n   * @param {import(\"../coordinate.js\").Coordinate=} opt_anchor The scale origin (defaults to the center\n   *     of the geometry extent).\n   * @api\n   */\n  Geometry.prototype.scale = function scale (sx, opt_sy, opt_anchor) {\n    abstract();\n  };\n\n  /**\n   * Create a simplified version of this geometry.  For linestrings, this uses\n   * the the {@link\n   * https://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm\n   * Douglas Peucker} algorithm.  For polygons, a quantization-based\n   * simplification is used to preserve topology.\n   * @param {number} tolerance The tolerance distance for simplification.\n   * @return {Geometry} A new, simplified version of the original geometry.\n   * @api\n   */\n  Geometry.prototype.simplify = function simplify (tolerance) {\n    return this.getSimplifiedGeometry(tolerance * tolerance);\n  };\n\n  /**\n   * Create a simplified version of this geometry using the Douglas Peucker\n   * algorithm.\n   * See https://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm.\n   * @abstract\n   * @param {number} squaredTolerance Squared tolerance.\n   * @return {Geometry} Simplified geometry.\n   */\n  Geometry.prototype.getSimplifiedGeometry = function getSimplifiedGeometry (squaredTolerance) {\n    return abstract();\n  };\n\n  /**\n   * Get the type of this geometry.\n   * @abstract\n   * @return {import(\"./GeometryType.js\").default} Geometry type.\n   */\n  Geometry.prototype.getType = function getType () {\n    return abstract();\n  };\n\n  /**\n   * Apply a transform function to each coordinate of the geometry.\n   * The geometry is modified in place.\n   * If you do not want the geometry modified in place, first `clone()` it and\n   * then use this function on the clone.\n   * @abstract\n   * @param {import(\"../proj.js\").TransformFunction} transformFn Transform.\n   */\n  Geometry.prototype.applyTransform = function applyTransform (transformFn) {\n    abstract();\n  };\n\n  /**\n   * Test if the geometry and the passed extent intersect.\n   * @abstract\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @return {boolean} `true` if the geometry and the extent intersect.\n   */\n  Geometry.prototype.intersectsExtent = function intersectsExtent (extent) {\n    return abstract();\n  };\n\n  /**\n   * Translate the geometry.  This modifies the geometry coordinates in place.  If\n   * instead you want a new geometry, first `clone()` this geometry.\n   * @abstract\n   * @param {number} deltaX Delta X.\n   * @param {number} deltaY Delta Y.\n   * @api\n   */\n  Geometry.prototype.translate = function translate (deltaX, deltaY) {\n    abstract();\n  };\n\n  /**\n   * Transform each coordinate of the geometry from one coordinate reference\n   * system to another. The geometry is modified in place.\n   * For example, a line will be transformed to a line and a circle to a circle.\n   * If you do not want the geometry modified in place, first `clone()` it and\n   * then use this function on the clone.\n   *\n   * @param {import(\"../proj.js\").ProjectionLike} source The current projection.  Can be a\n   *     string identifier or a {@link module:ol/proj/Projection~Projection} object.\n   * @param {import(\"../proj.js\").ProjectionLike} destination The desired projection.  Can be a\n   *     string identifier or a {@link module:ol/proj/Projection~Projection} object.\n   * @return {Geometry} This geometry.  Note that original geometry is\n   *     modified in place.\n   * @api\n   */\n  Geometry.prototype.transform = function transform (source, destination) {\n    /** @type {import(\"../proj/Projection.js\").default} */\n    var sourceProj = getProjection(source);\n    var transformFn = sourceProj.getUnits() == Units.TILE_PIXELS ?\n      function(inCoordinates, outCoordinates, stride) {\n        var pixelExtent = sourceProj.getExtent();\n        var projectedExtent = sourceProj.getWorldExtent();\n        var scale = getHeight(projectedExtent) / getHeight(pixelExtent);\n        composeTransform(tmpTransform,\n          projectedExtent[0], projectedExtent[3],\n          scale, -scale, 0,\n          0, 0);\n        transform2D(inCoordinates, 0, inCoordinates.length, stride,\n          tmpTransform, outCoordinates);\n        return getTransform(sourceProj, destination)(inCoordinates, outCoordinates, stride);\n      } :\n      getTransform(sourceProj, destination);\n    this.applyTransform(transformFn);\n    return this;\n  };\n\n  return Geometry;\n}(BaseObject));\n\n\nexport default Geometry;\n\n//# sourceMappingURL=Geometry.js.map","/**\n * @module ol/geom/SimpleGeometry\n */\nimport {abstract} from '../util.js';\nimport {createOrUpdateFromFlatCoordinates, getCenter} from '../extent.js';\nimport Geometry from './Geometry.js';\nimport GeometryLayout from './GeometryLayout.js';\nimport {rotate, scale, translate, transform2D} from './flat/transform.js';\nimport {clear} from '../obj.js';\n\n/**\n * @classdesc\n * Abstract base class; only used for creating subclasses; do not instantiate\n * in apps, as cannot be rendered.\n *\n * @abstract\n * @api\n */\nvar SimpleGeometry = /*@__PURE__*/(function (Geometry) {\n  function SimpleGeometry() {\n\n    Geometry.call(this);\n\n    /**\n     * @protected\n     * @type {GeometryLayout}\n     */\n    this.layout = GeometryLayout.XY;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.stride = 2;\n\n    /**\n     * @protected\n     * @type {Array<number>}\n     */\n    this.flatCoordinates = null;\n\n  }\n\n  if ( Geometry ) SimpleGeometry.__proto__ = Geometry;\n  SimpleGeometry.prototype = Object.create( Geometry && Geometry.prototype );\n  SimpleGeometry.prototype.constructor = SimpleGeometry;\n\n  /**\n   * @inheritDoc\n   */\n  SimpleGeometry.prototype.computeExtent = function computeExtent (extent) {\n    return createOrUpdateFromFlatCoordinates(this.flatCoordinates,\n      0, this.flatCoordinates.length, this.stride, extent);\n  };\n\n  /**\n   * @abstract\n   * @return {Array} Coordinates.\n   */\n  SimpleGeometry.prototype.getCoordinates = function getCoordinates () {\n    return abstract();\n  };\n\n  /**\n   * Return the first coordinate of the geometry.\n   * @return {import(\"../coordinate.js\").Coordinate} First coordinate.\n   * @api\n   */\n  SimpleGeometry.prototype.getFirstCoordinate = function getFirstCoordinate () {\n    return this.flatCoordinates.slice(0, this.stride);\n  };\n\n  /**\n   * @return {Array<number>} Flat coordinates.\n   */\n  SimpleGeometry.prototype.getFlatCoordinates = function getFlatCoordinates () {\n    return this.flatCoordinates;\n  };\n\n  /**\n   * Return the last coordinate of the geometry.\n   * @return {import(\"../coordinate.js\").Coordinate} Last point.\n   * @api\n   */\n  SimpleGeometry.prototype.getLastCoordinate = function getLastCoordinate () {\n    return this.flatCoordinates.slice(this.flatCoordinates.length - this.stride);\n  };\n\n  /**\n   * Return the {@link module:ol/geom/GeometryLayout layout} of the geometry.\n   * @return {GeometryLayout} Layout.\n   * @api\n   */\n  SimpleGeometry.prototype.getLayout = function getLayout () {\n    return this.layout;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  SimpleGeometry.prototype.getSimplifiedGeometry = function getSimplifiedGeometry (squaredTolerance) {\n    if (this.simplifiedGeometryRevision != this.getRevision()) {\n      clear(this.simplifiedGeometryCache);\n      this.simplifiedGeometryMaxMinSquaredTolerance = 0;\n      this.simplifiedGeometryRevision = this.getRevision();\n    }\n    // If squaredTolerance is negative or if we know that simplification will not\n    // have any effect then just return this.\n    if (squaredTolerance < 0 ||\n        (this.simplifiedGeometryMaxMinSquaredTolerance !== 0 &&\n         squaredTolerance <= this.simplifiedGeometryMaxMinSquaredTolerance)) {\n      return this;\n    }\n    var key = squaredTolerance.toString();\n    if (this.simplifiedGeometryCache.hasOwnProperty(key)) {\n      return this.simplifiedGeometryCache[key];\n    } else {\n      var simplifiedGeometry =\n          this.getSimplifiedGeometryInternal(squaredTolerance);\n      var simplifiedFlatCoordinates = simplifiedGeometry.getFlatCoordinates();\n      if (simplifiedFlatCoordinates.length < this.flatCoordinates.length) {\n        this.simplifiedGeometryCache[key] = simplifiedGeometry;\n        return simplifiedGeometry;\n      } else {\n        // Simplification did not actually remove any coordinates.  We now know\n        // that any calls to getSimplifiedGeometry with a squaredTolerance less\n        // than or equal to the current squaredTolerance will also not have any\n        // effect.  This allows us to short circuit simplification (saving CPU\n        // cycles) and prevents the cache of simplified geometries from filling\n        // up with useless identical copies of this geometry (saving memory).\n        this.simplifiedGeometryMaxMinSquaredTolerance = squaredTolerance;\n        return this;\n      }\n    }\n  };\n\n  /**\n   * @param {number} squaredTolerance Squared tolerance.\n   * @return {SimpleGeometry} Simplified geometry.\n   * @protected\n   */\n  SimpleGeometry.prototype.getSimplifiedGeometryInternal = function getSimplifiedGeometryInternal (squaredTolerance) {\n    return this;\n  };\n\n  /**\n   * @return {number} Stride.\n   */\n  SimpleGeometry.prototype.getStride = function getStride () {\n    return this.stride;\n  };\n\n  /**\n   * @param {GeometryLayout} layout Layout.\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   */\n  SimpleGeometry.prototype.setFlatCoordinates = function setFlatCoordinates (layout, flatCoordinates) {\n    this.stride = getStrideForLayout(layout);\n    this.layout = layout;\n    this.flatCoordinates = flatCoordinates;\n  };\n\n  /**\n   * @abstract\n   * @param {!Array} coordinates Coordinates.\n   * @param {GeometryLayout=} opt_layout Layout.\n   */\n  SimpleGeometry.prototype.setCoordinates = function setCoordinates (coordinates, opt_layout) {\n    abstract();\n  };\n\n  /**\n   * @param {GeometryLayout|undefined} layout Layout.\n   * @param {Array} coordinates Coordinates.\n   * @param {number} nesting Nesting.\n   * @protected\n   */\n  SimpleGeometry.prototype.setLayout = function setLayout (layout, coordinates, nesting) {\n    /** @type {number} */\n    var stride;\n    if (layout) {\n      stride = getStrideForLayout(layout);\n    } else {\n      for (var i = 0; i < nesting; ++i) {\n        if (coordinates.length === 0) {\n          this.layout = GeometryLayout.XY;\n          this.stride = 2;\n          return;\n        } else {\n          coordinates = /** @type {Array} */ (coordinates[0]);\n        }\n      }\n      stride = coordinates.length;\n      layout = getLayoutForStride(stride);\n    }\n    this.layout = layout;\n    this.stride = stride;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  SimpleGeometry.prototype.applyTransform = function applyTransform (transformFn) {\n    if (this.flatCoordinates) {\n      transformFn(this.flatCoordinates, this.flatCoordinates, this.stride);\n      this.changed();\n    }\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  SimpleGeometry.prototype.rotate = function rotate$1 (angle, anchor) {\n    var flatCoordinates = this.getFlatCoordinates();\n    if (flatCoordinates) {\n      var stride = this.getStride();\n      rotate(\n        flatCoordinates, 0, flatCoordinates.length,\n        stride, angle, anchor, flatCoordinates);\n      this.changed();\n    }\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  SimpleGeometry.prototype.scale = function scale$1 (sx, opt_sy, opt_anchor) {\n    var sy = opt_sy;\n    if (sy === undefined) {\n      sy = sx;\n    }\n    var anchor = opt_anchor;\n    if (!anchor) {\n      anchor = getCenter(this.getExtent());\n    }\n    var flatCoordinates = this.getFlatCoordinates();\n    if (flatCoordinates) {\n      var stride = this.getStride();\n      scale(\n        flatCoordinates, 0, flatCoordinates.length,\n        stride, sx, sy, anchor, flatCoordinates);\n      this.changed();\n    }\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  SimpleGeometry.prototype.translate = function translate$1 (deltaX, deltaY) {\n    var flatCoordinates = this.getFlatCoordinates();\n    if (flatCoordinates) {\n      var stride = this.getStride();\n      translate(\n        flatCoordinates, 0, flatCoordinates.length, stride,\n        deltaX, deltaY, flatCoordinates);\n      this.changed();\n    }\n  };\n\n  return SimpleGeometry;\n}(Geometry));\n\n\n/**\n * @param {number} stride Stride.\n * @return {GeometryLayout} layout Layout.\n */\nfunction getLayoutForStride(stride) {\n  var layout;\n  if (stride == 2) {\n    layout = GeometryLayout.XY;\n  } else if (stride == 3) {\n    layout = GeometryLayout.XYZ;\n  } else if (stride == 4) {\n    layout = GeometryLayout.XYZM;\n  }\n  return (\n    /** @type {GeometryLayout} */ (layout)\n  );\n}\n\n\n/**\n * @param {GeometryLayout} layout Layout.\n * @return {number} Stride.\n */\nexport function getStrideForLayout(layout) {\n  var stride;\n  if (layout == GeometryLayout.XY) {\n    stride = 2;\n  } else if (layout == GeometryLayout.XYZ || layout == GeometryLayout.XYM) {\n    stride = 3;\n  } else if (layout == GeometryLayout.XYZM) {\n    stride = 4;\n  }\n  return /** @type {number} */ (stride);\n}\n\n\n/**\n * @param {SimpleGeometry} simpleGeometry Simple geometry.\n * @param {import(\"../transform.js\").Transform} transform Transform.\n * @param {Array<number>=} opt_dest Destination.\n * @return {Array<number>} Transformed flat coordinates.\n */\nexport function transformGeom2D(simpleGeometry, transform, opt_dest) {\n  var flatCoordinates = simpleGeometry.getFlatCoordinates();\n  if (!flatCoordinates) {\n    return null;\n  } else {\n    var stride = simpleGeometry.getStride();\n    return transform2D(\n      flatCoordinates, 0, flatCoordinates.length, stride,\n      transform, opt_dest);\n  }\n}\n\nexport default SimpleGeometry;\n\n//# sourceMappingURL=SimpleGeometry.js.map","/**\n * @module ol/geom/flat/area\n */\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRing(flatCoordinates, offset, end, stride) {\n  var twiceArea = 0;\n  var x1 = flatCoordinates[end - stride];\n  var y1 = flatCoordinates[end - stride + 1];\n  for (; offset < end; offset += stride) {\n    var x2 = flatCoordinates[offset];\n    var y2 = flatCoordinates[offset + 1];\n    twiceArea += y1 * x2 - x1 * y2;\n    x1 = x2;\n    y1 = y2;\n  }\n  return twiceArea / 2;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRings(flatCoordinates, offset, ends, stride) {\n  var area = 0;\n  for (var i = 0, ii = ends.length; i < ii; ++i) {\n    var end = ends[i];\n    area += linearRing(flatCoordinates, offset, end, stride);\n    offset = end;\n  }\n  return area;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRingss(flatCoordinates, offset, endss, stride) {\n  var area = 0;\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    var ends = endss[i];\n    area += linearRings(flatCoordinates, offset, ends, stride);\n    offset = ends[ends.length - 1];\n  }\n  return area;\n}\n\n//# sourceMappingURL=area.js.map","/**\n * @module ol/geom/flat/closest\n */\nimport {lerp, squaredDistance as squaredDx} from '../../math.js';\n\n\n/**\n * Returns the point on the 2D line segment flatCoordinates[offset1] to\n * flatCoordinates[offset2] that is closest to the point (x, y).  Extra\n * dimensions are linearly interpolated.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset1 Offset 1.\n * @param {number} offset2 Offset 2.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array<number>} closestPoint Closest point.\n */\nfunction assignClosest(flatCoordinates, offset1, offset2, stride, x, y, closestPoint) {\n  var x1 = flatCoordinates[offset1];\n  var y1 = flatCoordinates[offset1 + 1];\n  var dx = flatCoordinates[offset2] - x1;\n  var dy = flatCoordinates[offset2 + 1] - y1;\n  var offset;\n  if (dx === 0 && dy === 0) {\n    offset = offset1;\n  } else {\n    var t = ((x - x1) * dx + (y - y1) * dy) / (dx * dx + dy * dy);\n    if (t > 1) {\n      offset = offset2;\n    } else if (t > 0) {\n      for (var i = 0; i < stride; ++i) {\n        closestPoint[i] = lerp(flatCoordinates[offset1 + i],\n          flatCoordinates[offset2 + i], t);\n      }\n      closestPoint.length = stride;\n      return;\n    } else {\n      offset = offset1;\n    }\n  }\n  for (var i$1 = 0; i$1 < stride; ++i$1) {\n    closestPoint[i$1] = flatCoordinates[offset + i$1];\n  }\n  closestPoint.length = stride;\n}\n\n\n/**\n * Return the squared of the largest distance between any pair of consecutive\n * coordinates.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function maxSquaredDelta(flatCoordinates, offset, end, stride, max) {\n  var x1 = flatCoordinates[offset];\n  var y1 = flatCoordinates[offset + 1];\n  for (offset += stride; offset < end; offset += stride) {\n    var x2 = flatCoordinates[offset];\n    var y2 = flatCoordinates[offset + 1];\n    var squaredDelta = squaredDx(x1, y1, x2, y2);\n    if (squaredDelta > max) {\n      max = squaredDelta;\n    }\n    x1 = x2;\n    y1 = y2;\n  }\n  return max;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function arrayMaxSquaredDelta(flatCoordinates, offset, ends, stride, max) {\n  for (var i = 0, ii = ends.length; i < ii; ++i) {\n    var end = ends[i];\n    max = maxSquaredDelta(\n      flatCoordinates, offset, end, stride, max);\n    offset = end;\n  }\n  return max;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function multiArrayMaxSquaredDelta(flatCoordinates, offset, endss, stride, max) {\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    var ends = endss[i];\n    max = arrayMaxSquaredDelta(\n      flatCoordinates, offset, ends, stride, max);\n    offset = ends[ends.length - 1];\n  }\n  return max;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array<number>} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array<number>=} opt_tmpPoint Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestPoint(flatCoordinates, offset, end,\n  stride, maxDelta, isRing, x, y, closestPoint, minSquaredDistance,\n  opt_tmpPoint) {\n  if (offset == end) {\n    return minSquaredDistance;\n  }\n  var i, squaredDistance;\n  if (maxDelta === 0) {\n    // All points are identical, so just test the first point.\n    squaredDistance = squaredDx(\n      x, y, flatCoordinates[offset], flatCoordinates[offset + 1]);\n    if (squaredDistance < minSquaredDistance) {\n      for (i = 0; i < stride; ++i) {\n        closestPoint[i] = flatCoordinates[offset + i];\n      }\n      closestPoint.length = stride;\n      return squaredDistance;\n    } else {\n      return minSquaredDistance;\n    }\n  }\n  var tmpPoint = opt_tmpPoint ? opt_tmpPoint : [NaN, NaN];\n  var index = offset + stride;\n  while (index < end) {\n    assignClosest(\n      flatCoordinates, index - stride, index, stride, x, y, tmpPoint);\n    squaredDistance = squaredDx(x, y, tmpPoint[0], tmpPoint[1]);\n    if (squaredDistance < minSquaredDistance) {\n      minSquaredDistance = squaredDistance;\n      for (i = 0; i < stride; ++i) {\n        closestPoint[i] = tmpPoint[i];\n      }\n      closestPoint.length = stride;\n      index += stride;\n    } else {\n      // Skip ahead multiple points, because we know that all the skipped\n      // points cannot be any closer than the closest point we have found so\n      // far.  We know this because we know how close the current point is, how\n      // close the closest point we have found so far is, and the maximum\n      // distance between consecutive points.  For example, if we're currently\n      // at distance 10, the best we've found so far is 3, and that the maximum\n      // distance between consecutive points is 2, then we'll need to skip at\n      // least (10 - 3) / 2 == 3 (rounded down) points to have any chance of\n      // finding a closer point.  We use Math.max(..., 1) to ensure that we\n      // always advance at least one point, to avoid an infinite loop.\n      index += stride * Math.max(\n        ((Math.sqrt(squaredDistance) -\n            Math.sqrt(minSquaredDistance)) / maxDelta) | 0, 1);\n    }\n  }\n  if (isRing) {\n    // Check the closing segment.\n    assignClosest(\n      flatCoordinates, end - stride, offset, stride, x, y, tmpPoint);\n    squaredDistance = squaredDx(x, y, tmpPoint[0], tmpPoint[1]);\n    if (squaredDistance < minSquaredDistance) {\n      minSquaredDistance = squaredDistance;\n      for (i = 0; i < stride; ++i) {\n        closestPoint[i] = tmpPoint[i];\n      }\n      closestPoint.length = stride;\n    }\n  }\n  return minSquaredDistance;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array<number>} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array<number>=} opt_tmpPoint Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestArrayPoint(flatCoordinates, offset, ends,\n  stride, maxDelta, isRing, x, y, closestPoint, minSquaredDistance,\n  opt_tmpPoint) {\n  var tmpPoint = opt_tmpPoint ? opt_tmpPoint : [NaN, NaN];\n  for (var i = 0, ii = ends.length; i < ii; ++i) {\n    var end = ends[i];\n    minSquaredDistance = assignClosestPoint(\n      flatCoordinates, offset, end, stride,\n      maxDelta, isRing, x, y, closestPoint, minSquaredDistance, tmpPoint);\n    offset = end;\n  }\n  return minSquaredDistance;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array<number>} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array<number>=} opt_tmpPoint Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestMultiArrayPoint(flatCoordinates, offset,\n  endss, stride, maxDelta, isRing, x, y, closestPoint, minSquaredDistance,\n  opt_tmpPoint) {\n  var tmpPoint = opt_tmpPoint ? opt_tmpPoint : [NaN, NaN];\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    var ends = endss[i];\n    minSquaredDistance = assignClosestArrayPoint(\n      flatCoordinates, offset, ends, stride,\n      maxDelta, isRing, x, y, closestPoint, minSquaredDistance, tmpPoint);\n    offset = ends[ends.length - 1];\n  }\n  return minSquaredDistance;\n}\n\n//# sourceMappingURL=closest.js.map","/**\n * @module ol/geom/flat/deflate\n */\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {number} stride Stride.\n * @return {number} offset Offset.\n */\nexport function deflateCoordinate(flatCoordinates, offset, coordinate, stride) {\n  for (var i = 0, ii = coordinate.length; i < ii; ++i) {\n    flatCoordinates[offset++] = coordinate[i];\n  }\n  return offset;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<import(\"../../coordinate.js\").Coordinate>} coordinates Coordinates.\n * @param {number} stride Stride.\n * @return {number} offset Offset.\n */\nexport function deflateCoordinates(flatCoordinates, offset, coordinates, stride) {\n  for (var i = 0, ii = coordinates.length; i < ii; ++i) {\n    var coordinate = coordinates[i];\n    for (var j = 0; j < stride; ++j) {\n      flatCoordinates[offset++] = coordinate[j];\n    }\n  }\n  return offset;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<import(\"../../coordinate.js\").Coordinate>>} coordinatess Coordinatess.\n * @param {number} stride Stride.\n * @param {Array<number>=} opt_ends Ends.\n * @return {Array<number>} Ends.\n */\nexport function deflateCoordinatesArray(flatCoordinates, offset, coordinatess, stride, opt_ends) {\n  var ends = opt_ends ? opt_ends : [];\n  var i = 0;\n  for (var j = 0, jj = coordinatess.length; j < jj; ++j) {\n    var end = deflateCoordinates(\n      flatCoordinates, offset, coordinatess[j], stride);\n    ends[i++] = end;\n    offset = end;\n  }\n  ends.length = i;\n  return ends;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<Array<import(\"../../coordinate.js\").Coordinate>>>} coordinatesss Coordinatesss.\n * @param {number} stride Stride.\n * @param {Array<Array<number>>=} opt_endss Endss.\n * @return {Array<Array<number>>} Endss.\n */\nexport function deflateMultiCoordinatesArray(flatCoordinates, offset, coordinatesss, stride, opt_endss) {\n  var endss = opt_endss ? opt_endss : [];\n  var i = 0;\n  for (var j = 0, jj = coordinatesss.length; j < jj; ++j) {\n    var ends = deflateCoordinatesArray(\n      flatCoordinates, offset, coordinatesss[j], stride, endss[i]);\n    endss[i++] = ends;\n    offset = ends[ends.length - 1];\n  }\n  endss.length = i;\n  return endss;\n}\n\n//# sourceMappingURL=deflate.js.map","/**\n * @module ol/geom/flat/inflate\n */\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {Array<import(\"../../coordinate.js\").Coordinate>=} opt_coordinates Coordinates.\n * @return {Array<import(\"../../coordinate.js\").Coordinate>} Coordinates.\n */\nexport function inflateCoordinates(flatCoordinates, offset, end, stride, opt_coordinates) {\n  var coordinates = opt_coordinates !== undefined ? opt_coordinates : [];\n  var i = 0;\n  for (var j = offset; j < end; j += stride) {\n    coordinates[i++] = flatCoordinates.slice(j, j + stride);\n  }\n  coordinates.length = i;\n  return coordinates;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {Array<Array<import(\"../../coordinate.js\").Coordinate>>=} opt_coordinatess Coordinatess.\n * @return {Array<Array<import(\"../../coordinate.js\").Coordinate>>} Coordinatess.\n */\nexport function inflateCoordinatesArray(flatCoordinates, offset, ends, stride, opt_coordinatess) {\n  var coordinatess = opt_coordinatess !== undefined ? opt_coordinatess : [];\n  var i = 0;\n  for (var j = 0, jj = ends.length; j < jj; ++j) {\n    var end = ends[j];\n    coordinatess[i++] = inflateCoordinates(\n      flatCoordinates, offset, end, stride, coordinatess[i]);\n    offset = end;\n  }\n  coordinatess.length = i;\n  return coordinatess;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {Array<Array<Array<import(\"../../coordinate.js\").Coordinate>>>=} opt_coordinatesss\n *     Coordinatesss.\n * @return {Array<Array<Array<import(\"../../coordinate.js\").Coordinate>>>} Coordinatesss.\n */\nexport function inflateMultiCoordinatesArray(flatCoordinates, offset, endss, stride, opt_coordinatesss) {\n  var coordinatesss = opt_coordinatesss !== undefined ? opt_coordinatesss : [];\n  var i = 0;\n  for (var j = 0, jj = endss.length; j < jj; ++j) {\n    var ends = endss[j];\n    coordinatesss[i++] = inflateCoordinatesArray(\n      flatCoordinates, offset, ends, stride, coordinatesss[i]);\n    offset = ends[ends.length - 1];\n  }\n  coordinatesss.length = i;\n  return coordinatesss;\n}\n\n//# sourceMappingURL=inflate.js.map","/**\n * @module ol/geom/flat/simplify\n */\n// Based on simplify-js https://github.com/mourner/simplify-js\n// Copyright (c) 2012, Vladimir Agafonkin\n// All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are met:\n//\n//    1. Redistributions of source code must retain the above copyright notice,\n//       this list of conditions and the following disclaimer.\n//\n//    2. Redistributions in binary form must reproduce the above copyright\n//       notice, this list of conditions and the following disclaimer in the\n//       documentation and/or other materials provided with the distribution.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\"\n// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\n// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\n// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE\n// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\n// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\n// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS\n// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\n// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\n// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE\n// POSSIBILITY OF SUCH DAMAGE.\n\nimport {squaredSegmentDistance, squaredDistance} from '../../math.js';\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {boolean} highQuality Highest quality.\n * @param {Array<number>=} opt_simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @return {Array<number>} Simplified line string.\n */\nexport function simplifyLineString(flatCoordinates, offset, end,\n  stride, squaredTolerance, highQuality, opt_simplifiedFlatCoordinates) {\n  var simplifiedFlatCoordinates = opt_simplifiedFlatCoordinates !== undefined ?\n    opt_simplifiedFlatCoordinates : [];\n  if (!highQuality) {\n    end = radialDistance(flatCoordinates, offset, end,\n      stride, squaredTolerance,\n      simplifiedFlatCoordinates, 0);\n    flatCoordinates = simplifiedFlatCoordinates;\n    offset = 0;\n    stride = 2;\n  }\n  simplifiedFlatCoordinates.length = douglasPeucker(\n    flatCoordinates, offset, end, stride, squaredTolerance,\n    simplifiedFlatCoordinates, 0);\n  return simplifiedFlatCoordinates;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function douglasPeucker(flatCoordinates, offset, end,\n  stride, squaredTolerance, simplifiedFlatCoordinates, simplifiedOffset) {\n  var n = (end - offset) / stride;\n  if (n < 3) {\n    for (; offset < end; offset += stride) {\n      simplifiedFlatCoordinates[simplifiedOffset++] =\n          flatCoordinates[offset];\n      simplifiedFlatCoordinates[simplifiedOffset++] =\n          flatCoordinates[offset + 1];\n    }\n    return simplifiedOffset;\n  }\n  /** @type {Array<number>} */\n  var markers = new Array(n);\n  markers[0] = 1;\n  markers[n - 1] = 1;\n  /** @type {Array<number>} */\n  var stack = [offset, end - stride];\n  var index = 0;\n  while (stack.length > 0) {\n    var last = stack.pop();\n    var first = stack.pop();\n    var maxSquaredDistance = 0;\n    var x1 = flatCoordinates[first];\n    var y1 = flatCoordinates[first + 1];\n    var x2 = flatCoordinates[last];\n    var y2 = flatCoordinates[last + 1];\n    for (var i = first + stride; i < last; i += stride) {\n      var x = flatCoordinates[i];\n      var y = flatCoordinates[i + 1];\n      var squaredDistance = squaredSegmentDistance(\n        x, y, x1, y1, x2, y2);\n      if (squaredDistance > maxSquaredDistance) {\n        index = i;\n        maxSquaredDistance = squaredDistance;\n      }\n    }\n    if (maxSquaredDistance > squaredTolerance) {\n      markers[(index - offset) / stride] = 1;\n      if (first + stride < index) {\n        stack.push(first, index);\n      }\n      if (index + stride < last) {\n        stack.push(index, last);\n      }\n    }\n  }\n  for (var i$1 = 0; i$1 < n; ++i$1) {\n    if (markers[i$1]) {\n      simplifiedFlatCoordinates[simplifiedOffset++] =\n          flatCoordinates[offset + i$1 * stride];\n      simplifiedFlatCoordinates[simplifiedOffset++] =\n          flatCoordinates[offset + i$1 * stride + 1];\n    }\n  }\n  return simplifiedOffset;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array<number>} simplifiedEnds Simplified ends.\n * @return {number} Simplified offset.\n */\nexport function douglasPeuckerArray(flatCoordinates, offset,\n  ends, stride, squaredTolerance, simplifiedFlatCoordinates,\n  simplifiedOffset, simplifiedEnds) {\n  for (var i = 0, ii = ends.length; i < ii; ++i) {\n    var end = ends[i];\n    simplifiedOffset = douglasPeucker(\n      flatCoordinates, offset, end, stride, squaredTolerance,\n      simplifiedFlatCoordinates, simplifiedOffset);\n    simplifiedEnds.push(simplifiedOffset);\n    offset = end;\n  }\n  return simplifiedOffset;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array<Array<number>>} simplifiedEndss Simplified endss.\n * @return {number} Simplified offset.\n */\nexport function douglasPeuckerMultiArray(\n  flatCoordinates, offset, endss, stride, squaredTolerance,\n  simplifiedFlatCoordinates, simplifiedOffset, simplifiedEndss) {\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    var ends = endss[i];\n    var simplifiedEnds = [];\n    simplifiedOffset = douglasPeuckerArray(\n      flatCoordinates, offset, ends, stride, squaredTolerance,\n      simplifiedFlatCoordinates, simplifiedOffset, simplifiedEnds);\n    simplifiedEndss.push(simplifiedEnds);\n    offset = ends[ends.length - 1];\n  }\n  return simplifiedOffset;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function radialDistance(flatCoordinates, offset, end,\n  stride, squaredTolerance, simplifiedFlatCoordinates, simplifiedOffset) {\n  if (end <= offset + stride) {\n    // zero or one point, no simplification possible, so copy and return\n    for (; offset < end; offset += stride) {\n      simplifiedFlatCoordinates[simplifiedOffset++] = flatCoordinates[offset];\n      simplifiedFlatCoordinates[simplifiedOffset++] =\n          flatCoordinates[offset + 1];\n    }\n    return simplifiedOffset;\n  }\n  var x1 = flatCoordinates[offset];\n  var y1 = flatCoordinates[offset + 1];\n  // copy first point\n  simplifiedFlatCoordinates[simplifiedOffset++] = x1;\n  simplifiedFlatCoordinates[simplifiedOffset++] = y1;\n  var x2 = x1;\n  var y2 = y1;\n  for (offset += stride; offset < end; offset += stride) {\n    x2 = flatCoordinates[offset];\n    y2 = flatCoordinates[offset + 1];\n    if (squaredDistance(x1, y1, x2, y2) > squaredTolerance) {\n      // copy point at offset\n      simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n      simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n      x1 = x2;\n      y1 = y2;\n    }\n  }\n  if (x2 != x1 || y2 != y1) {\n    // copy last point\n    simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n    simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n  }\n  return simplifiedOffset;\n}\n\n\n/**\n * @param {number} value Value.\n * @param {number} tolerance Tolerance.\n * @return {number} Rounded value.\n */\nexport function snap(value, tolerance) {\n  return tolerance * Math.round(value / tolerance);\n}\n\n\n/**\n * Simplifies a line string using an algorithm designed by Tim Schaub.\n * Coordinates are snapped to the nearest value in a virtual grid and\n * consecutive duplicate coordinates are discarded.  This effectively preserves\n * topology as the simplification of any subsection of a line string is\n * independent of the rest of the line string.  This means that, for examples,\n * the common edge between two polygons will be simplified to the same line\n * string independently in both polygons.  This implementation uses a single\n * pass over the coordinates and eliminates intermediate collinear points.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function quantize(flatCoordinates, offset, end, stride,\n  tolerance, simplifiedFlatCoordinates, simplifiedOffset) {\n  // do nothing if the line is empty\n  if (offset == end) {\n    return simplifiedOffset;\n  }\n  // snap the first coordinate (P1)\n  var x1 = snap(flatCoordinates[offset], tolerance);\n  var y1 = snap(flatCoordinates[offset + 1], tolerance);\n  offset += stride;\n  // add the first coordinate to the output\n  simplifiedFlatCoordinates[simplifiedOffset++] = x1;\n  simplifiedFlatCoordinates[simplifiedOffset++] = y1;\n  // find the next coordinate that does not snap to the same value as the first\n  // coordinate (P2)\n  var x2, y2;\n  do {\n    x2 = snap(flatCoordinates[offset], tolerance);\n    y2 = snap(flatCoordinates[offset + 1], tolerance);\n    offset += stride;\n    if (offset == end) {\n      // all coordinates snap to the same value, the line collapses to a point\n      // push the last snapped value anyway to ensure that the output contains\n      // at least two points\n      // FIXME should we really return at least two points anyway?\n      simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n      simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n      return simplifiedOffset;\n    }\n  } while (x2 == x1 && y2 == y1);\n  while (offset < end) {\n    // snap the next coordinate (P3)\n    var x3 = snap(flatCoordinates[offset], tolerance);\n    var y3 = snap(flatCoordinates[offset + 1], tolerance);\n    offset += stride;\n    // skip P3 if it is equal to P2\n    if (x3 == x2 && y3 == y2) {\n      continue;\n    }\n    // calculate the delta between P1 and P2\n    var dx1 = x2 - x1;\n    var dy1 = y2 - y1;\n    // calculate the delta between P3 and P1\n    var dx2 = x3 - x1;\n    var dy2 = y3 - y1;\n    // if P1, P2, and P3 are colinear and P3 is further from P1 than P2 is from\n    // P1 in the same direction then P2 is on the straight line between P1 and\n    // P3\n    if ((dx1 * dy2 == dy1 * dx2) &&\n        ((dx1 < 0 && dx2 < dx1) || dx1 == dx2 || (dx1 > 0 && dx2 > dx1)) &&\n        ((dy1 < 0 && dy2 < dy1) || dy1 == dy2 || (dy1 > 0 && dy2 > dy1))) {\n      // discard P2 and set P2 = P3\n      x2 = x3;\n      y2 = y3;\n      continue;\n    }\n    // either P1, P2, and P3 are not colinear, or they are colinear but P3 is\n    // between P3 and P1 or on the opposite half of the line to P2.  add P2,\n    // and continue with P1 = P2 and P2 = P3\n    simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n    simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n    x1 = x2;\n    y1 = y2;\n    x2 = x3;\n    y2 = y3;\n  }\n  // add the last point (P2)\n  simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n  simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n  return simplifiedOffset;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array<number>} simplifiedEnds Simplified ends.\n * @return {number} Simplified offset.\n */\nexport function quantizeArray(\n  flatCoordinates, offset, ends, stride,\n  tolerance,\n  simplifiedFlatCoordinates, simplifiedOffset, simplifiedEnds) {\n  for (var i = 0, ii = ends.length; i < ii; ++i) {\n    var end = ends[i];\n    simplifiedOffset = quantize(\n      flatCoordinates, offset, end, stride,\n      tolerance,\n      simplifiedFlatCoordinates, simplifiedOffset);\n    simplifiedEnds.push(simplifiedOffset);\n    offset = end;\n  }\n  return simplifiedOffset;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array<Array<number>>} simplifiedEndss Simplified endss.\n * @return {number} Simplified offset.\n */\nexport function quantizeMultiArray(\n  flatCoordinates, offset, endss, stride,\n  tolerance,\n  simplifiedFlatCoordinates, simplifiedOffset, simplifiedEndss) {\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    var ends = endss[i];\n    var simplifiedEnds = [];\n    simplifiedOffset = quantizeArray(\n      flatCoordinates, offset, ends, stride,\n      tolerance,\n      simplifiedFlatCoordinates, simplifiedOffset, simplifiedEnds);\n    simplifiedEndss.push(simplifiedEnds);\n    offset = ends[ends.length - 1];\n  }\n  return simplifiedOffset;\n}\n\n//# sourceMappingURL=simplify.js.map","/**\n * @module ol/geom/LinearRing\n */\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport GeometryLayout from './GeometryLayout.js';\nimport GeometryType from './GeometryType.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {linearRing as linearRingArea} from './flat/area.js';\nimport {assignClosestPoint, maxSquaredDelta} from './flat/closest.js';\nimport {deflateCoordinates} from './flat/deflate.js';\nimport {inflateCoordinates} from './flat/inflate.js';\nimport {douglasPeucker} from './flat/simplify.js';\n\n/**\n * @classdesc\n * Linear ring geometry. Only used as part of polygon; cannot be rendered\n * on its own.\n *\n * @api\n */\nvar LinearRing = /*@__PURE__*/(function (SimpleGeometry) {\n  function LinearRing(coordinates, opt_layout) {\n\n    SimpleGeometry.call(this);\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDelta_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDeltaRevision_ = -1;\n\n    if (opt_layout !== undefined && !Array.isArray(coordinates[0])) {\n      this.setFlatCoordinates(opt_layout, /** @type {Array<number>} */ (coordinates));\n    } else {\n      this.setCoordinates(/** @type {Array<import(\"../coordinate.js\").Coordinate>} */ (coordinates), opt_layout);\n    }\n\n  }\n\n  if ( SimpleGeometry ) LinearRing.__proto__ = SimpleGeometry;\n  LinearRing.prototype = Object.create( SimpleGeometry && SimpleGeometry.prototype );\n  LinearRing.prototype.constructor = LinearRing;\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!LinearRing} Clone.\n   * @override\n   * @api\n   */\n  LinearRing.prototype.clone = function clone () {\n    return new LinearRing(this.flatCoordinates.slice(), this.layout);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  LinearRing.prototype.closestPointXY = function closestPointXY (x, y, closestPoint, minSquaredDistance) {\n    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n      return minSquaredDistance;\n    }\n    if (this.maxDeltaRevision_ != this.getRevision()) {\n      this.maxDelta_ = Math.sqrt(maxSquaredDelta(\n        this.flatCoordinates, 0, this.flatCoordinates.length, this.stride, 0));\n      this.maxDeltaRevision_ = this.getRevision();\n    }\n    return assignClosestPoint(\n      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,\n      this.maxDelta_, true, x, y, closestPoint, minSquaredDistance);\n  };\n\n  /**\n   * Return the area of the linear ring on projected plane.\n   * @return {number} Area (on projected plane).\n   * @api\n   */\n  LinearRing.prototype.getArea = function getArea () {\n    return linearRingArea(this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);\n  };\n\n  /**\n   * Return the coordinates of the linear ring.\n   * @return {Array<import(\"../coordinate.js\").Coordinate>} Coordinates.\n   * @override\n   * @api\n   */\n  LinearRing.prototype.getCoordinates = function getCoordinates () {\n    return inflateCoordinates(\n      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  LinearRing.prototype.getSimplifiedGeometryInternal = function getSimplifiedGeometryInternal (squaredTolerance) {\n    var simplifiedFlatCoordinates = [];\n    simplifiedFlatCoordinates.length = douglasPeucker(\n      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,\n      squaredTolerance, simplifiedFlatCoordinates, 0);\n    return new LinearRing(simplifiedFlatCoordinates, GeometryLayout.XY);\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  LinearRing.prototype.getType = function getType () {\n    return GeometryType.LINEAR_RING;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  LinearRing.prototype.intersectsExtent = function intersectsExtent (extent) {\n    return false;\n  };\n\n  /**\n   * Set the coordinates of the linear ring.\n   * @param {!Array<import(\"../coordinate.js\").Coordinate>} coordinates Coordinates.\n   * @param {GeometryLayout=} opt_layout Layout.\n   * @override\n   * @api\n   */\n  LinearRing.prototype.setCoordinates = function setCoordinates (coordinates, opt_layout) {\n    this.setLayout(opt_layout, coordinates, 1);\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = [];\n    }\n    this.flatCoordinates.length = deflateCoordinates(\n      this.flatCoordinates, 0, coordinates, this.stride);\n    this.changed();\n  };\n\n  return LinearRing;\n}(SimpleGeometry));\n\n\nexport default LinearRing;\n\n//# sourceMappingURL=LinearRing.js.map","/**\n * @module ol/geom/Point\n */\nimport {createOrUpdateFromCoordinate, containsXY} from '../extent.js';\nimport GeometryType from './GeometryType.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {deflateCoordinate} from './flat/deflate.js';\nimport {squaredDistance as squaredDx} from '../math.js';\n\n/**\n * @classdesc\n * Point geometry.\n *\n * @api\n */\nvar Point = /*@__PURE__*/(function (SimpleGeometry) {\n  function Point(coordinates, opt_layout) {\n    SimpleGeometry.call(this);\n    this.setCoordinates(coordinates, opt_layout);\n  }\n\n  if ( SimpleGeometry ) Point.__proto__ = SimpleGeometry;\n  Point.prototype = Object.create( SimpleGeometry && SimpleGeometry.prototype );\n  Point.prototype.constructor = Point;\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!Point} Clone.\n   * @override\n   * @api\n   */\n  Point.prototype.clone = function clone () {\n    var point = new Point(this.flatCoordinates.slice(), this.layout);\n    return point;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  Point.prototype.closestPointXY = function closestPointXY (x, y, closestPoint, minSquaredDistance) {\n    var flatCoordinates = this.flatCoordinates;\n    var squaredDistance = squaredDx(x, y, flatCoordinates[0], flatCoordinates[1]);\n    if (squaredDistance < minSquaredDistance) {\n      var stride = this.stride;\n      for (var i = 0; i < stride; ++i) {\n        closestPoint[i] = flatCoordinates[i];\n      }\n      closestPoint.length = stride;\n      return squaredDistance;\n    } else {\n      return minSquaredDistance;\n    }\n  };\n\n  /**\n   * Return the coordinate of the point.\n   * @return {import(\"../coordinate.js\").Coordinate} Coordinates.\n   * @override\n   * @api\n   */\n  Point.prototype.getCoordinates = function getCoordinates () {\n    return !this.flatCoordinates ? [] : this.flatCoordinates.slice();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  Point.prototype.computeExtent = function computeExtent (extent) {\n    return createOrUpdateFromCoordinate(this.flatCoordinates, extent);\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  Point.prototype.getType = function getType () {\n    return GeometryType.POINT;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  Point.prototype.intersectsExtent = function intersectsExtent (extent) {\n    return containsXY(extent, this.flatCoordinates[0], this.flatCoordinates[1]);\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  Point.prototype.setCoordinates = function setCoordinates (coordinates, opt_layout) {\n    this.setLayout(opt_layout, coordinates, 0);\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = [];\n    }\n    this.flatCoordinates.length = deflateCoordinate(\n      this.flatCoordinates, 0, coordinates, this.stride);\n    this.changed();\n  };\n\n  return Point;\n}(SimpleGeometry));\n\n\nexport default Point;\n\n//# sourceMappingURL=Point.js.map","/**\n * @module ol/geom/flat/contains\n */\nimport {forEachCorner} from '../../extent.js';\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} Contains extent.\n */\nexport function linearRingContainsExtent(flatCoordinates, offset, end, stride, extent) {\n  var outside = forEachCorner(extent,\n    /**\n     * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n     * @return {boolean} Contains (x, y).\n     */\n    function(coordinate) {\n      return !linearRingContainsXY(flatCoordinates, offset, end, stride, coordinate[0], coordinate[1]);\n    });\n  return !outside;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingContainsXY(flatCoordinates, offset, end, stride, x, y) {\n  // http://geomalgorithms.com/a03-_inclusion.html\n  // Copyright 2000 softSurfer, 2012 Dan Sunday\n  // This code may be freely used and modified for any purpose\n  // providing that this copyright notice is included with it.\n  // SoftSurfer makes no warranty for this code, and cannot be held\n  // liable for any real or imagined damage resulting from its use.\n  // Users of this code must verify correctness for their application.\n  var wn = 0;\n  var x1 = flatCoordinates[end - stride];\n  var y1 = flatCoordinates[end - stride + 1];\n  for (; offset < end; offset += stride) {\n    var x2 = flatCoordinates[offset];\n    var y2 = flatCoordinates[offset + 1];\n    if (y1 <= y) {\n      if (y2 > y && ((x2 - x1) * (y - y1)) - ((x - x1) * (y2 - y1)) > 0) {\n        wn++;\n      }\n    } else if (y2 <= y && ((x2 - x1) * (y - y1)) - ((x - x1) * (y2 - y1)) < 0) {\n      wn--;\n    }\n    x1 = x2;\n    y1 = y2;\n  }\n  return wn !== 0;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingsContainsXY(flatCoordinates, offset, ends, stride, x, y) {\n  if (ends.length === 0) {\n    return false;\n  }\n  if (!linearRingContainsXY(flatCoordinates, offset, ends[0], stride, x, y)) {\n    return false;\n  }\n  for (var i = 1, ii = ends.length; i < ii; ++i) {\n    if (linearRingContainsXY(flatCoordinates, ends[i - 1], ends[i], stride, x, y)) {\n      return false;\n    }\n  }\n  return true;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingssContainsXY(flatCoordinates, offset, endss, stride, x, y) {\n  if (endss.length === 0) {\n    return false;\n  }\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    var ends = endss[i];\n    if (linearRingsContainsXY(flatCoordinates, offset, ends, stride, x, y)) {\n      return true;\n    }\n    offset = ends[ends.length - 1];\n  }\n  return false;\n}\n\n//# sourceMappingURL=contains.js.map","/**\n * @module ol/geom/flat/interiorpoint\n */\nimport {numberSafeCompareFunction} from '../../array.js';\nimport {linearRingsContainsXY} from './contains.js';\n\n\n/**\n * Calculates a point that is likely to lie in the interior of the linear rings.\n * Inspired by JTS's com.vividsolutions.jts.geom.Geometry#getInteriorPoint.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {Array<number>} flatCenters Flat centers.\n * @param {number} flatCentersOffset Flat center offset.\n * @param {Array<number>=} opt_dest Destination.\n * @return {Array<number>} Destination point as XYM coordinate, where M is the\n * length of the horizontal intersection that the point belongs to.\n */\nexport function getInteriorPointOfArray(flatCoordinates, offset,\n  ends, stride, flatCenters, flatCentersOffset, opt_dest) {\n  var i, ii, x, x1, x2, y1, y2;\n  var y = flatCenters[flatCentersOffset + 1];\n  /** @type {Array<number>} */\n  var intersections = [];\n  // Calculate intersections with the horizontal line\n  for (var r = 0, rr = ends.length; r < rr; ++r) {\n    var end = ends[r];\n    x1 = flatCoordinates[end - stride];\n    y1 = flatCoordinates[end - stride + 1];\n    for (i = offset; i < end; i += stride) {\n      x2 = flatCoordinates[i];\n      y2 = flatCoordinates[i + 1];\n      if ((y <= y1 && y2 <= y) || (y1 <= y && y <= y2)) {\n        x = (y - y1) / (y2 - y1) * (x2 - x1) + x1;\n        intersections.push(x);\n      }\n      x1 = x2;\n      y1 = y2;\n    }\n  }\n  // Find the longest segment of the horizontal line that has its center point\n  // inside the linear ring.\n  var pointX = NaN;\n  var maxSegmentLength = -Infinity;\n  intersections.sort(numberSafeCompareFunction);\n  x1 = intersections[0];\n  for (i = 1, ii = intersections.length; i < ii; ++i) {\n    x2 = intersections[i];\n    var segmentLength = Math.abs(x2 - x1);\n    if (segmentLength > maxSegmentLength) {\n      x = (x1 + x2) / 2;\n      if (linearRingsContainsXY(flatCoordinates, offset, ends, stride, x, y)) {\n        pointX = x;\n        maxSegmentLength = segmentLength;\n      }\n    }\n    x1 = x2;\n  }\n  if (isNaN(pointX)) {\n    // There is no horizontal line that has its center point inside the linear\n    // ring.  Use the center of the the linear ring's extent.\n    pointX = flatCenters[flatCentersOffset];\n  }\n  if (opt_dest) {\n    opt_dest.push(pointX, y, maxSegmentLength);\n    return opt_dest;\n  } else {\n    return [pointX, y, maxSegmentLength];\n  }\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {Array<number>} flatCenters Flat centers.\n * @return {Array<number>} Interior points as XYM coordinates, where M is the\n * length of the horizontal intersection that the point belongs to.\n */\nexport function getInteriorPointsOfMultiArray(flatCoordinates, offset, endss, stride, flatCenters) {\n  var interiorPoints = [];\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    var ends = endss[i];\n    interiorPoints = getInteriorPointOfArray(flatCoordinates,\n      offset, ends, stride, flatCenters, 2 * i, interiorPoints);\n    offset = ends[ends.length - 1];\n  }\n  return interiorPoints;\n}\n\n//# sourceMappingURL=interiorpoint.js.map","/**\n * @module ol/geom/flat/segments\n */\n\n\n/**\n * This function calls `callback` for each segment of the flat coordinates\n * array. If the callback returns a truthy value the function returns that\n * value immediately. Otherwise the function returns `false`.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {function(this: S, import(\"../../coordinate.js\").Coordinate, import(\"../../coordinate.js\").Coordinate): T} callback Function\n *     called for each segment.\n * @param {S=} opt_this The object to be used as the value of 'this'\n *     within callback.\n * @return {T|boolean} Value.\n * @template T,S\n */\nexport function forEach(flatCoordinates, offset, end, stride, callback, opt_this) {\n  var point1 = [flatCoordinates[offset], flatCoordinates[offset + 1]];\n  var point2 = [];\n  var ret;\n  for (; (offset + stride) < end; offset += stride) {\n    point2[0] = flatCoordinates[offset + stride];\n    point2[1] = flatCoordinates[offset + stride + 1];\n    ret = callback.call(opt_this, point1, point2);\n    if (ret) {\n      return ret;\n    }\n    point1[0] = point2[0];\n    point1[1] = point2[1];\n  }\n  return false;\n}\n\n//# sourceMappingURL=segments.js.map","/**\n * @module ol/geom/flat/intersectsextent\n */\nimport {containsExtent, createEmpty, extendFlatCoordinates, intersects, intersectsSegment} from '../../extent.js';\nimport {linearRingContainsXY, linearRingContainsExtent} from './contains.js';\nimport {forEach as forEachSegment} from './segments.js';\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLineString(flatCoordinates, offset, end, stride, extent) {\n  var coordinatesExtent = extendFlatCoordinates(\n    createEmpty(), flatCoordinates, offset, end, stride);\n  if (!intersects(extent, coordinatesExtent)) {\n    return false;\n  }\n  if (containsExtent(extent, coordinatesExtent)) {\n    return true;\n  }\n  if (coordinatesExtent[0] >= extent[0] &&\n      coordinatesExtent[2] <= extent[2]) {\n    return true;\n  }\n  if (coordinatesExtent[1] >= extent[1] &&\n      coordinatesExtent[3] <= extent[3]) {\n    return true;\n  }\n  return forEachSegment(flatCoordinates, offset, end, stride,\n    /**\n     * @param {import(\"../../coordinate.js\").Coordinate} point1 Start point.\n     * @param {import(\"../../coordinate.js\").Coordinate} point2 End point.\n     * @return {boolean} `true` if the segment and the extent intersect,\n     *     `false` otherwise.\n     */\n    function(point1, point2) {\n      return intersectsSegment(extent, point1, point2);\n    });\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLineStringArray(flatCoordinates, offset, ends, stride, extent) {\n  for (var i = 0, ii = ends.length; i < ii; ++i) {\n    if (intersectsLineString(\n      flatCoordinates, offset, ends[i], stride, extent)) {\n      return true;\n    }\n    offset = ends[i];\n  }\n  return false;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRing(flatCoordinates, offset, end, stride, extent) {\n  if (intersectsLineString(\n    flatCoordinates, offset, end, stride, extent)) {\n    return true;\n  }\n  if (linearRingContainsXY(flatCoordinates, offset, end, stride, extent[0], extent[1])) {\n    return true;\n  }\n  if (linearRingContainsXY(flatCoordinates, offset, end, stride, extent[0], extent[3])) {\n    return true;\n  }\n  if (linearRingContainsXY(flatCoordinates, offset, end, stride, extent[2], extent[1])) {\n    return true;\n  }\n  if (linearRingContainsXY(flatCoordinates, offset, end, stride, extent[2], extent[3])) {\n    return true;\n  }\n  return false;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRingArray(flatCoordinates, offset, ends, stride, extent) {\n  if (!intersectsLinearRing(\n    flatCoordinates, offset, ends[0], stride, extent)) {\n    return false;\n  }\n  if (ends.length === 1) {\n    return true;\n  }\n  for (var i = 1, ii = ends.length; i < ii; ++i) {\n    if (linearRingContainsExtent(flatCoordinates, ends[i - 1], ends[i], stride, extent)) {\n      if (!intersectsLineString(flatCoordinates, ends[i - 1], ends[i], stride, extent)) {\n        return false;\n      }\n    }\n  }\n  return true;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRingMultiArray(flatCoordinates, offset, endss, stride, extent) {\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    var ends = endss[i];\n    if (intersectsLinearRingArray(\n      flatCoordinates, offset, ends, stride, extent)) {\n      return true;\n    }\n    offset = ends[ends.length - 1];\n  }\n  return false;\n}\n\n//# sourceMappingURL=intersectsextent.js.map","/**\n * @module ol/geom/flat/reverse\n */\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n */\nexport function coordinates(flatCoordinates, offset, end, stride) {\n  while (offset < end - stride) {\n    for (var i = 0; i < stride; ++i) {\n      var tmp = flatCoordinates[offset + i];\n      flatCoordinates[offset + i] = flatCoordinates[end - stride + i];\n      flatCoordinates[end - stride + i] = tmp;\n    }\n    offset += stride;\n    end -= stride;\n  }\n}\n\n//# sourceMappingURL=reverse.js.map","/**\n * @module ol/geom/flat/orient\n */\nimport {coordinates as reverseCoordinates} from './reverse.js';\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {boolean} Is clockwise.\n */\nexport function linearRingIsClockwise(flatCoordinates, offset, end, stride) {\n  // http://tinyurl.com/clockwise-method\n  // https://github.com/OSGeo/gdal/blob/trunk/gdal/ogr/ogrlinearring.cpp\n  var edge = 0;\n  var x1 = flatCoordinates[end - stride];\n  var y1 = flatCoordinates[end - stride + 1];\n  for (; offset < end; offset += stride) {\n    var x2 = flatCoordinates[offset];\n    var y2 = flatCoordinates[offset + 1];\n    edge += (x2 - x1) * (y2 + y1);\n    x1 = x2;\n    y1 = y2;\n  }\n  return edge > 0;\n}\n\n\n/**\n * Determines if linear rings are oriented.  By default, left-hand orientation\n * is tested (first ring must be clockwise, remaining rings counter-clockwise).\n * To test for right-hand orientation, use the `opt_right` argument.\n *\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean=} opt_right Test for right-hand orientation\n *     (counter-clockwise exterior ring and clockwise interior rings).\n * @return {boolean} Rings are correctly oriented.\n */\nexport function linearRingIsOriented(flatCoordinates, offset, ends, stride, opt_right) {\n  var right = opt_right !== undefined ? opt_right : false;\n  for (var i = 0, ii = ends.length; i < ii; ++i) {\n    var end = ends[i];\n    var isClockwise = linearRingIsClockwise(\n      flatCoordinates, offset, end, stride);\n    if (i === 0) {\n      if ((right && isClockwise) || (!right && !isClockwise)) {\n        return false;\n      }\n    } else {\n      if ((right && !isClockwise) || (!right && isClockwise)) {\n        return false;\n      }\n    }\n    offset = end;\n  }\n  return true;\n}\n\n\n/**\n * Determines if linear rings are oriented.  By default, left-hand orientation\n * is tested (first ring must be clockwise, remaining rings counter-clockwise).\n * To test for right-hand orientation, use the `opt_right` argument.\n *\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Array of array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean=} opt_right Test for right-hand orientation\n *     (counter-clockwise exterior ring and clockwise interior rings).\n * @return {boolean} Rings are correctly oriented.\n */\nexport function linearRingsAreOriented(flatCoordinates, offset, endss, stride, opt_right) {\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    if (!linearRingIsOriented(\n      flatCoordinates, offset, endss[i], stride, opt_right)) {\n      return false;\n    }\n  }\n  return true;\n}\n\n\n/**\n * Orient coordinates in a flat array of linear rings.  By default, rings\n * are oriented following the left-hand rule (clockwise for exterior and\n * counter-clockwise for interior rings).  To orient according to the\n * right-hand rule, use the `opt_right` argument.\n *\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {boolean=} opt_right Follow the right-hand rule for orientation.\n * @return {number} End.\n */\nexport function orientLinearRings(flatCoordinates, offset, ends, stride, opt_right) {\n  var right = opt_right !== undefined ? opt_right : false;\n  for (var i = 0, ii = ends.length; i < ii; ++i) {\n    var end = ends[i];\n    var isClockwise = linearRingIsClockwise(\n      flatCoordinates, offset, end, stride);\n    var reverse = i === 0 ?\n      (right && isClockwise) || (!right && !isClockwise) :\n      (right && !isClockwise) || (!right && isClockwise);\n    if (reverse) {\n      reverseCoordinates(flatCoordinates, offset, end, stride);\n    }\n    offset = end;\n  }\n  return offset;\n}\n\n\n/**\n * Orient coordinates in a flat array of linear rings.  By default, rings\n * are oriented following the left-hand rule (clockwise for exterior and\n * counter-clockwise for interior rings).  To orient according to the\n * right-hand rule, use the `opt_right` argument.\n *\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Array of array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean=} opt_right Follow the right-hand rule for orientation.\n * @return {number} End.\n */\nexport function orientLinearRingsArray(flatCoordinates, offset, endss, stride, opt_right) {\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    offset = orientLinearRings(\n      flatCoordinates, offset, endss[i], stride, opt_right);\n  }\n  return offset;\n}\n\n//# sourceMappingURL=orient.js.map","/**\n * @module ol/geom/Polygon\n */\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY, getCenter} from '../extent.js';\nimport GeometryLayout from './GeometryLayout.js';\nimport GeometryType from './GeometryType.js';\nimport LinearRing from './LinearRing.js';\nimport Point from './Point.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {offset as sphereOffset} from '../sphere.js';\nimport {linearRings as linearRingsArea} from './flat/area.js';\nimport {assignClosestArrayPoint, arrayMaxSquaredDelta} from './flat/closest.js';\nimport {linearRingsContainsXY} from './flat/contains.js';\nimport {deflateCoordinatesArray} from './flat/deflate.js';\nimport {inflateCoordinatesArray} from './flat/inflate.js';\nimport {getInteriorPointOfArray} from './flat/interiorpoint.js';\nimport {intersectsLinearRingArray} from './flat/intersectsextent.js';\nimport {linearRingIsOriented, orientLinearRings} from './flat/orient.js';\nimport {quantizeArray} from './flat/simplify.js';\nimport {modulo} from '../math.js';\n\n/**\n * @classdesc\n * Polygon geometry.\n *\n * @api\n */\nvar Polygon = /*@__PURE__*/(function (SimpleGeometry) {\n  function Polygon(coordinates, opt_layout, opt_ends) {\n\n    SimpleGeometry.call(this);\n\n    /**\n     * @type {Array<number>}\n     * @private\n     */\n    this.ends_ = [];\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.flatInteriorPointRevision_ = -1;\n\n    /**\n     * @private\n     * @type {import(\"../coordinate.js\").Coordinate}\n     */\n    this.flatInteriorPoint_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDelta_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDeltaRevision_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.orientedRevision_ = -1;\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.orientedFlatCoordinates_ = null;\n\n    if (opt_layout !== undefined && opt_ends) {\n      this.setFlatCoordinates(opt_layout, /** @type {Array<number>} */ (coordinates));\n      this.ends_ = opt_ends;\n    } else {\n      this.setCoordinates(/** @type {Array<Array<import(\"../coordinate.js\").Coordinate>>} */ (coordinates), opt_layout);\n    }\n\n  }\n\n  if ( SimpleGeometry ) Polygon.__proto__ = SimpleGeometry;\n  Polygon.prototype = Object.create( SimpleGeometry && SimpleGeometry.prototype );\n  Polygon.prototype.constructor = Polygon;\n\n  /**\n   * Append the passed linear ring to this polygon.\n   * @param {LinearRing} linearRing Linear ring.\n   * @api\n   */\n  Polygon.prototype.appendLinearRing = function appendLinearRing (linearRing) {\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = linearRing.getFlatCoordinates().slice();\n    } else {\n      extend(this.flatCoordinates, linearRing.getFlatCoordinates());\n    }\n    this.ends_.push(this.flatCoordinates.length);\n    this.changed();\n  };\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!Polygon} Clone.\n   * @override\n   * @api\n   */\n  Polygon.prototype.clone = function clone () {\n    return new Polygon(this.flatCoordinates.slice(), this.layout, this.ends_.slice());\n  };\n\n  /**\n   * @inheritDoc\n   */\n  Polygon.prototype.closestPointXY = function closestPointXY (x, y, closestPoint, minSquaredDistance) {\n    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n      return minSquaredDistance;\n    }\n    if (this.maxDeltaRevision_ != this.getRevision()) {\n      this.maxDelta_ = Math.sqrt(arrayMaxSquaredDelta(\n        this.flatCoordinates, 0, this.ends_, this.stride, 0));\n      this.maxDeltaRevision_ = this.getRevision();\n    }\n    return assignClosestArrayPoint(\n      this.flatCoordinates, 0, this.ends_, this.stride,\n      this.maxDelta_, true, x, y, closestPoint, minSquaredDistance);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  Polygon.prototype.containsXY = function containsXY (x, y) {\n    return linearRingsContainsXY(this.getOrientedFlatCoordinates(), 0, this.ends_, this.stride, x, y);\n  };\n\n  /**\n   * Return the area of the polygon on projected plane.\n   * @return {number} Area (on projected plane).\n   * @api\n   */\n  Polygon.prototype.getArea = function getArea () {\n    return linearRingsArea(this.getOrientedFlatCoordinates(), 0, this.ends_, this.stride);\n  };\n\n  /**\n   * Get the coordinate array for this geometry.  This array has the structure\n   * of a GeoJSON coordinate array for polygons.\n   *\n   * @param {boolean=} opt_right Orient coordinates according to the right-hand\n   *     rule (counter-clockwise for exterior and clockwise for interior rings).\n   *     If `false`, coordinates will be oriented according to the left-hand rule\n   *     (clockwise for exterior and counter-clockwise for interior rings).\n   *     By default, coordinate orientation will depend on how the geometry was\n   *     constructed.\n   * @return {Array<Array<import(\"../coordinate.js\").Coordinate>>} Coordinates.\n   * @override\n   * @api\n   */\n  Polygon.prototype.getCoordinates = function getCoordinates (opt_right) {\n    var flatCoordinates;\n    if (opt_right !== undefined) {\n      flatCoordinates = this.getOrientedFlatCoordinates().slice();\n      orientLinearRings(\n        flatCoordinates, 0, this.ends_, this.stride, opt_right);\n    } else {\n      flatCoordinates = this.flatCoordinates;\n    }\n\n    return inflateCoordinatesArray(\n      flatCoordinates, 0, this.ends_, this.stride);\n  };\n\n  /**\n   * @return {Array<number>} Ends.\n   */\n  Polygon.prototype.getEnds = function getEnds () {\n    return this.ends_;\n  };\n\n  /**\n   * @return {Array<number>} Interior point.\n   */\n  Polygon.prototype.getFlatInteriorPoint = function getFlatInteriorPoint () {\n    if (this.flatInteriorPointRevision_ != this.getRevision()) {\n      var flatCenter = getCenter(this.getExtent());\n      this.flatInteriorPoint_ = getInteriorPointOfArray(\n        this.getOrientedFlatCoordinates(), 0, this.ends_, this.stride,\n        flatCenter, 0);\n      this.flatInteriorPointRevision_ = this.getRevision();\n    }\n    return this.flatInteriorPoint_;\n  };\n\n  /**\n   * Return an interior point of the polygon.\n   * @return {Point} Interior point as XYM coordinate, where M is the\n   * length of the horizontal intersection that the point belongs to.\n   * @api\n   */\n  Polygon.prototype.getInteriorPoint = function getInteriorPoint () {\n    return new Point(this.getFlatInteriorPoint(), GeometryLayout.XYM);\n  };\n\n  /**\n   * Return the number of rings of the polygon,  this includes the exterior\n   * ring and any interior rings.\n   *\n   * @return {number} Number of rings.\n   * @api\n   */\n  Polygon.prototype.getLinearRingCount = function getLinearRingCount () {\n    return this.ends_.length;\n  };\n\n  /**\n   * Return the Nth linear ring of the polygon geometry. Return `null` if the\n   * given index is out of range.\n   * The exterior linear ring is available at index `0` and the interior rings\n   * at index `1` and beyond.\n   *\n   * @param {number} index Index.\n   * @return {LinearRing} Linear ring.\n   * @api\n   */\n  Polygon.prototype.getLinearRing = function getLinearRing (index) {\n    if (index < 0 || this.ends_.length <= index) {\n      return null;\n    }\n    return new LinearRing(this.flatCoordinates.slice(\n      index === 0 ? 0 : this.ends_[index - 1], this.ends_[index]), this.layout);\n  };\n\n  /**\n   * Return the linear rings of the polygon.\n   * @return {Array<LinearRing>} Linear rings.\n   * @api\n   */\n  Polygon.prototype.getLinearRings = function getLinearRings () {\n    var layout = this.layout;\n    var flatCoordinates = this.flatCoordinates;\n    var ends = this.ends_;\n    var linearRings = [];\n    var offset = 0;\n    for (var i = 0, ii = ends.length; i < ii; ++i) {\n      var end = ends[i];\n      var linearRing = new LinearRing(flatCoordinates.slice(offset, end), layout);\n      linearRings.push(linearRing);\n      offset = end;\n    }\n    return linearRings;\n  };\n\n  /**\n   * @return {Array<number>} Oriented flat coordinates.\n   */\n  Polygon.prototype.getOrientedFlatCoordinates = function getOrientedFlatCoordinates () {\n    if (this.orientedRevision_ != this.getRevision()) {\n      var flatCoordinates = this.flatCoordinates;\n      if (linearRingIsOriented(\n        flatCoordinates, 0, this.ends_, this.stride)) {\n        this.orientedFlatCoordinates_ = flatCoordinates;\n      } else {\n        this.orientedFlatCoordinates_ = flatCoordinates.slice();\n        this.orientedFlatCoordinates_.length =\n            orientLinearRings(\n              this.orientedFlatCoordinates_, 0, this.ends_, this.stride);\n      }\n      this.orientedRevision_ = this.getRevision();\n    }\n    return this.orientedFlatCoordinates_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  Polygon.prototype.getSimplifiedGeometryInternal = function getSimplifiedGeometryInternal (squaredTolerance) {\n    var simplifiedFlatCoordinates = [];\n    var simplifiedEnds = [];\n    simplifiedFlatCoordinates.length = quantizeArray(\n      this.flatCoordinates, 0, this.ends_, this.stride,\n      Math.sqrt(squaredTolerance),\n      simplifiedFlatCoordinates, 0, simplifiedEnds);\n    return new Polygon(simplifiedFlatCoordinates, GeometryLayout.XY, simplifiedEnds);\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  Polygon.prototype.getType = function getType () {\n    return GeometryType.POLYGON;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  Polygon.prototype.intersectsExtent = function intersectsExtent (extent) {\n    return intersectsLinearRingArray(\n      this.getOrientedFlatCoordinates(), 0, this.ends_, this.stride, extent);\n  };\n\n  /**\n   * Set the coordinates of the polygon.\n   * @param {!Array<Array<import(\"../coordinate.js\").Coordinate>>} coordinates Coordinates.\n   * @param {GeometryLayout=} opt_layout Layout.\n   * @override\n   * @api\n   */\n  Polygon.prototype.setCoordinates = function setCoordinates (coordinates, opt_layout) {\n    this.setLayout(opt_layout, coordinates, 2);\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = [];\n    }\n    var ends = deflateCoordinatesArray(\n      this.flatCoordinates, 0, coordinates, this.stride, this.ends_);\n    this.flatCoordinates.length = ends.length === 0 ? 0 : ends[ends.length - 1];\n    this.changed();\n  };\n\n  return Polygon;\n}(SimpleGeometry));\n\n\nexport default Polygon;\n\n\n/**\n * Create an approximation of a circle on the surface of a sphere.\n * @param {import(\"../coordinate.js\").Coordinate} center Center (`[lon, lat]` in degrees).\n * @param {number} radius The great-circle distance from the center to\n *     the polygon vertices.\n * @param {number=} opt_n Optional number of vertices for the resulting\n *     polygon. Default is `32`.\n * @param {number=} opt_sphereRadius Optional radius for the sphere (defaults to\n *     the Earth's mean radius using the WGS84 ellipsoid).\n * @return {Polygon} The \"circular\" polygon.\n * @api\n */\nexport function circular(center, radius, opt_n, opt_sphereRadius) {\n  var n = opt_n ? opt_n : 32;\n  /** @type {Array<number>} */\n  var flatCoordinates = [];\n  for (var i = 0; i < n; ++i) {\n    extend(flatCoordinates, sphereOffset(center, radius, 2 * Math.PI * i / n, opt_sphereRadius));\n  }\n  flatCoordinates.push(flatCoordinates[0], flatCoordinates[1]);\n  return new Polygon(flatCoordinates, GeometryLayout.XY, [flatCoordinates.length]);\n}\n\n\n/**\n * Create a polygon from an extent. The layout used is `XY`.\n * @param {import(\"../extent.js\").Extent} extent The extent.\n * @return {Polygon} The polygon.\n * @api\n */\nexport function fromExtent(extent) {\n  var minX = extent[0];\n  var minY = extent[1];\n  var maxX = extent[2];\n  var maxY = extent[3];\n  var flatCoordinates =\n      [minX, minY, minX, maxY, maxX, maxY, maxX, minY, minX, minY];\n  return new Polygon(flatCoordinates, GeometryLayout.XY, [flatCoordinates.length]);\n}\n\n\n/**\n * Create a regular polygon from a circle.\n * @param {import(\"./Circle.js\").default} circle Circle geometry.\n * @param {number=} opt_sides Number of sides of the polygon. Default is 32.\n * @param {number=} opt_angle Start angle for the first vertex of the polygon in\n *     radians. Default is 0.\n * @return {Polygon} Polygon geometry.\n * @api\n */\nexport function fromCircle(circle, opt_sides, opt_angle) {\n  var sides = opt_sides ? opt_sides : 32;\n  var stride = circle.getStride();\n  var layout = circle.getLayout();\n  var center = circle.getCenter();\n  var arrayLength = stride * (sides + 1);\n  var flatCoordinates = new Array(arrayLength);\n  for (var i = 0; i < arrayLength; i += stride) {\n    flatCoordinates[i] = 0;\n    flatCoordinates[i + 1] = 0;\n    for (var j = 2; j < stride; j++) {\n      flatCoordinates[i + j] = center[j];\n    }\n  }\n  var ends = [flatCoordinates.length];\n  var polygon = new Polygon(flatCoordinates, layout, ends);\n  makeRegular(polygon, center, circle.getRadius(), opt_angle);\n  return polygon;\n}\n\n\n/**\n * Modify the coordinates of a polygon to make it a regular polygon.\n * @param {Polygon} polygon Polygon geometry.\n * @param {import(\"../coordinate.js\").Coordinate} center Center of the regular polygon.\n * @param {number} radius Radius of the regular polygon.\n * @param {number=} opt_angle Start angle for the first vertex of the polygon in\n *     radians. Default is 0.\n */\nexport function makeRegular(polygon, center, radius, opt_angle) {\n  var flatCoordinates = polygon.getFlatCoordinates();\n  var stride = polygon.getStride();\n  var sides = flatCoordinates.length / stride - 1;\n  var startAngle = opt_angle ? opt_angle : 0;\n  for (var i = 0; i <= sides; ++i) {\n    var offset = i * stride;\n    var angle = startAngle + (modulo(i, sides) * 2 * Math.PI / sides);\n    flatCoordinates[offset] = center[0] + (radius * Math.cos(angle));\n    flatCoordinates[offset + 1] = center[1] + (radius * Math.sin(angle));\n  }\n  polygon.changed();\n}\n\n//# sourceMappingURL=Polygon.js.map","/**\n * @module ol/View\n */\nimport {DEFAULT_TILE_SIZE} from './tilegrid/common.js';\nimport {getUid} from './util.js';\nimport {VOID} from './functions.js';\nimport {createExtent, none as centerNone} from './centerconstraint.js';\nimport BaseObject from './Object.js';\nimport {createSnapToResolutions, createSnapToPower} from './resolutionconstraint.js';\nimport {createSnapToZero, createSnapToN, none as rotationNone, disable} from './rotationconstraint.js';\nimport ViewHint from './ViewHint.js';\nimport ViewProperty from './ViewProperty.js';\nimport {linearFindNearest} from './array.js';\nimport {assert} from './asserts.js';\nimport {add as addCoordinate, rotate as rotateCoordinate, equals as coordinatesEqual} from './coordinate.js';\nimport {inAndOut} from './easing.js';\nimport {getForViewAndSize, getCenter, getHeight, getWidth, isEmpty} from './extent.js';\nimport GeometryType from './geom/GeometryType.js';\nimport {fromExtent as polygonFromExtent} from './geom/Polygon.js';\nimport {clamp, modulo} from './math.js';\nimport {assign} from './obj.js';\nimport {createProjection, METERS_PER_UNIT} from './proj.js';\nimport Units from './proj/Units.js';\n\n\n/**\n * An animation configuration\n *\n * @typedef {Object} Animation\n * @property {import(\"./coordinate.js\").Coordinate} [sourceCenter]\n * @property {import(\"./coordinate.js\").Coordinate} [targetCenter]\n * @property {number} [sourceResolution]\n * @property {number} [targetResolution]\n * @property {number} [sourceRotation]\n * @property {number} [targetRotation]\n * @property {import(\"./coordinate.js\").Coordinate} [anchor]\n * @property {number} start\n * @property {number} duration\n * @property {boolean} complete\n * @property {function(number):number} easing\n * @property {function(boolean)} callback\n */\n\n\n/**\n * @typedef {Object} Constraints\n * @property {import(\"./centerconstraint.js\").Type} center\n * @property {import(\"./resolutionconstraint.js\").Type} resolution\n * @property {import(\"./rotationconstraint.js\").Type} rotation\n */\n\n\n/**\n * @typedef {Object} FitOptions\n * @property {import(\"./size.js\").Size} [size] The size in pixels of the box to fit\n * the extent into. Default is the current size of the first map in the DOM that\n * uses this view, or `[100, 100]` if no such map is found.\n * @property {!Array<number>} [padding=[0, 0, 0, 0]] Padding (in pixels) to be\n * cleared inside the view. Values in the array are top, right, bottom and left\n * padding.\n * @property {boolean} [constrainResolution=true] Constrain the resolution.\n * @property {boolean} [nearest=false] If `constrainResolution` is `true`, get\n * the nearest extent instead of the closest that actually fits the view.\n * @property {number} [minResolution=0] Minimum resolution that we zoom to.\n * @property {number} [maxZoom] Maximum zoom level that we zoom to. If\n * `minResolution` is given, this property is ignored.\n * @property {number} [duration] The duration of the animation in milliseconds.\n * By default, there is no animation to the target extent.\n * @property {function(number):number} [easing] The easing function used during\n * the animation (defaults to {@link module:ol/easing~inAndOut}).\n * The function will be called for each frame with a number representing a\n * fraction of the animation's duration.  The function should return a number\n * between 0 and 1 representing the progress toward the destination state.\n * @property {function(boolean)} [callback] Function called when the view is in\n * its final position. The callback will be called with `true` if the animation\n * series completed on its own or `false` if it was cancelled.\n */\n\n\n/**\n * @typedef {Object} ViewOptions\n * @property {import(\"./coordinate.js\").Coordinate} [center] The initial center for\n * the view. The coordinate system for the center is specified with the\n * `projection` option. Layer sources will not be fetched if this is not set,\n * but the center can be set later with {@link #setCenter}.\n * @property {boolean|number} [constrainRotation=true] Rotation constraint.\n * `false` means no constraint. `true` means no constraint, but snap to zero\n * near zero. A number constrains the rotation to that number of values. For\n * example, `4` will constrain the rotation to 0, 90, 180, and 270 degrees.\n * @property {boolean} [enableRotation=true] Enable rotation.\n * If `false`, a rotation constraint that always sets the rotation to zero is\n * used. The `constrainRotation` option has no effect if `enableRotation` is\n * `false`.\n * @property {import(\"./extent.js\").Extent} [extent] The extent that constrains the\n * center, in other words, center cannot be set outside this extent.\n * @property {number} [maxResolution] The maximum resolution used to determine\n * the resolution constraint. It is used together with `minResolution` (or\n * `maxZoom`) and `zoomFactor`. If unspecified it is calculated in such a way\n * that the projection's validity extent fits in a 256x256 px tile. If the\n * projection is Spherical Mercator (the default) then `maxResolution` defaults\n * to `40075016.68557849 / 256 = 156543.03392804097`.\n * @property {number} [minResolution] The minimum resolution used to determine\n * the resolution constraint.  It is used together with `maxResolution` (or\n * `minZoom`) and `zoomFactor`.  If unspecified it is calculated assuming 29\n * zoom levels (with a factor of 2). If the projection is Spherical Mercator\n * (the default) then `minResolution` defaults to\n * `40075016.68557849 / 256 / Math.pow(2, 28) = 0.0005831682455839253`.\n * @property {number} [maxZoom=28] The maximum zoom level used to determine the\n * resolution constraint. It is used together with `minZoom` (or\n * `maxResolution`) and `zoomFactor`.  Note that if `minResolution` is also\n * provided, it is given precedence over `maxZoom`.\n * @property {number} [minZoom=0] The minimum zoom level used to determine the\n * resolution constraint. It is used together with `maxZoom` (or\n * `minResolution`) and `zoomFactor`.  Note that if `maxResolution` is also\n * provided, it is given precedence over `minZoom`.\n * @property {import(\"./proj.js\").ProjectionLike} [projection='EPSG:3857'] The\n * projection. The default is Spherical Mercator.\n * @property {number} [resolution] The initial resolution for the view. The\n * units are `projection` units per pixel (e.g. meters per pixel). An\n * alternative to setting this is to set `zoom`. Layer sources will not be\n * fetched if neither this nor `zoom` are defined, but they can be set later\n * with {@link #setZoom} or {@link #setResolution}.\n * @property {Array<number>} [resolutions] Resolutions to determine the\n * resolution constraint. If set the `maxResolution`, `minResolution`,\n * `minZoom`, `maxZoom`, and `zoomFactor` options are ignored.\n * @property {number} [rotation=0] The initial rotation for the view in radians\n * (positive rotation clockwise, 0 means North).\n * @property {number} [zoom] Only used if `resolution` is not defined. Zoom\n * level used to calculate the initial resolution for the view. The initial\n * resolution is determined using the {@link #constrainResolution} method.\n * @property {number} [zoomFactor=2] The zoom factor used to determine the\n * resolution constraint.\n */\n\n\n/**\n * @typedef {Object} AnimationOptions\n * @property {import(\"./coordinate.js\").Coordinate} [center] The center of the view at the end of\n * the animation.\n * @property {number} [zoom] The zoom level of the view at the end of the\n * animation. This takes precedence over `resolution`.\n * @property {number} [resolution] The resolution of the view at the end\n * of the animation.  If `zoom` is also provided, this option will be ignored.\n * @property {number} [rotation] The rotation of the view at the end of\n * the animation.\n * @property {import(\"./coordinate.js\").Coordinate} [anchor] Optional anchor to remained fixed\n * during a rotation or resolution animation.\n * @property {number} [duration=1000] The duration of the animation in milliseconds.\n * @property {function(number):number} [easing] The easing function used\n * during the animation (defaults to {@link module:ol/easing~inAndOut}).\n * The function will be called for each frame with a number representing a\n * fraction of the animation's duration.  The function should return a number\n * between 0 and 1 representing the progress toward the destination state.\n */\n\n\n/**\n * @typedef {Object} State\n * @property {import(\"./coordinate.js\").Coordinate} center\n * @property {import(\"./proj/Projection.js\").default} projection\n * @property {number} resolution\n * @property {number} rotation\n * @property {number} zoom\n */\n\n\n/**\n * Default min zoom level for the map view.\n * @type {number}\n */\nvar DEFAULT_MIN_ZOOM = 0;\n\n\n/**\n * @classdesc\n * A View object represents a simple 2D view of the map.\n *\n * This is the object to act upon to change the center, resolution,\n * and rotation of the map.\n *\n * ### The view states\n *\n * An View is determined by three states: `center`, `resolution`,\n * and `rotation`. Each state has a corresponding getter and setter, e.g.\n * `getCenter` and `setCenter` for the `center` state.\n *\n * An View has a `projection`. The projection determines the\n * coordinate system of the center, and its units determine the units of the\n * resolution (projection units per pixel). The default projection is\n * Spherical Mercator (EPSG:3857).\n *\n * ### The constraints\n *\n * `setCenter`, `setResolution` and `setRotation` can be used to change the\n * states of the view. Any value can be passed to the setters. And the value\n * that is passed to a setter will effectively be the value set in the view,\n * and returned by the corresponding getter.\n *\n * But a View object also has a *resolution constraint*, a\n * *rotation constraint* and a *center constraint*.\n *\n * As said above, no constraints are applied when the setters are used to set\n * new states for the view. Applying constraints is done explicitly through\n * the use of the `constrain*` functions (`constrainResolution` and\n * `constrainRotation` and `constrainCenter`).\n *\n * The main users of the constraints are the interactions and the\n * controls. For example, double-clicking on the map changes the view to\n * the \"next\" resolution. And releasing the fingers after pinch-zooming\n * snaps to the closest resolution (with an animation).\n *\n * The *resolution constraint* snaps to specific resolutions. It is\n * determined by the following options: `resolutions`, `maxResolution`,\n * `maxZoom`, and `zoomFactor`. If `resolutions` is set, the other three\n * options are ignored. See documentation for each option for more\n * information.\n *\n * The *rotation constraint* snaps to specific angles. It is determined\n * by the following options: `enableRotation` and `constrainRotation`.\n * By default the rotation value is snapped to zero when approaching the\n * horizontal.\n *\n * The *center constraint* is determined by the `extent` option. By\n * default the center is not constrained at all.\n *\n  * @api\n */\nvar View = /*@__PURE__*/(function (BaseObject) {\n  function View(opt_options) {\n    BaseObject.call(this);\n\n    var options = assign({}, opt_options);\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.hints_ = [0, 0];\n\n    /**\n     * @private\n     * @type {Array<Array<Animation>>}\n     */\n    this.animations_ = [];\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.updateAnimationKey_;\n\n    this.updateAnimations_ = this.updateAnimations_.bind(this);\n\n    /**\n     * @private\n     * @const\n     * @type {import(\"./proj/Projection.js\").default}\n     */\n    this.projection_ = createProjection(options.projection, 'EPSG:3857');\n\n    this.applyOptions_(options);\n  }\n\n  if ( BaseObject ) View.__proto__ = BaseObject;\n  View.prototype = Object.create( BaseObject && BaseObject.prototype );\n  View.prototype.constructor = View;\n\n  /**\n   * Set up the view with the given options.\n   * @param {ViewOptions} options View options.\n   */\n  View.prototype.applyOptions_ = function applyOptions_ (options) {\n\n    /**\n     * @type {Object<string, *>}\n     */\n    var properties = {};\n    properties[ViewProperty.CENTER] = options.center !== undefined ?\n      options.center : null;\n\n    var resolutionConstraintInfo = createResolutionConstraint(options);\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxResolution_ = resolutionConstraintInfo.maxResolution;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.minResolution_ = resolutionConstraintInfo.minResolution;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.zoomFactor_ = resolutionConstraintInfo.zoomFactor;\n\n    /**\n     * @private\n     * @type {Array<number>|undefined}\n     */\n    this.resolutions_ = options.resolutions;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.minZoom_ = resolutionConstraintInfo.minZoom;\n\n    var centerConstraint = createCenterConstraint(options);\n    var resolutionConstraint = resolutionConstraintInfo.constraint;\n    var rotationConstraint = createRotationConstraint(options);\n\n    /**\n     * @private\n     * @type {Constraints}\n     */\n    this.constraints_ = {\n      center: centerConstraint,\n      resolution: resolutionConstraint,\n      rotation: rotationConstraint\n    };\n\n    if (options.resolution !== undefined) {\n      properties[ViewProperty.RESOLUTION] = options.resolution;\n    } else if (options.zoom !== undefined) {\n      properties[ViewProperty.RESOLUTION] = this.constrainResolution(\n        this.maxResolution_, options.zoom - this.minZoom_);\n\n      if (this.resolutions_) { // in case map zoom is out of min/max zoom range\n        properties[ViewProperty.RESOLUTION] = clamp(\n          Number(this.getResolution() || properties[ViewProperty.RESOLUTION]),\n          this.minResolution_, this.maxResolution_);\n      }\n    }\n    properties[ViewProperty.ROTATION] = options.rotation !== undefined ? options.rotation : 0;\n    this.setProperties(properties);\n\n    /**\n     * @private\n     * @type {ViewOptions}\n     */\n    this.options_ = options;\n\n  };\n\n  /**\n   * Get an updated version of the view options used to construct the view.  The\n   * current resolution (or zoom), center, and rotation are applied to any stored\n   * options.  The provided options can be used to apply new min/max zoom or\n   * resolution limits.\n   * @param {ViewOptions} newOptions New options to be applied.\n   * @return {ViewOptions} New options updated with the current view state.\n   */\n  View.prototype.getUpdatedOptions_ = function getUpdatedOptions_ (newOptions) {\n    var options = assign({}, this.options_);\n\n    // preserve resolution (or zoom)\n    if (options.resolution !== undefined) {\n      options.resolution = this.getResolution();\n    } else {\n      options.zoom = this.getZoom();\n    }\n\n    // preserve center\n    options.center = this.getCenter();\n\n    // preserve rotation\n    options.rotation = this.getRotation();\n\n    return assign({}, options, newOptions);\n  };\n\n  /**\n   * Animate the view.  The view's center, zoom (or resolution), and rotation\n   * can be animated for smooth transitions between view states.  For example,\n   * to animate the view to a new zoom level:\n   *\n   *     view.animate({zoom: view.getZoom() + 1});\n   *\n   * By default, the animation lasts one second and uses in-and-out easing.  You\n   * can customize this behavior by including `duration` (in milliseconds) and\n   * `easing` options (see {@link module:ol/easing}).\n   *\n   * To chain together multiple animations, call the method with multiple\n   * animation objects.  For example, to first zoom and then pan:\n   *\n   *     view.animate({zoom: 10}, {center: [0, 0]});\n   *\n   * If you provide a function as the last argument to the animate method, it\n   * will get called at the end of an animation series.  The callback will be\n   * called with `true` if the animation series completed on its own or `false`\n   * if it was cancelled.\n   *\n   * Animations are cancelled by user interactions (e.g. dragging the map) or by\n   * calling `view.setCenter()`, `view.setResolution()`, or `view.setRotation()`\n   * (or another method that calls one of these).\n   *\n   * @param {...(AnimationOptions|function(boolean))} var_args Animation\n   *     options.  Multiple animations can be run in series by passing multiple\n   *     options objects.  To run multiple animations in parallel, call the method\n   *     multiple times.  An optional callback can be provided as a final\n   *     argument.  The callback will be called with a boolean indicating whether\n   *     the animation completed without being cancelled.\n   * @api\n   */\n  View.prototype.animate = function animate (var_args) {\n    var arguments$1 = arguments;\n\n    var animationCount = arguments.length;\n    var callback;\n    if (animationCount > 1 && typeof arguments[animationCount - 1] === 'function') {\n      callback = arguments[animationCount - 1];\n      --animationCount;\n    }\n    if (!this.isDef()) {\n      // if view properties are not yet set, shortcut to the final state\n      var state = arguments[animationCount - 1];\n      if (state.center) {\n        this.setCenter(state.center);\n      }\n      if (state.zoom !== undefined) {\n        this.setZoom(state.zoom);\n      }\n      if (state.rotation !== undefined) {\n        this.setRotation(state.rotation);\n      }\n      if (callback) {\n        animationCallback(callback, true);\n      }\n      return;\n    }\n    var start = Date.now();\n    var center = this.getCenter().slice();\n    var resolution = this.getResolution();\n    var rotation = this.getRotation();\n    var series = [];\n    for (var i = 0; i < animationCount; ++i) {\n      var options = /** @type {AnimationOptions} */ (arguments$1[i]);\n\n      var animation = /** @type {Animation} */ ({\n        start: start,\n        complete: false,\n        anchor: options.anchor,\n        duration: options.duration !== undefined ? options.duration : 1000,\n        easing: options.easing || inAndOut\n      });\n\n      if (options.center) {\n        animation.sourceCenter = center;\n        animation.targetCenter = options.center;\n        center = animation.targetCenter;\n      }\n\n      if (options.zoom !== undefined) {\n        animation.sourceResolution = resolution;\n        animation.targetResolution = this.constrainResolution(\n          this.maxResolution_, options.zoom - this.minZoom_, 0);\n        resolution = animation.targetResolution;\n      } else if (options.resolution) {\n        animation.sourceResolution = resolution;\n        animation.targetResolution = options.resolution;\n        resolution = animation.targetResolution;\n      }\n\n      if (options.rotation !== undefined) {\n        animation.sourceRotation = rotation;\n        var delta = modulo(options.rotation - rotation + Math.PI, 2 * Math.PI) - Math.PI;\n        animation.targetRotation = rotation + delta;\n        rotation = animation.targetRotation;\n      }\n\n      animation.callback = callback;\n\n      // check if animation is a no-op\n      if (isNoopAnimation(animation)) {\n        animation.complete = true;\n        // we still push it onto the series for callback handling\n      } else {\n        start += animation.duration;\n      }\n      series.push(animation);\n    }\n    this.animations_.push(series);\n    this.setHint(ViewHint.ANIMATING, 1);\n    this.updateAnimations_();\n  };\n\n  /**\n   * Determine if the view is being animated.\n   * @return {boolean} The view is being animated.\n   * @api\n   */\n  View.prototype.getAnimating = function getAnimating () {\n    return this.hints_[ViewHint.ANIMATING] > 0;\n  };\n\n  /**\n   * Determine if the user is interacting with the view, such as panning or zooming.\n   * @return {boolean} The view is being interacted with.\n   * @api\n   */\n  View.prototype.getInteracting = function getInteracting () {\n    return this.hints_[ViewHint.INTERACTING] > 0;\n  };\n\n  /**\n   * Cancel any ongoing animations.\n   * @api\n   */\n  View.prototype.cancelAnimations = function cancelAnimations () {\n    this.setHint(ViewHint.ANIMATING, -this.hints_[ViewHint.ANIMATING]);\n    for (var i = 0, ii = this.animations_.length; i < ii; ++i) {\n      var series = this.animations_[i];\n      if (series[0].callback) {\n        animationCallback(series[0].callback, false);\n      }\n    }\n    this.animations_.length = 0;\n  };\n\n  /**\n   * Update all animations.\n   */\n  View.prototype.updateAnimations_ = function updateAnimations_ () {\n    if (this.updateAnimationKey_ !== undefined) {\n      cancelAnimationFrame(this.updateAnimationKey_);\n      this.updateAnimationKey_ = undefined;\n    }\n    if (!this.getAnimating()) {\n      return;\n    }\n    var now = Date.now();\n    var more = false;\n    for (var i = this.animations_.length - 1; i >= 0; --i) {\n      var series = this.animations_[i];\n      var seriesComplete = true;\n      for (var j = 0, jj = series.length; j < jj; ++j) {\n        var animation = series[j];\n        if (animation.complete) {\n          continue;\n        }\n        var elapsed = now - animation.start;\n        var fraction = animation.duration > 0 ? elapsed / animation.duration : 1;\n        if (fraction >= 1) {\n          animation.complete = true;\n          fraction = 1;\n        } else {\n          seriesComplete = false;\n        }\n        var progress = animation.easing(fraction);\n        if (animation.sourceCenter) {\n          var x0 = animation.sourceCenter[0];\n          var y0 = animation.sourceCenter[1];\n          var x1 = animation.targetCenter[0];\n          var y1 = animation.targetCenter[1];\n          var x = x0 + progress * (x1 - x0);\n          var y = y0 + progress * (y1 - y0);\n          this.set(ViewProperty.CENTER, [x, y]);\n        }\n        if (animation.sourceResolution && animation.targetResolution) {\n          var resolution = progress === 1 ?\n            animation.targetResolution :\n            animation.sourceResolution + progress * (animation.targetResolution - animation.sourceResolution);\n          if (animation.anchor) {\n            this.set(ViewProperty.CENTER,\n              this.calculateCenterZoom(resolution, animation.anchor));\n          }\n          this.set(ViewProperty.RESOLUTION, resolution);\n        }\n        if (animation.sourceRotation !== undefined && animation.targetRotation !== undefined) {\n          var rotation = progress === 1 ?\n            modulo(animation.targetRotation + Math.PI, 2 * Math.PI) - Math.PI :\n            animation.sourceRotation + progress * (animation.targetRotation - animation.sourceRotation);\n          if (animation.anchor) {\n            this.set(ViewProperty.CENTER,\n              this.calculateCenterRotate(rotation, animation.anchor));\n          }\n          this.set(ViewProperty.ROTATION, rotation);\n        }\n        more = true;\n        if (!animation.complete) {\n          break;\n        }\n      }\n      if (seriesComplete) {\n        this.animations_[i] = null;\n        this.setHint(ViewHint.ANIMATING, -1);\n        var callback = series[0].callback;\n        if (callback) {\n          animationCallback(callback, true);\n        }\n      }\n    }\n    // prune completed series\n    this.animations_ = this.animations_.filter(Boolean);\n    if (more && this.updateAnimationKey_ === undefined) {\n      this.updateAnimationKey_ = requestAnimationFrame(this.updateAnimations_);\n    }\n  };\n\n  /**\n   * @param {number} rotation Target rotation.\n   * @param {import(\"./coordinate.js\").Coordinate} anchor Rotation anchor.\n   * @return {import(\"./coordinate.js\").Coordinate|undefined} Center for rotation and anchor.\n   */\n  View.prototype.calculateCenterRotate = function calculateCenterRotate (rotation, anchor) {\n    var center;\n    var currentCenter = this.getCenter();\n    if (currentCenter !== undefined) {\n      center = [currentCenter[0] - anchor[0], currentCenter[1] - anchor[1]];\n      rotateCoordinate(center, rotation - this.getRotation());\n      addCoordinate(center, anchor);\n    }\n    return center;\n  };\n\n  /**\n   * @param {number} resolution Target resolution.\n   * @param {import(\"./coordinate.js\").Coordinate} anchor Zoom anchor.\n   * @return {import(\"./coordinate.js\").Coordinate|undefined} Center for resolution and anchor.\n   */\n  View.prototype.calculateCenterZoom = function calculateCenterZoom (resolution, anchor) {\n    var center;\n    var currentCenter = this.getCenter();\n    var currentResolution = this.getResolution();\n    if (currentCenter !== undefined && currentResolution !== undefined) {\n      var x = anchor[0] - resolution * (anchor[0] - currentCenter[0]) / currentResolution;\n      var y = anchor[1] - resolution * (anchor[1] - currentCenter[1]) / currentResolution;\n      center = [x, y];\n    }\n    return center;\n  };\n\n  /**\n   * @private\n   * @return {import(\"./size.js\").Size} Viewport size or `[100, 100]` when no viewport is found.\n   */\n  View.prototype.getSizeFromViewport_ = function getSizeFromViewport_ () {\n    var size = [100, 100];\n    var selector = '.ol-viewport[data-view=\"' + getUid(this) + '\"]';\n    var element = document.querySelector(selector);\n    if (element) {\n      var metrics = getComputedStyle(element);\n      size[0] = parseInt(metrics.width, 10);\n      size[1] = parseInt(metrics.height, 10);\n    }\n    return size;\n  };\n\n  /**\n   * Get the constrained center of this view.\n   * @param {import(\"./coordinate.js\").Coordinate|undefined} center Center.\n   * @return {import(\"./coordinate.js\").Coordinate|undefined} Constrained center.\n   * @api\n   */\n  View.prototype.constrainCenter = function constrainCenter (center) {\n    return this.constraints_.center(center);\n  };\n\n  /**\n   * Get the constrained resolution of this view.\n   * @param {number|undefined} resolution Resolution.\n   * @param {number=} opt_delta Delta. Default is `0`.\n   * @param {number=} opt_direction Direction. Default is `0`.\n   * @return {number|undefined} Constrained resolution.\n   * @api\n   */\n  View.prototype.constrainResolution = function constrainResolution (resolution, opt_delta, opt_direction) {\n    var delta = opt_delta || 0;\n    var direction = opt_direction || 0;\n    return this.constraints_.resolution(resolution, delta, direction);\n  };\n\n  /**\n   * Get the constrained rotation of this view.\n   * @param {number|undefined} rotation Rotation.\n   * @param {number=} opt_delta Delta. Default is `0`.\n   * @return {number|undefined} Constrained rotation.\n   * @api\n   */\n  View.prototype.constrainRotation = function constrainRotation (rotation, opt_delta) {\n    var delta = opt_delta || 0;\n    return this.constraints_.rotation(rotation, delta);\n  };\n\n  /**\n   * Get the view center.\n   * @return {import(\"./coordinate.js\").Coordinate|undefined} The center of the view.\n   * @observable\n   * @api\n   */\n  View.prototype.getCenter = function getCenter () {\n    return (\n      /** @type {import(\"./coordinate.js\").Coordinate|undefined} */ (this.get(ViewProperty.CENTER))\n    );\n  };\n\n  /**\n   * @return {Constraints} Constraints.\n   */\n  View.prototype.getConstraints = function getConstraints () {\n    return this.constraints_;\n  };\n\n  /**\n   * @param {Array<number>=} opt_hints Destination array.\n   * @return {Array<number>} Hint.\n   */\n  View.prototype.getHints = function getHints (opt_hints) {\n    if (opt_hints !== undefined) {\n      opt_hints[0] = this.hints_[0];\n      opt_hints[1] = this.hints_[1];\n      return opt_hints;\n    } else {\n      return this.hints_.slice();\n    }\n  };\n\n  /**\n   * Calculate the extent for the current view state and the passed size.\n   * The size is the pixel dimensions of the box into which the calculated extent\n   * should fit. In most cases you want to get the extent of the entire map,\n   * that is `map.getSize()`.\n   * @param {import(\"./size.js\").Size=} opt_size Box pixel size. If not provided, the size of the\n   * first map that uses this view will be used.\n   * @return {import(\"./extent.js\").Extent} Extent.\n   * @api\n   */\n  View.prototype.calculateExtent = function calculateExtent (opt_size) {\n    var size = opt_size || this.getSizeFromViewport_();\n    var center = /** @type {!import(\"./coordinate.js\").Coordinate} */ (this.getCenter());\n    assert(center, 1); // The view center is not defined\n    var resolution = /** @type {!number} */ (this.getResolution());\n    assert(resolution !== undefined, 2); // The view resolution is not defined\n    var rotation = /** @type {!number} */ (this.getRotation());\n    assert(rotation !== undefined, 3); // The view rotation is not defined\n\n    return getForViewAndSize(center, resolution, rotation, size);\n  };\n\n  /**\n   * Get the maximum resolution of the view.\n   * @return {number} The maximum resolution of the view.\n   * @api\n   */\n  View.prototype.getMaxResolution = function getMaxResolution () {\n    return this.maxResolution_;\n  };\n\n  /**\n   * Get the minimum resolution of the view.\n   * @return {number} The minimum resolution of the view.\n   * @api\n   */\n  View.prototype.getMinResolution = function getMinResolution () {\n    return this.minResolution_;\n  };\n\n  /**\n   * Get the maximum zoom level for the view.\n   * @return {number} The maximum zoom level.\n   * @api\n   */\n  View.prototype.getMaxZoom = function getMaxZoom () {\n    return /** @type {number} */ (this.getZoomForResolution(this.minResolution_));\n  };\n\n  /**\n   * Set a new maximum zoom level for the view.\n   * @param {number} zoom The maximum zoom level.\n   * @api\n   */\n  View.prototype.setMaxZoom = function setMaxZoom (zoom) {\n    this.applyOptions_(this.getUpdatedOptions_({maxZoom: zoom}));\n  };\n\n  /**\n   * Get the minimum zoom level for the view.\n   * @return {number} The minimum zoom level.\n   * @api\n   */\n  View.prototype.getMinZoom = function getMinZoom () {\n    return /** @type {number} */ (this.getZoomForResolution(this.maxResolution_));\n  };\n\n  /**\n   * Set a new minimum zoom level for the view.\n   * @param {number} zoom The minimum zoom level.\n   * @api\n   */\n  View.prototype.setMinZoom = function setMinZoom (zoom) {\n    this.applyOptions_(this.getUpdatedOptions_({minZoom: zoom}));\n  };\n\n  /**\n   * Get the view projection.\n   * @return {import(\"./proj/Projection.js\").default} The projection of the view.\n   * @api\n   */\n  View.prototype.getProjection = function getProjection () {\n    return this.projection_;\n  };\n\n  /**\n   * Get the view resolution.\n   * @return {number|undefined} The resolution of the view.\n   * @observable\n   * @api\n   */\n  View.prototype.getResolution = function getResolution () {\n    return /** @type {number|undefined} */ (this.get(ViewProperty.RESOLUTION));\n  };\n\n  /**\n   * Get the resolutions for the view. This returns the array of resolutions\n   * passed to the constructor of the View, or undefined if none were given.\n   * @return {Array<number>|undefined} The resolutions of the view.\n   * @api\n   */\n  View.prototype.getResolutions = function getResolutions () {\n    return this.resolutions_;\n  };\n\n  /**\n   * Get the resolution for a provided extent (in map units) and size (in pixels).\n   * @param {import(\"./extent.js\").Extent} extent Extent.\n   * @param {import(\"./size.js\").Size=} opt_size Box pixel size.\n   * @return {number} The resolution at which the provided extent will render at\n   *     the given size.\n   * @api\n   */\n  View.prototype.getResolutionForExtent = function getResolutionForExtent (extent, opt_size) {\n    var size = opt_size || this.getSizeFromViewport_();\n    var xResolution = getWidth(extent) / size[0];\n    var yResolution = getHeight(extent) / size[1];\n    return Math.max(xResolution, yResolution);\n  };\n\n  /**\n   * Return a function that returns a value between 0 and 1 for a\n   * resolution. Exponential scaling is assumed.\n   * @param {number=} opt_power Power.\n   * @return {function(number): number} Resolution for value function.\n   */\n  View.prototype.getResolutionForValueFunction = function getResolutionForValueFunction (opt_power) {\n    var power = opt_power || 2;\n    var maxResolution = this.maxResolution_;\n    var minResolution = this.minResolution_;\n    var max = Math.log(maxResolution / minResolution) / Math.log(power);\n    return (\n      /**\n       * @param {number} value Value.\n       * @return {number} Resolution.\n       */\n      function(value) {\n        var resolution = maxResolution / Math.pow(power, value * max);\n        return resolution;\n      });\n  };\n\n  /**\n   * Get the view rotation.\n   * @return {number} The rotation of the view in radians.\n   * @observable\n   * @api\n   */\n  View.prototype.getRotation = function getRotation () {\n    return /** @type {number} */ (this.get(ViewProperty.ROTATION));\n  };\n\n  /**\n   * Return a function that returns a resolution for a value between\n   * 0 and 1. Exponential scaling is assumed.\n   * @param {number=} opt_power Power.\n   * @return {function(number): number} Value for resolution function.\n   */\n  View.prototype.getValueForResolutionFunction = function getValueForResolutionFunction (opt_power) {\n    var power = opt_power || 2;\n    var maxResolution = this.maxResolution_;\n    var minResolution = this.minResolution_;\n    var max = Math.log(maxResolution / minResolution) / Math.log(power);\n    return (\n      /**\n       * @param {number} resolution Resolution.\n       * @return {number} Value.\n       */\n      function(resolution) {\n        var value = (Math.log(maxResolution / resolution) / Math.log(power)) / max;\n        return value;\n      });\n  };\n\n  /**\n   * @param {number} pixelRatio Pixel ratio for center rounding.\n   * @return {State} View state.\n   */\n  View.prototype.getState = function getState (pixelRatio) {\n    var center = /** @type {import(\"./coordinate.js\").Coordinate} */ (this.getCenter());\n    var projection = this.getProjection();\n    var resolution = /** @type {number} */ (this.getResolution());\n    var pixelResolution = resolution / pixelRatio;\n    var rotation = this.getRotation();\n    return (\n      /** @type {State} */ ({\n        center: [\n          Math.round(center[0] / pixelResolution) * pixelResolution,\n          Math.round(center[1] / pixelResolution) * pixelResolution\n        ],\n        projection: projection !== undefined ? projection : null,\n        resolution: resolution,\n        rotation: rotation,\n        zoom: this.getZoom()\n      })\n    );\n  };\n\n  /**\n   * Get the current zoom level.  If you configured your view with a resolutions\n   * array (this is rare), this method may return non-integer zoom levels (so\n   * the zoom level is not safe to use as an index into a resolutions array).\n   * @return {number|undefined} Zoom.\n   * @api\n   */\n  View.prototype.getZoom = function getZoom () {\n    var zoom;\n    var resolution = this.getResolution();\n    if (resolution !== undefined) {\n      zoom = this.getZoomForResolution(resolution);\n    }\n    return zoom;\n  };\n\n  /**\n   * Get the zoom level for a resolution.\n   * @param {number} resolution The resolution.\n   * @return {number|undefined} The zoom level for the provided resolution.\n   * @api\n   */\n  View.prototype.getZoomForResolution = function getZoomForResolution (resolution) {\n    var offset = this.minZoom_ || 0;\n    var max, zoomFactor;\n    if (this.resolutions_) {\n      var nearest = linearFindNearest(this.resolutions_, resolution, 1);\n      offset = nearest;\n      max = this.resolutions_[nearest];\n      if (nearest == this.resolutions_.length - 1) {\n        zoomFactor = 2;\n      } else {\n        zoomFactor = max / this.resolutions_[nearest + 1];\n      }\n    } else {\n      max = this.maxResolution_;\n      zoomFactor = this.zoomFactor_;\n    }\n    return offset + Math.log(max / resolution) / Math.log(zoomFactor);\n  };\n\n  /**\n   * Get the resolution for a zoom level.\n   * @param {number} zoom Zoom level.\n   * @return {number} The view resolution for the provided zoom level.\n   * @api\n   */\n  View.prototype.getResolutionForZoom = function getResolutionForZoom (zoom) {\n    return /** @type {number} */ (this.constrainResolution(\n      this.maxResolution_, zoom - this.minZoom_, 0));\n  };\n\n  /**\n   * Fit the given geometry or extent based on the given map size and border.\n   * The size is pixel dimensions of the box to fit the extent into.\n   * In most cases you will want to use the map size, that is `map.getSize()`.\n   * Takes care of the map angle.\n   * @param {import(\"./geom/SimpleGeometry.js\").default|import(\"./extent.js\").Extent} geometryOrExtent The geometry or\n   *     extent to fit the view to.\n   * @param {FitOptions=} opt_options Options.\n   * @api\n   */\n  View.prototype.fit = function fit (geometryOrExtent, opt_options) {\n    var options = opt_options || {};\n    var size = options.size;\n    if (!size) {\n      size = this.getSizeFromViewport_();\n    }\n    /** @type {import(\"./geom/SimpleGeometry.js\").default} */\n    var geometry;\n    assert(Array.isArray(geometryOrExtent) || typeof /** @type {?} */ (geometryOrExtent).getSimplifiedGeometry === 'function',\n      24); // Invalid extent or geometry provided as `geometry`\n    if (Array.isArray(geometryOrExtent)) {\n      assert(!isEmpty(geometryOrExtent),\n        25); // Cannot fit empty extent provided as `geometry`\n      geometry = polygonFromExtent(geometryOrExtent);\n    } else if (geometryOrExtent.getType() === GeometryType.CIRCLE) {\n      geometryOrExtent = geometryOrExtent.getExtent();\n      geometry = polygonFromExtent(geometryOrExtent);\n      geometry.rotate(this.getRotation(), getCenter(geometryOrExtent));\n    } else {\n      geometry = geometryOrExtent;\n    }\n\n    var padding = options.padding !== undefined ? options.padding : [0, 0, 0, 0];\n    var constrainResolution = options.constrainResolution !== undefined ?\n      options.constrainResolution : true;\n    var nearest = options.nearest !== undefined ? options.nearest : false;\n    var minResolution;\n    if (options.minResolution !== undefined) {\n      minResolution = options.minResolution;\n    } else if (options.maxZoom !== undefined) {\n      minResolution = this.constrainResolution(\n        this.maxResolution_, options.maxZoom - this.minZoom_, 0);\n    } else {\n      minResolution = 0;\n    }\n    var coords = geometry.getFlatCoordinates();\n\n    // calculate rotated extent\n    var rotation = this.getRotation();\n    var cosAngle = Math.cos(-rotation);\n    var sinAngle = Math.sin(-rotation);\n    var minRotX = +Infinity;\n    var minRotY = +Infinity;\n    var maxRotX = -Infinity;\n    var maxRotY = -Infinity;\n    var stride = geometry.getStride();\n    for (var i = 0, ii = coords.length; i < ii; i += stride) {\n      var rotX = coords[i] * cosAngle - coords[i + 1] * sinAngle;\n      var rotY = coords[i] * sinAngle + coords[i + 1] * cosAngle;\n      minRotX = Math.min(minRotX, rotX);\n      minRotY = Math.min(minRotY, rotY);\n      maxRotX = Math.max(maxRotX, rotX);\n      maxRotY = Math.max(maxRotY, rotY);\n    }\n\n    // calculate resolution\n    var resolution = this.getResolutionForExtent(\n      [minRotX, minRotY, maxRotX, maxRotY],\n      [size[0] - padding[1] - padding[3], size[1] - padding[0] - padding[2]]);\n    resolution = isNaN(resolution) ? minResolution :\n      Math.max(resolution, minResolution);\n    if (constrainResolution) {\n      var constrainedResolution = this.constrainResolution(resolution, 0, 0);\n      if (!nearest && constrainedResolution < resolution) {\n        constrainedResolution = this.constrainResolution(\n          constrainedResolution, -1, 0);\n      }\n      resolution = constrainedResolution;\n    }\n\n    // calculate center\n    sinAngle = -sinAngle; // go back to original rotation\n    var centerRotX = (minRotX + maxRotX) / 2;\n    var centerRotY = (minRotY + maxRotY) / 2;\n    centerRotX += (padding[1] - padding[3]) / 2 * resolution;\n    centerRotY += (padding[0] - padding[2]) / 2 * resolution;\n    var centerX = centerRotX * cosAngle - centerRotY * sinAngle;\n    var centerY = centerRotY * cosAngle + centerRotX * sinAngle;\n    var center = [centerX, centerY];\n    var callback = options.callback ? options.callback : VOID;\n\n    if (options.duration !== undefined) {\n      this.animate({\n        resolution: resolution,\n        center: center,\n        duration: options.duration,\n        easing: options.easing\n      }, callback);\n    } else {\n      this.setResolution(resolution);\n      this.setCenter(center);\n      animationCallback(callback, true);\n    }\n  };\n\n  /**\n   * Center on coordinate and view position.\n   * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"./size.js\").Size} size Box pixel size.\n   * @param {import(\"./pixel.js\").Pixel} position Position on the view to center on.\n   * @api\n   */\n  View.prototype.centerOn = function centerOn (coordinate, size, position) {\n    // calculate rotated position\n    var rotation = this.getRotation();\n    var cosAngle = Math.cos(-rotation);\n    var sinAngle = Math.sin(-rotation);\n    var rotX = coordinate[0] * cosAngle - coordinate[1] * sinAngle;\n    var rotY = coordinate[1] * cosAngle + coordinate[0] * sinAngle;\n    var resolution = this.getResolution();\n    rotX += (size[0] / 2 - position[0]) * resolution;\n    rotY += (position[1] - size[1] / 2) * resolution;\n\n    // go back to original angle\n    sinAngle = -sinAngle; // go back to original rotation\n    var centerX = rotX * cosAngle - rotY * sinAngle;\n    var centerY = rotY * cosAngle + rotX * sinAngle;\n\n    this.setCenter([centerX, centerY]);\n  };\n\n  /**\n   * @return {boolean} Is defined.\n   */\n  View.prototype.isDef = function isDef () {\n    return !!this.getCenter() && this.getResolution() !== undefined;\n  };\n\n  /**\n   * Rotate the view around a given coordinate.\n   * @param {number} rotation New rotation value for the view.\n   * @param {import(\"./coordinate.js\").Coordinate=} opt_anchor The rotation center.\n   * @api\n   */\n  View.prototype.rotate = function rotate (rotation, opt_anchor) {\n    if (opt_anchor !== undefined) {\n      var center = this.calculateCenterRotate(rotation, opt_anchor);\n      this.setCenter(center);\n    }\n    this.setRotation(rotation);\n  };\n\n  /**\n   * Set the center of the current view.\n   * @param {import(\"./coordinate.js\").Coordinate|undefined} center The center of the view.\n   * @observable\n   * @api\n   */\n  View.prototype.setCenter = function setCenter (center) {\n    this.set(ViewProperty.CENTER, center);\n    if (this.getAnimating()) {\n      this.cancelAnimations();\n    }\n  };\n\n  /**\n   * @param {ViewHint} hint Hint.\n   * @param {number} delta Delta.\n   * @return {number} New value.\n   */\n  View.prototype.setHint = function setHint (hint, delta) {\n    this.hints_[hint] += delta;\n    this.changed();\n    return this.hints_[hint];\n  };\n\n  /**\n   * Set the resolution for this view.\n   * @param {number|undefined} resolution The resolution of the view.\n   * @observable\n   * @api\n   */\n  View.prototype.setResolution = function setResolution (resolution) {\n    this.set(ViewProperty.RESOLUTION, resolution);\n    if (this.getAnimating()) {\n      this.cancelAnimations();\n    }\n  };\n\n  /**\n   * Set the rotation for this view.\n   * @param {number} rotation The rotation of the view in radians.\n   * @observable\n   * @api\n   */\n  View.prototype.setRotation = function setRotation (rotation) {\n    this.set(ViewProperty.ROTATION, rotation);\n    if (this.getAnimating()) {\n      this.cancelAnimations();\n    }\n  };\n\n  /**\n   * Zoom to a specific zoom level.\n   * @param {number} zoom Zoom level.\n   * @api\n   */\n  View.prototype.setZoom = function setZoom (zoom) {\n    this.setResolution(this.getResolutionForZoom(zoom));\n  };\n\n  return View;\n}(BaseObject));\n\n\n/**\n * @param {Function} callback Callback.\n * @param {*} returnValue Return value.\n */\nfunction animationCallback(callback, returnValue) {\n  setTimeout(function() {\n    callback(returnValue);\n  }, 0);\n}\n\n\n/**\n * @param {ViewOptions} options View options.\n * @return {import(\"./centerconstraint.js\").Type} The constraint.\n */\nexport function createCenterConstraint(options) {\n  if (options.extent !== undefined) {\n    return createExtent(options.extent);\n  } else {\n    return centerNone;\n  }\n}\n\n\n/**\n * @param {ViewOptions} options View options.\n * @return {{constraint: import(\"./resolutionconstraint.js\").Type, maxResolution: number,\n *     minResolution: number, minZoom: number, zoomFactor: number}} The constraint.\n */\nexport function createResolutionConstraint(options) {\n  var resolutionConstraint;\n  var maxResolution;\n  var minResolution;\n\n  // TODO: move these to be ol constants\n  // see https://github.com/openlayers/openlayers/issues/2076\n  var defaultMaxZoom = 28;\n  var defaultZoomFactor = 2;\n\n  var minZoom = options.minZoom !== undefined ?\n    options.minZoom : DEFAULT_MIN_ZOOM;\n\n  var maxZoom = options.maxZoom !== undefined ?\n    options.maxZoom : defaultMaxZoom;\n\n  var zoomFactor = options.zoomFactor !== undefined ?\n    options.zoomFactor : defaultZoomFactor;\n\n  if (options.resolutions !== undefined) {\n    var resolutions = options.resolutions;\n    maxResolution = resolutions[minZoom];\n    minResolution = resolutions[maxZoom] !== undefined ?\n      resolutions[maxZoom] : resolutions[resolutions.length - 1];\n    resolutionConstraint = createSnapToResolutions(\n      resolutions);\n  } else {\n    // calculate the default min and max resolution\n    var projection = createProjection(options.projection, 'EPSG:3857');\n    var extent = projection.getExtent();\n    var size = !extent ?\n      // use an extent that can fit the whole world if need be\n      360 * METERS_PER_UNIT[Units.DEGREES] /\n            projection.getMetersPerUnit() :\n      Math.max(getWidth(extent), getHeight(extent));\n\n    var defaultMaxResolution = size / DEFAULT_TILE_SIZE / Math.pow(\n      defaultZoomFactor, DEFAULT_MIN_ZOOM);\n\n    var defaultMinResolution = defaultMaxResolution / Math.pow(\n      defaultZoomFactor, defaultMaxZoom - DEFAULT_MIN_ZOOM);\n\n    // user provided maxResolution takes precedence\n    maxResolution = options.maxResolution;\n    if (maxResolution !== undefined) {\n      minZoom = 0;\n    } else {\n      maxResolution = defaultMaxResolution / Math.pow(zoomFactor, minZoom);\n    }\n\n    // user provided minResolution takes precedence\n    minResolution = options.minResolution;\n    if (minResolution === undefined) {\n      if (options.maxZoom !== undefined) {\n        if (options.maxResolution !== undefined) {\n          minResolution = maxResolution / Math.pow(zoomFactor, maxZoom);\n        } else {\n          minResolution = defaultMaxResolution / Math.pow(zoomFactor, maxZoom);\n        }\n      } else {\n        minResolution = defaultMinResolution;\n      }\n    }\n\n    // given discrete zoom levels, minResolution may be different than provided\n    maxZoom = minZoom + Math.floor(\n      Math.log(maxResolution / minResolution) / Math.log(zoomFactor));\n    minResolution = maxResolution / Math.pow(zoomFactor, maxZoom - minZoom);\n\n    resolutionConstraint = createSnapToPower(\n      zoomFactor, maxResolution, maxZoom - minZoom);\n  }\n  return {constraint: resolutionConstraint, maxResolution: maxResolution,\n    minResolution: minResolution, minZoom: minZoom, zoomFactor: zoomFactor};\n}\n\n\n/**\n * @param {ViewOptions} options View options.\n * @return {import(\"./rotationconstraint.js\").Type} Rotation constraint.\n */\nexport function createRotationConstraint(options) {\n  var enableRotation = options.enableRotation !== undefined ?\n    options.enableRotation : true;\n  if (enableRotation) {\n    var constrainRotation = options.constrainRotation;\n    if (constrainRotation === undefined || constrainRotation === true) {\n      return createSnapToZero();\n    } else if (constrainRotation === false) {\n      return rotationNone;\n    } else if (typeof constrainRotation === 'number') {\n      return createSnapToN(constrainRotation);\n    } else {\n      return rotationNone;\n    }\n  } else {\n    return disable;\n  }\n}\n\n\n/**\n * Determine if an animation involves no view change.\n * @param {Animation} animation The animation.\n * @return {boolean} The animation involves no view change.\n */\nexport function isNoopAnimation(animation) {\n  if (animation.sourceCenter && animation.targetCenter) {\n    if (!coordinatesEqual(animation.sourceCenter, animation.targetCenter)) {\n      return false;\n    }\n  }\n  if (animation.sourceResolution !== animation.targetResolution) {\n    return false;\n  }\n  if (animation.sourceRotation !== animation.targetRotation) {\n    return false;\n  }\n  return true;\n}\n\nexport default View;\n\n//# sourceMappingURL=View.js.map","/**\n * @module ol/layer/Property\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  OPACITY: 'opacity',\n  VISIBLE: 'visible',\n  EXTENT: 'extent',\n  Z_INDEX: 'zIndex',\n  MAX_RESOLUTION: 'maxResolution',\n  MIN_RESOLUTION: 'minResolution',\n  SOURCE: 'source'\n};\n\n//# sourceMappingURL=Property.js.map","/**\n * @module ol/layer/Base\n */\nimport {abstract} from '../util.js';\nimport BaseObject from '../Object.js';\nimport LayerProperty from './Property.js';\nimport {clamp} from '../math.js';\nimport {assign} from '../obj.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n */\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Note that with {@link module:ol/layer/Base} and all its subclasses, any property set in\n * the options is set as a {@link module:ol/Object} property on the layer object, so\n * is observable, and has get/set accessors.\n *\n * @api\n */\nvar BaseLayer = /*@__PURE__*/(function (BaseObject) {\n  function BaseLayer(options) {\n\n    BaseObject.call(this);\n\n    /**\n     * @type {Object<string, *>}\n     */\n    var properties = assign({}, options);\n    properties[LayerProperty.OPACITY] =\n       options.opacity !== undefined ? options.opacity : 1;\n    properties[LayerProperty.VISIBLE] =\n       options.visible !== undefined ? options.visible : true;\n    properties[LayerProperty.Z_INDEX] = options.zIndex;\n    properties[LayerProperty.MAX_RESOLUTION] =\n       options.maxResolution !== undefined ? options.maxResolution : Infinity;\n    properties[LayerProperty.MIN_RESOLUTION] =\n       options.minResolution !== undefined ? options.minResolution : 0;\n\n    this.setProperties(properties);\n\n    /**\n     * @type {import(\"./Layer.js\").State}\n     * @private\n     */\n    this.state_ = null;\n\n    /**\n     * The layer type.\n     * @type {import(\"../LayerType.js\").default}\n     * @protected;\n     */\n    this.type;\n\n  }\n\n  if ( BaseObject ) BaseLayer.__proto__ = BaseObject;\n  BaseLayer.prototype = Object.create( BaseObject && BaseObject.prototype );\n  BaseLayer.prototype.constructor = BaseLayer;\n\n  /**\n   * Get the layer type (used when creating a layer renderer).\n   * @return {import(\"../LayerType.js\").default} The layer type.\n   */\n  BaseLayer.prototype.getType = function getType () {\n    return this.type;\n  };\n\n  /**\n   * @return {import(\"./Layer.js\").State} Layer state.\n   */\n  BaseLayer.prototype.getLayerState = function getLayerState () {\n    /** @type {import(\"./Layer.js\").State} */\n    var state = this.state_ || /** @type {?} */ ({\n      layer: this,\n      managed: true\n    });\n    state.opacity = clamp(this.getOpacity(), 0, 1);\n    state.sourceState = this.getSourceState();\n    state.visible = this.getVisible();\n    state.extent = this.getExtent();\n    state.zIndex = this.getZIndex() || 0;\n    state.maxResolution = this.getMaxResolution();\n    state.minResolution = Math.max(this.getMinResolution(), 0);\n    this.state_ = state;\n\n    return state;\n  };\n\n  /**\n   * @abstract\n   * @param {Array<import(\"./Layer.js\").default>=} opt_array Array of layers (to be\n   *     modified in place).\n   * @return {Array<import(\"./Layer.js\").default>} Array of layers.\n   */\n  BaseLayer.prototype.getLayersArray = function getLayersArray (opt_array) {\n    return abstract();\n  };\n\n  /**\n   * @abstract\n   * @param {Array<import(\"./Layer.js\").State>=} opt_states Optional list of layer\n   *     states (to be modified in place).\n   * @return {Array<import(\"./Layer.js\").State>} List of layer states.\n   */\n  BaseLayer.prototype.getLayerStatesArray = function getLayerStatesArray (opt_states) {\n    return abstract();\n  };\n\n  /**\n   * Return the {@link module:ol/extent~Extent extent} of the layer or `undefined` if it\n   * will be visible regardless of extent.\n   * @return {import(\"../extent.js\").Extent|undefined} The layer extent.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.getExtent = function getExtent () {\n    return (\n      /** @type {import(\"../extent.js\").Extent|undefined} */ (this.get(LayerProperty.EXTENT))\n    );\n  };\n\n  /**\n   * Return the maximum resolution of the layer.\n   * @return {number} The maximum resolution of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.getMaxResolution = function getMaxResolution () {\n    return /** @type {number} */ (this.get(LayerProperty.MAX_RESOLUTION));\n  };\n\n  /**\n   * Return the minimum resolution of the layer.\n   * @return {number} The minimum resolution of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.getMinResolution = function getMinResolution () {\n    return /** @type {number} */ (this.get(LayerProperty.MIN_RESOLUTION));\n  };\n\n  /**\n   * Return the opacity of the layer (between 0 and 1).\n   * @return {number} The opacity of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.getOpacity = function getOpacity () {\n    return /** @type {number} */ (this.get(LayerProperty.OPACITY));\n  };\n\n  /**\n   * @abstract\n   * @return {import(\"../source/State.js\").default} Source state.\n   */\n  BaseLayer.prototype.getSourceState = function getSourceState () {\n    return abstract();\n  };\n\n  /**\n   * Return the visibility of the layer (`true` or `false`).\n   * @return {boolean} The visibility of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.getVisible = function getVisible () {\n    return /** @type {boolean} */ (this.get(LayerProperty.VISIBLE));\n  };\n\n  /**\n   * Return the Z-index of the layer, which is used to order layers before\n   * rendering. The default Z-index is 0.\n   * @return {number} The Z-index of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.getZIndex = function getZIndex () {\n    return /** @type {number} */ (this.get(LayerProperty.Z_INDEX));\n  };\n\n  /**\n   * Set the extent at which the layer is visible.  If `undefined`, the layer\n   * will be visible at all extents.\n   * @param {import(\"../extent.js\").Extent|undefined} extent The extent of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.setExtent = function setExtent (extent) {\n    this.set(LayerProperty.EXTENT, extent);\n  };\n\n  /**\n   * Set the maximum resolution at which the layer is visible.\n   * @param {number} maxResolution The maximum resolution of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.setMaxResolution = function setMaxResolution (maxResolution) {\n    this.set(LayerProperty.MAX_RESOLUTION, maxResolution);\n  };\n\n  /**\n   * Set the minimum resolution at which the layer is visible.\n   * @param {number} minResolution The minimum resolution of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.setMinResolution = function setMinResolution (minResolution) {\n    this.set(LayerProperty.MIN_RESOLUTION, minResolution);\n  };\n\n  /**\n   * Set the opacity of the layer, allowed values range from 0 to 1.\n   * @param {number} opacity The opacity of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.setOpacity = function setOpacity (opacity) {\n    this.set(LayerProperty.OPACITY, opacity);\n  };\n\n  /**\n   * Set the visibility of the layer (`true` or `false`).\n   * @param {boolean} visible The visibility of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.setVisible = function setVisible (visible) {\n    this.set(LayerProperty.VISIBLE, visible);\n  };\n\n  /**\n   * Set Z-index of the layer, which is used to order layers before rendering.\n   * The default Z-index is 0.\n   * @param {number} zindex The z-index of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.setZIndex = function setZIndex (zindex) {\n    this.set(LayerProperty.Z_INDEX, zindex);\n  };\n\n  return BaseLayer;\n}(BaseObject));\n\n\nexport default BaseLayer;\n\n//# sourceMappingURL=Base.js.map","/**\n * @module ol/source/State\n */\n\n/**\n * @enum {string}\n * State of the source, one of 'undefined', 'loading', 'ready' or 'error'.\n */\nexport default {\n  UNDEFINED: 'undefined',\n  LOADING: 'loading',\n  READY: 'ready',\n  ERROR: 'error'\n};\n\n//# sourceMappingURL=State.js.map","/**\n * @module ol/layer/Group\n */\nimport {getUid} from '../util.js';\nimport Collection from '../Collection.js';\nimport CollectionEventType from '../CollectionEventType.js';\nimport {getChangeEventType} from '../Object.js';\nimport ObjectEventType from '../ObjectEventType.js';\nimport {assert} from '../asserts.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {getIntersection} from '../extent.js';\nimport BaseLayer from './Base.js';\nimport {assign, clear} from '../obj.js';\nimport SourceState from '../source/State.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {Array<import(\"./Base.js\").default>|import(\"../Collection.js\").default<import(\"./Base.js\").default>} [layers] Child layers.\n */\n\n\n/**\n * @enum {string}\n * @private\n */\nvar Property = {\n  LAYERS: 'layers'\n};\n\n\n/**\n * @classdesc\n * A {@link module:ol/Collection~Collection} of layers that are handled together.\n *\n * A generic `change` event is triggered when the group/Collection changes.\n *\n * @api\n */\nvar LayerGroup = /*@__PURE__*/(function (BaseLayer) {\n  function LayerGroup(opt_options) {\n\n    var options = opt_options || {};\n    var baseOptions = /** @type {Options} */ (assign({}, options));\n    delete baseOptions.layers;\n\n    var layers = options.layers;\n\n    BaseLayer.call(this, baseOptions);\n\n    /**\n     * @private\n     * @type {Array<import(\"../events.js\").EventsKey>}\n     */\n    this.layersListenerKeys_ = [];\n\n    /**\n     * @private\n     * @type {Object<string, Array<import(\"../events.js\").EventsKey>>}\n     */\n    this.listenerKeys_ = {};\n\n    listen(this,\n      getChangeEventType(Property.LAYERS),\n      this.handleLayersChanged_, this);\n\n    if (layers) {\n      if (Array.isArray(layers)) {\n        layers = new Collection(layers.slice(), {unique: true});\n      } else {\n        assert(typeof /** @type {?} */ (layers).getArray === 'function',\n          43); // Expected `layers` to be an array or a `Collection`\n      }\n    } else {\n      layers = new Collection(undefined, {unique: true});\n    }\n\n    this.setLayers(layers);\n\n  }\n\n  if ( BaseLayer ) LayerGroup.__proto__ = BaseLayer;\n  LayerGroup.prototype = Object.create( BaseLayer && BaseLayer.prototype );\n  LayerGroup.prototype.constructor = LayerGroup;\n\n  /**\n   * @private\n   */\n  LayerGroup.prototype.handleLayerChange_ = function handleLayerChange_ () {\n    this.changed();\n  };\n\n  /**\n   * @private\n   */\n  LayerGroup.prototype.handleLayersChanged_ = function handleLayersChanged_ () {\n    this.layersListenerKeys_.forEach(unlistenByKey);\n    this.layersListenerKeys_.length = 0;\n\n    var layers = this.getLayers();\n    this.layersListenerKeys_.push(\n      listen(layers, CollectionEventType.ADD, this.handleLayersAdd_, this),\n      listen(layers, CollectionEventType.REMOVE, this.handleLayersRemove_, this)\n    );\n\n    for (var id in this.listenerKeys_) {\n      this.listenerKeys_[id].forEach(unlistenByKey);\n    }\n    clear(this.listenerKeys_);\n\n    var layersArray = layers.getArray();\n    for (var i = 0, ii = layersArray.length; i < ii; i++) {\n      var layer = layersArray[i];\n      this.listenerKeys_[getUid(layer)] = [\n        listen(layer, ObjectEventType.PROPERTYCHANGE, this.handleLayerChange_, this),\n        listen(layer, EventType.CHANGE, this.handleLayerChange_, this)\n      ];\n    }\n\n    this.changed();\n  };\n\n  /**\n   * @param {import(\"../Collection.js\").CollectionEvent} collectionEvent CollectionEvent.\n   * @private\n   */\n  LayerGroup.prototype.handleLayersAdd_ = function handleLayersAdd_ (collectionEvent) {\n    var layer = /** @type {import(\"./Base.js\").default} */ (collectionEvent.element);\n    this.listenerKeys_[getUid(layer)] = [\n      listen(layer, ObjectEventType.PROPERTYCHANGE, this.handleLayerChange_, this),\n      listen(layer, EventType.CHANGE, this.handleLayerChange_, this)\n    ];\n    this.changed();\n  };\n\n  /**\n   * @param {import(\"../Collection.js\").CollectionEvent} collectionEvent CollectionEvent.\n   * @private\n   */\n  LayerGroup.prototype.handleLayersRemove_ = function handleLayersRemove_ (collectionEvent) {\n    var layer = /** @type {import(\"./Base.js\").default} */ (collectionEvent.element);\n    var key = getUid(layer);\n    this.listenerKeys_[key].forEach(unlistenByKey);\n    delete this.listenerKeys_[key];\n    this.changed();\n  };\n\n  /**\n   * Returns the {@link module:ol/Collection collection} of {@link module:ol/layer/Layer~Layer layers}\n   * in this group.\n   * @return {!import(\"../Collection.js\").default<import(\"./Base.js\").default>} Collection of\n   *   {@link module:ol/layer/Base layers} that are part of this group.\n   * @observable\n   * @api\n   */\n  LayerGroup.prototype.getLayers = function getLayers () {\n    return (\n      /** @type {!import(\"../Collection.js\").default<import(\"./Base.js\").default>} */ (this.get(Property.LAYERS))\n    );\n  };\n\n  /**\n   * Set the {@link module:ol/Collection collection} of {@link module:ol/layer/Layer~Layer layers}\n   * in this group.\n   * @param {!import(\"../Collection.js\").default<import(\"./Base.js\").default>} layers Collection of\n   *   {@link module:ol/layer/Base layers} that are part of this group.\n   * @observable\n   * @api\n   */\n  LayerGroup.prototype.setLayers = function setLayers (layers) {\n    this.set(Property.LAYERS, layers);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  LayerGroup.prototype.getLayersArray = function getLayersArray (opt_array) {\n    var array = opt_array !== undefined ? opt_array : [];\n    this.getLayers().forEach(function(layer) {\n      layer.getLayersArray(array);\n    });\n    return array;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  LayerGroup.prototype.getLayerStatesArray = function getLayerStatesArray (opt_states) {\n    var states = opt_states !== undefined ? opt_states : [];\n\n    var pos = states.length;\n\n    this.getLayers().forEach(function(layer) {\n      layer.getLayerStatesArray(states);\n    });\n\n    var ownLayerState = this.getLayerState();\n    for (var i = pos, ii = states.length; i < ii; i++) {\n      var layerState = states[i];\n      layerState.opacity *= ownLayerState.opacity;\n      layerState.visible = layerState.visible && ownLayerState.visible;\n      layerState.maxResolution = Math.min(\n        layerState.maxResolution, ownLayerState.maxResolution);\n      layerState.minResolution = Math.max(\n        layerState.minResolution, ownLayerState.minResolution);\n      if (ownLayerState.extent !== undefined) {\n        if (layerState.extent !== undefined) {\n          layerState.extent = getIntersection(layerState.extent, ownLayerState.extent);\n        } else {\n          layerState.extent = ownLayerState.extent;\n        }\n      }\n    }\n\n    return states;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  LayerGroup.prototype.getSourceState = function getSourceState () {\n    return SourceState.READY;\n  };\n\n  return LayerGroup;\n}(BaseLayer));\n\n\nexport default LayerGroup;\n\n//# sourceMappingURL=Group.js.map","/**\n * @module ol/size\n */\n\n\n/**\n * An array of numbers representing a size: `[width, height]`.\n * @typedef {Array<number>} Size\n * @api\n */\n\n\n/**\n * Returns a buffered size.\n * @param {Size} size Size.\n * @param {number} num The amount by which to buffer.\n * @param {Size=} opt_size Optional reusable size array.\n * @return {Size} The buffered size.\n */\nexport function buffer(size, num, opt_size) {\n  if (opt_size === undefined) {\n    opt_size = [0, 0];\n  }\n  opt_size[0] = size[0] + 2 * num;\n  opt_size[1] = size[1] + 2 * num;\n  return opt_size;\n}\n\n\n/**\n * Determines if a size has a positive area.\n * @param {Size} size The size to test.\n * @return {boolean} The size has a positive area.\n */\nexport function hasArea(size) {\n  return size[0] > 0 && size[1] > 0;\n}\n\n\n/**\n * Returns a size scaled by a ratio. The result will be an array of integers.\n * @param {Size} size Size.\n * @param {number} ratio Ratio.\n * @param {Size=} opt_size Optional reusable size array.\n * @return {Size} The scaled size.\n */\nexport function scale(size, ratio, opt_size) {\n  if (opt_size === undefined) {\n    opt_size = [0, 0];\n  }\n  opt_size[0] = (size[0] * ratio + 0.5) | 0;\n  opt_size[1] = (size[1] * ratio + 0.5) | 0;\n  return opt_size;\n}\n\n\n/**\n * Returns an `Size` array for the passed in number (meaning: square) or\n * `Size` array.\n * (meaning: non-square),\n * @param {number|Size} size Width and height.\n * @param {Size=} opt_size Optional reusable size array.\n * @return {Size} Size.\n * @api\n */\nexport function toSize(size, opt_size) {\n  if (Array.isArray(size)) {\n    return size;\n  } else {\n    if (opt_size === undefined) {\n      opt_size = [size, size];\n    } else {\n      opt_size[0] = opt_size[1] = /** @type {number} */ (size);\n    }\n    return opt_size;\n  }\n}\n\n//# sourceMappingURL=size.js.map","/**\n * @module ol/PluggableMap\n */\nimport {getUid} from './util.js';\nimport Collection from './Collection.js';\nimport CollectionEventType from './CollectionEventType.js';\nimport MapBrowserEvent from './MapBrowserEvent.js';\nimport MapBrowserEventHandler from './MapBrowserEventHandler.js';\nimport MapBrowserEventType from './MapBrowserEventType.js';\nimport MapEvent from './MapEvent.js';\nimport MapEventType from './MapEventType.js';\nimport MapProperty from './MapProperty.js';\nimport RenderEventType from './render/EventType.js';\nimport BaseObject, {getChangeEventType} from './Object.js';\nimport ObjectEventType from './ObjectEventType.js';\nimport TileQueue from './TileQueue.js';\nimport View from './View.js';\nimport ViewHint from './ViewHint.js';\nimport {assert} from './asserts.js';\nimport {removeNode} from './dom.js';\nimport {listen, unlistenByKey, unlisten} from './events.js';\nimport {stopPropagation} from './events/Event.js';\nimport EventType from './events/EventType.js';\nimport {createEmpty, clone, createOrUpdateEmpty, equals, getForViewAndSize, isEmpty} from './extent.js';\nimport {TRUE} from './functions.js';\nimport {DEVICE_PIXEL_RATIO, TOUCH} from './has.js';\nimport LayerGroup from './layer/Group.js';\nimport {hasArea} from './size.js';\nimport {DROP} from './structs/PriorityQueue.js';\nimport {create as createTransform, apply as applyTransform} from './transform.js';\n\n\n/**\n * State of the current frame. Only `pixelRatio`, `time` and `viewState` should\n * be used in applications.\n * @typedef {Object} FrameState\n * @property {number} pixelRatio The pixel ratio of the frame.\n * @property {number} time The time when rendering of the frame was requested.\n * @property {import(\"./View.js\").State} viewState The state of the current view.\n * @property {boolean} animate\n * @property {import(\"./transform.js\").Transform} coordinateToPixelTransform\n * @property {null|import(\"./extent.js\").Extent} extent\n * @property {import(\"./coordinate.js\").Coordinate} focus\n * @property {number} index\n * @property {Object<string, import(\"./layer/Layer.js\").State>} layerStates\n * @property {Array<import(\"./layer/Layer.js\").State>} layerStatesArray\n * @property {import(\"./transform.js\").Transform} pixelToCoordinateTransform\n * @property {Array<PostRenderFunction>} postRenderFunctions\n * @property {import(\"./size.js\").Size} size\n * @property {!Object<string, boolean>} skippedFeatureUids\n * @property {TileQueue} tileQueue\n * @property {Object<string, Object<string, import(\"./TileRange.js\").default>>} usedTiles\n * @property {Array<number>} viewHints\n * @property {!Object<string, Object<string, boolean>>} wantedTiles\n */\n\n\n/**\n * @typedef {function(PluggableMap, ?FrameState): boolean} PostRenderFunction\n */\n\n\n/**\n * @typedef {Object} AtPixelOptions\n * @property {undefined|function(import(\"./layer/Layer.js\").default): boolean} layerFilter Layer filter\n * function. The filter function will receive one argument, the\n * {@link module:ol/layer/Layer layer-candidate} and it should return a boolean value.\n * Only layers which are visible and for which this function returns `true`\n * will be tested for features. By default, all visible layers will be tested.\n * @property {number} [hitTolerance=0] Hit-detection tolerance in pixels. Pixels\n * inside the radius around the given position will be checked for features. This only\n * works for the canvas renderer and not for WebGL.\n */\n\n\n/**\n * @typedef {Object} MapOptionsInternal\n * @property {Collection<import(\"./control/Control.js\").default>} [controls]\n * @property {Collection<import(\"./interaction/Interaction.js\").default>} [interactions]\n * @property {HTMLElement|Document} keyboardEventTarget\n * @property {Collection<import(\"./Overlay.js\").default>} overlays\n * @property {Object<string, *>} values\n */\n\n\n/**\n * Object literal with config options for the map.\n * @typedef {Object} MapOptions\n * @property {Collection<import(\"./control/Control.js\").default>|Array<import(\"./control/Control.js\").default>} [controls]\n * Controls initially added to the map. If not specified,\n * {@link module:ol/control~defaults} is used.\n * @property {number} [pixelRatio=window.devicePixelRatio] The ratio between\n * physical pixels and device-independent pixels (dips) on the device.\n * @property {Collection<import(\"./interaction/Interaction.js\").default>|Array<import(\"./interaction/Interaction.js\").default>} [interactions]\n * Interactions that are initially added to the map. If not specified,\n * {@link module:ol/interaction~defaults} is used.\n * @property {HTMLElement|Document|string} [keyboardEventTarget] The element to\n * listen to keyboard events on. This determines when the `KeyboardPan` and\n * `KeyboardZoom` interactions trigger. For example, if this option is set to\n * `document` the keyboard interactions will always trigger. If this option is\n * not specified, the element the library listens to keyboard events on is the\n * map target (i.e. the user-provided div for the map). If this is not\n * `document`, the target element needs to be focused for key events to be\n * emitted, requiring that the target element has a `tabindex` attribute.\n * @property {Array<import(\"./layer/Base.js\").default>|Collection<import(\"./layer/Base.js\").default>|LayerGroup} [layers]\n * Layers. If this is not defined, a map with no layers will be rendered. Note\n * that layers are rendered in the order supplied, so if you want, for example,\n * a vector layer to appear on top of a tile layer, it must come after the tile\n * layer.\n * @property {number} [maxTilesLoading=16] Maximum number tiles to load\n * simultaneously.\n * @property {boolean} [loadTilesWhileAnimating=false] When set to `true`, tiles\n * will be loaded during animations. This may improve the user experience, but\n * can also make animations stutter on devices with slow memory.\n * @property {boolean} [loadTilesWhileInteracting=false] When set to `true`,\n * tiles will be loaded while interacting with the map. This may improve the\n * user experience, but can also make map panning and zooming choppy on devices\n * with slow memory.\n * @property {number} [moveTolerance=1] The minimum distance in pixels the\n * cursor must move to be detected as a map move event instead of a click.\n * Increasing this value can make it easier to click on the map.\n * @property {Collection<import(\"./Overlay.js\").default>|Array<import(\"./Overlay.js\").default>} [overlays]\n * Overlays initially added to the map. By default, no overlays are added.\n * @property {HTMLElement|string} [target] The container for the map, either the\n * element itself or the `id` of the element. If not specified at construction\n * time, {@link module:ol/Map~Map#setTarget} must be called for the map to be\n * rendered.\n * @property {View} [view] The map's view.  No layer sources will be\n * fetched unless this is specified at construction time or through\n * {@link module:ol/Map~Map#setView}.\n */\n\n\n/**\n * @fires import(\"./MapBrowserEvent.js\").MapBrowserEvent\n * @fires import(\"./MapEvent.js\").MapEvent\n * @fires module:ol/render/Event~RenderEvent#postcompose\n * @fires module:ol/render/Event~RenderEvent#precompose\n * @fires module:ol/render/Event~RenderEvent#rendercomplete\n * @api\n */\nvar PluggableMap = /*@__PURE__*/(function (BaseObject) {\n  function PluggableMap(options) {\n\n    BaseObject.call(this);\n\n    var optionsInternal = createOptionsInternal(options);\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.maxTilesLoading_ = options.maxTilesLoading !== undefined ? options.maxTilesLoading : 16;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.loadTilesWhileAnimating_ =\n        options.loadTilesWhileAnimating !== undefined ?\n          options.loadTilesWhileAnimating : false;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.loadTilesWhileInteracting_ =\n        options.loadTilesWhileInteracting !== undefined ?\n          options.loadTilesWhileInteracting : false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.pixelRatio_ = options.pixelRatio !== undefined ?\n      options.pixelRatio : DEVICE_PIXEL_RATIO;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.animationDelayKey_;\n\n    /**\n     * @private\n     */\n    this.animationDelay_ = function() {\n      this.animationDelayKey_ = undefined;\n      this.renderFrame_.call(this, Date.now());\n    }.bind(this);\n\n    /**\n     * @private\n     * @type {import(\"./transform.js\").Transform}\n     */\n    this.coordinateToPixelTransform_ = createTransform();\n\n    /**\n     * @private\n     * @type {import(\"./transform.js\").Transform}\n     */\n    this.pixelToCoordinateTransform_ = createTransform();\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.frameIndex_ = 0;\n\n    /**\n     * @private\n     * @type {?FrameState}\n     */\n    this.frameState_ = null;\n\n    /**\n     * The extent at the previous 'moveend' event.\n     * @private\n     * @type {import(\"./extent.js\").Extent}\n     */\n    this.previousExtent_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"./events.js\").EventsKey}\n     */\n    this.viewPropertyListenerKey_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"./events.js\").EventsKey}\n     */\n    this.viewChangeListenerKey_ = null;\n\n    /**\n     * @private\n     * @type {Array<import(\"./events.js\").EventsKey>}\n     */\n    this.layerGroupPropertyListenerKeys_ = null;\n\n    /**\n     * @private\n     * @type {!HTMLElement}\n     */\n    this.viewport_ = document.createElement('div');\n    this.viewport_.className = 'ol-viewport' + (TOUCH ? ' ol-touch' : '');\n    this.viewport_.style.position = 'relative';\n    this.viewport_.style.overflow = 'hidden';\n    this.viewport_.style.width = '100%';\n    this.viewport_.style.height = '100%';\n    // prevent page zoom on IE >= 10 browsers\n    this.viewport_.style.msTouchAction = 'none';\n    this.viewport_.style.touchAction = 'none';\n\n    /**\n     * @private\n     * @type {!HTMLElement}\n     */\n    this.overlayContainer_ = document.createElement('div');\n    this.overlayContainer_.className = 'ol-overlaycontainer';\n    this.viewport_.appendChild(this.overlayContainer_);\n\n    /**\n     * @private\n     * @type {!HTMLElement}\n     */\n    this.overlayContainerStopEvent_ = document.createElement('div');\n    this.overlayContainerStopEvent_.className = 'ol-overlaycontainer-stopevent';\n    var overlayEvents = [\n      EventType.CLICK,\n      EventType.DBLCLICK,\n      EventType.MOUSEDOWN,\n      EventType.TOUCHSTART,\n      EventType.MSPOINTERDOWN,\n      MapBrowserEventType.POINTERDOWN,\n      EventType.MOUSEWHEEL,\n      EventType.WHEEL\n    ];\n    for (var i = 0, ii = overlayEvents.length; i < ii; ++i) {\n      listen(this.overlayContainerStopEvent_, overlayEvents[i], stopPropagation);\n    }\n    this.viewport_.appendChild(this.overlayContainerStopEvent_);\n\n    /**\n     * @private\n     * @type {MapBrowserEventHandler}\n     */\n    this.mapBrowserEventHandler_ = new MapBrowserEventHandler(this, options.moveTolerance);\n    for (var key in MapBrowserEventType) {\n      listen(this.mapBrowserEventHandler_, MapBrowserEventType[key],\n        this.handleMapBrowserEvent, this);\n    }\n\n    /**\n     * @private\n     * @type {HTMLElement|Document}\n     */\n    this.keyboardEventTarget_ = optionsInternal.keyboardEventTarget;\n\n    /**\n     * @private\n     * @type {Array<import(\"./events.js\").EventsKey>}\n     */\n    this.keyHandlerKeys_ = null;\n\n    listen(this.viewport_, EventType.CONTEXTMENU, this.handleBrowserEvent, this);\n    listen(this.viewport_, EventType.WHEEL, this.handleBrowserEvent, this);\n    listen(this.viewport_, EventType.MOUSEWHEEL, this.handleBrowserEvent, this);\n\n    /**\n     * @type {Collection<import(\"./control/Control.js\").default>}\n     * @protected\n     */\n    this.controls = optionsInternal.controls || new Collection();\n\n    /**\n     * @type {Collection<import(\"./interaction/Interaction.js\").default>}\n     * @protected\n     */\n    this.interactions = optionsInternal.interactions || new Collection();\n\n    /**\n     * @type {Collection<import(\"./Overlay.js\").default>}\n     * @private\n     */\n    this.overlays_ = optionsInternal.overlays;\n\n    /**\n     * A lookup of overlays by id.\n     * @private\n     * @type {Object<string, import(\"./Overlay.js\").default>}\n     */\n    this.overlayIdIndex_ = {};\n\n    /**\n     * @type {import(\"./renderer/Map.js\").default}\n     * @private\n     */\n    this.renderer_ = this.createRenderer();\n\n    /**\n     * @type {function(Event)|undefined}\n     * @private\n     */\n    this.handleResize_;\n\n    /**\n     * @private\n     * @type {import(\"./coordinate.js\").Coordinate}\n     */\n    this.focus_ = null;\n\n    /**\n     * @private\n     * @type {!Array<PostRenderFunction>}\n     */\n    this.postRenderFunctions_ = [];\n\n    /**\n     * @private\n     * @type {TileQueue}\n     */\n    this.tileQueue_ = new TileQueue(\n      this.getTilePriority.bind(this),\n      this.handleTileChange_.bind(this));\n\n    /**\n     * Uids of features to skip at rendering time.\n     * @type {Object<string, boolean>}\n     * @private\n     */\n    this.skippedFeatureUids_ = {};\n\n    listen(\n      this, getChangeEventType(MapProperty.LAYERGROUP),\n      this.handleLayerGroupChanged_, this);\n    listen(this, getChangeEventType(MapProperty.VIEW),\n      this.handleViewChanged_, this);\n    listen(this, getChangeEventType(MapProperty.SIZE),\n      this.handleSizeChanged_, this);\n    listen(this, getChangeEventType(MapProperty.TARGET),\n      this.handleTargetChanged_, this);\n\n    // setProperties will trigger the rendering of the map if the map\n    // is \"defined\" already.\n    this.setProperties(optionsInternal.values);\n\n    this.controls.forEach(\n      /**\n       * @param {import(\"./control/Control.js\").default} control Control.\n       * @this {PluggableMap}\n       */\n      (function(control) {\n        control.setMap(this);\n      }).bind(this));\n\n    listen(this.controls, CollectionEventType.ADD,\n      /**\n       * @param {import(\"./Collection.js\").CollectionEvent} event CollectionEvent.\n       */\n      function(event) {\n        event.element.setMap(this);\n      }, this);\n\n    listen(this.controls, CollectionEventType.REMOVE,\n      /**\n       * @param {import(\"./Collection.js\").CollectionEvent} event CollectionEvent.\n       */\n      function(event) {\n        event.element.setMap(null);\n      }, this);\n\n    this.interactions.forEach(\n      /**\n       * @param {import(\"./interaction/Interaction.js\").default} interaction Interaction.\n       * @this {PluggableMap}\n       */\n      (function(interaction) {\n        interaction.setMap(this);\n      }).bind(this));\n\n    listen(this.interactions, CollectionEventType.ADD,\n      /**\n       * @param {import(\"./Collection.js\").CollectionEvent} event CollectionEvent.\n       */\n      function(event) {\n        event.element.setMap(this);\n      }, this);\n\n    listen(this.interactions, CollectionEventType.REMOVE,\n      /**\n       * @param {import(\"./Collection.js\").CollectionEvent} event CollectionEvent.\n       */\n      function(event) {\n        event.element.setMap(null);\n      }, this);\n\n    this.overlays_.forEach(this.addOverlayInternal_.bind(this));\n\n    listen(this.overlays_, CollectionEventType.ADD,\n      /**\n       * @param {import(\"./Collection.js\").CollectionEvent} event CollectionEvent.\n       */\n      function(event) {\n        this.addOverlayInternal_(/** @type {import(\"./Overlay.js\").default} */ (event.element));\n      }, this);\n\n    listen(this.overlays_, CollectionEventType.REMOVE,\n      /**\n       * @param {import(\"./Collection.js\").CollectionEvent} event CollectionEvent.\n       */\n      function(event) {\n        var overlay = /** @type {import(\"./Overlay.js\").default} */ (event.element);\n        var id = overlay.getId();\n        if (id !== undefined) {\n          delete this.overlayIdIndex_[id.toString()];\n        }\n        event.element.setMap(null);\n      }, this);\n\n  }\n\n  if ( BaseObject ) PluggableMap.__proto__ = BaseObject;\n  PluggableMap.prototype = Object.create( BaseObject && BaseObject.prototype );\n  PluggableMap.prototype.constructor = PluggableMap;\n\n  /**\n   * @abstract\n   * @return {import(\"./renderer/Map.js\").default} The map renderer\n   */\n  PluggableMap.prototype.createRenderer = function createRenderer () {\n    throw new Error('Use a map type that has a createRenderer method');\n  };\n\n  /**\n   * Add the given control to the map.\n   * @param {import(\"./control/Control.js\").default} control Control.\n   * @api\n   */\n  PluggableMap.prototype.addControl = function addControl (control) {\n    this.getControls().push(control);\n  };\n\n  /**\n   * Add the given interaction to the map.\n   * @param {import(\"./interaction/Interaction.js\").default} interaction Interaction to add.\n   * @api\n   */\n  PluggableMap.prototype.addInteraction = function addInteraction (interaction) {\n    this.getInteractions().push(interaction);\n  };\n\n  /**\n   * Adds the given layer to the top of this map. If you want to add a layer\n   * elsewhere in the stack, use `getLayers()` and the methods available on\n   * {@link module:ol/Collection~Collection}.\n   * @param {import(\"./layer/Base.js\").default} layer Layer.\n   * @api\n   */\n  PluggableMap.prototype.addLayer = function addLayer (layer) {\n    var layers = this.getLayerGroup().getLayers();\n    layers.push(layer);\n  };\n\n  /**\n   * Add the given overlay to the map.\n   * @param {import(\"./Overlay.js\").default} overlay Overlay.\n   * @api\n   */\n  PluggableMap.prototype.addOverlay = function addOverlay (overlay) {\n    this.getOverlays().push(overlay);\n  };\n\n  /**\n   * This deals with map's overlay collection changes.\n   * @param {import(\"./Overlay.js\").default} overlay Overlay.\n   * @private\n   */\n  PluggableMap.prototype.addOverlayInternal_ = function addOverlayInternal_ (overlay) {\n    var id = overlay.getId();\n    if (id !== undefined) {\n      this.overlayIdIndex_[id.toString()] = overlay;\n    }\n    overlay.setMap(this);\n  };\n\n  /**\n   *\n   * @inheritDoc\n   */\n  PluggableMap.prototype.disposeInternal = function disposeInternal () {\n    this.mapBrowserEventHandler_.dispose();\n    unlisten(this.viewport_, EventType.CONTEXTMENU, this.handleBrowserEvent, this);\n    unlisten(this.viewport_, EventType.WHEEL, this.handleBrowserEvent, this);\n    unlisten(this.viewport_, EventType.MOUSEWHEEL, this.handleBrowserEvent, this);\n    if (this.handleResize_ !== undefined) {\n      removeEventListener(EventType.RESIZE, this.handleResize_, false);\n      this.handleResize_ = undefined;\n    }\n    if (this.animationDelayKey_) {\n      cancelAnimationFrame(this.animationDelayKey_);\n      this.animationDelayKey_ = undefined;\n    }\n    this.setTarget(null);\n    BaseObject.prototype.disposeInternal.call(this);\n  };\n\n  /**\n   * Detect features that intersect a pixel on the viewport, and execute a\n   * callback with each intersecting feature. Layers included in the detection can\n   * be configured through the `layerFilter` option in `opt_options`.\n   * @param {import(\"./pixel.js\").Pixel} pixel Pixel.\n   * @param {function(this: S, import(\"./Feature.js\").FeatureLike,\n   *     import(\"./layer/Layer.js\").default): T} callback Feature callback. The callback will be\n   *     called with two arguments. The first argument is one\n   *     {@link module:ol/Feature feature} or\n   *     {@link module:ol/render/Feature render feature} at the pixel, the second is\n   *     the {@link module:ol/layer/Layer layer} of the feature and will be null for\n   *     unmanaged layers. To stop detection, callback functions can return a\n   *     truthy value.\n   * @param {AtPixelOptions=} opt_options Optional options.\n   * @return {T|undefined} Callback result, i.e. the return value of last\n   * callback execution, or the first truthy callback return value.\n   * @template S,T\n   * @api\n   */\n  PluggableMap.prototype.forEachFeatureAtPixel = function forEachFeatureAtPixel (pixel, callback, opt_options) {\n    if (!this.frameState_) {\n      return;\n    }\n    var coordinate = this.getCoordinateFromPixel(pixel);\n    opt_options = opt_options !== undefined ? opt_options :\n      /** @type {AtPixelOptions} */ ({});\n    var hitTolerance = opt_options.hitTolerance !== undefined ?\n      opt_options.hitTolerance * this.frameState_.pixelRatio : 0;\n    var layerFilter = opt_options.layerFilter !== undefined ?\n      opt_options.layerFilter : TRUE;\n    return this.renderer_.forEachFeatureAtCoordinate(\n      coordinate, this.frameState_, hitTolerance, callback, null,\n      layerFilter, null);\n  };\n\n  /**\n   * Get all features that intersect a pixel on the viewport.\n   * @param {import(\"./pixel.js\").Pixel} pixel Pixel.\n   * @param {AtPixelOptions=} opt_options Optional options.\n   * @return {Array<import(\"./Feature.js\").FeatureLike>} The detected features or\n   * `null` if none were found.\n   * @api\n   */\n  PluggableMap.prototype.getFeaturesAtPixel = function getFeaturesAtPixel (pixel, opt_options) {\n    var features = null;\n    this.forEachFeatureAtPixel(pixel, function(feature) {\n      if (!features) {\n        features = [];\n      }\n      features.push(feature);\n    }, opt_options);\n    return features;\n  };\n\n  /**\n   * Detect layers that have a color value at a pixel on the viewport, and\n   * execute a callback with each matching layer. Layers included in the\n   * detection can be configured through `opt_layerFilter`.\n   * @param {import(\"./pixel.js\").Pixel} pixel Pixel.\n   * @param {function(this: S, import(\"./layer/Layer.js\").default, (Uint8ClampedArray|Uint8Array)): T} callback\n   *     Layer callback. This callback will receive two arguments: first is the\n   *     {@link module:ol/layer/Layer layer}, second argument is an array representing\n   *     [R, G, B, A] pixel values (0 - 255) and will be `null` for layer types\n   *     that do not currently support this argument. To stop detection, callback\n   *     functions can return a truthy value.\n   * @param {AtPixelOptions=} opt_options Configuration options.\n   * @return {T|undefined} Callback result, i.e. the return value of last\n   * callback execution, or the first truthy callback return value.\n   * @template S,T\n   * @api\n   */\n  PluggableMap.prototype.forEachLayerAtPixel = function forEachLayerAtPixel (pixel, callback, opt_options) {\n    if (!this.frameState_) {\n      return;\n    }\n    var options = opt_options || /** @type {AtPixelOptions} */ ({});\n    var hitTolerance = options.hitTolerance !== undefined ?\n      opt_options.hitTolerance * this.frameState_.pixelRatio : 0;\n    var layerFilter = options.layerFilter || TRUE;\n    return this.renderer_.forEachLayerAtPixel(\n      pixel, this.frameState_, hitTolerance, callback, null, layerFilter, null);\n  };\n\n  /**\n   * Detect if features intersect a pixel on the viewport. Layers included in the\n   * detection can be configured through `opt_layerFilter`.\n   * @param {import(\"./pixel.js\").Pixel} pixel Pixel.\n   * @param {AtPixelOptions=} opt_options Optional options.\n   * @return {boolean} Is there a feature at the given pixel?\n   * @template U\n   * @api\n   */\n  PluggableMap.prototype.hasFeatureAtPixel = function hasFeatureAtPixel (pixel, opt_options) {\n    if (!this.frameState_) {\n      return false;\n    }\n    var coordinate = this.getCoordinateFromPixel(pixel);\n    opt_options = opt_options !== undefined ? opt_options :\n      /** @type {AtPixelOptions} */ ({});\n    var layerFilter = opt_options.layerFilter !== undefined ? opt_options.layerFilter : TRUE;\n    var hitTolerance = opt_options.hitTolerance !== undefined ?\n      opt_options.hitTolerance * this.frameState_.pixelRatio : 0;\n    return this.renderer_.hasFeatureAtCoordinate(\n      coordinate, this.frameState_, hitTolerance, layerFilter, null);\n  };\n\n  /**\n   * Returns the coordinate in view projection for a browser event.\n   * @param {Event} event Event.\n   * @return {import(\"./coordinate.js\").Coordinate} Coordinate.\n   * @api\n   */\n  PluggableMap.prototype.getEventCoordinate = function getEventCoordinate (event) {\n    return this.getCoordinateFromPixel(this.getEventPixel(event));\n  };\n\n  /**\n   * Returns the map pixel position for a browser event relative to the viewport.\n   * @param {Event|TouchEvent} event Event.\n   * @return {import(\"./pixel.js\").Pixel} Pixel.\n   * @api\n   */\n  PluggableMap.prototype.getEventPixel = function getEventPixel (event) {\n    var viewportPosition = this.viewport_.getBoundingClientRect();\n    var eventPosition = 'changedTouches' in event ?\n      /** @type {TouchEvent} */ (event).changedTouches[0] :\n      /** @type {MouseEvent} */ (event);\n\n    return [\n      eventPosition.clientX - viewportPosition.left,\n      eventPosition.clientY - viewportPosition.top\n    ];\n  };\n\n  /**\n   * Get the target in which this map is rendered.\n   * Note that this returns what is entered as an option or in setTarget:\n   * if that was an element, it returns an element; if a string, it returns that.\n   * @return {HTMLElement|string|undefined} The Element or id of the Element that the\n   *     map is rendered in.\n   * @observable\n   * @api\n   */\n  PluggableMap.prototype.getTarget = function getTarget () {\n    return /** @type {HTMLElement|string|undefined} */ (this.get(MapProperty.TARGET));\n  };\n\n  /**\n   * Get the DOM element into which this map is rendered. In contrast to\n   * `getTarget` this method always return an `Element`, or `null` if the\n   * map has no target.\n   * @return {HTMLElement} The element that the map is rendered in.\n   * @api\n   */\n  PluggableMap.prototype.getTargetElement = function getTargetElement () {\n    var target = this.getTarget();\n    if (target !== undefined) {\n      return typeof target === 'string' ? document.getElementById(target) : target;\n    } else {\n      return null;\n    }\n  };\n\n  /**\n   * Get the coordinate for a given pixel.  This returns a coordinate in the\n   * map view projection.\n   * @param {import(\"./pixel.js\").Pixel} pixel Pixel position in the map viewport.\n   * @return {import(\"./coordinate.js\").Coordinate} The coordinate for the pixel position.\n   * @api\n   */\n  PluggableMap.prototype.getCoordinateFromPixel = function getCoordinateFromPixel (pixel) {\n    var frameState = this.frameState_;\n    if (!frameState) {\n      return null;\n    } else {\n      return applyTransform(frameState.pixelToCoordinateTransform, pixel.slice());\n    }\n  };\n\n  /**\n   * Get the map controls. Modifying this collection changes the controls\n   * associated with the map.\n   * @return {Collection<import(\"./control/Control.js\").default>} Controls.\n   * @api\n   */\n  PluggableMap.prototype.getControls = function getControls () {\n    return this.controls;\n  };\n\n  /**\n   * Get the map overlays. Modifying this collection changes the overlays\n   * associated with the map.\n   * @return {Collection<import(\"./Overlay.js\").default>} Overlays.\n   * @api\n   */\n  PluggableMap.prototype.getOverlays = function getOverlays () {\n    return this.overlays_;\n  };\n\n  /**\n   * Get an overlay by its identifier (the value returned by overlay.getId()).\n   * Note that the index treats string and numeric identifiers as the same. So\n   * `map.getOverlayById(2)` will return an overlay with id `'2'` or `2`.\n   * @param {string|number} id Overlay identifier.\n   * @return {import(\"./Overlay.js\").default} Overlay.\n   * @api\n   */\n  PluggableMap.prototype.getOverlayById = function getOverlayById (id) {\n    var overlay = this.overlayIdIndex_[id.toString()];\n    return overlay !== undefined ? overlay : null;\n  };\n\n  /**\n   * Get the map interactions. Modifying this collection changes the interactions\n   * associated with the map.\n   *\n   * Interactions are used for e.g. pan, zoom and rotate.\n   * @return {Collection<import(\"./interaction/Interaction.js\").default>} Interactions.\n   * @api\n   */\n  PluggableMap.prototype.getInteractions = function getInteractions () {\n    return this.interactions;\n  };\n\n  /**\n   * Get the layergroup associated with this map.\n   * @return {LayerGroup} A layer group containing the layers in this map.\n   * @observable\n   * @api\n   */\n  PluggableMap.prototype.getLayerGroup = function getLayerGroup () {\n    return (\n      /** @type {LayerGroup} */ (this.get(MapProperty.LAYERGROUP))\n    );\n  };\n\n  /**\n   * Get the collection of layers associated with this map.\n   * @return {!Collection<import(\"./layer/Base.js\").default>} Layers.\n   * @api\n   */\n  PluggableMap.prototype.getLayers = function getLayers () {\n    var layers = this.getLayerGroup().getLayers();\n    return layers;\n  };\n\n  /**\n   * Get the pixel for a coordinate.  This takes a coordinate in the map view\n   * projection and returns the corresponding pixel.\n   * @param {import(\"./coordinate.js\").Coordinate} coordinate A map coordinate.\n   * @return {import(\"./pixel.js\").Pixel} A pixel position in the map viewport.\n   * @api\n   */\n  PluggableMap.prototype.getPixelFromCoordinate = function getPixelFromCoordinate (coordinate) {\n    var frameState = this.frameState_;\n    if (!frameState) {\n      return null;\n    } else {\n      return applyTransform(frameState.coordinateToPixelTransform, coordinate.slice(0, 2));\n    }\n  };\n\n  /**\n   * Get the map renderer.\n   * @return {import(\"./renderer/Map.js\").default} Renderer\n   */\n  PluggableMap.prototype.getRenderer = function getRenderer () {\n    return this.renderer_;\n  };\n\n  /**\n   * Get the size of this map.\n   * @return {import(\"./size.js\").Size|undefined} The size in pixels of the map in the DOM.\n   * @observable\n   * @api\n   */\n  PluggableMap.prototype.getSize = function getSize () {\n    return (\n      /** @type {import(\"./size.js\").Size|undefined} */ (this.get(MapProperty.SIZE))\n    );\n  };\n\n  /**\n   * Get the view associated with this map. A view manages properties such as\n   * center and resolution.\n   * @return {View} The view that controls this map.\n   * @observable\n   * @api\n   */\n  PluggableMap.prototype.getView = function getView () {\n    return (\n      /** @type {View} */ (this.get(MapProperty.VIEW))\n    );\n  };\n\n  /**\n   * Get the element that serves as the map viewport.\n   * @return {HTMLElement} Viewport.\n   * @api\n   */\n  PluggableMap.prototype.getViewport = function getViewport () {\n    return this.viewport_;\n  };\n\n  /**\n   * Get the element that serves as the container for overlays.  Elements added to\n   * this container will let mousedown and touchstart events through to the map,\n   * so clicks and gestures on an overlay will trigger {@link module:ol/MapBrowserEvent~MapBrowserEvent}\n   * events.\n   * @return {!HTMLElement} The map's overlay container.\n   */\n  PluggableMap.prototype.getOverlayContainer = function getOverlayContainer () {\n    return this.overlayContainer_;\n  };\n\n  /**\n   * Get the element that serves as a container for overlays that don't allow\n   * event propagation. Elements added to this container won't let mousedown and\n   * touchstart events through to the map, so clicks and gestures on an overlay\n   * don't trigger any {@link module:ol/MapBrowserEvent~MapBrowserEvent}.\n   * @return {!HTMLElement} The map's overlay container that stops events.\n   */\n  PluggableMap.prototype.getOverlayContainerStopEvent = function getOverlayContainerStopEvent () {\n    return this.overlayContainerStopEvent_;\n  };\n\n  /**\n   * @param {import(\"./Tile.js\").default} tile Tile.\n   * @param {string} tileSourceKey Tile source key.\n   * @param {import(\"./coordinate.js\").Coordinate} tileCenter Tile center.\n   * @param {number} tileResolution Tile resolution.\n   * @return {number} Tile priority.\n   */\n  PluggableMap.prototype.getTilePriority = function getTilePriority (tile, tileSourceKey, tileCenter, tileResolution) {\n    // Filter out tiles at higher zoom levels than the current zoom level, or that\n    // are outside the visible extent.\n    var frameState = this.frameState_;\n    if (!frameState || !(tileSourceKey in frameState.wantedTiles)) {\n      return DROP;\n    }\n    if (!frameState.wantedTiles[tileSourceKey][tile.getKey()]) {\n      return DROP;\n    }\n    // Prioritize the highest zoom level tiles closest to the focus.\n    // Tiles at higher zoom levels are prioritized using Math.log(tileResolution).\n    // Within a zoom level, tiles are prioritized by the distance in pixels\n    // between the center of the tile and the focus.  The factor of 65536 means\n    // that the prioritization should behave as desired for tiles up to\n    // 65536 * Math.log(2) = 45426 pixels from the focus.\n    var deltaX = tileCenter[0] - frameState.focus[0];\n    var deltaY = tileCenter[1] - frameState.focus[1];\n    return 65536 * Math.log(tileResolution) +\n        Math.sqrt(deltaX * deltaX + deltaY * deltaY) / tileResolution;\n  };\n\n  /**\n   * @param {Event} browserEvent Browser event.\n   * @param {string=} opt_type Type.\n   */\n  PluggableMap.prototype.handleBrowserEvent = function handleBrowserEvent (browserEvent, opt_type) {\n    var type = opt_type || browserEvent.type;\n    var mapBrowserEvent = new MapBrowserEvent(type, this, browserEvent);\n    this.handleMapBrowserEvent(mapBrowserEvent);\n  };\n\n  /**\n   * @param {MapBrowserEvent} mapBrowserEvent The event to handle.\n   */\n  PluggableMap.prototype.handleMapBrowserEvent = function handleMapBrowserEvent (mapBrowserEvent) {\n    if (!this.frameState_) {\n      // With no view defined, we cannot translate pixels into geographical\n      // coordinates so interactions cannot be used.\n      return;\n    }\n    this.focus_ = mapBrowserEvent.coordinate;\n    mapBrowserEvent.frameState = this.frameState_;\n    var interactionsArray = this.getInteractions().getArray();\n    if (this.dispatchEvent(mapBrowserEvent) !== false) {\n      for (var i = interactionsArray.length - 1; i >= 0; i--) {\n        var interaction = interactionsArray[i];\n        if (!interaction.getActive()) {\n          continue;\n        }\n        var cont = interaction.handleEvent(mapBrowserEvent);\n        if (!cont) {\n          break;\n        }\n      }\n    }\n  };\n\n  /**\n   * @protected\n   */\n  PluggableMap.prototype.handlePostRender = function handlePostRender () {\n\n    var frameState = this.frameState_;\n\n    // Manage the tile queue\n    // Image loads are expensive and a limited resource, so try to use them\n    // efficiently:\n    // * When the view is static we allow a large number of parallel tile loads\n    //   to complete the frame as quickly as possible.\n    // * When animating or interacting, image loads can cause janks, so we reduce\n    //   the maximum number of loads per frame and limit the number of parallel\n    //   tile loads to remain reactive to view changes and to reduce the chance of\n    //   loading tiles that will quickly disappear from view.\n    var tileQueue = this.tileQueue_;\n    if (!tileQueue.isEmpty()) {\n      var maxTotalLoading = this.maxTilesLoading_;\n      var maxNewLoads = maxTotalLoading;\n      if (frameState) {\n        var hints = frameState.viewHints;\n        if (hints[ViewHint.ANIMATING]) {\n          maxTotalLoading = this.loadTilesWhileAnimating_ ? 8 : 0;\n          maxNewLoads = 2;\n        }\n        if (hints[ViewHint.INTERACTING]) {\n          maxTotalLoading = this.loadTilesWhileInteracting_ ? 8 : 0;\n          maxNewLoads = 2;\n        }\n      }\n      if (tileQueue.getTilesLoading() < maxTotalLoading) {\n        tileQueue.reprioritize(); // FIXME only call if view has changed\n        tileQueue.loadMoreTiles(maxTotalLoading, maxNewLoads);\n      }\n    }\n    if (frameState && this.hasListener(RenderEventType.RENDERCOMPLETE) && !frameState.animate &&\n        !this.tileQueue_.getTilesLoading() && !getLoading(this.getLayers().getArray())) {\n      this.renderer_.dispatchRenderEvent(RenderEventType.RENDERCOMPLETE, frameState);\n    }\n\n    var postRenderFunctions = this.postRenderFunctions_;\n    for (var i = 0, ii = postRenderFunctions.length; i < ii; ++i) {\n      postRenderFunctions[i](this, frameState);\n    }\n    postRenderFunctions.length = 0;\n  };\n\n  /**\n   * @private\n   */\n  PluggableMap.prototype.handleSizeChanged_ = function handleSizeChanged_ () {\n    this.render();\n  };\n\n  /**\n   * @private\n   */\n  PluggableMap.prototype.handleTargetChanged_ = function handleTargetChanged_ () {\n    // target may be undefined, null, a string or an Element.\n    // If it's a string we convert it to an Element before proceeding.\n    // If it's not now an Element we remove the viewport from the DOM.\n    // If it's an Element we append the viewport element to it.\n\n    var targetElement;\n    if (this.getTarget()) {\n      targetElement = this.getTargetElement();\n    }\n\n    if (this.keyHandlerKeys_) {\n      for (var i = 0, ii = this.keyHandlerKeys_.length; i < ii; ++i) {\n        unlistenByKey(this.keyHandlerKeys_[i]);\n      }\n      this.keyHandlerKeys_ = null;\n    }\n\n    if (!targetElement) {\n      this.renderer_.removeLayerRenderers();\n      removeNode(this.viewport_);\n      if (this.handleResize_ !== undefined) {\n        removeEventListener(EventType.RESIZE, this.handleResize_, false);\n        this.handleResize_ = undefined;\n      }\n    } else {\n      targetElement.appendChild(this.viewport_);\n\n      var keyboardEventTarget = !this.keyboardEventTarget_ ?\n        targetElement : this.keyboardEventTarget_;\n      this.keyHandlerKeys_ = [\n        listen(keyboardEventTarget, EventType.KEYDOWN, this.handleBrowserEvent, this),\n        listen(keyboardEventTarget, EventType.KEYPRESS, this.handleBrowserEvent, this)\n      ];\n\n      if (!this.handleResize_) {\n        this.handleResize_ = this.updateSize.bind(this);\n        window.addEventListener(EventType.RESIZE, this.handleResize_, false);\n      }\n    }\n\n    this.updateSize();\n    // updateSize calls setSize, so no need to call this.render\n    // ourselves here.\n  };\n\n  /**\n   * @private\n   */\n  PluggableMap.prototype.handleTileChange_ = function handleTileChange_ () {\n    this.render();\n  };\n\n  /**\n   * @private\n   */\n  PluggableMap.prototype.handleViewPropertyChanged_ = function handleViewPropertyChanged_ () {\n    this.render();\n  };\n\n  /**\n   * @private\n   */\n  PluggableMap.prototype.handleViewChanged_ = function handleViewChanged_ () {\n    if (this.viewPropertyListenerKey_) {\n      unlistenByKey(this.viewPropertyListenerKey_);\n      this.viewPropertyListenerKey_ = null;\n    }\n    if (this.viewChangeListenerKey_) {\n      unlistenByKey(this.viewChangeListenerKey_);\n      this.viewChangeListenerKey_ = null;\n    }\n    var view = this.getView();\n    if (view) {\n      this.viewport_.setAttribute('data-view', getUid(view));\n      this.viewPropertyListenerKey_ = listen(\n        view, ObjectEventType.PROPERTYCHANGE,\n        this.handleViewPropertyChanged_, this);\n      this.viewChangeListenerKey_ = listen(\n        view, EventType.CHANGE,\n        this.handleViewPropertyChanged_, this);\n    }\n    this.render();\n  };\n\n  /**\n   * @private\n   */\n  PluggableMap.prototype.handleLayerGroupChanged_ = function handleLayerGroupChanged_ () {\n    if (this.layerGroupPropertyListenerKeys_) {\n      this.layerGroupPropertyListenerKeys_.forEach(unlistenByKey);\n      this.layerGroupPropertyListenerKeys_ = null;\n    }\n    var layerGroup = this.getLayerGroup();\n    if (layerGroup) {\n      this.layerGroupPropertyListenerKeys_ = [\n        listen(\n          layerGroup, ObjectEventType.PROPERTYCHANGE,\n          this.render, this),\n        listen(\n          layerGroup, EventType.CHANGE,\n          this.render, this)\n      ];\n    }\n    this.render();\n  };\n\n  /**\n   * @return {boolean} Is rendered.\n   */\n  PluggableMap.prototype.isRendered = function isRendered () {\n    return !!this.frameState_;\n  };\n\n  /**\n   * Requests an immediate render in a synchronous manner.\n   * @api\n   */\n  PluggableMap.prototype.renderSync = function renderSync () {\n    if (this.animationDelayKey_) {\n      cancelAnimationFrame(this.animationDelayKey_);\n    }\n    this.animationDelay_();\n  };\n\n  /**\n   * Request a map rendering (at the next animation frame).\n   * @api\n   */\n  PluggableMap.prototype.render = function render () {\n    if (this.animationDelayKey_ === undefined) {\n      this.animationDelayKey_ = requestAnimationFrame(this.animationDelay_);\n    }\n  };\n\n  /**\n   * Remove the given control from the map.\n   * @param {import(\"./control/Control.js\").default} control Control.\n   * @return {import(\"./control/Control.js\").default|undefined} The removed control (or undefined\n   *     if the control was not found).\n   * @api\n   */\n  PluggableMap.prototype.removeControl = function removeControl (control) {\n    return this.getControls().remove(control);\n  };\n\n  /**\n   * Remove the given interaction from the map.\n   * @param {import(\"./interaction/Interaction.js\").default} interaction Interaction to remove.\n   * @return {import(\"./interaction/Interaction.js\").default|undefined} The removed interaction (or\n   *     undefined if the interaction was not found).\n   * @api\n   */\n  PluggableMap.prototype.removeInteraction = function removeInteraction (interaction) {\n    return this.getInteractions().remove(interaction);\n  };\n\n  /**\n   * Removes the given layer from the map.\n   * @param {import(\"./layer/Base.js\").default} layer Layer.\n   * @return {import(\"./layer/Base.js\").default|undefined} The removed layer (or undefined if the\n   *     layer was not found).\n   * @api\n   */\n  PluggableMap.prototype.removeLayer = function removeLayer (layer) {\n    var layers = this.getLayerGroup().getLayers();\n    return layers.remove(layer);\n  };\n\n  /**\n   * Remove the given overlay from the map.\n   * @param {import(\"./Overlay.js\").default} overlay Overlay.\n   * @return {import(\"./Overlay.js\").default|undefined} The removed overlay (or undefined\n   *     if the overlay was not found).\n   * @api\n   */\n  PluggableMap.prototype.removeOverlay = function removeOverlay (overlay) {\n    return this.getOverlays().remove(overlay);\n  };\n\n  /**\n   * @param {number} time Time.\n   * @private\n   */\n  PluggableMap.prototype.renderFrame_ = function renderFrame_ (time) {\n    var viewState;\n\n    var size = this.getSize();\n    var view = this.getView();\n    var extent = createEmpty();\n    var previousFrameState = this.frameState_;\n    /** @type {?FrameState} */\n    var frameState = null;\n    if (size !== undefined && hasArea(size) && view && view.isDef()) {\n      var viewHints = view.getHints(this.frameState_ ? this.frameState_.viewHints : undefined);\n      var layerStatesArray = this.getLayerGroup().getLayerStatesArray();\n      var layerStates = {};\n      for (var i = 0, ii = layerStatesArray.length; i < ii; ++i) {\n        layerStates[getUid(layerStatesArray[i].layer)] = layerStatesArray[i];\n      }\n      viewState = view.getState(this.pixelRatio_);\n      frameState = /** @type {FrameState} */ ({\n        animate: false,\n        coordinateToPixelTransform: this.coordinateToPixelTransform_,\n        extent: extent,\n        focus: this.focus_ ? this.focus_ : viewState.center,\n        index: this.frameIndex_++,\n        layerStates: layerStates,\n        layerStatesArray: layerStatesArray,\n        pixelRatio: this.pixelRatio_,\n        pixelToCoordinateTransform: this.pixelToCoordinateTransform_,\n        postRenderFunctions: [],\n        size: size,\n        skippedFeatureUids: this.skippedFeatureUids_,\n        tileQueue: this.tileQueue_,\n        time: time,\n        usedTiles: {},\n        viewState: viewState,\n        viewHints: viewHints,\n        wantedTiles: {}\n      });\n    }\n\n    if (frameState) {\n      frameState.extent = getForViewAndSize(viewState.center,\n        viewState.resolution, viewState.rotation, frameState.size, extent);\n    }\n\n    this.frameState_ = frameState;\n    this.renderer_.renderFrame(frameState);\n\n    if (frameState) {\n      if (frameState.animate) {\n        this.render();\n      }\n      Array.prototype.push.apply(this.postRenderFunctions_, frameState.postRenderFunctions);\n\n      if (previousFrameState) {\n        var moveStart = !this.previousExtent_ ||\n                    (!isEmpty(this.previousExtent_) &&\n                    !equals(frameState.extent, this.previousExtent_));\n        if (moveStart) {\n          this.dispatchEvent(\n            new MapEvent(MapEventType.MOVESTART, this, previousFrameState));\n          this.previousExtent_ = createOrUpdateEmpty(this.previousExtent_);\n        }\n      }\n\n      var idle = this.previousExtent_ &&\n          !frameState.viewHints[ViewHint.ANIMATING] &&\n          !frameState.viewHints[ViewHint.INTERACTING] &&\n          !equals(frameState.extent, this.previousExtent_);\n\n      if (idle) {\n        this.dispatchEvent(new MapEvent(MapEventType.MOVEEND, this, frameState));\n        clone(frameState.extent, this.previousExtent_);\n      }\n    }\n\n    this.dispatchEvent(new MapEvent(MapEventType.POSTRENDER, this, frameState));\n\n    setTimeout(this.handlePostRender.bind(this), 0);\n\n  };\n\n  /**\n   * Sets the layergroup of this map.\n   * @param {LayerGroup} layerGroup A layer group containing the layers in this map.\n   * @observable\n   * @api\n   */\n  PluggableMap.prototype.setLayerGroup = function setLayerGroup (layerGroup) {\n    this.set(MapProperty.LAYERGROUP, layerGroup);\n  };\n\n  /**\n   * Set the size of this map.\n   * @param {import(\"./size.js\").Size|undefined} size The size in pixels of the map in the DOM.\n   * @observable\n   * @api\n   */\n  PluggableMap.prototype.setSize = function setSize (size) {\n    this.set(MapProperty.SIZE, size);\n  };\n\n  /**\n   * Set the target element to render this map into.\n   * @param {HTMLElement|string|undefined} target The Element or id of the Element\n   *     that the map is rendered in.\n   * @observable\n   * @api\n   */\n  PluggableMap.prototype.setTarget = function setTarget (target) {\n    this.set(MapProperty.TARGET, target);\n  };\n\n  /**\n   * Set the view for this map.\n   * @param {View} view The view that controls this map.\n   * @observable\n   * @api\n   */\n  PluggableMap.prototype.setView = function setView (view) {\n    this.set(MapProperty.VIEW, view);\n  };\n\n  /**\n   * @param {import(\"./Feature.js\").default} feature Feature.\n   */\n  PluggableMap.prototype.skipFeature = function skipFeature (feature) {\n    this.skippedFeatureUids_[getUid(feature)] = true;\n    this.render();\n  };\n\n  /**\n   * Force a recalculation of the map viewport size.  This should be called when\n   * third-party code changes the size of the map viewport.\n   * @api\n   */\n  PluggableMap.prototype.updateSize = function updateSize () {\n    var targetElement = this.getTargetElement();\n\n    if (!targetElement) {\n      this.setSize(undefined);\n    } else {\n      var computedStyle = getComputedStyle(targetElement);\n      this.setSize([\n        targetElement.offsetWidth -\n            parseFloat(computedStyle['borderLeftWidth']) -\n            parseFloat(computedStyle['paddingLeft']) -\n            parseFloat(computedStyle['paddingRight']) -\n            parseFloat(computedStyle['borderRightWidth']),\n        targetElement.offsetHeight -\n            parseFloat(computedStyle['borderTopWidth']) -\n            parseFloat(computedStyle['paddingTop']) -\n            parseFloat(computedStyle['paddingBottom']) -\n            parseFloat(computedStyle['borderBottomWidth'])\n      ]);\n    }\n  };\n\n  /**\n   * @param {import(\"./Feature.js\").default} feature Feature.\n   */\n  PluggableMap.prototype.unskipFeature = function unskipFeature (feature) {\n    delete this.skippedFeatureUids_[getUid(feature)];\n    this.render();\n  };\n\n  return PluggableMap;\n}(BaseObject));\n\n\n/**\n * @param {MapOptions} options Map options.\n * @return {MapOptionsInternal} Internal map options.\n */\nfunction createOptionsInternal(options) {\n\n  /**\n   * @type {HTMLElement|Document}\n   */\n  var keyboardEventTarget = null;\n  if (options.keyboardEventTarget !== undefined) {\n    keyboardEventTarget = typeof options.keyboardEventTarget === 'string' ?\n      document.getElementById(options.keyboardEventTarget) :\n      options.keyboardEventTarget;\n  }\n\n  /**\n   * @type {Object<string, *>}\n   */\n  var values = {};\n\n  var layerGroup = options.layers && typeof /** @type {?} */ (options.layers).getLayers === 'function' ?\n    /** @type {LayerGroup} */ (options.layers) : new LayerGroup({layers: /** @type {Collection} */ (options.layers)});\n  values[MapProperty.LAYERGROUP] = layerGroup;\n\n  values[MapProperty.TARGET] = options.target;\n\n  values[MapProperty.VIEW] = options.view !== undefined ?\n    options.view : new View();\n\n  var controls;\n  if (options.controls !== undefined) {\n    if (Array.isArray(options.controls)) {\n      controls = new Collection(options.controls.slice());\n    } else {\n      assert(typeof /** @type {?} */ (options.controls).getArray === 'function',\n        47); // Expected `controls` to be an array or an `import(\"./Collection.js\").Collection`\n      controls = /** @type {Collection} */ (options.controls);\n    }\n  }\n\n  var interactions;\n  if (options.interactions !== undefined) {\n    if (Array.isArray(options.interactions)) {\n      interactions = new Collection(options.interactions.slice());\n    } else {\n      assert(typeof /** @type {?} */ (options.interactions).getArray === 'function',\n        48); // Expected `interactions` to be an array or an `import(\"./Collection.js\").Collection`\n      interactions = /** @type {Collection} */ (options.interactions);\n    }\n  }\n\n  var overlays;\n  if (options.overlays !== undefined) {\n    if (Array.isArray(options.overlays)) {\n      overlays = new Collection(options.overlays.slice());\n    } else {\n      assert(typeof /** @type {?} */ (options.overlays).getArray === 'function',\n        49); // Expected `overlays` to be an array or an `import(\"./Collection.js\").Collection`\n      overlays = options.overlays;\n    }\n  } else {\n    overlays = new Collection();\n  }\n\n  return {\n    controls: controls,\n    interactions: interactions,\n    keyboardEventTarget: keyboardEventTarget,\n    overlays: overlays,\n    values: values\n  };\n\n}\nexport default PluggableMap;\n\n/**\n * @param  {Array<import(\"./layer/Base.js\").default>} layers Layers.\n * @return {boolean} Layers have sources that are still loading.\n */\nfunction getLoading(layers) {\n  for (var i = 0, ii = layers.length; i < ii; ++i) {\n    var layer = layers[i];\n    if (typeof /** @type {?} */ (layer).getLayers === 'function') {\n      return getLoading(/** @type {LayerGroup} */ (layer).getLayers().getArray());\n    } else {\n      var source = /** @type {import(\"./layer/Layer.js\").default} */ (\n        layer).getSource();\n      if (source && source.loading) {\n        return true;\n      }\n    }\n  }\n  return false;\n}\n\n//# sourceMappingURL=PluggableMap.js.map","/**\n * @module ol/css\n */\n\n\n/**\n * The CSS class for hidden feature.\n *\n * @const\n * @type {string}\n */\nexport var CLASS_HIDDEN = 'ol-hidden';\n\n\n/**\n * The CSS class that we'll give the DOM elements to have them selectable.\n *\n * @const\n * @type {string}\n */\nexport var CLASS_SELECTABLE = 'ol-selectable';\n\n\n/**\n * The CSS class that we'll give the DOM elements to have them unselectable.\n *\n * @const\n * @type {string}\n */\nexport var CLASS_UNSELECTABLE = 'ol-unselectable';\n\n\n/**\n * The CSS class for unsupported feature.\n *\n * @const\n * @type {string}\n */\nexport var CLASS_UNSUPPORTED = 'ol-unsupported';\n\n\n/**\n * The CSS class for controls.\n *\n * @const\n * @type {string}\n */\nexport var CLASS_CONTROL = 'ol-control';\n\n\n/**\n * The CSS class that we'll give the DOM elements that are collapsed, i.e.\n * to those elements which usually can be expanded.\n *\n * @const\n * @type {string}\n */\nexport var CLASS_COLLAPSED = 'ol-collapsed';\n\n\n/**\n * Get the list of font families from a font spec.  Note that this doesn't work\n * for font families that have commas in them.\n * @param {string} The CSS font property.\n * @return {Object<string>} The font families (or null if the input spec is invalid).\n */\nexport var getFontFamilies = (function() {\n  var style;\n  var cache = {};\n  return function(font) {\n    if (!style) {\n      style = document.createElement('div').style;\n    }\n    if (!(font in cache)) {\n      style.font = font;\n      var family = style.fontFamily;\n      style.font = '';\n      if (!family) {\n        return null;\n      }\n      cache[font] = family.split(/,\\s?/);\n    }\n    return cache[font];\n  };\n})();\n\n//# sourceMappingURL=css.js.map","/**\n * @module ol/layer/Layer\n */\nimport {listen, unlistenByKey} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {getUid} from '../util.js';\nimport {getChangeEventType} from '../Object.js';\nimport BaseLayer from './Base.js';\nimport LayerProperty from './Property.js';\nimport {assign} from '../obj.js';\nimport RenderEventType from '../render/EventType.js';\nimport SourceState from '../source/State.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {import(\"../source/Source.js\").default} [source] Source for this layer.  If not provided to the constructor,\n * the source can be set by calling {@link module:ol/layer/Layer#setSource layer.setSource(source)} after\n * construction.\n * @property {import(\"../PluggableMap.js\").default} [map] Map.\n */\n\n\n/**\n * @typedef {Object} State\n * @property {import(\"./Base.js\").default} layer\n * @property {number} opacity\n * @property {SourceState} sourceState\n * @property {boolean} visible\n * @property {boolean} managed\n * @property {import(\"../extent.js\").Extent} [extent]\n * @property {number} zIndex\n * @property {number} maxResolution\n * @property {number} minResolution\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * A visual representation of raster or vector map data.\n * Layers group together those properties that pertain to how the data is to be\n * displayed, irrespective of the source of that data.\n *\n * Layers are usually added to a map with {@link module:ol/Map#addLayer}. Components\n * like {@link module:ol/interaction/Select~Select} use unmanaged layers\n * internally. These unmanaged layers are associated with the map using\n * {@link module:ol/layer/Layer~Layer#setMap} instead.\n *\n * A generic `change` event is fired when the state of the source changes.\n *\n * @fires import(\"../render/Event.js\").RenderEvent\n */\nvar Layer = /*@__PURE__*/(function (BaseLayer) {\n  function Layer(options) {\n\n    var baseOptions = assign({}, options);\n    delete baseOptions.source;\n\n    BaseLayer.call(this, baseOptions);\n\n    /**\n     * @private\n     * @type {?import(\"../events.js\").EventsKey}\n     */\n    this.mapPrecomposeKey_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../events.js\").EventsKey}\n     */\n    this.mapRenderKey_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../events.js\").EventsKey}\n     */\n    this.sourceChangeKey_ = null;\n\n    if (options.map) {\n      this.setMap(options.map);\n    }\n\n    listen(this,\n      getChangeEventType(LayerProperty.SOURCE),\n      this.handleSourcePropertyChange_, this);\n\n    var source = options.source ? options.source : null;\n    this.setSource(source);\n  }\n\n  if ( BaseLayer ) Layer.__proto__ = BaseLayer;\n  Layer.prototype = Object.create( BaseLayer && BaseLayer.prototype );\n  Layer.prototype.constructor = Layer;\n\n  /**\n   * @inheritDoc\n   */\n  Layer.prototype.getLayersArray = function getLayersArray (opt_array) {\n    var array = opt_array ? opt_array : [];\n    array.push(this);\n    return array;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  Layer.prototype.getLayerStatesArray = function getLayerStatesArray (opt_states) {\n    var states = opt_states ? opt_states : [];\n    states.push(this.getLayerState());\n    return states;\n  };\n\n  /**\n   * Get the layer source.\n   * @return {import(\"../source/Source.js\").default} The layer source (or `null` if not yet set).\n   * @observable\n   * @api\n   */\n  Layer.prototype.getSource = function getSource () {\n    var source = this.get(LayerProperty.SOURCE);\n    return (\n      /** @type {import(\"../source/Source.js\").default} */ (source) || null\n    );\n  };\n\n  /**\n    * @inheritDoc\n    */\n  Layer.prototype.getSourceState = function getSourceState () {\n    var source = this.getSource();\n    return !source ? SourceState.UNDEFINED : source.getState();\n  };\n\n  /**\n   * @private\n   */\n  Layer.prototype.handleSourceChange_ = function handleSourceChange_ () {\n    this.changed();\n  };\n\n  /**\n   * @private\n   */\n  Layer.prototype.handleSourcePropertyChange_ = function handleSourcePropertyChange_ () {\n    if (this.sourceChangeKey_) {\n      unlistenByKey(this.sourceChangeKey_);\n      this.sourceChangeKey_ = null;\n    }\n    var source = this.getSource();\n    if (source) {\n      this.sourceChangeKey_ = listen(source,\n        EventType.CHANGE, this.handleSourceChange_, this);\n    }\n    this.changed();\n  };\n\n  /**\n   * Sets the layer to be rendered on top of other layers on a map. The map will\n   * not manage this layer in its layers collection, and the callback in\n   * {@link module:ol/Map#forEachLayerAtPixel} will receive `null` as layer. This\n   * is useful for temporary layers. To remove an unmanaged layer from the map,\n   * use `#setMap(null)`.\n   *\n   * To add the layer to a map and have it managed by the map, use\n   * {@link module:ol/Map#addLayer} instead.\n   * @param {import(\"../PluggableMap.js\").default} map Map.\n   * @api\n   */\n  Layer.prototype.setMap = function setMap (map) {\n    if (this.mapPrecomposeKey_) {\n      unlistenByKey(this.mapPrecomposeKey_);\n      this.mapPrecomposeKey_ = null;\n    }\n    if (!map) {\n      this.changed();\n    }\n    if (this.mapRenderKey_) {\n      unlistenByKey(this.mapRenderKey_);\n      this.mapRenderKey_ = null;\n    }\n    if (map) {\n      this.mapPrecomposeKey_ = listen(map, RenderEventType.PRECOMPOSE, function(evt) {\n        var renderEvent = /** @type {import(\"../render/Event.js\").default} */ (evt);\n        var layerState = this.getLayerState();\n        layerState.managed = false;\n        if (this.getZIndex() === undefined) {\n          layerState.zIndex = Infinity;\n        }\n        renderEvent.frameState.layerStatesArray.push(layerState);\n        renderEvent.frameState.layerStates[getUid(this)] = layerState;\n      }, this);\n      this.mapRenderKey_ = listen(this, EventType.CHANGE, map.render, map);\n      this.changed();\n    }\n  };\n\n  /**\n   * Set the layer source.\n   * @param {import(\"../source/Source.js\").default} source The layer source.\n   * @observable\n   * @api\n   */\n  Layer.prototype.setSource = function setSource (source) {\n    this.set(LayerProperty.SOURCE, source);\n  };\n\n  return Layer;\n}(BaseLayer));\n\n\n/**\n * Return `true` if the layer is visible, and if the passed resolution is\n * between the layer's minResolution and maxResolution. The comparison is\n * inclusive for `minResolution` and exclusive for `maxResolution`.\n * @param {State} layerState Layer state.\n * @param {number} resolution Resolution.\n * @return {boolean} The layer is visible at the given resolution.\n */\nexport function visibleAtResolution(layerState, resolution) {\n  return layerState.visible && resolution >= layerState.minResolution &&\n      resolution < layerState.maxResolution;\n}\n\n\nexport default Layer;\n\n//# sourceMappingURL=Layer.js.map","/**\n * @module ol/control/Attribution\n */\nimport {equals} from '../array.js';\nimport Control from './Control.js';\nimport {CLASS_CONTROL, CLASS_UNSELECTABLE, CLASS_COLLAPSED} from '../css.js';\nimport {removeChildren, replaceNode} from '../dom.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {visibleAtResolution} from '../layer/Layer.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-attribution'] CSS class name.\n * @property {HTMLElement|string} [target] Specify a target if you\n * want the control to be rendered outside of the map's\n * viewport.\n * @property {boolean} [collapsible] Specify if attributions can\n * be collapsed. If not specified, sources control this behavior with their\n * `attributionsCollapsible` setting.\n * @property {boolean} [collapsed=true] Specify if attributions should\n * be collapsed at startup.\n * @property {string} [tipLabel='Attributions'] Text label to use for the button tip.\n * @property {string} [label='i'] Text label to use for the\n * collapsed attributions button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string|HTMLElement} [collapseLabel='»'] Text label to use\n * for the expanded attributions button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {function(import(\"../MapEvent.js\").default)} [render] Function called when\n * the control should be re-rendered. This is called in a `requestAnimationFrame`\n * callback.\n */\n\n\n/**\n * @classdesc\n * Control to show all the attributions associated with the layer sources\n * in the map. This control is one of the default controls included in maps.\n * By default it will show in the bottom right portion of the map, but this can\n * be changed by using a css selector for `.ol-attribution`.\n *\n * @api\n */\nvar Attribution = /*@__PURE__*/(function (Control) {\n  function Attribution(opt_options) {\n\n    var options = opt_options ? opt_options : {};\n\n    Control.call(this, {\n      element: document.createElement('div'),\n      render: options.render || render,\n      target: options.target\n    });\n\n    /**\n     * @private\n     * @type {HTMLElement}\n     */\n    this.ulElement_ = document.createElement('ul');\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.collapsed_ = options.collapsed !== undefined ? options.collapsed : true;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.overrideCollapsible_ = options.collapsible !== undefined;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.collapsible_ = options.collapsible !== undefined ?\n      options.collapsible : true;\n\n    if (!this.collapsible_) {\n      this.collapsed_ = false;\n    }\n\n    var className = options.className !== undefined ? options.className : 'ol-attribution';\n\n    var tipLabel = options.tipLabel !== undefined ? options.tipLabel : 'Attributions';\n\n    var collapseLabel = options.collapseLabel !== undefined ? options.collapseLabel : '\\u00BB';\n\n    if (typeof collapseLabel === 'string') {\n      /**\n       * @private\n       * @type {HTMLElement}\n       */\n      this.collapseLabel_ = document.createElement('span');\n      this.collapseLabel_.textContent = collapseLabel;\n    } else {\n      this.collapseLabel_ = collapseLabel;\n    }\n\n    var label = options.label !== undefined ? options.label : 'i';\n\n    if (typeof label === 'string') {\n      /**\n       * @private\n       * @type {HTMLElement}\n       */\n      this.label_ = document.createElement('span');\n      this.label_.textContent = label;\n    } else {\n      this.label_ = label;\n    }\n\n\n    var activeLabel = (this.collapsible_ && !this.collapsed_) ?\n      this.collapseLabel_ : this.label_;\n    var button = document.createElement('button');\n    button.setAttribute('type', 'button');\n    button.title = tipLabel;\n    button.appendChild(activeLabel);\n\n    listen(button, EventType.CLICK, this.handleClick_, this);\n\n    var cssClasses = className + ' ' + CLASS_UNSELECTABLE + ' ' + CLASS_CONTROL +\n        (this.collapsed_ && this.collapsible_ ? ' ' + CLASS_COLLAPSED : '') +\n        (this.collapsible_ ? '' : ' ol-uncollapsible');\n    var element = this.element;\n    element.className = cssClasses;\n    element.appendChild(this.ulElement_);\n    element.appendChild(button);\n\n    /**\n     * A list of currently rendered resolutions.\n     * @type {Array<string>}\n     * @private\n     */\n    this.renderedAttributions_ = [];\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.renderedVisible_ = true;\n\n  }\n\n  if ( Control ) Attribution.__proto__ = Control;\n  Attribution.prototype = Object.create( Control && Control.prototype );\n  Attribution.prototype.constructor = Attribution;\n\n  /**\n   * Collect a list of visible attributions and set the collapsible state.\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   * @return {Array<string>} Attributions.\n   * @private\n   */\n  Attribution.prototype.collectSourceAttributions_ = function collectSourceAttributions_ (frameState) {\n    /**\n     * Used to determine if an attribution already exists.\n     * @type {!Object<string, boolean>}\n     */\n    var lookup = {};\n\n    /**\n     * A list of visible attributions.\n     * @type {Array<string>}\n     */\n    var visibleAttributions = [];\n\n    var layerStatesArray = frameState.layerStatesArray;\n    var resolution = frameState.viewState.resolution;\n    for (var i = 0, ii = layerStatesArray.length; i < ii; ++i) {\n      var layerState = layerStatesArray[i];\n      if (!visibleAtResolution(layerState, resolution)) {\n        continue;\n      }\n\n      var source = /** @type {import(\"../layer/Layer.js\").default} */ (layerState.layer).getSource();\n      if (!source) {\n        continue;\n      }\n\n      var attributionGetter = source.getAttributions();\n      if (!attributionGetter) {\n        continue;\n      }\n\n      var attributions = attributionGetter(frameState);\n      if (!attributions) {\n        continue;\n      }\n\n      if (!this.overrideCollapsible_ && source.getAttributionsCollapsible() === false) {\n        this.setCollapsible(false);\n      }\n\n      if (Array.isArray(attributions)) {\n        for (var j = 0, jj = attributions.length; j < jj; ++j) {\n          if (!(attributions[j] in lookup)) {\n            visibleAttributions.push(attributions[j]);\n            lookup[attributions[j]] = true;\n          }\n        }\n      } else {\n        if (!(attributions in lookup)) {\n          visibleAttributions.push(attributions);\n          lookup[attributions] = true;\n        }\n      }\n    }\n    return visibleAttributions;\n  };\n\n  /**\n   * @private\n   * @param {?import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   */\n  Attribution.prototype.updateElement_ = function updateElement_ (frameState) {\n    if (!frameState) {\n      if (this.renderedVisible_) {\n        this.element.style.display = 'none';\n        this.renderedVisible_ = false;\n      }\n      return;\n    }\n\n    var attributions = this.collectSourceAttributions_(frameState);\n\n    var visible = attributions.length > 0;\n    if (this.renderedVisible_ != visible) {\n      this.element.style.display = visible ? '' : 'none';\n      this.renderedVisible_ = visible;\n    }\n\n    if (equals(attributions, this.renderedAttributions_)) {\n      return;\n    }\n\n    removeChildren(this.ulElement_);\n\n    // append the attributions\n    for (var i = 0, ii = attributions.length; i < ii; ++i) {\n      var element = document.createElement('li');\n      element.innerHTML = attributions[i];\n      this.ulElement_.appendChild(element);\n    }\n\n    this.renderedAttributions_ = attributions;\n  };\n\n  /**\n   * @param {MouseEvent} event The event to handle\n   * @private\n   */\n  Attribution.prototype.handleClick_ = function handleClick_ (event) {\n    event.preventDefault();\n    this.handleToggle_();\n  };\n\n  /**\n   * @private\n   */\n  Attribution.prototype.handleToggle_ = function handleToggle_ () {\n    this.element.classList.toggle(CLASS_COLLAPSED);\n    if (this.collapsed_) {\n      replaceNode(this.collapseLabel_, this.label_);\n    } else {\n      replaceNode(this.label_, this.collapseLabel_);\n    }\n    this.collapsed_ = !this.collapsed_;\n  };\n\n  /**\n   * Return `true` if the attribution is collapsible, `false` otherwise.\n   * @return {boolean} True if the widget is collapsible.\n   * @api\n   */\n  Attribution.prototype.getCollapsible = function getCollapsible () {\n    return this.collapsible_;\n  };\n\n  /**\n   * Set whether the attribution should be collapsible.\n   * @param {boolean} collapsible True if the widget is collapsible.\n   * @api\n   */\n  Attribution.prototype.setCollapsible = function setCollapsible (collapsible) {\n    if (this.collapsible_ === collapsible) {\n      return;\n    }\n    this.collapsible_ = collapsible;\n    this.element.classList.toggle('ol-uncollapsible');\n    if (!collapsible && this.collapsed_) {\n      this.handleToggle_();\n    }\n  };\n\n  /**\n   * Collapse or expand the attribution according to the passed parameter. Will\n   * not do anything if the attribution isn't collapsible or if the current\n   * collapsed state is already the one requested.\n   * @param {boolean} collapsed True if the widget is collapsed.\n   * @api\n   */\n  Attribution.prototype.setCollapsed = function setCollapsed (collapsed) {\n    if (!this.collapsible_ || this.collapsed_ === collapsed) {\n      return;\n    }\n    this.handleToggle_();\n  };\n\n  /**\n   * Return `true` when the attribution is currently collapsed or `false`\n   * otherwise.\n   * @return {boolean} True if the widget is collapsed.\n   * @api\n   */\n  Attribution.prototype.getCollapsed = function getCollapsed () {\n    return this.collapsed_;\n  };\n\n  return Attribution;\n}(Control));\n\n\n/**\n * Update the attribution element.\n * @param {import(\"../MapEvent.js\").default} mapEvent Map event.\n * @this {Attribution}\n * @api\n */\nexport function render(mapEvent) {\n  this.updateElement_(mapEvent.frameState);\n}\n\n\nexport default Attribution;\n\n//# sourceMappingURL=Attribution.js.map","/**\n * @module ol/control/Rotate\n */\nimport Control from './Control.js';\nimport {CLASS_CONTROL, CLASS_HIDDEN, CLASS_UNSELECTABLE} from '../css.js';\nimport {easeOut} from '../easing.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-rotate'] CSS class name.\n * @property {string|HTMLElement} [label='⇧'] Text label to use for the rotate button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string} [tipLabel='Reset rotation'] Text label to use for the rotate tip.\n * @property {number} [duration=250] Animation duration in milliseconds.\n * @property {boolean} [autoHide=true] Hide the control when rotation is 0.\n * @property {function(import(\"../MapEvent.js\").default)} [render] Function called when the control should\n * be re-rendered. This is called in a `requestAnimationFrame` callback.\n * @property {function()} [resetNorth] Function called when the control is clicked.\n * This will override the default `resetNorth`.\n * @property {HTMLElement|string} [target] Specify a target if you want the control to be\n * rendered outside of the map's viewport.\n */\n\n\n/**\n * @classdesc\n * A button control to reset rotation to 0.\n * To style this control use css selector `.ol-rotate`. A `.ol-hidden` css\n * selector is added to the button when the rotation is 0.\n *\n * @api\n */\nvar Rotate = /*@__PURE__*/(function (Control) {\n  function Rotate(opt_options) {\n\n    var options = opt_options ? opt_options : {};\n\n    Control.call(this, {\n      element: document.createElement('div'),\n      render: options.render || render,\n      target: options.target\n    });\n\n    var className = options.className !== undefined ? options.className : 'ol-rotate';\n\n    var label = options.label !== undefined ? options.label : '\\u21E7';\n\n    /**\n     * @type {HTMLElement}\n     * @private\n     */\n    this.label_ = null;\n\n    if (typeof label === 'string') {\n      this.label_ = document.createElement('span');\n      this.label_.className = 'ol-compass';\n      this.label_.textContent = label;\n    } else {\n      this.label_ = label;\n      this.label_.classList.add('ol-compass');\n    }\n\n    var tipLabel = options.tipLabel ? options.tipLabel : 'Reset rotation';\n\n    var button = document.createElement('button');\n    button.className = className + '-reset';\n    button.setAttribute('type', 'button');\n    button.title = tipLabel;\n    button.appendChild(this.label_);\n\n    listen(button, EventType.CLICK, this.handleClick_, this);\n\n    var cssClasses = className + ' ' + CLASS_UNSELECTABLE + ' ' + CLASS_CONTROL;\n    var element = this.element;\n    element.className = cssClasses;\n    element.appendChild(button);\n\n    this.callResetNorth_ = options.resetNorth ? options.resetNorth : undefined;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.autoHide_ = options.autoHide !== undefined ? options.autoHide : true;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.rotation_ = undefined;\n\n    if (this.autoHide_) {\n      this.element.classList.add(CLASS_HIDDEN);\n    }\n\n  }\n\n  if ( Control ) Rotate.__proto__ = Control;\n  Rotate.prototype = Object.create( Control && Control.prototype );\n  Rotate.prototype.constructor = Rotate;\n\n  /**\n   * @param {MouseEvent} event The event to handle\n   * @private\n   */\n  Rotate.prototype.handleClick_ = function handleClick_ (event) {\n    event.preventDefault();\n    if (this.callResetNorth_ !== undefined) {\n      this.callResetNorth_();\n    } else {\n      this.resetNorth_();\n    }\n  };\n\n  /**\n   * @private\n   */\n  Rotate.prototype.resetNorth_ = function resetNorth_ () {\n    var map = this.getMap();\n    var view = map.getView();\n    if (!view) {\n      // the map does not have a view, so we can't act\n      // upon it\n      return;\n    }\n    if (view.getRotation() !== undefined) {\n      if (this.duration_ > 0) {\n        view.animate({\n          rotation: 0,\n          duration: this.duration_,\n          easing: easeOut\n        });\n      } else {\n        view.setRotation(0);\n      }\n    }\n  };\n\n  return Rotate;\n}(Control));\n\n\n/**\n * Update the rotate control element.\n * @param {import(\"../MapEvent.js\").default} mapEvent Map event.\n * @this {Rotate}\n * @api\n */\nexport function render(mapEvent) {\n  var frameState = mapEvent.frameState;\n  if (!frameState) {\n    return;\n  }\n  var rotation = frameState.viewState.rotation;\n  if (rotation != this.rotation_) {\n    var transform = 'rotate(' + rotation + 'rad)';\n    if (this.autoHide_) {\n      var contains = this.element.classList.contains(CLASS_HIDDEN);\n      if (!contains && rotation === 0) {\n        this.element.classList.add(CLASS_HIDDEN);\n      } else if (contains && rotation !== 0) {\n        this.element.classList.remove(CLASS_HIDDEN);\n      }\n    }\n    this.label_.style.msTransform = transform;\n    this.label_.style.webkitTransform = transform;\n    this.label_.style.transform = transform;\n  }\n  this.rotation_ = rotation;\n}\n\nexport default Rotate;\n\n//# sourceMappingURL=Rotate.js.map","/**\n * @module ol/control/Zoom\n */\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport Control from './Control.js';\nimport {CLASS_CONTROL, CLASS_UNSELECTABLE} from '../css.js';\nimport {easeOut} from '../easing.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=250] Animation duration in milliseconds.\n * @property {string} [className='ol-zoom'] CSS class name.\n * @property {string|HTMLElement} [zoomInLabel='+'] Text label to use for the zoom-in\n * button. Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string|HTMLElement} [zoomOutLabel='-'] Text label to use for the zoom-out button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string} [zoomInTipLabel='Zoom in'] Text label to use for the button tip.\n * @property {string} [zoomOutTipLabel='Zoom out'] Text label to use for the button tip.\n * @property {number} [delta=1] The zoom delta applied on each click.\n * @property {HTMLElement|string} [target] Specify a target if you want the control to be\n * rendered outside of the map's viewport.\n */\n\n\n/**\n * @classdesc\n * A control with 2 buttons, one for zoom in and one for zoom out.\n * This control is one of the default controls of a map. To style this control\n * use css selectors `.ol-zoom-in` and `.ol-zoom-out`.\n *\n * @api\n */\nvar Zoom = /*@__PURE__*/(function (Control) {\n  function Zoom(opt_options) {\n\n    var options = opt_options ? opt_options : {};\n\n    Control.call(this, {\n      element: document.createElement('div'),\n      target: options.target\n    });\n\n    var className = options.className !== undefined ? options.className : 'ol-zoom';\n\n    var delta = options.delta !== undefined ? options.delta : 1;\n\n    var zoomInLabel = options.zoomInLabel !== undefined ? options.zoomInLabel : '+';\n    var zoomOutLabel = options.zoomOutLabel !== undefined ? options.zoomOutLabel : '\\u2212';\n\n    var zoomInTipLabel = options.zoomInTipLabel !== undefined ?\n      options.zoomInTipLabel : 'Zoom in';\n    var zoomOutTipLabel = options.zoomOutTipLabel !== undefined ?\n      options.zoomOutTipLabel : 'Zoom out';\n\n    var inElement = document.createElement('button');\n    inElement.className = className + '-in';\n    inElement.setAttribute('type', 'button');\n    inElement.title = zoomInTipLabel;\n    inElement.appendChild(\n      typeof zoomInLabel === 'string' ? document.createTextNode(zoomInLabel) : zoomInLabel\n    );\n\n    listen(inElement, EventType.CLICK, this.handleClick_.bind(this, delta));\n\n    var outElement = document.createElement('button');\n    outElement.className = className + '-out';\n    outElement.setAttribute('type', 'button');\n    outElement.title = zoomOutTipLabel;\n    outElement.appendChild(\n      typeof zoomOutLabel === 'string' ? document.createTextNode(zoomOutLabel) : zoomOutLabel\n    );\n\n    listen(outElement, EventType.CLICK, this.handleClick_.bind(this, -delta));\n\n    var cssClasses = className + ' ' + CLASS_UNSELECTABLE + ' ' + CLASS_CONTROL;\n    var element = this.element;\n    element.className = cssClasses;\n    element.appendChild(inElement);\n    element.appendChild(outElement);\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n  }\n\n  if ( Control ) Zoom.__proto__ = Control;\n  Zoom.prototype = Object.create( Control && Control.prototype );\n  Zoom.prototype.constructor = Zoom;\n\n  /**\n   * @param {number} delta Zoom delta.\n   * @param {MouseEvent} event The event to handle\n   * @private\n   */\n  Zoom.prototype.handleClick_ = function handleClick_ (delta, event) {\n    event.preventDefault();\n    this.zoomByDelta_(delta);\n  };\n\n  /**\n   * @param {number} delta Zoom delta.\n   * @private\n   */\n  Zoom.prototype.zoomByDelta_ = function zoomByDelta_ (delta) {\n    var map = this.getMap();\n    var view = map.getView();\n    if (!view) {\n      // the map does not have a view, so we can't act\n      // upon it\n      return;\n    }\n    var currentResolution = view.getResolution();\n    if (currentResolution) {\n      var newResolution = view.constrainResolution(currentResolution, delta);\n      if (this.duration_ > 0) {\n        if (view.getAnimating()) {\n          view.cancelAnimations();\n        }\n        view.animate({\n          resolution: newResolution,\n          duration: this.duration_,\n          easing: easeOut\n        });\n      } else {\n        view.setResolution(newResolution);\n      }\n    }\n  };\n\n  return Zoom;\n}(Control));\n\n\nexport default Zoom;\n\n//# sourceMappingURL=Zoom.js.map","/**\n * @module ol/control/util\n */\nimport Collection from '../Collection.js';\nimport Attribution from './Attribution.js';\nimport Rotate from './Rotate.js';\nimport Zoom from './Zoom.js';\n\n\n/**\n * @typedef {Object} DefaultsOptions\n * @property {boolean} [attribution=true] Include\n * {@link module:ol/control/Attribution~Attribution}.\n * @property {import(\"./Attribution.js\").Options} [attributionOptions]\n * Options for {@link module:ol/control/Attribution~Attribution}.\n * @property {boolean} [rotate=true] Include\n * {@link module:ol/control/Rotate~Rotate}.\n * @property {import(\"./Rotate.js\").Options} [rotateOptions] Options\n * for {@link module:ol/control/Rotate~Rotate}.\n * @property {boolean} [zoom] Include {@link module:ol/control/Zoom~Zoom}.\n * @property {import(\"./Zoom.js\").Options} [zoomOptions] Options for\n * {@link module:ol/control/Zoom~Zoom}.\n * @api\n */\n\n\n/**\n * Set of controls included in maps by default. Unless configured otherwise,\n * this returns a collection containing an instance of each of the following\n * controls:\n * * {@link module:ol/control/Zoom~Zoom}\n * * {@link module:ol/control/Rotate~Rotate}\n * * {@link module:ol/control/Attribution~Attribution}\n *\n * @param {DefaultsOptions=} opt_options\n * Defaults options.\n * @return {Collection<import(\"./Control.js\").default>}\n * Controls.\n * @function module:ol/control.defaults\n * @api\n */\nexport function defaults(opt_options) {\n\n  var options = opt_options ? opt_options : {};\n\n  var controls = new Collection();\n\n  var zoomControl = options.zoom !== undefined ? options.zoom : true;\n  if (zoomControl) {\n    controls.push(new Zoom(options.zoomOptions));\n  }\n\n  var rotateControl = options.rotate !== undefined ? options.rotate : true;\n  if (rotateControl) {\n    controls.push(new Rotate(options.rotateOptions));\n  }\n\n  var attributionControl = options.attribution !== undefined ?\n    options.attribution : true;\n  if (attributionControl) {\n    controls.push(new Attribution(options.attributionOptions));\n  }\n\n  return controls;\n}\n\n//# sourceMappingURL=util.js.map","/**\n * @module ol/Kinetic\n */\n\n/**\n * @classdesc\n * Implementation of inertial deceleration for map movement.\n *\n * @api\n */\nvar Kinetic = function Kinetic(decay, minVelocity, delay) {\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.decay_ = decay;\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.minVelocity_ = minVelocity;\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.delay_ = delay;\n\n  /**\n   * @private\n   * @type {Array<number>}\n   */\n  this.points_ = [];\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.angle_ = 0;\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.initialVelocity_ = 0;\n};\n\n/**\n * FIXME empty description for jsdoc\n */\nKinetic.prototype.begin = function begin () {\n  this.points_.length = 0;\n  this.angle_ = 0;\n  this.initialVelocity_ = 0;\n};\n\n/**\n * @param {number} x X.\n * @param {number} y Y.\n */\nKinetic.prototype.update = function update (x, y) {\n  this.points_.push(x, y, Date.now());\n};\n\n/**\n * @return {boolean} Whether we should do kinetic animation.\n */\nKinetic.prototype.end = function end () {\n  if (this.points_.length < 6) {\n    // at least 2 points are required (i.e. there must be at least 6 elements\n    // in the array)\n    return false;\n  }\n  var delay = Date.now() - this.delay_;\n  var lastIndex = this.points_.length - 3;\n  if (this.points_[lastIndex + 2] < delay) {\n    // the last tracked point is too old, which means that the user stopped\n    // panning before releasing the map\n    return false;\n  }\n\n  // get the first point which still falls into the delay time\n  var firstIndex = lastIndex - 3;\n  while (firstIndex > 0 && this.points_[firstIndex + 2] > delay) {\n    firstIndex -= 3;\n  }\n\n  var duration = this.points_[lastIndex + 2] - this.points_[firstIndex + 2];\n  // we don't want a duration of 0 (divide by zero)\n  // we also make sure the user panned for a duration of at least one frame\n  // (1/60s) to compute sane displacement values\n  if (duration < 1000 / 60) {\n    return false;\n  }\n\n  var dx = this.points_[lastIndex] - this.points_[firstIndex];\n  var dy = this.points_[lastIndex + 1] - this.points_[firstIndex + 1];\n  this.angle_ = Math.atan2(dy, dx);\n  this.initialVelocity_ = Math.sqrt(dx * dx + dy * dy) / duration;\n  return this.initialVelocity_ > this.minVelocity_;\n};\n\n/**\n * @return {number} Total distance travelled (pixels).\n */\nKinetic.prototype.getDistance = function getDistance () {\n  return (this.minVelocity_ - this.initialVelocity_) / this.decay_;\n};\n\n/**\n * @return {number} Angle of the kinetic panning animation (radians).\n */\nKinetic.prototype.getAngle = function getAngle () {\n  return this.angle_;\n};\n\nexport default Kinetic;\n\n//# sourceMappingURL=Kinetic.js.map","/**\n * @module ol/interaction/Property\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  ACTIVE: 'active'\n};\n\n//# sourceMappingURL=Property.js.map","/**\n * @module ol/interaction/Interaction\n */\nimport BaseObject from '../Object.js';\nimport {easeOut, linear} from '../easing.js';\nimport InteractionProperty from './Property.js';\nimport {clamp} from '../math.js';\n\n\n/**\n * Object literal with config options for interactions.\n * @typedef {Object} InteractionOptions\n * @property {function(import(\"../MapBrowserEvent.js\").default):boolean} handleEvent\n * Method called by the map to notify the interaction that a browser event was\n * dispatched to the map. If the function returns a falsy value, propagation of\n * the event to other interactions in the map's interactions chain will be\n * prevented (this includes functions with no explicit return).\n */\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * User actions that change the state of the map. Some are similar to controls,\n * but are not associated with a DOM element.\n * For example, {@link module:ol/interaction/KeyboardZoom~KeyboardZoom} is\n * functionally the same as {@link module:ol/control/Zoom~Zoom}, but triggered\n * by a keyboard event not a button element event.\n * Although interactions do not have a DOM element, some of them do render\n * vectors and so are visible on the screen.\n * @api\n */\nvar Interaction = /*@__PURE__*/(function (BaseObject) {\n  function Interaction(options) {\n    BaseObject.call(this);\n\n    if (options.handleEvent) {\n      this.handleEvent = options.handleEvent;\n    }\n\n    /**\n     * @private\n     * @type {import(\"../PluggableMap.js\").default}\n     */\n    this.map_ = null;\n\n    this.setActive(true);\n  }\n\n  if ( BaseObject ) Interaction.__proto__ = BaseObject;\n  Interaction.prototype = Object.create( BaseObject && BaseObject.prototype );\n  Interaction.prototype.constructor = Interaction;\n\n  /**\n   * Return whether the interaction is currently active.\n   * @return {boolean} `true` if the interaction is active, `false` otherwise.\n   * @observable\n   * @api\n   */\n  Interaction.prototype.getActive = function getActive () {\n    return /** @type {boolean} */ (this.get(InteractionProperty.ACTIVE));\n  };\n\n  /**\n   * Get the map associated with this interaction.\n   * @return {import(\"../PluggableMap.js\").default} Map.\n   * @api\n   */\n  Interaction.prototype.getMap = function getMap () {\n    return this.map_;\n  };\n\n  /**\n   * Handles the {@link module:ol/MapBrowserEvent map browser event}.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n   * @return {boolean} `false` to stop event propagation.\n   * @api\n   */\n  Interaction.prototype.handleEvent = function handleEvent (mapBrowserEvent) {\n    return true;\n  };\n\n  /**\n   * Activate or deactivate the interaction.\n   * @param {boolean} active Active.\n   * @observable\n   * @api\n   */\n  Interaction.prototype.setActive = function setActive (active) {\n    this.set(InteractionProperty.ACTIVE, active);\n  };\n\n  /**\n   * Remove the interaction from its current map and attach it to the new map.\n   * Subclasses may set up event handlers to get notified about changes to\n   * the map here.\n   * @param {import(\"../PluggableMap.js\").default} map Map.\n   */\n  Interaction.prototype.setMap = function setMap (map) {\n    this.map_ = map;\n  };\n\n  return Interaction;\n}(BaseObject));\n\n\n/**\n * @param {import(\"../View.js\").default} view View.\n * @param {import(\"../coordinate.js\").Coordinate} delta Delta.\n * @param {number=} opt_duration Duration.\n */\nexport function pan(view, delta, opt_duration) {\n  var currentCenter = view.getCenter();\n  if (currentCenter) {\n    var center = view.constrainCenter(\n      [currentCenter[0] + delta[0], currentCenter[1] + delta[1]]);\n    if (opt_duration) {\n      view.animate({\n        duration: opt_duration,\n        easing: linear,\n        center: center\n      });\n    } else {\n      view.setCenter(center);\n    }\n  }\n}\n\n\n/**\n * @param {import(\"../View.js\").default} view View.\n * @param {number|undefined} rotation Rotation.\n * @param {import(\"../coordinate.js\").Coordinate=} opt_anchor Anchor coordinate.\n * @param {number=} opt_duration Duration.\n */\nexport function rotate(view, rotation, opt_anchor, opt_duration) {\n  rotation = view.constrainRotation(rotation, 0);\n  rotateWithoutConstraints(view, rotation, opt_anchor, opt_duration);\n}\n\n\n/**\n * @param {import(\"../View.js\").default} view View.\n * @param {number|undefined} rotation Rotation.\n * @param {import(\"../coordinate.js\").Coordinate=} opt_anchor Anchor coordinate.\n * @param {number=} opt_duration Duration.\n */\nexport function rotateWithoutConstraints(view, rotation, opt_anchor, opt_duration) {\n  if (rotation !== undefined) {\n    var currentRotation = view.getRotation();\n    var currentCenter = view.getCenter();\n    if (currentRotation !== undefined && currentCenter && opt_duration > 0) {\n      view.animate({\n        rotation: rotation,\n        anchor: opt_anchor,\n        duration: opt_duration,\n        easing: easeOut\n      });\n    } else {\n      view.rotate(rotation, opt_anchor);\n    }\n  }\n}\n\n\n/**\n * @param {import(\"../View.js\").default} view View.\n * @param {number|undefined} resolution Resolution to go to.\n * @param {import(\"../coordinate.js\").Coordinate=} opt_anchor Anchor coordinate.\n * @param {number=} opt_duration Duration.\n * @param {number=} opt_direction Zooming direction; > 0 indicates\n *     zooming out, in which case the constraints system will select\n *     the largest nearest resolution; < 0 indicates zooming in, in\n *     which case the constraints system will select the smallest\n *     nearest resolution; == 0 indicates that the zooming direction\n *     is unknown/not relevant, in which case the constraints system\n *     will select the nearest resolution. If not defined 0 is\n *     assumed.\n */\nexport function zoom(view, resolution, opt_anchor, opt_duration, opt_direction) {\n  resolution = view.constrainResolution(resolution, 0, opt_direction);\n  zoomWithoutConstraints(view, resolution, opt_anchor, opt_duration);\n}\n\n\n/**\n * @param {import(\"../View.js\").default} view View.\n * @param {number} delta Delta from previous zoom level.\n * @param {import(\"../coordinate.js\").Coordinate=} opt_anchor Anchor coordinate.\n * @param {number=} opt_duration Duration.\n */\nexport function zoomByDelta(view, delta, opt_anchor, opt_duration) {\n  var currentResolution = view.getResolution();\n  var resolution = view.constrainResolution(currentResolution, delta, 0);\n\n  if (resolution !== undefined) {\n    var resolutions = view.getResolutions();\n    resolution = clamp(\n      resolution,\n      view.getMinResolution() || resolutions[resolutions.length - 1],\n      view.getMaxResolution() || resolutions[0]);\n  }\n\n  // If we have a constraint on center, we need to change the anchor so that the\n  // new center is within the extent. We first calculate the new center, apply\n  // the constraint to it, and then calculate back the anchor\n  if (opt_anchor && resolution !== undefined && resolution !== currentResolution) {\n    var currentCenter = view.getCenter();\n    var center = view.calculateCenterZoom(resolution, opt_anchor);\n    center = view.constrainCenter(center);\n\n    opt_anchor = [\n      (resolution * currentCenter[0] - currentResolution * center[0]) /\n          (resolution - currentResolution),\n      (resolution * currentCenter[1] - currentResolution * center[1]) /\n          (resolution - currentResolution)\n    ];\n  }\n\n  zoomWithoutConstraints(view, resolution, opt_anchor, opt_duration);\n}\n\n\n/**\n * @param {import(\"../View.js\").default} view View.\n * @param {number|undefined} resolution Resolution to go to.\n * @param {import(\"../coordinate.js\").Coordinate=} opt_anchor Anchor coordinate.\n * @param {number=} opt_duration Duration.\n */\nexport function zoomWithoutConstraints(view, resolution, opt_anchor, opt_duration) {\n  if (resolution) {\n    var currentResolution = view.getResolution();\n    var currentCenter = view.getCenter();\n    if (currentResolution !== undefined && currentCenter &&\n        resolution !== currentResolution && opt_duration) {\n      view.animate({\n        resolution: resolution,\n        anchor: opt_anchor,\n        duration: opt_duration,\n        easing: easeOut\n      });\n    } else {\n      if (opt_anchor) {\n        var center = view.calculateCenterZoom(resolution, opt_anchor);\n        view.setCenter(center);\n      }\n      view.setResolution(resolution);\n    }\n  }\n}\n\nexport default Interaction;\n\n//# sourceMappingURL=Interaction.js.map","/**\n * @module ol/interaction/DoubleClickZoom\n */\nimport MapBrowserEventType from '../MapBrowserEventType.js';\nimport Interaction, {zoomByDelta} from './Interaction.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=250] Animation duration in milliseconds.\n * @property {number} [delta=1] The zoom delta applied on each double click.\n */\n\n\n/**\n * @classdesc\n * Allows the user to zoom by double-clicking on the map.\n * @api\n */\nvar DoubleClickZoom = /*@__PURE__*/(function (Interaction) {\n  function DoubleClickZoom(opt_options) {\n    Interaction.call(this, {\n      handleEvent: handleEvent\n    });\n\n    var options = opt_options ? opt_options : {};\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.delta_ = options.delta ? options.delta : 1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n  }\n\n  if ( Interaction ) DoubleClickZoom.__proto__ = Interaction;\n  DoubleClickZoom.prototype = Object.create( Interaction && Interaction.prototype );\n  DoubleClickZoom.prototype.constructor = DoubleClickZoom;\n\n  return DoubleClickZoom;\n}(Interaction));\n\n\n/**\n * Handles the {@link module:ol/MapBrowserEvent map browser event} (if it was a\n * doubleclick) and eventually zooms the map.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} `false` to stop event propagation.\n * @this {DoubleClickZoom}\n */\nfunction handleEvent(mapBrowserEvent) {\n  var stopEvent = false;\n  if (mapBrowserEvent.type == MapBrowserEventType.DBLCLICK) {\n    var browserEvent = /** @type {MouseEvent} */ (mapBrowserEvent.originalEvent);\n    var map = mapBrowserEvent.map;\n    var anchor = mapBrowserEvent.coordinate;\n    var delta = browserEvent.shiftKey ? -this.delta_ : this.delta_;\n    var view = map.getView();\n    zoomByDelta(view, delta, anchor, this.duration_);\n    mapBrowserEvent.preventDefault();\n    stopEvent = true;\n  }\n  return !stopEvent;\n}\n\nexport default DoubleClickZoom;\n\n//# sourceMappingURL=DoubleClickZoom.js.map","/**\n * @module ol/events/condition\n */\nimport MapBrowserEventType from '../MapBrowserEventType.js';\nimport {assert} from '../asserts.js';\nimport {TRUE, FALSE} from '../functions.js';\nimport {WEBKIT, MAC} from '../has.js';\n\n\n/**\n * A function that takes an {@link module:ol/MapBrowserEvent} and returns a\n * `{boolean}`. If the condition is met, true should be returned.\n *\n * @typedef {function(this: ?, import(\"../MapBrowserEvent.js\").default): boolean} Condition\n */\n\n\n/**\n * Return `true` if only the alt-key is pressed, `false` otherwise (e.g. when\n * additionally the shift-key is pressed).\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if only the alt key is pressed.\n * @api\n */\nexport var altKeyOnly = function(mapBrowserEvent) {\n  var originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (mapBrowserEvent.originalEvent);\n  return (\n    originalEvent.altKey &&\n      !(originalEvent.metaKey || originalEvent.ctrlKey) &&\n      !originalEvent.shiftKey);\n};\n\n\n/**\n * Return `true` if only the alt-key and shift-key is pressed, `false` otherwise\n * (e.g. when additionally the platform-modifier-key is pressed).\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if only the alt and shift keys are pressed.\n * @api\n */\nexport var altShiftKeysOnly = function(mapBrowserEvent) {\n  var originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (mapBrowserEvent.originalEvent);\n  return (\n    originalEvent.altKey &&\n      !(originalEvent.metaKey || originalEvent.ctrlKey) &&\n      originalEvent.shiftKey);\n};\n\n\n/**\n * Return `true` if the map has the focus. This condition requires a map target\n * element with a `tabindex` attribute, e.g. `<div id=\"map\" tabindex=\"1\">`.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} event Map browser event.\n * @return {boolean} The map has the focus.\n * @api\n */\nexport var focus = function(event) {\n  return event.target.getTargetElement() === document.activeElement;\n};\n\n\n/**\n * Return always true.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True.\n * @api\n */\nexport var always = TRUE;\n\n\n/**\n * Return `true` if the event is a `click` event, `false` otherwise.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event is a map `click` event.\n * @api\n */\nexport var click = function(mapBrowserEvent) {\n  return mapBrowserEvent.type == MapBrowserEventType.CLICK;\n};\n\n\n/**\n * Return `true` if the event has an \"action\"-producing mouse button.\n *\n * By definition, this includes left-click on windows/linux, and left-click\n * without the ctrl key on Macs.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} The result.\n */\nexport var mouseActionButton = function(mapBrowserEvent) {\n  var originalEvent = /** @type {MouseEvent} */ (mapBrowserEvent.originalEvent);\n  return originalEvent.button == 0 &&\n      !(WEBKIT && MAC && originalEvent.ctrlKey);\n};\n\n\n/**\n * Return always false.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} False.\n * @api\n */\nexport var never = FALSE;\n\n\n/**\n * Return `true` if the browser event is a `pointermove` event, `false`\n * otherwise.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the browser event is a `pointermove` event.\n * @api\n */\nexport var pointerMove = function(mapBrowserEvent) {\n  return mapBrowserEvent.type == 'pointermove';\n};\n\n\n/**\n * Return `true` if the event is a map `singleclick` event, `false` otherwise.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event is a map `singleclick` event.\n * @api\n */\nexport var singleClick = function(mapBrowserEvent) {\n  return mapBrowserEvent.type == MapBrowserEventType.SINGLECLICK;\n};\n\n\n/**\n * Return `true` if the event is a map `dblclick` event, `false` otherwise.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event is a map `dblclick` event.\n * @api\n */\nexport var doubleClick = function(mapBrowserEvent) {\n  return mapBrowserEvent.type == MapBrowserEventType.DBLCLICK;\n};\n\n\n/**\n * Return `true` if no modifier key (alt-, shift- or platform-modifier-key) is\n * pressed.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True only if there no modifier keys are pressed.\n * @api\n */\nexport var noModifierKeys = function(mapBrowserEvent) {\n  var originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (mapBrowserEvent.originalEvent);\n  return (\n    !originalEvent.altKey &&\n      !(originalEvent.metaKey || originalEvent.ctrlKey) &&\n      !originalEvent.shiftKey);\n};\n\n\n/**\n * Return `true` if only the platform-modifier-key (the meta-key on Mac,\n * ctrl-key otherwise) is pressed, `false` otherwise (e.g. when additionally\n * the shift-key is pressed).\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if only the platform modifier key is pressed.\n * @api\n */\nexport var platformModifierKeyOnly = function(mapBrowserEvent) {\n  var originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (mapBrowserEvent.originalEvent);\n  return !originalEvent.altKey &&\n    (MAC ? originalEvent.metaKey : originalEvent.ctrlKey) &&\n    !originalEvent.shiftKey;\n};\n\n\n/**\n * Return `true` if only the shift-key is pressed, `false` otherwise (e.g. when\n * additionally the alt-key is pressed).\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if only the shift key is pressed.\n * @api\n */\nexport var shiftKeyOnly = function(mapBrowserEvent) {\n  var originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (mapBrowserEvent.originalEvent);\n  return (\n    !originalEvent.altKey &&\n      !(originalEvent.metaKey || originalEvent.ctrlKey) &&\n      originalEvent.shiftKey);\n};\n\n\n/**\n * Return `true` if the target element is not editable, i.e. not a `<input>`-,\n * `<select>`- or `<textarea>`-element, `false` otherwise.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True only if the target element is not editable.\n * @api\n */\nexport var targetNotEditable = function(mapBrowserEvent) {\n  var target = mapBrowserEvent.originalEvent.target;\n  var tagName = /** @type {Element} */ (target).tagName;\n  return (\n    tagName !== 'INPUT' &&\n      tagName !== 'SELECT' &&\n      tagName !== 'TEXTAREA');\n};\n\n\n/**\n * Return `true` if the event originates from a mouse device.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event originates from a mouse device.\n * @api\n */\nexport var mouseOnly = function(mapBrowserEvent) {\n  var pointerEvent = /** @type {import(\"../MapBrowserPointerEvent\").default} */ (mapBrowserEvent).pointerEvent;\n  assert(pointerEvent !== undefined, 56); // mapBrowserEvent must originate from a pointer event\n  // see http://www.w3.org/TR/pointerevents/#widl-PointerEvent-pointerType\n  return pointerEvent.pointerType == 'mouse';\n};\n\n\n/**\n * Return `true` if the event originates from a primary pointer in\n * contact with the surface or if the left mouse button is pressed.\n * See http://www.w3.org/TR/pointerevents/#button-states.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event originates from a primary pointer.\n * @api\n */\nexport var primaryAction = function(mapBrowserEvent) {\n  var pointerEvent = /** @type {import(\"../MapBrowserPointerEvent\").default} */ (mapBrowserEvent).pointerEvent;\n  assert(pointerEvent !== undefined, 56); // mapBrowserEvent must originate from a pointer event\n  return pointerEvent.isPrimary && pointerEvent.button === 0;\n};\n\n//# sourceMappingURL=condition.js.map","/**\n * @module ol/interaction/Pointer\n */\nimport MapBrowserEventType from '../MapBrowserEventType.js';\nimport Interaction from './Interaction.js';\nimport {getValues} from '../obj.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {function(import(\"../MapBrowserPointerEvent.js\").default):boolean} [handleDownEvent]\n * Function handling \"down\" events. If the function returns `true` then a drag\n * sequence is started.\n * @property {function(import(\"../MapBrowserPointerEvent.js\").default)} [handleDragEvent]\n * Function handling \"drag\" events. This function is called on \"move\" events\n * during a drag sequence.\n * @property {function(import(\"../MapBrowserEvent.js\").default):boolean} [handleEvent]\n * Method called by the map to notify the interaction that a browser event was\n * dispatched to the map. The function may return `false` to prevent the\n * propagation of the event to other interactions in the map's interactions\n * chain.\n * @property {function(import(\"../MapBrowserPointerEvent.js\").default)} [handleMoveEvent]\n * Function handling \"move\" events. This function is called on \"move\" events,\n * also during a drag sequence (so during a drag sequence both the\n * `handleDragEvent` function and this function are called).\n * @property {function(import(\"../MapBrowserPointerEvent.js\").default):boolean} [handleUpEvent]\n *  Function handling \"up\" events. If the function returns `false` then the\n * current drag sequence is stopped.\n * @property {function(boolean):boolean} [stopDown]\n * Should the down event be propagated to other interactions, or should be\n * stopped?\n */\n\n\n/**\n * @classdesc\n * Base class that calls user-defined functions on `down`, `move` and `up`\n * events. This class also manages \"drag sequences\".\n *\n * When the `handleDownEvent` user function returns `true` a drag sequence is\n * started. During a drag sequence the `handleDragEvent` user function is\n * called on `move` events. The drag sequence ends when the `handleUpEvent`\n * user function is called and returns `false`.\n * @api\n */\nvar PointerInteraction = /*@__PURE__*/(function (Interaction) {\n  function PointerInteraction(opt_options) {\n\n    var options = opt_options ? opt_options : {};\n\n    Interaction.call(/** @type {import(\"./Interaction.js\").InteractionOptions} */ this, (options));\n\n    if (options.handleDownEvent) {\n      this.handleDownEvent = options.handleDownEvent;\n    }\n\n    if (options.handleDragEvent) {\n      this.handleDragEvent = options.handleDragEvent;\n    }\n\n    if (options.handleMoveEvent) {\n      this.handleMoveEvent = options.handleMoveEvent;\n    }\n\n    if (options.handleUpEvent) {\n      this.handleUpEvent = options.handleUpEvent;\n    }\n\n    if (options.stopDown) {\n      this.stopDown = options.stopDown;\n    }\n\n    /**\n     * @type {boolean}\n     * @protected\n     */\n    this.handlingDownUpSequence = false;\n\n    /**\n     * @type {!Object<string, import(\"../pointer/PointerEvent.js\").default>}\n     * @private\n     */\n    this.trackedPointers_ = {};\n\n    /**\n     * @type {Array<import(\"../pointer/PointerEvent.js\").default>}\n     * @protected\n     */\n    this.targetPointers = [];\n\n  }\n\n  if ( Interaction ) PointerInteraction.__proto__ = Interaction;\n  PointerInteraction.prototype = Object.create( Interaction && Interaction.prototype );\n  PointerInteraction.prototype.constructor = PointerInteraction;\n\n  /**\n   * Handle pointer down events.\n   * @param {import(\"../MapBrowserPointerEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   * @protected\n   */\n  PointerInteraction.prototype.handleDownEvent = function handleDownEvent (mapBrowserEvent) {\n    return false;\n  };\n\n  /**\n   * Handle pointer drag events.\n   * @param {import(\"../MapBrowserPointerEvent.js\").default} mapBrowserEvent Event.\n   * @protected\n   */\n  PointerInteraction.prototype.handleDragEvent = function handleDragEvent (mapBrowserEvent) {};\n\n  /**\n   * Handles the {@link module:ol/MapBrowserEvent map browser event} and may call into\n   * other functions, if event sequences like e.g. 'drag' or 'down-up' etc. are\n   * detected.\n   * @override\n   * @api\n   */\n  PointerInteraction.prototype.handleEvent = function handleEvent (mapBrowserEvent) {\n    if (!(/** @type {import(\"../MapBrowserPointerEvent.js\").default} */ (mapBrowserEvent).pointerEvent)) {\n      return true;\n    }\n\n    var stopEvent = false;\n    this.updateTrackedPointers_(mapBrowserEvent);\n    if (this.handlingDownUpSequence) {\n      if (mapBrowserEvent.type == MapBrowserEventType.POINTERDRAG) {\n        this.handleDragEvent(mapBrowserEvent);\n      } else if (mapBrowserEvent.type == MapBrowserEventType.POINTERUP) {\n        var handledUp = this.handleUpEvent(mapBrowserEvent);\n        this.handlingDownUpSequence = handledUp && this.targetPointers.length > 0;\n      }\n    } else {\n      if (mapBrowserEvent.type == MapBrowserEventType.POINTERDOWN) {\n        var handled = this.handleDownEvent(mapBrowserEvent);\n        if (handled) {\n          mapBrowserEvent.preventDefault();\n        }\n        this.handlingDownUpSequence = handled;\n        stopEvent = this.stopDown(handled);\n      } else if (mapBrowserEvent.type == MapBrowserEventType.POINTERMOVE) {\n        this.handleMoveEvent(mapBrowserEvent);\n      }\n    }\n    return !stopEvent;\n  };\n\n  /**\n   * Handle pointer move events.\n   * @param {import(\"../MapBrowserPointerEvent.js\").default} mapBrowserEvent Event.\n   * @protected\n   */\n  PointerInteraction.prototype.handleMoveEvent = function handleMoveEvent (mapBrowserEvent) {};\n\n  /**\n   * Handle pointer up events.\n   * @param {import(\"../MapBrowserPointerEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   * @protected\n   */\n  PointerInteraction.prototype.handleUpEvent = function handleUpEvent (mapBrowserEvent) {\n    return false;\n  };\n\n  /**\n   * This function is used to determine if \"down\" events should be propagated\n   * to other interactions or should be stopped.\n   * @param {boolean} handled Was the event handled by the interaction?\n   * @return {boolean} Should the `down` event be stopped?\n   */\n  PointerInteraction.prototype.stopDown = function stopDown (handled) {\n    return handled;\n  };\n\n  /**\n   * @param {import(\"../MapBrowserPointerEvent.js\").default} mapBrowserEvent Event.\n   * @private\n   */\n  PointerInteraction.prototype.updateTrackedPointers_ = function updateTrackedPointers_ (mapBrowserEvent) {\n    if (isPointerDraggingEvent(mapBrowserEvent)) {\n      var event = mapBrowserEvent.pointerEvent;\n\n      var id = event.pointerId.toString();\n      if (mapBrowserEvent.type == MapBrowserEventType.POINTERUP) {\n        delete this.trackedPointers_[id];\n      } else if (mapBrowserEvent.type ==\n          MapBrowserEventType.POINTERDOWN) {\n        this.trackedPointers_[id] = event;\n      } else if (id in this.trackedPointers_) {\n        // update only when there was a pointerdown event for this pointer\n        this.trackedPointers_[id] = event;\n      }\n      this.targetPointers = getValues(this.trackedPointers_);\n    }\n  };\n\n  return PointerInteraction;\n}(Interaction));\n\n\n/**\n * @param {Array<import(\"../pointer/PointerEvent.js\").default>} pointerEvents List of events.\n * @return {import(\"../pixel.js\").Pixel} Centroid pixel.\n */\nexport function centroid(pointerEvents) {\n  var length = pointerEvents.length;\n  var clientX = 0;\n  var clientY = 0;\n  for (var i = 0; i < length; i++) {\n    clientX += pointerEvents[i].clientX;\n    clientY += pointerEvents[i].clientY;\n  }\n  return [clientX / length, clientY / length];\n}\n\n\n/**\n * @param {import(\"../MapBrowserPointerEvent.js\").default} mapBrowserEvent Event.\n * @return {boolean} Whether the event is a pointerdown, pointerdrag\n *     or pointerup event.\n */\nfunction isPointerDraggingEvent(mapBrowserEvent) {\n  var type = mapBrowserEvent.type;\n  return type === MapBrowserEventType.POINTERDOWN ||\n    type === MapBrowserEventType.POINTERDRAG ||\n    type === MapBrowserEventType.POINTERUP;\n}\n\n\nexport default PointerInteraction;\n\n//# sourceMappingURL=Pointer.js.map","/**\n * @module ol/interaction/DragPan\n */\nimport ViewHint from '../ViewHint.js';\nimport {scale as scaleCoordinate, rotate as rotateCoordinate, add as addCoordinate} from '../coordinate.js';\nimport {easeOut} from '../easing.js';\nimport {noModifierKeys} from '../events/condition.js';\nimport {FALSE} from '../functions.js';\nimport PointerInteraction, {centroid as centroidFromPointers} from './Pointer.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a boolean\n * to indicate whether that event should be handled.\n * Default is {@link module:ol/events/condition~noModifierKeys}.\n * @property {import(\"../Kinetic.js\").default} [kinetic] Kinetic inertia to apply to the pan.\n */\n\n\n/**\n * @classdesc\n * Allows the user to pan the map by dragging the map.\n * @api\n */\nvar DragPan = /*@__PURE__*/(function (PointerInteraction) {\n  function DragPan(opt_options) {\n\n    PointerInteraction.call(this, {\n      stopDown: FALSE\n    });\n\n    var options = opt_options ? opt_options : {};\n\n    /**\n     * @private\n     * @type {import(\"../Kinetic.js\").default|undefined}\n     */\n    this.kinetic_ = options.kinetic;\n\n    /**\n     * @type {import(\"../pixel.js\").Pixel}\n     */\n    this.lastCentroid = null;\n\n    /**\n     * @type {number}\n     */\n    this.lastPointersCount_;\n\n    /**\n     * @type {boolean}\n     */\n    this.panning_ = false;\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.condition ? options.condition : noModifierKeys;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.noKinetic_ = false;\n\n  }\n\n  if ( PointerInteraction ) DragPan.__proto__ = PointerInteraction;\n  DragPan.prototype = Object.create( PointerInteraction && PointerInteraction.prototype );\n  DragPan.prototype.constructor = DragPan;\n\n  /**\n   * @inheritDoc\n   */\n  DragPan.prototype.handleDragEvent = function handleDragEvent (mapBrowserEvent) {\n    if (!this.panning_) {\n      this.panning_ = true;\n      this.getMap().getView().setHint(ViewHint.INTERACTING, 1);\n    }\n    var targetPointers = this.targetPointers;\n    var centroid = centroidFromPointers(targetPointers);\n    if (targetPointers.length == this.lastPointersCount_) {\n      if (this.kinetic_) {\n        this.kinetic_.update(centroid[0], centroid[1]);\n      }\n      if (this.lastCentroid) {\n        var deltaX = this.lastCentroid[0] - centroid[0];\n        var deltaY = centroid[1] - this.lastCentroid[1];\n        var map = mapBrowserEvent.map;\n        var view = map.getView();\n        var center = [deltaX, deltaY];\n        scaleCoordinate(center, view.getResolution());\n        rotateCoordinate(center, view.getRotation());\n        addCoordinate(center, view.getCenter());\n        center = view.constrainCenter(center);\n        view.setCenter(center);\n      }\n    } else if (this.kinetic_) {\n      // reset so we don't overestimate the kinetic energy after\n      // after one finger down, tiny drag, second finger down\n      this.kinetic_.begin();\n    }\n    this.lastCentroid = centroid;\n    this.lastPointersCount_ = targetPointers.length;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  DragPan.prototype.handleUpEvent = function handleUpEvent (mapBrowserEvent) {\n    var map = mapBrowserEvent.map;\n    var view = map.getView();\n    if (this.targetPointers.length === 0) {\n      if (!this.noKinetic_ && this.kinetic_ && this.kinetic_.end()) {\n        var distance = this.kinetic_.getDistance();\n        var angle = this.kinetic_.getAngle();\n        var center = /** @type {!import(\"../coordinate.js\").Coordinate} */ (view.getCenter());\n        var centerpx = map.getPixelFromCoordinate(center);\n        var dest = map.getCoordinateFromPixel([\n          centerpx[0] - distance * Math.cos(angle),\n          centerpx[1] - distance * Math.sin(angle)\n        ]);\n        view.animate({\n          center: view.constrainCenter(dest),\n          duration: 500,\n          easing: easeOut\n        });\n      }\n      if (this.panning_) {\n        this.panning_ = false;\n        view.setHint(ViewHint.INTERACTING, -1);\n      }\n      return false;\n    } else {\n      if (this.kinetic_) {\n        // reset so we don't overestimate the kinetic energy after\n        // after one finger up, tiny drag, second finger up\n        this.kinetic_.begin();\n      }\n      this.lastCentroid = null;\n      return true;\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  DragPan.prototype.handleDownEvent = function handleDownEvent (mapBrowserEvent) {\n    if (this.targetPointers.length > 0 && this.condition_(mapBrowserEvent)) {\n      var map = mapBrowserEvent.map;\n      var view = map.getView();\n      this.lastCentroid = null;\n      // stop any current animation\n      if (view.getAnimating()) {\n        view.setCenter(mapBrowserEvent.frameState.viewState.center);\n      }\n      if (this.kinetic_) {\n        this.kinetic_.begin();\n      }\n      // No kinetic as soon as more than one pointer on the screen is\n      // detected. This is to prevent nasty pans after pinch.\n      this.noKinetic_ = this.targetPointers.length > 1;\n      return true;\n    } else {\n      return false;\n    }\n  };\n\n  return DragPan;\n}(PointerInteraction));\n\nexport default DragPan;\n\n//# sourceMappingURL=DragPan.js.map","/**\n * @module ol/interaction/DragRotate\n */\nimport {disable} from '../rotationconstraint.js';\nimport ViewHint from '../ViewHint.js';\nimport {altShiftKeysOnly, mouseOnly, mouseActionButton} from '../events/condition.js';\nimport {FALSE} from '../functions.js';\nimport {rotate, rotateWithoutConstraints} from './Interaction.js';\nimport PointerInteraction from './Pointer.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that takes an\n * {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a boolean\n * to indicate whether that event should be handled.\n * Default is {@link module:ol/events/condition~altShiftKeysOnly}.\n * @property {number} [duration=250] Animation duration in milliseconds.\n */\n\n\n/**\n * @classdesc\n * Allows the user to rotate the map by clicking and dragging on the map,\n * normally combined with an {@link module:ol/events/condition} that limits\n * it to when the alt and shift keys are held down.\n *\n * This interaction is only supported for mouse devices.\n * @api\n */\nvar DragRotate = /*@__PURE__*/(function (PointerInteraction) {\n  function DragRotate(opt_options) {\n\n    var options = opt_options ? opt_options : {};\n\n    PointerInteraction.call(this, {\n      stopDown: FALSE\n    });\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.condition ? options.condition : altShiftKeysOnly;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.lastAngle_ = undefined;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n  }\n\n  if ( PointerInteraction ) DragRotate.__proto__ = PointerInteraction;\n  DragRotate.prototype = Object.create( PointerInteraction && PointerInteraction.prototype );\n  DragRotate.prototype.constructor = DragRotate;\n\n  /**\n   * @inheritDoc\n   */\n  DragRotate.prototype.handleDragEvent = function handleDragEvent (mapBrowserEvent) {\n    if (!mouseOnly(mapBrowserEvent)) {\n      return;\n    }\n\n    var map = mapBrowserEvent.map;\n    var view = map.getView();\n    if (view.getConstraints().rotation === disable) {\n      return;\n    }\n    var size = map.getSize();\n    var offset = mapBrowserEvent.pixel;\n    var theta =\n        Math.atan2(size[1] / 2 - offset[1], offset[0] - size[0] / 2);\n    if (this.lastAngle_ !== undefined) {\n      var delta = theta - this.lastAngle_;\n      var rotation = view.getRotation();\n      rotateWithoutConstraints(view, rotation - delta);\n    }\n    this.lastAngle_ = theta;\n  };\n\n\n  /**\n   * @inheritDoc\n   */\n  DragRotate.prototype.handleUpEvent = function handleUpEvent (mapBrowserEvent) {\n    if (!mouseOnly(mapBrowserEvent)) {\n      return true;\n    }\n\n    var map = mapBrowserEvent.map;\n    var view = map.getView();\n    view.setHint(ViewHint.INTERACTING, -1);\n    var rotation = view.getRotation();\n    rotate(view, rotation, undefined, this.duration_);\n    return false;\n  };\n\n\n  /**\n   * @inheritDoc\n   */\n  DragRotate.prototype.handleDownEvent = function handleDownEvent (mapBrowserEvent) {\n    if (!mouseOnly(mapBrowserEvent)) {\n      return false;\n    }\n\n    if (mouseActionButton(mapBrowserEvent) && this.condition_(mapBrowserEvent)) {\n      var map = mapBrowserEvent.map;\n      map.getView().setHint(ViewHint.INTERACTING, 1);\n      this.lastAngle_ = undefined;\n      return true;\n    } else {\n      return false;\n    }\n  };\n\n  return DragRotate;\n}(PointerInteraction));\n\nexport default DragRotate;\n\n//# sourceMappingURL=DragRotate.js.map","/**\n * @module ol/render/Box\n */\n\nimport Disposable from '../Disposable.js';\nimport Polygon from '../geom/Polygon.js';\n\nvar RenderBox = /*@__PURE__*/(function (Disposable) {\n  function RenderBox(className) {\n    Disposable.call(this);\n\n    /**\n     * @type {import(\"../geom/Polygon.js\").default}\n     * @private\n     */\n    this.geometry_ = null;\n\n    /**\n     * @type {HTMLDivElement}\n     * @private\n     */\n    this.element_ = /** @type {HTMLDivElement} */ (document.createElement('div'));\n    this.element_.style.position = 'absolute';\n    this.element_.className = 'ol-box ' + className;\n\n    /**\n     * @private\n     * @type {import(\"../PluggableMap.js\").default}\n     */\n    this.map_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../pixel.js\").Pixel}\n     */\n    this.startPixel_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../pixel.js\").Pixel}\n     */\n    this.endPixel_ = null;\n\n  }\n\n  if ( Disposable ) RenderBox.__proto__ = Disposable;\n  RenderBox.prototype = Object.create( Disposable && Disposable.prototype );\n  RenderBox.prototype.constructor = RenderBox;\n\n  /**\n   * @inheritDoc\n   */\n  RenderBox.prototype.disposeInternal = function disposeInternal () {\n    this.setMap(null);\n  };\n\n  /**\n   * @private\n   */\n  RenderBox.prototype.render_ = function render_ () {\n    var startPixel = this.startPixel_;\n    var endPixel = this.endPixel_;\n    var px = 'px';\n    var style = this.element_.style;\n    style.left = Math.min(startPixel[0], endPixel[0]) + px;\n    style.top = Math.min(startPixel[1], endPixel[1]) + px;\n    style.width = Math.abs(endPixel[0] - startPixel[0]) + px;\n    style.height = Math.abs(endPixel[1] - startPixel[1]) + px;\n  };\n\n  /**\n   * @param {import(\"../PluggableMap.js\").default} map Map.\n   */\n  RenderBox.prototype.setMap = function setMap (map) {\n    if (this.map_) {\n      this.map_.getOverlayContainer().removeChild(this.element_);\n      var style = this.element_.style;\n      style.left = style.top = style.width = style.height = 'inherit';\n    }\n    this.map_ = map;\n    if (this.map_) {\n      this.map_.getOverlayContainer().appendChild(this.element_);\n    }\n  };\n\n  /**\n   * @param {import(\"../pixel.js\").Pixel} startPixel Start pixel.\n   * @param {import(\"../pixel.js\").Pixel} endPixel End pixel.\n   */\n  RenderBox.prototype.setPixels = function setPixels (startPixel, endPixel) {\n    this.startPixel_ = startPixel;\n    this.endPixel_ = endPixel;\n    this.createOrUpdateGeometry();\n    this.render_();\n  };\n\n  /**\n   * Creates or updates the cached geometry.\n   */\n  RenderBox.prototype.createOrUpdateGeometry = function createOrUpdateGeometry () {\n    var startPixel = this.startPixel_;\n    var endPixel = this.endPixel_;\n    var pixels = [\n      startPixel,\n      [startPixel[0], endPixel[1]],\n      endPixel,\n      [endPixel[0], startPixel[1]]\n    ];\n    var coordinates = pixels.map(this.map_.getCoordinateFromPixel, this.map_);\n    // close the polygon\n    coordinates[4] = coordinates[0].slice();\n    if (!this.geometry_) {\n      this.geometry_ = new Polygon([coordinates]);\n    } else {\n      this.geometry_.setCoordinates([coordinates]);\n    }\n  };\n\n  /**\n   * @return {import(\"../geom/Polygon.js\").default} Geometry.\n   */\n  RenderBox.prototype.getGeometry = function getGeometry () {\n    return this.geometry_;\n  };\n\n  return RenderBox;\n}(Disposable));\n\n\nexport default RenderBox;\n\n//# sourceMappingURL=Box.js.map","/**\n * @module ol/interaction/DragBox\n */\n// FIXME draw drag box\nimport Event from '../events/Event.js';\nimport {always, mouseOnly, mouseActionButton} from '../events/condition.js';\nimport {VOID} from '../functions.js';\nimport PointerInteraction from './Pointer.js';\nimport RenderBox from '../render/Box.js';\n\n\n/**\n * A function that takes a {@link module:ol/MapBrowserEvent} and two\n * {@link module:ol/pixel~Pixel}s and returns a `{boolean}`. If the condition is met,\n * true should be returned.\n * @typedef {function(this: ?, import(\"../MapBrowserEvent.js\").default, import(\"../pixel.js\").Pixel, import(\"../pixel.js\").Pixel):boolean} EndCondition\n */\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-dragbox'] CSS class name for styling the box.\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a boolean\n * to indicate whether that event should be handled.\n * Default is {@link ol/events/condition~always}.\n * @property {number} [minArea=64] The minimum area of the box in pixel, this value is used by the default\n * `boxEndCondition` function.\n * @property {EndCondition} [boxEndCondition] A function that takes a {@link module:ol/MapBrowserEvent~MapBrowserEvent} and two\n * {@link module:ol/pixel~Pixel}s to indicate whether a `boxend` event should be fired.\n * Default is `true` if the area of the box is bigger than the `minArea` option.\n * @property {function(this:DragBox, import(\"../MapBrowserEvent.js\").default)} onBoxEnd Code to execute just\n * before `boxend` is fired.\n */\n\n\n/**\n * @enum {string}\n */\nvar DragBoxEventType = {\n  /**\n   * Triggered upon drag box start.\n   * @event DragBoxEvent#boxstart\n   * @api\n   */\n  BOXSTART: 'boxstart',\n\n  /**\n   * Triggered on drag when box is active.\n   * @event DragBoxEvent#boxdrag\n   * @api\n   */\n  BOXDRAG: 'boxdrag',\n\n  /**\n   * Triggered upon drag box end.\n   * @event DragBoxEvent#boxend\n   * @api\n   */\n  BOXEND: 'boxend'\n};\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/interaction/DragBox~DragBox} instances are instances of\n * this type.\n */\nvar DragBoxEvent = /*@__PURE__*/(function (Event) {\n  function DragBoxEvent(type, coordinate, mapBrowserEvent) {\n    Event.call(this, type);\n\n    /**\n     * The coordinate of the drag event.\n     * @const\n     * @type {import(\"../coordinate.js\").Coordinate}\n     * @api\n     */\n    this.coordinate = coordinate;\n\n    /**\n     * @const\n     * @type {import(\"../MapBrowserEvent.js\").default}\n     * @api\n     */\n    this.mapBrowserEvent = mapBrowserEvent;\n\n  }\n\n  if ( Event ) DragBoxEvent.__proto__ = Event;\n  DragBoxEvent.prototype = Object.create( Event && Event.prototype );\n  DragBoxEvent.prototype.constructor = DragBoxEvent;\n\n  return DragBoxEvent;\n}(Event));\n\n\n/**\n * @classdesc\n * Allows the user to draw a vector box by clicking and dragging on the map,\n * normally combined with an {@link module:ol/events/condition} that limits\n * it to when the shift or other key is held down. This is used, for example,\n * for zooming to a specific area of the map\n * (see {@link module:ol/interaction/DragZoom~DragZoom} and\n * {@link module:ol/interaction/DragRotateAndZoom}).\n *\n * This interaction is only supported for mouse devices.\n *\n * @fires DragBoxEvent\n * @api\n */\nvar DragBox = /*@__PURE__*/(function (PointerInteraction) {\n  function DragBox(opt_options) {\n\n    PointerInteraction.call(this);\n\n    var options = opt_options ? opt_options : {};\n\n    /**\n    * @type {import(\"../render/Box.js\").default}\n    * @private\n    */\n    this.box_ = new RenderBox(options.className || 'ol-dragbox');\n\n    /**\n    * @type {number}\n    * @private\n    */\n    this.minArea_ = options.minArea !== undefined ? options.minArea : 64;\n\n    /**\n     * Function to execute just before `onboxend` is fired\n     * @type {function(this:DragBox, import(\"../MapBrowserEvent.js\").default)}\n     * @private\n     */\n    this.onBoxEnd_ = options.onBoxEnd ? options.onBoxEnd : VOID;\n\n    /**\n    * @type {import(\"../pixel.js\").Pixel}\n    * @private\n    */\n    this.startPixel_ = null;\n\n    /**\n    * @private\n    * @type {import(\"../events/condition.js\").Condition}\n    */\n    this.condition_ = options.condition ? options.condition : always;\n\n    /**\n    * @private\n    * @type {EndCondition}\n    */\n    this.boxEndCondition_ = options.boxEndCondition ?\n      options.boxEndCondition : this.defaultBoxEndCondition;\n  }\n\n  if ( PointerInteraction ) DragBox.__proto__ = PointerInteraction;\n  DragBox.prototype = Object.create( PointerInteraction && PointerInteraction.prototype );\n  DragBox.prototype.constructor = DragBox;\n\n  /**\n   * The default condition for determining whether the boxend event\n   * should fire.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent The originating MapBrowserEvent\n   *     leading to the box end.\n   * @param {import(\"../pixel.js\").Pixel} startPixel The starting pixel of the box.\n   * @param {import(\"../pixel.js\").Pixel} endPixel The end pixel of the box.\n   * @return {boolean} Whether or not the boxend condition should be fired.\n   */\n  DragBox.prototype.defaultBoxEndCondition = function defaultBoxEndCondition (mapBrowserEvent, startPixel, endPixel) {\n    var width = endPixel[0] - startPixel[0];\n    var height = endPixel[1] - startPixel[1];\n    return width * width + height * height >= this.minArea_;\n  };\n\n  /**\n  * Returns geometry of last drawn box.\n  * @return {import(\"../geom/Polygon.js\").default} Geometry.\n  * @api\n  */\n  DragBox.prototype.getGeometry = function getGeometry () {\n    return this.box_.getGeometry();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  DragBox.prototype.handleDragEvent = function handleDragEvent (mapBrowserEvent) {\n    if (!mouseOnly(mapBrowserEvent)) {\n      return;\n    }\n\n    this.box_.setPixels(this.startPixel_, mapBrowserEvent.pixel);\n\n    this.dispatchEvent(new DragBoxEvent(DragBoxEventType.BOXDRAG,\n      mapBrowserEvent.coordinate, mapBrowserEvent));\n  };\n\n  /**\n   * @inheritDoc\n   */\n  DragBox.prototype.handleUpEvent = function handleUpEvent (mapBrowserEvent) {\n    if (!mouseOnly(mapBrowserEvent)) {\n      return true;\n    }\n\n    this.box_.setMap(null);\n\n    if (this.boxEndCondition_(mapBrowserEvent, this.startPixel_, mapBrowserEvent.pixel)) {\n      this.onBoxEnd_(mapBrowserEvent);\n      this.dispatchEvent(new DragBoxEvent(DragBoxEventType.BOXEND,\n        mapBrowserEvent.coordinate, mapBrowserEvent));\n    }\n    return false;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  DragBox.prototype.handleDownEvent = function handleDownEvent (mapBrowserEvent) {\n    if (!mouseOnly(mapBrowserEvent)) {\n      return false;\n    }\n\n    if (mouseActionButton(mapBrowserEvent) &&\n        this.condition_(mapBrowserEvent)) {\n      this.startPixel_ = mapBrowserEvent.pixel;\n      this.box_.setMap(mapBrowserEvent.map);\n      this.box_.setPixels(this.startPixel_, this.startPixel_);\n      this.dispatchEvent(new DragBoxEvent(DragBoxEventType.BOXSTART,\n        mapBrowserEvent.coordinate, mapBrowserEvent));\n      return true;\n    } else {\n      return false;\n    }\n  };\n\n  return DragBox;\n}(PointerInteraction));\n\n\nexport default DragBox;\n\n//# sourceMappingURL=DragBox.js.map","/**\n * @module ol/interaction/DragZoom\n */\nimport {easeOut} from '../easing.js';\nimport {shiftKeyOnly} from '../events/condition.js';\nimport {createOrUpdateFromCoordinates, getBottomLeft, getCenter, getTopRight, scaleFromCenter} from '../extent.js';\nimport DragBox from './DragBox.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-dragzoom'] CSS class name for styling the\n * box.\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled.\n * Default is {@link module:ol/events/condition~shiftKeyOnly}.\n * @property {number} [duration=200] Animation duration in milliseconds.\n * @property {boolean} [out=false] Use interaction for zooming out.\n */\n\n\n/**\n * @classdesc\n * Allows the user to zoom the map by clicking and dragging on the map,\n * normally combined with an {@link module:ol/events/condition} that limits\n * it to when a key, shift by default, is held down.\n *\n * To change the style of the box, use CSS and the `.ol-dragzoom` selector, or\n * your custom one configured with `className`.\n * @api\n */\nvar DragZoom = /*@__PURE__*/(function (DragBox) {\n  function DragZoom(opt_options) {\n    var options = opt_options ? opt_options : {};\n\n    var condition = options.condition ? options.condition : shiftKeyOnly;\n\n    DragBox.call(this, {\n      condition: condition,\n      className: options.className || 'ol-dragzoom',\n      onBoxEnd: onBoxEnd\n    });\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 200;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.out_ = options.out !== undefined ? options.out : false;\n  }\n\n  if ( DragBox ) DragZoom.__proto__ = DragBox;\n  DragZoom.prototype = Object.create( DragBox && DragBox.prototype );\n  DragZoom.prototype.constructor = DragZoom;\n\n  return DragZoom;\n}(DragBox));\n\n\n/**\n * @this {DragZoom}\n */\nfunction onBoxEnd() {\n  var map = this.getMap();\n  var view = /** @type {!import(\"../View.js\").default} */ (map.getView());\n  var size = /** @type {!import(\"../size.js\").Size} */ (map.getSize());\n  var extent = this.getGeometry().getExtent();\n\n  if (this.out_) {\n    var mapExtent = view.calculateExtent(size);\n    var boxPixelExtent = createOrUpdateFromCoordinates([\n      map.getPixelFromCoordinate(getBottomLeft(extent)),\n      map.getPixelFromCoordinate(getTopRight(extent))]);\n    var factor = view.getResolutionForExtent(boxPixelExtent, size);\n\n    scaleFromCenter(mapExtent, 1 / factor);\n    extent = mapExtent;\n  }\n\n  var resolution = view.constrainResolution(\n    view.getResolutionForExtent(extent, size));\n\n  var center = getCenter(extent);\n  center = view.constrainCenter(center);\n\n  view.animate({\n    resolution: resolution,\n    center: center,\n    duration: this.duration_,\n    easing: easeOut\n  });\n}\n\n\nexport default DragZoom;\n\n//# sourceMappingURL=DragZoom.js.map","/**\n * @module ol/events/KeyCode\n */\n\n/**\n * @enum {number}\n * @const\n */\nexport default {\n  LEFT: 37,\n  UP: 38,\n  RIGHT: 39,\n  DOWN: 40\n};\n\n//# sourceMappingURL=KeyCode.js.map","/**\n * @module ol/interaction/KeyboardPan\n */\nimport {rotate as rotateCoordinate} from '../coordinate.js';\nimport EventType from '../events/EventType.js';\nimport KeyCode from '../events/KeyCode.js';\nimport {noModifierKeys, targetNotEditable} from '../events/condition.js';\nimport Interaction, {pan} from './Interaction.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. Default is\n * {@link module:ol/events/condition~noModifierKeys} and\n * {@link module:ol/events/condition~targetNotEditable}.\n * @property {number} [duration=100] Animation duration in milliseconds.\n * @property {number} [pixelDelta=128] The amount of pixels to pan on each key\n * press.\n */\n\n\n/**\n * @classdesc\n * Allows the user to pan the map using keyboard arrows.\n * Note that, although this interaction is by default included in maps,\n * the keys can only be used when browser focus is on the element to which\n * the keyboard events are attached. By default, this is the map div,\n * though you can change this with the `keyboardEventTarget` in\n * {@link module:ol/Map~Map}. `document` never loses focus but, for any other\n * element, focus will have to be on, and returned to, this element if the keys\n * are to function.\n * See also {@link module:ol/interaction/KeyboardZoom~KeyboardZoom}.\n * @api\n */\nvar KeyboardPan = /*@__PURE__*/(function (Interaction) {\n  function KeyboardPan(opt_options) {\n\n    Interaction.call(this, {\n      handleEvent: handleEvent\n    });\n\n    var options = opt_options || {};\n\n    /**\n     * @private\n     * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Browser event.\n     * @return {boolean} Combined condition result.\n     */\n    this.defaultCondition_ = function(mapBrowserEvent) {\n      return noModifierKeys(mapBrowserEvent) &&\n        targetNotEditable(mapBrowserEvent);\n    };\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.condition !== undefined ?\n      options.condition : this.defaultCondition_;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 100;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.pixelDelta_ = options.pixelDelta !== undefined ?\n      options.pixelDelta : 128;\n\n  }\n\n  if ( Interaction ) KeyboardPan.__proto__ = Interaction;\n  KeyboardPan.prototype = Object.create( Interaction && Interaction.prototype );\n  KeyboardPan.prototype.constructor = KeyboardPan;\n\n  return KeyboardPan;\n}(Interaction));\n\n\n/**\n * Handles the {@link module:ol/MapBrowserEvent map browser event} if it was a\n * `KeyEvent`, and decides the direction to pan to (if an arrow key was\n * pressed).\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} `false` to stop event propagation.\n * @this {KeyboardPan}\n */\nfunction handleEvent(mapBrowserEvent) {\n  var stopEvent = false;\n  if (mapBrowserEvent.type == EventType.KEYDOWN) {\n    var keyEvent = /** @type {KeyboardEvent} */ (mapBrowserEvent.originalEvent);\n    var keyCode = keyEvent.keyCode;\n    if (this.condition_(mapBrowserEvent) &&\n        (keyCode == KeyCode.DOWN ||\n        keyCode == KeyCode.LEFT ||\n        keyCode == KeyCode.RIGHT ||\n        keyCode == KeyCode.UP)) {\n      var map = mapBrowserEvent.map;\n      var view = map.getView();\n      var mapUnitsDelta = view.getResolution() * this.pixelDelta_;\n      var deltaX = 0, deltaY = 0;\n      if (keyCode == KeyCode.DOWN) {\n        deltaY = -mapUnitsDelta;\n      } else if (keyCode == KeyCode.LEFT) {\n        deltaX = -mapUnitsDelta;\n      } else if (keyCode == KeyCode.RIGHT) {\n        deltaX = mapUnitsDelta;\n      } else {\n        deltaY = mapUnitsDelta;\n      }\n      var delta = [deltaX, deltaY];\n      rotateCoordinate(delta, view.getRotation());\n      pan(view, delta, this.duration_);\n      mapBrowserEvent.preventDefault();\n      stopEvent = true;\n    }\n  }\n  return !stopEvent;\n}\n\nexport default KeyboardPan;\n\n//# sourceMappingURL=KeyboardPan.js.map","/**\n * @module ol/interaction/KeyboardZoom\n */\nimport EventType from '../events/EventType.js';\nimport {targetNotEditable} from '../events/condition.js';\nimport Interaction, {zoomByDelta} from './Interaction.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=100] Animation duration in milliseconds.\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. Default is\n * {@link module:ol/events/condition~targetNotEditable}.\n * @property {number} [delta=1] The zoom level delta on each key press.\n */\n\n\n/**\n * @classdesc\n * Allows the user to zoom the map using keyboard + and -.\n * Note that, although this interaction is by default included in maps,\n * the keys can only be used when browser focus is on the element to which\n * the keyboard events are attached. By default, this is the map div,\n * though you can change this with the `keyboardEventTarget` in\n * {@link module:ol/Map~Map}. `document` never loses focus but, for any other\n * element, focus will have to be on, and returned to, this element if the keys\n * are to function.\n * See also {@link module:ol/interaction/KeyboardPan~KeyboardPan}.\n * @api\n */\nvar KeyboardZoom = /*@__PURE__*/(function (Interaction) {\n  function KeyboardZoom(opt_options) {\n\n    Interaction.call(this, {\n      handleEvent: handleEvent\n    });\n\n    var options = opt_options ? opt_options : {};\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.condition ? options.condition : targetNotEditable;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.delta_ = options.delta ? options.delta : 1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 100;\n\n  }\n\n  if ( Interaction ) KeyboardZoom.__proto__ = Interaction;\n  KeyboardZoom.prototype = Object.create( Interaction && Interaction.prototype );\n  KeyboardZoom.prototype.constructor = KeyboardZoom;\n\n  return KeyboardZoom;\n}(Interaction));\n\n\n/**\n * Handles the {@link module:ol/MapBrowserEvent map browser event} if it was a\n * `KeyEvent`, and decides whether to zoom in or out (depending on whether the\n * key pressed was '+' or '-').\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} `false` to stop event propagation.\n * @this {KeyboardZoom}\n */\nfunction handleEvent(mapBrowserEvent) {\n  var stopEvent = false;\n  if (mapBrowserEvent.type == EventType.KEYDOWN ||\n      mapBrowserEvent.type == EventType.KEYPRESS) {\n    var keyEvent = /** @type {KeyboardEvent} */ (mapBrowserEvent.originalEvent);\n    var charCode = keyEvent.charCode;\n    if (this.condition_(mapBrowserEvent) &&\n        (charCode == '+'.charCodeAt(0) || charCode == '-'.charCodeAt(0))) {\n      var map = mapBrowserEvent.map;\n      var delta = (charCode == '+'.charCodeAt(0)) ? this.delta_ : -this.delta_;\n      var view = map.getView();\n      zoomByDelta(view, delta, undefined, this.duration_);\n      mapBrowserEvent.preventDefault();\n      stopEvent = true;\n    }\n  }\n  return !stopEvent;\n}\n\nexport default KeyboardZoom;\n\n//# sourceMappingURL=KeyboardZoom.js.map","/**\n * @module ol/interaction/MouseWheelZoom\n */\nimport ViewHint from '../ViewHint.js';\nimport {always} from '../events/condition.js';\nimport {easeOut} from '../easing.js';\nimport EventType from '../events/EventType.js';\nimport {DEVICE_PIXEL_RATIO, FIREFOX, SAFARI} from '../has.js';\nimport Interaction, {zoomByDelta} from './Interaction.js';\nimport {clamp} from '../math.js';\n\n\n/**\n * Maximum mouse wheel delta.\n * @type {number}\n */\nvar MAX_DELTA = 1;\n\n\n/**\n * @enum {string}\n */\nexport var Mode = {\n  TRACKPAD: 'trackpad',\n  WHEEL: 'wheel'\n};\n\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. Default is\n * {@link module:ol/events/condition~always}.\n * @property {number} [duration=250] Animation duration in milliseconds.\n * @property {number} [timeout=80] Mouse wheel timeout duration in milliseconds.\n * @property {boolean} [constrainResolution=false] When using a trackpad or\n * magic mouse, zoom to the closest integer zoom level after the scroll gesture\n * ends.\n * @property {boolean} [useAnchor=true] Enable zooming using the mouse's\n * location as the anchor. When set to `false`, zooming in and out will zoom to\n * the center of the screen instead of zooming on the mouse's location.\n */\n\n\n/**\n * @classdesc\n * Allows the user to zoom the map by scrolling the mouse wheel.\n * @api\n */\nvar MouseWheelZoom = /*@__PURE__*/(function (Interaction) {\n  function MouseWheelZoom(opt_options) {\n\n    var options = opt_options ? opt_options : {};\n\n    Interaction.call(/** @type {import(\"./Interaction.js\").InteractionOptions} */ this, (options));\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.delta_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.timeout_ = options.timeout !== undefined ? options.timeout : 80;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.useAnchor_ = options.useAnchor !== undefined ? options.useAnchor : true;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.constrainResolution_ = options.constrainResolution || false;\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.condition ? options.condition : always;\n\n    /**\n     * @private\n     * @type {?import(\"../coordinate.js\").Coordinate}\n     */\n    this.lastAnchor_ = null;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.startTime_ = undefined;\n\n    /**\n     * @private\n     * @type {?}\n     */\n    this.timeoutId_;\n\n    /**\n     * @private\n     * @type {Mode|undefined}\n     */\n    this.mode_ = undefined;\n\n    /**\n     * Trackpad events separated by this delay will be considered separate\n     * interactions.\n     * @type {number}\n     */\n    this.trackpadEventGap_ = 400;\n\n    /**\n     * @type {?}\n     */\n    this.trackpadTimeoutId_;\n\n    /**\n     * The number of delta values per zoom level\n     * @private\n     * @type {number}\n     */\n    this.trackpadDeltaPerZoom_ = 300;\n\n    /**\n     * The zoom factor by which scroll zooming is allowed to exceed the limits.\n     * @private\n     * @type {number}\n     */\n    this.trackpadZoomBuffer_ = 1.5;\n\n  }\n\n  if ( Interaction ) MouseWheelZoom.__proto__ = Interaction;\n  MouseWheelZoom.prototype = Object.create( Interaction && Interaction.prototype );\n  MouseWheelZoom.prototype.constructor = MouseWheelZoom;\n\n  /**\n   * @private\n   */\n  MouseWheelZoom.prototype.decrementInteractingHint_ = function decrementInteractingHint_ () {\n    this.trackpadTimeoutId_ = undefined;\n    var view = this.getMap().getView();\n    view.setHint(ViewHint.INTERACTING, -1);\n  };\n\n  /**\n   * Handles the {@link module:ol/MapBrowserEvent map browser event} (if it was a mousewheel-event) and eventually\n   * zooms the map.\n   * @override\n   */\n  MouseWheelZoom.prototype.handleEvent = function handleEvent (mapBrowserEvent) {\n    if (!this.condition_(mapBrowserEvent)) {\n      return true;\n    }\n    var type = mapBrowserEvent.type;\n    if (type !== EventType.WHEEL && type !== EventType.MOUSEWHEEL) {\n      return true;\n    }\n\n    mapBrowserEvent.preventDefault();\n\n    var map = mapBrowserEvent.map;\n    var wheelEvent = /** @type {WheelEvent} */ (mapBrowserEvent.originalEvent);\n\n    if (this.useAnchor_) {\n      this.lastAnchor_ = mapBrowserEvent.coordinate;\n    }\n\n    // Delta normalisation inspired by\n    // https://github.com/mapbox/mapbox-gl-js/blob/001c7b9/js/ui/handler/scroll_zoom.js\n    var delta;\n    if (mapBrowserEvent.type == EventType.WHEEL) {\n      delta = wheelEvent.deltaY;\n      if (FIREFOX &&\n          wheelEvent.deltaMode === WheelEvent.DOM_DELTA_PIXEL) {\n        delta /= DEVICE_PIXEL_RATIO;\n      }\n      if (wheelEvent.deltaMode === WheelEvent.DOM_DELTA_LINE) {\n        delta *= 40;\n      }\n    } else if (mapBrowserEvent.type == EventType.MOUSEWHEEL) {\n      delta = -wheelEvent.wheelDeltaY;\n      if (SAFARI) {\n        delta /= 3;\n      }\n    }\n\n    if (delta === 0) {\n      return false;\n    }\n\n    var now = Date.now();\n\n    if (this.startTime_ === undefined) {\n      this.startTime_ = now;\n    }\n\n    if (!this.mode_ || now - this.startTime_ > this.trackpadEventGap_) {\n      this.mode_ = Math.abs(delta) < 4 ?\n        Mode.TRACKPAD :\n        Mode.WHEEL;\n    }\n\n    if (this.mode_ === Mode.TRACKPAD) {\n      var view = map.getView();\n      if (this.trackpadTimeoutId_) {\n        clearTimeout(this.trackpadTimeoutId_);\n      } else {\n        view.setHint(ViewHint.INTERACTING, 1);\n      }\n      this.trackpadTimeoutId_ = setTimeout(this.decrementInteractingHint_.bind(this), this.trackpadEventGap_);\n      var resolution = view.getResolution() * Math.pow(2, delta / this.trackpadDeltaPerZoom_);\n      var minResolution = view.getMinResolution();\n      var maxResolution = view.getMaxResolution();\n      var rebound = 0;\n      if (resolution < minResolution) {\n        resolution = Math.max(resolution, minResolution / this.trackpadZoomBuffer_);\n        rebound = 1;\n      } else if (resolution > maxResolution) {\n        resolution = Math.min(resolution, maxResolution * this.trackpadZoomBuffer_);\n        rebound = -1;\n      }\n      if (this.lastAnchor_) {\n        var center = view.calculateCenterZoom(resolution, this.lastAnchor_);\n        view.setCenter(view.constrainCenter(center));\n      }\n      view.setResolution(resolution);\n\n      if (rebound === 0 && this.constrainResolution_) {\n        view.animate({\n          resolution: view.constrainResolution(resolution, delta > 0 ? -1 : 1),\n          easing: easeOut,\n          anchor: this.lastAnchor_,\n          duration: this.duration_\n        });\n      }\n\n      if (rebound > 0) {\n        view.animate({\n          resolution: minResolution,\n          easing: easeOut,\n          anchor: this.lastAnchor_,\n          duration: 500\n        });\n      } else if (rebound < 0) {\n        view.animate({\n          resolution: maxResolution,\n          easing: easeOut,\n          anchor: this.lastAnchor_,\n          duration: 500\n        });\n      }\n      this.startTime_ = now;\n      return false;\n    }\n\n    this.delta_ += delta;\n\n    var timeLeft = Math.max(this.timeout_ - (now - this.startTime_), 0);\n\n    clearTimeout(this.timeoutId_);\n    this.timeoutId_ = setTimeout(this.handleWheelZoom_.bind(this, map), timeLeft);\n\n    return false;\n  };\n\n  /**\n   * @private\n   * @param {import(\"../PluggableMap.js\").default} map Map.\n   */\n  MouseWheelZoom.prototype.handleWheelZoom_ = function handleWheelZoom_ (map) {\n    var view = map.getView();\n    if (view.getAnimating()) {\n      view.cancelAnimations();\n    }\n    var maxDelta = MAX_DELTA;\n    var delta = clamp(this.delta_, -maxDelta, maxDelta);\n    zoomByDelta(view, -delta, this.lastAnchor_, this.duration_);\n    this.mode_ = undefined;\n    this.delta_ = 0;\n    this.lastAnchor_ = null;\n    this.startTime_ = undefined;\n    this.timeoutId_ = undefined;\n  };\n\n  /**\n   * Enable or disable using the mouse's location as an anchor when zooming\n   * @param {boolean} useAnchor true to zoom to the mouse's location, false\n   * to zoom to the center of the map\n   * @api\n   */\n  MouseWheelZoom.prototype.setMouseAnchor = function setMouseAnchor (useAnchor) {\n    this.useAnchor_ = useAnchor;\n    if (!useAnchor) {\n      this.lastAnchor_ = null;\n    }\n  };\n\n  return MouseWheelZoom;\n}(Interaction));\n\nexport default MouseWheelZoom;\n\n//# sourceMappingURL=MouseWheelZoom.js.map","/**\n * @module ol/interaction/PinchRotate\n */\nimport ViewHint from '../ViewHint.js';\nimport {FALSE} from '../functions.js';\nimport {rotate, rotateWithoutConstraints} from './Interaction.js';\nimport PointerInteraction, {centroid as centroidFromPointers} from './Pointer.js';\nimport {disable} from '../rotationconstraint.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=250] The duration of the animation in\n * milliseconds.\n * @property {number} [threshold=0.3] Minimal angle in radians to start a rotation.\n */\n\n\n/**\n * @classdesc\n * Allows the user to rotate the map by twisting with two fingers\n * on a touch screen.\n * @api\n */\nvar PinchRotate = /*@__PURE__*/(function (PointerInteraction) {\n  function PinchRotate(opt_options) {\n\n    var options = opt_options ? opt_options : {};\n\n    var pointerOptions = /** @type {import(\"./Pointer.js\").Options} */ (options);\n\n    if (!pointerOptions.stopDown) {\n      pointerOptions.stopDown = FALSE;\n    }\n\n    PointerInteraction.call(this, pointerOptions);\n\n    /**\n     * @private\n     * @type {import(\"../coordinate.js\").Coordinate}\n     */\n    this.anchor_ = null;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.lastAngle_ = undefined;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.rotating_ = false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.rotationDelta_ = 0.0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.threshold_ = options.threshold !== undefined ? options.threshold : 0.3;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n  }\n\n  if ( PointerInteraction ) PinchRotate.__proto__ = PointerInteraction;\n  PinchRotate.prototype = Object.create( PointerInteraction && PointerInteraction.prototype );\n  PinchRotate.prototype.constructor = PinchRotate;\n\n  /**\n   * @inheritDoc\n   */\n  PinchRotate.prototype.handleDragEvent = function handleDragEvent (mapBrowserEvent) {\n    var rotationDelta = 0.0;\n\n    var touch0 = this.targetPointers[0];\n    var touch1 = this.targetPointers[1];\n\n    // angle between touches\n    var angle = Math.atan2(\n      touch1.clientY - touch0.clientY,\n      touch1.clientX - touch0.clientX);\n\n    if (this.lastAngle_ !== undefined) {\n      var delta = angle - this.lastAngle_;\n      this.rotationDelta_ += delta;\n      if (!this.rotating_ &&\n          Math.abs(this.rotationDelta_) > this.threshold_) {\n        this.rotating_ = true;\n      }\n      rotationDelta = delta;\n    }\n    this.lastAngle_ = angle;\n\n    var map = mapBrowserEvent.map;\n    var view = map.getView();\n    if (view.getConstraints().rotation === disable) {\n      return;\n    }\n\n    // rotate anchor point.\n    // FIXME: should be the intersection point between the lines:\n    //     touch0,touch1 and previousTouch0,previousTouch1\n    var viewportPosition = map.getViewport().getBoundingClientRect();\n    var centroid = centroidFromPointers(this.targetPointers);\n    centroid[0] -= viewportPosition.left;\n    centroid[1] -= viewportPosition.top;\n    this.anchor_ = map.getCoordinateFromPixel(centroid);\n\n    // rotate\n    if (this.rotating_) {\n      var rotation = view.getRotation();\n      map.render();\n      rotateWithoutConstraints(view, rotation + rotationDelta, this.anchor_);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  PinchRotate.prototype.handleUpEvent = function handleUpEvent (mapBrowserEvent) {\n    if (this.targetPointers.length < 2) {\n      var map = mapBrowserEvent.map;\n      var view = map.getView();\n      view.setHint(ViewHint.INTERACTING, -1);\n      if (this.rotating_) {\n        var rotation = view.getRotation();\n        rotate(view, rotation, this.anchor_, this.duration_);\n      }\n      return false;\n    } else {\n      return true;\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  PinchRotate.prototype.handleDownEvent = function handleDownEvent (mapBrowserEvent) {\n    if (this.targetPointers.length >= 2) {\n      var map = mapBrowserEvent.map;\n      this.anchor_ = null;\n      this.lastAngle_ = undefined;\n      this.rotating_ = false;\n      this.rotationDelta_ = 0.0;\n      if (!this.handlingDownUpSequence) {\n        map.getView().setHint(ViewHint.INTERACTING, 1);\n      }\n      return true;\n    } else {\n      return false;\n    }\n  };\n\n  return PinchRotate;\n}(PointerInteraction));\n\nexport default PinchRotate;\n\n//# sourceMappingURL=PinchRotate.js.map","/**\n * @module ol/interaction/PinchZoom\n */\nimport ViewHint from '../ViewHint.js';\nimport {FALSE} from '../functions.js';\nimport {zoom, zoomWithoutConstraints} from './Interaction.js';\nimport PointerInteraction, {centroid as centroidFromPointers} from './Pointer.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=400] Animation duration in milliseconds.\n * @property {boolean} [constrainResolution=false] Zoom to the closest integer\n * zoom level after the pinch gesture ends.\n */\n\n\n/**\n * @classdesc\n * Allows the user to zoom the map by pinching with two fingers\n * on a touch screen.\n * @api\n */\nvar PinchZoom = /*@__PURE__*/(function (PointerInteraction) {\n  function PinchZoom(opt_options) {\n\n    var options = opt_options ? opt_options : {};\n\n    var pointerOptions = /** @type {import(\"./Pointer.js\").Options} */ (options);\n\n    if (!pointerOptions.stopDown) {\n      pointerOptions.stopDown = FALSE;\n    }\n\n    PointerInteraction.call(this, pointerOptions);\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.constrainResolution_ = options.constrainResolution || false;\n\n    /**\n     * @private\n     * @type {import(\"../coordinate.js\").Coordinate}\n     */\n    this.anchor_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 400;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.lastDistance_ = undefined;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.lastScaleDelta_ = 1;\n\n  }\n\n  if ( PointerInteraction ) PinchZoom.__proto__ = PointerInteraction;\n  PinchZoom.prototype = Object.create( PointerInteraction && PointerInteraction.prototype );\n  PinchZoom.prototype.constructor = PinchZoom;\n\n  /**\n   * @inheritDoc\n   */\n  PinchZoom.prototype.handleDragEvent = function handleDragEvent (mapBrowserEvent) {\n    var scaleDelta = 1.0;\n\n    var touch0 = this.targetPointers[0];\n    var touch1 = this.targetPointers[1];\n    var dx = touch0.clientX - touch1.clientX;\n    var dy = touch0.clientY - touch1.clientY;\n\n    // distance between touches\n    var distance = Math.sqrt(dx * dx + dy * dy);\n\n    if (this.lastDistance_ !== undefined) {\n      scaleDelta = this.lastDistance_ / distance;\n    }\n    this.lastDistance_ = distance;\n\n\n    var map = mapBrowserEvent.map;\n    var view = map.getView();\n    var resolution = view.getResolution();\n    var maxResolution = view.getMaxResolution();\n    var minResolution = view.getMinResolution();\n    var newResolution = resolution * scaleDelta;\n    if (newResolution > maxResolution) {\n      scaleDelta = maxResolution / resolution;\n      newResolution = maxResolution;\n    } else if (newResolution < minResolution) {\n      scaleDelta = minResolution / resolution;\n      newResolution = minResolution;\n    }\n\n    if (scaleDelta != 1.0) {\n      this.lastScaleDelta_ = scaleDelta;\n    }\n\n    // scale anchor point.\n    var viewportPosition = map.getViewport().getBoundingClientRect();\n    var centroid = centroidFromPointers(this.targetPointers);\n    centroid[0] -= viewportPosition.left;\n    centroid[1] -= viewportPosition.top;\n    this.anchor_ = map.getCoordinateFromPixel(centroid);\n\n    // scale, bypass the resolution constraint\n    map.render();\n    zoomWithoutConstraints(view, newResolution, this.anchor_);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  PinchZoom.prototype.handleUpEvent = function handleUpEvent (mapBrowserEvent) {\n    if (this.targetPointers.length < 2) {\n      var map = mapBrowserEvent.map;\n      var view = map.getView();\n      view.setHint(ViewHint.INTERACTING, -1);\n      var resolution = view.getResolution();\n      if (this.constrainResolution_ ||\n          resolution < view.getMinResolution() ||\n          resolution > view.getMaxResolution()) {\n        // Zoom to final resolution, with an animation, and provide a\n        // direction not to zoom out/in if user was pinching in/out.\n        // Direction is > 0 if pinching out, and < 0 if pinching in.\n        var direction = this.lastScaleDelta_ - 1;\n        zoom(view, resolution, this.anchor_, this.duration_, direction);\n      }\n      return false;\n    } else {\n      return true;\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  PinchZoom.prototype.handleDownEvent = function handleDownEvent (mapBrowserEvent) {\n    if (this.targetPointers.length >= 2) {\n      var map = mapBrowserEvent.map;\n      this.anchor_ = null;\n      this.lastDistance_ = undefined;\n      this.lastScaleDelta_ = 1;\n      if (!this.handlingDownUpSequence) {\n        map.getView().setHint(ViewHint.INTERACTING, 1);\n      }\n      return true;\n    } else {\n      return false;\n    }\n  };\n\n  return PinchZoom;\n}(PointerInteraction));\n\nexport default PinchZoom;\n\n//# sourceMappingURL=PinchZoom.js.map","/**\n * @module ol/interaction\n */\nimport Collection from './Collection.js';\nimport Kinetic from './Kinetic.js';\nimport DoubleClickZoom from './interaction/DoubleClickZoom.js';\nimport DragPan from './interaction/DragPan.js';\nimport DragRotate from './interaction/DragRotate.js';\nimport DragZoom from './interaction/DragZoom.js';\nimport KeyboardPan from './interaction/KeyboardPan.js';\nimport KeyboardZoom from './interaction/KeyboardZoom.js';\nimport MouseWheelZoom from './interaction/MouseWheelZoom.js';\nimport PinchRotate from './interaction/PinchRotate.js';\nimport PinchZoom from './interaction/PinchZoom.js';\nimport {focus} from './events/condition.js';\n\nexport {default as DoubleClickZoom} from './interaction/DoubleClickZoom.js';\nexport {default as DragAndDrop} from './interaction/DragAndDrop.js';\nexport {default as DragBox} from './interaction/DragBox.js';\nexport {default as DragPan} from './interaction/DragPan.js';\nexport {default as DragRotate} from './interaction/DragRotate.js';\nexport {default as DragRotateAndZoom} from './interaction/DragRotateAndZoom.js';\nexport {default as DragZoom} from './interaction/DragZoom.js';\nexport {default as Draw} from './interaction/Draw.js';\nexport {default as Extent} from './interaction/Extent.js';\nexport {default as Interaction} from './interaction/Interaction.js';\nexport {default as KeyboardPan} from './interaction/KeyboardPan.js';\nexport {default as KeyboardZoom} from './interaction/KeyboardZoom.js';\nexport {default as Modify} from './interaction/Modify.js';\nexport {default as MouseWheelZoom} from './interaction/MouseWheelZoom.js';\nexport {default as PinchRotate} from './interaction/PinchRotate.js';\nexport {default as PinchZoom} from './interaction/PinchZoom.js';\nexport {default as Pointer} from './interaction/Pointer.js';\nexport {default as Select} from './interaction/Select.js';\nexport {default as Snap} from './interaction/Snap.js';\nexport {default as Translate} from './interaction/Translate.js';\n\n\n/**\n * @typedef {Object} DefaultsOptions\n * @property {boolean} [altShiftDragRotate=true] Whether Alt-Shift-drag rotate is\n * desired.\n * @property {boolean} [onFocusOnly=false] Interact only when the map has the\n * focus. This affects the `MouseWheelZoom` and `DragPan` interactions and is\n * useful when page scroll is desired for maps that do not have the browser's\n * focus.\n * @property {boolean} [constrainResolution=false] Zoom to the closest integer\n * zoom level after the wheel/trackpad or pinch gesture ends.\n * @property {boolean} [doubleClickZoom=true] Whether double click zoom is\n * desired.\n * @property {boolean} [keyboard=true] Whether keyboard interaction is desired.\n * @property {boolean} [mouseWheelZoom=true] Whether mousewheel zoom is desired.\n * @property {boolean} [shiftDragZoom=true] Whether Shift-drag zoom is desired.\n * @property {boolean} [dragPan=true] Whether drag pan is desired.\n * @property {boolean} [pinchRotate=true] Whether pinch rotate is desired.\n * @property {boolean} [pinchZoom=true] Whether pinch zoom is desired.\n * @property {number} [zoomDelta] Zoom level delta when using keyboard or\n * mousewheel zoom.\n * @property {number} [zoomDuration] Duration of the zoom animation in\n * milliseconds.\n */\n\n\n/**\n * Set of interactions included in maps by default. Specific interactions can be\n * excluded by setting the appropriate option to false in the constructor\n * options, but the order of the interactions is fixed.  If you want to specify\n * a different order for interactions, you will need to create your own\n * {@link module:ol/interaction/Interaction} instances and insert\n * them into a {@link module:ol/Collection} in the order you want\n * before creating your {@link module:ol/Map~Map} instance. The default set of\n * interactions, in sequence, is:\n * * {@link module:ol/interaction/DragRotate~DragRotate}\n * * {@link module:ol/interaction/DoubleClickZoom~DoubleClickZoom}\n * * {@link module:ol/interaction/DragPan~DragPan}\n * * {@link module:ol/interaction/PinchRotate~PinchRotate}\n * * {@link module:ol/interaction/PinchZoom~PinchZoom}\n * * {@link module:ol/interaction/KeyboardPan~KeyboardPan}\n * * {@link module:ol/interaction/KeyboardZoom~KeyboardZoom}\n * * {@link module:ol/interaction/MouseWheelZoom~MouseWheelZoom}\n * * {@link module:ol/interaction/DragZoom~DragZoom}\n *\n * @param {DefaultsOptions=} opt_options Defaults options.\n * @return {import(\"./Collection.js\").default<import(\"./interaction/Interaction.js\").default>}\n * A collection of interactions to be used with the {@link module:ol/Map~Map}\n * constructor's `interactions` option.\n * @api\n */\nexport function defaults(opt_options) {\n\n  var options = opt_options ? opt_options : {};\n\n  var interactions = new Collection();\n\n  var kinetic = new Kinetic(-0.005, 0.05, 100);\n\n  var altShiftDragRotate = options.altShiftDragRotate !== undefined ?\n    options.altShiftDragRotate : true;\n  if (altShiftDragRotate) {\n    interactions.push(new DragRotate());\n  }\n\n  var doubleClickZoom = options.doubleClickZoom !== undefined ?\n    options.doubleClickZoom : true;\n  if (doubleClickZoom) {\n    interactions.push(new DoubleClickZoom({\n      delta: options.zoomDelta,\n      duration: options.zoomDuration\n    }));\n  }\n\n  var dragPan = options.dragPan !== undefined ? options.dragPan : true;\n  if (dragPan) {\n    interactions.push(new DragPan({\n      condition: options.onFocusOnly ? focus : undefined,\n      kinetic: kinetic\n    }));\n  }\n\n  var pinchRotate = options.pinchRotate !== undefined ? options.pinchRotate :\n    true;\n  if (pinchRotate) {\n    interactions.push(new PinchRotate());\n  }\n\n  var pinchZoom = options.pinchZoom !== undefined ? options.pinchZoom : true;\n  if (pinchZoom) {\n    interactions.push(new PinchZoom({\n      constrainResolution: options.constrainResolution,\n      duration: options.zoomDuration\n    }));\n  }\n\n  var keyboard = options.keyboard !== undefined ? options.keyboard : true;\n  if (keyboard) {\n    interactions.push(new KeyboardPan());\n    interactions.push(new KeyboardZoom({\n      delta: options.zoomDelta,\n      duration: options.zoomDuration\n    }));\n  }\n\n  var mouseWheelZoom = options.mouseWheelZoom !== undefined ?\n    options.mouseWheelZoom : true;\n  if (mouseWheelZoom) {\n    interactions.push(new MouseWheelZoom({\n      condition: options.onFocusOnly ? focus : undefined,\n      constrainResolution: options.constrainResolution,\n      duration: options.zoomDuration\n    }));\n  }\n\n  var shiftDragZoom = options.shiftDragZoom !== undefined ?\n    options.shiftDragZoom : true;\n  if (shiftDragZoom) {\n    interactions.push(new DragZoom({\n      duration: options.zoomDuration\n    }));\n  }\n\n  return interactions;\n\n}\n\n//# sourceMappingURL=interaction.js.map","/**\n * @module ol/reproj/common\n */\n\n/**\n * Default maximum allowed threshold  (in pixels) for reprojection\n * triangulation.\n * @type {number}\n */\nexport var ERROR_THRESHOLD = 0.5;\n\n/**\n * Enable automatic reprojection of raster sources. Default is `true`.\n * TODO: decide if we want to expose this as a build flag or remove it\n * @type {boolean}\n */\nexport var ENABLE_RASTER_REPROJECTION = true;\n\n//# sourceMappingURL=common.js.map","/**\n * @module ol/ImageBase\n */\nimport {abstract} from './util.js';\nimport EventTarget from './events/Target.js';\nimport EventType from './events/EventType.js';\n\n/**\n * @abstract\n */\nvar ImageBase = /*@__PURE__*/(function (EventTarget) {\n  function ImageBase(extent, resolution, pixelRatio, state) {\n\n    EventTarget.call(this);\n\n    /**\n     * @protected\n     * @type {import(\"./extent.js\").Extent}\n     */\n    this.extent = extent;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.pixelRatio_ = pixelRatio;\n\n    /**\n     * @protected\n     * @type {number|undefined}\n     */\n    this.resolution = resolution;\n\n    /**\n     * @protected\n     * @type {import(\"./ImageState.js\").default}\n     */\n    this.state = state;\n\n  }\n\n  if ( EventTarget ) ImageBase.__proto__ = EventTarget;\n  ImageBase.prototype = Object.create( EventTarget && EventTarget.prototype );\n  ImageBase.prototype.constructor = ImageBase;\n\n  /**\n   * @protected\n   */\n  ImageBase.prototype.changed = function changed () {\n    this.dispatchEvent(EventType.CHANGE);\n  };\n\n  /**\n   * @return {import(\"./extent.js\").Extent} Extent.\n   */\n  ImageBase.prototype.getExtent = function getExtent () {\n    return this.extent;\n  };\n\n  /**\n   * @abstract\n   * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.\n   */\n  ImageBase.prototype.getImage = function getImage () {\n    return abstract();\n  };\n\n  /**\n   * @return {number} PixelRatio.\n   */\n  ImageBase.prototype.getPixelRatio = function getPixelRatio () {\n    return this.pixelRatio_;\n  };\n\n  /**\n   * @return {number} Resolution.\n   */\n  ImageBase.prototype.getResolution = function getResolution () {\n    return /** @type {number} */ (this.resolution);\n  };\n\n  /**\n   * @return {import(\"./ImageState.js\").default} State.\n   */\n  ImageBase.prototype.getState = function getState () {\n    return this.state;\n  };\n\n  /**\n   * Load not yet loaded URI.\n   * @abstract\n   */\n  ImageBase.prototype.load = function load () {\n    abstract();\n  };\n\n  return ImageBase;\n}(EventTarget));\n\n\nexport default ImageBase;\n\n//# sourceMappingURL=ImageBase.js.map","/**\n * @module ol/ImageState\n */\n\n/**\n * @enum {number}\n */\nexport default {\n  IDLE: 0,\n  LOADING: 1,\n  LOADED: 2,\n  ERROR: 3\n};\n\n//# sourceMappingURL=ImageState.js.map","/**\n * @module ol/ImageCanvas\n */\nimport ImageBase from './ImageBase.js';\nimport ImageState from './ImageState.js';\n\n\n/**\n * A function that is called to trigger asynchronous canvas drawing.  It is\n * called with a \"done\" callback that should be called when drawing is done.\n * If any error occurs during drawing, the \"done\" callback should be called with\n * that error.\n *\n * @typedef {function(function(Error=))} Loader\n */\n\n\nvar ImageCanvas = /*@__PURE__*/(function (ImageBase) {\n  function ImageCanvas(extent, resolution, pixelRatio, canvas, opt_loader) {\n\n    var state = opt_loader !== undefined ? ImageState.IDLE : ImageState.LOADED;\n\n    ImageBase.call(this, extent, resolution, pixelRatio, state);\n\n    /**\n     * Optional canvas loader function.\n     * @type {?Loader}\n     * @private\n     */\n    this.loader_ = opt_loader !== undefined ? opt_loader : null;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.canvas_ = canvas;\n\n    /**\n     * @private\n     * @type {Error}\n     */\n    this.error_ = null;\n\n  }\n\n  if ( ImageBase ) ImageCanvas.__proto__ = ImageBase;\n  ImageCanvas.prototype = Object.create( ImageBase && ImageBase.prototype );\n  ImageCanvas.prototype.constructor = ImageCanvas;\n\n  /**\n   * Get any error associated with asynchronous rendering.\n   * @return {Error} Any error that occurred during rendering.\n   */\n  ImageCanvas.prototype.getError = function getError () {\n    return this.error_;\n  };\n\n  /**\n   * Handle async drawing complete.\n   * @param {Error=} err Any error during drawing.\n   * @private\n   */\n  ImageCanvas.prototype.handleLoad_ = function handleLoad_ (err) {\n    if (err) {\n      this.error_ = err;\n      this.state = ImageState.ERROR;\n    } else {\n      this.state = ImageState.LOADED;\n    }\n    this.changed();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  ImageCanvas.prototype.load = function load () {\n    if (this.state == ImageState.IDLE) {\n      this.state = ImageState.LOADING;\n      this.changed();\n      this.loader_(this.handleLoad_.bind(this));\n    }\n  };\n\n  /**\n   * @return {HTMLCanvasElement} Canvas element.\n   */\n  ImageCanvas.prototype.getImage = function getImage () {\n    return this.canvas_;\n  };\n\n  return ImageCanvas;\n}(ImageBase));\n\n\nexport default ImageCanvas;\n\n//# sourceMappingURL=ImageCanvas.js.map","/**\n * @module ol/LayerType\n */\n\n/**\n * A layer type used when creating layer renderers.\n * @enum {string}\n */\nexport default {\n  IMAGE: 'IMAGE',\n  TILE: 'TILE',\n  VECTOR_TILE: 'VECTOR_TILE',\n  VECTOR: 'VECTOR'\n};\n\n//# sourceMappingURL=LayerType.js.map","/**\n * @module ol/layer/VectorRenderType\n */\n\n/**\n * @enum {string}\n * Render mode for vector layers:\n *  * `'image'`: Vector layers are rendered as images. Great performance, but\n *    point symbols and texts are always rotated with the view and pixels are\n *    scaled during zoom animations.\n *  * `'vector'`: Vector layers are rendered as vectors. Most accurate rendering\n *    even during animations, but slower performance.\n * @api\n */\nexport default {\n  IMAGE: 'image',\n  VECTOR: 'vector'\n};\n\n//# sourceMappingURL=VectorRenderType.js.map","/**\n * @module ol/render/Event\n */\n\nimport Event from '../events/Event.js';\n\nvar RenderEvent = /*@__PURE__*/(function (Event) {\n  function RenderEvent(type, opt_vectorContext, opt_frameState, opt_context, opt_glContext) {\n\n    Event.call(this, type);\n\n    /**\n     * For canvas, this is an instance of {@link module:ol/render/canvas/Immediate}.\n     * @type {import(\"./VectorContext.js\").default|undefined}\n     * @api\n     */\n    this.vectorContext = opt_vectorContext;\n\n    /**\n     * An object representing the current render frame state.\n     * @type {import(\"../PluggableMap.js\").FrameState|undefined}\n     * @api\n     */\n    this.frameState = opt_frameState;\n\n    /**\n     * Canvas context. Only available when a Canvas renderer is used, null\n     * otherwise.\n     * @type {CanvasRenderingContext2D|null|undefined}\n     * @api\n     */\n    this.context = opt_context;\n\n    /**\n     * WebGL context. Only available when a WebGL renderer is used, null\n     * otherwise.\n     * @type {import(\"../webgl/Context.js\").default|null|undefined}\n     * @api\n     */\n    this.glContext = opt_glContext;\n\n  }\n\n  if ( Event ) RenderEvent.__proto__ = Event;\n  RenderEvent.prototype = Object.create( Event && Event.prototype );\n  RenderEvent.prototype.constructor = RenderEvent;\n\n  return RenderEvent;\n}(Event));\n\nexport default RenderEvent;\n\n//# sourceMappingURL=Event.js.map","/**\n * @module ol/structs/LRUCache\n */\n\nimport {assert} from '../asserts.js';\nimport EventTarget from '../events/Target.js';\nimport EventType from '../events/EventType.js';\n\n\n/**\n * @typedef {Object} Entry\n * @property {string} key_\n * @property {Object} newer\n * @property {Object} older\n * @property {*} value_\n */\n\n\n/**\n * @classdesc\n * Implements a Least-Recently-Used cache where the keys do not conflict with\n * Object's properties (e.g. 'hasOwnProperty' is not allowed as a key). Expiring\n * items from the cache is the responsibility of the user.\n *\n * @fires import(\"../events/Event.js\").Event\n * @template T\n */\nvar LRUCache = /*@__PURE__*/(function (EventTarget) {\n  function LRUCache(opt_highWaterMark) {\n\n    EventTarget.call(this);\n\n    /**\n     * @type {number}\n     */\n    this.highWaterMark = opt_highWaterMark !== undefined ? opt_highWaterMark : 2048;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.count_ = 0;\n\n    /**\n     * @private\n     * @type {!Object<string, Entry>}\n     */\n    this.entries_ = {};\n\n    /**\n     * @private\n     * @type {?Entry}\n     */\n    this.oldest_ = null;\n\n    /**\n     * @private\n     * @type {?Entry}\n     */\n    this.newest_ = null;\n\n  }\n\n  if ( EventTarget ) LRUCache.__proto__ = EventTarget;\n  LRUCache.prototype = Object.create( EventTarget && EventTarget.prototype );\n  LRUCache.prototype.constructor = LRUCache;\n\n\n  /**\n   * @return {boolean} Can expire cache.\n   */\n  LRUCache.prototype.canExpireCache = function canExpireCache () {\n    return this.getCount() > this.highWaterMark;\n  };\n\n\n  /**\n   * FIXME empty description for jsdoc\n   */\n  LRUCache.prototype.clear = function clear () {\n    this.count_ = 0;\n    this.entries_ = {};\n    this.oldest_ = null;\n    this.newest_ = null;\n    this.dispatchEvent(EventType.CLEAR);\n  };\n\n\n  /**\n   * @param {string} key Key.\n   * @return {boolean} Contains key.\n   */\n  LRUCache.prototype.containsKey = function containsKey (key) {\n    return this.entries_.hasOwnProperty(key);\n  };\n\n\n  /**\n   * @param {function(this: S, T, string, LRUCache): ?} f The function\n   *     to call for every entry from the oldest to the newer. This function takes\n   *     3 arguments (the entry value, the entry key and the LRUCache object).\n   *     The return value is ignored.\n   * @param {S=} opt_this The object to use as `this` in `f`.\n   * @template S\n   */\n  LRUCache.prototype.forEach = function forEach (f, opt_this) {\n    var entry = this.oldest_;\n    while (entry) {\n      f.call(opt_this, entry.value_, entry.key_, this);\n      entry = entry.newer;\n    }\n  };\n\n\n  /**\n   * @param {string} key Key.\n   * @return {T} Value.\n   */\n  LRUCache.prototype.get = function get (key) {\n    var entry = this.entries_[key];\n    assert(entry !== undefined,\n      15); // Tried to get a value for a key that does not exist in the cache\n    if (entry === this.newest_) {\n      return entry.value_;\n    } else if (entry === this.oldest_) {\n      this.oldest_ = /** @type {Entry} */ (this.oldest_.newer);\n      this.oldest_.older = null;\n    } else {\n      entry.newer.older = entry.older;\n      entry.older.newer = entry.newer;\n    }\n    entry.newer = null;\n    entry.older = this.newest_;\n    this.newest_.newer = entry;\n    this.newest_ = entry;\n    return entry.value_;\n  };\n\n\n  /**\n   * Remove an entry from the cache.\n   * @param {string} key The entry key.\n   * @return {T} The removed entry.\n   */\n  LRUCache.prototype.remove = function remove (key) {\n    var entry = this.entries_[key];\n    assert(entry !== undefined, 15); // Tried to get a value for a key that does not exist in the cache\n    if (entry === this.newest_) {\n      this.newest_ = /** @type {Entry} */ (entry.older);\n      if (this.newest_) {\n        this.newest_.newer = null;\n      }\n    } else if (entry === this.oldest_) {\n      this.oldest_ = /** @type {Entry} */ (entry.newer);\n      if (this.oldest_) {\n        this.oldest_.older = null;\n      }\n    } else {\n      entry.newer.older = entry.older;\n      entry.older.newer = entry.newer;\n    }\n    delete this.entries_[key];\n    --this.count_;\n    return entry.value_;\n  };\n\n\n  /**\n   * @return {number} Count.\n   */\n  LRUCache.prototype.getCount = function getCount () {\n    return this.count_;\n  };\n\n\n  /**\n   * @return {Array<string>} Keys.\n   */\n  LRUCache.prototype.getKeys = function getKeys () {\n    var keys = new Array(this.count_);\n    var i = 0;\n    var entry;\n    for (entry = this.newest_; entry; entry = entry.older) {\n      keys[i++] = entry.key_;\n    }\n    return keys;\n  };\n\n\n  /**\n   * @return {Array<T>} Values.\n   */\n  LRUCache.prototype.getValues = function getValues () {\n    var values = new Array(this.count_);\n    var i = 0;\n    var entry;\n    for (entry = this.newest_; entry; entry = entry.older) {\n      values[i++] = entry.value_;\n    }\n    return values;\n  };\n\n\n  /**\n   * @return {T} Last value.\n   */\n  LRUCache.prototype.peekLast = function peekLast () {\n    return this.oldest_.value_;\n  };\n\n\n  /**\n   * @return {string} Last key.\n   */\n  LRUCache.prototype.peekLastKey = function peekLastKey () {\n    return this.oldest_.key_;\n  };\n\n\n  /**\n   * Get the key of the newest item in the cache.  Throws if the cache is empty.\n   * @return {string} The newest key.\n   */\n  LRUCache.prototype.peekFirstKey = function peekFirstKey () {\n    return this.newest_.key_;\n  };\n\n\n  /**\n   * @return {T} value Value.\n   */\n  LRUCache.prototype.pop = function pop () {\n    var entry = this.oldest_;\n    delete this.entries_[entry.key_];\n    if (entry.newer) {\n      entry.newer.older = null;\n    }\n    this.oldest_ = /** @type {Entry} */ (entry.newer);\n    if (!this.oldest_) {\n      this.newest_ = null;\n    }\n    --this.count_;\n    return entry.value_;\n  };\n\n\n  /**\n   * @param {string} key Key.\n   * @param {T} value Value.\n   */\n  LRUCache.prototype.replace = function replace (key, value) {\n    this.get(key); // update `newest_`\n    this.entries_[key].value_ = value;\n  };\n\n\n  /**\n   * @param {string} key Key.\n   * @param {T} value Value.\n   */\n  LRUCache.prototype.set = function set (key, value) {\n    assert(!(key in this.entries_),\n      16); // Tried to set a value for a key that is used already\n    var entry = /** @type {Entry} */ ({\n      key_: key,\n      newer: null,\n      older: this.newest_,\n      value_: value\n    });\n    if (!this.newest_) {\n      this.oldest_ = entry;\n    } else {\n      this.newest_.newer = entry;\n    }\n    this.newest_ = entry;\n    this.entries_[key] = entry;\n    ++this.count_;\n  };\n\n\n  /**\n   * Set a maximum number of entries for the cache.\n   * @param {number} size Cache size.\n   * @api\n   */\n  LRUCache.prototype.setSize = function setSize (size) {\n    this.highWaterMark = size;\n  };\n\n\n  /**\n   * Prune the cache.\n   */\n  LRUCache.prototype.prune = function prune () {\n    while (this.canExpireCache()) {\n      this.pop();\n    }\n  };\n\n  return LRUCache;\n}(EventTarget));\n\nexport default LRUCache;\n\n//# sourceMappingURL=LRUCache.js.map","/**\n * @module ol/render/canvas\n */\nimport {getFontFamilies} from '../css.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {clear} from '../obj.js';\nimport LRUCache from '../structs/LRUCache.js';\nimport {create as createTransform} from '../transform.js';\n\n\n/**\n * @typedef {Object} FillState\n * @property {import(\"../colorlike.js\").ColorLike} fillStyle\n */\n\n\n/**\n * @typedef {Object} FillStrokeState\n * @property {import(\"../colorlike.js\").ColorLike} [currentFillStyle]\n * @property {import(\"../colorlike.js\").ColorLike} [currentStrokeStyle]\n * @property {string} [currentLineCap]\n * @property {Array<number>} currentLineDash\n * @property {number} [currentLineDashOffset]\n * @property {string} [currentLineJoin]\n * @property {number} [currentLineWidth]\n * @property {number} [currentMiterLimit]\n * @property {number} [lastStroke]\n * @property {import(\"../colorlike.js\").ColorLike} [fillStyle]\n * @property {import(\"../colorlike.js\").ColorLike} [strokeStyle]\n * @property {string} [lineCap]\n * @property {Array<number>} lineDash\n * @property {number} [lineDashOffset]\n * @property {string} [lineJoin]\n * @property {number} [lineWidth]\n * @property {number} [miterLimit]\n */\n\n\n/**\n * @typedef {Object} StrokeState\n * @property {string} lineCap\n * @property {Array<number>} lineDash\n * @property {number} lineDashOffset\n * @property {string} lineJoin\n * @property {number} lineWidth\n * @property {number} miterLimit\n * @property {import(\"../colorlike.js\").ColorLike} strokeStyle\n */\n\n\n/**\n * @typedef {Object} TextState\n * @property {string} font\n * @property {string} [textAlign]\n * @property {string} textBaseline\n * @property {string} [placement]\n * @property {number} [maxAngle]\n * @property {boolean} [overflow]\n * @property {import(\"../style/Fill.js\").default} [backgroundFill]\n * @property {import(\"../style/Stroke.js\").default} [backgroundStroke]\n * @property {number} [scale]\n * @property {Array<number>} [padding]\n */\n\n\n/**\n * Container for decluttered replay instructions that need to be rendered or\n * omitted together, i.e. when styles render both an image and text, or for the\n * characters that form text along lines. The basic elements of this array are\n * `[minX, minY, maxX, maxY, count]`, where the first four entries are the\n * rendered extent of the group in pixel space. `count` is the number of styles\n * in the group, i.e. 2 when an image and a text are grouped, or 1 otherwise.\n * In addition to these four elements, declutter instruction arrays (i.e. the\n * arguments to {@link module:ol/render/canvas~drawImage} are appended to the array.\n * @typedef {Array<*>} DeclutterGroup\n */\n\n\n/**\n * @const\n * @type {string}\n */\nexport var defaultFont = '10px sans-serif';\n\n\n/**\n * @const\n * @type {import(\"../color.js\").Color}\n */\nexport var defaultFillStyle = [0, 0, 0, 1];\n\n\n/**\n * @const\n * @type {string}\n */\nexport var defaultLineCap = 'round';\n\n\n/**\n * @const\n * @type {Array<number>}\n */\nexport var defaultLineDash = [];\n\n\n/**\n * @const\n * @type {number}\n */\nexport var defaultLineDashOffset = 0;\n\n\n/**\n * @const\n * @type {string}\n */\nexport var defaultLineJoin = 'round';\n\n\n/**\n * @const\n * @type {number}\n */\nexport var defaultMiterLimit = 10;\n\n\n/**\n * @const\n * @type {import(\"../color.js\").Color}\n */\nexport var defaultStrokeStyle = [0, 0, 0, 1];\n\n\n/**\n * @const\n * @type {string}\n */\nexport var defaultTextAlign = 'center';\n\n\n/**\n * @const\n * @type {string}\n */\nexport var defaultTextBaseline = 'middle';\n\n\n/**\n * @const\n * @type {Array<number>}\n */\nexport var defaultPadding = [0, 0, 0, 0];\n\n\n/**\n * @const\n * @type {number}\n */\nexport var defaultLineWidth = 1;\n\n\n/**\n * The label cache for text rendering. To change the default cache size of 2048\n * entries, use {@link module:ol/structs/LRUCache#setSize}.\n * @type {LRUCache<HTMLCanvasElement>}\n * @api\n */\nexport var labelCache = new LRUCache();\n\n\n/**\n * @type {!Object<string, number>}\n */\nexport var checkedFonts = {};\n\n\n/**\n * @type {CanvasRenderingContext2D}\n */\nvar measureContext = null;\n\n\n/**\n * @type {!Object<string, number>}\n */\nexport var textHeights = {};\n\n\n/**\n * Clears the label cache when a font becomes available.\n * @param {string} fontSpec CSS font spec.\n */\nexport var checkFont = (function() {\n  var retries = 60;\n  var checked = checkedFonts;\n  var size = '32px ';\n  var referenceFonts = ['monospace', 'serif'];\n  var len = referenceFonts.length;\n  var text = 'wmytzilWMYTZIL@#/&?$%10\\uF013';\n  var interval, referenceWidth;\n\n  function isAvailable(font) {\n    var context = getMeasureContext();\n    // Check weight ranges according to\n    // https://developer.mozilla.org/en-US/docs/Web/CSS/font-weight#Fallback_weights\n    for (var weight = 100; weight <= 700; weight += 300) {\n      var fontWeight = weight + ' ';\n      var available = true;\n      for (var i = 0; i < len; ++i) {\n        var referenceFont = referenceFonts[i];\n        context.font = fontWeight + size + referenceFont;\n        referenceWidth = context.measureText(text).width;\n        if (font != referenceFont) {\n          context.font = fontWeight + size + font + ',' + referenceFont;\n          var width = context.measureText(text).width;\n          // If width and referenceWidth are the same, then the fallback was used\n          // instead of the font we wanted, so the font is not available.\n          available = available && width != referenceWidth;\n        }\n      }\n      if (available) {\n        // Consider font available when it is available in one weight range.\n        //FIXME With this we miss rare corner cases, so we should consider\n        //FIXME checking availability for each requested weight range.\n        return true;\n      }\n    }\n    return false;\n  }\n\n  function check() {\n    var done = true;\n    for (var font in checked) {\n      if (checked[font] < retries) {\n        if (isAvailable(font)) {\n          checked[font] = retries;\n          clear(textHeights);\n          // Make sure that loaded fonts are picked up by Safari\n          measureContext = null;\n          labelCache.clear();\n        } else {\n          ++checked[font];\n          done = false;\n        }\n      }\n    }\n    if (done) {\n      clearInterval(interval);\n      interval = undefined;\n    }\n  }\n\n  return function(fontSpec) {\n    var fontFamilies = getFontFamilies(fontSpec);\n    if (!fontFamilies) {\n      return;\n    }\n    for (var i = 0, ii = fontFamilies.length; i < ii; ++i) {\n      var fontFamily = fontFamilies[i];\n      if (!(fontFamily in checked)) {\n        checked[fontFamily] = retries;\n        if (!isAvailable(fontFamily)) {\n          checked[fontFamily] = 0;\n          if (interval === undefined) {\n            interval = setInterval(check, 32);\n          }\n        }\n      }\n    }\n  };\n})();\n\n\n/**\n * @return {CanvasRenderingContext2D} Measure context.\n */\nfunction getMeasureContext() {\n  if (!measureContext) {\n    measureContext = createCanvasContext2D(1, 1);\n  }\n  return measureContext;\n}\n\n\n/**\n * @param {string} font Font to use for measuring.\n * @return {import(\"../size.js\").Size} Measurement.\n */\nexport var measureTextHeight = (function() {\n  var span;\n  var heights = textHeights;\n  return function(font) {\n    var height = heights[font];\n    if (height == undefined) {\n      if (!span) {\n        span = document.createElement('span');\n        span.textContent = 'M';\n        span.style.margin = span.style.padding = '0 !important';\n        span.style.position = 'absolute !important';\n        span.style.left = '-99999px !important';\n      }\n      span.style.font = font;\n      document.body.appendChild(span);\n      height = heights[font] = span.offsetHeight;\n      document.body.removeChild(span);\n    }\n    return height;\n  };\n})();\n\n\n/**\n * @param {string} font Font.\n * @param {string} text Text.\n * @return {number} Width.\n */\nexport function measureTextWidth(font, text) {\n  var measureContext = getMeasureContext();\n  if (font != measureContext.font) {\n    measureContext.font = font;\n  }\n  return measureContext.measureText(text).width;\n}\n\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {number} rotation Rotation.\n * @param {number} offsetX X offset.\n * @param {number} offsetY Y offset.\n */\nexport function rotateAtOffset(context, rotation, offsetX, offsetY) {\n  if (rotation !== 0) {\n    context.translate(offsetX, offsetY);\n    context.rotate(rotation);\n    context.translate(-offsetX, -offsetY);\n  }\n}\n\n\nexport var resetTransform = createTransform();\n\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {import(\"../transform.js\").Transform|null} transform Transform.\n * @param {number} opacity Opacity.\n * @param {HTMLImageElement|HTMLCanvasElement|HTMLVideoElement} image Image.\n * @param {number} originX Origin X.\n * @param {number} originY Origin Y.\n * @param {number} w Width.\n * @param {number} h Height.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {number} scale Scale.\n */\nexport function drawImage(context,\n  transform, opacity, image, originX, originY, w, h, x, y, scale) {\n  var alpha;\n  if (opacity != 1) {\n    alpha = context.globalAlpha;\n    context.globalAlpha = alpha * opacity;\n  }\n  if (transform) {\n    context.setTransform.apply(context, transform);\n  }\n\n  context.drawImage(image, originX, originY, w, h, x, y, w * scale, h * scale);\n\n  if (alpha) {\n    context.globalAlpha = alpha;\n  }\n  if (transform) {\n    context.setTransform.apply(context, resetTransform);\n  }\n}\n\n//# sourceMappingURL=canvas.js.map","/**\n * @module ol/color\n */\nimport {assert} from './asserts.js';\nimport {clamp} from './math.js';\n\n\n/**\n * A color represented as a short array [red, green, blue, alpha].\n * red, green, and blue should be integers in the range 0..255 inclusive.\n * alpha should be a float in the range 0..1 inclusive. If no alpha value is\n * given then `1` will be used.\n * @typedef {Array<number>} Color\n * @api\n */\n\n\n/**\n * This RegExp matches # followed by 3, 4, 6, or 8 hex digits.\n * @const\n * @type {RegExp}\n * @private\n */\nvar HEX_COLOR_RE_ = /^#([a-f0-9]{3}|[a-f0-9]{4}(?:[a-f0-9]{2}){0,2})$/i;\n\n\n/**\n * Regular expression for matching potential named color style strings.\n * @const\n * @type {RegExp}\n * @private\n */\nvar NAMED_COLOR_RE_ = /^([a-z]*)$/i;\n\n\n/**\n * Return the color as an rgba string.\n * @param {Color|string} color Color.\n * @return {string} Rgba string.\n * @api\n */\nexport function asString(color) {\n  if (typeof color === 'string') {\n    return color;\n  } else {\n    return toString(color);\n  }\n}\n\n/**\n * Return named color as an rgba string.\n * @param {string} color Named color.\n * @return {string} Rgb string.\n */\nfunction fromNamed(color) {\n  var el = document.createElement('div');\n  el.style.color = color;\n  if (el.style.color !== '') {\n    document.body.appendChild(el);\n    var rgb = getComputedStyle(el).color;\n    document.body.removeChild(el);\n    return rgb;\n  } else {\n    return '';\n  }\n}\n\n\n/**\n * @param {string} s String.\n * @return {Color} Color.\n */\nexport var fromString = (\n  function() {\n\n    // We maintain a small cache of parsed strings.  To provide cheap LRU-like\n    // semantics, whenever the cache grows too large we simply delete an\n    // arbitrary 25% of the entries.\n\n    /**\n     * @const\n     * @type {number}\n     */\n    var MAX_CACHE_SIZE = 1024;\n\n    /**\n     * @type {Object<string, Color>}\n     */\n    var cache = {};\n\n    /**\n     * @type {number}\n     */\n    var cacheSize = 0;\n\n    return (\n      /**\n       * @param {string} s String.\n       * @return {Color} Color.\n       */\n      function(s) {\n        var color;\n        if (cache.hasOwnProperty(s)) {\n          color = cache[s];\n        } else {\n          if (cacheSize >= MAX_CACHE_SIZE) {\n            var i = 0;\n            for (var key in cache) {\n              if ((i++ & 3) === 0) {\n                delete cache[key];\n                --cacheSize;\n              }\n            }\n          }\n          color = fromStringInternal_(s);\n          cache[s] = color;\n          ++cacheSize;\n        }\n        return color;\n      }\n    );\n\n  })();\n\n/**\n * Return the color as an array. This function maintains a cache of calculated\n * arrays which means the result should not be modified.\n * @param {Color|string} color Color.\n * @return {Color} Color.\n * @api\n */\nexport function asArray(color) {\n  if (Array.isArray(color)) {\n    return color;\n  } else {\n    return fromString(color);\n  }\n}\n\n/**\n * @param {string} s String.\n * @private\n * @return {Color} Color.\n */\nfunction fromStringInternal_(s) {\n  var r, g, b, a, color;\n\n  if (NAMED_COLOR_RE_.exec(s)) {\n    s = fromNamed(s);\n  }\n\n  if (HEX_COLOR_RE_.exec(s)) { // hex\n    var n = s.length - 1; // number of hex digits\n    var d; // number of digits per channel\n    if (n <= 4) {\n      d = 1;\n    } else {\n      d = 2;\n    }\n    var hasAlpha = n === 4 || n === 8;\n    r = parseInt(s.substr(1 + 0 * d, d), 16);\n    g = parseInt(s.substr(1 + 1 * d, d), 16);\n    b = parseInt(s.substr(1 + 2 * d, d), 16);\n    if (hasAlpha) {\n      a = parseInt(s.substr(1 + 3 * d, d), 16);\n    } else {\n      a = 255;\n    }\n    if (d == 1) {\n      r = (r << 4) + r;\n      g = (g << 4) + g;\n      b = (b << 4) + b;\n      if (hasAlpha) {\n        a = (a << 4) + a;\n      }\n    }\n    color = [r, g, b, a / 255];\n  } else if (s.indexOf('rgba(') == 0) { // rgba()\n    color = s.slice(5, -1).split(',').map(Number);\n    normalize(color);\n  } else if (s.indexOf('rgb(') == 0) { // rgb()\n    color = s.slice(4, -1).split(',').map(Number);\n    color.push(1);\n    normalize(color);\n  } else {\n    assert(false, 14); // Invalid color\n  }\n  return color;\n}\n\n\n/**\n * TODO this function is only used in the test, we probably shouldn't export it\n * @param {Color} color Color.\n * @return {Color} Clamped color.\n */\nexport function normalize(color) {\n  color[0] = clamp((color[0] + 0.5) | 0, 0, 255);\n  color[1] = clamp((color[1] + 0.5) | 0, 0, 255);\n  color[2] = clamp((color[2] + 0.5) | 0, 0, 255);\n  color[3] = clamp(color[3], 0, 1);\n  return color;\n}\n\n\n/**\n * @param {Color} color Color.\n * @return {string} String.\n */\nexport function toString(color) {\n  var r = color[0];\n  if (r != (r | 0)) {\n    r = (r + 0.5) | 0;\n  }\n  var g = color[1];\n  if (g != (g | 0)) {\n    g = (g + 0.5) | 0;\n  }\n  var b = color[2];\n  if (b != (b | 0)) {\n    b = (b + 0.5) | 0;\n  }\n  var a = color[3] === undefined ? 1 : color[3];\n  return 'rgba(' + r + ',' + g + ',' + b + ',' + a + ')';\n}\n\n//# sourceMappingURL=color.js.map","/**\n * @module ol/colorlike\n */\nimport {toString} from './color.js';\n\n\n/**\n * A type accepted by CanvasRenderingContext2D.fillStyle\n * or CanvasRenderingContext2D.strokeStyle.\n * Represents a color, pattern, or gradient. The origin for patterns and\n * gradients as fill style is an increment of 512 css pixels from map coordinate\n * `[0, 0]`. For seamless repeat patterns, width and height of the pattern image\n * must be a factor of two (2, 4, 8, ..., 512).\n *\n * @typedef {string|CanvasPattern|CanvasGradient} ColorLike\n * @api\n */\n\n\n/**\n * @param {import(\"./color.js\").Color|ColorLike} color Color.\n * @return {ColorLike} The color as an {@link ol/colorlike~ColorLike}.\n * @api\n */\nexport function asColorLike(color) {\n  if (Array.isArray(color)) {\n    return toString(color);\n  } else {\n    return color;\n  }\n}\n\n//# sourceMappingURL=colorlike.js.map","/**\n * @module ol/render/VectorContext\n */\n\n/**\n * @classdesc\n * Context for drawing geometries.  A vector context is available on render\n * events and does not need to be constructed directly.\n * @api\n */\nvar VectorContext = function VectorContext () {};\n\nVectorContext.prototype.drawCustom = function drawCustom (geometry, feature, renderer) {};\n\n/**\n * Render a geometry.\n *\n * @param {import(\"../geom/Geometry.js\").default} geometry The geometry to render.\n */\nVectorContext.prototype.drawGeometry = function drawGeometry (geometry) {};\n\n/**\n * Set the rendering style.\n *\n * @param {import(\"../style/Style.js\").default} style The rendering style.\n */\nVectorContext.prototype.setStyle = function setStyle (style) {};\n\n/**\n * @param {import(\"../geom/Circle.js\").default} circleGeometry Circle geometry.\n * @param {import(\"../Feature.js\").default} feature Feature.\n */\nVectorContext.prototype.drawCircle = function drawCircle (circleGeometry, feature) {};\n\n/**\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {import(\"../style/Style.js\").default} style Style.\n */\nVectorContext.prototype.drawFeature = function drawFeature (feature, style) {};\n\n/**\n * @param {import(\"../geom/GeometryCollection.js\").default} geometryCollectionGeometry Geometry collection.\n * @param {import(\"../Feature.js\").default} feature Feature.\n */\nVectorContext.prototype.drawGeometryCollection = function drawGeometryCollection (geometryCollectionGeometry, feature) {};\n\n/**\n * @param {import(\"../geom/LineString.js\").default|import(\"./Feature.js\").default} lineStringGeometry Line string geometry.\n * @param {import(\"../Feature.js\").default|import(\"./Feature.js\").default} feature Feature.\n */\nVectorContext.prototype.drawLineString = function drawLineString (lineStringGeometry, feature) {};\n\n/**\n * @param {import(\"../geom/MultiLineString.js\").default|import(\"./Feature.js\").default} multiLineStringGeometry MultiLineString geometry.\n * @param {import(\"../Feature.js\").default|import(\"./Feature.js\").default} feature Feature.\n */\nVectorContext.prototype.drawMultiLineString = function drawMultiLineString (multiLineStringGeometry, feature) {};\n\n/**\n * @param {import(\"../geom/MultiPoint.js\").default|import(\"./Feature.js\").default} multiPointGeometry MultiPoint geometry.\n * @param {import(\"../Feature.js\").default|import(\"./Feature.js\").default} feature Feature.\n */\nVectorContext.prototype.drawMultiPoint = function drawMultiPoint (multiPointGeometry, feature) {};\n\n/**\n * @param {import(\"../geom/MultiPolygon.js\").default} multiPolygonGeometry MultiPolygon geometry.\n * @param {import(\"../Feature.js\").default|import(\"./Feature.js\").default} feature Feature.\n */\nVectorContext.prototype.drawMultiPolygon = function drawMultiPolygon (multiPolygonGeometry, feature) {};\n\n/**\n * @param {import(\"../geom/Point.js\").default|import(\"./Feature.js\").default} pointGeometry Point geometry.\n * @param {import(\"../Feature.js\").default|import(\"./Feature.js\").default} feature Feature.\n */\nVectorContext.prototype.drawPoint = function drawPoint (pointGeometry, feature) {};\n\n/**\n * @param {import(\"../geom/Polygon.js\").default|import(\"./Feature.js\").default} polygonGeometry Polygon geometry.\n * @param {import(\"../Feature.js\").default|import(\"./Feature.js\").default} feature Feature.\n */\nVectorContext.prototype.drawPolygon = function drawPolygon (polygonGeometry, feature) {};\n\n/**\n * @param {import(\"../geom/Geometry.js\").default|import(\"./Feature.js\").default} geometry Geometry.\n * @param {import(\"../Feature.js\").default|import(\"./Feature.js\").default} feature Feature.\n */\nVectorContext.prototype.drawText = function drawText (geometry, feature) {};\n\n/**\n * @param {import(\"../style/Fill.js\").default} fillStyle Fill style.\n * @param {import(\"../style/Stroke.js\").default} strokeStyle Stroke style.\n */\nVectorContext.prototype.setFillStrokeStyle = function setFillStrokeStyle (fillStyle, strokeStyle) {};\n\n/**\n * @param {import(\"../style/Image.js\").default} imageStyle Image style.\n * @param {import(\"./canvas.js\").DeclutterGroup=} opt_declutterGroup Declutter.\n */\nVectorContext.prototype.setImageStyle = function setImageStyle (imageStyle, opt_declutterGroup) {};\n\n/**\n * @param {import(\"../style/Text.js\").default} textStyle Text style.\n * @param {import(\"./canvas.js\").DeclutterGroup=} opt_declutterGroup Declutter.\n */\nVectorContext.prototype.setTextStyle = function setTextStyle (textStyle, opt_declutterGroup) {};\n\nexport default VectorContext;\n\n//# sourceMappingURL=VectorContext.js.map","/**\n * @module ol/render/canvas/Immediate\n */\n// FIXME test, especially polygons with holes and multipolygons\n// FIXME need to handle large thick features (where pixel size matters)\n// FIXME add offset and end to ol/geom/flat/transform~transform2D?\n\nimport {equals} from '../../array.js';\nimport {asColorLike} from '../../colorlike.js';\nimport {intersects} from '../../extent.js';\nimport GeometryType from '../../geom/GeometryType.js';\nimport {transformGeom2D} from '../../geom/SimpleGeometry.js';\nimport {transform2D} from '../../geom/flat/transform.js';\nimport {CANVAS_LINE_DASH} from '../../has.js';\nimport VectorContext from '../VectorContext.js';\nimport {defaultTextAlign, defaultFillStyle, defaultLineCap, defaultLineDash, defaultLineDashOffset, defaultLineJoin, defaultLineWidth, defaultMiterLimit, defaultStrokeStyle, defaultTextBaseline, defaultFont} from '../canvas.js';\nimport {create as createTransform, compose as composeTransform} from '../../transform.js';\n\n/**\n * @classdesc\n * A concrete subclass of {@link module:ol/render/VectorContext} that implements\n * direct rendering of features and geometries to an HTML5 Canvas context.\n * Instances of this class are created internally by the library and\n * provided to application code as vectorContext member of the\n * {@link module:ol/render/Event~RenderEvent} object associated with postcompose, precompose and\n * render events emitted by layers and maps.\n */\nvar CanvasImmediateRenderer = /*@__PURE__*/(function (VectorContext) {\n  function CanvasImmediateRenderer(context, pixelRatio, extent, transform, viewRotation) {\n    VectorContext.call(this);\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.context_ = context;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.pixelRatio_ = pixelRatio;\n\n    /**\n     * @private\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.extent_ = extent;\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.transform_ = transform;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.viewRotation_ = viewRotation;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").FillState}\n     */\n    this.contextFillState_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").StrokeState}\n     */\n    this.contextStrokeState_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").TextState}\n     */\n    this.contextTextState_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").FillState}\n     */\n    this.fillState_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").StrokeState}\n     */\n    this.strokeState_ = null;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement}\n     */\n    this.image_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageAnchorX_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageAnchorY_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageHeight_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageOpacity_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageOriginX_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageOriginY_ = 0;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.imageRotateWithView_ = false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageRotation_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageScale_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageWidth_ = 0;\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.text_ = '';\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textOffsetX_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textOffsetY_ = 0;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.textRotateWithView_ = false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textRotation_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textScale_ = 0;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").FillState}\n     */\n    this.textFillState_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").StrokeState}\n     */\n    this.textStrokeState_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").TextState}\n     */\n    this.textState_ = null;\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.pixelCoordinates_ = [];\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.tmpLocalTransform_ = createTransform();\n\n  }\n\n  if ( VectorContext ) CanvasImmediateRenderer.__proto__ = VectorContext;\n  CanvasImmediateRenderer.prototype = Object.create( VectorContext && VectorContext.prototype );\n  CanvasImmediateRenderer.prototype.constructor = CanvasImmediateRenderer;\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @private\n   */\n  CanvasImmediateRenderer.prototype.drawImages_ = function drawImages_ (flatCoordinates, offset, end, stride) {\n    if (!this.image_) {\n      return;\n    }\n    var pixelCoordinates = transform2D(\n      flatCoordinates, offset, end, 2, this.transform_,\n      this.pixelCoordinates_);\n    var context = this.context_;\n    var localTransform = this.tmpLocalTransform_;\n    var alpha = context.globalAlpha;\n    if (this.imageOpacity_ != 1) {\n      context.globalAlpha = alpha * this.imageOpacity_;\n    }\n    var rotation = this.imageRotation_;\n    if (this.imageRotateWithView_) {\n      rotation += this.viewRotation_;\n    }\n    for (var i = 0, ii = pixelCoordinates.length; i < ii; i += 2) {\n      var x = pixelCoordinates[i] - this.imageAnchorX_;\n      var y = pixelCoordinates[i + 1] - this.imageAnchorY_;\n      if (rotation !== 0 || this.imageScale_ != 1) {\n        var centerX = x + this.imageAnchorX_;\n        var centerY = y + this.imageAnchorY_;\n        composeTransform(localTransform,\n          centerX, centerY,\n          this.imageScale_, this.imageScale_,\n          rotation,\n          -centerX, -centerY);\n        context.setTransform.apply(context, localTransform);\n      }\n      context.drawImage(this.image_, this.imageOriginX_, this.imageOriginY_,\n        this.imageWidth_, this.imageHeight_, x, y,\n        this.imageWidth_, this.imageHeight_);\n    }\n    if (rotation !== 0 || this.imageScale_ != 1) {\n      context.setTransform(1, 0, 0, 1, 0, 0);\n    }\n    if (this.imageOpacity_ != 1) {\n      context.globalAlpha = alpha;\n    }\n  };\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @private\n   */\n  CanvasImmediateRenderer.prototype.drawText_ = function drawText_ (flatCoordinates, offset, end, stride) {\n    if (!this.textState_ || this.text_ === '') {\n      return;\n    }\n    if (this.textFillState_) {\n      this.setContextFillState_(this.textFillState_);\n    }\n    if (this.textStrokeState_) {\n      this.setContextStrokeState_(this.textStrokeState_);\n    }\n    this.setContextTextState_(this.textState_);\n    var pixelCoordinates = transform2D(\n      flatCoordinates, offset, end, stride, this.transform_,\n      this.pixelCoordinates_);\n    var context = this.context_;\n    var rotation = this.textRotation_;\n    if (this.textRotateWithView_) {\n      rotation += this.viewRotation_;\n    }\n    for (; offset < end; offset += stride) {\n      var x = pixelCoordinates[offset] + this.textOffsetX_;\n      var y = pixelCoordinates[offset + 1] + this.textOffsetY_;\n      if (rotation !== 0 || this.textScale_ != 1) {\n        var localTransform = composeTransform(this.tmpLocalTransform_,\n          x, y,\n          this.textScale_, this.textScale_,\n          rotation,\n          -x, -y);\n        context.setTransform.apply(context, localTransform);\n      }\n      if (this.textStrokeState_) {\n        context.strokeText(this.text_, x, y);\n      }\n      if (this.textFillState_) {\n        context.fillText(this.text_, x, y);\n      }\n    }\n    if (rotation !== 0 || this.textScale_ != 1) {\n      context.setTransform(1, 0, 0, 1, 0, 0);\n    }\n  };\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @param {boolean} close Close.\n   * @private\n   * @return {number} end End.\n   */\n  CanvasImmediateRenderer.prototype.moveToLineTo_ = function moveToLineTo_ (flatCoordinates, offset, end, stride, close) {\n    var context = this.context_;\n    var pixelCoordinates = transform2D(\n      flatCoordinates, offset, end, stride, this.transform_,\n      this.pixelCoordinates_);\n    context.moveTo(pixelCoordinates[0], pixelCoordinates[1]);\n    var length = pixelCoordinates.length;\n    if (close) {\n      length -= 2;\n    }\n    for (var i = 2; i < length; i += 2) {\n      context.lineTo(pixelCoordinates[i], pixelCoordinates[i + 1]);\n    }\n    if (close) {\n      context.closePath();\n    }\n    return end;\n  };\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {Array<number>} ends Ends.\n   * @param {number} stride Stride.\n   * @private\n   * @return {number} End.\n   */\n  CanvasImmediateRenderer.prototype.drawRings_ = function drawRings_ (flatCoordinates, offset, ends, stride) {\n    for (var i = 0, ii = ends.length; i < ii; ++i) {\n      offset = this.moveToLineTo_(flatCoordinates, offset, ends[i], stride, true);\n    }\n    return offset;\n  };\n\n  /**\n   * Render a circle geometry into the canvas.  Rendering is immediate and uses\n   * the current fill and stroke styles.\n   *\n   * @param {import(\"../../geom/Circle.js\").default} geometry Circle geometry.\n   * @override\n   * @api\n   */\n  CanvasImmediateRenderer.prototype.drawCircle = function drawCircle (geometry) {\n    if (!intersects(this.extent_, geometry.getExtent())) {\n      return;\n    }\n    if (this.fillState_ || this.strokeState_) {\n      if (this.fillState_) {\n        this.setContextFillState_(this.fillState_);\n      }\n      if (this.strokeState_) {\n        this.setContextStrokeState_(this.strokeState_);\n      }\n      var pixelCoordinates = transformGeom2D(\n        geometry, this.transform_, this.pixelCoordinates_);\n      var dx = pixelCoordinates[2] - pixelCoordinates[0];\n      var dy = pixelCoordinates[3] - pixelCoordinates[1];\n      var radius = Math.sqrt(dx * dx + dy * dy);\n      var context = this.context_;\n      context.beginPath();\n      context.arc(\n        pixelCoordinates[0], pixelCoordinates[1], radius, 0, 2 * Math.PI);\n      if (this.fillState_) {\n        context.fill();\n      }\n      if (this.strokeState_) {\n        context.stroke();\n      }\n    }\n    if (this.text_ !== '') {\n      this.drawText_(geometry.getCenter(), 0, 2, 2);\n    }\n  };\n\n  /**\n   * Set the rendering style.  Note that since this is an immediate rendering API,\n   * any `zIndex` on the provided style will be ignored.\n   *\n   * @param {import(\"../../style/Style.js\").default} style The rendering style.\n   * @override\n   * @api\n   */\n  CanvasImmediateRenderer.prototype.setStyle = function setStyle (style) {\n    this.setFillStrokeStyle(style.getFill(), style.getStroke());\n    this.setImageStyle(style.getImage());\n    this.setTextStyle(style.getText());\n  };\n\n  /**\n   * Render a geometry into the canvas.  Call\n   * {@link module:ol/render/canvas/Immediate#setStyle} first to set the rendering style.\n   *\n   * @param {import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default} geometry The geometry to render.\n   * @override\n   * @api\n   */\n  CanvasImmediateRenderer.prototype.drawGeometry = function drawGeometry (geometry) {\n    var type = geometry.getType();\n    switch (type) {\n      case GeometryType.POINT:\n        this.drawPoint(/** @type {import(\"../../geom/Point.js\").default} */ (geometry));\n        break;\n      case GeometryType.LINE_STRING:\n        this.drawLineString(/** @type {import(\"../../geom/LineString.js\").default} */ (geometry));\n        break;\n      case GeometryType.POLYGON:\n        this.drawPolygon(/** @type {import(\"../../geom/Polygon.js\").default} */ (geometry));\n        break;\n      case GeometryType.MULTI_POINT:\n        this.drawMultiPoint(/** @type {import(\"../../geom/MultiPoint.js\").default} */ (geometry));\n        break;\n      case GeometryType.MULTI_LINE_STRING:\n        this.drawMultiLineString(/** @type {import(\"../../geom/MultiLineString.js\").default} */ (geometry));\n        break;\n      case GeometryType.MULTI_POLYGON:\n        this.drawMultiPolygon(/** @type {import(\"../../geom/MultiPolygon.js\").default} */ (geometry));\n        break;\n      case GeometryType.GEOMETRY_COLLECTION:\n        this.drawGeometryCollection(/** @type {import(\"../../geom/GeometryCollection.js\").default} */ (geometry));\n        break;\n      case GeometryType.CIRCLE:\n        this.drawCircle(/** @type {import(\"../../geom/Circle.js\").default} */ (geometry));\n        break;\n      default:\n    }\n  };\n\n  /**\n   * Render a feature into the canvas.  Note that any `zIndex` on the provided\n   * style will be ignored - features are rendered immediately in the order that\n   * this method is called.  If you need `zIndex` support, you should be using an\n   * {@link module:ol/layer/Vector~VectorLayer} instead.\n   *\n   * @param {import(\"../../Feature.js\").default} feature Feature.\n   * @param {import(\"../../style/Style.js\").default} style Style.\n   * @override\n   * @api\n   */\n  CanvasImmediateRenderer.prototype.drawFeature = function drawFeature (feature, style) {\n    var geometry = style.getGeometryFunction()(feature);\n    if (!geometry || !intersects(this.extent_, geometry.getExtent())) {\n      return;\n    }\n    this.setStyle(style);\n    this.drawGeometry(geometry);\n  };\n\n  /**\n   * Render a GeometryCollection to the canvas.  Rendering is immediate and\n   * uses the current styles appropriate for each geometry in the collection.\n   *\n   * @param {import(\"../../geom/GeometryCollection.js\").default} geometry Geometry collection.\n   * @override\n   */\n  CanvasImmediateRenderer.prototype.drawGeometryCollection = function drawGeometryCollection (geometry) {\n    var geometries = geometry.getGeometriesArray();\n    for (var i = 0, ii = geometries.length; i < ii; ++i) {\n      this.drawGeometry(geometries[i]);\n    }\n  };\n\n  /**\n   * Render a Point geometry into the canvas.  Rendering is immediate and uses\n   * the current style.\n   *\n   * @param {import(\"../../geom/Point.js\").default|import(\"../Feature.js\").default} geometry Point geometry.\n   * @override\n   */\n  CanvasImmediateRenderer.prototype.drawPoint = function drawPoint (geometry) {\n    var flatCoordinates = geometry.getFlatCoordinates();\n    var stride = geometry.getStride();\n    if (this.image_) {\n      this.drawImages_(flatCoordinates, 0, flatCoordinates.length, stride);\n    }\n    if (this.text_ !== '') {\n      this.drawText_(flatCoordinates, 0, flatCoordinates.length, stride);\n    }\n  };\n\n  /**\n   * Render a MultiPoint geometry  into the canvas.  Rendering is immediate and\n   * uses the current style.\n   *\n   * @param {import(\"../../geom/MultiPoint.js\").default|import(\"../Feature.js\").default} geometry MultiPoint geometry.\n   * @override\n   */\n  CanvasImmediateRenderer.prototype.drawMultiPoint = function drawMultiPoint (geometry) {\n    var flatCoordinates = geometry.getFlatCoordinates();\n    var stride = geometry.getStride();\n    if (this.image_) {\n      this.drawImages_(flatCoordinates, 0, flatCoordinates.length, stride);\n    }\n    if (this.text_ !== '') {\n      this.drawText_(flatCoordinates, 0, flatCoordinates.length, stride);\n    }\n  };\n\n  /**\n   * Render a LineString into the canvas.  Rendering is immediate and uses\n   * the current style.\n   *\n   * @param {import(\"../../geom/LineString.js\").default|import(\"../Feature.js\").default} geometry LineString geometry.\n   * @override\n   */\n  CanvasImmediateRenderer.prototype.drawLineString = function drawLineString (geometry) {\n    if (!intersects(this.extent_, geometry.getExtent())) {\n      return;\n    }\n    if (this.strokeState_) {\n      this.setContextStrokeState_(this.strokeState_);\n      var context = this.context_;\n      var flatCoordinates = geometry.getFlatCoordinates();\n      context.beginPath();\n      this.moveToLineTo_(flatCoordinates, 0, flatCoordinates.length,\n        geometry.getStride(), false);\n      context.stroke();\n    }\n    if (this.text_ !== '') {\n      var flatMidpoint = geometry.getFlatMidpoint();\n      this.drawText_(flatMidpoint, 0, 2, 2);\n    }\n  };\n\n  /**\n   * Render a MultiLineString geometry into the canvas.  Rendering is immediate\n   * and uses the current style.\n   *\n   * @param {import(\"../../geom/MultiLineString.js\").default|import(\"../Feature.js\").default} geometry MultiLineString geometry.\n   * @override\n   */\n  CanvasImmediateRenderer.prototype.drawMultiLineString = function drawMultiLineString (geometry) {\n    var geometryExtent = geometry.getExtent();\n    if (!intersects(this.extent_, geometryExtent)) {\n      return;\n    }\n    if (this.strokeState_) {\n      this.setContextStrokeState_(this.strokeState_);\n      var context = this.context_;\n      var flatCoordinates = geometry.getFlatCoordinates();\n      var offset = 0;\n      var ends = /** @type {Array<number>} */ (geometry.getEnds());\n      var stride = geometry.getStride();\n      context.beginPath();\n      for (var i = 0, ii = ends.length; i < ii; ++i) {\n        offset = this.moveToLineTo_(flatCoordinates, offset, ends[i], stride, false);\n      }\n      context.stroke();\n    }\n    if (this.text_ !== '') {\n      var flatMidpoints = geometry.getFlatMidpoints();\n      this.drawText_(flatMidpoints, 0, flatMidpoints.length, 2);\n    }\n  };\n\n  /**\n   * Render a Polygon geometry into the canvas.  Rendering is immediate and uses\n   * the current style.\n   *\n   * @param {import(\"../../geom/Polygon.js\").default|import(\"../Feature.js\").default} geometry Polygon geometry.\n   * @override\n   */\n  CanvasImmediateRenderer.prototype.drawPolygon = function drawPolygon (geometry) {\n    if (!intersects(this.extent_, geometry.getExtent())) {\n      return;\n    }\n    if (this.strokeState_ || this.fillState_) {\n      if (this.fillState_) {\n        this.setContextFillState_(this.fillState_);\n      }\n      if (this.strokeState_) {\n        this.setContextStrokeState_(this.strokeState_);\n      }\n      var context = this.context_;\n      context.beginPath();\n      this.drawRings_(geometry.getOrientedFlatCoordinates(),\n        0, /** @type {Array<number>} */ (geometry.getEnds()), geometry.getStride());\n      if (this.fillState_) {\n        context.fill();\n      }\n      if (this.strokeState_) {\n        context.stroke();\n      }\n    }\n    if (this.text_ !== '') {\n      var flatInteriorPoint = geometry.getFlatInteriorPoint();\n      this.drawText_(flatInteriorPoint, 0, 2, 2);\n    }\n  };\n\n  /**\n   * Render MultiPolygon geometry into the canvas.  Rendering is immediate and\n   * uses the current style.\n   * @param {import(\"../../geom/MultiPolygon.js\").default} geometry MultiPolygon geometry.\n   * @override\n   */\n  CanvasImmediateRenderer.prototype.drawMultiPolygon = function drawMultiPolygon (geometry) {\n    if (!intersects(this.extent_, geometry.getExtent())) {\n      return;\n    }\n    if (this.strokeState_ || this.fillState_) {\n      if (this.fillState_) {\n        this.setContextFillState_(this.fillState_);\n      }\n      if (this.strokeState_) {\n        this.setContextStrokeState_(this.strokeState_);\n      }\n      var context = this.context_;\n      var flatCoordinates = geometry.getOrientedFlatCoordinates();\n      var offset = 0;\n      var endss = geometry.getEndss();\n      var stride = geometry.getStride();\n      context.beginPath();\n      for (var i = 0, ii = endss.length; i < ii; ++i) {\n        var ends = endss[i];\n        offset = this.drawRings_(flatCoordinates, offset, ends, stride);\n      }\n      if (this.fillState_) {\n        context.fill();\n      }\n      if (this.strokeState_) {\n        context.stroke();\n      }\n    }\n    if (this.text_ !== '') {\n      var flatInteriorPoints = geometry.getFlatInteriorPoints();\n      this.drawText_(flatInteriorPoints, 0, flatInteriorPoints.length, 2);\n    }\n  };\n\n  /**\n   * @param {import(\"../canvas.js\").FillState} fillState Fill state.\n   * @private\n   */\n  CanvasImmediateRenderer.prototype.setContextFillState_ = function setContextFillState_ (fillState) {\n    var context = this.context_;\n    var contextFillState = this.contextFillState_;\n    if (!contextFillState) {\n      context.fillStyle = fillState.fillStyle;\n      this.contextFillState_ = {\n        fillStyle: fillState.fillStyle\n      };\n    } else {\n      if (contextFillState.fillStyle != fillState.fillStyle) {\n        contextFillState.fillStyle = context.fillStyle = fillState.fillStyle;\n      }\n    }\n  };\n\n  /**\n   * @param {import(\"../canvas.js\").StrokeState} strokeState Stroke state.\n   * @private\n   */\n  CanvasImmediateRenderer.prototype.setContextStrokeState_ = function setContextStrokeState_ (strokeState) {\n    var context = this.context_;\n    var contextStrokeState = this.contextStrokeState_;\n    if (!contextStrokeState) {\n      context.lineCap = /** @type {CanvasLineCap} */ (strokeState.lineCap);\n      if (CANVAS_LINE_DASH) {\n        context.setLineDash(strokeState.lineDash);\n        context.lineDashOffset = strokeState.lineDashOffset;\n      }\n      context.lineJoin = /** @type {CanvasLineJoin} */ (strokeState.lineJoin);\n      context.lineWidth = strokeState.lineWidth;\n      context.miterLimit = strokeState.miterLimit;\n      context.strokeStyle = strokeState.strokeStyle;\n      this.contextStrokeState_ = {\n        lineCap: strokeState.lineCap,\n        lineDash: strokeState.lineDash,\n        lineDashOffset: strokeState.lineDashOffset,\n        lineJoin: strokeState.lineJoin,\n        lineWidth: strokeState.lineWidth,\n        miterLimit: strokeState.miterLimit,\n        strokeStyle: strokeState.strokeStyle\n      };\n    } else {\n      if (contextStrokeState.lineCap != strokeState.lineCap) {\n        contextStrokeState.lineCap = context.lineCap = /** @type {CanvasLineCap} */ (strokeState.lineCap);\n      }\n      if (CANVAS_LINE_DASH) {\n        if (!equals(contextStrokeState.lineDash, strokeState.lineDash)) {\n          context.setLineDash(contextStrokeState.lineDash = strokeState.lineDash);\n        }\n        if (contextStrokeState.lineDashOffset != strokeState.lineDashOffset) {\n          contextStrokeState.lineDashOffset = context.lineDashOffset =\n              strokeState.lineDashOffset;\n        }\n      }\n      if (contextStrokeState.lineJoin != strokeState.lineJoin) {\n        contextStrokeState.lineJoin = context.lineJoin = /** @type {CanvasLineJoin} */ (strokeState.lineJoin);\n      }\n      if (contextStrokeState.lineWidth != strokeState.lineWidth) {\n        contextStrokeState.lineWidth = context.lineWidth = strokeState.lineWidth;\n      }\n      if (contextStrokeState.miterLimit != strokeState.miterLimit) {\n        contextStrokeState.miterLimit = context.miterLimit =\n            strokeState.miterLimit;\n      }\n      if (contextStrokeState.strokeStyle != strokeState.strokeStyle) {\n        contextStrokeState.strokeStyle = context.strokeStyle =\n            strokeState.strokeStyle;\n      }\n    }\n  };\n\n  /**\n   * @param {import(\"../canvas.js\").TextState} textState Text state.\n   * @private\n   */\n  CanvasImmediateRenderer.prototype.setContextTextState_ = function setContextTextState_ (textState) {\n    var context = this.context_;\n    var contextTextState = this.contextTextState_;\n    var textAlign = textState.textAlign ?\n      textState.textAlign : defaultTextAlign;\n    if (!contextTextState) {\n      context.font = textState.font;\n      context.textAlign = /** @type {CanvasTextAlign} */ (textAlign);\n      context.textBaseline = /** @type {CanvasTextBaseline} */ (textState.textBaseline);\n      this.contextTextState_ = {\n        font: textState.font,\n        textAlign: textAlign,\n        textBaseline: textState.textBaseline\n      };\n    } else {\n      if (contextTextState.font != textState.font) {\n        contextTextState.font = context.font = textState.font;\n      }\n      if (contextTextState.textAlign != textAlign) {\n        contextTextState.textAlign = context.textAlign = /** @type {CanvasTextAlign} */ (textAlign);\n      }\n      if (contextTextState.textBaseline != textState.textBaseline) {\n        contextTextState.textBaseline = context.textBaseline =\n          /** @type {CanvasTextBaseline} */ (textState.textBaseline);\n      }\n    }\n  };\n\n  /**\n   * Set the fill and stroke style for subsequent draw operations.  To clear\n   * either fill or stroke styles, pass null for the appropriate parameter.\n   *\n   * @param {import(\"../../style/Fill.js\").default} fillStyle Fill style.\n   * @param {import(\"../../style/Stroke.js\").default} strokeStyle Stroke style.\n   * @override\n   */\n  CanvasImmediateRenderer.prototype.setFillStrokeStyle = function setFillStrokeStyle (fillStyle, strokeStyle) {\n    if (!fillStyle) {\n      this.fillState_ = null;\n    } else {\n      var fillStyleColor = fillStyle.getColor();\n      this.fillState_ = {\n        fillStyle: asColorLike(fillStyleColor ?\n          fillStyleColor : defaultFillStyle)\n      };\n    }\n    if (!strokeStyle) {\n      this.strokeState_ = null;\n    } else {\n      var strokeStyleColor = strokeStyle.getColor();\n      var strokeStyleLineCap = strokeStyle.getLineCap();\n      var strokeStyleLineDash = strokeStyle.getLineDash();\n      var strokeStyleLineDashOffset = strokeStyle.getLineDashOffset();\n      var strokeStyleLineJoin = strokeStyle.getLineJoin();\n      var strokeStyleWidth = strokeStyle.getWidth();\n      var strokeStyleMiterLimit = strokeStyle.getMiterLimit();\n      this.strokeState_ = {\n        lineCap: strokeStyleLineCap !== undefined ?\n          strokeStyleLineCap : defaultLineCap,\n        lineDash: strokeStyleLineDash ?\n          strokeStyleLineDash : defaultLineDash,\n        lineDashOffset: strokeStyleLineDashOffset ?\n          strokeStyleLineDashOffset : defaultLineDashOffset,\n        lineJoin: strokeStyleLineJoin !== undefined ?\n          strokeStyleLineJoin : defaultLineJoin,\n        lineWidth: this.pixelRatio_ * (strokeStyleWidth !== undefined ?\n          strokeStyleWidth : defaultLineWidth),\n        miterLimit: strokeStyleMiterLimit !== undefined ?\n          strokeStyleMiterLimit : defaultMiterLimit,\n        strokeStyle: asColorLike(strokeStyleColor ?\n          strokeStyleColor : defaultStrokeStyle)\n      };\n    }\n  };\n\n  /**\n   * Set the image style for subsequent draw operations.  Pass null to remove\n   * the image style.\n   *\n   * @param {import(\"../../style/Image.js\").default} imageStyle Image style.\n   * @override\n   */\n  CanvasImmediateRenderer.prototype.setImageStyle = function setImageStyle (imageStyle) {\n    if (!imageStyle) {\n      this.image_ = null;\n    } else {\n      var imageAnchor = imageStyle.getAnchor();\n      // FIXME pixel ratio\n      var imageImage = imageStyle.getImage(1);\n      var imageOrigin = imageStyle.getOrigin();\n      var imageSize = imageStyle.getSize();\n      this.imageAnchorX_ = imageAnchor[0];\n      this.imageAnchorY_ = imageAnchor[1];\n      this.imageHeight_ = imageSize[1];\n      this.image_ = imageImage;\n      this.imageOpacity_ = imageStyle.getOpacity();\n      this.imageOriginX_ = imageOrigin[0];\n      this.imageOriginY_ = imageOrigin[1];\n      this.imageRotateWithView_ = imageStyle.getRotateWithView();\n      this.imageRotation_ = imageStyle.getRotation();\n      this.imageScale_ = imageStyle.getScale() * this.pixelRatio_;\n      this.imageWidth_ = imageSize[0];\n    }\n  };\n\n  /**\n   * Set the text style for subsequent draw operations.  Pass null to\n   * remove the text style.\n   *\n   * @param {import(\"../../style/Text.js\").default} textStyle Text style.\n   * @override\n   */\n  CanvasImmediateRenderer.prototype.setTextStyle = function setTextStyle (textStyle) {\n    if (!textStyle) {\n      this.text_ = '';\n    } else {\n      var textFillStyle = textStyle.getFill();\n      if (!textFillStyle) {\n        this.textFillState_ = null;\n      } else {\n        var textFillStyleColor = textFillStyle.getColor();\n        this.textFillState_ = {\n          fillStyle: asColorLike(textFillStyleColor ?\n            textFillStyleColor : defaultFillStyle)\n        };\n      }\n      var textStrokeStyle = textStyle.getStroke();\n      if (!textStrokeStyle) {\n        this.textStrokeState_ = null;\n      } else {\n        var textStrokeStyleColor = textStrokeStyle.getColor();\n        var textStrokeStyleLineCap = textStrokeStyle.getLineCap();\n        var textStrokeStyleLineDash = textStrokeStyle.getLineDash();\n        var textStrokeStyleLineDashOffset = textStrokeStyle.getLineDashOffset();\n        var textStrokeStyleLineJoin = textStrokeStyle.getLineJoin();\n        var textStrokeStyleWidth = textStrokeStyle.getWidth();\n        var textStrokeStyleMiterLimit = textStrokeStyle.getMiterLimit();\n        this.textStrokeState_ = {\n          lineCap: textStrokeStyleLineCap !== undefined ?\n            textStrokeStyleLineCap : defaultLineCap,\n          lineDash: textStrokeStyleLineDash ?\n            textStrokeStyleLineDash : defaultLineDash,\n          lineDashOffset: textStrokeStyleLineDashOffset ?\n            textStrokeStyleLineDashOffset : defaultLineDashOffset,\n          lineJoin: textStrokeStyleLineJoin !== undefined ?\n            textStrokeStyleLineJoin : defaultLineJoin,\n          lineWidth: textStrokeStyleWidth !== undefined ?\n            textStrokeStyleWidth : defaultLineWidth,\n          miterLimit: textStrokeStyleMiterLimit !== undefined ?\n            textStrokeStyleMiterLimit : defaultMiterLimit,\n          strokeStyle: asColorLike(textStrokeStyleColor ?\n            textStrokeStyleColor : defaultStrokeStyle)\n        };\n      }\n      var textFont = textStyle.getFont();\n      var textOffsetX = textStyle.getOffsetX();\n      var textOffsetY = textStyle.getOffsetY();\n      var textRotateWithView = textStyle.getRotateWithView();\n      var textRotation = textStyle.getRotation();\n      var textScale = textStyle.getScale();\n      var textText = textStyle.getText();\n      var textTextAlign = textStyle.getTextAlign();\n      var textTextBaseline = textStyle.getTextBaseline();\n      this.textState_ = {\n        font: textFont !== undefined ?\n          textFont : defaultFont,\n        textAlign: textTextAlign !== undefined ?\n          textTextAlign : defaultTextAlign,\n        textBaseline: textTextBaseline !== undefined ?\n          textTextBaseline : defaultTextBaseline\n      };\n      this.text_ = textText !== undefined ? textText : '';\n      this.textOffsetX_ =\n          textOffsetX !== undefined ? (this.pixelRatio_ * textOffsetX) : 0;\n      this.textOffsetY_ =\n          textOffsetY !== undefined ? (this.pixelRatio_ * textOffsetY) : 0;\n      this.textRotateWithView_ = textRotateWithView !== undefined ? textRotateWithView : false;\n      this.textRotation_ = textRotation !== undefined ? textRotation : 0;\n      this.textScale_ = this.pixelRatio_ * (textScale !== undefined ?\n        textScale : 1);\n    }\n  };\n\n  return CanvasImmediateRenderer;\n}(VectorContext));\n\n\nexport default CanvasImmediateRenderer;\n\n//# sourceMappingURL=Immediate.js.map","/**\n * @module ol/style/IconImageCache\n */\nimport {asString} from '../color.js';\n\n/**\n * @classdesc\n * Singleton class. Available through {@link module:ol/style/IconImageCache~shared}.\n */\nvar IconImageCache = function IconImageCache() {\n\n  /**\n  * @type {!Object<string, import(\"./IconImage.js\").default>}\n  * @private\n  */\n  this.cache_ = {};\n\n  /**\n  * @type {number}\n  * @private\n  */\n  this.cacheSize_ = 0;\n\n  /**\n  * @type {number}\n  * @private\n  */\n  this.maxCacheSize_ = 32;\n};\n\n/**\n* FIXME empty description for jsdoc\n*/\nIconImageCache.prototype.clear = function clear () {\n  this.cache_ = {};\n  this.cacheSize_ = 0;\n};\n\n/**\n* FIXME empty description for jsdoc\n*/\nIconImageCache.prototype.expire = function expire () {\n  if (this.cacheSize_ > this.maxCacheSize_) {\n    var i = 0;\n    for (var key in this.cache_) {\n      var iconImage = this.cache_[key];\n      if ((i++ & 3) === 0 && !iconImage.hasListener()) {\n        delete this.cache_[key];\n        --this.cacheSize_;\n      }\n    }\n  }\n};\n\n/**\n* @param {string} src Src.\n* @param {?string} crossOrigin Cross origin.\n* @param {import(\"../color.js\").Color} color Color.\n* @return {import(\"./IconImage.js\").default} Icon image.\n*/\nIconImageCache.prototype.get = function get (src, crossOrigin, color) {\n  var key = getKey(src, crossOrigin, color);\n  return key in this.cache_ ? this.cache_[key] : null;\n};\n\n/**\n* @param {string} src Src.\n* @param {?string} crossOrigin Cross origin.\n* @param {import(\"../color.js\").Color} color Color.\n* @param {import(\"./IconImage.js\").default} iconImage Icon image.\n*/\nIconImageCache.prototype.set = function set (src, crossOrigin, color, iconImage) {\n  var key = getKey(src, crossOrigin, color);\n  this.cache_[key] = iconImage;\n  ++this.cacheSize_;\n};\n\n/**\n* Set the cache size of the icon cache. Default is `32`. Change this value when\n* your map uses more than 32 different icon images and you are not caching icon\n* styles on the application level.\n* @param {number} maxCacheSize Cache max size.\n* @api\n*/\nIconImageCache.prototype.setSize = function setSize (maxCacheSize) {\n  this.maxCacheSize_ = maxCacheSize;\n  this.expire();\n};\n\n\n/**\n * @param {string} src Src.\n * @param {?string} crossOrigin Cross origin.\n * @param {import(\"../color.js\").Color} color Color.\n * @return {string} Cache key.\n */\nfunction getKey(src, crossOrigin, color) {\n  var colorString = color ? asString(color) : 'null';\n  return crossOrigin + ':' + src + ':' + colorString;\n}\n\n\nexport default IconImageCache;\n\n\n/**\n * The {@link module:ol/style/IconImageCache~IconImageCache} for\n * {@link module:ol/style/Icon~Icon} images.\n * @api\n */\nexport var shared = new IconImageCache();\n\n//# sourceMappingURL=IconImageCache.js.map","/**\n * @module ol/renderer/Map\n */\nimport {abstract, getUid} from '../util.js';\nimport Disposable from '../Disposable.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {getWidth} from '../extent.js';\nimport {TRUE} from '../functions.js';\nimport {visibleAtResolution} from '../layer/Layer.js';\nimport {shared as iconImageCache} from '../style/IconImageCache.js';\nimport {compose as composeTransform, invert as invertTransform, setFromArray as transformSetFromArray} from '../transform.js';\n\n/**\n * @abstract\n */\nvar MapRenderer = /*@__PURE__*/(function (Disposable) {\n  function MapRenderer(map) {\n    Disposable.call(this);\n\n    /**\n     * @private\n     * @type {import(\"../PluggableMap.js\").default}\n     */\n    this.map_ = map;\n\n    /**\n     * @private\n     * @type {!Object<string, import(\"./Layer.js\").default>}\n     */\n    this.layerRenderers_ = {};\n\n    /**\n     * @private\n     * @type {Object<string, import(\"../events.js\").EventsKey>}\n     */\n    this.layerRendererListeners_ = {};\n\n    /**\n     * @private\n     * @type {Array<typeof import(\"./Layer.js\").default>}\n     */\n    this.layerRendererConstructors_ = [];\n\n  }\n\n  if ( Disposable ) MapRenderer.__proto__ = Disposable;\n  MapRenderer.prototype = Object.create( Disposable && Disposable.prototype );\n  MapRenderer.prototype.constructor = MapRenderer;\n\n  /**\n   * @abstract\n   * @param {import(\"../render/EventType.js\").default} type Event type.\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   */\n  MapRenderer.prototype.dispatchRenderEvent = function dispatchRenderEvent (type, frameState) {\n    abstract();\n  };\n\n  /**\n   * Register layer renderer constructors.\n   * @param {Array<typeof import(\"./Layer.js\").default>} constructors Layer renderers.\n   */\n  MapRenderer.prototype.registerLayerRenderers = function registerLayerRenderers (constructors) {\n    this.layerRendererConstructors_.push.apply(this.layerRendererConstructors_, constructors);\n  };\n\n  /**\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState FrameState.\n   * @protected\n   */\n  MapRenderer.prototype.calculateMatrices2D = function calculateMatrices2D (frameState) {\n    var viewState = frameState.viewState;\n    var coordinateToPixelTransform = frameState.coordinateToPixelTransform;\n    var pixelToCoordinateTransform = frameState.pixelToCoordinateTransform;\n\n    composeTransform(coordinateToPixelTransform,\n      frameState.size[0] / 2, frameState.size[1] / 2,\n      1 / viewState.resolution, -1 / viewState.resolution,\n      -viewState.rotation,\n      -viewState.center[0], -viewState.center[1]);\n\n    invertTransform(\n      transformSetFromArray(pixelToCoordinateTransform, coordinateToPixelTransform));\n  };\n\n  /**\n   * Removes all layer renderers.\n   */\n  MapRenderer.prototype.removeLayerRenderers = function removeLayerRenderers () {\n    for (var key in this.layerRenderers_) {\n      this.removeLayerRendererByKey_(key).dispose();\n    }\n  };\n\n  /**\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState FrameState.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {function(this: S, import(\"../Feature.js\").FeatureLike,\n   *     import(\"../layer/Layer.js\").default): T} callback Feature callback.\n   * @param {S} thisArg Value to use as `this` when executing `callback`.\n   * @param {function(this: U, import(\"../layer/Layer.js\").default): boolean} layerFilter Layer filter\n   *     function, only layers which are visible and for which this function\n   *     returns `true` will be tested for features.  By default, all visible\n   *     layers will be tested.\n   * @param {U} thisArg2 Value to use as `this` when executing `layerFilter`.\n   * @return {T|undefined} Callback result.\n   * @template S,T,U\n   */\n  MapRenderer.prototype.forEachFeatureAtCoordinate = function forEachFeatureAtCoordinate (\n    coordinate,\n    frameState,\n    hitTolerance,\n    callback,\n    thisArg,\n    layerFilter,\n    thisArg2\n  ) {\n    var result;\n    var viewState = frameState.viewState;\n    var viewResolution = viewState.resolution;\n\n    /**\n     * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n     * @param {import(\"../layer/Layer.js\").default} layer Layer.\n     * @return {?} Callback result.\n     */\n    function forEachFeatureAtCoordinate(feature, layer) {\n      var managed = frameState.layerStates[getUid(layer)].managed;\n      if (!(getUid(feature) in frameState.skippedFeatureUids && !managed)) {\n        return callback.call(thisArg, feature, managed ? layer : null);\n      }\n    }\n\n    var projection = viewState.projection;\n\n    var translatedCoordinate = coordinate;\n    if (projection.canWrapX()) {\n      var projectionExtent = projection.getExtent();\n      var worldWidth = getWidth(projectionExtent);\n      var x = coordinate[0];\n      if (x < projectionExtent[0] || x > projectionExtent[2]) {\n        var worldsAway = Math.ceil((projectionExtent[0] - x) / worldWidth);\n        translatedCoordinate = [x + worldWidth * worldsAway, coordinate[1]];\n      }\n    }\n\n    var layerStates = frameState.layerStatesArray;\n    var numLayers = layerStates.length;\n    var i;\n    for (i = numLayers - 1; i >= 0; --i) {\n      var layerState = layerStates[i];\n      var layer = layerState.layer;\n      if (visibleAtResolution(layerState, viewResolution) && layerFilter.call(thisArg2, layer)) {\n        var layerRenderer = this.getLayerRenderer(layer);\n        var source = /** @type {import(\"../layer/Layer.js\").default} */ (layer).getSource();\n        if (source) {\n          result = layerRenderer.forEachFeatureAtCoordinate(\n            source.getWrapX() ? translatedCoordinate : coordinate,\n            frameState, hitTolerance, forEachFeatureAtCoordinate);\n        }\n        if (result) {\n          return result;\n        }\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * @abstract\n   * @param {import(\"../pixel.js\").Pixel} pixel Pixel.\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState FrameState.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {function(this: S, import(\"../layer/Layer.js\").default, (Uint8ClampedArray|Uint8Array)): T} callback Layer\n   *     callback.\n   * @param {S} thisArg Value to use as `this` when executing `callback`.\n   * @param {function(this: U, import(\"../layer/Layer.js\").default): boolean} layerFilter Layer filter\n   *     function, only layers which are visible and for which this function\n   *     returns `true` will be tested for features.  By default, all visible\n   *     layers will be tested.\n   * @param {U} thisArg2 Value to use as `this` when executing `layerFilter`.\n   * @return {T|undefined} Callback result.\n   * @template S,T,U\n   */\n  MapRenderer.prototype.forEachLayerAtPixel = function forEachLayerAtPixel (pixel, frameState, hitTolerance, callback, thisArg, layerFilter, thisArg2) {\n    return abstract();\n  };\n\n  /**\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState FrameState.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {function(this: U, import(\"../layer/Layer.js\").default): boolean} layerFilter Layer filter\n   *     function, only layers which are visible and for which this function\n   *     returns `true` will be tested for features.  By default, all visible\n   *     layers will be tested.\n   * @param {U} thisArg Value to use as `this` when executing `layerFilter`.\n   * @return {boolean} Is there a feature at the given coordinate?\n   * @template U\n   */\n  MapRenderer.prototype.hasFeatureAtCoordinate = function hasFeatureAtCoordinate (coordinate, frameState, hitTolerance, layerFilter, thisArg) {\n    var hasFeature = this.forEachFeatureAtCoordinate(\n      coordinate, frameState, hitTolerance, TRUE, this, layerFilter, thisArg);\n\n    return hasFeature !== undefined;\n  };\n\n  /**\n   * @param {import(\"../layer/Base.js\").default} layer Layer.\n   * @protected\n   * @return {import(\"./Layer.js\").default} Layer renderer.\n   */\n  MapRenderer.prototype.getLayerRenderer = function getLayerRenderer (layer) {\n    var layerKey = getUid(layer);\n    if (layerKey in this.layerRenderers_) {\n      return this.layerRenderers_[layerKey];\n    } else {\n      var renderer;\n      for (var i = 0, ii = this.layerRendererConstructors_.length; i < ii; ++i) {\n        var candidate = this.layerRendererConstructors_[i];\n        if (candidate['handles'](layer)) {\n          renderer = candidate['create'](this, layer);\n          break;\n        }\n      }\n      if (renderer) {\n        this.layerRenderers_[layerKey] = renderer;\n        this.layerRendererListeners_[layerKey] = listen(renderer,\n          EventType.CHANGE, this.handleLayerRendererChange_, this);\n      } else {\n        throw new Error('Unable to create renderer for layer: ' + layer.getType());\n      }\n      return renderer;\n    }\n  };\n\n  /**\n   * @param {string} layerKey Layer key.\n   * @protected\n   * @return {import(\"./Layer.js\").default} Layer renderer.\n   */\n  MapRenderer.prototype.getLayerRendererByKey = function getLayerRendererByKey (layerKey) {\n    return this.layerRenderers_[layerKey];\n  };\n\n  /**\n   * @protected\n   * @return {Object<string, import(\"./Layer.js\").default>} Layer renderers.\n   */\n  MapRenderer.prototype.getLayerRenderers = function getLayerRenderers () {\n    return this.layerRenderers_;\n  };\n\n  /**\n   * @return {import(\"../PluggableMap.js\").default} Map.\n   */\n  MapRenderer.prototype.getMap = function getMap () {\n    return this.map_;\n  };\n\n  /**\n   * Handle changes in a layer renderer.\n   * @private\n   */\n  MapRenderer.prototype.handleLayerRendererChange_ = function handleLayerRendererChange_ () {\n    this.map_.render();\n  };\n\n  /**\n   * @param {string} layerKey Layer key.\n   * @return {import(\"./Layer.js\").default} Layer renderer.\n   * @private\n   */\n  MapRenderer.prototype.removeLayerRendererByKey_ = function removeLayerRendererByKey_ (layerKey) {\n    var layerRenderer = this.layerRenderers_[layerKey];\n    delete this.layerRenderers_[layerKey];\n\n    unlistenByKey(this.layerRendererListeners_[layerKey]);\n    delete this.layerRendererListeners_[layerKey];\n\n    return layerRenderer;\n  };\n\n  /**\n   * @param {import(\"../PluggableMap.js\").default} map Map.\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   * @private\n   */\n  MapRenderer.prototype.removeUnusedLayerRenderers_ = function removeUnusedLayerRenderers_ (map, frameState) {\n    for (var layerKey in this.layerRenderers_) {\n      if (!frameState || !(layerKey in frameState.layerStates)) {\n        this.removeLayerRendererByKey_(layerKey).dispose();\n      }\n    }\n  };\n\n  /**\n   * Render.\n   * @abstract\n   * @param {?import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   */\n  MapRenderer.prototype.renderFrame = function renderFrame (frameState) {\n    abstract();\n  };\n\n  /**\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   * @protected\n   */\n  MapRenderer.prototype.scheduleExpireIconCache = function scheduleExpireIconCache (frameState) {\n    frameState.postRenderFunctions.push(/** @type {import(\"../PluggableMap.js\").PostRenderFunction} */ (expireIconCache));\n  };\n\n  /**\n   * @param {!import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   * @protected\n   */\n  MapRenderer.prototype.scheduleRemoveUnusedLayerRenderers = function scheduleRemoveUnusedLayerRenderers (frameState) {\n    for (var layerKey in this.layerRenderers_) {\n      if (!(layerKey in frameState.layerStates)) {\n        frameState.postRenderFunctions.push(\n          /** @type {import(\"../PluggableMap.js\").PostRenderFunction} */ (this.removeUnusedLayerRenderers_.bind(this))\n        );\n        return;\n      }\n    }\n  };\n\n  return MapRenderer;\n}(Disposable));\n\n\n/**\n * @param {import(\"../PluggableMap.js\").default} map Map.\n * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n */\nfunction expireIconCache(map, frameState) {\n  iconImageCache.expire();\n}\n\n\n/**\n * @param {import(\"../layer/Layer.js\").State} state1 First layer state.\n * @param {import(\"../layer/Layer.js\").State} state2 Second layer state.\n * @return {number} The zIndex difference.\n */\nexport function sortByZIndex(state1, state2) {\n  return state1.zIndex - state2.zIndex;\n}\nexport default MapRenderer;\n\n//# sourceMappingURL=Map.js.map","/**\n * @module ol/renderer/canvas/Map\n */\nimport {create as createTransform, apply as applyTransform, compose as composeTransform} from '../../transform.js';\nimport {includes, stableSort} from '../../array.js';\nimport {CLASS_UNSELECTABLE} from '../../css.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {visibleAtResolution} from '../../layer/Layer.js';\nimport RenderEvent from '../../render/Event.js';\nimport RenderEventType from '../../render/EventType.js';\nimport {rotateAtOffset} from '../../render/canvas.js';\nimport CanvasImmediateRenderer from '../../render/canvas/Immediate.js';\nimport MapRenderer, {sortByZIndex} from '../Map.js';\nimport SourceState from '../../source/State.js';\n\n\n/**\n * @type {Array<typeof import(\"../Layer.js\").default>}\n */\nexport var layerRendererConstructors = [];\n\n/**\n * @classdesc\n * Canvas map renderer.\n * @api\n */\nvar CanvasMapRenderer = /*@__PURE__*/(function (MapRenderer) {\n  function CanvasMapRenderer(map) {\n    MapRenderer.call(this, map);\n\n    var container = map.getViewport();\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.context_ = createCanvasContext2D();\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.canvas_ = this.context_.canvas;\n\n    this.canvas_.style.width = '100%';\n    this.canvas_.style.height = '100%';\n    this.canvas_.style.display = 'block';\n    this.canvas_.className = CLASS_UNSELECTABLE;\n    container.insertBefore(this.canvas_, container.childNodes[0] || null);\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.renderedVisible_ = true;\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.transform_ = createTransform();\n\n  }\n\n  if ( MapRenderer ) CanvasMapRenderer.__proto__ = MapRenderer;\n  CanvasMapRenderer.prototype = Object.create( MapRenderer && MapRenderer.prototype );\n  CanvasMapRenderer.prototype.constructor = CanvasMapRenderer;\n\n  /**\n   * @param {import(\"../../render/EventType.js\").default} type Event type.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   */\n  CanvasMapRenderer.prototype.dispatchRenderEvent = function dispatchRenderEvent (type, frameState) {\n    var map = this.getMap();\n    var context = this.context_;\n    if (map.hasListener(type)) {\n      var extent = frameState.extent;\n      var pixelRatio = frameState.pixelRatio;\n      var viewState = frameState.viewState;\n      var rotation = viewState.rotation;\n\n      var transform = this.getTransform(frameState);\n\n      var vectorContext = new CanvasImmediateRenderer(context, pixelRatio,\n        extent, transform, rotation);\n      var composeEvent = new RenderEvent(type, vectorContext,\n        frameState, context, null);\n      map.dispatchEvent(composeEvent);\n    }\n  };\n\n  /**\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @protected\n   * @return {!import(\"../../transform.js\").Transform} Transform.\n   */\n  CanvasMapRenderer.prototype.getTransform = function getTransform (frameState) {\n    var viewState = frameState.viewState;\n    var dx1 = this.canvas_.width / 2;\n    var dy1 = this.canvas_.height / 2;\n    var sx = frameState.pixelRatio / viewState.resolution;\n    var sy = -sx;\n    var angle = -viewState.rotation;\n    var dx2 = -viewState.center[0];\n    var dy2 = -viewState.center[1];\n    return composeTransform(this.transform_, dx1, dy1, sx, sy, angle, dx2, dy2);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasMapRenderer.prototype.renderFrame = function renderFrame (frameState) {\n\n    if (!frameState) {\n      if (this.renderedVisible_) {\n        this.canvas_.style.display = 'none';\n        this.renderedVisible_ = false;\n      }\n      return;\n    }\n\n    var context = this.context_;\n    var pixelRatio = frameState.pixelRatio;\n    var width = Math.round(frameState.size[0] * pixelRatio);\n    var height = Math.round(frameState.size[1] * pixelRatio);\n    if (this.canvas_.width != width || this.canvas_.height != height) {\n      this.canvas_.width = width;\n      this.canvas_.height = height;\n    } else {\n      context.clearRect(0, 0, width, height);\n    }\n\n    var rotation = frameState.viewState.rotation;\n\n    this.calculateMatrices2D(frameState);\n\n    this.dispatchRenderEvent(RenderEventType.PRECOMPOSE, frameState);\n\n    var layerStatesArray = frameState.layerStatesArray;\n    stableSort(layerStatesArray, sortByZIndex);\n\n    if (rotation) {\n      context.save();\n      rotateAtOffset(context, rotation, width / 2, height / 2);\n    }\n\n    var viewResolution = frameState.viewState.resolution;\n    var i, ii;\n    for (i = 0, ii = layerStatesArray.length; i < ii; ++i) {\n      var layerState = layerStatesArray[i];\n      var layer = layerState.layer;\n      var layerRenderer = /** @type {import(\"./Layer.js\").default} */ (this.getLayerRenderer(layer));\n      if (!visibleAtResolution(layerState, viewResolution) ||\n          layerState.sourceState != SourceState.READY) {\n        continue;\n      }\n      if (layerRenderer.prepareFrame(frameState, layerState)) {\n        layerRenderer.composeFrame(frameState, layerState, context);\n      }\n    }\n\n    if (rotation) {\n      context.restore();\n    }\n\n    this.dispatchRenderEvent(RenderEventType.POSTCOMPOSE, frameState);\n\n    if (!this.renderedVisible_) {\n      this.canvas_.style.display = '';\n      this.renderedVisible_ = true;\n    }\n\n    this.scheduleRemoveUnusedLayerRenderers(frameState);\n    this.scheduleExpireIconCache(frameState);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasMapRenderer.prototype.forEachLayerAtPixel = function forEachLayerAtPixel (pixel, frameState, hitTolerance, callback, thisArg, layerFilter, thisArg2) {\n    var result;\n    var viewState = frameState.viewState;\n    var viewResolution = viewState.resolution;\n\n    var layerStates = frameState.layerStatesArray;\n    var numLayers = layerStates.length;\n\n    var coordinate = applyTransform(\n      frameState.pixelToCoordinateTransform, pixel.slice());\n\n    var i;\n    for (i = numLayers - 1; i >= 0; --i) {\n      var layerState = layerStates[i];\n      var layer = layerState.layer;\n      if (visibleAtResolution(layerState, viewResolution) && layerFilter.call(thisArg2, layer)) {\n        var layerRenderer = /** @type {import(\"./Layer.js\").default} */ (this.getLayerRenderer(layer));\n        result = layerRenderer.forEachLayerAtCoordinate(\n          coordinate, frameState, hitTolerance, callback, thisArg);\n        if (result) {\n          return result;\n        }\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasMapRenderer.prototype.registerLayerRenderers = function registerLayerRenderers (constructors) {\n    MapRenderer.prototype.registerLayerRenderers.call(this, constructors);\n    for (var i = 0, ii = constructors.length; i < ii; ++i) {\n      var ctor = constructors[i];\n      if (!includes(layerRendererConstructors, ctor)) {\n        layerRendererConstructors.push(ctor);\n      }\n    }\n  };\n\n  return CanvasMapRenderer;\n}(MapRenderer));\n\n\nexport default CanvasMapRenderer;\n\n//# sourceMappingURL=Map.js.map","/**\n * @module ol/renderer/Layer\n */\nimport {getUid} from '../util.js';\nimport ImageState from '../ImageState.js';\nimport Observable from '../Observable.js';\nimport TileState from '../TileState.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport SourceState from '../source/State.js';\n\nvar LayerRenderer = /*@__PURE__*/(function (Observable) {\n  function LayerRenderer(layer) {\n\n    Observable.call(this);\n\n    /**\n     * @private\n     * @type {import(\"../layer/Layer.js\").default}\n     */\n    this.layer_ = layer;\n\n  }\n\n  if ( Observable ) LayerRenderer.__proto__ = Observable;\n  LayerRenderer.prototype = Object.create( Observable && Observable.prototype );\n  LayerRenderer.prototype.constructor = LayerRenderer;\n\n  /**\n   * Create a function that adds loaded tiles to the tile lookup.\n   * @param {import(\"../source/Tile.js\").default} source Tile source.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection of the tiles.\n   * @param {Object<number, Object<string, import(\"../Tile.js\").default>>} tiles Lookup of loaded tiles by zoom level.\n   * @return {function(number, import(\"../TileRange.js\").default):boolean} A function that can be\n   *     called with a zoom level and a tile range to add loaded tiles to the lookup.\n   * @protected\n   */\n  LayerRenderer.prototype.createLoadedTileFinder = function createLoadedTileFinder (source, projection, tiles) {\n    return (\n      /**\n       * @param {number} zoom Zoom level.\n       * @param {import(\"../TileRange.js\").default} tileRange Tile range.\n       * @return {boolean} The tile range is fully loaded.\n       */\n      function(zoom, tileRange) {\n        /**\n         * @param {import(\"../Tile.js\").default} tile Tile.\n         */\n        function callback(tile) {\n          if (!tiles[zoom]) {\n            tiles[zoom] = {};\n          }\n          tiles[zoom][tile.tileCoord.toString()] = tile;\n        }\n        return source.forEachLoadedTile(projection, zoom, tileRange, callback);\n      }\n    );\n  };\n\n  /**\n   * @abstract\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {function(import(\"../Feature.js\").FeatureLike, import(\"../layer/Layer.js\").default): T} callback Feature callback.\n   * @return {T|void} Callback result.\n   * @template T\n   */\n  LayerRenderer.prototype.forEachFeatureAtCoordinate = function forEachFeatureAtCoordinate (coordinate, frameState, hitTolerance, callback) {};\n\n  /**\n   * @return {import(\"../layer/Layer.js\").default} Layer.\n   */\n  LayerRenderer.prototype.getLayer = function getLayer () {\n    return this.layer_;\n  };\n\n  /**\n   * Handle changes in image state.\n   * @param {import(\"../events/Event.js\").default} event Image change event.\n   * @private\n   */\n  LayerRenderer.prototype.handleImageChange_ = function handleImageChange_ (event) {\n    var image = /** @type {import(\"../Image.js\").default} */ (event.target);\n    if (image.getState() === ImageState.LOADED) {\n      this.renderIfReadyAndVisible();\n    }\n  };\n\n  /**\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   * @return {boolean} Is there a feature at the given coordinate?\n   */\n  LayerRenderer.prototype.hasFeatureAtCoordinate = function hasFeatureAtCoordinate (coordinate, frameState) {\n    return false;\n  };\n\n  /**\n   * Load the image if not already loaded, and register the image change\n   * listener if needed.\n   * @param {import(\"../ImageBase.js\").default} image Image.\n   * @return {boolean} `true` if the image is already loaded, `false` otherwise.\n   * @protected\n   */\n  LayerRenderer.prototype.loadImage = function loadImage (image) {\n    var imageState = image.getState();\n    if (imageState != ImageState.LOADED && imageState != ImageState.ERROR) {\n      listen(image, EventType.CHANGE, this.handleImageChange_, this);\n    }\n    if (imageState == ImageState.IDLE) {\n      image.load();\n      imageState = image.getState();\n    }\n    return imageState == ImageState.LOADED;\n  };\n\n  /**\n   * @protected\n   */\n  LayerRenderer.prototype.renderIfReadyAndVisible = function renderIfReadyAndVisible () {\n    var layer = this.getLayer();\n    if (layer.getVisible() && layer.getSourceState() == SourceState.READY) {\n      this.changed();\n    }\n  };\n\n  /**\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../source/Tile.js\").default} tileSource Tile source.\n   * @protected\n   */\n  LayerRenderer.prototype.scheduleExpireCache = function scheduleExpireCache (frameState, tileSource) {\n    if (tileSource.canExpireCache()) {\n      /**\n       * @param {import(\"../source/Tile.js\").default} tileSource Tile source.\n       * @param {import(\"../PluggableMap.js\").default} map Map.\n       * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n       */\n      var postRenderFunction = function(tileSource, map, frameState) {\n        var tileSourceKey = getUid(tileSource);\n        if (tileSourceKey in frameState.usedTiles) {\n          tileSource.expireCache(frameState.viewState.projection,\n            frameState.usedTiles[tileSourceKey]);\n        }\n      }.bind(null, tileSource);\n\n      frameState.postRenderFunctions.push(\n        /** @type {import(\"../PluggableMap.js\").PostRenderFunction} */ (postRenderFunction)\n      );\n    }\n  };\n\n  /**\n   * @param {!Object<string, !Object<string, import(\"../TileRange.js\").default>>} usedTiles Used tiles.\n   * @param {import(\"../source/Tile.js\").default} tileSource Tile source.\n   * @param {number} z Z.\n   * @param {import(\"../TileRange.js\").default} tileRange Tile range.\n   * @protected\n   */\n  LayerRenderer.prototype.updateUsedTiles = function updateUsedTiles (usedTiles, tileSource, z, tileRange) {\n    // FIXME should we use tilesToDrawByZ instead?\n    var tileSourceKey = getUid(tileSource);\n    var zKey = z.toString();\n    if (tileSourceKey in usedTiles) {\n      if (zKey in usedTiles[tileSourceKey]) {\n        usedTiles[tileSourceKey][zKey].extend(tileRange);\n      } else {\n        usedTiles[tileSourceKey][zKey] = tileRange;\n      }\n    } else {\n      usedTiles[tileSourceKey] = {};\n      usedTiles[tileSourceKey][zKey] = tileRange;\n    }\n  };\n\n  /**\n   * Manage tile pyramid.\n   * This function performs a number of functions related to the tiles at the\n   * current zoom and lower zoom levels:\n   * - registers idle tiles in frameState.wantedTiles so that they are not\n   *   discarded by the tile queue\n   * - enqueues missing tiles\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../source/Tile.js\").default} tileSource Tile source.\n   * @param {import(\"../tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} currentZ Current Z.\n   * @param {number} preload Load low resolution tiles up to 'preload' levels.\n   * @param {function(this: T, import(\"../Tile.js\").default)=} opt_tileCallback Tile callback.\n   * @param {T=} opt_this Object to use as `this` in `opt_tileCallback`.\n   * @protected\n   * @template T\n   */\n  LayerRenderer.prototype.manageTilePyramid = function manageTilePyramid (\n    frameState,\n    tileSource,\n    tileGrid,\n    pixelRatio,\n    projection,\n    extent,\n    currentZ,\n    preload,\n    opt_tileCallback,\n    opt_this\n  ) {\n    var tileSourceKey = getUid(tileSource);\n    if (!(tileSourceKey in frameState.wantedTiles)) {\n      frameState.wantedTiles[tileSourceKey] = {};\n    }\n    var wantedTiles = frameState.wantedTiles[tileSourceKey];\n    var tileQueue = frameState.tileQueue;\n    var minZoom = tileGrid.getMinZoom();\n    var tile, tileRange, tileResolution, x, y, z;\n    for (z = minZoom; z <= currentZ; ++z) {\n      tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z, tileRange);\n      tileResolution = tileGrid.getResolution(z);\n      for (x = tileRange.minX; x <= tileRange.maxX; ++x) {\n        for (y = tileRange.minY; y <= tileRange.maxY; ++y) {\n          if (currentZ - z <= preload) {\n            tile = tileSource.getTile(z, x, y, pixelRatio, projection);\n            if (tile.getState() == TileState.IDLE) {\n              wantedTiles[tile.getKey()] = true;\n              if (!tileQueue.isKeyQueued(tile.getKey())) {\n                tileQueue.enqueue([tile, tileSourceKey,\n                  tileGrid.getTileCoordCenter(tile.tileCoord), tileResolution]);\n              }\n            }\n            if (opt_tileCallback !== undefined) {\n              opt_tileCallback.call(opt_this, tile);\n            }\n          } else {\n            tileSource.useTile(z, x, y, projection);\n          }\n        }\n      }\n    }\n  };\n\n  return LayerRenderer;\n}(Observable));\n\nexport default LayerRenderer;\n\n//# sourceMappingURL=Layer.js.map","/**\n * @module ol/renderer/canvas/Layer\n */\nimport {abstract} from '../../util.js';\nimport {getBottomLeft, getBottomRight, getTopLeft, getTopRight} from '../../extent.js';\nimport {TRUE} from '../../functions.js';\nimport RenderEvent from '../../render/Event.js';\nimport RenderEventType from '../../render/EventType.js';\nimport {rotateAtOffset} from '../../render/canvas.js';\nimport CanvasImmediateRenderer from '../../render/canvas/Immediate.js';\nimport LayerRenderer from '../Layer.js';\nimport {create as createTransform, apply as applyTransform, compose as composeTransform} from '../../transform.js';\n\n/**\n * @abstract\n */\nvar CanvasLayerRenderer = /*@__PURE__*/(function (LayerRenderer) {\n  function CanvasLayerRenderer(layer) {\n\n    LayerRenderer.call(this, layer);\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.renderedResolution;\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.transform_ = createTransform();\n\n  }\n\n  if ( LayerRenderer ) CanvasLayerRenderer.__proto__ = LayerRenderer;\n  CanvasLayerRenderer.prototype = Object.create( LayerRenderer && LayerRenderer.prototype );\n  CanvasLayerRenderer.prototype.constructor = CanvasLayerRenderer;\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../extent.js\").Extent} extent Clip extent.\n   * @protected\n   */\n  CanvasLayerRenderer.prototype.clip = function clip (context, frameState, extent) {\n    var pixelRatio = frameState.pixelRatio;\n    var width = frameState.size[0] * pixelRatio;\n    var height = frameState.size[1] * pixelRatio;\n    var rotation = frameState.viewState.rotation;\n    var topLeft = getTopLeft(extent);\n    var topRight = getTopRight(extent);\n    var bottomRight = getBottomRight(extent);\n    var bottomLeft = getBottomLeft(extent);\n\n    applyTransform(frameState.coordinateToPixelTransform, topLeft);\n    applyTransform(frameState.coordinateToPixelTransform, topRight);\n    applyTransform(frameState.coordinateToPixelTransform, bottomRight);\n    applyTransform(frameState.coordinateToPixelTransform, bottomLeft);\n\n    context.save();\n    rotateAtOffset(context, -rotation, width / 2, height / 2);\n    context.beginPath();\n    context.moveTo(topLeft[0] * pixelRatio, topLeft[1] * pixelRatio);\n    context.lineTo(topRight[0] * pixelRatio, topRight[1] * pixelRatio);\n    context.lineTo(bottomRight[0] * pixelRatio, bottomRight[1] * pixelRatio);\n    context.lineTo(bottomLeft[0] * pixelRatio, bottomLeft[1] * pixelRatio);\n    context.clip();\n    rotateAtOffset(context, rotation, width / 2, height / 2);\n  };\n\n  /**\n   * @param {import(\"../../render/EventType.js\").default} type Event type.\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../transform.js\").Transform=} opt_transform Transform.\n   * @private\n   */\n  CanvasLayerRenderer.prototype.dispatchComposeEvent_ = function dispatchComposeEvent_ (type, context, frameState, opt_transform) {\n    var layer = this.getLayer();\n    if (layer.hasListener(type)) {\n      var width = frameState.size[0] * frameState.pixelRatio;\n      var height = frameState.size[1] * frameState.pixelRatio;\n      var rotation = frameState.viewState.rotation;\n      rotateAtOffset(context, -rotation, width / 2, height / 2);\n      var transform = opt_transform !== undefined ?\n        opt_transform : this.getTransform(frameState, 0);\n      var render = new CanvasImmediateRenderer(\n        context, frameState.pixelRatio, frameState.extent, transform,\n        frameState.viewState.rotation);\n      var composeEvent = new RenderEvent(type, render, frameState,\n        context, null);\n      layer.dispatchEvent(composeEvent);\n      rotateAtOffset(context, rotation, width / 2, height / 2);\n    }\n  };\n\n  /**\n   * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState FrameState.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {function(this: S, import(\"../../layer/Layer.js\").default, (Uint8ClampedArray|Uint8Array)): T} callback Layer\n   *     callback.\n   * @param {S} thisArg Value to use as `this` when executing `callback`.\n   * @return {T|undefined} Callback result.\n   * @template S,T,U\n   */\n  CanvasLayerRenderer.prototype.forEachLayerAtCoordinate = function forEachLayerAtCoordinate (coordinate, frameState, hitTolerance, callback, thisArg) {\n    var hasFeature = this.forEachFeatureAtCoordinate(coordinate, frameState, hitTolerance, TRUE);\n\n    if (hasFeature) {\n      return callback.call(thisArg, this.getLayer(), null);\n    } else {\n      return undefined;\n    }\n  };\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../layer/Layer.js\").State} layerState Layer state.\n   * @param {import(\"../../transform.js\").Transform=} opt_transform Transform.\n   * @protected\n   */\n  CanvasLayerRenderer.prototype.postCompose = function postCompose (context, frameState, layerState, opt_transform) {\n    this.dispatchComposeEvent_(RenderEventType.POSTCOMPOSE, context, frameState, opt_transform);\n  };\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../transform.js\").Transform=} opt_transform Transform.\n   * @protected\n   */\n  CanvasLayerRenderer.prototype.preCompose = function preCompose (context, frameState, opt_transform) {\n    this.dispatchComposeEvent_(RenderEventType.PRECOMPOSE, context, frameState, opt_transform);\n  };\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../transform.js\").Transform=} opt_transform Transform.\n   * @protected\n   */\n  CanvasLayerRenderer.prototype.dispatchRenderEvent = function dispatchRenderEvent (context, frameState, opt_transform) {\n    this.dispatchComposeEvent_(RenderEventType.RENDER, context, frameState, opt_transform);\n  };\n\n  /**\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {number} offsetX Offset on the x-axis in view coordinates.\n   * @protected\n   * @return {!import(\"../../transform.js\").Transform} Transform.\n   */\n  CanvasLayerRenderer.prototype.getTransform = function getTransform (frameState, offsetX) {\n    var viewState = frameState.viewState;\n    var pixelRatio = frameState.pixelRatio;\n    var dx1 = pixelRatio * frameState.size[0] / 2;\n    var dy1 = pixelRatio * frameState.size[1] / 2;\n    var sx = pixelRatio / viewState.resolution;\n    var sy = -sx;\n    var angle = -viewState.rotation;\n    var dx2 = -viewState.center[0] + offsetX;\n    var dy2 = -viewState.center[1];\n    return composeTransform(this.transform_, dx1, dy1, sx, sy, angle, dx2, dy2);\n  };\n\n  /**\n   * @abstract\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../layer/Layer.js\").State} layerState Layer state.\n   * @param {CanvasRenderingContext2D} context Context.\n   */\n  CanvasLayerRenderer.prototype.composeFrame = function composeFrame (frameState, layerState, context) {\n    abstract();\n  };\n\n  /**\n   * @abstract\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../layer/Layer.js\").State} layerState Layer state.\n   * @return {boolean} whether composeFrame should be called.\n   */\n  CanvasLayerRenderer.prototype.prepareFrame = function prepareFrame (frameState, layerState) {\n    return abstract();\n  };\n\n  return CanvasLayerRenderer;\n}(LayerRenderer));\n\nexport default CanvasLayerRenderer;\n\n//# sourceMappingURL=Layer.js.map","/**\n * @module ol/renderer/canvas/IntermediateCanvas\n */\nimport {abstract} from '../../util.js';\nimport {scale as scaleCoordinate} from '../../coordinate.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {containsExtent, intersects} from '../../extent.js';\nimport CanvasLayerRenderer from './Layer.js';\nimport {create as createTransform, apply as applyTransform} from '../../transform.js';\n\n/**\n * @abstract\n */\nvar IntermediateCanvasRenderer = /*@__PURE__*/(function (CanvasLayerRenderer) {\n  function IntermediateCanvasRenderer(layer) {\n\n    CanvasLayerRenderer.call(this, layer);\n\n    /**\n     * @protected\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.coordinateToCanvasPixelTransform = createTransform();\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.hitCanvasContext_ = null;\n\n  }\n\n  if ( CanvasLayerRenderer ) IntermediateCanvasRenderer.__proto__ = CanvasLayerRenderer;\n  IntermediateCanvasRenderer.prototype = Object.create( CanvasLayerRenderer && CanvasLayerRenderer.prototype );\n  IntermediateCanvasRenderer.prototype.constructor = IntermediateCanvasRenderer;\n\n  /**\n   * @inheritDoc\n   */\n  IntermediateCanvasRenderer.prototype.composeFrame = function composeFrame (frameState, layerState, context) {\n\n    this.preCompose(context, frameState);\n\n    var image = this.getImage();\n    if (image) {\n\n      // clipped rendering if layer extent is set\n      var extent = layerState.extent;\n      var clipped = extent !== undefined &&\n          !containsExtent(extent, frameState.extent) &&\n          intersects(extent, frameState.extent);\n      if (clipped) {\n        this.clip(context, frameState, /** @type {import(\"../../extent.js\").Extent} */ (extent));\n      }\n\n      var imageTransform = this.getImageTransform();\n      // for performance reasons, context.save / context.restore is not used\n      // to save and restore the transformation matrix and the opacity.\n      // see http://jsperf.com/context-save-restore-versus-variable\n      var alpha = context.globalAlpha;\n      context.globalAlpha = layerState.opacity;\n\n      // for performance reasons, context.setTransform is only used\n      // when the view is rotated. see http://jsperf.com/canvas-transform\n      var dx = imageTransform[4];\n      var dy = imageTransform[5];\n      var dw = image.width * imageTransform[0];\n      var dh = image.height * imageTransform[3];\n      if (dw >= 0.5 && dh >= 0.5) {\n        context.drawImage(image, 0, 0, +image.width, +image.height,\n          Math.round(dx), Math.round(dy), Math.round(dw), Math.round(dh));\n      }\n      context.globalAlpha = alpha;\n\n      if (clipped) {\n        context.restore();\n      }\n    }\n\n    this.postCompose(context, frameState, layerState);\n  };\n\n  /**\n   * @abstract\n   * @return {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement} Canvas.\n   */\n  IntermediateCanvasRenderer.prototype.getImage = function getImage () {\n    return abstract();\n  };\n\n  /**\n   * @abstract\n   * @return {!import(\"../../transform.js\").Transform} Image transform.\n   */\n  IntermediateCanvasRenderer.prototype.getImageTransform = function getImageTransform () {\n    return abstract();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  IntermediateCanvasRenderer.prototype.forEachLayerAtCoordinate = function forEachLayerAtCoordinate (coordinate, frameState, hitTolerance, callback, thisArg) {\n    if (!this.getImage()) {\n      return undefined;\n    }\n\n    var pixel = applyTransform(this.coordinateToCanvasPixelTransform, coordinate.slice());\n    scaleCoordinate(pixel, frameState.viewState.resolution / this.renderedResolution);\n\n    if (!this.hitCanvasContext_) {\n      this.hitCanvasContext_ = createCanvasContext2D(1, 1);\n    }\n\n    this.hitCanvasContext_.clearRect(0, 0, 1, 1);\n    this.hitCanvasContext_.drawImage(this.getImage(), pixel[0], pixel[1], 1, 1, 0, 0, 1, 1);\n\n    var imageData = this.hitCanvasContext_.getImageData(0, 0, 1, 1).data;\n    if (imageData[3] > 0) {\n      return callback.call(thisArg, this.getLayer(), imageData);\n    } else {\n      return undefined;\n    }\n  };\n\n  return IntermediateCanvasRenderer;\n}(CanvasLayerRenderer));\n\n\nexport default IntermediateCanvasRenderer;\n\n//# sourceMappingURL=IntermediateCanvas.js.map","/**\n * @module ol/renderer/canvas/ImageLayer\n */\nimport {ENABLE_RASTER_REPROJECTION} from '../../reproj/common.js';\nimport ImageCanvas from '../../ImageCanvas.js';\nimport LayerType from '../../LayerType.js';\nimport ViewHint from '../../ViewHint.js';\nimport {equals} from '../../array.js';\nimport {getHeight, getIntersection, getWidth, isEmpty} from '../../extent.js';\nimport VectorRenderType from '../../layer/VectorRenderType.js';\nimport {assign} from '../../obj.js';\nimport {layerRendererConstructors} from './Map.js';\nimport IntermediateCanvasRenderer from './IntermediateCanvas.js';\nimport {create as createTransform, compose as composeTransform} from '../../transform.js';\n\n/**\n * @classdesc\n * Canvas renderer for image layers.\n * @api\n */\nvar CanvasImageLayerRenderer = /*@__PURE__*/(function (IntermediateCanvasRenderer) {\n  function CanvasImageLayerRenderer(imageLayer) {\n\n    IntermediateCanvasRenderer.call(this, imageLayer);\n\n    /**\n     * @private\n     * @type {?import(\"../../ImageBase.js\").default}\n     */\n    this.image_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.imageTransform_ = createTransform();\n\n    /**\n     * @type {!Array<string>}\n     */\n    this.skippedFeatures_ = [];\n\n    /**\n     * @private\n     * @type {import(\"./VectorLayer.js\").default}\n     */\n    this.vectorRenderer_ = null;\n\n    if (imageLayer.getType() === LayerType.VECTOR) {\n      for (var i = 0, ii = layerRendererConstructors.length; i < ii; ++i) {\n        var ctor = layerRendererConstructors[i];\n        if (ctor !== CanvasImageLayerRenderer && ctor['handles'](imageLayer)) {\n          this.vectorRenderer_ = /** @type {import(\"./VectorLayer.js\").default} */ (new ctor(imageLayer));\n          break;\n        }\n      }\n    }\n\n  }\n\n  if ( IntermediateCanvasRenderer ) CanvasImageLayerRenderer.__proto__ = IntermediateCanvasRenderer;\n  CanvasImageLayerRenderer.prototype = Object.create( IntermediateCanvasRenderer && IntermediateCanvasRenderer.prototype );\n  CanvasImageLayerRenderer.prototype.constructor = CanvasImageLayerRenderer;\n\n  /**\n   * @inheritDoc\n   */\n  CanvasImageLayerRenderer.prototype.disposeInternal = function disposeInternal () {\n    if (this.vectorRenderer_) {\n      this.vectorRenderer_.dispose();\n    }\n    IntermediateCanvasRenderer.prototype.disposeInternal.call(this);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasImageLayerRenderer.prototype.getImage = function getImage () {\n    return !this.image_ ? null : this.image_.getImage();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasImageLayerRenderer.prototype.getImageTransform = function getImageTransform () {\n    return this.imageTransform_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasImageLayerRenderer.prototype.prepareFrame = function prepareFrame (frameState, layerState) {\n\n    var pixelRatio = frameState.pixelRatio;\n    var size = frameState.size;\n    var viewState = frameState.viewState;\n    var viewCenter = viewState.center;\n    var viewResolution = viewState.resolution;\n\n    var image;\n    var imageLayer = /** @type {import(\"../../layer/Image.js\").default} */ (this.getLayer());\n    var imageSource = /** @type {import(\"../../source/Image.js\").default} */ (imageLayer.getSource());\n\n    var hints = frameState.viewHints;\n\n    var vectorRenderer = this.vectorRenderer_;\n    var renderedExtent = frameState.extent;\n    if (!vectorRenderer && layerState.extent !== undefined) {\n      renderedExtent = getIntersection(renderedExtent, layerState.extent);\n    }\n\n    if (!hints[ViewHint.ANIMATING] && !hints[ViewHint.INTERACTING] &&\n        !isEmpty(renderedExtent)) {\n      var projection = viewState.projection;\n      if (!ENABLE_RASTER_REPROJECTION) {\n        var sourceProjection = imageSource.getProjection();\n        if (sourceProjection) {\n          projection = sourceProjection;\n        }\n      }\n      var skippedFeatures = this.skippedFeatures_;\n      if (vectorRenderer) {\n        var context = vectorRenderer.context;\n        var imageFrameState = /** @type {import(\"../../PluggableMap.js\").FrameState} */ (assign({}, frameState, {\n          size: [\n            getWidth(renderedExtent) / viewResolution,\n            getHeight(renderedExtent) / viewResolution\n          ],\n          viewState: /** @type {import(\"../../View.js\").State} */ (assign({}, frameState.viewState, {\n            rotation: 0\n          }))\n        }));\n        var newSkippedFeatures = Object.keys(imageFrameState.skippedFeatureUids).sort();\n        image = new ImageCanvas(renderedExtent, viewResolution, pixelRatio, context.canvas, function(callback) {\n          if (vectorRenderer.prepareFrame(imageFrameState, layerState) &&\n              (vectorRenderer.replayGroupChanged ||\n              !equals(skippedFeatures, newSkippedFeatures))) {\n            context.canvas.width = imageFrameState.size[0] * pixelRatio;\n            context.canvas.height = imageFrameState.size[1] * pixelRatio;\n            vectorRenderer.compose(context, imageFrameState, layerState);\n            skippedFeatures = newSkippedFeatures;\n            callback();\n          }\n        });\n      } else {\n        image = imageSource.getImage(\n          renderedExtent, viewResolution, pixelRatio, projection);\n      }\n      if (image && this.loadImage(image)) {\n        this.image_ = image;\n        this.skippedFeatures_ = skippedFeatures;\n      }\n    }\n\n    if (this.image_) {\n      image = this.image_;\n      var imageExtent = image.getExtent();\n      var imageResolution = image.getResolution();\n      var imagePixelRatio = image.getPixelRatio();\n      var scale = pixelRatio * imageResolution /\n          (viewResolution * imagePixelRatio);\n      var transform = composeTransform(this.imageTransform_,\n        pixelRatio * size[0] / 2, pixelRatio * size[1] / 2,\n        scale, scale,\n        0,\n        imagePixelRatio * (imageExtent[0] - viewCenter[0]) / imageResolution,\n        imagePixelRatio * (viewCenter[1] - imageExtent[3]) / imageResolution);\n      composeTransform(this.coordinateToCanvasPixelTransform,\n        pixelRatio * size[0] / 2 - transform[4], pixelRatio * size[1] / 2 - transform[5],\n        pixelRatio / viewResolution, -pixelRatio / viewResolution,\n        0,\n        -viewCenter[0], -viewCenter[1]);\n\n      this.renderedResolution = imageResolution * pixelRatio / imagePixelRatio;\n    }\n\n    return !!this.image_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasImageLayerRenderer.prototype.forEachFeatureAtCoordinate = function forEachFeatureAtCoordinate (coordinate, frameState, hitTolerance, callback) {\n    if (this.vectorRenderer_) {\n      return this.vectorRenderer_.forEachFeatureAtCoordinate(coordinate, frameState, hitTolerance, callback);\n    } else {\n      return IntermediateCanvasRenderer.prototype.forEachFeatureAtCoordinate.call(this, coordinate, frameState, hitTolerance, callback);\n    }\n  };\n\n  return CanvasImageLayerRenderer;\n}(IntermediateCanvasRenderer));\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {import(\"../../layer/Layer.js\").default} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nCanvasImageLayerRenderer['handles'] = function(layer) {\n  return layer.getType() === LayerType.IMAGE ||\n    layer.getType() === LayerType.VECTOR &&\n    /** @type {import(\"../../layer/Vector.js\").default} */ (layer).getRenderMode() === VectorRenderType.IMAGE;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {import(\"../Map.js\").default} mapRenderer The map renderer.\n * @param {import(\"../../layer/Layer.js\").default} layer The layer to be rendererd.\n * @return {CanvasImageLayerRenderer} The layer renderer.\n */\nCanvasImageLayerRenderer['create'] = function(mapRenderer, layer) {\n  return new CanvasImageLayerRenderer(/** @type {import(\"../../layer/Image.js\").default} */ (layer));\n};\n\n\nexport default CanvasImageLayerRenderer;\n\n//# sourceMappingURL=ImageLayer.js.map","/**\n * @module ol/TileRange\n */\n\n/**\n * A representation of a contiguous block of tiles.  A tile range is specified\n * by its min/max tile coordinates and is inclusive of coordinates.\n */\nvar TileRange = function TileRange(minX, maxX, minY, maxY) {\n\n  /**\n   * @type {number}\n   */\n  this.minX = minX;\n\n  /**\n   * @type {number}\n   */\n  this.maxX = maxX;\n\n  /**\n   * @type {number}\n   */\n  this.minY = minY;\n\n  /**\n   * @type {number}\n   */\n  this.maxY = maxY;\n\n};\n\n/**\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @return {boolean} Contains tile coordinate.\n */\nTileRange.prototype.contains = function contains (tileCoord) {\n  return this.containsXY(tileCoord[1], tileCoord[2]);\n};\n\n/**\n * @param {TileRange} tileRange Tile range.\n * @return {boolean} Contains.\n */\nTileRange.prototype.containsTileRange = function containsTileRange (tileRange) {\n  return this.minX <= tileRange.minX && tileRange.maxX <= this.maxX &&\n     this.minY <= tileRange.minY && tileRange.maxY <= this.maxY;\n};\n\n/**\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n * @return {boolean} Contains coordinate.\n */\nTileRange.prototype.containsXY = function containsXY (x, y) {\n  return this.minX <= x && x <= this.maxX && this.minY <= y && y <= this.maxY;\n};\n\n/**\n * @param {TileRange} tileRange Tile range.\n * @return {boolean} Equals.\n */\nTileRange.prototype.equals = function equals (tileRange) {\n  return this.minX == tileRange.minX && this.minY == tileRange.minY &&\n     this.maxX == tileRange.maxX && this.maxY == tileRange.maxY;\n};\n\n/**\n * @param {TileRange} tileRange Tile range.\n */\nTileRange.prototype.extend = function extend (tileRange) {\n  if (tileRange.minX < this.minX) {\n    this.minX = tileRange.minX;\n  }\n  if (tileRange.maxX > this.maxX) {\n    this.maxX = tileRange.maxX;\n  }\n  if (tileRange.minY < this.minY) {\n    this.minY = tileRange.minY;\n  }\n  if (tileRange.maxY > this.maxY) {\n    this.maxY = tileRange.maxY;\n  }\n};\n\n/**\n * @return {number} Height.\n */\nTileRange.prototype.getHeight = function getHeight () {\n  return this.maxY - this.minY + 1;\n};\n\n/**\n * @return {import(\"./size.js\").Size} Size.\n */\nTileRange.prototype.getSize = function getSize () {\n  return [this.getWidth(), this.getHeight()];\n};\n\n/**\n * @return {number} Width.\n */\nTileRange.prototype.getWidth = function getWidth () {\n  return this.maxX - this.minX + 1;\n};\n\n/**\n * @param {TileRange} tileRange Tile range.\n * @return {boolean} Intersects.\n */\nTileRange.prototype.intersects = function intersects (tileRange) {\n  return this.minX <= tileRange.maxX &&\n     this.maxX >= tileRange.minX &&\n     this.minY <= tileRange.maxY &&\n     this.maxY >= tileRange.minY;\n};\n\n\n/**\n * @param {number} minX Minimum X.\n * @param {number} maxX Maximum X.\n * @param {number} minY Minimum Y.\n * @param {number} maxY Maximum Y.\n * @param {TileRange=} tileRange TileRange.\n * @return {TileRange} Tile range.\n */\nexport function createOrUpdate(minX, maxX, minY, maxY, tileRange) {\n  if (tileRange !== undefined) {\n    tileRange.minX = minX;\n    tileRange.maxX = maxX;\n    tileRange.minY = minY;\n    tileRange.maxY = maxY;\n    return tileRange;\n  } else {\n    return new TileRange(minX, maxX, minY, maxY);\n  }\n}\n\n\nexport default TileRange;\n\n//# sourceMappingURL=TileRange.js.map","/**\n * @module ol/renderer/canvas/TileLayer\n */\nimport {getUid} from '../../util.js';\nimport LayerType from '../../LayerType.js';\nimport TileRange from '../../TileRange.js';\nimport TileState from '../../TileState.js';\nimport ViewHint from '../../ViewHint.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {containsExtent, createEmpty, equals, getIntersection, isEmpty} from '../../extent.js';\nimport IntermediateCanvasRenderer from './IntermediateCanvas.js';\nimport {create as createTransform, compose as composeTransform} from '../../transform.js';\n\n/**\n * @classdesc\n * Canvas renderer for tile layers.\n * @api\n */\nvar CanvasTileLayerRenderer = /*@__PURE__*/(function (IntermediateCanvasRenderer) {\n  function CanvasTileLayerRenderer(tileLayer, opt_noContext) {\n\n    IntermediateCanvasRenderer.call(this, tileLayer);\n\n    /**\n     * @protected\n     * @type {CanvasRenderingContext2D}\n     */\n    this.context = opt_noContext ? null : createCanvasContext2D();\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.oversampling_;\n\n    /**\n     * @private\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.renderedExtent_ = null;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.renderedRevision;\n\n    /**\n     * @protected\n     * @type {!Array<import(\"../../Tile.js\").default>}\n     */\n    this.renderedTiles = [];\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.newTiles_ = false;\n\n    /**\n     * @protected\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.tmpExtent = createEmpty();\n\n    /**\n     * @private\n     * @type {import(\"../../TileRange.js\").default}\n     */\n    this.tmpTileRange_ = new TileRange(0, 0, 0, 0);\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.imageTransform_ = createTransform();\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.zDirection = 0;\n\n  }\n\n  if ( IntermediateCanvasRenderer ) CanvasTileLayerRenderer.__proto__ = IntermediateCanvasRenderer;\n  CanvasTileLayerRenderer.prototype = Object.create( IntermediateCanvasRenderer && IntermediateCanvasRenderer.prototype );\n  CanvasTileLayerRenderer.prototype.constructor = CanvasTileLayerRenderer;\n\n  /**\n   * @private\n   * @param {import(\"../../Tile.js\").default} tile Tile.\n   * @return {boolean} Tile is drawable.\n   */\n  CanvasTileLayerRenderer.prototype.isDrawableTile_ = function isDrawableTile_ (tile) {\n    var tileLayer = /** @type {import(\"../../layer/Tile.js\").default} */ (this.getLayer());\n    var tileState = tile.getState();\n    var useInterimTilesOnError = tileLayer.getUseInterimTilesOnError();\n    return tileState == TileState.LOADED ||\n        tileState == TileState.EMPTY ||\n        tileState == TileState.ERROR && !useInterimTilesOnError;\n  };\n\n  /**\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../../proj/Projection.js\").default} projection Projection.\n   * @return {!import(\"../../Tile.js\").default} Tile.\n   */\n  CanvasTileLayerRenderer.prototype.getTile = function getTile (z, x, y, pixelRatio, projection) {\n    var tileLayer = /** @type {import(\"../../layer/Tile.js\").default} */ (this.getLayer());\n    var tileSource = /** @type {import(\"../../source/Tile.js\").default} */ (tileLayer.getSource());\n    var tile = tileSource.getTile(z, x, y, pixelRatio, projection);\n    if (tile.getState() == TileState.ERROR) {\n      if (!tileLayer.getUseInterimTilesOnError()) {\n        // When useInterimTilesOnError is false, we consider the error tile as loaded.\n        tile.setState(TileState.LOADED);\n      } else if (tileLayer.getPreload() > 0) {\n        // Preloaded tiles for lower resolutions might have finished loading.\n        this.newTiles_ = true;\n      }\n    }\n    if (!this.isDrawableTile_(tile)) {\n      tile = tile.getInterimTile();\n    }\n    return tile;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasTileLayerRenderer.prototype.prepareFrame = function prepareFrame (frameState, layerState) {\n\n    var pixelRatio = frameState.pixelRatio;\n    var size = frameState.size;\n    var viewState = frameState.viewState;\n    var projection = viewState.projection;\n    var viewResolution = viewState.resolution;\n    var viewCenter = viewState.center;\n\n    var tileLayer = /** @type {import(\"../../layer/Tile.js\").default} */ (this.getLayer());\n    var tileSource = /** @type {import(\"../../source/Tile.js\").default} */ (tileLayer.getSource());\n    var sourceRevision = tileSource.getRevision();\n    var tileGrid = tileSource.getTileGridForProjection(projection);\n    var z = tileGrid.getZForResolution(viewResolution, this.zDirection);\n    var tileResolution = tileGrid.getResolution(z);\n    var oversampling = Math.round(viewResolution / tileResolution) || 1;\n    var extent = frameState.extent;\n\n    if (layerState.extent !== undefined) {\n      extent = getIntersection(extent, layerState.extent);\n    }\n    if (isEmpty(extent)) {\n      // Return false to prevent the rendering of the layer.\n      return false;\n    }\n\n    var tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z);\n    var imageExtent = tileGrid.getTileRangeExtent(z, tileRange);\n\n    var tilePixelRatio = tileSource.getTilePixelRatio(pixelRatio);\n\n    /**\n     * @type {Object<number, Object<string, import(\"../../Tile.js\").default>>}\n     */\n    var tilesToDrawByZ = {};\n    tilesToDrawByZ[z] = {};\n\n    var findLoadedTiles = this.createLoadedTileFinder(\n      tileSource, projection, tilesToDrawByZ);\n\n    var hints = frameState.viewHints;\n    var animatingOrInteracting = hints[ViewHint.ANIMATING] || hints[ViewHint.INTERACTING];\n\n    var tmpExtent = this.tmpExtent;\n    var tmpTileRange = this.tmpTileRange_;\n    this.newTiles_ = false;\n    var tile, x, y;\n    for (x = tileRange.minX; x <= tileRange.maxX; ++x) {\n      for (y = tileRange.minY; y <= tileRange.maxY; ++y) {\n        if (Date.now() - frameState.time > 16 && animatingOrInteracting) {\n          continue;\n        }\n        tile = this.getTile(z, x, y, pixelRatio, projection);\n        if (this.isDrawableTile_(tile)) {\n          var uid = getUid(this);\n          if (tile.getState() == TileState.LOADED) {\n            tilesToDrawByZ[z][tile.tileCoord.toString()] = tile;\n            var inTransition = tile.inTransition(uid);\n            if (!this.newTiles_ && (inTransition || this.renderedTiles.indexOf(tile) === -1)) {\n              this.newTiles_ = true;\n            }\n          }\n          if (tile.getAlpha(uid, frameState.time) === 1) {\n            // don't look for alt tiles if alpha is 1\n            continue;\n          }\n        }\n\n        var childTileRange = tileGrid.getTileCoordChildTileRange(\n          tile.tileCoord, tmpTileRange, tmpExtent);\n        var covered = false;\n        if (childTileRange) {\n          covered = findLoadedTiles(z + 1, childTileRange);\n        }\n        if (!covered) {\n          tileGrid.forEachTileCoordParentTileRange(\n            tile.tileCoord, findLoadedTiles, null, tmpTileRange, tmpExtent);\n        }\n\n      }\n    }\n\n    var renderedResolution = tileResolution * pixelRatio / tilePixelRatio * oversampling;\n    if (!(this.renderedResolution && Date.now() - frameState.time > 16 && animatingOrInteracting) && (\n      this.newTiles_ ||\n          !(this.renderedExtent_ && containsExtent(this.renderedExtent_, extent)) ||\n          this.renderedRevision != sourceRevision ||\n          oversampling != this.oversampling_ ||\n          !animatingOrInteracting && renderedResolution != this.renderedResolution\n    )) {\n\n      var context = this.context;\n      if (context) {\n        var tilePixelSize = tileSource.getTilePixelSize(z, pixelRatio, projection);\n        var width = Math.round(tileRange.getWidth() * tilePixelSize[0] / oversampling);\n        var height = Math.round(tileRange.getHeight() * tilePixelSize[1] / oversampling);\n        var canvas = context.canvas;\n        if (canvas.width != width || canvas.height != height) {\n          this.oversampling_ = oversampling;\n          canvas.width = width;\n          canvas.height = height;\n        } else {\n          if ((this.renderedExtent_ && !equals(imageExtent, this.renderedExtent_)) ||\n              this.renderedRevision != sourceRevision) {\n            context.clearRect(0, 0, width, height);\n          }\n          oversampling = this.oversampling_;\n        }\n      }\n\n      this.renderedTiles.length = 0;\n      /** @type {Array<number>} */\n      var zs = Object.keys(tilesToDrawByZ).map(Number);\n      zs.sort(function(a, b) {\n        if (a === z) {\n          return 1;\n        } else if (b === z) {\n          return -1;\n        } else {\n          return a > b ? 1 : a < b ? -1 : 0;\n        }\n      });\n      var currentResolution, currentScale, currentTilePixelSize, currentZ, i, ii;\n      var tileExtent, tileGutter, tilesToDraw, w, h;\n      for (i = 0, ii = zs.length; i < ii; ++i) {\n        currentZ = zs[i];\n        currentTilePixelSize = tileSource.getTilePixelSize(currentZ, pixelRatio, projection);\n        currentResolution = tileGrid.getResolution(currentZ);\n        currentScale = currentResolution / tileResolution;\n        tileGutter = tilePixelRatio * tileSource.getGutterForProjection(projection);\n        tilesToDraw = tilesToDrawByZ[currentZ];\n        for (var tileCoordKey in tilesToDraw) {\n          tile = tilesToDraw[tileCoordKey];\n          tileExtent = tileGrid.getTileCoordExtent(tile.getTileCoord(), tmpExtent);\n          x = (tileExtent[0] - imageExtent[0]) / tileResolution * tilePixelRatio / oversampling;\n          y = (imageExtent[3] - tileExtent[3]) / tileResolution * tilePixelRatio / oversampling;\n          w = currentTilePixelSize[0] * currentScale / oversampling;\n          h = currentTilePixelSize[1] * currentScale / oversampling;\n          this.drawTileImage(tile, frameState, layerState, x, y, w, h, tileGutter, z === currentZ);\n          this.renderedTiles.push(tile);\n        }\n      }\n\n      this.renderedRevision = sourceRevision;\n      this.renderedResolution = tileResolution * pixelRatio / tilePixelRatio * oversampling;\n      this.renderedExtent_ = imageExtent;\n    }\n\n    var scale = this.renderedResolution / viewResolution;\n    var transform = composeTransform(this.imageTransform_,\n      pixelRatio * size[0] / 2, pixelRatio * size[1] / 2,\n      scale, scale,\n      0,\n      (this.renderedExtent_[0] - viewCenter[0]) / this.renderedResolution * pixelRatio,\n      (viewCenter[1] - this.renderedExtent_[3]) / this.renderedResolution * pixelRatio);\n    composeTransform(this.coordinateToCanvasPixelTransform,\n      pixelRatio * size[0] / 2 - transform[4], pixelRatio * size[1] / 2 - transform[5],\n      pixelRatio / viewResolution, -pixelRatio / viewResolution,\n      0,\n      -viewCenter[0], -viewCenter[1]);\n\n\n    this.updateUsedTiles(frameState.usedTiles, tileSource, z, tileRange);\n    this.manageTilePyramid(frameState, tileSource, tileGrid, pixelRatio,\n      projection, extent, z, tileLayer.getPreload());\n    this.scheduleExpireCache(frameState, tileSource);\n\n    return this.renderedTiles.length > 0;\n  };\n\n  /**\n   * @param {import(\"../../Tile.js\").default} tile Tile.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../layer/Layer.js\").State} layerState Layer state.\n   * @param {number} x Left of the tile.\n   * @param {number} y Top of the tile.\n   * @param {number} w Width of the tile.\n   * @param {number} h Height of the tile.\n   * @param {number} gutter Tile gutter.\n   * @param {boolean} transition Apply an alpha transition.\n   */\n  CanvasTileLayerRenderer.prototype.drawTileImage = function drawTileImage (tile, frameState, layerState, x, y, w, h, gutter, transition) {\n    var image = this.getTileImage(tile);\n    if (!image) {\n      return;\n    }\n    var uid = getUid(this);\n    var alpha = transition ? tile.getAlpha(uid, frameState.time) : 1;\n    var tileLayer = /** @type {import(\"../../layer/Tile.js\").default} */ (this.getLayer());\n    var tileSource = /** @type {import(\"../../source/Tile.js\").default} */ (tileLayer.getSource());\n    if (alpha === 1 && !tileSource.getOpaque(frameState.viewState.projection)) {\n      this.context.clearRect(x, y, w, h);\n    }\n    var alphaChanged = alpha !== this.context.globalAlpha;\n    if (alphaChanged) {\n      this.context.save();\n      this.context.globalAlpha = alpha;\n    }\n    this.context.drawImage(image, gutter, gutter,\n      image.width - 2 * gutter, image.height - 2 * gutter, x, y, w, h);\n\n    if (alphaChanged) {\n      this.context.restore();\n    }\n    if (alpha !== 1) {\n      frameState.animate = true;\n    } else if (transition) {\n      tile.endTransition(uid);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasTileLayerRenderer.prototype.getImage = function getImage () {\n    var context = this.context;\n    return context ? context.canvas : null;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasTileLayerRenderer.prototype.getImageTransform = function getImageTransform () {\n    return this.imageTransform_;\n  };\n\n  /**\n   * Get the image from a tile.\n   * @param {import(\"../../Tile.js\").default} tile Tile.\n   * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.\n   * @protected\n   */\n  CanvasTileLayerRenderer.prototype.getTileImage = function getTileImage (tile) {\n    return /** @type {import(\"../../ImageTile.js\").default} */ (tile).getImage();\n  };\n\n  return CanvasTileLayerRenderer;\n}(IntermediateCanvasRenderer));\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {import(\"../../layer/Layer.js\").default} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nCanvasTileLayerRenderer['handles'] = function(layer) {\n  return layer.getType() === LayerType.TILE;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {import(\"../Map.js\").default} mapRenderer The map renderer.\n * @param {import(\"../../layer/Layer.js\").default} layer The layer to be rendererd.\n * @return {CanvasTileLayerRenderer} The layer renderer.\n */\nCanvasTileLayerRenderer['create'] = function(mapRenderer, layer) {\n  return new CanvasTileLayerRenderer(/** @type {import(\"../../layer/Tile.js\").default} */ (layer));\n};\n\n\n/**\n * @function\n * @return {import(\"../../layer/Tile.js\").default|import(\"../../layer/VectorTile.js\").default}\n */\nCanvasTileLayerRenderer.prototype.getLayer;\n\n\nexport default CanvasTileLayerRenderer;\n\n//# sourceMappingURL=TileLayer.js.map","/**\n * @module ol/render/ReplayGroup\n */\nimport {abstract} from '../util.js';\n\n/**\n * Base class for replay groups.\n */\nvar ReplayGroup = function ReplayGroup () {};\n\nReplayGroup.prototype.getReplay = function getReplay (zIndex, replayType) {\n  return abstract();\n};\n\n/**\n * @abstract\n * @return {boolean} Is empty.\n */\nReplayGroup.prototype.isEmpty = function isEmpty () {\n  return abstract();\n};\n\n/**\n * @abstract\n * @param {boolean} group Group with previous replay\n * @return {Array<*>} The resulting instruction group\n */\nReplayGroup.prototype.addDeclutter = function addDeclutter (group) {\n  return abstract();\n};\n\nexport default ReplayGroup;\n\n//# sourceMappingURL=ReplayGroup.js.map","/**\n * @module ol/render/ReplayType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  CIRCLE: 'Circle',\n  DEFAULT: 'Default',\n  IMAGE: 'Image',\n  LINE_STRING: 'LineString',\n  POLYGON: 'Polygon',\n  TEXT: 'Text'\n};\n\n//# sourceMappingURL=ReplayType.js.map","/**\n * @module ol/geom/flat/length\n */\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {number} Length.\n */\nexport function lineStringLength(flatCoordinates, offset, end, stride) {\n  var x1 = flatCoordinates[offset];\n  var y1 = flatCoordinates[offset + 1];\n  var length = 0;\n  for (var i = offset + stride; i < end; i += stride) {\n    var x2 = flatCoordinates[i];\n    var y2 = flatCoordinates[i + 1];\n    length += Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));\n    x1 = x2;\n    y1 = y2;\n  }\n  return length;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {number} Perimeter.\n */\nexport function linearRingLength(flatCoordinates, offset, end, stride) {\n  var perimeter = lineStringLength(flatCoordinates, offset, end, stride);\n  var dx = flatCoordinates[end - stride] - flatCoordinates[offset];\n  var dy = flatCoordinates[end - stride + 1] - flatCoordinates[offset + 1];\n  perimeter += Math.sqrt(dx * dx + dy * dy);\n  return perimeter;\n}\n\n//# sourceMappingURL=length.js.map","/**\n * @module ol/geom/flat/textpath\n */\nimport {lerp} from '../../math.js';\n\n\n/**\n * @param {Array<number>} flatCoordinates Path to put text on.\n * @param {number} offset Start offset of the `flatCoordinates`.\n * @param {number} end End offset of the `flatCoordinates`.\n * @param {number} stride Stride.\n * @param {string} text Text to place on the path.\n * @param {function(string):number} measure Measure function returning the\n * width of the character passed as 1st argument.\n * @param {number} startM m along the path where the text starts.\n * @param {number} maxAngle Max angle between adjacent chars in radians.\n * @return {Array<Array<*>>} The result array of null if `maxAngle` was\n * exceeded. Entries of the array are x, y, anchorX, angle, chunk.\n */\nexport function drawTextOnPath(\n  flatCoordinates, offset, end, stride, text, measure, startM, maxAngle) {\n  var result = [];\n\n  // Keep text upright\n  var reverse = flatCoordinates[offset] > flatCoordinates[end - stride];\n\n  var numChars = text.length;\n\n  var x1 = flatCoordinates[offset];\n  var y1 = flatCoordinates[offset + 1];\n  offset += stride;\n  var x2 = flatCoordinates[offset];\n  var y2 = flatCoordinates[offset + 1];\n  var segmentM = 0;\n  var segmentLength = Math.sqrt(Math.pow(x2 - x1, 2) + Math.pow(y2 - y1, 2));\n\n  var chunk = '';\n  var chunkLength = 0;\n  var data, index, previousAngle;\n  for (var i = 0; i < numChars; ++i) {\n    index = reverse ? numChars - i - 1 : i;\n    var char = text.charAt(index);\n    chunk = reverse ? char + chunk : chunk + char;\n    var charLength = measure(chunk) - chunkLength;\n    chunkLength += charLength;\n    var charM = startM + charLength / 2;\n    while (offset < end - stride && segmentM + segmentLength < charM) {\n      x1 = x2;\n      y1 = y2;\n      offset += stride;\n      x2 = flatCoordinates[offset];\n      y2 = flatCoordinates[offset + 1];\n      segmentM += segmentLength;\n      segmentLength = Math.sqrt(Math.pow(x2 - x1, 2) + Math.pow(y2 - y1, 2));\n    }\n    var segmentPos = charM - segmentM;\n    var angle = Math.atan2(y2 - y1, x2 - x1);\n    if (reverse) {\n      angle += angle > 0 ? -Math.PI : Math.PI;\n    }\n    if (previousAngle !== undefined) {\n      var delta = angle - previousAngle;\n      delta += (delta > Math.PI) ? -2 * Math.PI : (delta < -Math.PI) ? 2 * Math.PI : 0;\n      if (Math.abs(delta) > maxAngle) {\n        return null;\n      }\n    }\n    var interpolate = segmentPos / segmentLength;\n    var x = lerp(x1, x2, interpolate);\n    var y = lerp(y1, y2, interpolate);\n    if (previousAngle == angle) {\n      if (reverse) {\n        data[0] = x;\n        data[1] = y;\n        data[2] = charLength / 2;\n      }\n      data[4] = chunk;\n    } else {\n      chunk = char;\n      chunkLength = charLength;\n      data = [x, y, charLength / 2, angle, chunk];\n      if (reverse) {\n        result.unshift(data);\n      } else {\n        result.push(data);\n      }\n      previousAngle = angle;\n    }\n    startM += charLength;\n  }\n  return result;\n}\n\n//# sourceMappingURL=textpath.js.map","/**\n * @module ol/render/canvas/Instruction\n */\n\n/**\n * @enum {number}\n */\nvar Instruction = {\n  BEGIN_GEOMETRY: 0,\n  BEGIN_PATH: 1,\n  CIRCLE: 2,\n  CLOSE_PATH: 3,\n  CUSTOM: 4,\n  DRAW_CHARS: 5,\n  DRAW_IMAGE: 6,\n  END_GEOMETRY: 7,\n  FILL: 8,\n  MOVE_TO_LINE_TO: 9,\n  SET_FILL_STYLE: 10,\n  SET_STROKE_STYLE: 11,\n  STROKE: 12\n};\n\n\n/**\n * @type {Array<Instruction>}\n */\nexport var fillInstruction = [Instruction.FILL];\n\n\n/**\n * @type {Array<Instruction>}\n */\nexport var strokeInstruction = [Instruction.STROKE];\n\n\n/**\n * @type {Array<Instruction>}\n */\nexport var beginPathInstruction = [Instruction.BEGIN_PATH];\n\n\n/**\n * @type {Array<Instruction>}\n */\nexport var closePathInstruction = [Instruction.CLOSE_PATH];\n\n\nexport default Instruction;\n\n//# sourceMappingURL=Instruction.js.map","/**\n * @module ol/render/replay\n */\nimport ReplayType from './ReplayType.js';\n\n\n/**\n * @const\n * @type {Array<ReplayType>}\n */\nexport var ORDER = [\n  ReplayType.POLYGON,\n  ReplayType.CIRCLE,\n  ReplayType.LINE_STRING,\n  ReplayType.IMAGE,\n  ReplayType.TEXT,\n  ReplayType.DEFAULT\n];\n\n/**\n * @const\n * @enum {number}\n */\nexport var TEXT_ALIGN = {};\nTEXT_ALIGN['left'] = 0;\nTEXT_ALIGN['end'] = 0;\nTEXT_ALIGN['center'] = 0.5;\nTEXT_ALIGN['right'] = 1;\nTEXT_ALIGN['start'] = 1;\nTEXT_ALIGN['top'] = 0;\nTEXT_ALIGN['middle'] = 0.5;\nTEXT_ALIGN['hanging'] = 0.2;\nTEXT_ALIGN['alphabetic'] = 0.8;\nTEXT_ALIGN['ideographic'] = 0.8;\nTEXT_ALIGN['bottom'] = 1;\n\n//# sourceMappingURL=replay.js.map","/**\n * @module ol/render/canvas/Replay\n */\nimport {getUid} from '../../util.js';\nimport {equals, reverseSubArray} from '../../array.js';\nimport {asColorLike} from '../../colorlike.js';\nimport {buffer, clone, coordinateRelationship, createEmpty, createOrUpdate,\n  createOrUpdateEmpty, extend, extendCoordinate, intersects} from '../../extent.js';\nimport Relationship from '../../extent/Relationship.js';\nimport GeometryType from '../../geom/GeometryType.js';\nimport {inflateCoordinates, inflateCoordinatesArray, inflateMultiCoordinatesArray} from '../../geom/flat/inflate.js';\nimport {lineStringLength} from '../../geom/flat/length.js';\nimport {drawTextOnPath} from '../../geom/flat/textpath.js';\nimport {transform2D} from '../../geom/flat/transform.js';\nimport {CANVAS_LINE_DASH} from '../../has.js';\nimport {isEmpty} from '../../obj.js';\nimport VectorContext from '../VectorContext.js';\nimport {drawImage, resetTransform, defaultPadding, defaultFillStyle, defaultStrokeStyle,\n  defaultMiterLimit, defaultLineWidth, defaultLineJoin, defaultLineDashOffset,\n  defaultLineDash, defaultLineCap} from '../canvas.js';\nimport CanvasInstruction from './Instruction.js';\nimport {TEXT_ALIGN} from '../replay.js';\nimport {\n  create as createTransform,\n  compose as composeTransform,\n  apply as applyTransform,\n  setFromArray as transformSetFromArray\n} from '../../transform.js';\n\n\n/**\n * @type {import(\"../../extent.js\").Extent}\n */\nvar tmpExtent = createEmpty();\n\n\n/**\n * @type {!import(\"../../transform.js\").Transform}\n */\nvar tmpTransform = createTransform();\n\n\nvar CanvasReplay = /*@__PURE__*/(function (VectorContext) {\n  function CanvasReplay(tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree) {\n    VectorContext.call(this);\n\n    /**\n     * @type {?}\n     */\n    this.declutterTree = declutterTree;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.tolerance = tolerance;\n\n    /**\n     * @protected\n     * @const\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.maxExtent = maxExtent;\n\n    /**\n     * @protected\n     * @type {boolean}\n     */\n    this.overlaps = overlaps;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.pixelRatio = pixelRatio;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.maxLineWidth = 0;\n\n    /**\n     * @protected\n     * @const\n     * @type {number}\n     */\n    this.resolution = resolution;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.alignFill_;\n\n    /**\n     * @private\n     * @type {Array<*>}\n     */\n    this.beginGeometryInstruction1_ = null;\n\n    /**\n     * @private\n     * @type {Array<*>}\n     */\n    this.beginGeometryInstruction2_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.bufferedMaxExtent_ = null;\n\n    /**\n     * @protected\n     * @type {Array<*>}\n     */\n    this.instructions = [];\n\n    /**\n     * @protected\n     * @type {Array<number>}\n     */\n    this.coordinates = [];\n\n    /**\n     * @private\n     * @type {!Object<number,import(\"../../coordinate.js\").Coordinate|Array<import(\"../../coordinate.js\").Coordinate>|Array<Array<import(\"../../coordinate.js\").Coordinate>>>}\n     */\n    this.coordinateCache_ = {};\n\n    /**\n     * @private\n     * @type {!import(\"../../transform.js\").Transform}\n     */\n    this.renderedTransform_ = createTransform();\n\n    /**\n     * @protected\n     * @type {Array<*>}\n     */\n    this.hitDetectionInstructions = [];\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.pixelCoordinates_ = null;\n\n    /**\n     * @protected\n     * @type {import(\"../canvas.js\").FillStrokeState}\n     */\n    this.state = /** @type {import(\"../canvas.js\").FillStrokeState} */ ({});\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.viewRotation_ = 0;\n\n  }\n\n  if ( VectorContext ) CanvasReplay.__proto__ = VectorContext;\n  CanvasReplay.prototype = Object.create( VectorContext && VectorContext.prototype );\n  CanvasReplay.prototype.constructor = CanvasReplay;\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../coordinate.js\").Coordinate} p1 1st point of the background box.\n   * @param {import(\"../../coordinate.js\").Coordinate} p2 2nd point of the background box.\n   * @param {import(\"../../coordinate.js\").Coordinate} p3 3rd point of the background box.\n   * @param {import(\"../../coordinate.js\").Coordinate} p4 4th point of the background box.\n   * @param {Array<*>} fillInstruction Fill instruction.\n   * @param {Array<*>} strokeInstruction Stroke instruction.\n   */\n  CanvasReplay.prototype.replayTextBackground_ = function replayTextBackground_ (context, p1, p2, p3, p4, fillInstruction, strokeInstruction) {\n    context.beginPath();\n    context.moveTo.apply(context, p1);\n    context.lineTo.apply(context, p2);\n    context.lineTo.apply(context, p3);\n    context.lineTo.apply(context, p4);\n    context.lineTo.apply(context, p1);\n    if (fillInstruction) {\n      this.alignFill_ = /** @type {boolean} */ (fillInstruction[2]);\n      this.fill_(context);\n    }\n    if (strokeInstruction) {\n      this.setStrokeStyle_(context, /** @type {Array<*>} */ (strokeInstruction));\n      context.stroke();\n    }\n  };\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @param {HTMLImageElement|HTMLCanvasElement|HTMLVideoElement} image Image.\n   * @param {number} anchorX Anchor X.\n   * @param {number} anchorY Anchor Y.\n   * @param {import(\"../canvas.js\").DeclutterGroup} declutterGroup Declutter group.\n   * @param {number} height Height.\n   * @param {number} opacity Opacity.\n   * @param {number} originX Origin X.\n   * @param {number} originY Origin Y.\n   * @param {number} rotation Rotation.\n   * @param {number} scale Scale.\n   * @param {boolean} snapToPixel Snap to pixel.\n   * @param {number} width Width.\n   * @param {Array<number>} padding Padding.\n   * @param {Array<*>} fillInstruction Fill instruction.\n   * @param {Array<*>} strokeInstruction Stroke instruction.\n   */\n  CanvasReplay.prototype.replayImage_ = function replayImage_ (\n    context,\n    x,\n    y,\n    image,\n    anchorX,\n    anchorY,\n    declutterGroup,\n    height,\n    opacity,\n    originX,\n    originY,\n    rotation,\n    scale,\n    snapToPixel,\n    width,\n    padding,\n    fillInstruction,\n    strokeInstruction\n  ) {\n    var fillStroke = fillInstruction || strokeInstruction;\n    anchorX *= scale;\n    anchorY *= scale;\n    x -= anchorX;\n    y -= anchorY;\n\n    var w = (width + originX > image.width) ? image.width - originX : width;\n    var h = (height + originY > image.height) ? image.height - originY : height;\n    var boxW = padding[3] + w * scale + padding[1];\n    var boxH = padding[0] + h * scale + padding[2];\n    var boxX = x - padding[3];\n    var boxY = y - padding[0];\n\n    /** @type {import(\"../../coordinate.js\").Coordinate} */\n    var p1;\n    /** @type {import(\"../../coordinate.js\").Coordinate} */\n    var p2;\n    /** @type {import(\"../../coordinate.js\").Coordinate} */\n    var p3;\n    /** @type {import(\"../../coordinate.js\").Coordinate} */\n    var p4;\n    if (fillStroke || rotation !== 0) {\n      p1 = [boxX, boxY];\n      p2 = [boxX + boxW, boxY];\n      p3 = [boxX + boxW, boxY + boxH];\n      p4 = [boxX, boxY + boxH];\n    }\n\n    var transform = null;\n    if (rotation !== 0) {\n      var centerX = x + anchorX;\n      var centerY = y + anchorY;\n      transform = composeTransform(tmpTransform, centerX, centerY, 1, 1, rotation, -centerX, -centerY);\n\n      createOrUpdateEmpty(tmpExtent);\n      extendCoordinate(tmpExtent, applyTransform(tmpTransform, p1));\n      extendCoordinate(tmpExtent, applyTransform(tmpTransform, p2));\n      extendCoordinate(tmpExtent, applyTransform(tmpTransform, p3));\n      extendCoordinate(tmpExtent, applyTransform(tmpTransform, p4));\n    } else {\n      createOrUpdate(boxX, boxY, boxX + boxW, boxY + boxH, tmpExtent);\n    }\n    var canvas = context.canvas;\n    var strokePadding = strokeInstruction ? (strokeInstruction[2] * scale / 2) : 0;\n    var intersects =\n        tmpExtent[0] - strokePadding <= canvas.width && tmpExtent[2] + strokePadding >= 0 &&\n        tmpExtent[1] - strokePadding <= canvas.height && tmpExtent[3] + strokePadding >= 0;\n\n    if (snapToPixel) {\n      x = Math.round(x);\n      y = Math.round(y);\n    }\n\n    if (declutterGroup) {\n      if (!intersects && declutterGroup[4] == 1) {\n        return;\n      }\n      extend(declutterGroup, tmpExtent);\n      var declutterArgs = intersects ?\n        [context, transform ? transform.slice(0) : null, opacity, image, originX, originY, w, h, x, y, scale] :\n        null;\n      if (declutterArgs && fillStroke) {\n        declutterArgs.push(fillInstruction, strokeInstruction, p1, p2, p3, p4);\n      }\n      declutterGroup.push(declutterArgs);\n    } else if (intersects) {\n      if (fillStroke) {\n        this.replayTextBackground_(context, p1, p2, p3, p4,\n          /** @type {Array<*>} */ (fillInstruction),\n          /** @type {Array<*>} */ (strokeInstruction));\n      }\n      drawImage(context, transform, opacity, image, originX, originY, w, h, x, y, scale);\n    }\n  };\n\n  /**\n   * @protected\n   * @param {Array<number>} dashArray Dash array.\n   * @return {Array<number>} Dash array with pixel ratio applied\n   */\n  CanvasReplay.prototype.applyPixelRatio = function applyPixelRatio (dashArray) {\n    var pixelRatio = this.pixelRatio;\n    return pixelRatio == 1 ? dashArray : dashArray.map(function(dash) {\n      return dash * pixelRatio;\n    });\n  };\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @param {boolean} closed Last input coordinate equals first.\n   * @param {boolean} skipFirst Skip first coordinate.\n   * @protected\n   * @return {number} My end.\n   */\n  CanvasReplay.prototype.appendFlatCoordinates = function appendFlatCoordinates (flatCoordinates, offset, end, stride, closed, skipFirst) {\n\n    var myEnd = this.coordinates.length;\n    var extent = this.getBufferedMaxExtent();\n    if (skipFirst) {\n      offset += stride;\n    }\n    var lastCoord = [flatCoordinates[offset], flatCoordinates[offset + 1]];\n    var nextCoord = [NaN, NaN];\n    var skipped = true;\n\n    var i, lastRel, nextRel;\n    for (i = offset + stride; i < end; i += stride) {\n      nextCoord[0] = flatCoordinates[i];\n      nextCoord[1] = flatCoordinates[i + 1];\n      nextRel = coordinateRelationship(extent, nextCoord);\n      if (nextRel !== lastRel) {\n        if (skipped) {\n          this.coordinates[myEnd++] = lastCoord[0];\n          this.coordinates[myEnd++] = lastCoord[1];\n        }\n        this.coordinates[myEnd++] = nextCoord[0];\n        this.coordinates[myEnd++] = nextCoord[1];\n        skipped = false;\n      } else if (nextRel === Relationship.INTERSECTING) {\n        this.coordinates[myEnd++] = nextCoord[0];\n        this.coordinates[myEnd++] = nextCoord[1];\n        skipped = false;\n      } else {\n        skipped = true;\n      }\n      lastCoord[0] = nextCoord[0];\n      lastCoord[1] = nextCoord[1];\n      lastRel = nextRel;\n    }\n\n    // Last coordinate equals first or only one point to append:\n    if ((closed && skipped) || i === offset + stride) {\n      this.coordinates[myEnd++] = lastCoord[0];\n      this.coordinates[myEnd++] = lastCoord[1];\n    }\n    return myEnd;\n  };\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {Array<number>} ends Ends.\n   * @param {number} stride Stride.\n   * @param {Array<number>} replayEnds Replay ends.\n   * @return {number} Offset.\n   */\n  CanvasReplay.prototype.drawCustomCoordinates_ = function drawCustomCoordinates_ (flatCoordinates, offset, ends, stride, replayEnds) {\n    for (var i = 0, ii = ends.length; i < ii; ++i) {\n      var end = ends[i];\n      var replayEnd = this.appendFlatCoordinates(flatCoordinates, offset, end, stride, false, false);\n      replayEnds.push(replayEnd);\n      offset = end;\n    }\n    return offset;\n  };\n\n  /**\n   * @inheritDoc.\n   */\n  CanvasReplay.prototype.drawCustom = function drawCustom (geometry, feature, renderer) {\n    this.beginGeometry(geometry, feature);\n    var type = geometry.getType();\n    var stride = geometry.getStride();\n    var replayBegin = this.coordinates.length;\n    var flatCoordinates, replayEnd, replayEnds, replayEndss;\n    var offset;\n    if (type == GeometryType.MULTI_POLYGON) {\n      geometry = /** @type {import(\"../../geom/MultiPolygon.js\").default} */ (geometry);\n      flatCoordinates = geometry.getOrientedFlatCoordinates();\n      replayEndss = [];\n      var endss = geometry.getEndss();\n      offset = 0;\n      for (var i = 0, ii = endss.length; i < ii; ++i) {\n        var myEnds = [];\n        offset = this.drawCustomCoordinates_(flatCoordinates, offset, endss[i], stride, myEnds);\n        replayEndss.push(myEnds);\n      }\n      this.instructions.push([CanvasInstruction.CUSTOM,\n        replayBegin, replayEndss, geometry, renderer, inflateMultiCoordinatesArray]);\n    } else if (type == GeometryType.POLYGON || type == GeometryType.MULTI_LINE_STRING) {\n      replayEnds = [];\n      flatCoordinates = (type == GeometryType.POLYGON) ?\n        /** @type {import(\"../../geom/Polygon.js\").default} */ (geometry).getOrientedFlatCoordinates() :\n        geometry.getFlatCoordinates();\n      offset = this.drawCustomCoordinates_(flatCoordinates, 0,\n        /** @type {import(\"../../geom/Polygon.js\").default|import(\"../../geom/MultiLineString.js\").default} */ (geometry).getEnds(),\n        stride, replayEnds);\n      this.instructions.push([CanvasInstruction.CUSTOM,\n        replayBegin, replayEnds, geometry, renderer, inflateCoordinatesArray]);\n    } else if (type == GeometryType.LINE_STRING || type == GeometryType.MULTI_POINT) {\n      flatCoordinates = geometry.getFlatCoordinates();\n      replayEnd = this.appendFlatCoordinates(\n        flatCoordinates, 0, flatCoordinates.length, stride, false, false);\n      this.instructions.push([CanvasInstruction.CUSTOM,\n        replayBegin, replayEnd, geometry, renderer, inflateCoordinates]);\n    } else if (type == GeometryType.POINT) {\n      flatCoordinates = geometry.getFlatCoordinates();\n      this.coordinates.push(flatCoordinates[0], flatCoordinates[1]);\n      replayEnd = this.coordinates.length;\n      this.instructions.push([CanvasInstruction.CUSTOM,\n        replayBegin, replayEnd, geometry, renderer]);\n    }\n    this.endGeometry(geometry, feature);\n  };\n\n  /**\n   * @protected\n   * @param {import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default} geometry Geometry.\n   * @param {import(\"../../Feature.js\").default|import(\"../Feature.js\").default} feature Feature.\n   */\n  CanvasReplay.prototype.beginGeometry = function beginGeometry (geometry, feature) {\n    this.beginGeometryInstruction1_ = [CanvasInstruction.BEGIN_GEOMETRY, feature, 0];\n    this.instructions.push(this.beginGeometryInstruction1_);\n    this.beginGeometryInstruction2_ = [CanvasInstruction.BEGIN_GEOMETRY, feature, 0];\n    this.hitDetectionInstructions.push(this.beginGeometryInstruction2_);\n  };\n\n  /**\n   * FIXME empty description for jsdoc\n   */\n  CanvasReplay.prototype.finish = function finish () {};\n\n  /**\n   * @private\n   * @param {CanvasRenderingContext2D} context Context.\n   */\n  CanvasReplay.prototype.fill_ = function fill_ (context) {\n    if (this.alignFill_) {\n      var origin = applyTransform(this.renderedTransform_, [0, 0]);\n      var repeatSize = 512 * this.pixelRatio;\n      context.translate(origin[0] % repeatSize, origin[1] % repeatSize);\n      context.rotate(this.viewRotation_);\n    }\n    context.fill();\n    if (this.alignFill_) {\n      context.setTransform.apply(context, resetTransform);\n    }\n  };\n\n  /**\n   * @private\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {Array<*>} instruction Instruction.\n   */\n  CanvasReplay.prototype.setStrokeStyle_ = function setStrokeStyle_ (context, instruction) {\n    context.strokeStyle = /** @type {import(\"../../colorlike.js\").ColorLike} */ (instruction[1]);\n    context.lineWidth = /** @type {number} */ (instruction[2]);\n    context.lineCap = /** @type {CanvasLineCap} */ (instruction[3]);\n    context.lineJoin = /** @type {CanvasLineJoin} */ (instruction[4]);\n    context.miterLimit = /** @type {number} */ (instruction[5]);\n    if (CANVAS_LINE_DASH) {\n      context.lineDashOffset = /** @type {number} */ (instruction[7]);\n      context.setLineDash(/** @type {Array<number>} */ (instruction[6]));\n    }\n  };\n\n  /**\n   * @param {import(\"../canvas.js\").DeclutterGroup} declutterGroup Declutter group.\n   * @param {import(\"../../Feature.js\").default|import(\"../Feature.js\").default} feature Feature.\n   */\n  CanvasReplay.prototype.renderDeclutter_ = function renderDeclutter_ (declutterGroup, feature) {\n    if (declutterGroup && declutterGroup.length > 5) {\n      var groupCount = declutterGroup[4];\n      if (groupCount == 1 || groupCount == declutterGroup.length - 5) {\n        /** @type {import(\"../../structs/RBush.js\").Entry} */\n        var box = {\n          minX: /** @type {number} */ (declutterGroup[0]),\n          minY: /** @type {number} */ (declutterGroup[1]),\n          maxX: /** @type {number} */ (declutterGroup[2]),\n          maxY: /** @type {number} */ (declutterGroup[3]),\n          value: feature\n        };\n        if (!this.declutterTree.collides(box)) {\n          this.declutterTree.insert(box);\n          for (var j = 5, jj = declutterGroup.length; j < jj; ++j) {\n            var declutterData = /** @type {Array} */ (declutterGroup[j]);\n            if (declutterData) {\n              if (declutterData.length > 11) {\n                this.replayTextBackground_(declutterData[0],\n                  declutterData[13], declutterData[14], declutterData[15], declutterData[16],\n                  declutterData[11], declutterData[12]);\n              }\n              drawImage.apply(undefined, declutterData);\n            }\n          }\n        }\n        declutterGroup.length = 5;\n        createOrUpdateEmpty(declutterGroup);\n      }\n    }\n  };\n\n  /**\n   * @private\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../transform.js\").Transform} transform Transform.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features\n   *     to skip.\n   * @param {Array<*>} instructions Instructions array.\n   * @param {boolean} snapToPixel Snap point symbols and text to integer pixels.\n   * @param {function((import(\"../../Feature.js\").default|import(\"../Feature.js\").default)): T|undefined} featureCallback Feature callback.\n   * @param {import(\"../../extent.js\").Extent=} opt_hitExtent Only check features that intersect this\n   *     extent.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  CanvasReplay.prototype.replay_ = function replay_ (\n    context,\n    transform,\n    skippedFeaturesHash,\n    instructions,\n    snapToPixel,\n    featureCallback,\n    opt_hitExtent\n  ) {\n    /** @type {Array<number>} */\n    var pixelCoordinates;\n    if (this.pixelCoordinates_ && equals(transform, this.renderedTransform_)) {\n      pixelCoordinates = this.pixelCoordinates_;\n    } else {\n      if (!this.pixelCoordinates_) {\n        this.pixelCoordinates_ = [];\n      }\n      pixelCoordinates = transform2D(\n        this.coordinates, 0, this.coordinates.length, 2,\n        transform, this.pixelCoordinates_);\n      transformSetFromArray(this.renderedTransform_, transform);\n    }\n    var skipFeatures = !isEmpty(skippedFeaturesHash);\n    var i = 0; // instruction index\n    var ii = instructions.length; // end of instructions\n    var d = 0; // data index\n    var dd; // end of per-instruction data\n    var anchorX, anchorY, prevX, prevY, roundX, roundY, declutterGroup, image;\n    var pendingFill = 0;\n    var pendingStroke = 0;\n    var lastFillInstruction = null;\n    var lastStrokeInstruction = null;\n    var coordinateCache = this.coordinateCache_;\n    var viewRotation = this.viewRotation_;\n\n    var state = /** @type {import(\"../../render.js\").State} */ ({\n      context: context,\n      pixelRatio: this.pixelRatio,\n      resolution: this.resolution,\n      rotation: viewRotation\n    });\n\n    // When the batch size gets too big, performance decreases. 200 is a good\n    // balance between batch size and number of fill/stroke instructions.\n    var batchSize = this.instructions != instructions || this.overlaps ? 0 : 200;\n    var /** @type {import(\"../../Feature.js\").default|import(\"../Feature.js\").default} */ feature;\n    var x, y;\n    while (i < ii) {\n      var instruction = instructions[i];\n      var type = /** @type {CanvasInstruction} */ (instruction[0]);\n      switch (type) {\n        case CanvasInstruction.BEGIN_GEOMETRY:\n          feature = /** @type {import(\"../../Feature.js\").default|import(\"../Feature.js\").default} */ (instruction[1]);\n          if ((skipFeatures && skippedFeaturesHash[getUid(feature)]) || !feature.getGeometry()) {\n            i = /** @type {number} */ (instruction[2]);\n          } else if (opt_hitExtent !== undefined && !intersects(\n            opt_hitExtent, feature.getGeometry().getExtent())) {\n            i = /** @type {number} */ (instruction[2]) + 1;\n          } else {\n            ++i;\n          }\n          break;\n        case CanvasInstruction.BEGIN_PATH:\n          if (pendingFill > batchSize) {\n            this.fill_(context);\n            pendingFill = 0;\n          }\n          if (pendingStroke > batchSize) {\n            context.stroke();\n            pendingStroke = 0;\n          }\n          if (!pendingFill && !pendingStroke) {\n            context.beginPath();\n            prevX = prevY = NaN;\n          }\n          ++i;\n          break;\n        case CanvasInstruction.CIRCLE:\n          d = /** @type {number} */ (instruction[1]);\n          var x1 = pixelCoordinates[d];\n          var y1 = pixelCoordinates[d + 1];\n          var x2 = pixelCoordinates[d + 2];\n          var y2 = pixelCoordinates[d + 3];\n          var dx = x2 - x1;\n          var dy = y2 - y1;\n          var r = Math.sqrt(dx * dx + dy * dy);\n          context.moveTo(x1 + r, y1);\n          context.arc(x1, y1, r, 0, 2 * Math.PI, true);\n          ++i;\n          break;\n        case CanvasInstruction.CLOSE_PATH:\n          context.closePath();\n          ++i;\n          break;\n        case CanvasInstruction.CUSTOM:\n          d = /** @type {number} */ (instruction[1]);\n          dd = instruction[2];\n          var geometry = /** @type {import(\"../../geom/SimpleGeometry.js\").default} */ (instruction[3]);\n          var renderer = instruction[4];\n          var fn = instruction.length == 6 ? instruction[5] : undefined;\n          state.geometry = geometry;\n          state.feature = feature;\n          if (!(i in coordinateCache)) {\n            coordinateCache[i] = [];\n          }\n          var coords = coordinateCache[i];\n          if (fn) {\n            fn(pixelCoordinates, d, dd, 2, coords);\n          } else {\n            coords[0] = pixelCoordinates[d];\n            coords[1] = pixelCoordinates[d + 1];\n            coords.length = 2;\n          }\n          renderer(coords, state);\n          ++i;\n          break;\n        case CanvasInstruction.DRAW_IMAGE:\n          d = /** @type {number} */ (instruction[1]);\n          dd = /** @type {number} */ (instruction[2]);\n          image = /** @type {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement} */\n              (instruction[3]);\n          // Remaining arguments in DRAW_IMAGE are in alphabetical order\n          anchorX = /** @type {number} */ (instruction[4]);\n          anchorY = /** @type {number} */ (instruction[5]);\n          declutterGroup = featureCallback ? null : /** @type {import(\"../canvas.js\").DeclutterGroup} */ (instruction[6]);\n          var height = /** @type {number} */ (instruction[7]);\n          var opacity = /** @type {number} */ (instruction[8]);\n          var originX = /** @type {number} */ (instruction[9]);\n          var originY = /** @type {number} */ (instruction[10]);\n          var rotateWithView = /** @type {boolean} */ (instruction[11]);\n          var rotation = /** @type {number} */ (instruction[12]);\n          var scale = /** @type {number} */ (instruction[13]);\n          var width = /** @type {number} */ (instruction[14]);\n\n          var padding = (void 0), backgroundFill = (void 0), backgroundStroke = (void 0);\n          if (instruction.length > 16) {\n            padding = /** @type {Array<number>} */ (instruction[15]);\n            backgroundFill = /** @type {boolean} */ (instruction[16]);\n            backgroundStroke = /** @type {boolean} */ (instruction[17]);\n          } else {\n            padding = defaultPadding;\n            backgroundFill = backgroundStroke = false;\n          }\n\n          if (rotateWithView) {\n            rotation += viewRotation;\n          }\n          for (; d < dd; d += 2) {\n            this.replayImage_(context,\n              pixelCoordinates[d], pixelCoordinates[d + 1], image, anchorX, anchorY,\n              declutterGroup, height, opacity, originX, originY, rotation, scale,\n              snapToPixel, width, padding,\n              backgroundFill ? /** @type {Array<*>} */ (lastFillInstruction) : null,\n              backgroundStroke ? /** @type {Array<*>} */ (lastStrokeInstruction) : null);\n          }\n          this.renderDeclutter_(declutterGroup, feature);\n          ++i;\n          break;\n        case CanvasInstruction.DRAW_CHARS:\n          var begin = /** @type {number} */ (instruction[1]);\n          var end = /** @type {number} */ (instruction[2]);\n          var baseline = /** @type {number} */ (instruction[3]);\n          declutterGroup = featureCallback ? null : /** @type {import(\"../canvas.js\").DeclutterGroup} */ (instruction[4]);\n          var overflow = /** @type {number} */ (instruction[5]);\n          var fillKey = /** @type {string} */ (instruction[6]);\n          var maxAngle = /** @type {number} */ (instruction[7]);\n          var measure = /** @type {function(string):number} */ (instruction[8]);\n          var offsetY = /** @type {number} */ (instruction[9]);\n          var strokeKey = /** @type {string} */ (instruction[10]);\n          var strokeWidth = /** @type {number} */ (instruction[11]);\n          var text = /** @type {string} */ (instruction[12]);\n          var textKey = /** @type {string} */ (instruction[13]);\n          var textScale = /** @type {number} */ (instruction[14]);\n\n          var pathLength = lineStringLength(pixelCoordinates, begin, end, 2);\n          var textLength = measure(text);\n          if (overflow || textLength <= pathLength) {\n            /** @type {import(\"./TextReplay.js\").default} */\n            var textReplay = /** @type {?} */ (this);\n            var textAlign = textReplay.textStates[textKey].textAlign;\n            var startM = (pathLength - textLength) * TEXT_ALIGN[textAlign];\n            var parts = drawTextOnPath(\n              pixelCoordinates, begin, end, 2, text, measure, startM, maxAngle);\n            if (parts) {\n              var c = (void 0), cc = (void 0), chars = (void 0), label = (void 0), part = (void 0);\n              if (strokeKey) {\n                for (c = 0, cc = parts.length; c < cc; ++c) {\n                  part = parts[c]; // x, y, anchorX, rotation, chunk\n                  chars = /** @type {string} */ (part[4]);\n                  label = textReplay.getImage(chars, textKey, '', strokeKey);\n                  anchorX = /** @type {number} */ (part[2]) + strokeWidth;\n                  anchorY = baseline * label.height + (0.5 - baseline) * 2 * strokeWidth - offsetY;\n                  this.replayImage_(context,\n                    /** @type {number} */ (part[0]), /** @type {number} */ (part[1]), label,\n                    anchorX, anchorY, declutterGroup, label.height, 1, 0, 0,\n                    /** @type {number} */ (part[3]), textScale, false, label.width,\n                    defaultPadding, null, null);\n                }\n              }\n              if (fillKey) {\n                for (c = 0, cc = parts.length; c < cc; ++c) {\n                  part = parts[c]; // x, y, anchorX, rotation, chunk\n                  chars = /** @type {string} */ (part[4]);\n                  label = textReplay.getImage(chars, textKey, fillKey, '');\n                  anchorX = /** @type {number} */ (part[2]);\n                  anchorY = baseline * label.height - offsetY;\n                  this.replayImage_(context,\n                    /** @type {number} */ (part[0]), /** @type {number} */ (part[1]), label,\n                    anchorX, anchorY, declutterGroup, label.height, 1, 0, 0,\n                    /** @type {number} */ (part[3]), textScale, false, label.width,\n                    defaultPadding, null, null);\n                }\n              }\n            }\n          }\n          this.renderDeclutter_(declutterGroup, feature);\n          ++i;\n          break;\n        case CanvasInstruction.END_GEOMETRY:\n          if (featureCallback !== undefined) {\n            feature = /** @type {import(\"../../Feature.js\").default|import(\"../Feature.js\").default} */ (instruction[1]);\n            var result = featureCallback(feature);\n            if (result) {\n              return result;\n            }\n          }\n          ++i;\n          break;\n        case CanvasInstruction.FILL:\n          if (batchSize) {\n            pendingFill++;\n          } else {\n            this.fill_(context);\n          }\n          ++i;\n          break;\n        case CanvasInstruction.MOVE_TO_LINE_TO:\n          d = /** @type {number} */ (instruction[1]);\n          dd = /** @type {number} */ (instruction[2]);\n          x = pixelCoordinates[d];\n          y = pixelCoordinates[d + 1];\n          roundX = (x + 0.5) | 0;\n          roundY = (y + 0.5) | 0;\n          if (roundX !== prevX || roundY !== prevY) {\n            context.moveTo(x, y);\n            prevX = roundX;\n            prevY = roundY;\n          }\n          for (d += 2; d < dd; d += 2) {\n            x = pixelCoordinates[d];\n            y = pixelCoordinates[d + 1];\n            roundX = (x + 0.5) | 0;\n            roundY = (y + 0.5) | 0;\n            if (d == dd - 2 || roundX !== prevX || roundY !== prevY) {\n              context.lineTo(x, y);\n              prevX = roundX;\n              prevY = roundY;\n            }\n          }\n          ++i;\n          break;\n        case CanvasInstruction.SET_FILL_STYLE:\n          lastFillInstruction = instruction;\n          this.alignFill_ = instruction[2];\n\n          if (pendingFill) {\n            this.fill_(context);\n            pendingFill = 0;\n            if (pendingStroke) {\n              context.stroke();\n              pendingStroke = 0;\n            }\n          }\n\n          context.fillStyle = /** @type {import(\"../../colorlike.js\").ColorLike} */ (instruction[1]);\n          ++i;\n          break;\n        case CanvasInstruction.SET_STROKE_STYLE:\n          lastStrokeInstruction = instruction;\n          if (pendingStroke) {\n            context.stroke();\n            pendingStroke = 0;\n          }\n          this.setStrokeStyle_(context, /** @type {Array<*>} */ (instruction));\n          ++i;\n          break;\n        case CanvasInstruction.STROKE:\n          if (batchSize) {\n            pendingStroke++;\n          } else {\n            context.stroke();\n          }\n          ++i;\n          break;\n        default:\n          ++i; // consume the instruction anyway, to avoid an infinite loop\n          break;\n      }\n    }\n    if (pendingFill) {\n      this.fill_(context);\n    }\n    if (pendingStroke) {\n      context.stroke();\n    }\n    return undefined;\n  };\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../transform.js\").Transform} transform Transform.\n   * @param {number} viewRotation View rotation.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features\n   *     to skip.\n   * @param {boolean} snapToPixel Snap point symbols and text to integer pixels.\n   */\n  CanvasReplay.prototype.replay = function replay (context, transform, viewRotation, skippedFeaturesHash, snapToPixel) {\n    this.viewRotation_ = viewRotation;\n    this.replay_(context, transform,\n      skippedFeaturesHash, this.instructions, snapToPixel, undefined, undefined);\n  };\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../transform.js\").Transform} transform Transform.\n   * @param {number} viewRotation View rotation.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features\n   *     to skip.\n   * @param {function((import(\"../../Feature.js\").default|import(\"../Feature.js\").default)): T=} opt_featureCallback\n   *     Feature callback.\n   * @param {import(\"../../extent.js\").Extent=} opt_hitExtent Only check features that intersect this\n   *     extent.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  CanvasReplay.prototype.replayHitDetection = function replayHitDetection (\n    context,\n    transform,\n    viewRotation,\n    skippedFeaturesHash,\n    opt_featureCallback,\n    opt_hitExtent\n  ) {\n    this.viewRotation_ = viewRotation;\n    return this.replay_(context, transform, skippedFeaturesHash,\n      this.hitDetectionInstructions, true, opt_featureCallback, opt_hitExtent);\n  };\n\n  /**\n   * Reverse the hit detection instructions.\n   */\n  CanvasReplay.prototype.reverseHitDetectionInstructions = function reverseHitDetectionInstructions () {\n    var hitDetectionInstructions = this.hitDetectionInstructions;\n    // step 1 - reverse array\n    hitDetectionInstructions.reverse();\n    // step 2 - reverse instructions within geometry blocks\n    var i;\n    var n = hitDetectionInstructions.length;\n    var instruction;\n    var type;\n    var begin = -1;\n    for (i = 0; i < n; ++i) {\n      instruction = hitDetectionInstructions[i];\n      type = /** @type {CanvasInstruction} */ (instruction[0]);\n      if (type == CanvasInstruction.END_GEOMETRY) {\n        begin = i;\n      } else if (type == CanvasInstruction.BEGIN_GEOMETRY) {\n        instruction[2] = i;\n        reverseSubArray(this.hitDetectionInstructions, begin, i);\n        begin = -1;\n      }\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasReplay.prototype.setFillStrokeStyle = function setFillStrokeStyle (fillStyle, strokeStyle) {\n    var state = this.state;\n    if (fillStyle) {\n      var fillStyleColor = fillStyle.getColor();\n      state.fillStyle = asColorLike(fillStyleColor ?\n        fillStyleColor : defaultFillStyle);\n    } else {\n      state.fillStyle = undefined;\n    }\n    if (strokeStyle) {\n      var strokeStyleColor = strokeStyle.getColor();\n      state.strokeStyle = asColorLike(strokeStyleColor ?\n        strokeStyleColor : defaultStrokeStyle);\n      var strokeStyleLineCap = strokeStyle.getLineCap();\n      state.lineCap = strokeStyleLineCap !== undefined ?\n        strokeStyleLineCap : defaultLineCap;\n      var strokeStyleLineDash = strokeStyle.getLineDash();\n      state.lineDash = strokeStyleLineDash ?\n        strokeStyleLineDash.slice() : defaultLineDash;\n      var strokeStyleLineDashOffset = strokeStyle.getLineDashOffset();\n      state.lineDashOffset = strokeStyleLineDashOffset ?\n        strokeStyleLineDashOffset : defaultLineDashOffset;\n      var strokeStyleLineJoin = strokeStyle.getLineJoin();\n      state.lineJoin = strokeStyleLineJoin !== undefined ?\n        strokeStyleLineJoin : defaultLineJoin;\n      var strokeStyleWidth = strokeStyle.getWidth();\n      state.lineWidth = strokeStyleWidth !== undefined ?\n        strokeStyleWidth : defaultLineWidth;\n      var strokeStyleMiterLimit = strokeStyle.getMiterLimit();\n      state.miterLimit = strokeStyleMiterLimit !== undefined ?\n        strokeStyleMiterLimit : defaultMiterLimit;\n\n      if (state.lineWidth > this.maxLineWidth) {\n        this.maxLineWidth = state.lineWidth;\n        // invalidate the buffered max extent cache\n        this.bufferedMaxExtent_ = null;\n      }\n    } else {\n      state.strokeStyle = undefined;\n      state.lineCap = undefined;\n      state.lineDash = null;\n      state.lineDashOffset = undefined;\n      state.lineJoin = undefined;\n      state.lineWidth = undefined;\n      state.miterLimit = undefined;\n    }\n  };\n\n  /**\n   * @param {import(\"../canvas.js\").FillStrokeState} state State.\n   * @param {import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default} geometry Geometry.\n   * @return {Array<*>} Fill instruction.\n   */\n  CanvasReplay.prototype.createFill = function createFill (state, geometry) {\n    var fillStyle = state.fillStyle;\n    /** @type {Array<*>} */\n    var fillInstruction = [CanvasInstruction.SET_FILL_STYLE, fillStyle];\n    if (typeof fillStyle !== 'string') {\n      // Fill is a pattern or gradient - align it!\n      fillInstruction.push(true);\n    }\n    return fillInstruction;\n  };\n\n  /**\n   * @param {import(\"../canvas.js\").FillStrokeState} state State.\n   */\n  CanvasReplay.prototype.applyStroke = function applyStroke (state) {\n    this.instructions.push(this.createStroke(state));\n  };\n\n  /**\n   * @param {import(\"../canvas.js\").FillStrokeState} state State.\n   * @return {Array<*>} Stroke instruction.\n   */\n  CanvasReplay.prototype.createStroke = function createStroke (state) {\n    return [\n      CanvasInstruction.SET_STROKE_STYLE,\n      state.strokeStyle, state.lineWidth * this.pixelRatio, state.lineCap,\n      state.lineJoin, state.miterLimit,\n      this.applyPixelRatio(state.lineDash), state.lineDashOffset * this.pixelRatio\n    ];\n  };\n\n  /**\n   * @param {import(\"../canvas.js\").FillStrokeState} state State.\n   * @param {function(this:CanvasReplay, import(\"../canvas.js\").FillStrokeState, (import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default)):Array<*>} createFill Create fill.\n   * @param {import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default} geometry Geometry.\n   */\n  CanvasReplay.prototype.updateFillStyle = function updateFillStyle (state, createFill, geometry) {\n    var fillStyle = state.fillStyle;\n    if (typeof fillStyle !== 'string' || state.currentFillStyle != fillStyle) {\n      if (fillStyle !== undefined) {\n        this.instructions.push(createFill.call(this, state, geometry));\n      }\n      state.currentFillStyle = fillStyle;\n    }\n  };\n\n  /**\n   * @param {import(\"../canvas.js\").FillStrokeState} state State.\n   * @param {function(this:CanvasReplay, import(\"../canvas.js\").FillStrokeState)} applyStroke Apply stroke.\n   */\n  CanvasReplay.prototype.updateStrokeStyle = function updateStrokeStyle (state, applyStroke) {\n    var strokeStyle = state.strokeStyle;\n    var lineCap = state.lineCap;\n    var lineDash = state.lineDash;\n    var lineDashOffset = state.lineDashOffset;\n    var lineJoin = state.lineJoin;\n    var lineWidth = state.lineWidth;\n    var miterLimit = state.miterLimit;\n    if (state.currentStrokeStyle != strokeStyle ||\n        state.currentLineCap != lineCap ||\n        (lineDash != state.currentLineDash && !equals(state.currentLineDash, lineDash)) ||\n        state.currentLineDashOffset != lineDashOffset ||\n        state.currentLineJoin != lineJoin ||\n        state.currentLineWidth != lineWidth ||\n        state.currentMiterLimit != miterLimit) {\n      if (strokeStyle !== undefined) {\n        applyStroke.call(this, state);\n      }\n      state.currentStrokeStyle = strokeStyle;\n      state.currentLineCap = lineCap;\n      state.currentLineDash = lineDash;\n      state.currentLineDashOffset = lineDashOffset;\n      state.currentLineJoin = lineJoin;\n      state.currentLineWidth = lineWidth;\n      state.currentMiterLimit = miterLimit;\n    }\n  };\n\n  /**\n   * @param {import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default} geometry Geometry.\n   * @param {import(\"../../Feature.js\").default|import(\"../Feature.js\").default} feature Feature.\n   */\n  CanvasReplay.prototype.endGeometry = function endGeometry (geometry, feature) {\n    this.beginGeometryInstruction1_[2] = this.instructions.length;\n    this.beginGeometryInstruction1_ = null;\n    this.beginGeometryInstruction2_[2] = this.hitDetectionInstructions.length;\n    this.beginGeometryInstruction2_ = null;\n    var endGeometryInstruction = [CanvasInstruction.END_GEOMETRY, feature];\n    this.instructions.push(endGeometryInstruction);\n    this.hitDetectionInstructions.push(endGeometryInstruction);\n  };\n\n  /**\n   * Get the buffered rendering extent.  Rendering will be clipped to the extent\n   * provided to the constructor.  To account for symbolizers that may intersect\n   * this extent, we calculate a buffered extent (e.g. based on stroke width).\n   * @return {import(\"../../extent.js\").Extent} The buffered rendering extent.\n   * @protected\n   */\n  CanvasReplay.prototype.getBufferedMaxExtent = function getBufferedMaxExtent () {\n    if (!this.bufferedMaxExtent_) {\n      this.bufferedMaxExtent_ = clone(this.maxExtent);\n      if (this.maxLineWidth > 0) {\n        var width = this.resolution * (this.maxLineWidth + 1) / 2;\n        buffer(this.bufferedMaxExtent_, width, this.bufferedMaxExtent_);\n      }\n    }\n    return this.bufferedMaxExtent_;\n  };\n\n  return CanvasReplay;\n}(VectorContext));\n\n\nexport default CanvasReplay;\n\n//# sourceMappingURL=Replay.js.map","/**\n * @module ol/render/canvas/ImageReplay\n */\nimport CanvasInstruction from './Instruction.js';\nimport CanvasReplay from './Replay.js';\n\nvar CanvasImageReplay = /*@__PURE__*/(function (CanvasReplay) {\n  function CanvasImageReplay(tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree) {\n    CanvasReplay.call(this, tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree);\n\n    /**\n     * @private\n     * @type {import(\"../canvas.js\").DeclutterGroup}\n     */\n    this.declutterGroup_ = null;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement}\n     */\n    this.hitDetectionImage_ = null;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement}\n     */\n    this.image_ = null;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.anchorX_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.anchorY_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.height_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.opacity_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.originX_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.originY_ = undefined;\n\n    /**\n     * @private\n     * @type {boolean|undefined}\n     */\n    this.rotateWithView_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.rotation_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.scale_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.width_ = undefined;\n\n  }\n\n  if ( CanvasReplay ) CanvasImageReplay.__proto__ = CanvasReplay;\n  CanvasImageReplay.prototype = Object.create( CanvasReplay && CanvasReplay.prototype );\n  CanvasImageReplay.prototype.constructor = CanvasImageReplay;\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @private\n   * @return {number} My end.\n   */\n  CanvasImageReplay.prototype.drawCoordinates_ = function drawCoordinates_ (flatCoordinates, offset, end, stride) {\n    return this.appendFlatCoordinates(flatCoordinates, offset, end, stride, false, false);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasImageReplay.prototype.drawPoint = function drawPoint (pointGeometry, feature) {\n    if (!this.image_) {\n      return;\n    }\n    this.beginGeometry(pointGeometry, feature);\n    var flatCoordinates = pointGeometry.getFlatCoordinates();\n    var stride = pointGeometry.getStride();\n    var myBegin = this.coordinates.length;\n    var myEnd = this.drawCoordinates_(flatCoordinates, 0, flatCoordinates.length, stride);\n    this.instructions.push([\n      CanvasInstruction.DRAW_IMAGE, myBegin, myEnd, this.image_,\n      // Remaining arguments to DRAW_IMAGE are in alphabetical order\n      this.anchorX_, this.anchorY_, this.declutterGroup_, this.height_, this.opacity_,\n      this.originX_, this.originY_, this.rotateWithView_, this.rotation_,\n      this.scale_ * this.pixelRatio, this.width_\n    ]);\n    this.hitDetectionInstructions.push([\n      CanvasInstruction.DRAW_IMAGE, myBegin, myEnd, this.hitDetectionImage_,\n      // Remaining arguments to DRAW_IMAGE are in alphabetical order\n      this.anchorX_, this.anchorY_, this.declutterGroup_, this.height_, this.opacity_,\n      this.originX_, this.originY_, this.rotateWithView_, this.rotation_,\n      this.scale_, this.width_\n    ]);\n    this.endGeometry(pointGeometry, feature);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasImageReplay.prototype.drawMultiPoint = function drawMultiPoint (multiPointGeometry, feature) {\n    if (!this.image_) {\n      return;\n    }\n    this.beginGeometry(multiPointGeometry, feature);\n    var flatCoordinates = multiPointGeometry.getFlatCoordinates();\n    var stride = multiPointGeometry.getStride();\n    var myBegin = this.coordinates.length;\n    var myEnd = this.drawCoordinates_(\n      flatCoordinates, 0, flatCoordinates.length, stride);\n    this.instructions.push([\n      CanvasInstruction.DRAW_IMAGE, myBegin, myEnd, this.image_,\n      // Remaining arguments to DRAW_IMAGE are in alphabetical order\n      this.anchorX_, this.anchorY_, this.declutterGroup_, this.height_, this.opacity_,\n      this.originX_, this.originY_, this.rotateWithView_, this.rotation_,\n      this.scale_ * this.pixelRatio, this.width_\n    ]);\n    this.hitDetectionInstructions.push([\n      CanvasInstruction.DRAW_IMAGE, myBegin, myEnd, this.hitDetectionImage_,\n      // Remaining arguments to DRAW_IMAGE are in alphabetical order\n      this.anchorX_, this.anchorY_, this.declutterGroup_, this.height_, this.opacity_,\n      this.originX_, this.originY_, this.rotateWithView_, this.rotation_,\n      this.scale_, this.width_\n    ]);\n    this.endGeometry(multiPointGeometry, feature);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasImageReplay.prototype.finish = function finish () {\n    this.reverseHitDetectionInstructions();\n    // FIXME this doesn't really protect us against further calls to draw*Geometry\n    this.anchorX_ = undefined;\n    this.anchorY_ = undefined;\n    this.hitDetectionImage_ = null;\n    this.image_ = null;\n    this.height_ = undefined;\n    this.scale_ = undefined;\n    this.opacity_ = undefined;\n    this.originX_ = undefined;\n    this.originY_ = undefined;\n    this.rotateWithView_ = undefined;\n    this.rotation_ = undefined;\n    this.width_ = undefined;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasImageReplay.prototype.setImageStyle = function setImageStyle (imageStyle, declutterGroup) {\n    var anchor = imageStyle.getAnchor();\n    var size = imageStyle.getSize();\n    var hitDetectionImage = imageStyle.getHitDetectionImage(1);\n    var image = imageStyle.getImage(1);\n    var origin = imageStyle.getOrigin();\n    this.anchorX_ = anchor[0];\n    this.anchorY_ = anchor[1];\n    this.declutterGroup_ = /** @type {import(\"../canvas.js\").DeclutterGroup} */ (declutterGroup);\n    this.hitDetectionImage_ = hitDetectionImage;\n    this.image_ = image;\n    this.height_ = size[1];\n    this.opacity_ = imageStyle.getOpacity();\n    this.originX_ = origin[0];\n    this.originY_ = origin[1];\n    this.rotateWithView_ = imageStyle.getRotateWithView();\n    this.rotation_ = imageStyle.getRotation();\n    this.scale_ = imageStyle.getScale();\n    this.width_ = size[0];\n  };\n\n  return CanvasImageReplay;\n}(CanvasReplay));\n\n\nexport default CanvasImageReplay;\n\n//# sourceMappingURL=ImageReplay.js.map","/**\n * @module ol/render/canvas/LineStringReplay\n */\nimport CanvasInstruction, {strokeInstruction, beginPathInstruction} from './Instruction.js';\nimport CanvasReplay from './Replay.js';\n\nvar CanvasLineStringReplay = /*@__PURE__*/(function (CanvasReplay) {\n  function CanvasLineStringReplay(tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree) {\n    CanvasReplay.call(this, tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree);\n  }\n\n  if ( CanvasReplay ) CanvasLineStringReplay.__proto__ = CanvasReplay;\n  CanvasLineStringReplay.prototype = Object.create( CanvasReplay && CanvasReplay.prototype );\n  CanvasLineStringReplay.prototype.constructor = CanvasLineStringReplay;\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @private\n   * @return {number} end.\n   */\n  CanvasLineStringReplay.prototype.drawFlatCoordinates_ = function drawFlatCoordinates_ (flatCoordinates, offset, end, stride) {\n    var myBegin = this.coordinates.length;\n    var myEnd = this.appendFlatCoordinates(\n      flatCoordinates, offset, end, stride, false, false);\n    var moveToLineToInstruction = [CanvasInstruction.MOVE_TO_LINE_TO, myBegin, myEnd];\n    this.instructions.push(moveToLineToInstruction);\n    this.hitDetectionInstructions.push(moveToLineToInstruction);\n    return end;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasLineStringReplay.prototype.drawLineString = function drawLineString (lineStringGeometry, feature) {\n    var state = this.state;\n    var strokeStyle = state.strokeStyle;\n    var lineWidth = state.lineWidth;\n    if (strokeStyle === undefined || lineWidth === undefined) {\n      return;\n    }\n    this.updateStrokeStyle(state, this.applyStroke);\n    this.beginGeometry(lineStringGeometry, feature);\n    this.hitDetectionInstructions.push([\n      CanvasInstruction.SET_STROKE_STYLE,\n      state.strokeStyle, state.lineWidth, state.lineCap, state.lineJoin,\n      state.miterLimit, state.lineDash, state.lineDashOffset\n    ], beginPathInstruction);\n    var flatCoordinates = lineStringGeometry.getFlatCoordinates();\n    var stride = lineStringGeometry.getStride();\n    this.drawFlatCoordinates_(flatCoordinates, 0, flatCoordinates.length, stride);\n    this.hitDetectionInstructions.push(strokeInstruction);\n    this.endGeometry(lineStringGeometry, feature);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasLineStringReplay.prototype.drawMultiLineString = function drawMultiLineString (multiLineStringGeometry, feature) {\n    var state = this.state;\n    var strokeStyle = state.strokeStyle;\n    var lineWidth = state.lineWidth;\n    if (strokeStyle === undefined || lineWidth === undefined) {\n      return;\n    }\n    this.updateStrokeStyle(state, this.applyStroke);\n    this.beginGeometry(multiLineStringGeometry, feature);\n    this.hitDetectionInstructions.push([\n      CanvasInstruction.SET_STROKE_STYLE,\n      state.strokeStyle, state.lineWidth, state.lineCap, state.lineJoin,\n      state.miterLimit, state.lineDash, state.lineDashOffset\n    ], beginPathInstruction);\n    var ends = multiLineStringGeometry.getEnds();\n    var flatCoordinates = multiLineStringGeometry.getFlatCoordinates();\n    var stride = multiLineStringGeometry.getStride();\n    var offset = 0;\n    for (var i = 0, ii = ends.length; i < ii; ++i) {\n      offset = this.drawFlatCoordinates_(flatCoordinates, offset, ends[i], stride);\n    }\n    this.hitDetectionInstructions.push(strokeInstruction);\n    this.endGeometry(multiLineStringGeometry, feature);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasLineStringReplay.prototype.finish = function finish () {\n    var state = this.state;\n    if (state.lastStroke != undefined && state.lastStroke != this.coordinates.length) {\n      this.instructions.push(strokeInstruction);\n    }\n    this.reverseHitDetectionInstructions();\n    this.state = null;\n  };\n\n  /**\n   * @inheritDoc.\n   */\n  CanvasLineStringReplay.prototype.applyStroke = function applyStroke (state) {\n    if (state.lastStroke != undefined && state.lastStroke != this.coordinates.length) {\n      this.instructions.push(strokeInstruction);\n      state.lastStroke = this.coordinates.length;\n    }\n    state.lastStroke = 0;\n    CanvasReplay.prototype.applyStroke.call(this, state);\n    this.instructions.push(beginPathInstruction);\n  };\n\n  return CanvasLineStringReplay;\n}(CanvasReplay));\n\n\nexport default CanvasLineStringReplay;\n\n//# sourceMappingURL=LineStringReplay.js.map","/**\n * @module ol/render/canvas/PolygonReplay\n */\nimport {asString} from '../../color.js';\nimport {snap} from '../../geom/flat/simplify.js';\nimport {defaultFillStyle} from '../canvas.js';\nimport CanvasInstruction, {\n  fillInstruction, strokeInstruction, beginPathInstruction, closePathInstruction\n} from './Instruction.js';\nimport CanvasReplay from './Replay.js';\n\n\nvar CanvasPolygonReplay = /*@__PURE__*/(function (CanvasReplay) {\n  function CanvasPolygonReplay(tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree) {\n    CanvasReplay.call(this, tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree);\n  }\n\n  if ( CanvasReplay ) CanvasPolygonReplay.__proto__ = CanvasReplay;\n  CanvasPolygonReplay.prototype = Object.create( CanvasReplay && CanvasReplay.prototype );\n  CanvasPolygonReplay.prototype.constructor = CanvasPolygonReplay;\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {Array<number>} ends Ends.\n   * @param {number} stride Stride.\n   * @private\n   * @return {number} End.\n   */\n  CanvasPolygonReplay.prototype.drawFlatCoordinatess_ = function drawFlatCoordinatess_ (flatCoordinates, offset, ends, stride) {\n    var state = this.state;\n    var fill = state.fillStyle !== undefined;\n    var stroke = state.strokeStyle != undefined;\n    var numEnds = ends.length;\n    this.instructions.push(beginPathInstruction);\n    this.hitDetectionInstructions.push(beginPathInstruction);\n    for (var i = 0; i < numEnds; ++i) {\n      var end = ends[i];\n      var myBegin = this.coordinates.length;\n      var myEnd = this.appendFlatCoordinates(flatCoordinates, offset, end, stride, true, !stroke);\n      var moveToLineToInstruction = [CanvasInstruction.MOVE_TO_LINE_TO, myBegin, myEnd];\n      this.instructions.push(moveToLineToInstruction);\n      this.hitDetectionInstructions.push(moveToLineToInstruction);\n      if (stroke) {\n        // Performance optimization: only call closePath() when we have a stroke.\n        // Otherwise the ring is closed already (see appendFlatCoordinates above).\n        this.instructions.push(closePathInstruction);\n        this.hitDetectionInstructions.push(closePathInstruction);\n      }\n      offset = end;\n    }\n    if (fill) {\n      this.instructions.push(fillInstruction);\n      this.hitDetectionInstructions.push(fillInstruction);\n    }\n    if (stroke) {\n      this.instructions.push(strokeInstruction);\n      this.hitDetectionInstructions.push(strokeInstruction);\n    }\n    return offset;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasPolygonReplay.prototype.drawCircle = function drawCircle (circleGeometry, feature) {\n    var state = this.state;\n    var fillStyle = state.fillStyle;\n    var strokeStyle = state.strokeStyle;\n    if (fillStyle === undefined && strokeStyle === undefined) {\n      return;\n    }\n    this.setFillStrokeStyles_(circleGeometry);\n    this.beginGeometry(circleGeometry, feature);\n    if (state.fillStyle !== undefined) {\n      this.hitDetectionInstructions.push([\n        CanvasInstruction.SET_FILL_STYLE,\n        asString(defaultFillStyle)\n      ]);\n    }\n    if (state.strokeStyle !== undefined) {\n      this.hitDetectionInstructions.push([\n        CanvasInstruction.SET_STROKE_STYLE,\n        state.strokeStyle, state.lineWidth, state.lineCap, state.lineJoin,\n        state.miterLimit, state.lineDash, state.lineDashOffset\n      ]);\n    }\n    var flatCoordinates = circleGeometry.getFlatCoordinates();\n    var stride = circleGeometry.getStride();\n    var myBegin = this.coordinates.length;\n    this.appendFlatCoordinates(\n      flatCoordinates, 0, flatCoordinates.length, stride, false, false);\n    var circleInstruction = [CanvasInstruction.CIRCLE, myBegin];\n    this.instructions.push(beginPathInstruction, circleInstruction);\n    this.hitDetectionInstructions.push(beginPathInstruction, circleInstruction);\n    this.hitDetectionInstructions.push(fillInstruction);\n    if (state.fillStyle !== undefined) {\n      this.instructions.push(fillInstruction);\n    }\n    if (state.strokeStyle !== undefined) {\n      this.instructions.push(strokeInstruction);\n      this.hitDetectionInstructions.push(strokeInstruction);\n    }\n    this.endGeometry(circleGeometry, feature);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasPolygonReplay.prototype.drawPolygon = function drawPolygon (polygonGeometry, feature) {\n    var state = this.state;\n    var fillStyle = state.fillStyle;\n    var strokeStyle = state.strokeStyle;\n    if (fillStyle === undefined && strokeStyle === undefined) {\n      return;\n    }\n    this.setFillStrokeStyles_(polygonGeometry);\n    this.beginGeometry(polygonGeometry, feature);\n    if (state.fillStyle !== undefined) {\n      this.hitDetectionInstructions.push([\n        CanvasInstruction.SET_FILL_STYLE,\n        asString(defaultFillStyle)\n      ]);\n    }\n    if (state.strokeStyle !== undefined) {\n      this.hitDetectionInstructions.push([\n        CanvasInstruction.SET_STROKE_STYLE,\n        state.strokeStyle, state.lineWidth, state.lineCap, state.lineJoin,\n        state.miterLimit, state.lineDash, state.lineDashOffset\n      ]);\n    }\n    var ends = polygonGeometry.getEnds();\n    var flatCoordinates = polygonGeometry.getOrientedFlatCoordinates();\n    var stride = polygonGeometry.getStride();\n    this.drawFlatCoordinatess_(flatCoordinates, 0, ends, stride);\n    this.endGeometry(polygonGeometry, feature);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasPolygonReplay.prototype.drawMultiPolygon = function drawMultiPolygon (multiPolygonGeometry, feature) {\n    var state = this.state;\n    var fillStyle = state.fillStyle;\n    var strokeStyle = state.strokeStyle;\n    if (fillStyle === undefined && strokeStyle === undefined) {\n      return;\n    }\n    this.setFillStrokeStyles_(multiPolygonGeometry);\n    this.beginGeometry(multiPolygonGeometry, feature);\n    if (state.fillStyle !== undefined) {\n      this.hitDetectionInstructions.push([\n        CanvasInstruction.SET_FILL_STYLE,\n        asString(defaultFillStyle)\n      ]);\n    }\n    if (state.strokeStyle !== undefined) {\n      this.hitDetectionInstructions.push([\n        CanvasInstruction.SET_STROKE_STYLE,\n        state.strokeStyle, state.lineWidth, state.lineCap, state.lineJoin,\n        state.miterLimit, state.lineDash, state.lineDashOffset\n      ]);\n    }\n    var endss = multiPolygonGeometry.getEndss();\n    var flatCoordinates = multiPolygonGeometry.getOrientedFlatCoordinates();\n    var stride = multiPolygonGeometry.getStride();\n    var offset = 0;\n    for (var i = 0, ii = endss.length; i < ii; ++i) {\n      offset = this.drawFlatCoordinatess_(flatCoordinates, offset, endss[i], stride);\n    }\n    this.endGeometry(multiPolygonGeometry, feature);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasPolygonReplay.prototype.finish = function finish () {\n    this.reverseHitDetectionInstructions();\n    this.state = null;\n    // We want to preserve topology when drawing polygons.  Polygons are\n    // simplified using quantization and point elimination. However, we might\n    // have received a mix of quantized and non-quantized geometries, so ensure\n    // that all are quantized by quantizing all coordinates in the batch.\n    var tolerance = this.tolerance;\n    if (tolerance !== 0) {\n      var coordinates = this.coordinates;\n      for (var i = 0, ii = coordinates.length; i < ii; ++i) {\n        coordinates[i] = snap(coordinates[i], tolerance);\n      }\n    }\n  };\n\n  /**\n   * @private\n   * @param {import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default} geometry Geometry.\n   */\n  CanvasPolygonReplay.prototype.setFillStrokeStyles_ = function setFillStrokeStyles_ (geometry) {\n    var state = this.state;\n    var fillStyle = state.fillStyle;\n    if (fillStyle !== undefined) {\n      this.updateFillStyle(state, this.createFill, geometry);\n    }\n    if (state.strokeStyle !== undefined) {\n      this.updateStrokeStyle(state, this.applyStroke);\n    }\n  };\n\n  return CanvasPolygonReplay;\n}(CanvasReplay));\n\n\nexport default CanvasPolygonReplay;\n\n//# sourceMappingURL=PolygonReplay.js.map","/**\n * @module ol/geom/flat/straightchunk\n */\n\n\n/**\n * @param {number} maxAngle Maximum acceptable angle delta between segments.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {Array<number>} Start and end of the first suitable chunk of the\n * given `flatCoordinates`.\n */\nexport function matchingChunk(maxAngle, flatCoordinates, offset, end, stride) {\n  var chunkStart = offset;\n  var chunkEnd = offset;\n  var chunkM = 0;\n  var m = 0;\n  var start = offset;\n  var acos, i, m12, m23, x1, y1, x12, y12, x23, y23;\n  for (i = offset; i < end; i += stride) {\n    var x2 = flatCoordinates[i];\n    var y2 = flatCoordinates[i + 1];\n    if (x1 !== undefined) {\n      x23 = x2 - x1;\n      y23 = y2 - y1;\n      m23 = Math.sqrt(x23 * x23 + y23 * y23);\n      if (x12 !== undefined) {\n        m += m12;\n        acos = Math.acos((x12 * x23 + y12 * y23) / (m12 * m23));\n        if (acos > maxAngle) {\n          if (m > chunkM) {\n            chunkM = m;\n            chunkStart = start;\n            chunkEnd = i;\n          }\n          m = 0;\n          start = i - stride;\n        }\n      }\n      m12 = m23;\n      x12 = x23;\n      y12 = y23;\n    }\n    x1 = x2;\n    y1 = y2;\n  }\n  m += m23;\n  return m > chunkM ? [start, i] : [chunkStart, chunkEnd];\n}\n\n//# sourceMappingURL=straightchunk.js.map","/**\n * @module ol/style/TextPlacement\n */\n\n/**\n * Text placement. One of `'point'`, `'line'`. Default is `'point'`. Note that\n * `'line'` requires the underlying geometry to be a {@link module:ol/geom/LineString~LineString},\n * {@link module:ol/geom/Polygon~Polygon}, {@link module:ol/geom/MultiLineString~MultiLineString} or\n * {@link module:ol/geom/MultiPolygon~MultiPolygon}.\n * @enum {string}\n */\nexport default {\n  POINT: 'point',\n  LINE: 'line'\n};\n\n//# sourceMappingURL=TextPlacement.js.map","/**\n * @module ol/render/canvas/TextReplay\n */\nimport {getUid} from '../../util.js';\nimport {asColorLike} from '../../colorlike.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {intersects} from '../../extent.js';\nimport {matchingChunk} from '../../geom/flat/straightchunk.js';\nimport GeometryType from '../../geom/GeometryType.js';\nimport {CANVAS_LINE_DASH} from '../../has.js';\nimport {labelCache, measureTextWidth, defaultTextAlign, measureTextHeight, defaultPadding, defaultLineCap, defaultLineDashOffset, defaultLineDash, defaultLineJoin, defaultFillStyle, checkFont, defaultFont, defaultLineWidth, defaultMiterLimit, defaultStrokeStyle, defaultTextBaseline} from '../canvas.js';\nimport CanvasInstruction from './Instruction.js';\nimport CanvasReplay from './Replay.js';\nimport {TEXT_ALIGN} from '../replay.js';\nimport TextPlacement from '../../style/TextPlacement.js';\n\nvar CanvasTextReplay = /*@__PURE__*/(function (CanvasReplay) {\n  function CanvasTextReplay(tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree) {\n    CanvasReplay.call(this, tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree);\n\n    /**\n     * @private\n     * @type {import(\"../canvas.js\").DeclutterGroup}\n     */\n    this.declutterGroup_;\n\n    /**\n     * @private\n     * @type {Array<HTMLCanvasElement>}\n     */\n    this.labels_ = null;\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.text_ = '';\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textOffsetX_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textOffsetY_ = 0;\n\n    /**\n     * @private\n     * @type {boolean|undefined}\n     */\n    this.textRotateWithView_ = undefined;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textRotation_ = 0;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").FillState}\n     */\n    this.textFillState_ = null;\n\n    /**\n     * @type {!Object<string, import(\"../canvas.js\").FillState>}\n     */\n    this.fillStates = {};\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").StrokeState}\n     */\n    this.textStrokeState_ = null;\n\n    /**\n     * @type {!Object<string, import(\"../canvas.js\").StrokeState>}\n     */\n    this.strokeStates = {};\n\n    /**\n     * @private\n     * @type {import(\"../canvas.js\").TextState}\n     */\n    this.textState_ = /** @type {import(\"../canvas.js\").TextState} */ ({});\n\n    /**\n     * @type {!Object<string, import(\"../canvas.js\").TextState>}\n     */\n    this.textStates = {};\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.textKey_ = '';\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.fillKey_ = '';\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.strokeKey_ = '';\n\n    /**\n     * @private\n     * @type {Object<string, Object<string, number>>}\n     */\n    this.widths_ = {};\n\n    labelCache.prune();\n\n  }\n\n  if ( CanvasReplay ) CanvasTextReplay.__proto__ = CanvasReplay;\n  CanvasTextReplay.prototype = Object.create( CanvasReplay && CanvasReplay.prototype );\n  CanvasTextReplay.prototype.constructor = CanvasTextReplay;\n\n  /**\n   * @inheritDoc\n   */\n  CanvasTextReplay.prototype.drawText = function drawText (geometry, feature) {\n    var fillState = this.textFillState_;\n    var strokeState = this.textStrokeState_;\n    var textState = this.textState_;\n    if (this.text_ === '' || !textState || (!fillState && !strokeState)) {\n      return;\n    }\n\n    var begin = this.coordinates.length;\n\n    var geometryType = geometry.getType();\n    var flatCoordinates = null;\n    var end = 2;\n    var stride = 2;\n    var i, ii;\n\n    if (textState.placement === TextPlacement.LINE) {\n      if (!intersects(this.getBufferedMaxExtent(), geometry.getExtent())) {\n        return;\n      }\n      var ends;\n      flatCoordinates = geometry.getFlatCoordinates();\n      stride = geometry.getStride();\n      if (geometryType == GeometryType.LINE_STRING) {\n        ends = [flatCoordinates.length];\n      } else if (geometryType == GeometryType.MULTI_LINE_STRING) {\n        ends = geometry.getEnds();\n      } else if (geometryType == GeometryType.POLYGON) {\n        ends = geometry.getEnds().slice(0, 1);\n      } else if (geometryType == GeometryType.MULTI_POLYGON) {\n        var endss = geometry.getEndss();\n        ends = [];\n        for (i = 0, ii = endss.length; i < ii; ++i) {\n          ends.push(endss[i][0]);\n        }\n      }\n      this.beginGeometry(geometry, feature);\n      var textAlign = textState.textAlign;\n      var flatOffset = 0;\n      var flatEnd;\n      for (var o = 0, oo = ends.length; o < oo; ++o) {\n        if (textAlign == undefined) {\n          var range = matchingChunk(textState.maxAngle, flatCoordinates, flatOffset, ends[o], stride);\n          flatOffset = range[0];\n          flatEnd = range[1];\n        } else {\n          flatEnd = ends[o];\n        }\n        for (i = flatOffset; i < flatEnd; i += stride) {\n          this.coordinates.push(flatCoordinates[i], flatCoordinates[i + 1]);\n        }\n        end = this.coordinates.length;\n        flatOffset = ends[o];\n        this.drawChars_(begin, end, this.declutterGroup_);\n        begin = end;\n      }\n      this.endGeometry(geometry, feature);\n\n    } else {\n      var label = this.getImage(this.text_, this.textKey_, this.fillKey_, this.strokeKey_);\n      var width = label.width / this.pixelRatio;\n      switch (geometryType) {\n        case GeometryType.POINT:\n        case GeometryType.MULTI_POINT:\n          flatCoordinates = geometry.getFlatCoordinates();\n          end = flatCoordinates.length;\n          break;\n        case GeometryType.LINE_STRING:\n          flatCoordinates = /** @type {import(\"../../geom/LineString.js\").default} */ (geometry).getFlatMidpoint();\n          break;\n        case GeometryType.CIRCLE:\n          flatCoordinates = /** @type {import(\"../../geom/Circle.js\").default} */ (geometry).getCenter();\n          break;\n        case GeometryType.MULTI_LINE_STRING:\n          flatCoordinates = /** @type {import(\"../../geom/MultiLineString.js\").default} */ (geometry).getFlatMidpoints();\n          end = flatCoordinates.length;\n          break;\n        case GeometryType.POLYGON:\n          flatCoordinates = /** @type {import(\"../../geom/Polygon.js\").default} */ (geometry).getFlatInteriorPoint();\n          if (!textState.overflow && flatCoordinates[2] / this.resolution < width) {\n            return;\n          }\n          stride = 3;\n          break;\n        case GeometryType.MULTI_POLYGON:\n          var interiorPoints = /** @type {import(\"../../geom/MultiPolygon.js\").default} */ (geometry).getFlatInteriorPoints();\n          flatCoordinates = [];\n          for (i = 0, ii = interiorPoints.length; i < ii; i += 3) {\n            if (textState.overflow || interiorPoints[i + 2] / this.resolution >= width) {\n              flatCoordinates.push(interiorPoints[i], interiorPoints[i + 1]);\n            }\n          }\n          end = flatCoordinates.length;\n          if (end == 0) {\n            return;\n          }\n          break;\n        default:\n      }\n      end = this.appendFlatCoordinates(flatCoordinates, 0, end, stride, false, false);\n      if (textState.backgroundFill || textState.backgroundStroke) {\n        this.setFillStrokeStyle(textState.backgroundFill, textState.backgroundStroke);\n        if (textState.backgroundFill) {\n          this.updateFillStyle(this.state, this.createFill, geometry);\n          this.hitDetectionInstructions.push(this.createFill(this.state, geometry));\n        }\n        if (textState.backgroundStroke) {\n          this.updateStrokeStyle(this.state, this.applyStroke);\n          this.hitDetectionInstructions.push(this.createStroke(this.state));\n        }\n      }\n      this.beginGeometry(geometry, feature);\n      this.drawTextImage_(label, begin, end);\n      this.endGeometry(geometry, feature);\n    }\n  };\n\n  /**\n   * @param {string} text Text.\n   * @param {string} textKey Text style key.\n   * @param {string} fillKey Fill style key.\n   * @param {string} strokeKey Stroke style key.\n   * @return {HTMLCanvasElement} Image.\n   */\n  CanvasTextReplay.prototype.getImage = function getImage (text, textKey, fillKey, strokeKey) {\n    var label;\n    var key = strokeKey + textKey + text + fillKey + this.pixelRatio;\n\n    if (!labelCache.containsKey(key)) {\n      var strokeState = strokeKey ? this.strokeStates[strokeKey] || this.textStrokeState_ : null;\n      var fillState = fillKey ? this.fillStates[fillKey] || this.textFillState_ : null;\n      var textState = this.textStates[textKey] || this.textState_;\n      var pixelRatio = this.pixelRatio;\n      var scale = textState.scale * pixelRatio;\n      var align = TEXT_ALIGN[textState.textAlign || defaultTextAlign];\n      var strokeWidth = strokeKey && strokeState.lineWidth ? strokeState.lineWidth : 0;\n\n      var lines = text.split('\\n');\n      var numLines = lines.length;\n      var widths = [];\n      var width = measureTextWidths(textState.font, lines, widths);\n      var lineHeight = measureTextHeight(textState.font);\n      var height = lineHeight * numLines;\n      var renderWidth = (width + strokeWidth);\n      var context = createCanvasContext2D(\n        Math.ceil(renderWidth * scale),\n        Math.ceil((height + strokeWidth) * scale));\n      label = context.canvas;\n      labelCache.set(key, label);\n      if (scale != 1) {\n        context.scale(scale, scale);\n      }\n      context.font = textState.font;\n      if (strokeKey) {\n        context.strokeStyle = strokeState.strokeStyle;\n        context.lineWidth = strokeWidth;\n        context.lineCap = /** @type {CanvasLineCap} */ (strokeState.lineCap);\n        context.lineJoin = /** @type {CanvasLineJoin} */ (strokeState.lineJoin);\n        context.miterLimit = strokeState.miterLimit;\n        if (CANVAS_LINE_DASH && strokeState.lineDash.length) {\n          context.setLineDash(strokeState.lineDash);\n          context.lineDashOffset = strokeState.lineDashOffset;\n        }\n      }\n      if (fillKey) {\n        context.fillStyle = fillState.fillStyle;\n      }\n      context.textBaseline = 'middle';\n      context.textAlign = 'center';\n      var leftRight = (0.5 - align);\n      var x = align * label.width / scale + leftRight * strokeWidth;\n      var i;\n      if (strokeKey) {\n        for (i = 0; i < numLines; ++i) {\n          context.strokeText(lines[i], x + leftRight * widths[i], 0.5 * (strokeWidth + lineHeight) + i * lineHeight);\n        }\n      }\n      if (fillKey) {\n        for (i = 0; i < numLines; ++i) {\n          context.fillText(lines[i], x + leftRight * widths[i], 0.5 * (strokeWidth + lineHeight) + i * lineHeight);\n        }\n      }\n    }\n    return labelCache.get(key);\n  };\n\n  /**\n   * @private\n   * @param {HTMLCanvasElement} label Label.\n   * @param {number} begin Begin.\n   * @param {number} end End.\n   */\n  CanvasTextReplay.prototype.drawTextImage_ = function drawTextImage_ (label, begin, end) {\n    var textState = this.textState_;\n    var strokeState = this.textStrokeState_;\n    var pixelRatio = this.pixelRatio;\n    var align = TEXT_ALIGN[textState.textAlign || defaultTextAlign];\n    var baseline = TEXT_ALIGN[textState.textBaseline];\n    var strokeWidth = strokeState && strokeState.lineWidth ? strokeState.lineWidth : 0;\n\n    var anchorX = align * label.width / pixelRatio + 2 * (0.5 - align) * strokeWidth;\n    var anchorY = baseline * label.height / pixelRatio + 2 * (0.5 - baseline) * strokeWidth;\n    this.instructions.push([CanvasInstruction.DRAW_IMAGE, begin, end,\n      label, (anchorX - this.textOffsetX_) * pixelRatio, (anchorY - this.textOffsetY_) * pixelRatio,\n      this.declutterGroup_, label.height, 1, 0, 0, this.textRotateWithView_, this.textRotation_,\n      1, label.width,\n      textState.padding == defaultPadding ?\n        defaultPadding : textState.padding.map(function(p) {\n          return p * pixelRatio;\n        }),\n      !!textState.backgroundFill, !!textState.backgroundStroke\n    ]);\n    this.hitDetectionInstructions.push([CanvasInstruction.DRAW_IMAGE, begin, end,\n      label, (anchorX - this.textOffsetX_) * pixelRatio, (anchorY - this.textOffsetY_) * pixelRatio,\n      this.declutterGroup_, label.height, 1, 0, 0, this.textRotateWithView_, this.textRotation_,\n      1 / pixelRatio, label.width, textState.padding,\n      !!textState.backgroundFill, !!textState.backgroundStroke\n    ]);\n  };\n\n  /**\n   * @private\n   * @param {number} begin Begin.\n   * @param {number} end End.\n   * @param {import(\"../canvas.js\").DeclutterGroup} declutterGroup Declutter group.\n   */\n  CanvasTextReplay.prototype.drawChars_ = function drawChars_ (begin, end, declutterGroup) {\n    var strokeState = this.textStrokeState_;\n    var textState = this.textState_;\n    var fillState = this.textFillState_;\n\n    var strokeKey = this.strokeKey_;\n    if (strokeState) {\n      if (!(strokeKey in this.strokeStates)) {\n        this.strokeStates[strokeKey] = /** @type {import(\"../canvas.js\").StrokeState} */ ({\n          strokeStyle: strokeState.strokeStyle,\n          lineCap: strokeState.lineCap,\n          lineDashOffset: strokeState.lineDashOffset,\n          lineWidth: strokeState.lineWidth,\n          lineJoin: strokeState.lineJoin,\n          miterLimit: strokeState.miterLimit,\n          lineDash: strokeState.lineDash\n        });\n      }\n    }\n    var textKey = this.textKey_;\n    if (!(this.textKey_ in this.textStates)) {\n      this.textStates[this.textKey_] = /** @type {import(\"../canvas.js\").TextState} */ ({\n        font: textState.font,\n        textAlign: textState.textAlign || defaultTextAlign,\n        scale: textState.scale\n      });\n    }\n    var fillKey = this.fillKey_;\n    if (fillState) {\n      if (!(fillKey in this.fillStates)) {\n        this.fillStates[fillKey] = /** @type {import(\"../canvas.js\").FillState} */ ({\n          fillStyle: fillState.fillStyle\n        });\n      }\n    }\n\n    var pixelRatio = this.pixelRatio;\n    var baseline = TEXT_ALIGN[textState.textBaseline];\n\n    var offsetY = this.textOffsetY_ * pixelRatio;\n    var text = this.text_;\n    var font = textState.font;\n    var textScale = textState.scale;\n    var strokeWidth = strokeState ? strokeState.lineWidth * textScale / 2 : 0;\n    var widths = this.widths_[font];\n    if (!widths) {\n      this.widths_[font] = widths = {};\n    }\n    this.instructions.push([CanvasInstruction.DRAW_CHARS,\n      begin, end, baseline, declutterGroup,\n      textState.overflow, fillKey, textState.maxAngle,\n      function(text) {\n        var width = widths[text];\n        if (!width) {\n          width = widths[text] = measureTextWidth(font, text);\n        }\n        return width * textScale * pixelRatio;\n      },\n      offsetY, strokeKey, strokeWidth * pixelRatio, text, textKey, 1\n    ]);\n    this.hitDetectionInstructions.push([CanvasInstruction.DRAW_CHARS,\n      begin, end, baseline, declutterGroup,\n      textState.overflow, fillKey, textState.maxAngle,\n      function(text) {\n        var width = widths[text];\n        if (!width) {\n          width = widths[text] = measureTextWidth(font, text);\n        }\n        return width * textScale;\n      },\n      offsetY, strokeKey, strokeWidth, text, textKey, 1 / pixelRatio\n    ]);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasTextReplay.prototype.setTextStyle = function setTextStyle (textStyle, declutterGroup) {\n    var textState, fillState, strokeState;\n    if (!textStyle) {\n      this.text_ = '';\n    } else {\n      this.declutterGroup_ = /** @type {import(\"../canvas.js\").DeclutterGroup} */ (declutterGroup);\n\n      var textFillStyle = textStyle.getFill();\n      if (!textFillStyle) {\n        fillState = this.textFillState_ = null;\n      } else {\n        fillState = this.textFillState_;\n        if (!fillState) {\n          fillState = this.textFillState_ = /** @type {import(\"../canvas.js\").FillState} */ ({});\n        }\n        fillState.fillStyle = asColorLike(\n          textFillStyle.getColor() || defaultFillStyle);\n      }\n\n      var textStrokeStyle = textStyle.getStroke();\n      if (!textStrokeStyle) {\n        strokeState = this.textStrokeState_ = null;\n      } else {\n        strokeState = this.textStrokeState_;\n        if (!strokeState) {\n          strokeState = this.textStrokeState_ = /** @type {import(\"../canvas.js\").StrokeState} */ ({});\n        }\n        var lineDash = textStrokeStyle.getLineDash();\n        var lineDashOffset = textStrokeStyle.getLineDashOffset();\n        var lineWidth = textStrokeStyle.getWidth();\n        var miterLimit = textStrokeStyle.getMiterLimit();\n        strokeState.lineCap = textStrokeStyle.getLineCap() || defaultLineCap;\n        strokeState.lineDash = lineDash ? lineDash.slice() : defaultLineDash;\n        strokeState.lineDashOffset =\n            lineDashOffset === undefined ? defaultLineDashOffset : lineDashOffset;\n        strokeState.lineJoin = textStrokeStyle.getLineJoin() || defaultLineJoin;\n        strokeState.lineWidth =\n            lineWidth === undefined ? defaultLineWidth : lineWidth;\n        strokeState.miterLimit =\n            miterLimit === undefined ? defaultMiterLimit : miterLimit;\n        strokeState.strokeStyle = asColorLike(\n          textStrokeStyle.getColor() || defaultStrokeStyle);\n      }\n\n      textState = this.textState_;\n      var font = textStyle.getFont() || defaultFont;\n      checkFont(font);\n      var textScale = textStyle.getScale();\n      textState.overflow = textStyle.getOverflow();\n      textState.font = font;\n      textState.maxAngle = textStyle.getMaxAngle();\n      textState.placement = textStyle.getPlacement();\n      textState.textAlign = textStyle.getTextAlign();\n      textState.textBaseline = textStyle.getTextBaseline() || defaultTextBaseline;\n      textState.backgroundFill = textStyle.getBackgroundFill();\n      textState.backgroundStroke = textStyle.getBackgroundStroke();\n      textState.padding = textStyle.getPadding() || defaultPadding;\n      textState.scale = textScale === undefined ? 1 : textScale;\n\n      var textOffsetX = textStyle.getOffsetX();\n      var textOffsetY = textStyle.getOffsetY();\n      var textRotateWithView = textStyle.getRotateWithView();\n      var textRotation = textStyle.getRotation();\n      this.text_ = textStyle.getText() || '';\n      this.textOffsetX_ = textOffsetX === undefined ? 0 : textOffsetX;\n      this.textOffsetY_ = textOffsetY === undefined ? 0 : textOffsetY;\n      this.textRotateWithView_ = textRotateWithView === undefined ? false : textRotateWithView;\n      this.textRotation_ = textRotation === undefined ? 0 : textRotation;\n\n      this.strokeKey_ = strokeState ?\n        (typeof strokeState.strokeStyle == 'string' ? strokeState.strokeStyle : getUid(strokeState.strokeStyle)) +\n        strokeState.lineCap + strokeState.lineDashOffset + '|' + strokeState.lineWidth +\n        strokeState.lineJoin + strokeState.miterLimit + '[' + strokeState.lineDash.join() + ']' :\n        '';\n      this.textKey_ = textState.font + textState.scale + (textState.textAlign || '?');\n      this.fillKey_ = fillState ?\n        (typeof fillState.fillStyle == 'string' ? fillState.fillStyle : ('|' + getUid(fillState.fillStyle))) :\n        '';\n    }\n  };\n\n  return CanvasTextReplay;\n}(CanvasReplay));\n\n\n/**\n * @param {string} font Font to use for measuring.\n * @param {Array<string>} lines Lines to measure.\n * @param {Array<number>} widths Array will be populated with the widths of\n * each line.\n * @return {number} Width of the whole text.\n */\nexport function measureTextWidths(font, lines, widths) {\n  var numLines = lines.length;\n  var width = 0;\n  for (var i = 0; i < numLines; ++i) {\n    var currentWidth = measureTextWidth(font, lines[i]);\n    width = Math.max(width, currentWidth);\n    widths.push(currentWidth);\n  }\n  return width;\n}\n\n\nexport default CanvasTextReplay;\n\n//# sourceMappingURL=TextReplay.js.map","/**\n * @module ol/render/canvas/ReplayGroup\n */\n\nimport {numberSafeCompareFunction} from '../../array.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {buffer, createEmpty, extendCoordinate} from '../../extent.js';\nimport {transform2D} from '../../geom/flat/transform.js';\nimport {isEmpty} from '../../obj.js';\nimport ReplayGroup from '../ReplayGroup.js';\nimport ReplayType from '../ReplayType.js';\nimport CanvasReplay from './Replay.js';\nimport CanvasImageReplay from './ImageReplay.js';\nimport CanvasLineStringReplay from './LineStringReplay.js';\nimport CanvasPolygonReplay from './PolygonReplay.js';\nimport CanvasTextReplay from './TextReplay.js';\nimport {ORDER} from '../replay.js';\nimport {create as createTransform, compose as composeTransform} from '../../transform.js';\n\n\n/**\n * @type {Object<ReplayType, typeof CanvasReplay>}\n */\nvar BATCH_CONSTRUCTORS = {\n  'Circle': CanvasPolygonReplay,\n  'Default': CanvasReplay,\n  'Image': CanvasImageReplay,\n  'LineString': CanvasLineStringReplay,\n  'Polygon': CanvasPolygonReplay,\n  'Text': CanvasTextReplay\n};\n\n\nvar CanvasReplayGroup = /*@__PURE__*/(function (ReplayGroup) {\n  function CanvasReplayGroup(\n    tolerance,\n    maxExtent,\n    resolution,\n    pixelRatio,\n    overlaps,\n    declutterTree,\n    opt_renderBuffer\n  ) {\n    ReplayGroup.call(this);\n\n    /**\n     * Declutter tree.\n     * @private\n     */\n    this.declutterTree_ = declutterTree;\n\n    /**\n     * @type {import(\"../canvas.js\").DeclutterGroup}\n     * @private\n     */\n    this.declutterGroup_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.tolerance_ = tolerance;\n\n    /**\n     * @private\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.maxExtent_ = maxExtent;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.overlaps_ = overlaps;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.pixelRatio_ = pixelRatio;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.resolution_ = resolution;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.renderBuffer_ = opt_renderBuffer;\n\n    /**\n     * @private\n     * @type {!Object<string, !Object<ReplayType, CanvasReplay>>}\n     */\n    this.replaysByZIndex_ = {};\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.hitDetectionContext_ = createCanvasContext2D(1, 1);\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.hitDetectionTransform_ = createTransform();\n  }\n\n  if ( ReplayGroup ) CanvasReplayGroup.__proto__ = ReplayGroup;\n  CanvasReplayGroup.prototype = Object.create( ReplayGroup && ReplayGroup.prototype );\n  CanvasReplayGroup.prototype.constructor = CanvasReplayGroup;\n\n  /**\n   * @inheritDoc\n   */\n  CanvasReplayGroup.prototype.addDeclutter = function addDeclutter (group) {\n    var declutter = null;\n    if (this.declutterTree_) {\n      if (group) {\n        declutter = this.declutterGroup_;\n        /** @type {number} */ (declutter[4])++;\n      } else {\n        declutter = this.declutterGroup_ = createEmpty();\n        declutter.push(1);\n      }\n    }\n    return declutter;\n  };\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../transform.js\").Transform} transform Transform.\n   */\n  CanvasReplayGroup.prototype.clip = function clip (context, transform) {\n    var flatClipCoords = this.getClipCoords(transform);\n    context.beginPath();\n    context.moveTo(flatClipCoords[0], flatClipCoords[1]);\n    context.lineTo(flatClipCoords[2], flatClipCoords[3]);\n    context.lineTo(flatClipCoords[4], flatClipCoords[5]);\n    context.lineTo(flatClipCoords[6], flatClipCoords[7]);\n    context.clip();\n  };\n\n  /**\n   * @param {Array<ReplayType>} replays Replays.\n   * @return {boolean} Has replays of the provided types.\n   */\n  CanvasReplayGroup.prototype.hasReplays = function hasReplays (replays) {\n    for (var zIndex in this.replaysByZIndex_) {\n      var candidates = this.replaysByZIndex_[zIndex];\n      for (var i = 0, ii = replays.length; i < ii; ++i) {\n        if (replays[i] in candidates) {\n          return true;\n        }\n      }\n    }\n    return false;\n  };\n\n  /**\n   * FIXME empty description for jsdoc\n   */\n  CanvasReplayGroup.prototype.finish = function finish () {\n    for (var zKey in this.replaysByZIndex_) {\n      var replays = this.replaysByZIndex_[zKey];\n      for (var replayKey in replays) {\n        replays[replayKey].finish();\n      }\n    }\n  };\n\n  /**\n   * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {number} resolution Resolution.\n   * @param {number} rotation Rotation.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   * @param {function((import(\"../../Feature.js\").default|import(\"../Feature.js\").default)): T} callback Feature callback.\n   * @param {Object<string, import(\"../canvas.js\").DeclutterGroup>} declutterReplays Declutter replays.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  CanvasReplayGroup.prototype.forEachFeatureAtCoordinate = function forEachFeatureAtCoordinate (\n    coordinate,\n    resolution,\n    rotation,\n    hitTolerance,\n    skippedFeaturesHash,\n    callback,\n    declutterReplays\n  ) {\n\n    hitTolerance = Math.round(hitTolerance);\n    var contextSize = hitTolerance * 2 + 1;\n    var transform = composeTransform(this.hitDetectionTransform_,\n      hitTolerance + 0.5, hitTolerance + 0.5,\n      1 / resolution, -1 / resolution,\n      -rotation,\n      -coordinate[0], -coordinate[1]);\n    var context = this.hitDetectionContext_;\n\n    if (context.canvas.width !== contextSize || context.canvas.height !== contextSize) {\n      context.canvas.width = contextSize;\n      context.canvas.height = contextSize;\n    } else {\n      context.clearRect(0, 0, contextSize, contextSize);\n    }\n\n    /**\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    var hitExtent;\n    if (this.renderBuffer_ !== undefined) {\n      hitExtent = createEmpty();\n      extendCoordinate(hitExtent, coordinate);\n      buffer(hitExtent, resolution * (this.renderBuffer_ + hitTolerance), hitExtent);\n    }\n\n    var mask = getCircleArray(hitTolerance);\n    var declutteredFeatures;\n    if (this.declutterTree_) {\n      declutteredFeatures = this.declutterTree_.all().map(function(entry) {\n        return entry.value;\n      });\n    }\n\n    var replayType;\n\n    /**\n     * @param {import(\"../../Feature.js\").default|import(\"../Feature.js\").default} feature Feature.\n     * @return {?} Callback result.\n     */\n    function featureCallback(feature) {\n      var imageData = context.getImageData(0, 0, contextSize, contextSize).data;\n      for (var i = 0; i < contextSize; i++) {\n        for (var j = 0; j < contextSize; j++) {\n          if (mask[i][j]) {\n            if (imageData[(j * contextSize + i) * 4 + 3] > 0) {\n              var result = (void 0);\n              if (!(declutteredFeatures && (replayType == ReplayType.IMAGE || replayType == ReplayType.TEXT)) ||\n                  declutteredFeatures.indexOf(feature) !== -1) {\n                result = callback(feature);\n              }\n              if (result) {\n                return result;\n              } else {\n                context.clearRect(0, 0, contextSize, contextSize);\n                return undefined;\n              }\n            }\n          }\n        }\n      }\n    }\n\n    /** @type {Array<number>} */\n    var zs = Object.keys(this.replaysByZIndex_).map(Number);\n    zs.sort(numberSafeCompareFunction);\n\n    var i, j, replays, replay, result;\n    for (i = zs.length - 1; i >= 0; --i) {\n      var zIndexKey = zs[i].toString();\n      replays = this.replaysByZIndex_[zIndexKey];\n      for (j = ORDER.length - 1; j >= 0; --j) {\n        replayType = ORDER[j];\n        replay = replays[replayType];\n        if (replay !== undefined) {\n          if (declutterReplays &&\n              (replayType == ReplayType.IMAGE || replayType == ReplayType.TEXT)) {\n            var declutter = declutterReplays[zIndexKey];\n            if (!declutter) {\n              declutterReplays[zIndexKey] = [replay, transform.slice(0)];\n            } else {\n              declutter.push(replay, transform.slice(0));\n            }\n          } else {\n            result = replay.replayHitDetection(context, transform, rotation,\n              skippedFeaturesHash, featureCallback, hitExtent);\n            if (result) {\n              return result;\n            }\n          }\n        }\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * @param {import(\"../../transform.js\").Transform} transform Transform.\n   * @return {Array<number>} Clip coordinates.\n   */\n  CanvasReplayGroup.prototype.getClipCoords = function getClipCoords (transform) {\n    var maxExtent = this.maxExtent_;\n    var minX = maxExtent[0];\n    var minY = maxExtent[1];\n    var maxX = maxExtent[2];\n    var maxY = maxExtent[3];\n    var flatClipCoords = [minX, minY, minX, maxY, maxX, maxY, maxX, minY];\n    transform2D(\n      flatClipCoords, 0, 8, 2, transform, flatClipCoords);\n    return flatClipCoords;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasReplayGroup.prototype.getReplay = function getReplay (zIndex, replayType) {\n    var zIndexKey = zIndex !== undefined ? zIndex.toString() : '0';\n    var replays = this.replaysByZIndex_[zIndexKey];\n    if (replays === undefined) {\n      replays = {};\n      this.replaysByZIndex_[zIndexKey] = replays;\n    }\n    var replay = replays[replayType];\n    if (replay === undefined) {\n      var Constructor = BATCH_CONSTRUCTORS[replayType];\n      replay = new Constructor(this.tolerance_, this.maxExtent_,\n        this.resolution_, this.pixelRatio_, this.overlaps_, this.declutterTree_);\n      replays[replayType] = replay;\n    }\n    return replay;\n  };\n\n  /**\n   * @return {Object<string, Object<ReplayType, CanvasReplay>>} Replays.\n   */\n  CanvasReplayGroup.prototype.getReplays = function getReplays () {\n    return this.replaysByZIndex_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasReplayGroup.prototype.isEmpty = function isEmpty$1 () {\n    return isEmpty(this.replaysByZIndex_);\n  };\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../transform.js\").Transform} transform Transform.\n   * @param {number} viewRotation View rotation.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   * @param {boolean} snapToPixel Snap point symbols and test to integer pixel.\n   * @param {Array<ReplayType>=} opt_replayTypes Ordered replay types to replay.\n   *     Default is {@link module:ol/render/replay~ORDER}\n   * @param {Object<string, import(\"../canvas.js\").DeclutterGroup>=} opt_declutterReplays Declutter replays.\n   */\n  CanvasReplayGroup.prototype.replay = function replay (\n    context,\n    transform,\n    viewRotation,\n    skippedFeaturesHash,\n    snapToPixel,\n    opt_replayTypes,\n    opt_declutterReplays\n  ) {\n\n    /** @type {Array<number>} */\n    var zs = Object.keys(this.replaysByZIndex_).map(Number);\n    zs.sort(numberSafeCompareFunction);\n\n    // setup clipping so that the parts of over-simplified geometries are not\n    // visible outside the current extent when panning\n    context.save();\n    this.clip(context, transform);\n\n    var replayTypes = opt_replayTypes ? opt_replayTypes : ORDER;\n    var i, ii, j, jj, replays, replay;\n    for (i = 0, ii = zs.length; i < ii; ++i) {\n      var zIndexKey = zs[i].toString();\n      replays = this.replaysByZIndex_[zIndexKey];\n      for (j = 0, jj = replayTypes.length; j < jj; ++j) {\n        var replayType = replayTypes[j];\n        replay = replays[replayType];\n        if (replay !== undefined) {\n          if (opt_declutterReplays &&\n              (replayType == ReplayType.IMAGE || replayType == ReplayType.TEXT)) {\n            var declutter = opt_declutterReplays[zIndexKey];\n            if (!declutter) {\n              opt_declutterReplays[zIndexKey] = [replay, transform.slice(0)];\n            } else {\n              declutter.push(replay, transform.slice(0));\n            }\n          } else {\n            replay.replay(context, transform, viewRotation, skippedFeaturesHash, snapToPixel);\n          }\n        }\n      }\n    }\n\n    context.restore();\n  };\n\n  return CanvasReplayGroup;\n}(ReplayGroup));\n\n\n/**\n * This cache is used for storing calculated pixel circles for increasing performance.\n * It is a static property to allow each Replaygroup to access it.\n * @type {Object<number, Array<Array<(boolean|undefined)>>>}\n */\nvar circleArrayCache = {\n  0: [[true]]\n};\n\n\n/**\n * This method fills a row in the array from the given coordinate to the\n * middle with `true`.\n * @param {Array<Array<(boolean|undefined)>>} array The array that will be altered.\n * @param {number} x X coordinate.\n * @param {number} y Y coordinate.\n */\nfunction fillCircleArrayRowToMiddle(array, x, y) {\n  var i;\n  var radius = Math.floor(array.length / 2);\n  if (x >= radius) {\n    for (i = radius; i < x; i++) {\n      array[i][y] = true;\n    }\n  } else if (x < radius) {\n    for (i = x + 1; i < radius; i++) {\n      array[i][y] = true;\n    }\n  }\n}\n\n\n/**\n * This methods creates a circle inside a fitting array. Points inside the\n * circle are marked by true, points on the outside are undefined.\n * It uses the midpoint circle algorithm.\n * A cache is used to increase performance.\n * @param {number} radius Radius.\n * @returns {Array<Array<(boolean|undefined)>>} An array with marked circle points.\n */\nexport function getCircleArray(radius) {\n  if (circleArrayCache[radius] !== undefined) {\n    return circleArrayCache[radius];\n  }\n\n  var arraySize = radius * 2 + 1;\n  var arr = new Array(arraySize);\n  for (var i = 0; i < arraySize; i++) {\n    arr[i] = new Array(arraySize);\n  }\n\n  var x = radius;\n  var y = 0;\n  var error = 0;\n\n  while (x >= y) {\n    fillCircleArrayRowToMiddle(arr, radius + x, radius + y);\n    fillCircleArrayRowToMiddle(arr, radius + y, radius + x);\n    fillCircleArrayRowToMiddle(arr, radius - y, radius + x);\n    fillCircleArrayRowToMiddle(arr, radius - x, radius + y);\n    fillCircleArrayRowToMiddle(arr, radius - x, radius - y);\n    fillCircleArrayRowToMiddle(arr, radius - y, radius - x);\n    fillCircleArrayRowToMiddle(arr, radius + y, radius - x);\n    fillCircleArrayRowToMiddle(arr, radius + x, radius - y);\n\n    y++;\n    error += 1 + 2 * y;\n    if (2 * (error - x) + 1 > 0) {\n      x -= 1;\n      error += 1 - 2 * x;\n    }\n  }\n\n  circleArrayCache[radius] = arr;\n  return arr;\n}\n\n\n/**\n * @param {!Object<string, Array<*>>} declutterReplays Declutter replays.\n * @param {CanvasRenderingContext2D} context Context.\n * @param {number} rotation Rotation.\n * @param {boolean} snapToPixel Snap point symbols and text to integer pixels.\n */\nexport function replayDeclutter(declutterReplays, context, rotation, snapToPixel) {\n  var zs = Object.keys(declutterReplays).map(Number).sort(numberSafeCompareFunction);\n  var skippedFeatureUids = {};\n  for (var z = 0, zz = zs.length; z < zz; ++z) {\n    var replayData = declutterReplays[zs[z].toString()];\n    for (var i = 0, ii = replayData.length; i < ii;) {\n      var replay = replayData[i++];\n      var transform = replayData[i++];\n      replay.replay(context, transform, rotation, skippedFeatureUids, snapToPixel);\n    }\n  }\n}\n\n\nexport default CanvasReplayGroup;\n\n//# sourceMappingURL=ReplayGroup.js.map","/**\n * @module ol/renderer/vector\n */\nimport {getUid} from '../util.js';\nimport ImageState from '../ImageState.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport ReplayType from '../render/ReplayType.js';\n\n\n/**\n * Tolerance for geometry simplification in device pixels.\n * @type {number}\n */\nvar SIMPLIFY_TOLERANCE = 0.5;\n\n\n/**\n * @const\n * @type {Object<import(\"../geom/GeometryType.js\").default,\n *                function(import(\"../render/ReplayGroup.js\").default, import(\"../geom/Geometry.js\").default,\n *                         import(\"../style/Style.js\").default, Object)>}\n */\nvar GEOMETRY_RENDERERS = {\n  'Point': renderPointGeometry,\n  'LineString': renderLineStringGeometry,\n  'Polygon': renderPolygonGeometry,\n  'MultiPoint': renderMultiPointGeometry,\n  'MultiLineString': renderMultiLineStringGeometry,\n  'MultiPolygon': renderMultiPolygonGeometry,\n  'GeometryCollection': renderGeometryCollectionGeometry,\n  'Circle': renderCircleGeometry\n};\n\n\n/**\n * @param {import(\"../Feature.js\").FeatureLike} feature1 Feature 1.\n * @param {import(\"../Feature.js\").FeatureLike} feature2 Feature 2.\n * @return {number} Order.\n */\nexport function defaultOrder(feature1, feature2) {\n  return parseInt(getUid(feature1), 10) - parseInt(getUid(feature2), 10);\n}\n\n\n/**\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Squared pixel tolerance.\n */\nexport function getSquaredTolerance(resolution, pixelRatio) {\n  var tolerance = getTolerance(resolution, pixelRatio);\n  return tolerance * tolerance;\n}\n\n\n/**\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Pixel tolerance.\n */\nexport function getTolerance(resolution, pixelRatio) {\n  return SIMPLIFY_TOLERANCE * resolution / pixelRatio;\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/Circle.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").default} feature Feature.\n */\nfunction renderCircleGeometry(replayGroup, geometry, style, feature) {\n  var fillStyle = style.getFill();\n  var strokeStyle = style.getStroke();\n  if (fillStyle || strokeStyle) {\n    var circleReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.CIRCLE);\n    circleReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n    circleReplay.drawCircle(geometry, feature);\n  }\n  var textStyle = style.getText();\n  if (textStyle) {\n    var textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n    textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(false));\n    textReplay.drawText(geometry, feature);\n  }\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {function(this: T, import(\"../events/Event.js\").default)} listener Listener function.\n * @param {T} thisArg Value to use as `this` when executing `listener`.\n * @return {boolean} `true` if style is loading.\n * @template T\n */\nexport function renderFeature(replayGroup, feature, style, squaredTolerance, listener, thisArg) {\n  var loading = false;\n  var imageStyle = style.getImage();\n  if (imageStyle) {\n    var imageState = imageStyle.getImageState();\n    if (imageState == ImageState.LOADED || imageState == ImageState.ERROR) {\n      imageStyle.unlistenImageChange(listener, thisArg);\n    } else {\n      if (imageState == ImageState.IDLE) {\n        imageStyle.load();\n      }\n      imageState = imageStyle.getImageState();\n      imageStyle.listenImageChange(listener, thisArg);\n      loading = true;\n    }\n  }\n  renderFeatureInternal(replayGroup, feature, style, squaredTolerance);\n\n  return loading;\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {number} squaredTolerance Squared tolerance.\n */\nfunction renderFeatureInternal(replayGroup, feature, style, squaredTolerance) {\n  var geometry = style.getGeometryFunction()(feature);\n  if (!geometry) {\n    return;\n  }\n  var simplifiedGeometry = geometry.getSimplifiedGeometry(squaredTolerance);\n  var renderer = style.getRenderer();\n  if (renderer) {\n    renderGeometry(replayGroup, simplifiedGeometry, style, feature);\n  } else {\n    var geometryRenderer = GEOMETRY_RENDERERS[simplifiedGeometry.getType()];\n    geometryRenderer(replayGroup, simplifiedGeometry, style, feature);\n  }\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/Geometry.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\nfunction renderGeometry(replayGroup, geometry, style, feature) {\n  if (geometry.getType() == GeometryType.GEOMETRY_COLLECTION) {\n    var geometries = /** @type {import(\"../geom/GeometryCollection.js\").default} */ (geometry).getGeometries();\n    for (var i = 0, ii = geometries.length; i < ii; ++i) {\n      renderGeometry(replayGroup, geometries[i], style, feature);\n    }\n    return;\n  }\n  var replay = replayGroup.getReplay(style.getZIndex(), ReplayType.DEFAULT);\n  replay.drawCustom(/** @type {import(\"../geom/SimpleGeometry.js\").default} */ (geometry), feature, style.getRenderer());\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/GeometryCollection.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").default} feature Feature.\n */\nfunction renderGeometryCollectionGeometry(replayGroup, geometry, style, feature) {\n  var geometries = geometry.getGeometriesArray();\n  var i, ii;\n  for (i = 0, ii = geometries.length; i < ii; ++i) {\n    var geometryRenderer =\n        GEOMETRY_RENDERERS[geometries[i].getType()];\n    geometryRenderer(replayGroup, geometries[i], style, feature);\n  }\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/LineString.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\nfunction renderLineStringGeometry(replayGroup, geometry, style, feature) {\n  var strokeStyle = style.getStroke();\n  if (strokeStyle) {\n    var lineStringReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.LINE_STRING);\n    lineStringReplay.setFillStrokeStyle(null, strokeStyle);\n    lineStringReplay.drawLineString(geometry, feature);\n  }\n  var textStyle = style.getText();\n  if (textStyle) {\n    var textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n    textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(false));\n    textReplay.drawText(geometry, feature);\n  }\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/MultiLineString.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\nfunction renderMultiLineStringGeometry(replayGroup, geometry, style, feature) {\n  var strokeStyle = style.getStroke();\n  if (strokeStyle) {\n    var lineStringReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.LINE_STRING);\n    lineStringReplay.setFillStrokeStyle(null, strokeStyle);\n    lineStringReplay.drawMultiLineString(geometry, feature);\n  }\n  var textStyle = style.getText();\n  if (textStyle) {\n    var textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n    textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(false));\n    textReplay.drawText(geometry, feature);\n  }\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/MultiPolygon.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").default} feature Feature.\n */\nfunction renderMultiPolygonGeometry(replayGroup, geometry, style, feature) {\n  var fillStyle = style.getFill();\n  var strokeStyle = style.getStroke();\n  if (strokeStyle || fillStyle) {\n    var polygonReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.POLYGON);\n    polygonReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n    polygonReplay.drawMultiPolygon(geometry, feature);\n  }\n  var textStyle = style.getText();\n  if (textStyle) {\n    var textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n    textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(false));\n    textReplay.drawText(geometry, feature);\n  }\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/Point.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\nfunction renderPointGeometry(replayGroup, geometry, style, feature) {\n  var imageStyle = style.getImage();\n  if (imageStyle) {\n    if (imageStyle.getImageState() != ImageState.LOADED) {\n      return;\n    }\n    var imageReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.IMAGE);\n    imageReplay.setImageStyle(imageStyle, replayGroup.addDeclutter(false));\n    imageReplay.drawPoint(geometry, feature);\n  }\n  var textStyle = style.getText();\n  if (textStyle) {\n    var textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n    textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(!!imageStyle));\n    textReplay.drawText(geometry, feature);\n  }\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/MultiPoint.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\nfunction renderMultiPointGeometry(replayGroup, geometry, style, feature) {\n  var imageStyle = style.getImage();\n  if (imageStyle) {\n    if (imageStyle.getImageState() != ImageState.LOADED) {\n      return;\n    }\n    var imageReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.IMAGE);\n    imageReplay.setImageStyle(imageStyle, replayGroup.addDeclutter(false));\n    imageReplay.drawMultiPoint(geometry, feature);\n  }\n  var textStyle = style.getText();\n  if (textStyle) {\n    var textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n    textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(!!imageStyle));\n    textReplay.drawText(geometry, feature);\n  }\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/Polygon.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\nfunction renderPolygonGeometry(replayGroup, geometry, style, feature) {\n  var fillStyle = style.getFill();\n  var strokeStyle = style.getStroke();\n  if (fillStyle || strokeStyle) {\n    var polygonReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.POLYGON);\n    polygonReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n    polygonReplay.drawPolygon(geometry, feature);\n  }\n  var textStyle = style.getText();\n  if (textStyle) {\n    var textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n    textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(false));\n    textReplay.drawText(geometry, feature);\n  }\n}\n\n//# sourceMappingURL=vector.js.map","/**\n * @module ol/renderer/canvas/VectorLayer\n */\nimport {getUid} from '../../util.js';\nimport LayerType from '../../LayerType.js';\nimport ViewHint from '../../ViewHint.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {listen, unlisten} from '../../events.js';\nimport EventType from '../../events/EventType.js';\nimport rbush from 'rbush';\nimport {buffer, createEmpty, containsExtent, getWidth} from '../../extent.js';\nimport RenderEventType from '../../render/EventType.js';\nimport {labelCache, rotateAtOffset} from '../../render/canvas.js';\nimport CanvasReplayGroup from '../../render/canvas/ReplayGroup.js';\nimport CanvasLayerRenderer from './Layer.js';\nimport {defaultOrder as defaultRenderOrder, getTolerance as getRenderTolerance, getSquaredTolerance as getSquaredRenderTolerance, renderFeature} from '../vector.js';\n\n/**\n * @classdesc\n * Canvas renderer for vector layers.\n * @api\n */\nvar CanvasVectorLayerRenderer = /*@__PURE__*/(function (CanvasLayerRenderer) {\n  function CanvasVectorLayerRenderer(vectorLayer) {\n\n    CanvasLayerRenderer.call(this, vectorLayer);\n\n    /**\n     * Declutter tree.\n     * @private\n     */\n    this.declutterTree_ = vectorLayer.getDeclutter() ? rbush(9, undefined) : null;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.dirty_ = false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedRevision_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedResolution_ = NaN;\n\n    /**\n     * @private\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.renderedExtent_ = createEmpty();\n\n    /**\n     * @private\n     * @type {function(import(\"../../Feature.js\").default, import(\"../../Feature.js\").default): number|null}\n     */\n    this.renderedRenderOrder_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../render/canvas/ReplayGroup.js\").default}\n     */\n    this.replayGroup_ = null;\n\n    /**\n     * A new replay group had to be created by `prepareFrame()`\n     * @type {boolean}\n     */\n    this.replayGroupChanged = true;\n\n    /**\n     * @type {CanvasRenderingContext2D}\n     */\n    this.context = createCanvasContext2D();\n\n    listen(labelCache, EventType.CLEAR, this.handleFontsChanged_, this);\n\n  }\n\n  if ( CanvasLayerRenderer ) CanvasVectorLayerRenderer.__proto__ = CanvasLayerRenderer;\n  CanvasVectorLayerRenderer.prototype = Object.create( CanvasLayerRenderer && CanvasLayerRenderer.prototype );\n  CanvasVectorLayerRenderer.prototype.constructor = CanvasVectorLayerRenderer;\n\n  /**\n   * @inheritDoc\n   */\n  CanvasVectorLayerRenderer.prototype.disposeInternal = function disposeInternal () {\n    unlisten(labelCache, EventType.CLEAR, this.handleFontsChanged_, this);\n    CanvasLayerRenderer.prototype.disposeInternal.call(this);\n  };\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../layer/Layer.js\").State} layerState Layer state.\n   */\n  CanvasVectorLayerRenderer.prototype.compose = function compose (context, frameState, layerState) {\n    var extent = frameState.extent;\n    var pixelRatio = frameState.pixelRatio;\n    var skippedFeatureUids = layerState.managed ?\n      frameState.skippedFeatureUids : {};\n    var viewState = frameState.viewState;\n    var projection = viewState.projection;\n    var rotation = viewState.rotation;\n    var projectionExtent = projection.getExtent();\n    var vectorSource = /** @type {import(\"../../source/Vector.js\").default} */ (this.getLayer().getSource());\n\n    var transform = this.getTransform(frameState, 0);\n\n    // clipped rendering if layer extent is set\n    var clipExtent = layerState.extent;\n    var clipped = clipExtent !== undefined;\n    if (clipped) {\n      this.clip(context, frameState, /** @type {import(\"../../extent.js\").Extent} */ (clipExtent));\n    }\n    var replayGroup = this.replayGroup_;\n    if (replayGroup && !replayGroup.isEmpty()) {\n      if (this.declutterTree_) {\n        this.declutterTree_.clear();\n      }\n      var layer = /** @type {import(\"../../layer/Vector.js\").default} */ (this.getLayer());\n      var drawOffsetX = 0;\n      var drawOffsetY = 0;\n      var replayContext;\n      var transparentLayer = layerState.opacity !== 1;\n      var hasRenderListeners = layer.hasListener(RenderEventType.RENDER);\n      if (transparentLayer || hasRenderListeners) {\n        var drawWidth = context.canvas.width;\n        var drawHeight = context.canvas.height;\n        if (rotation) {\n          var drawSize = Math.round(Math.sqrt(drawWidth * drawWidth + drawHeight * drawHeight));\n          drawOffsetX = (drawSize - drawWidth) / 2;\n          drawOffsetY = (drawSize - drawHeight) / 2;\n          drawWidth = drawHeight = drawSize;\n        }\n        // resize and clear\n        this.context.canvas.width = drawWidth;\n        this.context.canvas.height = drawHeight;\n        replayContext = this.context;\n      } else {\n        replayContext = context;\n      }\n\n      var alpha = replayContext.globalAlpha;\n      if (!transparentLayer) {\n        // for performance reasons, context.save / context.restore is not used\n        // to save and restore the transformation matrix and the opacity.\n        // see http://jsperf.com/context-save-restore-versus-variable\n        replayContext.globalAlpha = layerState.opacity;\n      }\n\n      if (replayContext != context) {\n        replayContext.translate(drawOffsetX, drawOffsetY);\n      }\n\n      var viewHints = frameState.viewHints;\n      var snapToPixel = !(viewHints[ViewHint.ANIMATING] || viewHints[ViewHint.INTERACTING]);\n      var width = frameState.size[0] * pixelRatio;\n      var height = frameState.size[1] * pixelRatio;\n      rotateAtOffset(replayContext, -rotation,\n        width / 2, height / 2);\n      replayGroup.replay(replayContext, transform, rotation, skippedFeatureUids, snapToPixel);\n      if (vectorSource.getWrapX() && projection.canWrapX() &&\n          !containsExtent(projectionExtent, extent)) {\n        var startX = extent[0];\n        var worldWidth = getWidth(projectionExtent);\n        var world = 0;\n        var offsetX;\n        while (startX < projectionExtent[0]) {\n          --world;\n          offsetX = worldWidth * world;\n          transform = this.getTransform(frameState, offsetX);\n          replayGroup.replay(replayContext, transform, rotation, skippedFeatureUids, snapToPixel);\n          startX += worldWidth;\n        }\n        world = 0;\n        startX = extent[2];\n        while (startX > projectionExtent[2]) {\n          ++world;\n          offsetX = worldWidth * world;\n          transform = this.getTransform(frameState, offsetX);\n          replayGroup.replay(replayContext, transform, rotation, skippedFeatureUids, snapToPixel);\n          startX -= worldWidth;\n        }\n      }\n      rotateAtOffset(replayContext, rotation,\n        width / 2, height / 2);\n\n      if (hasRenderListeners) {\n        this.dispatchRenderEvent(replayContext, frameState, transform);\n      }\n      if (replayContext != context) {\n        if (transparentLayer) {\n          var mainContextAlpha = context.globalAlpha;\n          context.globalAlpha = layerState.opacity;\n          context.drawImage(replayContext.canvas, -drawOffsetX, -drawOffsetY);\n          context.globalAlpha = mainContextAlpha;\n        } else {\n          context.drawImage(replayContext.canvas, -drawOffsetX, -drawOffsetY);\n        }\n        replayContext.translate(-drawOffsetX, -drawOffsetY);\n      }\n\n      if (!transparentLayer) {\n        replayContext.globalAlpha = alpha;\n      }\n    }\n\n    if (clipped) {\n      context.restore();\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasVectorLayerRenderer.prototype.composeFrame = function composeFrame (frameState, layerState, context) {\n    var transform = this.getTransform(frameState, 0);\n    this.preCompose(context, frameState, transform);\n    this.compose(context, frameState, layerState);\n    this.postCompose(context, frameState, layerState, transform);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasVectorLayerRenderer.prototype.forEachFeatureAtCoordinate = function forEachFeatureAtCoordinate (coordinate, frameState, hitTolerance, callback, thisArg) {\n    if (!this.replayGroup_) {\n      return undefined;\n    } else {\n      var resolution = frameState.viewState.resolution;\n      var rotation = frameState.viewState.rotation;\n      var layer = /** @type {import(\"../../layer/Vector.js\").default} */ (this.getLayer());\n      /** @type {!Object<string, boolean>} */\n      var features = {};\n      var result = this.replayGroup_.forEachFeatureAtCoordinate(coordinate, resolution, rotation, hitTolerance, {},\n        /**\n         * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n         * @return {?} Callback result.\n         */\n        function(feature) {\n          var key = getUid(feature);\n          if (!(key in features)) {\n            features[key] = true;\n            return callback.call(thisArg, feature, layer);\n          }\n        }, null);\n      return result;\n    }\n  };\n\n  /**\n   * @param {import(\"../../events/Event.js\").default} event Event.\n   */\n  CanvasVectorLayerRenderer.prototype.handleFontsChanged_ = function handleFontsChanged_ (event) {\n    var layer = this.getLayer();\n    if (layer.getVisible() && this.replayGroup_) {\n      layer.changed();\n    }\n  };\n\n  /**\n   * Handle changes in image style state.\n   * @param {import(\"../../events/Event.js\").default} event Image style change event.\n   * @private\n   */\n  CanvasVectorLayerRenderer.prototype.handleStyleImageChange_ = function handleStyleImageChange_ (event) {\n    this.renderIfReadyAndVisible();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasVectorLayerRenderer.prototype.prepareFrame = function prepareFrame (frameState, layerState) {\n    var vectorLayer = /** @type {import(\"../../layer/Vector.js\").default} */ (this.getLayer());\n    var vectorSource = /** @type {import(\"../../source/Vector.js\").default} */ (vectorLayer.getSource());\n\n    var animating = frameState.viewHints[ViewHint.ANIMATING];\n    var interacting = frameState.viewHints[ViewHint.INTERACTING];\n    var updateWhileAnimating = vectorLayer.getUpdateWhileAnimating();\n    var updateWhileInteracting = vectorLayer.getUpdateWhileInteracting();\n\n    if (!this.dirty_ && (!updateWhileAnimating && animating) ||\n        (!updateWhileInteracting && interacting)) {\n      return true;\n    }\n\n    var frameStateExtent = frameState.extent;\n    var viewState = frameState.viewState;\n    var projection = viewState.projection;\n    var resolution = viewState.resolution;\n    var pixelRatio = frameState.pixelRatio;\n    var vectorLayerRevision = vectorLayer.getRevision();\n    var vectorLayerRenderBuffer = vectorLayer.getRenderBuffer();\n    var vectorLayerRenderOrder = vectorLayer.getRenderOrder();\n\n    if (vectorLayerRenderOrder === undefined) {\n      vectorLayerRenderOrder = defaultRenderOrder;\n    }\n\n    var extent = buffer(frameStateExtent,\n      vectorLayerRenderBuffer * resolution);\n    var projectionExtent = viewState.projection.getExtent();\n\n    if (vectorSource.getWrapX() && viewState.projection.canWrapX() &&\n        !containsExtent(projectionExtent, frameState.extent)) {\n      // For the replay group, we need an extent that intersects the real world\n      // (-180° to +180°). To support geometries in a coordinate range from -540°\n      // to +540°, we add at least 1 world width on each side of the projection\n      // extent. If the viewport is wider than the world, we need to add half of\n      // the viewport width to make sure we cover the whole viewport.\n      var worldWidth = getWidth(projectionExtent);\n      var gutter = Math.max(getWidth(extent) / 2, worldWidth);\n      extent[0] = projectionExtent[0] - gutter;\n      extent[2] = projectionExtent[2] + gutter;\n    }\n\n    if (!this.dirty_ &&\n        this.renderedResolution_ == resolution &&\n        this.renderedRevision_ == vectorLayerRevision &&\n        this.renderedRenderOrder_ == vectorLayerRenderOrder &&\n        containsExtent(this.renderedExtent_, extent)) {\n      this.replayGroupChanged = false;\n      return true;\n    }\n\n    this.replayGroup_ = null;\n\n    this.dirty_ = false;\n\n    var replayGroup = new CanvasReplayGroup(\n      getRenderTolerance(resolution, pixelRatio), extent, resolution,\n      pixelRatio, vectorSource.getOverlaps(), this.declutterTree_, vectorLayer.getRenderBuffer());\n    vectorSource.loadFeatures(extent, resolution, projection);\n    /**\n     * @param {import(\"../../Feature.js\").default} feature Feature.\n     * @this {CanvasVectorLayerRenderer}\n     */\n    var render = function(feature) {\n      var styles;\n      var styleFunction = feature.getStyleFunction() || vectorLayer.getStyleFunction();\n      if (styleFunction) {\n        styles = styleFunction(feature, resolution);\n      }\n      if (styles) {\n        var dirty = this.renderFeature(\n          feature, resolution, pixelRatio, styles, replayGroup);\n        this.dirty_ = this.dirty_ || dirty;\n      }\n    }.bind(this);\n    if (vectorLayerRenderOrder) {\n      /** @type {Array<import(\"../../Feature.js\").default>} */\n      var features = [];\n      vectorSource.forEachFeatureInExtent(extent,\n        /**\n         * @param {import(\"../../Feature.js\").default} feature Feature.\n         */\n        function(feature) {\n          features.push(feature);\n        });\n      features.sort(vectorLayerRenderOrder);\n      for (var i = 0, ii = features.length; i < ii; ++i) {\n        render(features[i]);\n      }\n    } else {\n      vectorSource.forEachFeatureInExtent(extent, render);\n    }\n    replayGroup.finish();\n\n    this.renderedResolution_ = resolution;\n    this.renderedRevision_ = vectorLayerRevision;\n    this.renderedRenderOrder_ = vectorLayerRenderOrder;\n    this.renderedExtent_ = extent;\n    this.replayGroup_ = replayGroup;\n\n    this.replayGroupChanged = true;\n    return true;\n  };\n\n  /**\n   * @param {import(\"../../Feature.js\").default} feature Feature.\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../../style/Style.js\").default|Array<import(\"../../style/Style.js\").default>} styles The style or array of styles.\n   * @param {import(\"../../render/canvas/ReplayGroup.js\").default} replayGroup Replay group.\n   * @return {boolean} `true` if an image is loading.\n   */\n  CanvasVectorLayerRenderer.prototype.renderFeature = function renderFeature$1 (feature, resolution, pixelRatio, styles, replayGroup) {\n    if (!styles) {\n      return false;\n    }\n    var loading = false;\n    if (Array.isArray(styles)) {\n      for (var i = 0, ii = styles.length; i < ii; ++i) {\n        loading = renderFeature(\n          replayGroup, feature, styles[i],\n          getSquaredRenderTolerance(resolution, pixelRatio),\n          this.handleStyleImageChange_, this) || loading;\n      }\n    } else {\n      loading = renderFeature(\n        replayGroup, feature, styles,\n        getSquaredRenderTolerance(resolution, pixelRatio),\n        this.handleStyleImageChange_, this);\n    }\n    return loading;\n  };\n\n  return CanvasVectorLayerRenderer;\n}(CanvasLayerRenderer));\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {import(\"../../layer/Layer.js\").default} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nCanvasVectorLayerRenderer['handles'] = function(layer) {\n  return layer.getType() === LayerType.VECTOR;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {import(\"../Map.js\").default} mapRenderer The map renderer.\n * @param {import(\"../../layer/Layer.js\").default} layer The layer to be rendererd.\n * @return {CanvasVectorLayerRenderer} The layer renderer.\n */\nCanvasVectorLayerRenderer['create'] = function(mapRenderer, layer) {\n  return new CanvasVectorLayerRenderer(/** @type {import(\"../../layer/Vector.js\").default} */ (layer));\n};\n\n\nexport default CanvasVectorLayerRenderer;\n\n//# sourceMappingURL=VectorLayer.js.map","/**\n * @module ol/layer/VectorTileRenderType\n */\n\n/**\n * @enum {string}\n * Render mode for vector tiles:\n *  * `'image'`: Vector tiles are rendered as images. Great performance, but\n *    point symbols and texts are always rotated with the view and pixels are\n *    scaled during zoom animations.\n *  * `'hybrid'`: Polygon and line elements are rendered as images, so pixels\n *    are scaled during zoom animations. Point symbols and texts are accurately\n *    rendered as vectors and can stay upright on rotated views.\n *  * `'vector'`: Vector tiles are rendered as vectors. Most accurate rendering\n *    even during animations, but slower performance than the other options.\n * @api\n */\nexport default {\n  IMAGE: 'image',\n  HYBRID: 'hybrid',\n  VECTOR: 'vector'\n};\n\n//# sourceMappingURL=VectorTileRenderType.js.map","/**\n * @module ol/renderer/canvas/VectorTileLayer\n */\nimport {getUid} from '../../util.js';\nimport LayerType from '../../LayerType.js';\nimport TileState from '../../TileState.js';\nimport ViewHint from '../../ViewHint.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {listen, unlisten} from '../../events.js';\nimport EventType from '../../events/EventType.js';\nimport rbush from 'rbush';\nimport {buffer, containsCoordinate, equals, getIntersection, getTopLeft, intersects} from '../../extent.js';\nimport VectorTileRenderType from '../../layer/VectorTileRenderType.js';\nimport {equivalent as equivalentProjection} from '../../proj.js';\nimport Units from '../../proj/Units.js';\nimport ReplayType from '../../render/ReplayType.js';\nimport {labelCache, rotateAtOffset} from '../../render/canvas.js';\nimport CanvasReplayGroup, {replayDeclutter} from '../../render/canvas/ReplayGroup.js';\nimport {ORDER} from '../../render/replay.js';\nimport CanvasTileLayerRenderer from './TileLayer.js';\nimport {getSquaredTolerance as getSquaredRenderTolerance, renderFeature} from '../vector.js';\nimport {\n  create as createTransform,\n  compose as composeTransform,\n  reset as resetTransform,\n  scale as scaleTransform,\n  translate as translateTransform\n} from '../../transform.js';\n\n\n/**\n * @type {!Object<string, Array<import(\"../../render/ReplayType.js\").default>>}\n */\nvar IMAGE_REPLAYS = {\n  'image': [ReplayType.POLYGON, ReplayType.CIRCLE,\n    ReplayType.LINE_STRING, ReplayType.IMAGE, ReplayType.TEXT],\n  'hybrid': [ReplayType.POLYGON, ReplayType.LINE_STRING]\n};\n\n\n/**\n * @type {!Object<string, Array<import(\"../../render/ReplayType.js\").default>>}\n */\nvar VECTOR_REPLAYS = {\n  'image': [ReplayType.DEFAULT],\n  'hybrid': [ReplayType.IMAGE, ReplayType.TEXT, ReplayType.DEFAULT],\n  'vector': ORDER\n};\n\n\n/**\n * @classdesc\n * Canvas renderer for vector tile layers.\n * @api\n */\nvar CanvasVectorTileLayerRenderer = /*@__PURE__*/(function (CanvasTileLayerRenderer) {\n  function CanvasVectorTileLayerRenderer(layer) {\n\n    CanvasTileLayerRenderer.call(this, layer, true);\n\n    /**\n     * Declutter tree.\n     * @private\n     */\n    this.declutterTree_ = layer.getDeclutter() ? rbush(9, undefined) : null;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.dirty_ = false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedLayerRevision_;\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.tmpTransform_ = createTransform();\n\n    var renderMode = layer.getRenderMode();\n\n    // Use lower resolution for pure vector rendering. Closest resolution otherwise.\n    this.zDirection = renderMode === VectorTileRenderType.VECTOR ? 1 : 0;\n\n    if (renderMode !== VectorTileRenderType.VECTOR) {\n      this.context = createCanvasContext2D();\n    }\n\n\n    listen(labelCache, EventType.CLEAR, this.handleFontsChanged_, this);\n\n  }\n\n  if ( CanvasTileLayerRenderer ) CanvasVectorTileLayerRenderer.__proto__ = CanvasTileLayerRenderer;\n  CanvasVectorTileLayerRenderer.prototype = Object.create( CanvasTileLayerRenderer && CanvasTileLayerRenderer.prototype );\n  CanvasVectorTileLayerRenderer.prototype.constructor = CanvasVectorTileLayerRenderer;\n\n  /**\n   * @inheritDoc\n   */\n  CanvasVectorTileLayerRenderer.prototype.disposeInternal = function disposeInternal () {\n    unlisten(labelCache, EventType.CLEAR, this.handleFontsChanged_, this);\n    CanvasTileLayerRenderer.prototype.disposeInternal.call(this);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasVectorTileLayerRenderer.prototype.getTile = function getTile (z, x, y, pixelRatio, projection) {\n    var tile = CanvasTileLayerRenderer.prototype.getTile.call(this, z, x, y, pixelRatio, projection);\n    if (tile.getState() === TileState.LOADED) {\n      this.createReplayGroup_(/** @type {import(\"../../VectorImageTile.js\").default} */ (tile), pixelRatio, projection);\n      if (this.context) {\n        this.renderTileImage_(/** @type {import(\"../../VectorImageTile.js\").default} */ (tile), pixelRatio, projection);\n      }\n    }\n    return tile;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasVectorTileLayerRenderer.prototype.getTileImage = function getTileImage (tile) {\n    var tileLayer = /** @type {import(\"../../layer/Tile.js\").default} */ (this.getLayer());\n    return /** @type {import(\"../../VectorImageTile.js\").default} */ (tile).getImage(tileLayer);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasVectorTileLayerRenderer.prototype.prepareFrame = function prepareFrame (frameState, layerState) {\n    var layer = /** @type {import(\"../../layer/Vector.js\").default} */ (this.getLayer());\n    var layerRevision = layer.getRevision();\n    if (this.renderedLayerRevision_ != layerRevision) {\n      this.renderedTiles.length = 0;\n    }\n    this.renderedLayerRevision_ = layerRevision;\n    return CanvasTileLayerRenderer.prototype.prepareFrame.call(this, frameState, layerState);\n  };\n\n  /**\n   * @param {import(\"../../VectorImageTile.js\").default} tile Tile.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../../proj/Projection.js\").default} projection Projection.\n   * @private\n   */\n  CanvasVectorTileLayerRenderer.prototype.createReplayGroup_ = function createReplayGroup_ (tile, pixelRatio, projection) {\n    var this$1 = this;\n\n    var layer = /** @type {import(\"../../layer/Vector.js\").default} */ (this.getLayer());\n    var revision = layer.getRevision();\n    var renderOrder = /** @type {import(\"../../render.js\").OrderFunction} */ (layer.getRenderOrder()) || null;\n\n    var replayState = tile.getReplayState(layer);\n    if (!replayState.dirty && replayState.renderedRevision == revision &&\n        replayState.renderedRenderOrder == renderOrder) {\n      return;\n    }\n\n    var source = /** @type {import(\"../../source/VectorTile.js\").default} */ (layer.getSource());\n    var sourceTileGrid = source.getTileGrid();\n    var tileGrid = source.getTileGridForProjection(projection);\n    var resolution = tileGrid.getResolution(tile.tileCoord[0]);\n    var tileExtent = tile.extent;\n\n    var loop = function ( t, tt ) {\n      var sourceTile = tile.getTile(tile.tileKeys[t]);\n      if (sourceTile.getState() != TileState.LOADED) {\n        return;\n      }\n\n      var sourceTileCoord = sourceTile.tileCoord;\n      var sourceTileExtent = sourceTileGrid.getTileCoordExtent(sourceTileCoord);\n      var sharedExtent = getIntersection(tileExtent, sourceTileExtent);\n      var bufferedExtent = equals(sourceTileExtent, sharedExtent) ? null :\n        buffer(sharedExtent, layer.getRenderBuffer() * resolution, this$1.tmpExtent);\n      var tileProjection = sourceTile.getProjection();\n      var reproject = false;\n      if (!equivalentProjection(projection, tileProjection)) {\n        reproject = true;\n        sourceTile.setProjection(projection);\n      }\n      replayState.dirty = false;\n      var replayGroup = new CanvasReplayGroup(0, sharedExtent, resolution,\n        pixelRatio, source.getOverlaps(), this$1.declutterTree_, layer.getRenderBuffer());\n      var squaredTolerance = getSquaredRenderTolerance(resolution, pixelRatio);\n\n      /**\n       * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n       * @this {CanvasVectorTileLayerRenderer}\n       */\n      var render = function(feature) {\n        var styles;\n        var styleFunction = feature.getStyleFunction() || layer.getStyleFunction();\n        if (styleFunction) {\n          styles = styleFunction(feature, resolution);\n        }\n        if (styles) {\n          var dirty = this.renderFeature(feature, squaredTolerance, styles, replayGroup);\n          this.dirty_ = this.dirty_ || dirty;\n          replayState.dirty = replayState.dirty || dirty;\n        }\n      };\n\n      var features = sourceTile.getFeatures();\n      if (renderOrder && renderOrder !== replayState.renderedRenderOrder) {\n        features.sort(renderOrder);\n      }\n      for (var i = 0, ii = features.length; i < ii; ++i) {\n        var feature = features[i];\n        if (reproject) {\n          if (tileProjection.getUnits() == Units.TILE_PIXELS) {\n            // projected tile extent\n            tileProjection.setWorldExtent(sourceTileExtent);\n            // tile extent in tile pixel space\n            tileProjection.setExtent(sourceTile.getExtent());\n          }\n          feature.getGeometry().transform(tileProjection, projection);\n        }\n        if (!bufferedExtent || intersects(bufferedExtent, feature.getGeometry().getExtent())) {\n          render.call(this$1, feature);\n        }\n      }\n      replayGroup.finish();\n      sourceTile.setReplayGroup(layer, tile.tileCoord.toString(), replayGroup);\n    };\n\n    for (var t = 0, tt = tile.tileKeys.length; t < tt; ++t) loop( t, tt );\n    replayState.renderedRevision = revision;\n    replayState.renderedRenderOrder = renderOrder;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasVectorTileLayerRenderer.prototype.forEachFeatureAtCoordinate = function forEachFeatureAtCoordinate (coordinate, frameState, hitTolerance, callback, thisArg) {\n    var resolution = frameState.viewState.resolution;\n    var rotation = frameState.viewState.rotation;\n    hitTolerance = hitTolerance == undefined ? 0 : hitTolerance;\n    var layer = this.getLayer();\n    /** @type {!Object<string, boolean>} */\n    var features = {};\n\n    var renderedTiles = /** @type {Array<import(\"../../VectorImageTile.js\").default>} */ (this.renderedTiles);\n\n    var bufferedExtent, found;\n    var i, ii;\n    for (i = 0, ii = renderedTiles.length; i < ii; ++i) {\n      var tile = renderedTiles[i];\n      bufferedExtent = buffer(tile.extent, hitTolerance * resolution, bufferedExtent);\n      if (!containsCoordinate(bufferedExtent, coordinate)) {\n        continue;\n      }\n      for (var t = 0, tt = tile.tileKeys.length; t < tt; ++t) {\n        var sourceTile = tile.getTile(tile.tileKeys[t]);\n        if (sourceTile.getState() != TileState.LOADED) {\n          continue;\n        }\n        var replayGroup = /** @type {CanvasReplayGroup} */ (sourceTile.getReplayGroup(layer,\n          tile.tileCoord.toString()));\n        found = found || replayGroup.forEachFeatureAtCoordinate(coordinate, resolution, rotation, hitTolerance, {},\n          /**\n           * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n           * @return {?} Callback result.\n           */\n          function(feature) {\n            var key = getUid(feature);\n            if (!(key in features)) {\n              features[key] = true;\n              return callback.call(thisArg, feature, layer);\n            }\n          }, null);\n      }\n    }\n    return found;\n  };\n\n  /**\n   * @param {import(\"../../VectorTile.js\").default} tile Tile.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @return {import(\"../../transform.js\").Transform} transform Transform.\n   * @private\n   */\n  CanvasVectorTileLayerRenderer.prototype.getReplayTransform_ = function getReplayTransform_ (tile, frameState) {\n    var layer = this.getLayer();\n    var source = /** @type {import(\"../../source/VectorTile.js\").default} */ (layer.getSource());\n    var tileGrid = source.getTileGrid();\n    var tileCoord = tile.tileCoord;\n    var tileResolution = tileGrid.getResolution(tileCoord[0]);\n    var viewState = frameState.viewState;\n    var pixelRatio = frameState.pixelRatio;\n    var renderResolution = viewState.resolution / pixelRatio;\n    var tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent);\n    var center = viewState.center;\n    var origin = getTopLeft(tileExtent);\n    var size = frameState.size;\n    var offsetX = Math.round(pixelRatio * size[0] / 2);\n    var offsetY = Math.round(pixelRatio * size[1] / 2);\n    return composeTransform(this.tmpTransform_,\n      offsetX, offsetY,\n      tileResolution / renderResolution, tileResolution / renderResolution,\n      viewState.rotation,\n      (origin[0] - center[0]) / tileResolution,\n      (center[1] - origin[1]) / tileResolution);\n  };\n\n  /**\n   * @param {import(\"../../events/Event.js\").default} event Event.\n   */\n  CanvasVectorTileLayerRenderer.prototype.handleFontsChanged_ = function handleFontsChanged_ (event) {\n    var layer = this.getLayer();\n    if (layer.getVisible() && this.renderedLayerRevision_ !== undefined) {\n      layer.changed();\n    }\n  };\n\n  /**\n   * Handle changes in image style state.\n   * @param {import(\"../../events/Event.js\").default} event Image style change event.\n   * @private\n   */\n  CanvasVectorTileLayerRenderer.prototype.handleStyleImageChange_ = function handleStyleImageChange_ (event) {\n    this.renderIfReadyAndVisible();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasVectorTileLayerRenderer.prototype.postCompose = function postCompose (context, frameState, layerState) {\n    var layer = /** @type {import(\"../../layer/Vector.js\").default} */ (this.getLayer());\n    var renderMode = layer.getRenderMode();\n    if (renderMode != VectorTileRenderType.IMAGE) {\n      var declutterReplays = layer.getDeclutter() ? {} : null;\n      var source = /** @type {import(\"../../source/VectorTile.js\").default} */ (layer.getSource());\n      var replayTypes = VECTOR_REPLAYS[renderMode];\n      var pixelRatio = frameState.pixelRatio;\n      var rotation = frameState.viewState.rotation;\n      var size = frameState.size;\n      var offsetX, offsetY;\n      if (rotation) {\n        offsetX = Math.round(pixelRatio * size[0] / 2);\n        offsetY = Math.round(pixelRatio * size[1] / 2);\n        rotateAtOffset(context, -rotation, offsetX, offsetY);\n      }\n      if (declutterReplays) {\n        this.declutterTree_.clear();\n      }\n      var viewHints = frameState.viewHints;\n      var snapToPixel = !(viewHints[ViewHint.ANIMATING] || viewHints[ViewHint.INTERACTING]);\n      var tiles = this.renderedTiles;\n      var tileGrid = source.getTileGridForProjection(frameState.viewState.projection);\n      var clips = [];\n      var zs = [];\n      for (var i = tiles.length - 1; i >= 0; --i) {\n        var tile = /** @type {import(\"../../VectorImageTile.js\").default} */ (tiles[i]);\n        if (tile.getState() == TileState.ABORT) {\n          continue;\n        }\n        var tileCoord = tile.tileCoord;\n        var worldOffset = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent)[0] - tile.extent[0];\n        var transform = undefined;\n        for (var t = 0, tt = tile.tileKeys.length; t < tt; ++t) {\n          var sourceTile = tile.getTile(tile.tileKeys[t]);\n          if (sourceTile.getState() != TileState.LOADED) {\n            continue;\n          }\n          var replayGroup = /** @type {CanvasReplayGroup} */ (sourceTile.getReplayGroup(layer, tileCoord.toString()));\n          if (!replayGroup || !replayGroup.hasReplays(replayTypes)) {\n            // sourceTile was not yet loaded when this.createReplayGroup_() was\n            // called, or it has no replays of the types we want to render\n            continue;\n          }\n          if (!transform) {\n            transform = this.getTransform(frameState, worldOffset);\n          }\n          var currentZ = sourceTile.tileCoord[0];\n          var currentClip = replayGroup.getClipCoords(transform);\n          context.save();\n          context.globalAlpha = layerState.opacity;\n          // Create a clip mask for regions in this low resolution tile that are\n          // already filled by a higher resolution tile\n          for (var j = 0, jj = clips.length; j < jj; ++j) {\n            var clip = clips[j];\n            if (currentZ < zs[j]) {\n              context.beginPath();\n              // counter-clockwise (outer ring) for current tile\n              context.moveTo(currentClip[0], currentClip[1]);\n              context.lineTo(currentClip[2], currentClip[3]);\n              context.lineTo(currentClip[4], currentClip[5]);\n              context.lineTo(currentClip[6], currentClip[7]);\n              // clockwise (inner ring) for higher resolution tile\n              context.moveTo(clip[6], clip[7]);\n              context.lineTo(clip[4], clip[5]);\n              context.lineTo(clip[2], clip[3]);\n              context.lineTo(clip[0], clip[1]);\n              context.clip();\n            }\n          }\n          replayGroup.replay(context, transform, rotation, {}, snapToPixel, replayTypes, declutterReplays);\n          context.restore();\n          clips.push(currentClip);\n          zs.push(currentZ);\n        }\n      }\n      if (declutterReplays) {\n        replayDeclutter(declutterReplays, context, rotation, snapToPixel);\n      }\n      if (rotation) {\n        rotateAtOffset(context, rotation,\n          /** @type {number} */ (offsetX), /** @type {number} */ (offsetY));\n      }\n    }\n    CanvasTileLayerRenderer.prototype.postCompose.call(this, context, frameState, layerState);\n  };\n\n  /**\n   * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n   * @param {number} squaredTolerance Squared tolerance.\n   * @param {import(\"../../style/Style.js\").default|Array<import(\"../../style/Style.js\").default>} styles The style or array of styles.\n   * @param {import(\"../../render/canvas/ReplayGroup.js\").default} replayGroup Replay group.\n   * @return {boolean} `true` if an image is loading.\n   */\n  CanvasVectorTileLayerRenderer.prototype.renderFeature = function renderFeature$1 (feature, squaredTolerance, styles, replayGroup) {\n    if (!styles) {\n      return false;\n    }\n    var loading = false;\n    if (Array.isArray(styles)) {\n      for (var i = 0, ii = styles.length; i < ii; ++i) {\n        loading = renderFeature(\n          replayGroup, feature, styles[i], squaredTolerance,\n          this.handleStyleImageChange_, this) || loading;\n      }\n    } else {\n      loading = renderFeature(\n        replayGroup, feature, styles, squaredTolerance,\n        this.handleStyleImageChange_, this);\n    }\n    return loading;\n  };\n\n  /**\n   * @param {import(\"../../VectorImageTile.js\").default} tile Tile.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../../proj/Projection.js\").default} projection Projection.\n   * @private\n   */\n  CanvasVectorTileLayerRenderer.prototype.renderTileImage_ = function renderTileImage_ (tile, pixelRatio, projection) {\n    var layer = /** @type {import(\"../../layer/Vector.js\").default} */ (this.getLayer());\n    var replayState = tile.getReplayState(layer);\n    var revision = layer.getRevision();\n    var replays = IMAGE_REPLAYS[layer.getRenderMode()];\n    if (replays && replayState.renderedTileRevision !== revision) {\n      replayState.renderedTileRevision = revision;\n      var tileCoord = tile.wrappedTileCoord;\n      var z = tileCoord[0];\n      var source = /** @type {import(\"../../source/VectorTile.js\").default} */ (layer.getSource());\n      var tileGrid = source.getTileGridForProjection(projection);\n      var resolution = tileGrid.getResolution(z);\n      var context = tile.getContext(layer);\n      var size = source.getTilePixelSize(z, pixelRatio, projection);\n      context.canvas.width = size[0];\n      context.canvas.height = size[1];\n      var tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent);\n      for (var i = 0, ii = tile.tileKeys.length; i < ii; ++i) {\n        var sourceTile = tile.getTile(tile.tileKeys[i]);\n        if (sourceTile.getState() != TileState.LOADED) {\n          continue;\n        }\n        var pixelScale = pixelRatio / resolution;\n        var transform = resetTransform(this.tmpTransform_);\n        scaleTransform(transform, pixelScale, -pixelScale);\n        translateTransform(transform, -tileExtent[0], -tileExtent[3]);\n        var replayGroup = /** @type {CanvasReplayGroup} */ (sourceTile.getReplayGroup(layer,\n          tile.tileCoord.toString()));\n        replayGroup.replay(context, transform, 0, {}, true, replays);\n      }\n    }\n  };\n\n  return CanvasVectorTileLayerRenderer;\n}(CanvasTileLayerRenderer));\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {import(\"../../layer/Layer.js\").default} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nCanvasVectorTileLayerRenderer['handles'] = function(layer) {\n  return layer.getType() === LayerType.VECTOR_TILE;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {import(\"../Map.js\").default} mapRenderer The map renderer.\n * @param {import(\"../../layer/Layer.js\").default} layer The layer to be rendererd.\n * @return {CanvasVectorTileLayerRenderer} The layer renderer.\n */\nCanvasVectorTileLayerRenderer['create'] = function(mapRenderer, layer) {\n  return new CanvasVectorTileLayerRenderer(/** @type {import(\"../../layer/VectorTile.js\").default} */ (layer));\n};\n\n\nexport default CanvasVectorTileLayerRenderer;\n\n//# sourceMappingURL=VectorTileLayer.js.map","/**\n * @module ol/Map\n */\nimport PluggableMap from './PluggableMap.js';\nimport {defaults as defaultControls} from './control/util.js';\nimport {defaults as defaultInteractions} from './interaction.js';\nimport {assign} from './obj.js';\nimport CanvasImageLayerRenderer from './renderer/canvas/ImageLayer.js';\nimport CanvasMapRenderer from './renderer/canvas/Map.js';\nimport CanvasTileLayerRenderer from './renderer/canvas/TileLayer.js';\nimport CanvasVectorLayerRenderer from './renderer/canvas/VectorLayer.js';\nimport CanvasVectorTileLayerRenderer from './renderer/canvas/VectorTileLayer.js';\n\n/**\n * @classdesc\n * The map is the core component of OpenLayers. For a map to render, a view,\n * one or more layers, and a target container are needed:\n *\n *     import Map from 'ol/Map';\n *     import View from 'ol/View';\n *     import TileLayer from 'ol/layer/Tile';\n *     import OSM from 'ol/source/OSM';\n *\n *     var map = new Map({\n *       view: new View({\n *         center: [0, 0],\n *         zoom: 1\n *       }),\n *       layers: [\n *         new TileLayer({\n *           source: new OSM()\n *         })\n *       ],\n *       target: 'map'\n *     });\n *\n * The above snippet creates a map using a {@link module:ol/layer/Tile} to\n * display {@link module:ol/source/OSM~OSM} OSM data and render it to a DOM\n * element with the id `map`.\n *\n * The constructor places a viewport container (with CSS class name\n * `ol-viewport`) in the target element (see `getViewport()`), and then two\n * further elements within the viewport: one with CSS class name\n * `ol-overlaycontainer-stopevent` for controls and some overlays, and one with\n * CSS class name `ol-overlaycontainer` for other overlays (see the `stopEvent`\n * option of {@link module:ol/Overlay~Overlay} for the difference). The map\n * itself is placed in a further element within the viewport.\n *\n * Layers are stored as a {@link module:ol/Collection~Collection} in\n * layerGroups. A top-level group is provided by the library. This is what is\n * accessed by `getLayerGroup` and `setLayerGroup`. Layers entered in the\n * options are added to this group, and `addLayer` and `removeLayer` change the\n * layer collection in the group. `getLayers` is a convenience function for\n * `getLayerGroup().getLayers()`. Note that {@link module:ol/layer/Group~Group}\n * is a subclass of {@link module:ol/layer/Base}, so layers entered in the\n * options or added with `addLayer` can be groups, which can contain further\n * groups, and so on.\n *\n * @fires import(\"./MapBrowserEvent.js\").MapBrowserEvent\n * @fires import(\"./MapEvent.js\").MapEvent\n * @fires module:ol/render/Event~RenderEvent#postcompose\n * @fires module:ol/render/Event~RenderEvent#precompose\n * @api\n */\nvar Map = /*@__PURE__*/(function (PluggableMap) {\n  function Map(options) {\n    options = assign({}, options);\n    if (!options.controls) {\n      options.controls = defaultControls();\n    }\n    if (!options.interactions) {\n      options.interactions = defaultInteractions();\n    }\n\n    PluggableMap.call(this, options);\n  }\n\n  if ( PluggableMap ) Map.__proto__ = PluggableMap;\n  Map.prototype = Object.create( PluggableMap && PluggableMap.prototype );\n  Map.prototype.constructor = Map;\n\n  Map.prototype.createRenderer = function createRenderer () {\n    var renderer = new CanvasMapRenderer(this);\n    renderer.registerLayerRenderers([\n      CanvasImageLayerRenderer,\n      CanvasTileLayerRenderer,\n      CanvasVectorLayerRenderer,\n      CanvasVectorTileLayerRenderer\n    ]);\n    return renderer;\n  };\n\n  return Map;\n}(PluggableMap));\n\n\nexport default Map;\n\n//# sourceMappingURL=Map.js.map","/**\n * @module ol/webgl\n */\n\n\n/**\n * Constants taken from goog.webgl\n */\n\n\n/**\n * @const\n * @type {number}\n */\nexport var ONE = 1;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var SRC_ALPHA = 0x0302;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var COLOR_ATTACHMENT0 = 0x8CE0;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var COLOR_BUFFER_BIT = 0x00004000;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var TRIANGLES = 0x0004;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var TRIANGLE_STRIP = 0x0005;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var ONE_MINUS_SRC_ALPHA = 0x0303;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var ARRAY_BUFFER = 0x8892;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var ELEMENT_ARRAY_BUFFER = 0x8893;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var STREAM_DRAW = 0x88E0;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var STATIC_DRAW = 0x88E4;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var DYNAMIC_DRAW = 0x88E8;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var CULL_FACE = 0x0B44;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var BLEND = 0x0BE2;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var STENCIL_TEST = 0x0B90;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var DEPTH_TEST = 0x0B71;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var SCISSOR_TEST = 0x0C11;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var UNSIGNED_BYTE = 0x1401;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var UNSIGNED_SHORT = 0x1403;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var UNSIGNED_INT = 0x1405;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var FLOAT = 0x1406;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var RGBA = 0x1908;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var FRAGMENT_SHADER = 0x8B30;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var VERTEX_SHADER = 0x8B31;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var LINK_STATUS = 0x8B82;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var LINEAR = 0x2601;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var TEXTURE_MAG_FILTER = 0x2800;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var TEXTURE_MIN_FILTER = 0x2801;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var TEXTURE_WRAP_S = 0x2802;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var TEXTURE_WRAP_T = 0x2803;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var TEXTURE_2D = 0x0DE1;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var TEXTURE0 = 0x84C0;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var CLAMP_TO_EDGE = 0x812F;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var COMPILE_STATUS = 0x8B81;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var FRAMEBUFFER = 0x8D40;\n\n\n/** end of goog.webgl constants\n */\n\n\n/**\n * @const\n * @type {Array<string>}\n */\nvar CONTEXT_IDS = [\n  'experimental-webgl',\n  'webgl',\n  'webkit-3d',\n  'moz-webgl'\n];\n\n\n/**\n * @param {HTMLCanvasElement} canvas Canvas.\n * @param {Object=} opt_attributes Attributes.\n * @return {WebGLRenderingContext} WebGL rendering context.\n */\nexport function getContext(canvas, opt_attributes) {\n  var ii = CONTEXT_IDS.length;\n  for (var i = 0; i < ii; ++i) {\n    try {\n      var context = canvas.getContext(CONTEXT_IDS[i], opt_attributes);\n      if (context) {\n        return /** @type {!WebGLRenderingContext} */ (context);\n      }\n    } catch (e) {\n      // pass\n    }\n  }\n  return null;\n}\n\n\n/**\n * Include debuggable shader sources.  Default is `true`. This should be set to\n * `false` for production builds.\n * @type {boolean}\n */\nexport var DEBUG = true;\n\n\n/**\n * The maximum supported WebGL texture size in pixels. If WebGL is not\n * supported, the value is set to `undefined`.\n * @type {number|undefined}\n */\nvar MAX_TEXTURE_SIZE; // value is set below\n\n\n/**\n * List of supported WebGL extensions.\n * @type {Array<string>}\n */\nvar EXTENSIONS; // value is set below\n\n\n/**\n * True if both OpenLayers and browser support WebGL.\n * @type {boolean}\n * @api\n */\nvar HAS = false;\n\n//TODO Remove side effects\nif (typeof window !== 'undefined' && 'WebGLRenderingContext' in window) {\n  try {\n    var canvas = /** @type {HTMLCanvasElement} */ (document.createElement('canvas'));\n    var gl = getContext(canvas, {failIfMajorPerformanceCaveat: true});\n    if (gl) {\n      HAS = true;\n      MAX_TEXTURE_SIZE = /** @type {number} */ (gl.getParameter(gl.MAX_TEXTURE_SIZE));\n      EXTENSIONS = gl.getSupportedExtensions();\n    }\n  } catch (e) {\n    // pass\n  }\n}\n\nexport {HAS, MAX_TEXTURE_SIZE, EXTENSIONS};\n\n//# sourceMappingURL=webgl.js.map","/**\n * @module ol/webgl/Shader\n */\nimport {abstract} from '../util.js';\n\n/**\n * @abstract\n */\nvar WebGLShader = function WebGLShader(source) {\n\n  /**\n   * @private\n   * @type {string}\n   */\n  this.source_ = source;\n\n};\n\n/**\n * @return {boolean} Is animated?\n */\nWebGLShader.prototype.isAnimated = function isAnimated () {\n  return false;\n};\n\n/**\n * @abstract\n * @return {number} Type.\n */\nWebGLShader.prototype.getType = function getType () {\n  return abstract();\n};\n\n/**\n * @return {string} Source.\n */\nWebGLShader.prototype.getSource = function getSource () {\n  return this.source_;\n};\n\n\nexport default WebGLShader;\n\n//# sourceMappingURL=Shader.js.map","/**\n * @module ol/webgl/Fragment\n */\n\nimport {FRAGMENT_SHADER} from '../webgl.js';\nimport WebGLShader from '../webgl/Shader.js';\n\nvar WebGLFragment = /*@__PURE__*/(function (WebGLShader) {\n  function WebGLFragment(source) {\n    WebGLShader.call(this, source);\n  }\n\n  if ( WebGLShader ) WebGLFragment.__proto__ = WebGLShader;\n  WebGLFragment.prototype = Object.create( WebGLShader && WebGLShader.prototype );\n  WebGLFragment.prototype.constructor = WebGLFragment;\n\n  /**\n   * @inheritDoc\n   */\n  WebGLFragment.prototype.getType = function getType () {\n    return FRAGMENT_SHADER;\n  };\n\n  return WebGLFragment;\n}(WebGLShader));\n\n\nexport default WebGLFragment;\n\n//# sourceMappingURL=Fragment.js.map","/**\n * @module ol/webgl/Vertex\n */\n\nimport {VERTEX_SHADER} from '../webgl.js';\nimport WebGLShader from '../webgl/Shader.js';\n\nvar WebGLVertex = /*@__PURE__*/(function (WebGLShader) {\n  function WebGLVertex(source) {\n    WebGLShader.call(this, source);\n  }\n\n  if ( WebGLShader ) WebGLVertex.__proto__ = WebGLShader;\n  WebGLVertex.prototype = Object.create( WebGLShader && WebGLShader.prototype );\n  WebGLVertex.prototype.constructor = WebGLVertex;\n\n  /**\n   * @inheritDoc\n   */\n  WebGLVertex.prototype.getType = function getType () {\n    return VERTEX_SHADER;\n  };\n\n  return WebGLVertex;\n}(WebGLShader));\n\n\nexport default WebGLVertex;\n\n//# sourceMappingURL=Vertex.js.map","/**\n * @module ol/render/webgl/circlereplay/defaultshader\n */\n// This file is automatically generated, do not edit.\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../webgl.js';\nimport WebGLFragment from '../../../webgl/Fragment.js';\nimport WebGLVertex from '../../../webgl/Vertex.js';\n\nexport var fragment = new WebGLFragment(DEBUG_WEBGL ?\n  'precision mediump float;\\nvarying vec2 v_center;\\nvarying vec2 v_offset;\\nvarying float v_halfWidth;\\nvarying float v_pixelRatio;\\n\\n\\n\\nuniform float u_opacity;\\nuniform vec4 u_fillColor;\\nuniform vec4 u_strokeColor;\\nuniform vec2 u_size;\\n\\nvoid main(void) {\\n  vec2 windowCenter = vec2((v_center.x + 1.0) / 2.0 * u_size.x * v_pixelRatio,\\n      (v_center.y + 1.0) / 2.0 * u_size.y * v_pixelRatio);\\n  vec2 windowOffset = vec2((v_offset.x + 1.0) / 2.0 * u_size.x * v_pixelRatio,\\n      (v_offset.y + 1.0) / 2.0 * u_size.y * v_pixelRatio);\\n  float radius = length(windowCenter - windowOffset);\\n  float dist = length(windowCenter - gl_FragCoord.xy);\\n  if (dist > radius + v_halfWidth) {\\n    if (u_strokeColor.a == 0.0) {\\n      gl_FragColor = u_fillColor;\\n    } else {\\n      gl_FragColor = u_strokeColor;\\n    }\\n    gl_FragColor.a = gl_FragColor.a - (dist - (radius + v_halfWidth));\\n  } else if (u_fillColor.a == 0.0) {\\n    // Hooray, no fill, just stroke. We can use real antialiasing.\\n    gl_FragColor = u_strokeColor;\\n    if (dist < radius - v_halfWidth) {\\n      gl_FragColor.a = gl_FragColor.a - (radius - v_halfWidth - dist);\\n    }\\n  } else {\\n    gl_FragColor = u_fillColor;\\n    float strokeDist = radius - v_halfWidth;\\n    float antialias = 2.0 * v_pixelRatio;\\n    if (dist > strokeDist) {\\n      gl_FragColor = u_strokeColor;\\n    } else if (dist >= strokeDist - antialias) {\\n      float step = smoothstep(strokeDist - antialias, strokeDist, dist);\\n      gl_FragColor = mix(u_fillColor, u_strokeColor, step);\\n    }\\n  }\\n  gl_FragColor.a = gl_FragColor.a * u_opacity;\\n  if (gl_FragColor.a <= 0.0) {\\n    discard;\\n  }\\n}\\n' :\n  'precision mediump float;varying vec2 a;varying vec2 b;varying float c;varying float d;uniform float m;uniform vec4 n;uniform vec4 o;uniform vec2 p;void main(void){vec2 windowCenter=vec2((a.x+1.0)/2.0*p.x*d,(a.y+1.0)/2.0*p.y*d);vec2 windowOffset=vec2((b.x+1.0)/2.0*p.x*d,(b.y+1.0)/2.0*p.y*d);float radius=length(windowCenter-windowOffset);float dist=length(windowCenter-gl_FragCoord.xy);if(dist>radius+c){if(o.a==0.0){gl_FragColor=n;}else{gl_FragColor=o;}gl_FragColor.a=gl_FragColor.a-(dist-(radius+c));}else if(n.a==0.0){gl_FragColor=o;if(dist<radius-c){gl_FragColor.a=gl_FragColor.a-(radius-c-dist);}} else{gl_FragColor=n;float strokeDist=radius-c;float antialias=2.0*d;if(dist>strokeDist){gl_FragColor=o;}else if(dist>=strokeDist-antialias){float step=smoothstep(strokeDist-antialias,strokeDist,dist);gl_FragColor=mix(n,o,step);}} gl_FragColor.a=gl_FragColor.a*m;if(gl_FragColor.a<=0.0){discard;}}');\n\nexport var vertex = new WebGLVertex(DEBUG_WEBGL ?\n  'varying vec2 v_center;\\nvarying vec2 v_offset;\\nvarying float v_halfWidth;\\nvarying float v_pixelRatio;\\n\\n\\nattribute vec2 a_position;\\nattribute float a_instruction;\\nattribute float a_radius;\\n\\nuniform mat4 u_projectionMatrix;\\nuniform mat4 u_offsetScaleMatrix;\\nuniform mat4 u_offsetRotateMatrix;\\nuniform float u_lineWidth;\\nuniform float u_pixelRatio;\\n\\nvoid main(void) {\\n  mat4 offsetMatrix = u_offsetScaleMatrix * u_offsetRotateMatrix;\\n  v_center = vec4(u_projectionMatrix * vec4(a_position, 0.0, 1.0)).xy;\\n  v_pixelRatio = u_pixelRatio;\\n  float lineWidth = u_lineWidth * u_pixelRatio;\\n  v_halfWidth = lineWidth / 2.0;\\n  if (lineWidth == 0.0) {\\n    lineWidth = 2.0 * u_pixelRatio;\\n  }\\n  vec2 offset;\\n  // Radius with anitaliasing (roughly).\\n  float radius = a_radius + 3.0 * u_pixelRatio;\\n  // Until we get gl_VertexID in WebGL, we store an instruction.\\n  if (a_instruction == 0.0) {\\n    // Offsetting the edges of the triangle by lineWidth / 2 is necessary, however\\n    // we should also leave some space for the antialiasing, thus we offset by lineWidth.\\n    offset = vec2(-1.0, 1.0);\\n  } else if (a_instruction == 1.0) {\\n    offset = vec2(-1.0, -1.0);\\n  } else if (a_instruction == 2.0) {\\n    offset = vec2(1.0, -1.0);\\n  } else {\\n    offset = vec2(1.0, 1.0);\\n  }\\n\\n  gl_Position = u_projectionMatrix * vec4(a_position + offset * radius, 0.0, 1.0) +\\n      offsetMatrix * vec4(offset * lineWidth, 0.0, 0.0);\\n  v_offset = vec4(u_projectionMatrix * vec4(a_position.x + a_radius, a_position.y,\\n      0.0, 1.0)).xy;\\n\\n  if (distance(v_center, v_offset) > 20000.0) {\\n    gl_Position = vec4(v_center, 0.0, 1.0);\\n  }\\n}\\n\\n\\n' :\n  'varying vec2 a;varying vec2 b;varying float c;varying float d;attribute vec2 e;attribute float f;attribute float g;uniform mat4 h;uniform mat4 i;uniform mat4 j;uniform float k;uniform float l;void main(void){mat4 offsetMatrix=i*j;a=vec4(h*vec4(e,0.0,1.0)).xy;d=l;float lineWidth=k*l;c=lineWidth/2.0;if(lineWidth==0.0){lineWidth=2.0*l;}vec2 offset;float radius=g+3.0*l;if(f==0.0){offset=vec2(-1.0,1.0);}else if(f==1.0){offset=vec2(-1.0,-1.0);}else if(f==2.0){offset=vec2(1.0,-1.0);}else{offset=vec2(1.0,1.0);}gl_Position=h*vec4(e+offset*radius,0.0,1.0)+offsetMatrix*vec4(offset*lineWidth,0.0,0.0);b=vec4(h*vec4(e.x+g,e.y,0.0,1.0)).xy;if(distance(a,b)>20000.0){gl_Position=vec4(a,0.0,1.0);}}');\n\n//# sourceMappingURL=defaultshader.js.map","/**\n * @module ol/render/webgl/circlereplay/defaultshader/Locations\n */\n// This file is automatically generated, do not edit\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../../webgl.js';\n\nvar Locations = function Locations(gl, program) {\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_projectionMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_projectionMatrix' : 'h');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_offsetScaleMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_offsetScaleMatrix' : 'i');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_offsetRotateMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_offsetRotateMatrix' : 'j');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_lineWidth = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_lineWidth' : 'k');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_pixelRatio = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_pixelRatio' : 'l');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_opacity = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_opacity' : 'm');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_fillColor = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_fillColor' : 'n');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_strokeColor = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_strokeColor' : 'o');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_size = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_size' : 'p');\n\n  /**\n   * @type {number}\n   */\n  this.a_position = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_position' : 'e');\n\n  /**\n   * @type {number}\n   */\n  this.a_instruction = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_instruction' : 'f');\n\n  /**\n   * @type {number}\n   */\n  this.a_radius = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_radius' : 'g');\n\n};\n\nexport default Locations;\n\n//# sourceMappingURL=Locations.js.map","/**\n * @module ol/vec/mat4\n */\n\n\n/**\n * @return {Array<number>} 4x4 matrix representing a 3D identity transform.\n */\nexport function create() {\n  return [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1];\n}\n\n\n/**\n * @param {Array<number>} mat4 Flattened 4x4 matrix receiving the result.\n * @param {import(\"../transform.js\").Transform} transform Transformation matrix.\n * @return {Array<number>} 2D transformation matrix as flattened 4x4 matrix.\n */\nexport function fromTransform(mat4, transform) {\n  mat4[0] = transform[0];\n  mat4[1] = transform[1];\n  mat4[4] = transform[2];\n  mat4[5] = transform[3];\n  mat4[12] = transform[4];\n  mat4[13] = transform[5];\n  return mat4;\n}\n\n//# sourceMappingURL=mat4.js.map","/**\n * @module ol/render/webgl/Replay\n */\nimport {abstract} from '../../util.js';\nimport {getCenter} from '../../extent.js';\nimport VectorContext from '../VectorContext.js';\nimport {\n  create as createTransform,\n  reset as resetTransform,\n  rotate as rotateTransform,\n  scale as scaleTransform,\n  translate as translateTransform\n} from '../../transform.js';\nimport {create, fromTransform} from '../../vec/mat4.js';\nimport {ARRAY_BUFFER, ELEMENT_ARRAY_BUFFER, TRIANGLES,\n  UNSIGNED_INT, UNSIGNED_SHORT} from '../../webgl.js';\n\nvar WebGLReplay = /*@__PURE__*/(function (VectorContext) {\n  function WebGLReplay(tolerance, maxExtent) {\n    VectorContext.call(this);\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.tolerance = tolerance;\n\n    /**\n     * @protected\n     * @const\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.maxExtent = maxExtent;\n\n    /**\n     * The origin of the coordinate system for the point coordinates sent to\n     * the GPU. To eliminate jitter caused by precision problems in the GPU\n     * we use the \"Rendering Relative to Eye\" technique described in the \"3D\n     * Engine Design for Virtual Globes\" book.\n     * @protected\n     * @type {import(\"../../coordinate.js\").Coordinate}\n     */\n    this.origin = getCenter(maxExtent);\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.projectionMatrix_ = createTransform();\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.offsetRotateMatrix_ = createTransform();\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.offsetScaleMatrix_ = createTransform();\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.tmpMat4_ = create();\n\n    /**\n     * @protected\n     * @type {Array<number>}\n     */\n    this.indices = [];\n\n    /**\n     * @protected\n     * @type {?import(\"../../webgl/Buffer.js\").default}\n     */\n    this.indicesBuffer = null;\n\n    /**\n     * Start index per feature (the index).\n     * @protected\n     * @type {Array<number>}\n     */\n    this.startIndices = [];\n\n    /**\n     * Start index per feature (the feature).\n     * @protected\n     * @type {Array<import(\"../../Feature.js\").default|import(\"../Feature.js\").default>}\n     */\n    this.startIndicesFeature = [];\n\n    /**\n     * @protected\n     * @type {Array<number>}\n     */\n    this.vertices = [];\n\n    /**\n     * @protected\n     * @type {?import(\"../../webgl/Buffer.js\").default}\n     */\n    this.verticesBuffer = null;\n\n    /**\n     * Optional parameter for PolygonReplay instances.\n     * @protected\n     * @type {import(\"./LineStringReplay.js\").default|undefined}\n     */\n    this.lineStringReplay = undefined;\n\n  }\n\n  if ( VectorContext ) WebGLReplay.__proto__ = VectorContext;\n  WebGLReplay.prototype = Object.create( VectorContext && VectorContext.prototype );\n  WebGLReplay.prototype.constructor = WebGLReplay;\n\n  /**\n   * @abstract\n   * @param {import(\"../../webgl/Context.js\").default} context WebGL context.\n   * @return {function()} Delete resources function.\n   */\n  WebGLReplay.prototype.getDeleteResourcesFunction = function getDeleteResourcesFunction (context) {\n    return abstract();\n  };\n\n  /**\n   * @abstract\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   */\n  WebGLReplay.prototype.finish = function finish (context) {\n    abstract();\n  };\n\n  /**\n   * @abstract\n   * @protected\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {import(\"../../size.js\").Size} size Size.\n   * @param {number} pixelRatio Pixel ratio.\n   * @return {import(\"./circlereplay/defaultshader/Locations.js\").default|\n     import(\"./linestringreplay/defaultshader/Locations.js\").default|\n     import(\"./polygonreplay/defaultshader/Locations.js\").default|\n     import(\"./texturereplay/defaultshader/Locations.js\").default} Locations.\n   */\n  WebGLReplay.prototype.setUpProgram = function setUpProgram (gl, context, size, pixelRatio) {\n    return abstract();\n  };\n\n  /**\n   * @abstract\n   * @protected\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"./circlereplay/defaultshader/Locations.js\").default|\n     import(\"./linestringreplay/defaultshader/Locations.js\").default|\n     import(\"./polygonreplay/defaultshader/Locations.js\").default|\n     import(\"./texturereplay/defaultshader/Locations.js\").default} locations Locations.\n   */\n  WebGLReplay.prototype.shutDownProgram = function shutDownProgram (gl, locations) {\n    abstract();\n  };\n\n  /**\n   * @abstract\n   * @protected\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   * @param {boolean} hitDetection Hit detection mode.\n   */\n  WebGLReplay.prototype.drawReplay = function drawReplay (gl, context, skippedFeaturesHash, hitDetection) {\n    abstract();\n  };\n\n  /**\n   * @abstract\n   * @protected\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   * @param {function((import(\"../../Feature.js\").default|import(\"../Feature.js\").default)): T|undefined} featureCallback Feature callback.\n   * @param {import(\"../../extent.js\").Extent=} opt_hitExtent Hit extent: Only features intersecting this extent are checked.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  WebGLReplay.prototype.drawHitDetectionReplayOneByOne = function drawHitDetectionReplayOneByOne (gl, context, skippedFeaturesHash, featureCallback, opt_hitExtent) {\n    return abstract();\n  };\n\n  /**\n   * @protected\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   * @param {function((import(\"../../Feature.js\").default|import(\"../Feature.js\").default)): T|undefined} featureCallback Feature callback.\n   * @param {boolean} oneByOne Draw features one-by-one for the hit-detecion.\n   * @param {import(\"../../extent.js\").Extent=} opt_hitExtent Hit extent: Only features intersecting this extent are checked.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  WebGLReplay.prototype.drawHitDetectionReplay = function drawHitDetectionReplay (gl, context, skippedFeaturesHash, featureCallback, oneByOne, opt_hitExtent) {\n    if (!oneByOne) {\n      // draw all hit-detection features in \"once\" (by texture group)\n      return this.drawHitDetectionReplayAll(gl, context,\n        skippedFeaturesHash, featureCallback);\n    } else {\n      // draw hit-detection features one by one\n      return this.drawHitDetectionReplayOneByOne(gl, context,\n        skippedFeaturesHash, featureCallback, opt_hitExtent);\n    }\n  };\n\n  /**\n   * @protected\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   * @param {function((import(\"../../Feature.js\").default|import(\"../Feature.js\").default)): T|undefined} featureCallback Feature callback.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  WebGLReplay.prototype.drawHitDetectionReplayAll = function drawHitDetectionReplayAll (gl, context, skippedFeaturesHash, featureCallback) {\n    gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);\n    this.drawReplay(gl, context, skippedFeaturesHash, true);\n\n    var result = featureCallback(null);\n    if (result) {\n      return result;\n    } else {\n      return undefined;\n    }\n  };\n\n  /**\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {import(\"../../coordinate.js\").Coordinate} center Center.\n   * @param {number} resolution Resolution.\n   * @param {number} rotation Rotation.\n   * @param {import(\"../../size.js\").Size} size Size.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {number} opacity Global opacity.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   * @param {function((import(\"../../Feature.js\").default|import(\"../Feature.js\").default)): T|undefined} featureCallback Feature callback.\n   * @param {boolean} oneByOne Draw features one-by-one for the hit-detecion.\n   * @param {import(\"../../extent.js\").Extent=} opt_hitExtent Hit extent: Only features intersecting this extent are checked.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  WebGLReplay.prototype.replay = function replay (\n    context,\n    center,\n    resolution,\n    rotation,\n    size,\n    pixelRatio,\n    opacity,\n    skippedFeaturesHash,\n    featureCallback,\n    oneByOne,\n    opt_hitExtent\n  ) {\n    var gl = context.getGL();\n    var tmpStencil, tmpStencilFunc, tmpStencilMaskVal, tmpStencilRef, tmpStencilMask,\n        tmpStencilOpFail, tmpStencilOpPass, tmpStencilOpZFail;\n\n    if (this.lineStringReplay) {\n      tmpStencil = gl.isEnabled(gl.STENCIL_TEST);\n      tmpStencilFunc = gl.getParameter(gl.STENCIL_FUNC);\n      tmpStencilMaskVal = gl.getParameter(gl.STENCIL_VALUE_MASK);\n      tmpStencilRef = gl.getParameter(gl.STENCIL_REF);\n      tmpStencilMask = gl.getParameter(gl.STENCIL_WRITEMASK);\n      tmpStencilOpFail = gl.getParameter(gl.STENCIL_FAIL);\n      tmpStencilOpPass = gl.getParameter(gl.STENCIL_PASS_DEPTH_PASS);\n      tmpStencilOpZFail = gl.getParameter(gl.STENCIL_PASS_DEPTH_FAIL);\n\n      gl.enable(gl.STENCIL_TEST);\n      gl.clear(gl.STENCIL_BUFFER_BIT);\n      gl.stencilMask(255);\n      gl.stencilFunc(gl.ALWAYS, 1, 255);\n      gl.stencilOp(gl.KEEP, gl.KEEP, gl.REPLACE);\n\n      this.lineStringReplay.replay(context,\n        center, resolution, rotation, size, pixelRatio,\n        opacity, skippedFeaturesHash,\n        featureCallback, oneByOne, opt_hitExtent);\n\n      gl.stencilMask(0);\n      gl.stencilFunc(gl.NOTEQUAL, 1, 255);\n    }\n\n    context.bindBuffer(ARRAY_BUFFER, this.verticesBuffer);\n\n    context.bindBuffer(ELEMENT_ARRAY_BUFFER, this.indicesBuffer);\n\n    var locations = this.setUpProgram(gl, context, size, pixelRatio);\n\n    // set the \"uniform\" values\n    var projectionMatrix = resetTransform(this.projectionMatrix_);\n    scaleTransform(projectionMatrix, 2 / (resolution * size[0]), 2 / (resolution * size[1]));\n    rotateTransform(projectionMatrix, -rotation);\n    translateTransform(projectionMatrix, -(center[0] - this.origin[0]), -(center[1] - this.origin[1]));\n\n    var offsetScaleMatrix = resetTransform(this.offsetScaleMatrix_);\n    scaleTransform(offsetScaleMatrix, 2 / size[0], 2 / size[1]);\n\n    var offsetRotateMatrix = resetTransform(this.offsetRotateMatrix_);\n    if (rotation !== 0) {\n      rotateTransform(offsetRotateMatrix, -rotation);\n    }\n\n    gl.uniformMatrix4fv(locations.u_projectionMatrix, false,\n      fromTransform(this.tmpMat4_, projectionMatrix));\n    gl.uniformMatrix4fv(locations.u_offsetScaleMatrix, false,\n      fromTransform(this.tmpMat4_, offsetScaleMatrix));\n    gl.uniformMatrix4fv(locations.u_offsetRotateMatrix, false,\n      fromTransform(this.tmpMat4_, offsetRotateMatrix));\n    gl.uniform1f(locations.u_opacity, opacity);\n\n    // draw!\n    var result;\n    if (featureCallback === undefined) {\n      this.drawReplay(gl, context, skippedFeaturesHash, false);\n    } else {\n      // draw feature by feature for the hit-detection\n      result = this.drawHitDetectionReplay(gl, context, skippedFeaturesHash,\n        featureCallback, oneByOne, opt_hitExtent);\n    }\n\n    // disable the vertex attrib arrays\n    this.shutDownProgram(gl, locations);\n\n    if (this.lineStringReplay) {\n      if (!tmpStencil) {\n        gl.disable(gl.STENCIL_TEST);\n      }\n      gl.clear(gl.STENCIL_BUFFER_BIT);\n      gl.stencilFunc(/** @type {number} */ (tmpStencilFunc),\n        /** @type {number} */ (tmpStencilRef), /** @type {number} */ (tmpStencilMaskVal));\n      gl.stencilMask(/** @type {number} */ (tmpStencilMask));\n      gl.stencilOp(/** @type {number} */ (tmpStencilOpFail),\n        /** @type {number} */ (tmpStencilOpZFail), /** @type {number} */ (tmpStencilOpPass));\n    }\n\n    return result;\n  };\n\n  /**\n   * @protected\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {number} start Start index.\n   * @param {number} end End index.\n   */\n  WebGLReplay.prototype.drawElements = function drawElements (gl, context, start, end) {\n    var elementType = context.hasOESElementIndexUint ?\n      UNSIGNED_INT : UNSIGNED_SHORT;\n    var elementSize = context.hasOESElementIndexUint ? 4 : 2;\n\n    var numItems = end - start;\n    var offsetInBytes = start * elementSize;\n    gl.drawElements(TRIANGLES, numItems, elementType, offsetInBytes);\n  };\n\n  return WebGLReplay;\n}(VectorContext));\n\n\nexport default WebGLReplay;\n\n//# sourceMappingURL=Replay.js.map","/**\n * @module ol/render/webgl\n */\n\n\n/**\n * @const\n * @type {string}\n */\nexport var DEFAULT_FONT = '10px sans-serif';\n\n\n/**\n * @const\n * @type {import(\"../color.js\").Color}\n */\nexport var DEFAULT_FILLSTYLE = [0.0, 0.0, 0.0, 1.0];\n\n\n/**\n * @const\n * @type {string}\n */\nexport var DEFAULT_LINECAP = 'round';\n\n\n/**\n * @const\n * @type {Array<number>}\n */\nexport var DEFAULT_LINEDASH = [];\n\n\n/**\n * @const\n * @type {number}\n */\nexport var DEFAULT_LINEDASHOFFSET = 0;\n\n\n/**\n * @const\n * @type {string}\n */\nexport var DEFAULT_LINEJOIN = 'round';\n\n\n/**\n * @const\n * @type {number}\n */\nexport var DEFAULT_MITERLIMIT = 10;\n\n/**\n * @const\n * @type {import(\"../color.js\").Color}\n */\nexport var DEFAULT_STROKESTYLE = [0.0, 0.0, 0.0, 1.0];\n\n\n/**\n * @const\n * @type {number}\n */\nexport var DEFAULT_TEXTALIGN = 0.5;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var DEFAULT_TEXTBASELINE = 0.5;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var DEFAULT_LINEWIDTH = 1;\n\n/**\n * @const\n * @type {number}\n */\nexport var EPSILON = Number.EPSILON || 2.220446049250313e-16;\n\n/**\n * Calculates the orientation of a triangle based on the determinant method.\n * @param {number} x1 First X coordinate.\n * @param {number} y1 First Y coordinate.\n * @param {number} x2 Second X coordinate.\n * @param {number} y2 Second Y coordinate.\n * @param {number} x3 Third X coordinate.\n * @param {number} y3 Third Y coordinate.\n * @return {boolean|undefined} Triangle is clockwise.\n */\nexport var triangleIsCounterClockwise = function(x1, y1, x2, y2, x3, y3) {\n  var area = (x2 - x1) * (y3 - y1) - (x3 - x1) * (y2 - y1);\n  return (area <= EPSILON && area >= -EPSILON) ?\n    undefined : area > 0;\n};\n\n\n//# sourceMappingURL=webgl.js.map","/**\n * @module ol/webgl/Buffer\n */\nimport {STATIC_DRAW, STREAM_DRAW, DYNAMIC_DRAW} from '../webgl.js';\n\n/**\n * @enum {number}\n */\nvar BufferUsage = {\n  STATIC_DRAW: STATIC_DRAW,\n  STREAM_DRAW: STREAM_DRAW,\n  DYNAMIC_DRAW: DYNAMIC_DRAW\n};\n\n\nvar WebGLBuffer = function WebGLBuffer(opt_arr, opt_usage) {\n\n  /**\n   * @private\n   * @type {Array<number>}\n   */\n  this.arr_ = opt_arr !== undefined ? opt_arr : [];\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.usage_ = opt_usage !== undefined ? opt_usage : BufferUsage.STATIC_DRAW;\n\n};\n\n/**\n * @return {Array<number>} Array.\n */\nWebGLBuffer.prototype.getArray = function getArray () {\n  return this.arr_;\n};\n\n/**\n * @return {number} Usage.\n */\nWebGLBuffer.prototype.getUsage = function getUsage () {\n  return this.usage_;\n};\n\nexport default WebGLBuffer;\n\n//# sourceMappingURL=Buffer.js.map","/**\n * @module ol/render/webgl/CircleReplay\n */\nimport {getUid} from '../../util.js';\nimport {equals} from '../../array.js';\nimport {asArray} from '../../color.js';\nimport {intersects} from '../../extent.js';\nimport {isEmpty} from '../../obj.js';\nimport {translate} from '../../geom/flat/transform.js';\nimport {fragment, vertex} from './circlereplay/defaultshader.js';\nimport Locations from './circlereplay/defaultshader/Locations.js';\nimport WebGLReplay from './Replay.js';\nimport {DEFAULT_LINEDASH, DEFAULT_LINEDASHOFFSET, DEFAULT_STROKESTYLE,\n  DEFAULT_FILLSTYLE, DEFAULT_LINEWIDTH} from '../webgl.js';\nimport {FLOAT} from '../../webgl.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\n\nvar WebGLCircleReplay = /*@__PURE__*/(function (WebGLReplay) {\n  function WebGLCircleReplay(tolerance, maxExtent) {\n    WebGLReplay.call(this, tolerance, maxExtent);\n\n    /**\n     * @private\n     * @type {import(\"./circlereplay/defaultshader/Locations.js\").default}\n     */\n    this.defaultLocations_ = null;\n\n    /**\n     * @private\n     * @type {Array<Array<Array<number>|number>>}\n     */\n    this.styles_ = [];\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.styleIndices_ = [];\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.radius_ = 0;\n\n    /**\n     * @private\n     * @type {{fillColor: (Array<number>|null),\n     *         strokeColor: (Array<number>|null),\n     *         lineDash: Array<number>,\n     *         lineDashOffset: (number|undefined),\n     *         lineWidth: (number|undefined),\n     *         changed: boolean}|null}\n     */\n    this.state_ = {\n      fillColor: null,\n      strokeColor: null,\n      lineDash: null,\n      lineDashOffset: undefined,\n      lineWidth: undefined,\n      changed: false\n    };\n\n  }\n\n  if ( WebGLReplay ) WebGLCircleReplay.__proto__ = WebGLReplay;\n  WebGLCircleReplay.prototype = Object.create( WebGLReplay && WebGLReplay.prototype );\n  WebGLCircleReplay.prototype.constructor = WebGLCircleReplay;\n\n  /**\n   * @private\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   */\n  WebGLCircleReplay.prototype.drawCoordinates_ = function drawCoordinates_ (flatCoordinates, offset, end, stride) {\n    var numVertices = this.vertices.length;\n    var numIndices = this.indices.length;\n    var n = numVertices / 4;\n    var i, ii;\n    for (i = offset, ii = end; i < ii; i += stride) {\n      this.vertices[numVertices++] = flatCoordinates[i];\n      this.vertices[numVertices++] = flatCoordinates[i + 1];\n      this.vertices[numVertices++] = 0;\n      this.vertices[numVertices++] = this.radius_;\n\n      this.vertices[numVertices++] = flatCoordinates[i];\n      this.vertices[numVertices++] = flatCoordinates[i + 1];\n      this.vertices[numVertices++] = 1;\n      this.vertices[numVertices++] = this.radius_;\n\n      this.vertices[numVertices++] = flatCoordinates[i];\n      this.vertices[numVertices++] = flatCoordinates[i + 1];\n      this.vertices[numVertices++] = 2;\n      this.vertices[numVertices++] = this.radius_;\n\n      this.vertices[numVertices++] = flatCoordinates[i];\n      this.vertices[numVertices++] = flatCoordinates[i + 1];\n      this.vertices[numVertices++] = 3;\n      this.vertices[numVertices++] = this.radius_;\n\n      this.indices[numIndices++] = n;\n      this.indices[numIndices++] = n + 1;\n      this.indices[numIndices++] = n + 2;\n\n      this.indices[numIndices++] = n + 2;\n      this.indices[numIndices++] = n + 3;\n      this.indices[numIndices++] = n;\n\n      n += 4;\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLCircleReplay.prototype.drawCircle = function drawCircle (circleGeometry, feature) {\n    var radius = circleGeometry.getRadius();\n    var stride = circleGeometry.getStride();\n    if (radius) {\n      this.startIndices.push(this.indices.length);\n      this.startIndicesFeature.push(feature);\n      if (this.state_.changed) {\n        this.styleIndices_.push(this.indices.length);\n        this.state_.changed = false;\n      }\n\n      this.radius_ = radius;\n      var flatCoordinates = circleGeometry.getFlatCoordinates();\n      flatCoordinates = translate(flatCoordinates, 0, 2,\n        stride, -this.origin[0], -this.origin[1]);\n      this.drawCoordinates_(flatCoordinates, 0, 2, stride);\n    } else {\n      if (this.state_.changed) {\n        this.styles_.pop();\n        if (this.styles_.length) {\n          var lastState = this.styles_[this.styles_.length - 1];\n          this.state_.fillColor = /** @type {Array<number>} */ (lastState[0]);\n          this.state_.strokeColor = /** @type {Array<number>} */ (lastState[1]);\n          this.state_.lineWidth = /** @type {number} */ (lastState[2]);\n          this.state_.changed = false;\n        }\n      }\n    }\n  };\n\n  /**\n   * @inheritDoc\n   **/\n  WebGLCircleReplay.prototype.finish = function finish (context) {\n    // create, bind, and populate the vertices buffer\n    this.verticesBuffer = new WebGLBuffer(this.vertices);\n\n    // create, bind, and populate the indices buffer\n    this.indicesBuffer = new WebGLBuffer(this.indices);\n\n    this.startIndices.push(this.indices.length);\n\n    //Clean up, if there is nothing to draw\n    if (this.styleIndices_.length === 0 && this.styles_.length > 0) {\n      this.styles_ = [];\n    }\n\n    this.vertices = null;\n    this.indices = null;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLCircleReplay.prototype.getDeleteResourcesFunction = function getDeleteResourcesFunction (context) {\n    // We only delete our stuff here. The shaders and the program may\n    // be used by other CircleReplay instances (for other layers). And\n    // they will be deleted when disposing of the import(\"../../webgl/Context.js\").WebGLContext\n    // object.\n    var verticesBuffer = this.verticesBuffer;\n    var indicesBuffer = this.indicesBuffer;\n    return function() {\n      context.deleteBuffer(verticesBuffer);\n      context.deleteBuffer(indicesBuffer);\n    };\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLCircleReplay.prototype.setUpProgram = function setUpProgram (gl, context, size, pixelRatio) {\n    // get the program\n    var program = context.getProgram(fragment, vertex);\n\n    // get the locations\n    var locations;\n    if (!this.defaultLocations_) {\n      locations = new Locations(gl, program);\n      this.defaultLocations_ = locations;\n    } else {\n      locations = this.defaultLocations_;\n    }\n\n    context.useProgram(program);\n\n    // enable the vertex attrib arrays\n    gl.enableVertexAttribArray(locations.a_position);\n    gl.vertexAttribPointer(locations.a_position, 2, FLOAT,\n      false, 16, 0);\n\n    gl.enableVertexAttribArray(locations.a_instruction);\n    gl.vertexAttribPointer(locations.a_instruction, 1, FLOAT,\n      false, 16, 8);\n\n    gl.enableVertexAttribArray(locations.a_radius);\n    gl.vertexAttribPointer(locations.a_radius, 1, FLOAT,\n      false, 16, 12);\n\n    // Enable renderer specific uniforms.\n    gl.uniform2fv(locations.u_size, size);\n    gl.uniform1f(locations.u_pixelRatio, pixelRatio);\n\n    return locations;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLCircleReplay.prototype.shutDownProgram = function shutDownProgram (gl, locations) {\n    gl.disableVertexAttribArray(locations.a_position);\n    gl.disableVertexAttribArray(locations.a_instruction);\n    gl.disableVertexAttribArray(locations.a_radius);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLCircleReplay.prototype.drawReplay = function drawReplay (gl, context, skippedFeaturesHash, hitDetection) {\n    if (!isEmpty(skippedFeaturesHash)) {\n      this.drawReplaySkipping_(gl, context, skippedFeaturesHash);\n    } else {\n      //Draw by style groups to minimize drawElements() calls.\n      var i, start, end, nextStyle;\n      end = this.startIndices[this.startIndices.length - 1];\n      for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n        start = this.styleIndices_[i];\n        nextStyle = this.styles_[i];\n        this.setFillStyle_(gl, /** @type {Array<number>} */ (nextStyle[0]));\n        this.setStrokeStyle_(gl, /** @type {Array<number>} */ (nextStyle[1]),\n          /** @type {number} */ (nextStyle[2]));\n        this.drawElements(gl, context, start, end);\n        end = start;\n      }\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLCircleReplay.prototype.drawHitDetectionReplayOneByOne = function drawHitDetectionReplayOneByOne (gl, context, skippedFeaturesHash, featureCallback, opt_hitExtent) {\n    var i, start, end, nextStyle, groupStart, feature, featureIndex;\n    featureIndex = this.startIndices.length - 2;\n    end = this.startIndices[featureIndex + 1];\n    for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n      nextStyle = this.styles_[i];\n      this.setFillStyle_(gl, /** @type {Array<number>} */ (nextStyle[0]));\n      this.setStrokeStyle_(gl, /** @type {Array<number>} */ (nextStyle[1]),\n        /** @type {number} */ (nextStyle[2]));\n      groupStart = this.styleIndices_[i];\n\n      while (featureIndex >= 0 &&\n          this.startIndices[featureIndex] >= groupStart) {\n        start = this.startIndices[featureIndex];\n        feature = this.startIndicesFeature[featureIndex];\n\n        if (skippedFeaturesHash[getUid(feature)] === undefined &&\n            feature.getGeometry() &&\n            (opt_hitExtent === undefined || intersects(\n              /** @type {Array<number>} */ (opt_hitExtent),\n              feature.getGeometry().getExtent()))) {\n          gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);\n          this.drawElements(gl, context, start, end);\n\n          var result = featureCallback(feature);\n\n          if (result) {\n            return result;\n          }\n\n        }\n        featureIndex--;\n        end = start;\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * @private\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {Object} skippedFeaturesHash Ids of features to skip.\n   */\n  WebGLCircleReplay.prototype.drawReplaySkipping_ = function drawReplaySkipping_ (gl, context, skippedFeaturesHash) {\n    var i, start, end, nextStyle, groupStart, feature, featureIndex, featureStart;\n    featureIndex = this.startIndices.length - 2;\n    end = start = this.startIndices[featureIndex + 1];\n    for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n      nextStyle = this.styles_[i];\n      this.setFillStyle_(gl, /** @type {Array<number>} */ (nextStyle[0]));\n      this.setStrokeStyle_(gl, /** @type {Array<number>} */ (nextStyle[1]),\n        /** @type {number} */ (nextStyle[2]));\n      groupStart = this.styleIndices_[i];\n\n      while (featureIndex >= 0 &&\n          this.startIndices[featureIndex] >= groupStart) {\n        featureStart = this.startIndices[featureIndex];\n        feature = this.startIndicesFeature[featureIndex];\n\n        if (skippedFeaturesHash[getUid(feature)]) {\n          if (start !== end) {\n            this.drawElements(gl, context, start, end);\n          }\n          end = featureStart;\n        }\n        featureIndex--;\n        start = featureStart;\n      }\n      if (start !== end) {\n        this.drawElements(gl, context, start, end);\n      }\n      start = end = groupStart;\n    }\n  };\n\n  /**\n   * @private\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {Array<number>} color Color.\n   */\n  WebGLCircleReplay.prototype.setFillStyle_ = function setFillStyle_ (gl, color) {\n    gl.uniform4fv(this.defaultLocations_.u_fillColor, color);\n  };\n\n  /**\n   * @private\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {Array<number>} color Color.\n   * @param {number} lineWidth Line width.\n   */\n  WebGLCircleReplay.prototype.setStrokeStyle_ = function setStrokeStyle_ (gl, color, lineWidth) {\n    gl.uniform4fv(this.defaultLocations_.u_strokeColor, color);\n    gl.uniform1f(this.defaultLocations_.u_lineWidth, lineWidth);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLCircleReplay.prototype.setFillStrokeStyle = function setFillStrokeStyle (fillStyle, strokeStyle) {\n    var strokeStyleColor, strokeStyleWidth;\n    if (strokeStyle) {\n      var strokeStyleLineDash = strokeStyle.getLineDash();\n      this.state_.lineDash = strokeStyleLineDash ?\n        strokeStyleLineDash : DEFAULT_LINEDASH;\n      var strokeStyleLineDashOffset = strokeStyle.getLineDashOffset();\n      this.state_.lineDashOffset = strokeStyleLineDashOffset ?\n        strokeStyleLineDashOffset : DEFAULT_LINEDASHOFFSET;\n      strokeStyleColor = strokeStyle.getColor();\n      if (!(strokeStyleColor instanceof CanvasGradient) &&\n          !(strokeStyleColor instanceof CanvasPattern)) {\n        strokeStyleColor = asArray(strokeStyleColor).map(function(c, i) {\n          return i != 3 ? c / 255 : c;\n        }) || DEFAULT_STROKESTYLE;\n      } else {\n        strokeStyleColor = DEFAULT_STROKESTYLE;\n      }\n      strokeStyleWidth = strokeStyle.getWidth();\n      strokeStyleWidth = strokeStyleWidth !== undefined ?\n        strokeStyleWidth : DEFAULT_LINEWIDTH;\n    } else {\n      strokeStyleColor = [0, 0, 0, 0];\n      strokeStyleWidth = 0;\n    }\n    var fillStyleColor = fillStyle ? fillStyle.getColor() : [0, 0, 0, 0];\n    if (!(fillStyleColor instanceof CanvasGradient) &&\n        !(fillStyleColor instanceof CanvasPattern)) {\n      fillStyleColor = asArray(fillStyleColor).map(function(c, i) {\n        return i != 3 ? c / 255 : c;\n      }) || DEFAULT_FILLSTYLE;\n    } else {\n      fillStyleColor = DEFAULT_FILLSTYLE;\n    }\n    if (!this.state_.strokeColor || !equals(this.state_.strokeColor, strokeStyleColor) ||\n        !this.state_.fillColor || !equals(this.state_.fillColor, fillStyleColor) ||\n        this.state_.lineWidth !== strokeStyleWidth) {\n      this.state_.changed = true;\n      this.state_.fillColor = fillStyleColor;\n      this.state_.strokeColor = strokeStyleColor;\n      this.state_.lineWidth = strokeStyleWidth;\n      this.styles_.push([fillStyleColor, strokeStyleColor, strokeStyleWidth]);\n    }\n  };\n\n  return WebGLCircleReplay;\n}(WebGLReplay));\n\n\nexport default WebGLCircleReplay;\n\n//# sourceMappingURL=CircleReplay.js.map","/**\n * @module ol/render/webgl/texturereplay/defaultshader\n */\n// This file is automatically generated, do not edit.\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../webgl.js';\nimport WebGLFragment from '../../../webgl/Fragment.js';\nimport WebGLVertex from '../../../webgl/Vertex.js';\n\nexport var fragment = new WebGLFragment(DEBUG_WEBGL ?\n  'precision mediump float;\\nvarying vec2 v_texCoord;\\nvarying float v_opacity;\\n\\nuniform float u_opacity;\\nuniform sampler2D u_image;\\n\\nvoid main(void) {\\n  vec4 texColor = texture2D(u_image, v_texCoord);\\n  gl_FragColor.rgb = texColor.rgb;\\n  float alpha = texColor.a * v_opacity * u_opacity;\\n  if (alpha == 0.0) {\\n    discard;\\n  }\\n  gl_FragColor.a = alpha;\\n}\\n' :\n  'precision mediump float;varying vec2 a;varying float b;uniform float k;uniform sampler2D l;void main(void){vec4 texColor=texture2D(l,a);gl_FragColor.rgb=texColor.rgb;float alpha=texColor.a*b*k;if(alpha==0.0){discard;}gl_FragColor.a=alpha;}');\n\nexport var vertex = new WebGLVertex(DEBUG_WEBGL ?\n  'varying vec2 v_texCoord;\\nvarying float v_opacity;\\n\\nattribute vec2 a_position;\\nattribute vec2 a_texCoord;\\nattribute vec2 a_offsets;\\nattribute float a_opacity;\\nattribute float a_rotateWithView;\\n\\nuniform mat4 u_projectionMatrix;\\nuniform mat4 u_offsetScaleMatrix;\\nuniform mat4 u_offsetRotateMatrix;\\n\\nvoid main(void) {\\n  mat4 offsetMatrix = u_offsetScaleMatrix;\\n  if (a_rotateWithView == 1.0) {\\n    offsetMatrix = u_offsetScaleMatrix * u_offsetRotateMatrix;\\n  }\\n  vec4 offsets = offsetMatrix * vec4(a_offsets, 0.0, 0.0);\\n  gl_Position = u_projectionMatrix * vec4(a_position, 0.0, 1.0) + offsets;\\n  v_texCoord = a_texCoord;\\n  v_opacity = a_opacity;\\n}\\n\\n\\n' :\n  'varying vec2 a;varying float b;attribute vec2 c;attribute vec2 d;attribute vec2 e;attribute float f;attribute float g;uniform mat4 h;uniform mat4 i;uniform mat4 j;void main(void){mat4 offsetMatrix=i;if(g==1.0){offsetMatrix=i*j;}vec4 offsets=offsetMatrix*vec4(e,0.0,0.0);gl_Position=h*vec4(c,0.0,1.0)+offsets;a=d;b=f;}');\n\n//# sourceMappingURL=defaultshader.js.map","/**\n * @module ol/render/webgl/texturereplay/defaultshader/Locations\n */\n// This file is automatically generated, do not edit\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../../webgl.js';\n\nvar Locations = function Locations(gl, program) {\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_projectionMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_projectionMatrix' : 'h');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_offsetScaleMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_offsetScaleMatrix' : 'i');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_offsetRotateMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_offsetRotateMatrix' : 'j');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_opacity = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_opacity' : 'k');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_image = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_image' : 'l');\n\n  /**\n   * @type {number}\n   */\n  this.a_position = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_position' : 'c');\n\n  /**\n   * @type {number}\n   */\n  this.a_texCoord = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_texCoord' : 'd');\n\n  /**\n   * @type {number}\n   */\n  this.a_offsets = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_offsets' : 'e');\n\n  /**\n   * @type {number}\n   */\n  this.a_opacity = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_opacity' : 'f');\n\n  /**\n   * @type {number}\n   */\n  this.a_rotateWithView = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_rotateWithView' : 'g');\n\n};\n\nexport default Locations;\n\n//# sourceMappingURL=Locations.js.map","/**\n * @module ol/webgl/ContextEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  LOST: 'webglcontextlost',\n  RESTORED: 'webglcontextrestored'\n};\n\n//# sourceMappingURL=ContextEventType.js.map","/**\n * @module ol/webgl/Context\n */\nimport {getUid} from '../util.js';\nimport {EXTENSIONS as WEBGL_EXTENSIONS} from '../webgl.js';\nimport Disposable from '../Disposable.js';\nimport {includes} from '../array.js';\nimport {listen, unlistenAll} from '../events.js';\nimport {clear} from '../obj.js';\nimport {ARRAY_BUFFER, ELEMENT_ARRAY_BUFFER, TEXTURE_2D, TEXTURE_WRAP_S, TEXTURE_WRAP_T} from '../webgl.js';\nimport ContextEventType from '../webgl/ContextEventType.js';\n\n\n/**\n * @typedef {Object} BufferCacheEntry\n * @property {import(\"./Buffer.js\").default} buf\n * @property {WebGLBuffer} buffer\n */\n\n\n/**\n * @classdesc\n * A WebGL context for accessing low-level WebGL capabilities.\n */\nvar WebGLContext = /*@__PURE__*/(function (Disposable) {\n  function WebGLContext(canvas, gl) {\n    Disposable.call(this);\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.canvas_ = canvas;\n\n    /**\n     * @private\n     * @type {WebGLRenderingContext}\n     */\n    this.gl_ = gl;\n\n    /**\n     * @private\n     * @type {!Object<string, BufferCacheEntry>}\n     */\n    this.bufferCache_ = {};\n\n    /**\n     * @private\n     * @type {!Object<string, WebGLShader>}\n     */\n    this.shaderCache_ = {};\n\n    /**\n     * @private\n     * @type {!Object<string, WebGLProgram>}\n     */\n    this.programCache_ = {};\n\n    /**\n     * @private\n     * @type {WebGLProgram}\n     */\n    this.currentProgram_ = null;\n\n    /**\n     * @private\n     * @type {WebGLFramebuffer}\n     */\n    this.hitDetectionFramebuffer_ = null;\n\n    /**\n     * @private\n     * @type {WebGLTexture}\n     */\n    this.hitDetectionTexture_ = null;\n\n    /**\n     * @private\n     * @type {WebGLRenderbuffer}\n     */\n    this.hitDetectionRenderbuffer_ = null;\n\n    /**\n     * @type {boolean}\n     */\n    this.hasOESElementIndexUint = includes(WEBGL_EXTENSIONS, 'OES_element_index_uint');\n\n    // use the OES_element_index_uint extension if available\n    if (this.hasOESElementIndexUint) {\n      gl.getExtension('OES_element_index_uint');\n    }\n\n    listen(this.canvas_, ContextEventType.LOST,\n      this.handleWebGLContextLost, this);\n    listen(this.canvas_, ContextEventType.RESTORED,\n      this.handleWebGLContextRestored, this);\n\n  }\n\n  if ( Disposable ) WebGLContext.__proto__ = Disposable;\n  WebGLContext.prototype = Object.create( Disposable && Disposable.prototype );\n  WebGLContext.prototype.constructor = WebGLContext;\n\n  /**\n   * Just bind the buffer if it's in the cache. Otherwise create\n   * the WebGL buffer, bind it, populate it, and add an entry to\n   * the cache.\n   * @param {number} target Target.\n   * @param {import(\"./Buffer.js\").default} buf Buffer.\n   */\n  WebGLContext.prototype.bindBuffer = function bindBuffer (target, buf) {\n    var gl = this.getGL();\n    var arr = buf.getArray();\n    var bufferKey = getUid(buf);\n    if (bufferKey in this.bufferCache_) {\n      var bufferCacheEntry = this.bufferCache_[bufferKey];\n      gl.bindBuffer(target, bufferCacheEntry.buffer);\n    } else {\n      var buffer = gl.createBuffer();\n      gl.bindBuffer(target, buffer);\n      var /** @type {ArrayBufferView} */ arrayBuffer;\n      if (target == ARRAY_BUFFER) {\n        arrayBuffer = new Float32Array(arr);\n      } else if (target == ELEMENT_ARRAY_BUFFER) {\n        arrayBuffer = this.hasOESElementIndexUint ?\n          new Uint32Array(arr) : new Uint16Array(arr);\n      }\n      gl.bufferData(target, arrayBuffer, buf.getUsage());\n      this.bufferCache_[bufferKey] = {\n        buf: buf,\n        buffer: buffer\n      };\n    }\n  };\n\n  /**\n   * @param {import(\"./Buffer.js\").default} buf Buffer.\n   */\n  WebGLContext.prototype.deleteBuffer = function deleteBuffer (buf) {\n    var gl = this.getGL();\n    var bufferKey = getUid(buf);\n    var bufferCacheEntry = this.bufferCache_[bufferKey];\n    if (!gl.isContextLost()) {\n      gl.deleteBuffer(bufferCacheEntry.buffer);\n    }\n    delete this.bufferCache_[bufferKey];\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLContext.prototype.disposeInternal = function disposeInternal () {\n    unlistenAll(this.canvas_);\n    var gl = this.getGL();\n    if (!gl.isContextLost()) {\n      for (var key in this.bufferCache_) {\n        gl.deleteBuffer(this.bufferCache_[key].buffer);\n      }\n      for (var key$1 in this.programCache_) {\n        gl.deleteProgram(this.programCache_[key$1]);\n      }\n      for (var key$2 in this.shaderCache_) {\n        gl.deleteShader(this.shaderCache_[key$2]);\n      }\n      // delete objects for hit-detection\n      gl.deleteFramebuffer(this.hitDetectionFramebuffer_);\n      gl.deleteRenderbuffer(this.hitDetectionRenderbuffer_);\n      gl.deleteTexture(this.hitDetectionTexture_);\n    }\n  };\n\n  /**\n   * @return {HTMLCanvasElement} Canvas.\n   */\n  WebGLContext.prototype.getCanvas = function getCanvas () {\n    return this.canvas_;\n  };\n\n  /**\n   * Get the WebGL rendering context\n   * @return {WebGLRenderingContext} The rendering context.\n   * @api\n   */\n  WebGLContext.prototype.getGL = function getGL () {\n    return this.gl_;\n  };\n\n  /**\n   * Get the frame buffer for hit detection.\n   * @return {WebGLFramebuffer} The hit detection frame buffer.\n   */\n  WebGLContext.prototype.getHitDetectionFramebuffer = function getHitDetectionFramebuffer () {\n    if (!this.hitDetectionFramebuffer_) {\n      this.initHitDetectionFramebuffer_();\n    }\n    return this.hitDetectionFramebuffer_;\n  };\n\n  /**\n   * Get shader from the cache if it's in the cache. Otherwise, create\n   * the WebGL shader, compile it, and add entry to cache.\n   * @param {import(\"./Shader.js\").default} shaderObject Shader object.\n   * @return {WebGLShader} Shader.\n   */\n  WebGLContext.prototype.getShader = function getShader (shaderObject) {\n    var shaderKey = getUid(shaderObject);\n    if (shaderKey in this.shaderCache_) {\n      return this.shaderCache_[shaderKey];\n    } else {\n      var gl = this.getGL();\n      var shader = gl.createShader(shaderObject.getType());\n      gl.shaderSource(shader, shaderObject.getSource());\n      gl.compileShader(shader);\n      this.shaderCache_[shaderKey] = shader;\n      return shader;\n    }\n  };\n\n  /**\n   * Get the program from the cache if it's in the cache. Otherwise create\n   * the WebGL program, attach the shaders to it, and add an entry to the\n   * cache.\n   * @param {import(\"./Fragment.js\").default} fragmentShaderObject Fragment shader.\n   * @param {import(\"./Vertex.js\").default} vertexShaderObject Vertex shader.\n   * @return {WebGLProgram} Program.\n   */\n  WebGLContext.prototype.getProgram = function getProgram (fragmentShaderObject, vertexShaderObject) {\n    var programKey = getUid(fragmentShaderObject) + '/' + getUid(vertexShaderObject);\n    if (programKey in this.programCache_) {\n      return this.programCache_[programKey];\n    } else {\n      var gl = this.getGL();\n      var program = gl.createProgram();\n      gl.attachShader(program, this.getShader(fragmentShaderObject));\n      gl.attachShader(program, this.getShader(vertexShaderObject));\n      gl.linkProgram(program);\n      this.programCache_[programKey] = program;\n      return program;\n    }\n  };\n\n  /**\n   * FIXME empty description for jsdoc\n   */\n  WebGLContext.prototype.handleWebGLContextLost = function handleWebGLContextLost () {\n    clear(this.bufferCache_);\n    clear(this.shaderCache_);\n    clear(this.programCache_);\n    this.currentProgram_ = null;\n    this.hitDetectionFramebuffer_ = null;\n    this.hitDetectionTexture_ = null;\n    this.hitDetectionRenderbuffer_ = null;\n  };\n\n  /**\n   * FIXME empty description for jsdoc\n   */\n  WebGLContext.prototype.handleWebGLContextRestored = function handleWebGLContextRestored () {\n  };\n\n  /**\n   * Creates a 1x1 pixel framebuffer for the hit-detection.\n   * @private\n   */\n  WebGLContext.prototype.initHitDetectionFramebuffer_ = function initHitDetectionFramebuffer_ () {\n    var gl = this.gl_;\n    var framebuffer = gl.createFramebuffer();\n    gl.bindFramebuffer(gl.FRAMEBUFFER, framebuffer);\n\n    var texture = createEmptyTexture(gl, 1, 1);\n    var renderbuffer = gl.createRenderbuffer();\n    gl.bindRenderbuffer(gl.RENDERBUFFER, renderbuffer);\n    gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_COMPONENT16, 1, 1);\n    gl.framebufferTexture2D(\n      gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture, 0);\n    gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT,\n      gl.RENDERBUFFER, renderbuffer);\n\n    gl.bindTexture(gl.TEXTURE_2D, null);\n    gl.bindRenderbuffer(gl.RENDERBUFFER, null);\n    gl.bindFramebuffer(gl.FRAMEBUFFER, null);\n\n    this.hitDetectionFramebuffer_ = framebuffer;\n    this.hitDetectionTexture_ = texture;\n    this.hitDetectionRenderbuffer_ = renderbuffer;\n  };\n\n  /**\n   * Use a program.  If the program is already in use, this will return `false`.\n   * @param {WebGLProgram} program Program.\n   * @return {boolean} Changed.\n   * @api\n   */\n  WebGLContext.prototype.useProgram = function useProgram (program) {\n    if (program == this.currentProgram_) {\n      return false;\n    } else {\n      var gl = this.getGL();\n      gl.useProgram(program);\n      this.currentProgram_ = program;\n      return true;\n    }\n  };\n\n  return WebGLContext;\n}(Disposable));\n\n\n/**\n * @param {WebGLRenderingContext} gl WebGL rendering context.\n * @param {number=} opt_wrapS wrapS.\n * @param {number=} opt_wrapT wrapT.\n * @return {WebGLTexture} The texture.\n */\nfunction createTextureInternal(gl, opt_wrapS, opt_wrapT) {\n  var texture = gl.createTexture();\n  gl.bindTexture(gl.TEXTURE_2D, texture);\n  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);\n  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);\n\n  if (opt_wrapS !== undefined) {\n    gl.texParameteri(\n      TEXTURE_2D, TEXTURE_WRAP_S, opt_wrapS);\n  }\n  if (opt_wrapT !== undefined) {\n    gl.texParameteri(\n      TEXTURE_2D, TEXTURE_WRAP_T, opt_wrapT);\n  }\n\n  return texture;\n}\n\n\n/**\n * @param {WebGLRenderingContext} gl WebGL rendering context.\n * @param {number} width Width.\n * @param {number} height Height.\n * @param {number=} opt_wrapS wrapS.\n * @param {number=} opt_wrapT wrapT.\n * @return {WebGLTexture} The texture.\n */\nexport function createEmptyTexture(gl, width, height, opt_wrapS, opt_wrapT) {\n  var texture = createTextureInternal(gl, opt_wrapS, opt_wrapT);\n  gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);\n  return texture;\n}\n\n\n/**\n * @param {WebGLRenderingContext} gl WebGL rendering context.\n * @param {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} image Image.\n * @param {number=} opt_wrapS wrapS.\n * @param {number=} opt_wrapT wrapT.\n * @return {WebGLTexture} The texture.\n */\nexport function createTexture(gl, image, opt_wrapS, opt_wrapT) {\n  var texture = createTextureInternal(gl, opt_wrapS, opt_wrapT);\n  gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image);\n  return texture;\n}\n\nexport default WebGLContext;\n\n//# sourceMappingURL=Context.js.map","/**\n * @module ol/render/webgl/TextureReplay\n */\nimport {abstract, getUid} from '../../util.js';\nimport {intersects} from '../../extent.js';\nimport {isEmpty} from '../../obj.js';\nimport {fragment, vertex} from './texturereplay/defaultshader.js';\nimport Locations from './texturereplay/defaultshader/Locations.js';\nimport WebGLReplay from './Replay.js';\nimport {CLAMP_TO_EDGE, FLOAT, TEXTURE_2D} from '../../webgl.js';\nimport {createTexture} from '../../webgl/Context.js';\n\nvar WebGLTextureReplay = /*@__PURE__*/(function (WebGLReplay) {\n  function WebGLTextureReplay(tolerance, maxExtent) {\n    WebGLReplay.call(this, tolerance, maxExtent);\n\n    /**\n     * @type {number|undefined}\n     * @protected\n     */\n    this.anchorX = undefined;\n\n    /**\n     * @type {number|undefined}\n     * @protected\n     */\n    this.anchorY = undefined;\n\n    /**\n     * @type {Array<number>}\n     * @protected\n     */\n    this.groupIndices = [];\n\n    /**\n     * @type {Array<number>}\n     * @protected\n     */\n    this.hitDetectionGroupIndices = [];\n\n    /**\n     * @type {number|undefined}\n     * @protected\n     */\n    this.height = undefined;\n\n    /**\n     * @type {number|undefined}\n     * @protected\n     */\n    this.imageHeight = undefined;\n\n    /**\n     * @type {number|undefined}\n     * @protected\n     */\n    this.imageWidth = undefined;\n\n    /**\n     * @protected\n     * @type {import(\"./texturereplay/defaultshader/Locations.js\").default}\n     */\n    this.defaultLocations = null;\n\n    /**\n     * @protected\n     * @type {number|undefined}\n     */\n    this.opacity = undefined;\n\n    /**\n     * @type {number|undefined}\n     * @protected\n     */\n    this.originX = undefined;\n\n    /**\n     * @type {number|undefined}\n     * @protected\n     */\n    this.originY = undefined;\n\n    /**\n     * @protected\n     * @type {boolean|undefined}\n     */\n    this.rotateWithView = undefined;\n\n    /**\n     * @protected\n     * @type {number|undefined}\n     */\n    this.rotation = undefined;\n\n    /**\n     * @protected\n     * @type {number|undefined}\n     */\n    this.scale = undefined;\n\n    /**\n     * @type {number|undefined}\n     * @protected\n     */\n    this.width = undefined;\n  }\n\n  if ( WebGLReplay ) WebGLTextureReplay.__proto__ = WebGLReplay;\n  WebGLTextureReplay.prototype = Object.create( WebGLReplay && WebGLReplay.prototype );\n  WebGLTextureReplay.prototype.constructor = WebGLTextureReplay;\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextureReplay.prototype.getDeleteResourcesFunction = function getDeleteResourcesFunction (context) {\n    var verticesBuffer = this.verticesBuffer;\n    var indicesBuffer = this.indicesBuffer;\n    var textures = this.getTextures(true);\n    var gl = context.getGL();\n    return function() {\n      if (!gl.isContextLost()) {\n        var i, ii;\n        for (i = 0, ii = textures.length; i < ii; ++i) {\n          gl.deleteTexture(textures[i]);\n        }\n      }\n      context.deleteBuffer(verticesBuffer);\n      context.deleteBuffer(indicesBuffer);\n    };\n  };\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @return {number} My end.\n   * @protected\n   */\n  WebGLTextureReplay.prototype.drawCoordinates = function drawCoordinates (flatCoordinates, offset, end, stride) {\n    var anchorX = /** @type {number} */ (this.anchorX);\n    var anchorY = /** @type {number} */ (this.anchorY);\n    var height = /** @type {number} */ (this.height);\n    var imageHeight = /** @type {number} */ (this.imageHeight);\n    var imageWidth = /** @type {number} */ (this.imageWidth);\n    var opacity = /** @type {number} */ (this.opacity);\n    var originX = /** @type {number} */ (this.originX);\n    var originY = /** @type {number} */ (this.originY);\n    var rotateWithView = this.rotateWithView ? 1.0 : 0.0;\n    // this.rotation_ is anti-clockwise, but rotation is clockwise\n    var rotation = /** @type {number} */ (-this.rotation);\n    var scale = /** @type {number} */ (this.scale);\n    var width = /** @type {number} */ (this.width);\n    var cos = Math.cos(rotation);\n    var sin = Math.sin(rotation);\n    var numIndices = this.indices.length;\n    var numVertices = this.vertices.length;\n    var i, n, offsetX, offsetY, x, y;\n    for (i = offset; i < end; i += stride) {\n      x = flatCoordinates[i] - this.origin[0];\n      y = flatCoordinates[i + 1] - this.origin[1];\n\n      // There are 4 vertices per [x, y] point, one for each corner of the\n      // rectangle we're going to draw. We'd use 1 vertex per [x, y] point if\n      // WebGL supported Geometry Shaders (which can emit new vertices), but that\n      // is not currently the case.\n      //\n      // And each vertex includes 8 values: the x and y coordinates, the x and\n      // y offsets used to calculate the position of the corner, the u and\n      // v texture coordinates for the corner, the opacity, and whether the\n      // the image should be rotated with the view (rotateWithView).\n\n      n = numVertices / 8;\n\n      // bottom-left corner\n      offsetX = -scale * anchorX;\n      offsetY = -scale * (height - anchorY);\n      this.vertices[numVertices++] = x;\n      this.vertices[numVertices++] = y;\n      this.vertices[numVertices++] = offsetX * cos - offsetY * sin;\n      this.vertices[numVertices++] = offsetX * sin + offsetY * cos;\n      this.vertices[numVertices++] = originX / imageWidth;\n      this.vertices[numVertices++] = (originY + height) / imageHeight;\n      this.vertices[numVertices++] = opacity;\n      this.vertices[numVertices++] = rotateWithView;\n\n      // bottom-right corner\n      offsetX = scale * (width - anchorX);\n      offsetY = -scale * (height - anchorY);\n      this.vertices[numVertices++] = x;\n      this.vertices[numVertices++] = y;\n      this.vertices[numVertices++] = offsetX * cos - offsetY * sin;\n      this.vertices[numVertices++] = offsetX * sin + offsetY * cos;\n      this.vertices[numVertices++] = (originX + width) / imageWidth;\n      this.vertices[numVertices++] = (originY + height) / imageHeight;\n      this.vertices[numVertices++] = opacity;\n      this.vertices[numVertices++] = rotateWithView;\n\n      // top-right corner\n      offsetX = scale * (width - anchorX);\n      offsetY = scale * anchorY;\n      this.vertices[numVertices++] = x;\n      this.vertices[numVertices++] = y;\n      this.vertices[numVertices++] = offsetX * cos - offsetY * sin;\n      this.vertices[numVertices++] = offsetX * sin + offsetY * cos;\n      this.vertices[numVertices++] = (originX + width) / imageWidth;\n      this.vertices[numVertices++] = originY / imageHeight;\n      this.vertices[numVertices++] = opacity;\n      this.vertices[numVertices++] = rotateWithView;\n\n      // top-left corner\n      offsetX = -scale * anchorX;\n      offsetY = scale * anchorY;\n      this.vertices[numVertices++] = x;\n      this.vertices[numVertices++] = y;\n      this.vertices[numVertices++] = offsetX * cos - offsetY * sin;\n      this.vertices[numVertices++] = offsetX * sin + offsetY * cos;\n      this.vertices[numVertices++] = originX / imageWidth;\n      this.vertices[numVertices++] = originY / imageHeight;\n      this.vertices[numVertices++] = opacity;\n      this.vertices[numVertices++] = rotateWithView;\n\n      this.indices[numIndices++] = n;\n      this.indices[numIndices++] = n + 1;\n      this.indices[numIndices++] = n + 2;\n      this.indices[numIndices++] = n;\n      this.indices[numIndices++] = n + 2;\n      this.indices[numIndices++] = n + 3;\n    }\n\n    return numVertices;\n  };\n\n  /**\n   * @protected\n   * @param {Array<WebGLTexture>} textures Textures.\n   * @param {Array<HTMLCanvasElement|HTMLImageElement|HTMLVideoElement>} images Images.\n   * @param {!Object<string, WebGLTexture>} texturePerImage Texture cache.\n   * @param {WebGLRenderingContext} gl Gl.\n   */\n  WebGLTextureReplay.prototype.createTextures = function createTextures (textures, images, texturePerImage, gl) {\n    var texture, image, uid, i;\n    var ii = images.length;\n    for (i = 0; i < ii; ++i) {\n      image = images[i];\n\n      uid = getUid(image);\n      if (uid in texturePerImage) {\n        texture = texturePerImage[uid];\n      } else {\n        texture = createTexture(\n          gl, image, CLAMP_TO_EDGE, CLAMP_TO_EDGE);\n        texturePerImage[uid] = texture;\n      }\n      textures[i] = texture;\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextureReplay.prototype.setUpProgram = function setUpProgram (gl, context, size, pixelRatio) {\n    // get the program\n    var program = context.getProgram(fragment, vertex);\n\n    // get the locations\n    var locations;\n    if (!this.defaultLocations) {\n      locations = new Locations(gl, program);\n      this.defaultLocations = locations;\n    } else {\n      locations = this.defaultLocations;\n    }\n\n    // use the program (FIXME: use the return value)\n    context.useProgram(program);\n\n    // enable the vertex attrib arrays\n    gl.enableVertexAttribArray(locations.a_position);\n    gl.vertexAttribPointer(locations.a_position, 2, FLOAT,\n      false, 32, 0);\n\n    gl.enableVertexAttribArray(locations.a_offsets);\n    gl.vertexAttribPointer(locations.a_offsets, 2, FLOAT,\n      false, 32, 8);\n\n    gl.enableVertexAttribArray(locations.a_texCoord);\n    gl.vertexAttribPointer(locations.a_texCoord, 2, FLOAT,\n      false, 32, 16);\n\n    gl.enableVertexAttribArray(locations.a_opacity);\n    gl.vertexAttribPointer(locations.a_opacity, 1, FLOAT,\n      false, 32, 24);\n\n    gl.enableVertexAttribArray(locations.a_rotateWithView);\n    gl.vertexAttribPointer(locations.a_rotateWithView, 1, FLOAT,\n      false, 32, 28);\n\n    return locations;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextureReplay.prototype.shutDownProgram = function shutDownProgram (gl, locations) {\n    gl.disableVertexAttribArray(locations.a_position);\n    gl.disableVertexAttribArray(locations.a_offsets);\n    gl.disableVertexAttribArray(locations.a_texCoord);\n    gl.disableVertexAttribArray(locations.a_opacity);\n    gl.disableVertexAttribArray(locations.a_rotateWithView);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextureReplay.prototype.drawReplay = function drawReplay (gl, context, skippedFeaturesHash, hitDetection) {\n    var textures = hitDetection ? this.getHitDetectionTextures() : this.getTextures();\n    var groupIndices = hitDetection ? this.hitDetectionGroupIndices : this.groupIndices;\n\n    if (!isEmpty(skippedFeaturesHash)) {\n      this.drawReplaySkipping(gl, context, skippedFeaturesHash, textures, groupIndices);\n    } else {\n      var i, ii, start;\n      for (i = 0, ii = textures.length, start = 0; i < ii; ++i) {\n        gl.bindTexture(TEXTURE_2D, textures[i]);\n        var end = groupIndices[i];\n        this.drawElements(gl, context, start, end);\n        start = end;\n      }\n    }\n  };\n\n  /**\n   * Draw the replay while paying attention to skipped features.\n   *\n   * This functions creates groups of features that can be drawn to together,\n   * so that the number of `drawElements` calls is minimized.\n   *\n   * For example given the following texture groups:\n   *\n   *    Group 1: A B C\n   *    Group 2: D [E] F G\n   *\n   * If feature E should be skipped, the following `drawElements` calls will be\n   * made:\n   *\n   *    drawElements with feature A, B and C\n   *    drawElements with feature D\n   *    drawElements with feature F and G\n   *\n   * @protected\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features\n   *  to skip.\n   * @param {Array<WebGLTexture>} textures Textures.\n   * @param {Array<number>} groupIndices Texture group indices.\n   */\n  WebGLTextureReplay.prototype.drawReplaySkipping = function drawReplaySkipping (gl, context, skippedFeaturesHash, textures, groupIndices) {\n    var featureIndex = 0;\n\n    var i, ii;\n    for (i = 0, ii = textures.length; i < ii; ++i) {\n      gl.bindTexture(TEXTURE_2D, textures[i]);\n      var groupStart = (i > 0) ? groupIndices[i - 1] : 0;\n      var groupEnd = groupIndices[i];\n\n      var start = groupStart;\n      var end = groupStart;\n      while (featureIndex < this.startIndices.length &&\n          this.startIndices[featureIndex] <= groupEnd) {\n        var feature = this.startIndicesFeature[featureIndex];\n\n        if (skippedFeaturesHash[getUid(feature)] !== undefined) {\n          // feature should be skipped\n          if (start !== end) {\n            // draw the features so far\n            this.drawElements(gl, context, start, end);\n          }\n          // continue with the next feature\n          start = (featureIndex === this.startIndices.length - 1) ?\n            groupEnd : this.startIndices[featureIndex + 1];\n          end = start;\n        } else {\n          // the feature is not skipped, augment the end index\n          end = (featureIndex === this.startIndices.length - 1) ?\n            groupEnd : this.startIndices[featureIndex + 1];\n        }\n        featureIndex++;\n      }\n\n      if (start !== end) {\n        // draw the remaining features (in case there was no skipped feature\n        // in this texture group, all features of a group are drawn together)\n        this.drawElements(gl, context, start, end);\n      }\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextureReplay.prototype.drawHitDetectionReplayOneByOne = function drawHitDetectionReplayOneByOne (gl, context, skippedFeaturesHash, featureCallback, opt_hitExtent) {\n    var i, groupStart, start, end, feature;\n    var featureIndex = this.startIndices.length - 1;\n    var hitDetectionTextures = this.getHitDetectionTextures();\n    for (i = hitDetectionTextures.length - 1; i >= 0; --i) {\n      gl.bindTexture(TEXTURE_2D, hitDetectionTextures[i]);\n      groupStart = (i > 0) ? this.hitDetectionGroupIndices[i - 1] : 0;\n      end = this.hitDetectionGroupIndices[i];\n\n      // draw all features for this texture group\n      while (featureIndex >= 0 &&\n          this.startIndices[featureIndex] >= groupStart) {\n        start = this.startIndices[featureIndex];\n        feature = this.startIndicesFeature[featureIndex];\n\n        if (skippedFeaturesHash[getUid(feature)] === undefined &&\n            feature.getGeometry() &&\n            (opt_hitExtent === undefined || intersects(\n              /** @type {Array<number>} */ (opt_hitExtent),\n              feature.getGeometry().getExtent()))) {\n          gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);\n          this.drawElements(gl, context, start, end);\n\n          var result = featureCallback(feature);\n          if (result) {\n            return result;\n          }\n        }\n\n        end = start;\n        featureIndex--;\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextureReplay.prototype.finish = function finish (context) {\n    this.anchorX = undefined;\n    this.anchorY = undefined;\n    this.height = undefined;\n    this.imageHeight = undefined;\n    this.imageWidth = undefined;\n    this.indices = null;\n    this.opacity = undefined;\n    this.originX = undefined;\n    this.originY = undefined;\n    this.rotateWithView = undefined;\n    this.rotation = undefined;\n    this.scale = undefined;\n    this.vertices = null;\n    this.width = undefined;\n  };\n\n  /**\n   * @abstract\n   * @protected\n   * @param {boolean=} opt_all Return hit detection textures with regular ones.\n   * @return {Array<WebGLTexture>} Textures.\n   */\n  WebGLTextureReplay.prototype.getTextures = function getTextures (opt_all) {\n    return abstract();\n  };\n\n  /**\n   * @abstract\n   * @protected\n   * @return {Array<WebGLTexture>} Textures.\n   */\n  WebGLTextureReplay.prototype.getHitDetectionTextures = function getHitDetectionTextures () {\n    return abstract();\n  };\n\n  return WebGLTextureReplay;\n}(WebGLReplay));\n\n\nexport default WebGLTextureReplay;\n\n//# sourceMappingURL=TextureReplay.js.map","/**\n * @module ol/render/webgl/ImageReplay\n */\nimport {getUid} from '../../util.js';\nimport WebGLTextureReplay from './TextureReplay.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\n\nvar WebGLImageReplay = /*@__PURE__*/(function (WebGLTextureReplay) {\n  function WebGLImageReplay(tolerance, maxExtent) {\n    WebGLTextureReplay.call(this, tolerance, maxExtent);\n\n    /**\n     * @type {Array<HTMLCanvasElement|HTMLImageElement|HTMLVideoElement>}\n     * @protected\n     */\n    this.images_ = [];\n\n    /**\n     * @type {Array<HTMLCanvasElement|HTMLImageElement|HTMLVideoElement>}\n     * @protected\n     */\n    this.hitDetectionImages_ = [];\n\n    /**\n     * @type {Array<WebGLTexture>}\n     * @private\n     */\n    this.textures_ = [];\n\n    /**\n     * @type {Array<WebGLTexture>}\n     * @private\n     */\n    this.hitDetectionTextures_ = [];\n\n  }\n\n  if ( WebGLTextureReplay ) WebGLImageReplay.__proto__ = WebGLTextureReplay;\n  WebGLImageReplay.prototype = Object.create( WebGLTextureReplay && WebGLTextureReplay.prototype );\n  WebGLImageReplay.prototype.constructor = WebGLImageReplay;\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImageReplay.prototype.drawMultiPoint = function drawMultiPoint (multiPointGeometry, feature) {\n    this.startIndices.push(this.indices.length);\n    this.startIndicesFeature.push(feature);\n    var flatCoordinates = multiPointGeometry.getFlatCoordinates();\n    var stride = multiPointGeometry.getStride();\n    this.drawCoordinates(\n      flatCoordinates, 0, flatCoordinates.length, stride);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImageReplay.prototype.drawPoint = function drawPoint (pointGeometry, feature) {\n    this.startIndices.push(this.indices.length);\n    this.startIndicesFeature.push(feature);\n    var flatCoordinates = pointGeometry.getFlatCoordinates();\n    var stride = pointGeometry.getStride();\n    this.drawCoordinates(\n      flatCoordinates, 0, flatCoordinates.length, stride);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImageReplay.prototype.finish = function finish (context) {\n    var gl = context.getGL();\n\n    this.groupIndices.push(this.indices.length);\n    this.hitDetectionGroupIndices.push(this.indices.length);\n\n    // create, bind, and populate the vertices buffer\n    this.verticesBuffer = new WebGLBuffer(this.vertices);\n\n    var indices = this.indices;\n\n    // create, bind, and populate the indices buffer\n    this.indicesBuffer = new WebGLBuffer(indices);\n\n    // create textures\n    /** @type {Object<string, WebGLTexture>} */\n    var texturePerImage = {};\n\n    this.createTextures(this.textures_, this.images_, texturePerImage, gl);\n\n    this.createTextures(this.hitDetectionTextures_, this.hitDetectionImages_,\n      texturePerImage, gl);\n\n    this.images_ = null;\n    this.hitDetectionImages_ = null;\n    WebGLTextureReplay.prototype.finish.call(this, context);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImageReplay.prototype.setImageStyle = function setImageStyle (imageStyle) {\n    var anchor = imageStyle.getAnchor();\n    var image = imageStyle.getImage(1);\n    var imageSize = imageStyle.getImageSize();\n    var hitDetectionImage = imageStyle.getHitDetectionImage(1);\n    var opacity = imageStyle.getOpacity();\n    var origin = imageStyle.getOrigin();\n    var rotateWithView = imageStyle.getRotateWithView();\n    var rotation = imageStyle.getRotation();\n    var size = imageStyle.getSize();\n    var scale = imageStyle.getScale();\n\n    var currentImage;\n    if (this.images_.length === 0) {\n      this.images_.push(image);\n    } else {\n      currentImage = this.images_[this.images_.length - 1];\n      if (getUid(currentImage) != getUid(image)) {\n        this.groupIndices.push(this.indices.length);\n        this.images_.push(image);\n      }\n    }\n\n    if (this.hitDetectionImages_.length === 0) {\n      this.hitDetectionImages_.push(hitDetectionImage);\n    } else {\n      currentImage =\n          this.hitDetectionImages_[this.hitDetectionImages_.length - 1];\n      if (getUid(currentImage) != getUid(hitDetectionImage)) {\n        this.hitDetectionGroupIndices.push(this.indices.length);\n        this.hitDetectionImages_.push(hitDetectionImage);\n      }\n    }\n\n    this.anchorX = anchor[0];\n    this.anchorY = anchor[1];\n    this.height = size[1];\n    this.imageHeight = imageSize[1];\n    this.imageWidth = imageSize[0];\n    this.opacity = opacity;\n    this.originX = origin[0];\n    this.originY = origin[1];\n    this.rotation = rotation;\n    this.rotateWithView = rotateWithView;\n    this.scale = scale;\n    this.width = size[0];\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImageReplay.prototype.getTextures = function getTextures (opt_all) {\n    return opt_all ? this.textures_.concat(this.hitDetectionTextures_) : this.textures_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImageReplay.prototype.getHitDetectionTextures = function getHitDetectionTextures () {\n    return this.hitDetectionTextures_;\n  };\n\n  return WebGLImageReplay;\n}(WebGLTextureReplay));\n\n\nexport default WebGLImageReplay;\n\n//# sourceMappingURL=ImageReplay.js.map","/**\n * @module ol/geom/flat/topology\n */\nimport {linearRing as linearRingArea} from './area.js';\n\n/**\n * Check if the linestring is a boundary.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {boolean} The linestring is a boundary.\n */\nexport function lineStringIsClosed(flatCoordinates, offset, end, stride) {\n  var lastCoord = end - stride;\n  if (flatCoordinates[offset] === flatCoordinates[lastCoord] &&\n      flatCoordinates[offset + 1] === flatCoordinates[lastCoord + 1] && (end - offset) / stride > 3) {\n    return !!linearRingArea(flatCoordinates, offset, end, stride);\n  }\n  return false;\n}\n\n//# sourceMappingURL=topology.js.map","/**\n * @module ol/render/webgl/linestringreplay/defaultshader\n */\n// This file is automatically generated, do not edit.\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../webgl.js';\nimport WebGLFragment from '../../../webgl/Fragment.js';\nimport WebGLVertex from '../../../webgl/Vertex.js';\n\nexport var fragment = new WebGLFragment(DEBUG_WEBGL ?\n  'precision mediump float;\\nvarying float v_round;\\nvarying vec2 v_roundVertex;\\nvarying float v_halfWidth;\\n\\n\\n\\nuniform float u_opacity;\\nuniform vec4 u_color;\\nuniform vec2 u_size;\\nuniform float u_pixelRatio;\\n\\nvoid main(void) {\\n  if (v_round > 0.0) {\\n    vec2 windowCoords = vec2((v_roundVertex.x + 1.0) / 2.0 * u_size.x * u_pixelRatio,\\n        (v_roundVertex.y + 1.0) / 2.0 * u_size.y * u_pixelRatio);\\n    if (length(windowCoords - gl_FragCoord.xy) > v_halfWidth * u_pixelRatio) {\\n      discard;\\n    }\\n  }\\n  gl_FragColor = u_color;\\n  float alpha = u_color.a * u_opacity;\\n  if (alpha == 0.0) {\\n    discard;\\n  }\\n  gl_FragColor.a = alpha;\\n}\\n' :\n  'precision mediump float;varying float a;varying vec2 aVertex;varying float c;uniform float m;uniform vec4 n;uniform vec2 o;uniform float p;void main(void){if(a>0.0){vec2 windowCoords=vec2((aVertex.x+1.0)/2.0*o.x*p,(aVertex.y+1.0)/2.0*o.y*p);if(length(windowCoords-gl_FragCoord.xy)>c*p){discard;}} gl_FragColor=n;float alpha=n.a*m;if(alpha==0.0){discard;}gl_FragColor.a=alpha;}');\n\nexport var vertex = new WebGLVertex(DEBUG_WEBGL ?\n  'varying float v_round;\\nvarying vec2 v_roundVertex;\\nvarying float v_halfWidth;\\n\\n\\nattribute vec2 a_lastPos;\\nattribute vec2 a_position;\\nattribute vec2 a_nextPos;\\nattribute float a_direction;\\n\\nuniform mat4 u_projectionMatrix;\\nuniform mat4 u_offsetScaleMatrix;\\nuniform mat4 u_offsetRotateMatrix;\\nuniform float u_lineWidth;\\nuniform float u_miterLimit;\\n\\nbool nearlyEquals(in float value, in float ref) {\\n  float epsilon = 0.000000000001;\\n  return value >= ref - epsilon && value <= ref + epsilon;\\n}\\n\\nvoid alongNormal(out vec2 offset, in vec2 nextP, in float turnDir, in float direction) {\\n  vec2 dirVect = nextP - a_position;\\n  vec2 normal = normalize(vec2(-turnDir * dirVect.y, turnDir * dirVect.x));\\n  offset = u_lineWidth / 2.0 * normal * direction;\\n}\\n\\nvoid miterUp(out vec2 offset, out float round, in bool isRound, in float direction) {\\n  float halfWidth = u_lineWidth / 2.0;\\n  vec2 tangent = normalize(normalize(a_nextPos - a_position) + normalize(a_position - a_lastPos));\\n  vec2 normal = vec2(-tangent.y, tangent.x);\\n  vec2 dirVect = a_nextPos - a_position;\\n  vec2 tmpNormal = normalize(vec2(-dirVect.y, dirVect.x));\\n  float miterLength = abs(halfWidth / dot(normal, tmpNormal));\\n  offset = normal * direction * miterLength;\\n  round = 0.0;\\n  if (isRound) {\\n    round = 1.0;\\n  } else if (miterLength > u_miterLimit + u_lineWidth) {\\n    offset = halfWidth * tmpNormal * direction;\\n  }\\n}\\n\\nbool miterDown(out vec2 offset, in vec4 projPos, in mat4 offsetMatrix, in float direction) {\\n  bool degenerate = false;\\n  vec2 tangent = normalize(normalize(a_nextPos - a_position) + normalize(a_position - a_lastPos));\\n  vec2 normal = vec2(-tangent.y, tangent.x);\\n  vec2 dirVect = a_lastPos - a_position;\\n  vec2 tmpNormal = normalize(vec2(-dirVect.y, dirVect.x));\\n  vec2 longOffset, shortOffset, longVertex;\\n  vec4 shortProjVertex;\\n  float halfWidth = u_lineWidth / 2.0;\\n  if (length(a_nextPos - a_position) > length(a_lastPos - a_position)) {\\n    longOffset = tmpNormal * direction * halfWidth;\\n    shortOffset = normalize(vec2(dirVect.y, -dirVect.x)) * direction * halfWidth;\\n    longVertex = a_nextPos;\\n    shortProjVertex = u_projectionMatrix * vec4(a_lastPos, 0.0, 1.0);\\n  } else {\\n    shortOffset = tmpNormal * direction * halfWidth;\\n    longOffset = normalize(vec2(dirVect.y, -dirVect.x)) * direction * halfWidth;\\n    longVertex = a_lastPos;\\n    shortProjVertex = u_projectionMatrix * vec4(a_nextPos, 0.0, 1.0);\\n  }\\n  //Intersection algorithm based on theory by Paul Bourke (http://paulbourke.net/geometry/pointlineplane/).\\n  vec4 p1 = u_projectionMatrix * vec4(longVertex, 0.0, 1.0) + offsetMatrix * vec4(longOffset, 0.0, 0.0);\\n  vec4 p2 = projPos + offsetMatrix * vec4(longOffset, 0.0, 0.0);\\n  vec4 p3 = shortProjVertex + offsetMatrix * vec4(-shortOffset, 0.0, 0.0);\\n  vec4 p4 = shortProjVertex + offsetMatrix * vec4(shortOffset, 0.0, 0.0);\\n  float denom = (p4.y - p3.y) * (p2.x - p1.x) - (p4.x - p3.x) * (p2.y - p1.y);\\n  float firstU = ((p4.x - p3.x) * (p1.y - p3.y) - (p4.y - p3.y) * (p1.x - p3.x)) / denom;\\n  float secondU = ((p2.x - p1.x) * (p1.y - p3.y) - (p2.y - p1.y) * (p1.x - p3.x)) / denom;\\n  float epsilon = 0.000000000001;\\n  if (firstU > epsilon && firstU < 1.0 - epsilon && secondU > epsilon && secondU < 1.0 - epsilon) {\\n    shortProjVertex.x = p1.x + firstU * (p2.x - p1.x);\\n    shortProjVertex.y = p1.y + firstU * (p2.y - p1.y);\\n    offset = shortProjVertex.xy;\\n    degenerate = true;\\n  } else {\\n    float miterLength = abs(halfWidth / dot(normal, tmpNormal));\\n    offset = normal * direction * miterLength;\\n  }\\n  return degenerate;\\n}\\n\\nvoid squareCap(out vec2 offset, out float round, in bool isRound, in vec2 nextP,\\n    in float turnDir, in float direction) {\\n  round = 0.0;\\n  vec2 dirVect = a_position - nextP;\\n  vec2 firstNormal = normalize(dirVect);\\n  vec2 secondNormal = vec2(turnDir * firstNormal.y * direction, -turnDir * firstNormal.x * direction);\\n  vec2 hypotenuse = normalize(firstNormal - secondNormal);\\n  vec2 normal = vec2(turnDir * hypotenuse.y * direction, -turnDir * hypotenuse.x * direction);\\n  float length = sqrt(v_halfWidth * v_halfWidth * 2.0);\\n  offset = normal * length;\\n  if (isRound) {\\n    round = 1.0;\\n  }\\n}\\n\\nvoid main(void) {\\n  bool degenerate = false;\\n  float direction = float(sign(a_direction));\\n  mat4 offsetMatrix = u_offsetScaleMatrix * u_offsetRotateMatrix;\\n  vec2 offset;\\n  vec4 projPos = u_projectionMatrix * vec4(a_position, 0.0, 1.0);\\n  bool round = nearlyEquals(mod(a_direction, 2.0), 0.0);\\n\\n  v_round = 0.0;\\n  v_halfWidth = u_lineWidth / 2.0;\\n  v_roundVertex = projPos.xy;\\n\\n  if (nearlyEquals(mod(a_direction, 3.0), 0.0) || nearlyEquals(mod(a_direction, 17.0), 0.0)) {\\n    alongNormal(offset, a_nextPos, 1.0, direction);\\n  } else if (nearlyEquals(mod(a_direction, 5.0), 0.0) || nearlyEquals(mod(a_direction, 13.0), 0.0)) {\\n    alongNormal(offset, a_lastPos, -1.0, direction);\\n  } else if (nearlyEquals(mod(a_direction, 23.0), 0.0)) {\\n    miterUp(offset, v_round, round, direction);\\n  } else if (nearlyEquals(mod(a_direction, 19.0), 0.0)) {\\n    degenerate = miterDown(offset, projPos, offsetMatrix, direction);\\n  } else if (nearlyEquals(mod(a_direction, 7.0), 0.0)) {\\n    squareCap(offset, v_round, round, a_nextPos, 1.0, direction);\\n  } else if (nearlyEquals(mod(a_direction, 11.0), 0.0)) {\\n    squareCap(offset, v_round, round, a_lastPos, -1.0, direction);\\n  }\\n  if (!degenerate) {\\n    vec4 offsets = offsetMatrix * vec4(offset, 0.0, 0.0);\\n    gl_Position = projPos + offsets;\\n  } else {\\n    gl_Position = vec4(offset, 0.0, 1.0);\\n  }\\n}\\n\\n\\n' :\n  'varying float a;varying vec2 aVertex;varying float c;attribute vec2 d;attribute vec2 e;attribute vec2 f;attribute float g;uniform mat4 h;uniform mat4 i;uniform mat4 j;uniform float k;uniform float l;bool nearlyEquals(in float value,in float ref){float epsilon=0.000000000001;return value>=ref-epsilon&&value<=ref+epsilon;}void alongNormal(out vec2 offset,in vec2 nextP,in float turnDir,in float direction){vec2 dirVect=nextP-e;vec2 normal=normalize(vec2(-turnDir*dirVect.y,turnDir*dirVect.x));offset=k/2.0*normal*direction;}void miterUp(out vec2 offset,out float round,in bool isRound,in float direction){float halfWidth=k/2.0;vec2 tangent=normalize(normalize(f-e)+normalize(e-d));vec2 normal=vec2(-tangent.y,tangent.x);vec2 dirVect=f-e;vec2 tmpNormal=normalize(vec2(-dirVect.y,dirVect.x));float miterLength=abs(halfWidth/dot(normal,tmpNormal));offset=normal*direction*miterLength;round=0.0;if(isRound){round=1.0;}else if(miterLength>l+k){offset=halfWidth*tmpNormal*direction;}} bool miterDown(out vec2 offset,in vec4 projPos,in mat4 offsetMatrix,in float direction){bool degenerate=false;vec2 tangent=normalize(normalize(f-e)+normalize(e-d));vec2 normal=vec2(-tangent.y,tangent.x);vec2 dirVect=d-e;vec2 tmpNormal=normalize(vec2(-dirVect.y,dirVect.x));vec2 longOffset,shortOffset,longVertex;vec4 shortProjVertex;float halfWidth=k/2.0;if(length(f-e)>length(d-e)){longOffset=tmpNormal*direction*halfWidth;shortOffset=normalize(vec2(dirVect.y,-dirVect.x))*direction*halfWidth;longVertex=f;shortProjVertex=h*vec4(d,0.0,1.0);}else{shortOffset=tmpNormal*direction*halfWidth;longOffset=normalize(vec2(dirVect.y,-dirVect.x))*direction*halfWidth;longVertex=d;shortProjVertex=h*vec4(f,0.0,1.0);}vec4 p1=h*vec4(longVertex,0.0,1.0)+offsetMatrix*vec4(longOffset,0.0,0.0);vec4 p2=projPos+offsetMatrix*vec4(longOffset,0.0,0.0);vec4 p3=shortProjVertex+offsetMatrix*vec4(-shortOffset,0.0,0.0);vec4 p4=shortProjVertex+offsetMatrix*vec4(shortOffset,0.0,0.0);float denom=(p4.y-p3.y)*(p2.x-p1.x)-(p4.x-p3.x)*(p2.y-p1.y);float firstU=((p4.x-p3.x)*(p1.y-p3.y)-(p4.y-p3.y)*(p1.x-p3.x))/denom;float secondU=((p2.x-p1.x)*(p1.y-p3.y)-(p2.y-p1.y)*(p1.x-p3.x))/denom;float epsilon=0.000000000001;if(firstU>epsilon&&firstU<1.0-epsilon&&secondU>epsilon&&secondU<1.0-epsilon){shortProjVertex.x=p1.x+firstU*(p2.x-p1.x);shortProjVertex.y=p1.y+firstU*(p2.y-p1.y);offset=shortProjVertex.xy;degenerate=true;}else{float miterLength=abs(halfWidth/dot(normal,tmpNormal));offset=normal*direction*miterLength;}return degenerate;}void squareCap(out vec2 offset,out float round,in bool isRound,in vec2 nextP,in float turnDir,in float direction){round=0.0;vec2 dirVect=e-nextP;vec2 firstNormal=normalize(dirVect);vec2 secondNormal=vec2(turnDir*firstNormal.y*direction,-turnDir*firstNormal.x*direction);vec2 hypotenuse=normalize(firstNormal-secondNormal);vec2 normal=vec2(turnDir*hypotenuse.y*direction,-turnDir*hypotenuse.x*direction);float length=sqrt(c*c*2.0);offset=normal*length;if(isRound){round=1.0;}} void main(void){bool degenerate=false;float direction=float(sign(g));mat4 offsetMatrix=i*j;vec2 offset;vec4 projPos=h*vec4(e,0.0,1.0);bool round=nearlyEquals(mod(g,2.0),0.0);a=0.0;c=k/2.0;aVertex=projPos.xy;if(nearlyEquals(mod(g,3.0),0.0)||nearlyEquals(mod(g,17.0),0.0)){alongNormal(offset,f,1.0,direction);}else if(nearlyEquals(mod(g,5.0),0.0)||nearlyEquals(mod(g,13.0),0.0)){alongNormal(offset,d,-1.0,direction);}else if(nearlyEquals(mod(g,23.0),0.0)){miterUp(offset,a,round,direction);}else if(nearlyEquals(mod(g,19.0),0.0)){degenerate=miterDown(offset,projPos,offsetMatrix,direction);}else if(nearlyEquals(mod(g,7.0),0.0)){squareCap(offset,a,round,f,1.0,direction);}else if(nearlyEquals(mod(g,11.0),0.0)){squareCap(offset,a,round,d,-1.0,direction);}if(!degenerate){vec4 offsets=offsetMatrix*vec4(offset,0.0,0.0);gl_Position=projPos+offsets;}else{gl_Position=vec4(offset,0.0,1.0);}}');\n\n//# sourceMappingURL=defaultshader.js.map","/**\n * @module ol/render/webgl/linestringreplay/defaultshader/Locations\n */\n// This file is automatically generated, do not edit\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../../webgl.js';\n\nvar Locations = function Locations(gl, program) {\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_projectionMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_projectionMatrix' : 'h');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_offsetScaleMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_offsetScaleMatrix' : 'i');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_offsetRotateMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_offsetRotateMatrix' : 'j');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_lineWidth = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_lineWidth' : 'k');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_miterLimit = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_miterLimit' : 'l');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_opacity = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_opacity' : 'm');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_color = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_color' : 'n');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_size = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_size' : 'o');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_pixelRatio = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_pixelRatio' : 'p');\n\n  /**\n   * @type {number}\n   */\n  this.a_lastPos = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_lastPos' : 'd');\n\n  /**\n   * @type {number}\n   */\n  this.a_position = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_position' : 'e');\n\n  /**\n   * @type {number}\n   */\n  this.a_nextPos = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_nextPos' : 'f');\n\n  /**\n   * @type {number}\n   */\n  this.a_direction = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_direction' : 'g');\n\n};\n\nexport default Locations;\n\n//# sourceMappingURL=Locations.js.map","/**\n * @module ol/render/webgl/LineStringReplay\n */\nimport {getUid} from '../../util.js';\nimport {equals} from '../../array.js';\nimport {asArray} from '../../color.js';\nimport {intersects} from '../../extent.js';\nimport {linearRingIsClockwise} from '../../geom/flat/orient.js';\nimport {translate} from '../../geom/flat/transform.js';\nimport {lineStringIsClosed} from '../../geom/flat/topology.js';\nimport {isEmpty} from '../../obj.js';\nimport {DEFAULT_LINECAP, DEFAULT_LINEDASH, DEFAULT_LINEDASHOFFSET,\n  DEFAULT_LINEJOIN, DEFAULT_LINEWIDTH, DEFAULT_MITERLIMIT, DEFAULT_STROKESTYLE,\n  triangleIsCounterClockwise} from '../webgl.js';\nimport WebGLReplay from './Replay.js';\nimport {fragment, vertex} from './linestringreplay/defaultshader.js';\nimport Locations from './linestringreplay/defaultshader/Locations.js';\nimport {FLOAT} from '../../webgl.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\n\n\n/**\n * @enum {number}\n */\nvar Instruction = {\n  ROUND: 2,\n  BEGIN_LINE: 3,\n  END_LINE: 5,\n  BEGIN_LINE_CAP: 7,\n  END_LINE_CAP: 11,\n  BEVEL_FIRST: 13,\n  BEVEL_SECOND: 17,\n  MITER_BOTTOM: 19,\n  MITER_TOP: 23\n};\n\n\nvar WebGLLineStringReplay = /*@__PURE__*/(function (WebGLReplay) {\n  function WebGLLineStringReplay(tolerance, maxExtent) {\n    WebGLReplay.call(this, tolerance, maxExtent);\n\n    /**\n     * @private\n     * @type {import(\"./linestringreplay/defaultshader/Locations.js\").default}\n     */\n    this.defaultLocations_ = null;\n\n    /**\n     * @private\n     * @type {Array<Array<?>>}\n     */\n    this.styles_ = [];\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.styleIndices_ = [];\n\n    /**\n     * @private\n     * @type {{strokeColor: (Array<number>|null),\n     *         lineCap: (string|undefined),\n     *         lineDash: Array<number>,\n     *         lineDashOffset: (number|undefined),\n     *         lineJoin: (string|undefined),\n     *         lineWidth: (number|undefined),\n     *         miterLimit: (number|undefined),\n     *         changed: boolean}|null}\n     */\n    this.state_ = {\n      strokeColor: null,\n      lineCap: undefined,\n      lineDash: null,\n      lineDashOffset: undefined,\n      lineJoin: undefined,\n      lineWidth: undefined,\n      miterLimit: undefined,\n      changed: false\n    };\n\n  }\n\n  if ( WebGLReplay ) WebGLLineStringReplay.__proto__ = WebGLReplay;\n  WebGLLineStringReplay.prototype = Object.create( WebGLReplay && WebGLReplay.prototype );\n  WebGLLineStringReplay.prototype.constructor = WebGLLineStringReplay;\n\n  /**\n   * Draw one segment.\n   * @private\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   */\n  WebGLLineStringReplay.prototype.drawCoordinates_ = function drawCoordinates_ (flatCoordinates, offset, end, stride) {\n\n    var i, ii;\n    var numVertices = this.vertices.length;\n    var numIndices = this.indices.length;\n    //To save a vertex, the direction of a point is a product of the sign (1 or -1), a prime from\n    //Instruction, and a rounding factor (1 or 2). If the product is even,\n    //we round it. If it is odd, we don't.\n    var lineJoin = this.state_.lineJoin === 'bevel' ? 0 :\n      this.state_.lineJoin === 'miter' ? 1 : 2;\n    var lineCap = this.state_.lineCap === 'butt' ? 0 :\n      this.state_.lineCap === 'square' ? 1 : 2;\n    var closed = lineStringIsClosed(flatCoordinates, offset, end, stride);\n    var startCoords, sign, n;\n    var lastIndex = numIndices;\n    var lastSign = 1;\n    //We need the adjacent vertices to define normals in joins. p0 = last, p1 = current, p2 = next.\n    var p0, p1, p2;\n\n    for (i = offset, ii = end; i < ii; i += stride) {\n\n      n = numVertices / 7;\n\n      p0 = p1;\n      p1 = p2 || [flatCoordinates[i], flatCoordinates[i + 1]];\n      //First vertex.\n      if (i === offset) {\n        p2 = [flatCoordinates[i + stride], flatCoordinates[i + stride + 1]];\n        if (end - offset === stride * 2 && equals(p1, p2)) {\n          break;\n        }\n        if (closed) {\n          //A closed line! Complete the circle.\n          p0 = [flatCoordinates[end - stride * 2],\n            flatCoordinates[end - stride * 2 + 1]];\n\n          startCoords = p2;\n        } else {\n          //Add the first two/four vertices.\n\n          if (lineCap) {\n            numVertices = this.addVertices_([0, 0], p1, p2,\n              lastSign * Instruction.BEGIN_LINE_CAP * lineCap, numVertices);\n\n            numVertices = this.addVertices_([0, 0], p1, p2,\n              -lastSign * Instruction.BEGIN_LINE_CAP * lineCap, numVertices);\n\n            this.indices[numIndices++] = n + 2;\n            this.indices[numIndices++] = n;\n            this.indices[numIndices++] = n + 1;\n\n            this.indices[numIndices++] = n + 1;\n            this.indices[numIndices++] = n + 3;\n            this.indices[numIndices++] = n + 2;\n\n          }\n\n          numVertices = this.addVertices_([0, 0], p1, p2,\n            lastSign * Instruction.BEGIN_LINE * (lineCap || 1), numVertices);\n\n          numVertices = this.addVertices_([0, 0], p1, p2,\n            -lastSign * Instruction.BEGIN_LINE * (lineCap || 1), numVertices);\n\n          lastIndex = numVertices / 7 - 1;\n\n          continue;\n        }\n      } else if (i === end - stride) {\n        //Last vertex.\n        if (closed) {\n          //Same as the first vertex.\n          p2 = startCoords;\n          break;\n        } else {\n          p0 = p0 || [0, 0];\n\n          numVertices = this.addVertices_(p0, p1, [0, 0],\n            lastSign * Instruction.END_LINE * (lineCap || 1), numVertices);\n\n          numVertices = this.addVertices_(p0, p1, [0, 0],\n            -lastSign * Instruction.END_LINE * (lineCap || 1), numVertices);\n\n          this.indices[numIndices++] = n;\n          this.indices[numIndices++] = lastIndex - 1;\n          this.indices[numIndices++] = lastIndex;\n\n          this.indices[numIndices++] = lastIndex;\n          this.indices[numIndices++] = n + 1;\n          this.indices[numIndices++] = n;\n\n          if (lineCap) {\n            numVertices = this.addVertices_(p0, p1, [0, 0],\n              lastSign * Instruction.END_LINE_CAP * lineCap, numVertices);\n\n            numVertices = this.addVertices_(p0, p1, [0, 0],\n              -lastSign * Instruction.END_LINE_CAP * lineCap, numVertices);\n\n            this.indices[numIndices++] = n + 2;\n            this.indices[numIndices++] = n;\n            this.indices[numIndices++] = n + 1;\n\n            this.indices[numIndices++] = n + 1;\n            this.indices[numIndices++] = n + 3;\n            this.indices[numIndices++] = n + 2;\n\n          }\n\n          break;\n        }\n      } else {\n        p2 = [flatCoordinates[i + stride], flatCoordinates[i + stride + 1]];\n      }\n\n      // We group CW and straight lines, thus the not so inituitive CCW checking function.\n      sign = triangleIsCounterClockwise(p0[0], p0[1], p1[0], p1[1], p2[0], p2[1])\n        ? -1 : 1;\n\n      numVertices = this.addVertices_(p0, p1, p2,\n        sign * Instruction.BEVEL_FIRST * (lineJoin || 1), numVertices);\n\n      numVertices = this.addVertices_(p0, p1, p2,\n        sign * Instruction.BEVEL_SECOND * (lineJoin || 1), numVertices);\n\n      numVertices = this.addVertices_(p0, p1, p2,\n        -sign * Instruction.MITER_BOTTOM * (lineJoin || 1), numVertices);\n\n      if (i > offset) {\n        this.indices[numIndices++] = n;\n        this.indices[numIndices++] = lastIndex - 1;\n        this.indices[numIndices++] = lastIndex;\n\n        this.indices[numIndices++] = n + 2;\n        this.indices[numIndices++] = n;\n        this.indices[numIndices++] = lastSign * sign > 0 ? lastIndex : lastIndex - 1;\n      }\n\n      this.indices[numIndices++] = n;\n      this.indices[numIndices++] = n + 2;\n      this.indices[numIndices++] = n + 1;\n\n      lastIndex = n + 2;\n      lastSign = sign;\n\n      //Add miter\n      if (lineJoin) {\n        numVertices = this.addVertices_(p0, p1, p2,\n          sign * Instruction.MITER_TOP * lineJoin, numVertices);\n\n        this.indices[numIndices++] = n + 1;\n        this.indices[numIndices++] = n + 3;\n        this.indices[numIndices++] = n;\n      }\n    }\n\n    if (closed) {\n      n = n || numVertices / 7;\n      sign = linearRingIsClockwise([p0[0], p0[1], p1[0], p1[1], p2[0], p2[1]], 0, 6, 2)\n        ? 1 : -1;\n\n      numVertices = this.addVertices_(p0, p1, p2,\n        sign * Instruction.BEVEL_FIRST * (lineJoin || 1), numVertices);\n\n      numVertices = this.addVertices_(p0, p1, p2,\n        -sign * Instruction.MITER_BOTTOM * (lineJoin || 1), numVertices);\n\n      this.indices[numIndices++] = n;\n      this.indices[numIndices++] = lastIndex - 1;\n      this.indices[numIndices++] = lastIndex;\n\n      this.indices[numIndices++] = n + 1;\n      this.indices[numIndices++] = n;\n      this.indices[numIndices++] = lastSign * sign > 0 ? lastIndex : lastIndex - 1;\n    }\n  };\n\n  /**\n   * @param {Array<number>} p0 Last coordinates.\n   * @param {Array<number>} p1 Current coordinates.\n   * @param {Array<number>} p2 Next coordinates.\n   * @param {number} product Sign, instruction, and rounding product.\n   * @param {number} numVertices Vertex counter.\n   * @return {number} Vertex counter.\n   * @private\n   */\n  WebGLLineStringReplay.prototype.addVertices_ = function addVertices_ (p0, p1, p2, product, numVertices) {\n    this.vertices[numVertices++] = p0[0];\n    this.vertices[numVertices++] = p0[1];\n    this.vertices[numVertices++] = p1[0];\n    this.vertices[numVertices++] = p1[1];\n    this.vertices[numVertices++] = p2[0];\n    this.vertices[numVertices++] = p2[1];\n    this.vertices[numVertices++] = product;\n\n    return numVertices;\n  };\n\n  /**\n   * Check if the linestring can be drawn (i. e. valid).\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @return {boolean} The linestring can be drawn.\n   * @private\n   */\n  WebGLLineStringReplay.prototype.isValid_ = function isValid_ (flatCoordinates, offset, end, stride) {\n    var range = end - offset;\n    if (range < stride * 2) {\n      return false;\n    } else if (range === stride * 2) {\n      var firstP = [flatCoordinates[offset], flatCoordinates[offset + 1]];\n      var lastP = [flatCoordinates[offset + stride], flatCoordinates[offset + stride + 1]];\n      return !equals(firstP, lastP);\n    }\n\n    return true;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLLineStringReplay.prototype.drawLineString = function drawLineString (lineStringGeometry, feature) {\n    var flatCoordinates = lineStringGeometry.getFlatCoordinates();\n    var stride = lineStringGeometry.getStride();\n    if (this.isValid_(flatCoordinates, 0, flatCoordinates.length, stride)) {\n      flatCoordinates = translate(flatCoordinates, 0, flatCoordinates.length,\n        stride, -this.origin[0], -this.origin[1]);\n      if (this.state_.changed) {\n        this.styleIndices_.push(this.indices.length);\n        this.state_.changed = false;\n      }\n      this.startIndices.push(this.indices.length);\n      this.startIndicesFeature.push(feature);\n      this.drawCoordinates_(\n        flatCoordinates, 0, flatCoordinates.length, stride);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLLineStringReplay.prototype.drawMultiLineString = function drawMultiLineString (multiLineStringGeometry, feature) {\n    var indexCount = this.indices.length;\n    var ends = multiLineStringGeometry.getEnds();\n    ends.unshift(0);\n    var flatCoordinates = multiLineStringGeometry.getFlatCoordinates();\n    var stride = multiLineStringGeometry.getStride();\n    var i, ii;\n    if (ends.length > 1) {\n      for (i = 1, ii = ends.length; i < ii; ++i) {\n        if (this.isValid_(flatCoordinates, ends[i - 1], ends[i], stride)) {\n          var lineString = translate(flatCoordinates, ends[i - 1], ends[i],\n            stride, -this.origin[0], -this.origin[1]);\n          this.drawCoordinates_(\n            lineString, 0, lineString.length, stride);\n        }\n      }\n    }\n    if (this.indices.length > indexCount) {\n      this.startIndices.push(indexCount);\n      this.startIndicesFeature.push(feature);\n      if (this.state_.changed) {\n        this.styleIndices_.push(indexCount);\n        this.state_.changed = false;\n      }\n    }\n  };\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {Array<Array<number>>} holeFlatCoordinates Hole flat coordinates.\n   * @param {number} stride Stride.\n   */\n  WebGLLineStringReplay.prototype.drawPolygonCoordinates = function drawPolygonCoordinates (flatCoordinates, holeFlatCoordinates, stride) {\n    if (!lineStringIsClosed(flatCoordinates, 0, flatCoordinates.length, stride)) {\n      flatCoordinates.push(flatCoordinates[0]);\n      flatCoordinates.push(flatCoordinates[1]);\n    }\n    this.drawCoordinates_(flatCoordinates, 0, flatCoordinates.length, stride);\n    if (holeFlatCoordinates.length) {\n      var i, ii;\n      for (i = 0, ii = holeFlatCoordinates.length; i < ii; ++i) {\n        if (!lineStringIsClosed(holeFlatCoordinates[i], 0, holeFlatCoordinates[i].length, stride)) {\n          holeFlatCoordinates[i].push(holeFlatCoordinates[i][0]);\n          holeFlatCoordinates[i].push(holeFlatCoordinates[i][1]);\n        }\n        this.drawCoordinates_(holeFlatCoordinates[i], 0,\n          holeFlatCoordinates[i].length, stride);\n      }\n    }\n  };\n\n  /**\n   * @param {import(\"../../Feature.js\").default|import(\"../Feature.js\").default} feature Feature.\n   * @param {number=} opt_index Index count.\n   */\n  WebGLLineStringReplay.prototype.setPolygonStyle = function setPolygonStyle (feature, opt_index) {\n    var index = opt_index === undefined ? this.indices.length : opt_index;\n    this.startIndices.push(index);\n    this.startIndicesFeature.push(feature);\n    if (this.state_.changed) {\n      this.styleIndices_.push(index);\n      this.state_.changed = false;\n    }\n  };\n\n  /**\n   * @return {number} Current index.\n   */\n  WebGLLineStringReplay.prototype.getCurrentIndex = function getCurrentIndex () {\n    return this.indices.length;\n  };\n\n  /**\n   * @inheritDoc\n   **/\n  WebGLLineStringReplay.prototype.finish = function finish (context) {\n    // create, bind, and populate the vertices buffer\n    this.verticesBuffer = new WebGLBuffer(this.vertices);\n\n    // create, bind, and populate the indices buffer\n    this.indicesBuffer = new WebGLBuffer(this.indices);\n\n    this.startIndices.push(this.indices.length);\n\n    //Clean up, if there is nothing to draw\n    if (this.styleIndices_.length === 0 && this.styles_.length > 0) {\n      this.styles_ = [];\n    }\n\n    this.vertices = null;\n    this.indices = null;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLLineStringReplay.prototype.getDeleteResourcesFunction = function getDeleteResourcesFunction (context) {\n    var verticesBuffer = this.verticesBuffer;\n    var indicesBuffer = this.indicesBuffer;\n    return function() {\n      context.deleteBuffer(verticesBuffer);\n      context.deleteBuffer(indicesBuffer);\n    };\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLLineStringReplay.prototype.setUpProgram = function setUpProgram (gl, context, size, pixelRatio) {\n    // get the program\n    var program = context.getProgram(fragment, vertex);\n\n    // get the locations\n    var locations;\n    if (!this.defaultLocations_) {\n      locations = new Locations(gl, program);\n      this.defaultLocations_ = locations;\n    } else {\n      locations = this.defaultLocations_;\n    }\n\n    context.useProgram(program);\n\n    // enable the vertex attrib arrays\n    gl.enableVertexAttribArray(locations.a_lastPos);\n    gl.vertexAttribPointer(locations.a_lastPos, 2, FLOAT,\n      false, 28, 0);\n\n    gl.enableVertexAttribArray(locations.a_position);\n    gl.vertexAttribPointer(locations.a_position, 2, FLOAT,\n      false, 28, 8);\n\n    gl.enableVertexAttribArray(locations.a_nextPos);\n    gl.vertexAttribPointer(locations.a_nextPos, 2, FLOAT,\n      false, 28, 16);\n\n    gl.enableVertexAttribArray(locations.a_direction);\n    gl.vertexAttribPointer(locations.a_direction, 1, FLOAT,\n      false, 28, 24);\n\n    // Enable renderer specific uniforms.\n    gl.uniform2fv(locations.u_size, size);\n    gl.uniform1f(locations.u_pixelRatio, pixelRatio);\n\n    return locations;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLLineStringReplay.prototype.shutDownProgram = function shutDownProgram (gl, locations) {\n    gl.disableVertexAttribArray(locations.a_lastPos);\n    gl.disableVertexAttribArray(locations.a_position);\n    gl.disableVertexAttribArray(locations.a_nextPos);\n    gl.disableVertexAttribArray(locations.a_direction);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLLineStringReplay.prototype.drawReplay = function drawReplay (gl, context, skippedFeaturesHash, hitDetection) {\n    //Save GL parameters.\n    var tmpDepthFunc = /** @type {number} */ (gl.getParameter(gl.DEPTH_FUNC));\n    var tmpDepthMask = /** @type {boolean} */ (gl.getParameter(gl.DEPTH_WRITEMASK));\n\n    if (!hitDetection) {\n      gl.enable(gl.DEPTH_TEST);\n      gl.depthMask(true);\n      gl.depthFunc(gl.NOTEQUAL);\n    }\n\n    if (!isEmpty(skippedFeaturesHash)) {\n      this.drawReplaySkipping_(gl, context, skippedFeaturesHash);\n    } else {\n      //Draw by style groups to minimize drawElements() calls.\n      var i, start, end, nextStyle;\n      end = this.startIndices[this.startIndices.length - 1];\n      for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n        start = this.styleIndices_[i];\n        nextStyle = this.styles_[i];\n        this.setStrokeStyle_(gl, nextStyle[0], nextStyle[1], nextStyle[2]);\n        this.drawElements(gl, context, start, end);\n        gl.clear(gl.DEPTH_BUFFER_BIT);\n        end = start;\n      }\n    }\n    if (!hitDetection) {\n      gl.disable(gl.DEPTH_TEST);\n      gl.clear(gl.DEPTH_BUFFER_BIT);\n      //Restore GL parameters.\n      gl.depthMask(tmpDepthMask);\n      gl.depthFunc(tmpDepthFunc);\n    }\n  };\n\n  /**\n   * @private\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {Object} skippedFeaturesHash Ids of features to skip.\n   */\n  WebGLLineStringReplay.prototype.drawReplaySkipping_ = function drawReplaySkipping_ (gl, context, skippedFeaturesHash) {\n    var i, start, end, nextStyle, groupStart, feature, featureIndex, featureStart;\n    featureIndex = this.startIndices.length - 2;\n    end = start = this.startIndices[featureIndex + 1];\n    for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n      nextStyle = this.styles_[i];\n      this.setStrokeStyle_(gl, nextStyle[0], nextStyle[1], nextStyle[2]);\n      groupStart = this.styleIndices_[i];\n\n      while (featureIndex >= 0 &&\n          this.startIndices[featureIndex] >= groupStart) {\n        featureStart = this.startIndices[featureIndex];\n        feature = this.startIndicesFeature[featureIndex];\n\n        if (skippedFeaturesHash[getUid(feature)]) {\n          if (start !== end) {\n            this.drawElements(gl, context, start, end);\n            gl.clear(gl.DEPTH_BUFFER_BIT);\n          }\n          end = featureStart;\n        }\n        featureIndex--;\n        start = featureStart;\n      }\n      if (start !== end) {\n        this.drawElements(gl, context, start, end);\n        gl.clear(gl.DEPTH_BUFFER_BIT);\n      }\n      start = end = groupStart;\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLLineStringReplay.prototype.drawHitDetectionReplayOneByOne = function drawHitDetectionReplayOneByOne (gl, context, skippedFeaturesHash, featureCallback, opt_hitExtent) {\n    var i, start, end, nextStyle, groupStart, feature, featureIndex;\n    featureIndex = this.startIndices.length - 2;\n    end = this.startIndices[featureIndex + 1];\n    for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n      nextStyle = this.styles_[i];\n      this.setStrokeStyle_(gl, nextStyle[0], nextStyle[1], nextStyle[2]);\n      groupStart = this.styleIndices_[i];\n\n      while (featureIndex >= 0 &&\n          this.startIndices[featureIndex] >= groupStart) {\n        start = this.startIndices[featureIndex];\n        feature = this.startIndicesFeature[featureIndex];\n\n        if (skippedFeaturesHash[getUid(feature)] === undefined &&\n            feature.getGeometry() &&\n            (opt_hitExtent === undefined || intersects(\n              /** @type {Array<number>} */ (opt_hitExtent),\n              feature.getGeometry().getExtent()))) {\n          gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);\n          this.drawElements(gl, context, start, end);\n\n          var result = featureCallback(feature);\n\n          if (result) {\n            return result;\n          }\n\n        }\n        featureIndex--;\n        end = start;\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * @private\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {Array<number>} color Color.\n   * @param {number} lineWidth Line width.\n   * @param {number} miterLimit Miter limit.\n   */\n  WebGLLineStringReplay.prototype.setStrokeStyle_ = function setStrokeStyle_ (gl, color, lineWidth, miterLimit) {\n    gl.uniform4fv(this.defaultLocations_.u_color, color);\n    gl.uniform1f(this.defaultLocations_.u_lineWidth, lineWidth);\n    gl.uniform1f(this.defaultLocations_.u_miterLimit, miterLimit);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLLineStringReplay.prototype.setFillStrokeStyle = function setFillStrokeStyle (fillStyle, strokeStyle) {\n    var strokeStyleLineCap = strokeStyle.getLineCap();\n    this.state_.lineCap = strokeStyleLineCap !== undefined ?\n      strokeStyleLineCap : DEFAULT_LINECAP;\n    var strokeStyleLineDash = strokeStyle.getLineDash();\n    this.state_.lineDash = strokeStyleLineDash ?\n      strokeStyleLineDash : DEFAULT_LINEDASH;\n    var strokeStyleLineDashOffset = strokeStyle.getLineDashOffset();\n    this.state_.lineDashOffset = strokeStyleLineDashOffset ?\n      strokeStyleLineDashOffset : DEFAULT_LINEDASHOFFSET;\n    var strokeStyleLineJoin = strokeStyle.getLineJoin();\n    this.state_.lineJoin = strokeStyleLineJoin !== undefined ?\n      strokeStyleLineJoin : DEFAULT_LINEJOIN;\n    var strokeStyleColor = strokeStyle.getColor();\n    if (!(strokeStyleColor instanceof CanvasGradient) &&\n        !(strokeStyleColor instanceof CanvasPattern)) {\n      strokeStyleColor = asArray(strokeStyleColor).map(function(c, i) {\n        return i != 3 ? c / 255 : c;\n      }) || DEFAULT_STROKESTYLE;\n    } else {\n      strokeStyleColor = DEFAULT_STROKESTYLE;\n    }\n    var strokeStyleWidth = strokeStyle.getWidth();\n    strokeStyleWidth = strokeStyleWidth !== undefined ?\n      strokeStyleWidth : DEFAULT_LINEWIDTH;\n    var strokeStyleMiterLimit = strokeStyle.getMiterLimit();\n    strokeStyleMiterLimit = strokeStyleMiterLimit !== undefined ?\n      strokeStyleMiterLimit : DEFAULT_MITERLIMIT;\n    if (!this.state_.strokeColor || !equals(this.state_.strokeColor, strokeStyleColor) ||\n        this.state_.lineWidth !== strokeStyleWidth || this.state_.miterLimit !== strokeStyleMiterLimit) {\n      this.state_.changed = true;\n      this.state_.strokeColor = strokeStyleColor;\n      this.state_.lineWidth = strokeStyleWidth;\n      this.state_.miterLimit = strokeStyleMiterLimit;\n      this.styles_.push([strokeStyleColor, strokeStyleWidth, strokeStyleMiterLimit]);\n    }\n  };\n\n  return WebGLLineStringReplay;\n}(WebGLReplay));\n\n\nexport default WebGLLineStringReplay;\n\n//# sourceMappingURL=LineStringReplay.js.map","/**\n * @module ol/render/webgl/polygonreplay/defaultshader\n */\n// This file is automatically generated, do not edit.\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../webgl.js';\nimport WebGLFragment from '../../../webgl/Fragment.js';\nimport WebGLVertex from '../../../webgl/Vertex.js';\n\nexport var fragment = new WebGLFragment(DEBUG_WEBGL ?\n  'precision mediump float;\\n\\n\\n\\nuniform vec4 u_color;\\nuniform float u_opacity;\\n\\nvoid main(void) {\\n  gl_FragColor = u_color;\\n  float alpha = u_color.a * u_opacity;\\n  if (alpha == 0.0) {\\n    discard;\\n  }\\n  gl_FragColor.a = alpha;\\n}\\n' :\n  'precision mediump float;uniform vec4 e;uniform float f;void main(void){gl_FragColor=e;float alpha=e.a*f;if(alpha==0.0){discard;}gl_FragColor.a=alpha;}');\n\nexport var vertex = new WebGLVertex(DEBUG_WEBGL ?\n  '\\n\\nattribute vec2 a_position;\\n\\nuniform mat4 u_projectionMatrix;\\nuniform mat4 u_offsetScaleMatrix;\\nuniform mat4 u_offsetRotateMatrix;\\n\\nvoid main(void) {\\n  gl_Position = u_projectionMatrix * vec4(a_position, 0.0, 1.0);\\n}\\n\\n\\n' :\n  'attribute vec2 a;uniform mat4 b;uniform mat4 c;uniform mat4 d;void main(void){gl_Position=b*vec4(a,0.0,1.0);}');\n\n//# sourceMappingURL=defaultshader.js.map","/**\n * @module ol/render/webgl/polygonreplay/defaultshader/Locations\n */\n// This file is automatically generated, do not edit\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../../webgl.js';\n\nvar Locations = function Locations(gl, program) {\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_projectionMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_projectionMatrix' : 'b');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_offsetScaleMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_offsetScaleMatrix' : 'c');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_offsetRotateMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_offsetRotateMatrix' : 'd');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_color = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_color' : 'e');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_opacity = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_opacity' : 'f');\n\n  /**\n   * @type {number}\n   */\n  this.a_position = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_position' : 'a');\n\n};\n\nexport default Locations;\n\n//# sourceMappingURL=Locations.js.map","/**\n * @module ol/style/Stroke\n */\nimport {getUid} from '../util.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} [color] A color, gradient or pattern.\n * See {@link module:ol/color~Color} and {@link module:ol/colorlike~ColorLike} for possible formats.\n * Default null; if null, the Canvas/renderer default black will be used.\n * @property {string} [lineCap='round'] Line cap style: `butt`, `round`, or `square`.\n * @property {string} [lineJoin='round'] Line join style: `bevel`, `round`, or `miter`.\n * @property {Array<number>} [lineDash] Line dash pattern. Default is `undefined` (no dash).\n * Please note that Internet Explorer 10 and lower do not support the `setLineDash` method on\n * the `CanvasRenderingContext2D` and therefore this option will have no visual effect in these browsers.\n * @property {number} [lineDashOffset=0] Line dash offset.\n * @property {number} [miterLimit=10] Miter limit.\n * @property {number} [width] Width.\n */\n\n\n/**\n * @classdesc\n * Set stroke style for vector features.\n * Note that the defaults given are the Canvas defaults, which will be used if\n * option is not defined. The `get` functions return whatever was entered in\n * the options; they will not return the default.\n * @api\n */\nvar Stroke = function Stroke(opt_options) {\n\n  var options = opt_options || {};\n\n  /**\n   * @private\n   * @type {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike}\n   */\n  this.color_ = options.color !== undefined ? options.color : null;\n\n  /**\n   * @private\n   * @type {string|undefined}\n   */\n  this.lineCap_ = options.lineCap;\n\n  /**\n   * @private\n   * @type {Array<number>}\n   */\n  this.lineDash_ = options.lineDash !== undefined ? options.lineDash : null;\n\n  /**\n   * @private\n   * @type {number|undefined}\n   */\n  this.lineDashOffset_ = options.lineDashOffset;\n\n  /**\n   * @private\n   * @type {string|undefined}\n   */\n  this.lineJoin_ = options.lineJoin;\n\n  /**\n   * @private\n   * @type {number|undefined}\n   */\n  this.miterLimit_ = options.miterLimit;\n\n  /**\n   * @private\n   * @type {number|undefined}\n   */\n  this.width_ = options.width;\n\n  /**\n   * @private\n   * @type {string|undefined}\n   */\n  this.checksum_ = undefined;\n};\n\n/**\n * Clones the style.\n * @return {Stroke} The cloned style.\n * @api\n */\nStroke.prototype.clone = function clone () {\n  var color = this.getColor();\n  return new Stroke({\n    color: Array.isArray(color) ? color.slice() : color || undefined,\n    lineCap: this.getLineCap(),\n    lineDash: this.getLineDash() ? this.getLineDash().slice() : undefined,\n    lineDashOffset: this.getLineDashOffset(),\n    lineJoin: this.getLineJoin(),\n    miterLimit: this.getMiterLimit(),\n    width: this.getWidth()\n  });\n};\n\n/**\n * Get the stroke color.\n * @return {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} Color.\n * @api\n */\nStroke.prototype.getColor = function getColor () {\n  return this.color_;\n};\n\n/**\n * Get the line cap type for the stroke.\n * @return {string|undefined} Line cap.\n * @api\n */\nStroke.prototype.getLineCap = function getLineCap () {\n  return this.lineCap_;\n};\n\n/**\n * Get the line dash style for the stroke.\n * @return {Array<number>} Line dash.\n * @api\n */\nStroke.prototype.getLineDash = function getLineDash () {\n  return this.lineDash_;\n};\n\n/**\n * Get the line dash offset for the stroke.\n * @return {number|undefined} Line dash offset.\n * @api\n */\nStroke.prototype.getLineDashOffset = function getLineDashOffset () {\n  return this.lineDashOffset_;\n};\n\n/**\n * Get the line join type for the stroke.\n * @return {string|undefined} Line join.\n * @api\n */\nStroke.prototype.getLineJoin = function getLineJoin () {\n  return this.lineJoin_;\n};\n\n/**\n * Get the miter limit for the stroke.\n * @return {number|undefined} Miter limit.\n * @api\n */\nStroke.prototype.getMiterLimit = function getMiterLimit () {\n  return this.miterLimit_;\n};\n\n/**\n * Get the stroke width.\n * @return {number|undefined} Width.\n * @api\n */\nStroke.prototype.getWidth = function getWidth () {\n  return this.width_;\n};\n\n/**\n * Set the color.\n *\n * @param {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} color Color.\n * @api\n */\nStroke.prototype.setColor = function setColor (color) {\n  this.color_ = color;\n  this.checksum_ = undefined;\n};\n\n/**\n * Set the line cap.\n *\n * @param {string|undefined} lineCap Line cap.\n * @api\n */\nStroke.prototype.setLineCap = function setLineCap (lineCap) {\n  this.lineCap_ = lineCap;\n  this.checksum_ = undefined;\n};\n\n/**\n * Set the line dash.\n *\n * Please note that Internet Explorer 10 and lower [do not support][mdn] the\n * `setLineDash` method on the `CanvasRenderingContext2D` and therefore this\n * property will have no visual effect in these browsers.\n *\n * [mdn]: https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/setLineDash#Browser_compatibility\n *\n * @param {Array<number>} lineDash Line dash.\n * @api\n */\nStroke.prototype.setLineDash = function setLineDash (lineDash) {\n  this.lineDash_ = lineDash;\n  this.checksum_ = undefined;\n};\n\n/**\n * Set the line dash offset.\n *\n * @param {number|undefined} lineDashOffset Line dash offset.\n * @api\n */\nStroke.prototype.setLineDashOffset = function setLineDashOffset (lineDashOffset) {\n  this.lineDashOffset_ = lineDashOffset;\n  this.checksum_ = undefined;\n};\n\n/**\n * Set the line join.\n *\n * @param {string|undefined} lineJoin Line join.\n * @api\n */\nStroke.prototype.setLineJoin = function setLineJoin (lineJoin) {\n  this.lineJoin_ = lineJoin;\n  this.checksum_ = undefined;\n};\n\n/**\n * Set the miter limit.\n *\n * @param {number|undefined} miterLimit Miter limit.\n * @api\n */\nStroke.prototype.setMiterLimit = function setMiterLimit (miterLimit) {\n  this.miterLimit_ = miterLimit;\n  this.checksum_ = undefined;\n};\n\n/**\n * Set the width.\n *\n * @param {number|undefined} width Width.\n * @api\n */\nStroke.prototype.setWidth = function setWidth (width) {\n  this.width_ = width;\n  this.checksum_ = undefined;\n};\n\n/**\n * @return {string} The checksum.\n */\nStroke.prototype.getChecksum = function getChecksum () {\n  if (this.checksum_ === undefined) {\n    this.checksum_ = 's';\n    if (this.color_) {\n      if (typeof this.color_ === 'string') {\n        this.checksum_ += this.color_;\n      } else {\n        this.checksum_ += getUid(this.color_);\n      }\n    } else {\n      this.checksum_ += '-';\n    }\n    this.checksum_ += ',' +\n        (this.lineCap_ !== undefined ?\n          this.lineCap_.toString() : '-') + ',' +\n        (this.lineDash_ ?\n          this.lineDash_.toString() : '-') + ',' +\n        (this.lineDashOffset_ !== undefined ?\n          this.lineDashOffset_ : '-') + ',' +\n        (this.lineJoin_ !== undefined ?\n          this.lineJoin_ : '-') + ',' +\n        (this.miterLimit_ !== undefined ?\n          this.miterLimit_.toString() : '-') + ',' +\n        (this.width_ !== undefined ?\n          this.width_.toString() : '-');\n  }\n\n  return this.checksum_;\n};\n\nexport default Stroke;\n\n//# sourceMappingURL=Stroke.js.map","/**\n * @module ol/structs/LinkedList\n */\n\n\n/**\n * @typedef {Object} Item\n * @property {Item} [prev]\n * @property {Item} [next]\n * @property {?} data\n */\n\n/**\n * @classdesc\n * Creates an empty linked list structure.\n */\nvar LinkedList = function LinkedList(opt_circular) {\n\n  /**\n   * @private\n   * @type {Item|undefined}\n   */\n  this.first_;\n\n  /**\n   * @private\n   * @type {Item|undefined}\n   */\n  this.last_;\n\n  /**\n   * @private\n   * @type {Item|undefined}\n   */\n  this.head_;\n\n  /**\n   * @private\n   * @type {boolean}\n   */\n  this.circular_ = opt_circular === undefined ? true : opt_circular;\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.length_ = 0;\n\n};\n\n/**\n * Inserts an item into the linked list right after the current one.\n *\n * @param {?} data Item data.\n */\nLinkedList.prototype.insertItem = function insertItem (data) {\n\n  /** @type {Item} */\n  var item = {\n    prev: undefined,\n    next: undefined,\n    data: data\n  };\n\n  var head = this.head_;\n\n  //Initialize the list.\n  if (!head) {\n    this.first_ = item;\n    this.last_ = item;\n    if (this.circular_) {\n      item.next = item;\n      item.prev = item;\n    }\n  } else {\n    //Link the new item to the adjacent ones.\n    var next = head.next;\n    item.prev = head;\n    item.next = next;\n    head.next = item;\n    if (next) {\n      next.prev = item;\n    }\n\n    if (head === this.last_) {\n      this.last_ = item;\n    }\n  }\n  this.head_ = item;\n  this.length_++;\n};\n\n/**\n * Removes the current item from the list. Sets the cursor to the next item,\n * if possible.\n */\nLinkedList.prototype.removeItem = function removeItem () {\n  var head = this.head_;\n  if (head) {\n    var next = head.next;\n    var prev = head.prev;\n    if (next) {\n      next.prev = prev;\n    }\n    if (prev) {\n      prev.next = next;\n    }\n    this.head_ = next || prev;\n\n    if (this.first_ === this.last_) {\n      this.head_ = undefined;\n      this.first_ = undefined;\n      this.last_ = undefined;\n    } else if (this.first_ === head) {\n      this.first_ = this.head_;\n    } else if (this.last_ === head) {\n      this.last_ = prev ? this.head_.prev : this.head_;\n    }\n    this.length_--;\n  }\n};\n\n/**\n * Sets the cursor to the first item, and returns the associated data.\n *\n * @return {?} Item data.\n */\nLinkedList.prototype.firstItem = function firstItem () {\n  this.head_ = this.first_;\n  if (this.head_) {\n    return this.head_.data;\n  }\n  return undefined;\n};\n\n/**\n* Sets the cursor to the last item, and returns the associated data.\n*\n* @return {?} Item data.\n*/\nLinkedList.prototype.lastItem = function lastItem () {\n  this.head_ = this.last_;\n  if (this.head_) {\n    return this.head_.data;\n  }\n  return undefined;\n};\n\n/**\n * Sets the cursor to the next item, and returns the associated data.\n *\n * @return {?} Item data.\n */\nLinkedList.prototype.nextItem = function nextItem () {\n  if (this.head_ && this.head_.next) {\n    this.head_ = this.head_.next;\n    return this.head_.data;\n  }\n  return undefined;\n};\n\n/**\n * Returns the next item's data without moving the cursor.\n *\n * @return {?} Item data.\n */\nLinkedList.prototype.getNextItem = function getNextItem () {\n  if (this.head_ && this.head_.next) {\n    return this.head_.next.data;\n  }\n  return undefined;\n};\n\n/**\n * Sets the cursor to the previous item, and returns the associated data.\n *\n * @return {?} Item data.\n */\nLinkedList.prototype.prevItem = function prevItem () {\n  if (this.head_ && this.head_.prev) {\n    this.head_ = this.head_.prev;\n    return this.head_.data;\n  }\n  return undefined;\n};\n\n/**\n * Returns the previous item's data without moving the cursor.\n *\n * @return {?} Item data.\n */\nLinkedList.prototype.getPrevItem = function getPrevItem () {\n  if (this.head_ && this.head_.prev) {\n    return this.head_.prev.data;\n  }\n  return undefined;\n};\n\n/**\n * Returns the current item's data.\n *\n * @return {?} Item data.\n */\nLinkedList.prototype.getCurrItem = function getCurrItem () {\n  if (this.head_) {\n    return this.head_.data;\n  }\n  return undefined;\n};\n\n/**\n * Sets the first item of the list. This only works for circular lists, and sets\n * the last item accordingly.\n */\nLinkedList.prototype.setFirstItem = function setFirstItem () {\n  if (this.circular_ && this.head_) {\n    this.first_ = this.head_;\n    this.last_ = this.head_.prev;\n  }\n};\n\n/**\n * Concatenates two lists.\n * @param {LinkedList} list List to merge into the current list.\n */\nLinkedList.prototype.concat = function concat (list) {\n  if (list.head_) {\n    if (this.head_) {\n      var end = this.head_.next;\n      this.head_.next = list.first_;\n      list.first_.prev = this.head_;\n      end.prev = list.last_;\n      list.last_.next = end;\n      this.length_ += list.length_;\n    } else {\n      this.head_ = list.head_;\n      this.first_ = list.first_;\n      this.last_ = list.last_;\n      this.length_ = list.length_;\n    }\n    list.head_ = undefined;\n    list.first_ = undefined;\n    list.last_ = undefined;\n    list.length_ = 0;\n  }\n};\n\n/**\n * Returns the current length of the list.\n *\n * @return {number} Length.\n */\nLinkedList.prototype.getLength = function getLength () {\n  return this.length_;\n};\n\n\nexport default LinkedList;\n\n//# sourceMappingURL=LinkedList.js.map","/**\n * @module ol/structs/RBush\n */\nimport {getUid} from '../util.js';\nimport rbush from 'rbush';\nimport {createOrUpdate, equals} from '../extent.js';\nimport {isEmpty} from '../obj.js';\n\n/**\n * @typedef {Object} Entry\n * @property {number} minX\n * @property {number} minY\n * @property {number} maxX\n * @property {number} maxY\n * @property {Object} [value]\n */\n\n/**\n * @classdesc\n * Wrapper around the RBush by Vladimir Agafonkin.\n * See https://github.com/mourner/rbush.\n *\n * @template T\n */\nvar RBush = function RBush(opt_maxEntries) {\n\n  /**\n   * @private\n   */\n  this.rbush_ = rbush(opt_maxEntries, undefined);\n\n  /**\n   * A mapping between the objects added to this rbush wrapper\n   * and the objects that are actually added to the internal rbush.\n   * @private\n   * @type {Object<string, Entry>}\n   */\n  this.items_ = {};\n\n};\n\n/**\n * Insert a value into the RBush.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {T} value Value.\n */\nRBush.prototype.insert = function insert (extent, value) {\n  /** @type {Entry} */\n  var item = {\n    minX: extent[0],\n    minY: extent[1],\n    maxX: extent[2],\n    maxY: extent[3],\n    value: value\n  };\n\n  this.rbush_.insert(item);\n  this.items_[getUid(value)] = item;\n};\n\n\n/**\n * Bulk-insert values into the RBush.\n * @param {Array<import(\"../extent.js\").Extent>} extents Extents.\n * @param {Array<T>} values Values.\n */\nRBush.prototype.load = function load (extents, values) {\n  var items = new Array(values.length);\n  for (var i = 0, l = values.length; i < l; i++) {\n    var extent = extents[i];\n    var value = values[i];\n\n    /** @type {Entry} */\n    var item = {\n      minX: extent[0],\n      minY: extent[1],\n      maxX: extent[2],\n      maxY: extent[3],\n      value: value\n    };\n    items[i] = item;\n    this.items_[getUid(value)] = item;\n  }\n  this.rbush_.load(items);\n};\n\n\n/**\n * Remove a value from the RBush.\n * @param {T} value Value.\n * @return {boolean} Removed.\n */\nRBush.prototype.remove = function remove (value) {\n  var uid = getUid(value);\n\n  // get the object in which the value was wrapped when adding to the\n  // internal rbush. then use that object to do the removal.\n  var item = this.items_[uid];\n  delete this.items_[uid];\n  return this.rbush_.remove(item) !== null;\n};\n\n\n/**\n * Update the extent of a value in the RBush.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {T} value Value.\n */\nRBush.prototype.update = function update (extent, value) {\n  var item = this.items_[getUid(value)];\n  var bbox = [item.minX, item.minY, item.maxX, item.maxY];\n  if (!equals(bbox, extent)) {\n    this.remove(value);\n    this.insert(extent, value);\n  }\n};\n\n\n/**\n * Return all values in the RBush.\n * @return {Array<T>} All.\n */\nRBush.prototype.getAll = function getAll () {\n  var items = this.rbush_.all();\n  return items.map(function(item) {\n    return item.value;\n  });\n};\n\n\n/**\n * Return all values in the given extent.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {Array<T>} All in extent.\n */\nRBush.prototype.getInExtent = function getInExtent (extent) {\n  /** @type {Entry} */\n  var bbox = {\n    minX: extent[0],\n    minY: extent[1],\n    maxX: extent[2],\n    maxY: extent[3]\n  };\n  var items = this.rbush_.search(bbox);\n  return items.map(function(item) {\n    return item.value;\n  });\n};\n\n\n/**\n * Calls a callback function with each value in the tree.\n * If the callback returns a truthy value, this value is returned without\n * checking the rest of the tree.\n * @param {function(this: S, T): *} callback Callback.\n * @param {S=} opt_this The object to use as `this` in `callback`.\n * @return {*} Callback return value.\n * @template S\n */\nRBush.prototype.forEach = function forEach (callback, opt_this) {\n  return this.forEach_(this.getAll(), callback, opt_this);\n};\n\n\n/**\n * Calls a callback function with each value in the provided extent.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {function(this: S, T): *} callback Callback.\n * @param {S=} opt_this The object to use as `this` in `callback`.\n * @return {*} Callback return value.\n * @template S\n */\nRBush.prototype.forEachInExtent = function forEachInExtent (extent, callback, opt_this) {\n  return this.forEach_(this.getInExtent(extent), callback, opt_this);\n};\n\n\n/**\n * @param {Array<T>} values Values.\n * @param {function(this: S, T): *} callback Callback.\n * @param {S=} opt_this The object to use as `this` in `callback`.\n * @private\n * @return {*} Callback return value.\n * @template S\n */\nRBush.prototype.forEach_ = function forEach_ (values, callback, opt_this) {\n  var result;\n  for (var i = 0, l = values.length; i < l; i++) {\n    result = callback.call(opt_this, values[i]);\n    if (result) {\n      return result;\n    }\n  }\n  return result;\n};\n\n\n/**\n * @return {boolean} Is empty.\n */\nRBush.prototype.isEmpty = function isEmpty$1 () {\n  return isEmpty(this.items_);\n};\n\n\n/**\n * Remove all values from the RBush.\n */\nRBush.prototype.clear = function clear () {\n  this.rbush_.clear();\n  this.items_ = {};\n};\n\n\n/**\n * @param {import(\"../extent.js\").Extent=} opt_extent Extent.\n * @return {import(\"../extent.js\").Extent} Extent.\n */\nRBush.prototype.getExtent = function getExtent (opt_extent) {\n  var data = this.rbush_.toJSON();\n  return createOrUpdate(data.minX, data.minY, data.maxX, data.maxY, opt_extent);\n};\n\n\n/**\n * @param {RBush} rbush R-Tree.\n */\nRBush.prototype.concat = function concat (rbush) {\n  this.rbush_.load(rbush.rbush_.all());\n  for (var i in rbush.items_) {\n    this.items_[i] = rbush.items_[i];\n  }\n};\n\n\nexport default RBush;\n\n//# sourceMappingURL=RBush.js.map","/**\n * @module ol/render/webgl/PolygonReplay\n */\nimport {getUid} from '../../util.js';\nimport {equals} from '../../array.js';\nimport {asArray} from '../../color.js';\nimport {intersects} from '../../extent.js';\nimport {isEmpty} from '../../obj.js';\nimport {linearRingContainsXY} from '../../geom/flat/contains.js';\nimport {linearRingIsClockwise} from '../../geom/flat/orient.js';\nimport {translate} from '../../geom/flat/transform.js';\nimport {fragment, vertex} from './polygonreplay/defaultshader.js';\nimport Locations from './polygonreplay/defaultshader/Locations.js';\nimport WebGLLineStringReplay from './LineStringReplay.js';\nimport WebGLReplay from './Replay.js';\nimport {triangleIsCounterClockwise, EPSILON, DEFAULT_FILLSTYLE} from '../webgl.js';\nimport Stroke from '../../style/Stroke.js';\nimport LinkedList from '../../structs/LinkedList.js';\nimport RBush from '../../structs/RBush.js';\nimport {FLOAT} from '../../webgl.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\n\n\n/**\n * @typedef {Object} PolygonVertex\n * @property {number} x\n * @property {number} y\n * @property {number} i\n * @property {boolean} [reflex]\n */\n\n/**\n * @typedef {Object} PolygonSegment\n * @property {PolygonVertex} p0\n * @property {PolygonVertex} p1\n */\n\n\nvar WebGLPolygonReplay = /*@__PURE__*/(function (WebGLReplay) {\n  function WebGLPolygonReplay(tolerance, maxExtent) {\n    WebGLReplay.call(this, tolerance, maxExtent);\n\n    this.lineStringReplay = new WebGLLineStringReplay(\n      tolerance, maxExtent);\n\n    /**\n     * @private\n     * @type {import(\"./polygonreplay/defaultshader/Locations.js\").default}\n     */\n    this.defaultLocations_ = null;\n\n    /**\n     * @private\n     * @type {Array<Array<number>>}\n     */\n    this.styles_ = [];\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.styleIndices_ = [];\n\n    /**\n     * @private\n     * @type {{fillColor: (Array<number>|null),\n     *         changed: boolean}|null}\n     */\n    this.state_ = {\n      fillColor: null,\n      changed: false\n    };\n\n  }\n\n  if ( WebGLReplay ) WebGLPolygonReplay.__proto__ = WebGLReplay;\n  WebGLPolygonReplay.prototype = Object.create( WebGLReplay && WebGLReplay.prototype );\n  WebGLPolygonReplay.prototype.constructor = WebGLPolygonReplay;\n\n  /**\n   * Draw one polygon.\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {Array<Array<number>>} holeFlatCoordinates Hole flat coordinates.\n   * @param {number} stride Stride.\n   * @private\n   */\n  WebGLPolygonReplay.prototype.drawCoordinates_ = function drawCoordinates_ (flatCoordinates, holeFlatCoordinates, stride) {\n    // Triangulate the polygon\n    var outerRing = new LinkedList();\n    var rtree = new RBush();\n    // Initialize the outer ring\n    this.processFlatCoordinates_(flatCoordinates, stride, outerRing, rtree, true);\n    var maxCoords = this.getMaxCoords_(outerRing);\n\n    // Eliminate holes, if there are any\n    if (holeFlatCoordinates.length) {\n      var i, ii;\n      var holeLists = [];\n      for (i = 0, ii = holeFlatCoordinates.length; i < ii; ++i) {\n        var holeList = {\n          list: new LinkedList(),\n          maxCoords: undefined,\n          rtree: new RBush()\n        };\n        holeLists.push(holeList);\n        this.processFlatCoordinates_(holeFlatCoordinates[i],\n          stride, holeList.list, holeList.rtree, false);\n        this.classifyPoints_(holeList.list, holeList.rtree, true);\n        holeList.maxCoords = this.getMaxCoords_(holeList.list);\n      }\n      holeLists.sort(function(a, b) {\n        return b.maxCoords[0] === a.maxCoords[0] ?\n          a.maxCoords[1] - b.maxCoords[1] : b.maxCoords[0] - a.maxCoords[0];\n      });\n      for (i = 0; i < holeLists.length; ++i) {\n        var currList = holeLists[i].list;\n        var start = currList.firstItem();\n        var currItem = start;\n        var intersection = (void 0);\n        do {\n          //TODO: Triangulate holes when they intersect the outer ring.\n          if (this.getIntersections_(currItem, rtree).length) {\n            intersection = true;\n            break;\n          }\n          currItem = currList.nextItem();\n        } while (start !== currItem);\n        if (!intersection) {\n          if (this.bridgeHole_(currList, holeLists[i].maxCoords[0], outerRing, maxCoords[0], rtree)) {\n            rtree.concat(holeLists[i].rtree);\n            this.classifyPoints_(outerRing, rtree, false);\n          }\n        }\n      }\n    } else {\n      this.classifyPoints_(outerRing, rtree, false);\n    }\n    this.triangulate_(outerRing, rtree);\n  };\n\n  /**\n   * Inserts flat coordinates in a linked list and adds them to the vertex buffer.\n   * @private\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} stride Stride.\n   * @param {import(\"../../structs/LinkedList.js\").default} list Linked list.\n   * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n   * @param {boolean} clockwise Coordinate order should be clockwise.\n   */\n  WebGLPolygonReplay.prototype.processFlatCoordinates_ = function processFlatCoordinates_ (flatCoordinates, stride, list, rtree, clockwise) {\n    var isClockwise = linearRingIsClockwise(flatCoordinates,\n      0, flatCoordinates.length, stride);\n    var i, ii;\n    var n = this.vertices.length / 2;\n    /** @type {PolygonVertex} */\n    var start;\n    /** @type {PolygonVertex} */\n    var p0;\n    /** @type {PolygonVertex} */\n    var p1;\n    var extents = [];\n    var segments = [];\n    if (clockwise === isClockwise) {\n      start = this.createPoint_(flatCoordinates[0], flatCoordinates[1], n++);\n      p0 = start;\n      for (i = stride, ii = flatCoordinates.length; i < ii; i += stride) {\n        p1 = this.createPoint_(flatCoordinates[i], flatCoordinates[i + 1], n++);\n        segments.push(this.insertItem_(p0, p1, list));\n        extents.push([Math.min(p0.x, p1.x), Math.min(p0.y, p1.y), Math.max(p0.x, p1.x),\n          Math.max(p0.y, p1.y)]);\n        p0 = p1;\n      }\n      segments.push(this.insertItem_(p1, start, list));\n      extents.push([Math.min(p0.x, p1.x), Math.min(p0.y, p1.y), Math.max(p0.x, p1.x),\n        Math.max(p0.y, p1.y)]);\n    } else {\n      var end = flatCoordinates.length - stride;\n      start = this.createPoint_(flatCoordinates[end], flatCoordinates[end + 1], n++);\n      p0 = start;\n      for (i = end - stride, ii = 0; i >= ii; i -= stride) {\n        p1 = this.createPoint_(flatCoordinates[i], flatCoordinates[i + 1], n++);\n        segments.push(this.insertItem_(p0, p1, list));\n        extents.push([Math.min(p0.x, p1.x), Math.min(p0.y, p1.y), Math.max(p0.x, p1.x),\n          Math.max(p0.y, p1.y)]);\n        p0 = p1;\n      }\n      segments.push(this.insertItem_(p1, start, list));\n      extents.push([Math.min(p0.x, p1.x), Math.min(p0.y, p1.y), Math.max(p0.x, p1.x),\n        Math.max(p0.y, p1.y)]);\n    }\n    rtree.load(extents, segments);\n  };\n\n  /**\n   * Returns the rightmost coordinates of a polygon on the X axis.\n   * @private\n   * @param {import(\"../../structs/LinkedList.js\").default} list Polygons ring.\n   * @return {Array<number>} Max X coordinates.\n   */\n  WebGLPolygonReplay.prototype.getMaxCoords_ = function getMaxCoords_ (list) {\n    var start = list.firstItem();\n    var seg = start;\n    var maxCoords = [seg.p0.x, seg.p0.y];\n\n    do {\n      seg = list.nextItem();\n      if (seg.p0.x > maxCoords[0]) {\n        maxCoords = [seg.p0.x, seg.p0.y];\n      }\n    } while (seg !== start);\n\n    return maxCoords;\n  };\n\n  /**\n   * Classifies the points of a polygon list as convex, reflex. Removes collinear vertices.\n   * @private\n   * @param {import(\"../../structs/LinkedList.js\").default} list Polygon ring.\n   * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n   * @param {boolean} ccw The orientation of the polygon is counter-clockwise.\n   * @return {boolean} There were reclassified points.\n   */\n  WebGLPolygonReplay.prototype.classifyPoints_ = function classifyPoints_ (list, rtree, ccw) {\n    var start = list.firstItem();\n    var s0 = start;\n    var s1 = list.nextItem();\n    var pointsReclassified = false;\n    do {\n      var reflex = ccw ? triangleIsCounterClockwise(s1.p1.x,\n        s1.p1.y, s0.p1.x, s0.p1.y, s0.p0.x, s0.p0.y) :\n        triangleIsCounterClockwise(s0.p0.x, s0.p0.y, s0.p1.x,\n          s0.p1.y, s1.p1.x, s1.p1.y);\n      if (reflex === undefined) {\n        this.removeItem_(s0, s1, list, rtree);\n        pointsReclassified = true;\n        if (s1 === start) {\n          start = list.getNextItem();\n        }\n        s1 = s0;\n        list.prevItem();\n      } else if (s0.p1.reflex !== reflex) {\n        s0.p1.reflex = reflex;\n        pointsReclassified = true;\n      }\n      s0 = s1;\n      s1 = list.nextItem();\n    } while (s0 !== start);\n    return pointsReclassified;\n  };\n\n  /**\n   * @private\n   * @param {import(\"../../structs/LinkedList.js\").default} hole Linked list of the hole.\n   * @param {number} holeMaxX Maximum X value of the hole.\n   * @param {import(\"../../structs/LinkedList.js\").default} list Linked list of the polygon.\n   * @param {number} listMaxX Maximum X value of the polygon.\n   * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n   * @return {boolean} Bridging was successful.\n   */\n  WebGLPolygonReplay.prototype.bridgeHole_ = function bridgeHole_ (hole, holeMaxX, list, listMaxX, rtree) {\n    var seg = hole.firstItem();\n    while (seg.p1.x !== holeMaxX) {\n      seg = hole.nextItem();\n    }\n\n    var p1 = seg.p1;\n    /** @type {PolygonVertex} */\n    var p2 = {x: listMaxX, y: p1.y, i: -1};\n    var minDist = Infinity;\n    var i, ii, bestPoint;\n    /** @type {PolygonVertex} */\n    var p5;\n\n    var intersectingSegments = this.getIntersections_({p0: p1, p1: p2}, rtree, true);\n    for (i = 0, ii = intersectingSegments.length; i < ii; ++i) {\n      var currSeg = intersectingSegments[i];\n      var intersection = this.calculateIntersection_(p1, p2, currSeg.p0,\n        currSeg.p1, true);\n      var dist = Math.abs(p1.x - intersection[0]);\n      if (dist < minDist && triangleIsCounterClockwise(p1.x, p1.y,\n        currSeg.p0.x, currSeg.p0.y, currSeg.p1.x, currSeg.p1.y) !== undefined) {\n        minDist = dist;\n        p5 = {x: intersection[0], y: intersection[1], i: -1};\n        seg = currSeg;\n      }\n    }\n    if (minDist === Infinity) {\n      return false;\n    }\n    bestPoint = seg.p1;\n\n    if (minDist > 0) {\n      var pointsInTriangle = this.getPointsInTriangle_(p1, p5, seg.p1, rtree);\n      if (pointsInTriangle.length) {\n        var theta = Infinity;\n        for (i = 0, ii = pointsInTriangle.length; i < ii; ++i) {\n          var currPoint = pointsInTriangle[i];\n          var currTheta = Math.atan2(p1.y - currPoint.y, p2.x - currPoint.x);\n          if (currTheta < theta || (currTheta === theta && currPoint.x < bestPoint.x)) {\n            theta = currTheta;\n            bestPoint = currPoint;\n          }\n        }\n      }\n    }\n\n    seg = list.firstItem();\n    while (seg.p1.x !== bestPoint.x || seg.p1.y !== bestPoint.y) {\n      seg = list.nextItem();\n    }\n\n    //We clone the bridge points as they can have different convexity.\n    var p0Bridge = {x: p1.x, y: p1.y, i: p1.i, reflex: undefined};\n    var p1Bridge = {x: seg.p1.x, y: seg.p1.y, i: seg.p1.i, reflex: undefined};\n\n    hole.getNextItem().p0 = p0Bridge;\n    this.insertItem_(p1, seg.p1, hole, rtree);\n    this.insertItem_(p1Bridge, p0Bridge, hole, rtree);\n    seg.p1 = p1Bridge;\n    hole.setFirstItem();\n    list.concat(hole);\n\n    return true;\n  };\n\n  /**\n   * @private\n   * @param {import(\"../../structs/LinkedList.js\").default} list Linked list of the polygon.\n   * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n   */\n  WebGLPolygonReplay.prototype.triangulate_ = function triangulate_ (list, rtree) {\n    var ccw = false;\n    var simple = this.isSimple_(list, rtree);\n\n    // Start clipping ears\n    while (list.getLength() > 3) {\n      if (simple) {\n        if (!this.clipEars_(list, rtree, simple, ccw)) {\n          if (!this.classifyPoints_(list, rtree, ccw)) {\n            // Due to the behavior of OL's PIP algorithm, the ear clipping cannot\n            // introduce touching segments. However, the original data may have some.\n            if (!this.resolveSelfIntersections_(list, rtree, true)) {\n              break;\n            }\n          }\n        }\n      } else {\n        if (!this.clipEars_(list, rtree, simple, ccw)) {\n          // We ran out of ears, try to reclassify.\n          if (!this.classifyPoints_(list, rtree, ccw)) {\n            // We have a bad polygon, try to resolve local self-intersections.\n            if (!this.resolveSelfIntersections_(list, rtree)) {\n              simple = this.isSimple_(list, rtree);\n              if (!simple) {\n                // We have a really bad polygon, try more time consuming methods.\n                this.splitPolygon_(list, rtree);\n                break;\n              } else {\n                ccw = !this.isClockwise_(list);\n                this.classifyPoints_(list, rtree, ccw);\n              }\n            }\n          }\n        }\n      }\n    }\n    if (list.getLength() === 3) {\n      var numIndices = this.indices.length;\n      this.indices[numIndices++] = list.getPrevItem().p0.i;\n      this.indices[numIndices++] = list.getCurrItem().p0.i;\n      this.indices[numIndices++] = list.getNextItem().p0.i;\n    }\n  };\n\n  /**\n   * @private\n   * @param {import(\"../../structs/LinkedList.js\").default} list Linked list of the polygon.\n   * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n   * @param {boolean} simple The polygon is simple.\n   * @param {boolean} ccw Orientation of the polygon is counter-clockwise.\n   * @return {boolean} There were processed ears.\n   */\n  WebGLPolygonReplay.prototype.clipEars_ = function clipEars_ (list, rtree, simple, ccw) {\n    var numIndices = this.indices.length;\n    var start = list.firstItem();\n    var s0 = list.getPrevItem();\n    var s1 = start;\n    var s2 = list.nextItem();\n    var s3 = list.getNextItem();\n    var p0, p1, p2;\n    var processedEars = false;\n    do {\n      p0 = s1.p0;\n      p1 = s1.p1;\n      p2 = s2.p1;\n      if (p1.reflex === false) {\n        // We might have a valid ear\n        var variableCriterion = (void 0);\n        if (simple) {\n          variableCriterion = this.getPointsInTriangle_(p0, p1, p2, rtree, true).length === 0;\n        } else {\n          variableCriterion = ccw ? this.diagonalIsInside_(s3.p1, p2, p1, p0,\n            s0.p0) : this.diagonalIsInside_(s0.p0, p0, p1, p2, s3.p1);\n        }\n        if ((simple || this.getIntersections_({p0: p0, p1: p2}, rtree).length === 0) &&\n            variableCriterion) {\n          //The diagonal is completely inside the polygon\n          if (simple || p0.reflex === false || p2.reflex === false ||\n              linearRingIsClockwise([s0.p0.x, s0.p0.y, p0.x,\n                p0.y, p1.x, p1.y, p2.x, p2.y, s3.p1.x, s3.p1.y], 0, 10, 2) === !ccw) {\n            //The diagonal is persumably valid, we have an ear\n            this.indices[numIndices++] = p0.i;\n            this.indices[numIndices++] = p1.i;\n            this.indices[numIndices++] = p2.i;\n            this.removeItem_(s1, s2, list, rtree);\n            if (s2 === start) {\n              start = s3;\n            }\n            processedEars = true;\n          }\n        }\n      }\n      // Else we have a reflex point.\n      s0 = list.getPrevItem();\n      s1 = list.getCurrItem();\n      s2 = list.nextItem();\n      s3 = list.getNextItem();\n    } while (s1 !== start && list.getLength() > 3);\n\n    return processedEars;\n  };\n\n  /**\n   * @private\n   * @param {import(\"../../structs/LinkedList.js\").default} list Linked list of the polygon.\n   * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n   * @param {boolean=} opt_touch Resolve touching segments.\n   * @return {boolean} There were resolved intersections.\n  */\n  WebGLPolygonReplay.prototype.resolveSelfIntersections_ = function resolveSelfIntersections_ (list, rtree, opt_touch) {\n    var start = list.firstItem();\n    list.nextItem();\n    var s0 = start;\n    var s1 = list.nextItem();\n    var resolvedIntersections = false;\n\n    do {\n      var intersection = this.calculateIntersection_(s0.p0, s0.p1, s1.p0, s1.p1,\n        opt_touch);\n      if (intersection) {\n        var breakCond = false;\n        var numVertices = this.vertices.length;\n        var numIndices = this.indices.length;\n        var n = numVertices / 2;\n        var seg = list.prevItem();\n        list.removeItem();\n        rtree.remove(seg);\n        breakCond = (seg === start);\n        var p = (void 0);\n        if (opt_touch) {\n          if (intersection[0] === s0.p0.x && intersection[1] === s0.p0.y) {\n            list.prevItem();\n            p = s0.p0;\n            s1.p0 = p;\n            rtree.remove(s0);\n            breakCond = breakCond || (s0 === start);\n          } else {\n            p = s1.p1;\n            s0.p1 = p;\n            rtree.remove(s1);\n            breakCond = breakCond || (s1 === start);\n          }\n          list.removeItem();\n        } else {\n          p = this.createPoint_(intersection[0], intersection[1], n);\n          s0.p1 = p;\n          s1.p0 = p;\n          rtree.update([Math.min(s0.p0.x, s0.p1.x), Math.min(s0.p0.y, s0.p1.y),\n            Math.max(s0.p0.x, s0.p1.x), Math.max(s0.p0.y, s0.p1.y)], s0);\n          rtree.update([Math.min(s1.p0.x, s1.p1.x), Math.min(s1.p0.y, s1.p1.y),\n            Math.max(s1.p0.x, s1.p1.x), Math.max(s1.p0.y, s1.p1.y)], s1);\n        }\n\n        this.indices[numIndices++] = seg.p0.i;\n        this.indices[numIndices++] = seg.p1.i;\n        this.indices[numIndices++] = p.i;\n\n        resolvedIntersections = true;\n        if (breakCond) {\n          break;\n        }\n      }\n\n      s0 = list.getPrevItem();\n      s1 = list.nextItem();\n    } while (s0 !== start);\n    return resolvedIntersections;\n  };\n\n  /**\n   * @private\n   * @param {import(\"../../structs/LinkedList.js\").default} list Linked list of the polygon.\n   * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n   * @return {boolean} The polygon is simple.\n   */\n  WebGLPolygonReplay.prototype.isSimple_ = function isSimple_ (list, rtree) {\n    var start = list.firstItem();\n    var seg = start;\n    do {\n      if (this.getIntersections_(seg, rtree).length) {\n        return false;\n      }\n      seg = list.nextItem();\n    } while (seg !== start);\n    return true;\n  };\n\n  /**\n   * @private\n   * @param {import(\"../../structs/LinkedList.js\").default} list Linked list of the polygon.\n   * @return {boolean} Orientation is clockwise.\n   */\n  WebGLPolygonReplay.prototype.isClockwise_ = function isClockwise_ (list) {\n    var length = list.getLength() * 2;\n    var flatCoordinates = new Array(length);\n    var start = list.firstItem();\n    var seg = start;\n    var i = 0;\n    do {\n      flatCoordinates[i++] = seg.p0.x;\n      flatCoordinates[i++] = seg.p0.y;\n      seg = list.nextItem();\n    } while (seg !== start);\n    return linearRingIsClockwise(flatCoordinates, 0, length, 2);\n  };\n\n  /**\n   * @private\n   * @param {import(\"../../structs/LinkedList.js\").default} list Linked list of the polygon.\n   * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n   */\n  WebGLPolygonReplay.prototype.splitPolygon_ = function splitPolygon_ (list, rtree) {\n    var start = list.firstItem();\n    var s0 = start;\n    do {\n      var intersections = this.getIntersections_(s0, rtree);\n      if (intersections.length) {\n        var s1 = intersections[0];\n        var n = this.vertices.length / 2;\n        var intersection = this.calculateIntersection_(s0.p0,\n          s0.p1, s1.p0, s1.p1);\n        var p = this.createPoint_(intersection[0], intersection[1], n);\n        var newPolygon = new LinkedList();\n        var newRtree = new RBush();\n        this.insertItem_(p, s0.p1, newPolygon, newRtree);\n        s0.p1 = p;\n        rtree.update([Math.min(s0.p0.x, p.x), Math.min(s0.p0.y, p.y),\n          Math.max(s0.p0.x, p.x), Math.max(s0.p0.y, p.y)], s0);\n        var currItem = list.nextItem();\n        while (currItem !== s1) {\n          this.insertItem_(currItem.p0, currItem.p1, newPolygon, newRtree);\n          rtree.remove(currItem);\n          list.removeItem();\n          currItem = list.getCurrItem();\n        }\n        this.insertItem_(s1.p0, p, newPolygon, newRtree);\n        s1.p0 = p;\n        rtree.update([Math.min(s1.p1.x, p.x), Math.min(s1.p1.y, p.y),\n          Math.max(s1.p1.x, p.x), Math.max(s1.p1.y, p.y)], s1);\n        this.classifyPoints_(list, rtree, false);\n        this.triangulate_(list, rtree);\n        this.classifyPoints_(newPolygon, newRtree, false);\n        this.triangulate_(newPolygon, newRtree);\n        break;\n      }\n      s0 = list.nextItem();\n    } while (s0 !== start);\n  };\n\n  /**\n   * @private\n   * @param {number} x X coordinate.\n   * @param {number} y Y coordinate.\n   * @param {number} i Index.\n   * @return {PolygonVertex} List item.\n   */\n  WebGLPolygonReplay.prototype.createPoint_ = function createPoint_ (x, y, i) {\n    var numVertices = this.vertices.length;\n    this.vertices[numVertices++] = x;\n    this.vertices[numVertices++] = y;\n    /** @type {PolygonVertex} */\n    var p = {\n      x: x,\n      y: y,\n      i: i,\n      reflex: undefined\n    };\n    return p;\n  };\n\n  /**\n   * @private\n   * @param {PolygonVertex} p0 First point of segment.\n   * @param {PolygonVertex} p1 Second point of segment.\n   * @param {import(\"../../structs/LinkedList.js\").default} list Polygon ring.\n   * @param {import(\"../../structs/RBush.js\").default=} opt_rtree Insert the segment into the R-Tree.\n   * @return {PolygonSegment} segment.\n   */\n  WebGLPolygonReplay.prototype.insertItem_ = function insertItem_ (p0, p1, list, opt_rtree) {\n    var seg = {\n      p0: p0,\n      p1: p1\n    };\n    list.insertItem(seg);\n    if (opt_rtree) {\n      opt_rtree.insert([Math.min(p0.x, p1.x), Math.min(p0.y, p1.y),\n        Math.max(p0.x, p1.x), Math.max(p0.y, p1.y)], seg);\n    }\n    return seg;\n  };\n\n  /**\n    * @private\n    * @param {PolygonSegment} s0 Segment before the remove candidate.\n    * @param {PolygonSegment} s1 Remove candidate segment.\n    * @param {import(\"../../structs/LinkedList.js\").default} list Polygon ring.\n    * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n    */\n  WebGLPolygonReplay.prototype.removeItem_ = function removeItem_ (s0, s1, list, rtree) {\n    if (list.getCurrItem() === s1) {\n      list.removeItem();\n      s0.p1 = s1.p1;\n      rtree.remove(s1);\n      rtree.update([Math.min(s0.p0.x, s0.p1.x), Math.min(s0.p0.y, s0.p1.y),\n        Math.max(s0.p0.x, s0.p1.x), Math.max(s0.p0.y, s0.p1.y)], s0);\n    }\n  };\n\n  /**\n   * @private\n   * @param {PolygonVertex} p0 First point.\n   * @param {PolygonVertex} p1 Second point.\n   * @param {PolygonVertex} p2 Third point.\n   * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n   * @param {boolean=} opt_reflex Only include reflex points.\n   * @return {Array<PolygonVertex>} Points in the triangle.\n   */\n  WebGLPolygonReplay.prototype.getPointsInTriangle_ = function getPointsInTriangle_ (p0, p1, p2, rtree, opt_reflex) {\n    var result = [];\n    var segmentsInExtent = rtree.getInExtent([Math.min(p0.x, p1.x, p2.x),\n      Math.min(p0.y, p1.y, p2.y), Math.max(p0.x, p1.x, p2.x), Math.max(p0.y,\n        p1.y, p2.y)]);\n    for (var i = 0, ii = segmentsInExtent.length; i < ii; ++i) {\n      for (var j in segmentsInExtent[i]) {\n        var p = segmentsInExtent[i][j];\n        if (typeof p === 'object' && (!opt_reflex || p.reflex)) {\n          if ((p.x !== p0.x || p.y !== p0.y) && (p.x !== p1.x || p.y !== p1.y) &&\n              (p.x !== p2.x || p.y !== p2.y) && result.indexOf(p) === -1 &&\n              linearRingContainsXY([p0.x, p0.y, p1.x, p1.y, p2.x, p2.y], 0, 6, 2, p.x, p.y)) {\n            result.push(p);\n          }\n        }\n      }\n    }\n    return result;\n  };\n\n  /**\n   * @private\n   * @param {PolygonSegment} segment Segment.\n   * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n   * @param {boolean=} opt_touch Touching segments should be considered an intersection.\n   * @return {Array<PolygonSegment>} Intersecting segments.\n   */\n  WebGLPolygonReplay.prototype.getIntersections_ = function getIntersections_ (segment, rtree, opt_touch) {\n    var p0 = segment.p0;\n    var p1 = segment.p1;\n    var segmentsInExtent = rtree.getInExtent([Math.min(p0.x, p1.x),\n      Math.min(p0.y, p1.y), Math.max(p0.x, p1.x), Math.max(p0.y, p1.y)]);\n    var result = [];\n    for (var i = 0, ii = segmentsInExtent.length; i < ii; ++i) {\n      var currSeg = segmentsInExtent[i];\n      if (segment !== currSeg && (opt_touch || currSeg.p0 !== p1 || currSeg.p1 !== p0) &&\n          this.calculateIntersection_(p0, p1, currSeg.p0, currSeg.p1, opt_touch)) {\n        result.push(currSeg);\n      }\n    }\n    return result;\n  };\n\n  /**\n   * Line intersection algorithm by Paul Bourke.\n   * See http://paulbourke.net/geometry/pointlineplane/.\n   *\n   * @private\n   * @param {PolygonVertex} p0 First point.\n   * @param {PolygonVertex} p1 Second point.\n   * @param {PolygonVertex} p2 Third point.\n   * @param {PolygonVertex} p3 Fourth point.\n   * @param {boolean=} opt_touch Touching segments should be considered an intersection.\n   * @return {Array<number>|undefined} Intersection coordinates.\n   */\n  WebGLPolygonReplay.prototype.calculateIntersection_ = function calculateIntersection_ (p0, p1, p2, p3, opt_touch) {\n    var denom = (p3.y - p2.y) * (p1.x - p0.x) - (p3.x - p2.x) * (p1.y - p0.y);\n    if (denom !== 0) {\n      var ua = ((p3.x - p2.x) * (p0.y - p2.y) - (p3.y - p2.y) * (p0.x - p2.x)) / denom;\n      var ub = ((p1.x - p0.x) * (p0.y - p2.y) - (p1.y - p0.y) * (p0.x - p2.x)) / denom;\n      if ((!opt_touch && ua > EPSILON && ua < 1 - EPSILON &&\n          ub > EPSILON && ub < 1 - EPSILON) || (opt_touch &&\n          ua >= 0 && ua <= 1 && ub >= 0 && ub <= 1)) {\n        return [p0.x + ua * (p1.x - p0.x), p0.y + ua * (p1.y - p0.y)];\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * @private\n   * @param {PolygonVertex} p0 Point before the start of the diagonal.\n   * @param {PolygonVertex} p1 Start point of the diagonal.\n   * @param {PolygonVertex} p2 Ear candidate.\n   * @param {PolygonVertex} p3 End point of the diagonal.\n   * @param {PolygonVertex} p4 Point after the end of the diagonal.\n   * @return {boolean} Diagonal is inside the polygon.\n   */\n  WebGLPolygonReplay.prototype.diagonalIsInside_ = function diagonalIsInside_ (p0, p1, p2, p3, p4) {\n    if (p1.reflex === undefined || p3.reflex === undefined) {\n      return false;\n    }\n    var p1IsLeftOf = (p2.x - p3.x) * (p1.y - p3.y) > (p2.y - p3.y) * (p1.x - p3.x);\n    var p1IsRightOf = (p4.x - p3.x) * (p1.y - p3.y) < (p4.y - p3.y) * (p1.x - p3.x);\n    var p3IsLeftOf = (p0.x - p1.x) * (p3.y - p1.y) > (p0.y - p1.y) * (p3.x - p1.x);\n    var p3IsRightOf = (p2.x - p1.x) * (p3.y - p1.y) < (p2.y - p1.y) * (p3.x - p1.x);\n    var p1InCone = p3.reflex ? p1IsRightOf || p1IsLeftOf : p1IsRightOf && p1IsLeftOf;\n    var p3InCone = p1.reflex ? p3IsRightOf || p3IsLeftOf : p3IsRightOf && p3IsLeftOf;\n    return p1InCone && p3InCone;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLPolygonReplay.prototype.drawMultiPolygon = function drawMultiPolygon (multiPolygonGeometry, feature) {\n    var endss = multiPolygonGeometry.getEndss();\n    var stride = multiPolygonGeometry.getStride();\n    var currIndex = this.indices.length;\n    var currLineIndex = this.lineStringReplay.getCurrentIndex();\n    var flatCoordinates = multiPolygonGeometry.getFlatCoordinates();\n    var i, ii, j, jj;\n    var start = 0;\n    for (i = 0, ii = endss.length; i < ii; ++i) {\n      var ends = endss[i];\n      if (ends.length > 0) {\n        var outerRing = translate(flatCoordinates, start, ends[0],\n          stride, -this.origin[0], -this.origin[1]);\n        if (outerRing.length) {\n          var holes = [];\n          var holeFlatCoords = (void 0);\n          for (j = 1, jj = ends.length; j < jj; ++j) {\n            if (ends[j] !== ends[j - 1]) {\n              holeFlatCoords = translate(flatCoordinates, ends[j - 1],\n                ends[j], stride, -this.origin[0], -this.origin[1]);\n              holes.push(holeFlatCoords);\n            }\n          }\n          this.lineStringReplay.drawPolygonCoordinates(outerRing, holes, stride);\n          this.drawCoordinates_(outerRing, holes, stride);\n        }\n      }\n      start = ends[ends.length - 1];\n    }\n    if (this.indices.length > currIndex) {\n      this.startIndices.push(currIndex);\n      this.startIndicesFeature.push(feature);\n      if (this.state_.changed) {\n        this.styleIndices_.push(currIndex);\n        this.state_.changed = false;\n      }\n    }\n    if (this.lineStringReplay.getCurrentIndex() > currLineIndex) {\n      this.lineStringReplay.setPolygonStyle(feature, currLineIndex);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLPolygonReplay.prototype.drawPolygon = function drawPolygon (polygonGeometry, feature) {\n    var ends = polygonGeometry.getEnds();\n    var stride = polygonGeometry.getStride();\n    if (ends.length > 0) {\n      var flatCoordinates = polygonGeometry.getFlatCoordinates().map(Number);\n      var outerRing = translate(flatCoordinates, 0, ends[0],\n        stride, -this.origin[0], -this.origin[1]);\n      if (outerRing.length) {\n        var holes = [];\n        var i, ii, holeFlatCoords;\n        for (i = 1, ii = ends.length; i < ii; ++i) {\n          if (ends[i] !== ends[i - 1]) {\n            holeFlatCoords = translate(flatCoordinates, ends[i - 1],\n              ends[i], stride, -this.origin[0], -this.origin[1]);\n            holes.push(holeFlatCoords);\n          }\n        }\n\n        this.startIndices.push(this.indices.length);\n        this.startIndicesFeature.push(feature);\n        if (this.state_.changed) {\n          this.styleIndices_.push(this.indices.length);\n          this.state_.changed = false;\n        }\n        this.lineStringReplay.setPolygonStyle(feature);\n\n        this.lineStringReplay.drawPolygonCoordinates(outerRing, holes, stride);\n        this.drawCoordinates_(outerRing, holes, stride);\n      }\n    }\n  };\n\n  /**\n   * @inheritDoc\n   **/\n  WebGLPolygonReplay.prototype.finish = function finish (context) {\n    // create, bind, and populate the vertices buffer\n    this.verticesBuffer = new WebGLBuffer(this.vertices);\n\n    // create, bind, and populate the indices buffer\n    this.indicesBuffer = new WebGLBuffer(this.indices);\n\n    this.startIndices.push(this.indices.length);\n\n    this.lineStringReplay.finish(context);\n\n    //Clean up, if there is nothing to draw\n    if (this.styleIndices_.length === 0 && this.styles_.length > 0) {\n      this.styles_ = [];\n    }\n\n    this.vertices = null;\n    this.indices = null;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLPolygonReplay.prototype.getDeleteResourcesFunction = function getDeleteResourcesFunction (context) {\n    var verticesBuffer = this.verticesBuffer;\n    var indicesBuffer = this.indicesBuffer;\n    var lineDeleter = this.lineStringReplay.getDeleteResourcesFunction(context);\n    return function() {\n      context.deleteBuffer(verticesBuffer);\n      context.deleteBuffer(indicesBuffer);\n      lineDeleter();\n    };\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLPolygonReplay.prototype.setUpProgram = function setUpProgram (gl, context, size, pixelRatio) {\n    // get the program\n    var program = context.getProgram(fragment, vertex);\n\n    // get the locations\n    var locations;\n    if (!this.defaultLocations_) {\n      locations = new Locations(gl, program);\n      this.defaultLocations_ = locations;\n    } else {\n      locations = this.defaultLocations_;\n    }\n\n    context.useProgram(program);\n\n    // enable the vertex attrib arrays\n    gl.enableVertexAttribArray(locations.a_position);\n    gl.vertexAttribPointer(locations.a_position, 2, FLOAT,\n      false, 8, 0);\n\n    return locations;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLPolygonReplay.prototype.shutDownProgram = function shutDownProgram (gl, locations) {\n    gl.disableVertexAttribArray(locations.a_position);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLPolygonReplay.prototype.drawReplay = function drawReplay (gl, context, skippedFeaturesHash, hitDetection) {\n    //Save GL parameters.\n    var tmpDepthFunc = /** @type {number} */ (gl.getParameter(gl.DEPTH_FUNC));\n    var tmpDepthMask = /** @type {boolean} */ (gl.getParameter(gl.DEPTH_WRITEMASK));\n\n    if (!hitDetection) {\n      gl.enable(gl.DEPTH_TEST);\n      gl.depthMask(true);\n      gl.depthFunc(gl.NOTEQUAL);\n    }\n\n    if (!isEmpty(skippedFeaturesHash)) {\n      this.drawReplaySkipping_(gl, context, skippedFeaturesHash);\n    } else {\n      //Draw by style groups to minimize drawElements() calls.\n      var i, start, end, nextStyle;\n      end = this.startIndices[this.startIndices.length - 1];\n      for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n        start = this.styleIndices_[i];\n        nextStyle = this.styles_[i];\n        this.setFillStyle_(gl, nextStyle);\n        this.drawElements(gl, context, start, end);\n        end = start;\n      }\n    }\n    if (!hitDetection) {\n      gl.disable(gl.DEPTH_TEST);\n      gl.clear(gl.DEPTH_BUFFER_BIT);\n      //Restore GL parameters.\n      gl.depthMask(tmpDepthMask);\n      gl.depthFunc(tmpDepthFunc);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLPolygonReplay.prototype.drawHitDetectionReplayOneByOne = function drawHitDetectionReplayOneByOne (gl, context, skippedFeaturesHash, featureCallback, opt_hitExtent) {\n    var i, start, end, nextStyle, groupStart, feature, featureIndex;\n    featureIndex = this.startIndices.length - 2;\n    end = this.startIndices[featureIndex + 1];\n    for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n      nextStyle = this.styles_[i];\n      this.setFillStyle_(gl, nextStyle);\n      groupStart = this.styleIndices_[i];\n\n      while (featureIndex >= 0 &&\n          this.startIndices[featureIndex] >= groupStart) {\n        start = this.startIndices[featureIndex];\n        feature = this.startIndicesFeature[featureIndex];\n\n        if (skippedFeaturesHash[getUid(feature)] === undefined &&\n            feature.getGeometry() &&\n            (opt_hitExtent === undefined || intersects(\n              /** @type {Array<number>} */ (opt_hitExtent),\n              feature.getGeometry().getExtent()))) {\n          gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);\n          this.drawElements(gl, context, start, end);\n\n          var result = featureCallback(feature);\n\n          if (result) {\n            return result;\n          }\n\n        }\n        featureIndex--;\n        end = start;\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * @private\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {Object} skippedFeaturesHash Ids of features to skip.\n   */\n  WebGLPolygonReplay.prototype.drawReplaySkipping_ = function drawReplaySkipping_ (gl, context, skippedFeaturesHash) {\n    var i, start, end, nextStyle, groupStart, feature, featureIndex, featureStart;\n    featureIndex = this.startIndices.length - 2;\n    end = start = this.startIndices[featureIndex + 1];\n    for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n      nextStyle = this.styles_[i];\n      this.setFillStyle_(gl, nextStyle);\n      groupStart = this.styleIndices_[i];\n\n      while (featureIndex >= 0 &&\n          this.startIndices[featureIndex] >= groupStart) {\n        featureStart = this.startIndices[featureIndex];\n        feature = this.startIndicesFeature[featureIndex];\n\n        if (skippedFeaturesHash[getUid(feature)]) {\n          if (start !== end) {\n            this.drawElements(gl, context, start, end);\n            gl.clear(gl.DEPTH_BUFFER_BIT);\n          }\n          end = featureStart;\n        }\n        featureIndex--;\n        start = featureStart;\n      }\n      if (start !== end) {\n        this.drawElements(gl, context, start, end);\n        gl.clear(gl.DEPTH_BUFFER_BIT);\n      }\n      start = end = groupStart;\n    }\n  };\n\n  /**\n   * @private\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {Array<number>} color Color.\n   */\n  WebGLPolygonReplay.prototype.setFillStyle_ = function setFillStyle_ (gl, color) {\n    gl.uniform4fv(this.defaultLocations_.u_color, color);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLPolygonReplay.prototype.setFillStrokeStyle = function setFillStrokeStyle (fillStyle, strokeStyle) {\n    var fillStyleColor = fillStyle ? fillStyle.getColor() : [0, 0, 0, 0];\n    if (!(fillStyleColor instanceof CanvasGradient) &&\n        !(fillStyleColor instanceof CanvasPattern)) {\n      fillStyleColor = asArray(fillStyleColor).map(function(c, i) {\n        return i != 3 ? c / 255 : c;\n      }) || DEFAULT_FILLSTYLE;\n    } else {\n      fillStyleColor = DEFAULT_FILLSTYLE;\n    }\n    if (!this.state_.fillColor || !equals(fillStyleColor, this.state_.fillColor)) {\n      this.state_.fillColor = fillStyleColor;\n      this.state_.changed = true;\n      this.styles_.push(fillStyleColor);\n    }\n    //Provide a null stroke style, if no strokeStyle is provided. Required for the draw interaction to work.\n    if (strokeStyle) {\n      this.lineStringReplay.setFillStrokeStyle(null, strokeStyle);\n    } else {\n      var nullStrokeStyle = new Stroke({\n        color: [0, 0, 0, 0],\n        width: 0\n      });\n      this.lineStringReplay.setFillStrokeStyle(null, nullStrokeStyle);\n    }\n  };\n\n  return WebGLPolygonReplay;\n}(WebGLReplay));\n\n\nexport default WebGLPolygonReplay;\n\n//# sourceMappingURL=PolygonReplay.js.map","/**\n * @module ol/style/Atlas\n */\nimport {createCanvasContext2D} from '../dom.js';\n\n\n/**\n * @typedef {Object} AtlasBlock\n * @property {number} x\n * @property {number} y\n * @property {number} width\n * @property {number} height\n */\n\n/**\n * Provides information for an image inside an atlas.\n * `offsetX` and `offsetY` are the position of the image inside the atlas image `image`.\n * @typedef {Object} AtlasInfo\n * @property {number} offsetX\n * @property {number} offsetY\n * @property {HTMLCanvasElement} image\n */\n\n\n/**\n * @classesc\n * This class facilitates the creation of image atlases.\n *\n * Images added to an atlas will be rendered onto a single\n * atlas canvas. The distribution of images on the canvas is\n * managed with the bin packing algorithm described in:\n * http://www.blackpawn.com/texts/lightmaps/\n *\n * @param {number} size The size in pixels of the sprite image.\n * @param {number} space The space in pixels between images.\n *    Because texture coordinates are float values, the edges of\n *    images might not be completely correct (in a way that the\n *    edges overlap when being rendered). To avoid this we add a\n *    padding around each image.\n */\nvar Atlas = function Atlas(size, space) {\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.space_ = space;\n\n  /**\n   * @private\n   * @type {Array<AtlasBlock>}\n   */\n  this.emptyBlocks_ = [{x: 0, y: 0, width: size, height: size}];\n\n  /**\n   * @private\n   * @type {Object<string, AtlasInfo>}\n   */\n  this.entries_ = {};\n\n  /**\n   * @private\n   * @type {CanvasRenderingContext2D}\n   */\n  this.context_ = createCanvasContext2D(size, size);\n\n  /**\n   * @private\n   * @type {HTMLCanvasElement}\n   */\n  this.canvas_ = this.context_.canvas;\n};\n\n/**\n * @param {string} id The identifier of the entry to check.\n * @return {?AtlasInfo} The atlas info.\n */\nAtlas.prototype.get = function get (id) {\n  return this.entries_[id] || null;\n};\n\n/**\n * @param {string} id The identifier of the entry to add.\n * @param {number} width The width.\n * @param {number} height The height.\n * @param {function(CanvasRenderingContext2D, number, number)} renderCallback\n *  Called to render the new image onto an atlas image.\n * @param {Object=} opt_this Value to use as `this` when executing\n *  `renderCallback`.\n * @return {?AtlasInfo} The position and atlas image for the entry.\n */\nAtlas.prototype.add = function add (id, width, height, renderCallback, opt_this) {\n  for (var i = 0, ii = this.emptyBlocks_.length; i < ii; ++i) {\n    var block = this.emptyBlocks_[i];\n    if (block.width >= width + this.space_ &&\n        block.height >= height + this.space_) {\n      // we found a block that is big enough for our entry\n      var entry = {\n        offsetX: block.x + this.space_,\n        offsetY: block.y + this.space_,\n        image: this.canvas_\n      };\n      this.entries_[id] = entry;\n\n      // render the image on the atlas image\n      renderCallback.call(opt_this, this.context_,\n        block.x + this.space_, block.y + this.space_);\n\n      // split the block after the insertion, either horizontally or vertically\n      this.split_(i, block, width + this.space_, height + this.space_);\n\n      return entry;\n    }\n  }\n\n  // there is no space for the new entry in this atlas\n  return null;\n};\n\n/**\n * @private\n * @param {number} index The index of the block.\n * @param {AtlasBlock} block The block to split.\n * @param {number} width The width of the entry to insert.\n * @param {number} height The height of the entry to insert.\n */\nAtlas.prototype.split_ = function split_ (index, block, width, height) {\n  var deltaWidth = block.width - width;\n  var deltaHeight = block.height - height;\n\n  /** @type {AtlasBlock} */\n  var newBlock1;\n  /** @type {AtlasBlock} */\n  var newBlock2;\n\n  if (deltaWidth > deltaHeight) {\n    // split vertically\n    // block right of the inserted entry\n    newBlock1 = {\n      x: block.x + width,\n      y: block.y,\n      width: block.width - width,\n      height: block.height\n    };\n\n    // block below the inserted entry\n    newBlock2 = {\n      x: block.x,\n      y: block.y + height,\n      width: width,\n      height: block.height - height\n    };\n    this.updateBlocks_(index, newBlock1, newBlock2);\n  } else {\n    // split horizontally\n    // block right of the inserted entry\n    newBlock1 = {\n      x: block.x + width,\n      y: block.y,\n      width: block.width - width,\n      height: height\n    };\n\n    // block below the inserted entry\n    newBlock2 = {\n      x: block.x,\n      y: block.y + height,\n      width: block.width,\n      height: block.height - height\n    };\n    this.updateBlocks_(index, newBlock1, newBlock2);\n  }\n};\n\n/**\n * Remove the old block and insert new blocks at the same array position.\n * The new blocks are inserted at the same position, so that splitted\n * blocks (that are potentially smaller) are filled first.\n * @private\n * @param {number} index The index of the block to remove.\n * @param {AtlasBlock} newBlock1 The 1st block to add.\n * @param {AtlasBlock} newBlock2 The 2nd block to add.\n */\nAtlas.prototype.updateBlocks_ = function updateBlocks_ (index, newBlock1, newBlock2) {\n  var args = /** @type {Array<*>} */ ([index, 1]);\n  if (newBlock1.width > 0 && newBlock1.height > 0) {\n    args.push(newBlock1);\n  }\n  if (newBlock2.width > 0 && newBlock2.height > 0) {\n    args.push(newBlock2);\n  }\n  this.emptyBlocks_.splice.apply(this.emptyBlocks_, args);\n};\n\nexport default Atlas;\n\n//# sourceMappingURL=Atlas.js.map","/**\n * @module ol/style/AtlasManager\n */\nimport {MAX_TEXTURE_SIZE as WEBGL_MAX_TEXTURE_SIZE} from '../webgl.js';\nimport {VOID} from '../functions.js';\nimport Atlas from './Atlas.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [initialSize=256] The size in pixels of the first atlas image.\n * @property {number} [maxSize] The maximum size in pixels of atlas images. Default is\n * `webgl/MAX_TEXTURE_SIZE` or 2048 if WebGL is not supported.\n * @property {number} [space=1] The space in pixels between images.\n */\n\n\n/**\n * Provides information for an image inside an atlas manager.\n * `offsetX` and `offsetY` is the position of the image inside\n * the atlas image `image` and the position of the hit-detection image\n * inside the hit-detection atlas image `hitImage`.\n * @typedef {Object} AtlasManagerInfo\n * @property {number} offsetX\n * @property {number} offsetY\n * @property {HTMLCanvasElement} image\n * @property {HTMLCanvasElement} hitImage\n */\n\n\n/**\n * The size in pixels of the first atlas image.\n * @type {number}\n */\nvar INITIAL_ATLAS_SIZE = 256;\n\n/**\n * The maximum size in pixels of atlas images.\n * @type {number}\n */\nvar MAX_ATLAS_SIZE = -1;\n\n\n/**\n * @classdesc\n * Manages the creation of image atlases.\n *\n * Images added to this manager will be inserted into an atlas, which\n * will be used for rendering.\n * The `size` given in the constructor is the size for the first\n * atlas. After that, when new atlases are created, they will have\n * twice the size as the latest atlas (until `maxSize` is reached).\n *\n * If an application uses many images or very large images, it is recommended\n * to set a higher `size` value to avoid the creation of too many atlases.\n * @api\n */\nvar AtlasManager = function AtlasManager(opt_options) {\n\n  var options = opt_options || {};\n\n  /**\n   * The size in pixels of the latest atlas image.\n   * @private\n   * @type {number}\n   */\n  this.currentSize_ = options.initialSize !== undefined ?\n    options.initialSize : INITIAL_ATLAS_SIZE;\n\n  /**\n   * The maximum size in pixels of atlas images.\n   * @private\n   * @type {number}\n   */\n  this.maxSize_ = options.maxSize !== undefined ?\n    options.maxSize : MAX_ATLAS_SIZE != -1 ?\n      MAX_ATLAS_SIZE : WEBGL_MAX_TEXTURE_SIZE !== undefined ?\n        WEBGL_MAX_TEXTURE_SIZE : 2048;\n\n  /**\n   * The size in pixels between images.\n   * @private\n   * @type {number}\n   */\n  this.space_ = options.space !== undefined ? options.space : 1;\n\n  /**\n   * @private\n   * @type {Array<import(\"./Atlas.js\").default>}\n   */\n  this.atlases_ = [new Atlas(this.currentSize_, this.space_)];\n\n  /**\n   * The size in pixels of the latest atlas image for hit-detection images.\n   * @private\n   * @type {number}\n   */\n  this.currentHitSize_ = this.currentSize_;\n\n  /**\n   * @private\n   * @type {Array<import(\"./Atlas.js\").default>}\n   */\n  this.hitAtlases_ = [new Atlas(this.currentHitSize_, this.space_)];\n};\n\n/**\n * @param {string} id The identifier of the entry to check.\n * @return {?AtlasManagerInfo} The position and atlas image for the\n *  entry, or `null` if the entry is not part of the atlas manager.\n */\nAtlasManager.prototype.getInfo = function getInfo (id) {\n  /** @type {?import(\"./Atlas.js\").AtlasInfo} */\n  var info = this.getInfo_(this.atlases_, id);\n\n  if (!info) {\n    return null;\n  }\n  var hitInfo = /** @type {import(\"./Atlas.js\").AtlasInfo} */ (this.getInfo_(this.hitAtlases_, id));\n\n  return this.mergeInfos_(info, hitInfo);\n};\n\n/**\n * @private\n * @param {Array<import(\"./Atlas.js\").default>} atlases The atlases to search.\n * @param {string} id The identifier of the entry to check.\n * @return {?import(\"./Atlas.js\").AtlasInfo} The position and atlas image for the entry,\n *  or `null` if the entry is not part of the atlases.\n */\nAtlasManager.prototype.getInfo_ = function getInfo_ (atlases, id) {\n  for (var i = 0, ii = atlases.length; i < ii; ++i) {\n    var atlas = atlases[i];\n    var info = atlas.get(id);\n    if (info) {\n      return info;\n    }\n  }\n  return null;\n};\n\n/**\n * @private\n * @param {import(\"./Atlas.js\").AtlasInfo} info The info for the real image.\n * @param {import(\"./Atlas.js\").AtlasInfo} hitInfo The info for the hit-detection\n *  image.\n * @return {?AtlasManagerInfo} The position and atlas image for the\n *  entry, or `null` if the entry is not part of the atlases.\n */\nAtlasManager.prototype.mergeInfos_ = function mergeInfos_ (info, hitInfo) {\n  return (\n    /** @type {AtlasManagerInfo} */ ({\n      offsetX: info.offsetX,\n      offsetY: info.offsetY,\n      image: info.image,\n      hitImage: hitInfo.image\n    })\n  );\n};\n\n/**\n * Add an image to the atlas manager.\n *\n * If an entry for the given id already exists, the entry will\n * be overridden (but the space on the atlas graphic will not be freed).\n *\n * If `renderHitCallback` is provided, the image (or the hit-detection version\n * of the image) will be rendered into a separate hit-detection atlas image.\n *\n * @param {string} id The identifier of the entry to add.\n * @param {number} width The width.\n * @param {number} height The height.\n * @param {function(CanvasRenderingContext2D, number, number)} renderCallback\n *  Called to render the new image onto an atlas image.\n * @param {function(CanvasRenderingContext2D, number, number)=} opt_renderHitCallback Called to render a hit-detection image onto a hit\n *  detection atlas image.\n * @param {Object=} opt_this Value to use as `this` when executing\n *  `renderCallback` and `renderHitCallback`.\n * @return {?AtlasManagerInfo}The position and atlas image for the\n *  entry, or `null` if the image is too big.\n */\nAtlasManager.prototype.add = function add (id, width, height, renderCallback, opt_renderHitCallback, opt_this) {\n  if (width + this.space_ > this.maxSize_ ||\n      height + this.space_ > this.maxSize_) {\n    return null;\n  }\n\n  /** @type {?import(\"./Atlas.js\").AtlasInfo} */\n  var info = this.add_(false, id, width, height, renderCallback, opt_this);\n  if (!info) {\n    return null;\n  }\n\n  // even if no hit-detection entry is requested, we insert a fake entry into\n  // the hit-detection atlas, to make sure that the offset is the same for\n  // the original image and the hit-detection image.\n  var renderHitCallback = opt_renderHitCallback !== undefined ?\n    opt_renderHitCallback : VOID;\n\n  var hitInfo = /** @type {import(\"./Atlas.js\").AtlasInfo} */ (this.add_(true,\n    id, width, height, renderHitCallback, opt_this));\n\n  return this.mergeInfos_(info, hitInfo);\n};\n\n/**\n * @private\n * @param {boolean} isHitAtlas If the hit-detection atlases are used.\n * @param {string} id The identifier of the entry to add.\n * @param {number} width The width.\n * @param {number} height The height.\n * @param {function(CanvasRenderingContext2D, number, number)} renderCallback\n *  Called to render the new image onto an atlas image.\n * @param {Object=} opt_this Value to use as `this` when executing\n *  `renderCallback` and `renderHitCallback`.\n * @return {?import(\"./Atlas.js\").AtlasInfo}The position and atlas image for the entry,\n *  or `null` if the image is too big.\n */\nAtlasManager.prototype.add_ = function add_ (isHitAtlas, id, width, height, renderCallback, opt_this) {\n  var atlases = (isHitAtlas) ? this.hitAtlases_ : this.atlases_;\n  var atlas, info, i, ii;\n  for (i = 0, ii = atlases.length; i < ii; ++i) {\n    atlas = atlases[i];\n    info = atlas.add(id, width, height, renderCallback, opt_this);\n    if (info) {\n      return info;\n    } else if (!info && i === ii - 1) {\n      // the entry could not be added to one of the existing atlases,\n      // create a new atlas that is twice as big and try to add to this one.\n      var size = (void 0);\n      if (isHitAtlas) {\n        size = Math.min(this.currentHitSize_ * 2, this.maxSize_);\n        this.currentHitSize_ = size;\n      } else {\n        size = Math.min(this.currentSize_ * 2, this.maxSize_);\n        this.currentSize_ = size;\n      }\n      atlas = new Atlas(size, this.space_);\n      atlases.push(atlas);\n      // run the loop another time\n      ++ii;\n    }\n  }\n  return null;\n};\n\nexport default AtlasManager;\n\n//# sourceMappingURL=AtlasManager.js.map","/**\n * @module ol/render/webgl/TextReplay\n */\nimport {getUid} from '../../util.js';\nimport {asColorLike} from '../../colorlike.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport GeometryType from '../../geom/GeometryType.js';\nimport {CANVAS_LINE_DASH} from '../../has.js';\nimport {TEXT_ALIGN} from '../replay.js';\nimport {DEFAULT_FILLSTYLE, DEFAULT_FONT, DEFAULT_LINECAP, DEFAULT_LINEDASH,\n  DEFAULT_LINEDASHOFFSET, DEFAULT_LINEJOIN, DEFAULT_LINEWIDTH, DEFAULT_MITERLIMIT,\n  DEFAULT_STROKESTYLE, DEFAULT_TEXTALIGN, DEFAULT_TEXTBASELINE} from '../webgl.js';\nimport WebGLTextureReplay from './TextureReplay.js';\nimport AtlasManager from '../../style/AtlasManager.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\n\n/**\n * @typedef {Object} GlyphAtlas\n * @property {import(\"../../style/AtlasManager.js\").default} atlas\n * @property {Object<string, number>} width\n * @property {number} height\n */\n\n\nvar WebGLTextReplay = /*@__PURE__*/(function (WebGLTextureReplay) {\n  function WebGLTextReplay(tolerance, maxExtent) {\n    WebGLTextureReplay.call(this, tolerance, maxExtent);\n\n    /**\n     * @private\n     * @type {Array<HTMLCanvasElement>}\n     */\n    this.images_ = [];\n\n    /**\n     * @private\n     * @type {Array<WebGLTexture>}\n     */\n    this.textures_ = [];\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.measureCanvas_ = createCanvasContext2D(0, 0).canvas;\n\n    /**\n     * @private\n     * @type {{strokeColor: (import(\"../../colorlike.js\").ColorLike|null),\n     *         lineCap: (string|undefined),\n     *         lineDash: Array<number>,\n     *         lineDashOffset: (number|undefined),\n     *         lineJoin: (string|undefined),\n     *         lineWidth: number,\n     *         miterLimit: (number|undefined),\n     *         fillColor: (import(\"../../colorlike.js\").ColorLike|null),\n     *         font: (string|undefined),\n     *         scale: (number|undefined)}}\n     */\n    this.state_ = {\n      strokeColor: null,\n      lineCap: undefined,\n      lineDash: null,\n      lineDashOffset: undefined,\n      lineJoin: undefined,\n      lineWidth: 0,\n      miterLimit: undefined,\n      fillColor: null,\n      font: undefined,\n      scale: undefined\n    };\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.text_ = '';\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.textAlign_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.textBaseline_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.offsetX_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.offsetY_ = undefined;\n\n    /**\n     * @private\n     * @type {Object<string, GlyphAtlas>}\n     */\n    this.atlases_ = {};\n\n    /**\n     * @private\n     * @type {GlyphAtlas|undefined}\n     */\n    this.currAtlas_ = undefined;\n\n    this.scale = 1;\n\n    this.opacity = 1;\n\n  }\n\n  if ( WebGLTextureReplay ) WebGLTextReplay.__proto__ = WebGLTextureReplay;\n  WebGLTextReplay.prototype = Object.create( WebGLTextureReplay && WebGLTextureReplay.prototype );\n  WebGLTextReplay.prototype.constructor = WebGLTextReplay;\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextReplay.prototype.drawText = function drawText (geometry, feature) {\n    if (this.text_) {\n      var flatCoordinates = null;\n      var offset = 0;\n      var end = 2;\n      var stride = 2;\n      switch (geometry.getType()) {\n        case GeometryType.POINT:\n        case GeometryType.MULTI_POINT:\n          flatCoordinates = geometry.getFlatCoordinates();\n          end = flatCoordinates.length;\n          stride = geometry.getStride();\n          break;\n        case GeometryType.CIRCLE:\n          flatCoordinates = /** @type {import(\"../../geom/Circle.js\").default} */ (geometry).getCenter();\n          break;\n        case GeometryType.LINE_STRING:\n          flatCoordinates = /** @type {import(\"../../geom/LineString.js\").default} */ (geometry).getFlatMidpoint();\n          break;\n        case GeometryType.MULTI_LINE_STRING:\n          flatCoordinates = /** @type {import(\"../../geom/MultiLineString.js\").default} */ (geometry).getFlatMidpoints();\n          end = flatCoordinates.length;\n          break;\n        case GeometryType.POLYGON:\n          flatCoordinates = /** @type {import(\"../../geom/Polygon.js\").default} */ (geometry).getFlatInteriorPoint();\n          break;\n        case GeometryType.MULTI_POLYGON:\n          flatCoordinates = /** @type {import(\"../../geom/MultiPolygon.js\").default} */ (geometry).getFlatInteriorPoints();\n          end = flatCoordinates.length;\n          break;\n        default:\n      }\n      this.startIndices.push(this.indices.length);\n      this.startIndicesFeature.push(feature);\n\n      var glyphAtlas = this.currAtlas_;\n      var lines = this.text_.split('\\n');\n      var textSize = this.getTextSize_(lines);\n      var i, ii, j, jj, currX, currY, charArr, charInfo;\n      var anchorX = Math.round(textSize[0] * this.textAlign_ - this.offsetX_);\n      var anchorY = Math.round(textSize[1] * this.textBaseline_ - this.offsetY_);\n      var lineWidth = (this.state_.lineWidth / 2) * this.state_.scale;\n\n      for (i = 0, ii = lines.length; i < ii; ++i) {\n        currX = 0;\n        currY = glyphAtlas.height * i;\n        charArr = lines[i].split('');\n\n        for (j = 0, jj = charArr.length; j < jj; ++j) {\n          charInfo = glyphAtlas.atlas.getInfo(charArr[j]);\n\n          if (charInfo) {\n            var image = charInfo.image;\n\n            this.anchorX = anchorX - currX;\n            this.anchorY = anchorY - currY;\n            this.originX = j === 0 ? charInfo.offsetX - lineWidth : charInfo.offsetX;\n            this.originY = charInfo.offsetY;\n            this.height = glyphAtlas.height;\n            this.width = j === 0 || j === charArr.length - 1 ?\n              glyphAtlas.width[charArr[j]] + lineWidth : glyphAtlas.width[charArr[j]];\n            this.imageHeight = image.height;\n            this.imageWidth = image.width;\n\n            if (this.images_.length === 0) {\n              this.images_.push(image);\n            } else {\n              var currentImage = this.images_[this.images_.length - 1];\n              if (getUid(currentImage) != getUid(image)) {\n                this.groupIndices.push(this.indices.length);\n                this.images_.push(image);\n              }\n            }\n\n            this.drawText_(flatCoordinates, offset, end, stride);\n          }\n          currX += this.width;\n        }\n      }\n    }\n  };\n\n  /**\n   * @private\n   * @param {Array<string>} lines Label to draw split to lines.\n   * @return {Array<number>} Size of the label in pixels.\n   */\n  WebGLTextReplay.prototype.getTextSize_ = function getTextSize_ (lines) {\n    var self = this;\n    var glyphAtlas = this.currAtlas_;\n    var textHeight = lines.length * glyphAtlas.height;\n    //Split every line to an array of chars, sum up their width, and select the longest.\n    var textWidth = lines.map(function(str) {\n      var sum = 0;\n      for (var i = 0, ii = str.length; i < ii; ++i) {\n        var curr = str[i];\n        if (!glyphAtlas.width[curr]) {\n          self.addCharToAtlas_(curr);\n        }\n        sum += glyphAtlas.width[curr] ? glyphAtlas.width[curr] : 0;\n      }\n      return sum;\n    }).reduce(function(max, curr) {\n      return Math.max(max, curr);\n    });\n\n    return [textWidth, textHeight];\n  };\n\n  /**\n   * @private\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   */\n  WebGLTextReplay.prototype.drawText_ = function drawText_ (flatCoordinates, offset, end, stride) {\n    for (var i = offset, ii = end; i < ii; i += stride) {\n      this.drawCoordinates(flatCoordinates, offset, end, stride);\n    }\n  };\n\n  /**\n   * @private\n   * @param {string} char Character.\n   */\n  WebGLTextReplay.prototype.addCharToAtlas_ = function addCharToAtlas_ (char) {\n    if (char.length === 1) {\n      var glyphAtlas = this.currAtlas_;\n      var state = this.state_;\n      var mCtx = this.measureCanvas_.getContext('2d');\n      mCtx.font = state.font;\n      var width = Math.ceil(mCtx.measureText(char).width * state.scale);\n\n      var info = glyphAtlas.atlas.add(char, width, glyphAtlas.height,\n        function(ctx, x, y) {\n          //Parameterize the canvas\n          ctx.font = /** @type {string} */ (state.font);\n          ctx.fillStyle = state.fillColor;\n          ctx.strokeStyle = state.strokeColor;\n          ctx.lineWidth = state.lineWidth;\n          ctx.lineCap = /** @type {CanvasLineCap} */ (state.lineCap);\n          ctx.lineJoin = /** @type {CanvasLineJoin} */ (state.lineJoin);\n          ctx.miterLimit = /** @type {number} */ (state.miterLimit);\n          ctx.textAlign = 'left';\n          ctx.textBaseline = 'top';\n          if (CANVAS_LINE_DASH && state.lineDash) {\n            //FIXME: use pixelRatio\n            ctx.setLineDash(state.lineDash);\n            ctx.lineDashOffset = /** @type {number} */ (state.lineDashOffset);\n          }\n          if (state.scale !== 1) {\n            //FIXME: use pixelRatio\n            ctx.setTransform(/** @type {number} */ (state.scale), 0, 0,\n              /** @type {number} */ (state.scale), 0, 0);\n          }\n\n          //Draw the character on the canvas\n          if (state.strokeColor) {\n            ctx.strokeText(char, x, y);\n          }\n          if (state.fillColor) {\n            ctx.fillText(char, x, y);\n          }\n        });\n\n      if (info) {\n        glyphAtlas.width[char] = width;\n      }\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextReplay.prototype.finish = function finish (context) {\n    var gl = context.getGL();\n\n    this.groupIndices.push(this.indices.length);\n    this.hitDetectionGroupIndices = this.groupIndices;\n\n    // create, bind, and populate the vertices buffer\n    this.verticesBuffer = new WebGLBuffer(this.vertices);\n\n    // create, bind, and populate the indices buffer\n    this.indicesBuffer = new WebGLBuffer(this.indices);\n\n    // create textures\n    /** @type {Object<string, WebGLTexture>} */\n    var texturePerImage = {};\n\n    this.createTextures(this.textures_, this.images_, texturePerImage, gl);\n\n    this.state_ = {\n      strokeColor: null,\n      lineCap: undefined,\n      lineDash: null,\n      lineDashOffset: undefined,\n      lineJoin: undefined,\n      lineWidth: 0,\n      miterLimit: undefined,\n      fillColor: null,\n      font: undefined,\n      scale: undefined\n    };\n    this.text_ = '';\n    this.textAlign_ = undefined;\n    this.textBaseline_ = undefined;\n    this.offsetX_ = undefined;\n    this.offsetY_ = undefined;\n    this.images_ = null;\n    this.atlases_ = {};\n    this.currAtlas_ = undefined;\n    WebGLTextureReplay.prototype.finish.call(this, context);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextReplay.prototype.setTextStyle = function setTextStyle (textStyle) {\n    var state = this.state_;\n    var textFillStyle = textStyle.getFill();\n    var textStrokeStyle = textStyle.getStroke();\n    if (!textStyle || !textStyle.getText() || (!textFillStyle && !textStrokeStyle)) {\n      this.text_ = '';\n    } else {\n      if (!textFillStyle) {\n        state.fillColor = null;\n      } else {\n        var textFillStyleColor = textFillStyle.getColor();\n        state.fillColor = asColorLike(textFillStyleColor ?\n          textFillStyleColor : DEFAULT_FILLSTYLE);\n      }\n      if (!textStrokeStyle) {\n        state.strokeColor = null;\n        state.lineWidth = 0;\n      } else {\n        var textStrokeStyleColor = textStrokeStyle.getColor();\n        state.strokeColor = asColorLike(textStrokeStyleColor ?\n          textStrokeStyleColor : DEFAULT_STROKESTYLE);\n        state.lineWidth = textStrokeStyle.getWidth() || DEFAULT_LINEWIDTH;\n        state.lineCap = textStrokeStyle.getLineCap() || DEFAULT_LINECAP;\n        state.lineDashOffset = textStrokeStyle.getLineDashOffset() || DEFAULT_LINEDASHOFFSET;\n        state.lineJoin = textStrokeStyle.getLineJoin() || DEFAULT_LINEJOIN;\n        state.miterLimit = textStrokeStyle.getMiterLimit() || DEFAULT_MITERLIMIT;\n        var lineDash = textStrokeStyle.getLineDash();\n        state.lineDash = lineDash ? lineDash.slice() : DEFAULT_LINEDASH;\n      }\n      state.font = textStyle.getFont() || DEFAULT_FONT;\n      state.scale = textStyle.getScale() || 1;\n      this.text_ = /** @type {string} */ (textStyle.getText());\n      var textAlign = TEXT_ALIGN[textStyle.getTextAlign()];\n      var textBaseline = TEXT_ALIGN[textStyle.getTextBaseline()];\n      this.textAlign_ = textAlign === undefined ?\n        DEFAULT_TEXTALIGN : textAlign;\n      this.textBaseline_ = textBaseline === undefined ?\n        DEFAULT_TEXTBASELINE : textBaseline;\n      this.offsetX_ = textStyle.getOffsetX() || 0;\n      this.offsetY_ = textStyle.getOffsetY() || 0;\n      this.rotateWithView = !!textStyle.getRotateWithView();\n      this.rotation = textStyle.getRotation() || 0;\n\n      this.currAtlas_ = this.getAtlas_(state);\n    }\n  };\n\n  /**\n   * @private\n   * @param {Object} state Font attributes.\n   * @return {GlyphAtlas} Glyph atlas.\n   */\n  WebGLTextReplay.prototype.getAtlas_ = function getAtlas_ (state) {\n    var params = [];\n    for (var i in state) {\n      if (state[i] || state[i] === 0) {\n        if (Array.isArray(state[i])) {\n          params = params.concat(state[i]);\n        } else {\n          params.push(state[i]);\n        }\n      }\n    }\n    var hash = this.calculateHash_(params);\n    if (!this.atlases_[hash]) {\n      var mCtx = this.measureCanvas_.getContext('2d');\n      mCtx.font = state.font;\n      var height = Math.ceil((mCtx.measureText('M').width * 1.5 +\n          state.lineWidth / 2) * state.scale);\n\n      this.atlases_[hash] = {\n        atlas: new AtlasManager({\n          space: state.lineWidth + 1\n        }),\n        width: {},\n        height: height\n      };\n    }\n    return this.atlases_[hash];\n  };\n\n  /**\n   * @private\n   * @param {Array<string|number>} params Array of parameters.\n   * @return {string} Hash string.\n   */\n  WebGLTextReplay.prototype.calculateHash_ = function calculateHash_ (params) {\n    //TODO: Create a more performant, reliable, general hash function.\n    var hash = '';\n    for (var i = 0, ii = params.length; i < ii; ++i) {\n      hash += params[i];\n    }\n    return hash;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextReplay.prototype.getTextures = function getTextures (opt_all) {\n    return this.textures_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextReplay.prototype.getHitDetectionTextures = function getHitDetectionTextures () {\n    return this.textures_;\n  };\n\n  return WebGLTextReplay;\n}(WebGLTextureReplay));\n\n\nexport default WebGLTextReplay;\n\n//# sourceMappingURL=TextReplay.js.map","/**\n * @module ol/render/webgl/ReplayGroup\n */\n\nimport {numberSafeCompareFunction} from '../../array.js';\nimport {buffer, createOrUpdateFromCoordinate} from '../../extent.js';\nimport {isEmpty} from '../../obj.js';\nimport {ORDER} from '../replay.js';\nimport ReplayGroup from '../ReplayGroup.js';\nimport WebGLCircleReplay from './CircleReplay.js';\nimport WebGLImageReplay from './ImageReplay.js';\nimport WebGLLineStringReplay from './LineStringReplay.js';\nimport WebGLPolygonReplay from './PolygonReplay.js';\nimport WebGLTextReplay from './TextReplay.js';\n\n/**\n * @type {Array<number>}\n */\nvar HIT_DETECTION_SIZE = [1, 1];\n\n/**\n * @type {Object<import(\"../ReplayType.js\").default, typeof import(\"./Replay.js\").default>}\n */\nvar BATCH_CONSTRUCTORS = {\n  'Circle': WebGLCircleReplay,\n  'Image': WebGLImageReplay,\n  'LineString': WebGLLineStringReplay,\n  'Polygon': WebGLPolygonReplay,\n  'Text': WebGLTextReplay\n};\n\n\nvar WebGLReplayGroup = /*@__PURE__*/(function (ReplayGroup) {\n  function WebGLReplayGroup(tolerance, maxExtent, opt_renderBuffer) {\n    ReplayGroup.call(this);\n\n    /**\n     * @type {import(\"../../extent.js\").Extent}\n     * @private\n     */\n    this.maxExtent_ = maxExtent;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.tolerance_ = tolerance;\n\n    /**\n     * @type {number|undefined}\n     * @private\n     */\n    this.renderBuffer_ = opt_renderBuffer;\n\n    /**\n     * @private\n     * @type {!Object<string,\n     *        Object<import(\"../ReplayType.js\").default, import(\"./Replay.js\").default>>}\n     */\n    this.replaysByZIndex_ = {};\n\n  }\n\n  if ( ReplayGroup ) WebGLReplayGroup.__proto__ = ReplayGroup;\n  WebGLReplayGroup.prototype = Object.create( ReplayGroup && ReplayGroup.prototype );\n  WebGLReplayGroup.prototype.constructor = WebGLReplayGroup;\n\n  /**\n   * @inheritDoc\n   */\n  WebGLReplayGroup.prototype.addDeclutter = function addDeclutter (group) {\n    return [];\n  };\n\n  /**\n   * @param {import(\"../../webgl/Context.js\").default} context WebGL context.\n   * @return {function()} Delete resources function.\n   */\n  WebGLReplayGroup.prototype.getDeleteResourcesFunction = function getDeleteResourcesFunction (context) {\n    var functions = [];\n    var zKey;\n    for (zKey in this.replaysByZIndex_) {\n      var replays = this.replaysByZIndex_[zKey];\n      for (var replayKey in replays) {\n        functions.push(\n          replays[replayKey].getDeleteResourcesFunction(context));\n      }\n    }\n    return function() {\n      var arguments$1 = arguments;\n\n      var length = functions.length;\n      var result;\n      for (var i = 0; i < length; i++) {\n        result = functions[i].apply(this, arguments$1);\n      }\n      return result;\n    };\n  };\n\n  /**\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   */\n  WebGLReplayGroup.prototype.finish = function finish (context) {\n    var zKey;\n    for (zKey in this.replaysByZIndex_) {\n      var replays = this.replaysByZIndex_[zKey];\n      for (var replayKey in replays) {\n        replays[replayKey].finish(context);\n      }\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLReplayGroup.prototype.getReplay = function getReplay (zIndex, replayType) {\n    var zIndexKey = zIndex !== undefined ? zIndex.toString() : '0';\n    var replays = this.replaysByZIndex_[zIndexKey];\n    if (replays === undefined) {\n      replays = {};\n      this.replaysByZIndex_[zIndexKey] = replays;\n    }\n    var replay = replays[replayType];\n    if (replay === undefined) {\n      var Constructor = BATCH_CONSTRUCTORS[replayType];\n      replay = new Constructor(this.tolerance_, this.maxExtent_);\n      replays[replayType] = replay;\n    }\n    return replay;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLReplayGroup.prototype.isEmpty = function isEmpty$1 () {\n    return isEmpty(this.replaysByZIndex_);\n  };\n\n  /**\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {import(\"../../coordinate.js\").Coordinate} center Center.\n   * @param {number} resolution Resolution.\n   * @param {number} rotation Rotation.\n   * @param {import(\"../../size.js\").Size} size Size.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {number} opacity Global opacity.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   */\n  WebGLReplayGroup.prototype.replay = function replay (\n    context,\n    center,\n    resolution,\n    rotation,\n    size,\n    pixelRatio,\n    opacity,\n    skippedFeaturesHash\n  ) {\n    /** @type {Array<number>} */\n    var zs = Object.keys(this.replaysByZIndex_).map(Number);\n    zs.sort(numberSafeCompareFunction);\n\n    var i, ii, j, jj, replays, replay;\n    for (i = 0, ii = zs.length; i < ii; ++i) {\n      replays = this.replaysByZIndex_[zs[i].toString()];\n      for (j = 0, jj = ORDER.length; j < jj; ++j) {\n        replay = replays[ORDER[j]];\n        if (replay !== undefined) {\n          replay.replay(context,\n            center, resolution, rotation, size, pixelRatio,\n            opacity, skippedFeaturesHash,\n            undefined, false);\n        }\n      }\n    }\n  };\n\n  /**\n   * @private\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {import(\"../../coordinate.js\").Coordinate} center Center.\n   * @param {number} resolution Resolution.\n   * @param {number} rotation Rotation.\n   * @param {import(\"../../size.js\").Size} size Size.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {number} opacity Global opacity.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   * @param {function((import(\"../../Feature.js\").default|import(\"../Feature.js\").default)): T|undefined} featureCallback Feature callback.\n   * @param {boolean} oneByOne Draw features one-by-one for the hit-detecion.\n   * @param {import(\"../../extent.js\").Extent=} opt_hitExtent Hit extent: Only features intersecting\n   *  this extent are checked.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  WebGLReplayGroup.prototype.replayHitDetection_ = function replayHitDetection_ (\n    context,\n    center,\n    resolution,\n    rotation,\n    size,\n    pixelRatio,\n    opacity,\n    skippedFeaturesHash,\n    featureCallback,\n    oneByOne,\n    opt_hitExtent\n  ) {\n    /** @type {Array<number>} */\n    var zs = Object.keys(this.replaysByZIndex_).map(Number);\n    zs.sort(function(a, b) {\n      return b - a;\n    });\n\n    var i, ii, j, replays, replay, result;\n    for (i = 0, ii = zs.length; i < ii; ++i) {\n      replays = this.replaysByZIndex_[zs[i].toString()];\n      for (j = ORDER.length - 1; j >= 0; --j) {\n        replay = replays[ORDER[j]];\n        if (replay !== undefined) {\n          result = replay.replay(context,\n            center, resolution, rotation, size, pixelRatio, opacity,\n            skippedFeaturesHash, featureCallback, oneByOne, opt_hitExtent);\n          if (result) {\n            return result;\n          }\n        }\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {import(\"../../coordinate.js\").Coordinate} center Center.\n   * @param {number} resolution Resolution.\n   * @param {number} rotation Rotation.\n   * @param {import(\"../../size.js\").Size} size Size.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {number} opacity Global opacity.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   * @param {function((import(\"../../Feature.js\").default|import(\"../Feature.js\").default)): T|undefined} callback Feature callback.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  WebGLReplayGroup.prototype.forEachFeatureAtCoordinate = function forEachFeatureAtCoordinate (\n    coordinate,\n    context,\n    center,\n    resolution,\n    rotation,\n    size,\n    pixelRatio,\n    opacity,\n    skippedFeaturesHash,\n    callback\n  ) {\n    var gl = context.getGL();\n    gl.bindFramebuffer(\n      gl.FRAMEBUFFER, context.getHitDetectionFramebuffer());\n\n\n    /**\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    var hitExtent;\n    if (this.renderBuffer_ !== undefined) {\n      // build an extent around the coordinate, so that only features that\n      // intersect this extent are checked\n      hitExtent = buffer(createOrUpdateFromCoordinate(coordinate), resolution * this.renderBuffer_);\n    }\n\n    return this.replayHitDetection_(context,\n      coordinate, resolution, rotation, HIT_DETECTION_SIZE,\n      pixelRatio, opacity, skippedFeaturesHash,\n      /**\n       * @param {import(\"../../Feature.js\").default|import(\"../Feature.js\").default} feature Feature.\n       * @return {?} Callback result.\n       */\n      function(feature) {\n        var imageData = new Uint8Array(4);\n        gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, imageData);\n\n        if (imageData[3] > 0) {\n          var result = callback(feature);\n          if (result) {\n            return result;\n          }\n        }\n      }, true, hitExtent);\n  };\n\n  /**\n   * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {import(\"../../coordinate.js\").Coordinate} center Center.\n   * @param {number} resolution Resolution.\n   * @param {number} rotation Rotation.\n   * @param {import(\"../../size.js\").Size} size Size.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {number} opacity Global opacity.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   * @return {boolean} Is there a feature at the given coordinate?\n   */\n  WebGLReplayGroup.prototype.hasFeatureAtCoordinate = function hasFeatureAtCoordinate (\n    coordinate,\n    context,\n    center,\n    resolution,\n    rotation,\n    size,\n    pixelRatio,\n    opacity,\n    skippedFeaturesHash\n  ) {\n    var gl = context.getGL();\n    gl.bindFramebuffer(\n      gl.FRAMEBUFFER, context.getHitDetectionFramebuffer());\n\n    var hasFeature = this.replayHitDetection_(context,\n      coordinate, resolution, rotation, HIT_DETECTION_SIZE,\n      pixelRatio, opacity, skippedFeaturesHash,\n      /**\n       * @param {import(\"../../Feature.js\").default|import(\"../Feature.js\").default} feature Feature.\n       * @return {boolean} Is there a feature?\n       */\n      function(feature) {\n        var imageData = new Uint8Array(4);\n        gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, imageData);\n        return imageData[3] > 0;\n      }, false);\n\n    return hasFeature !== undefined;\n  };\n\n  return WebGLReplayGroup;\n}(ReplayGroup));\n\n\nexport default WebGLReplayGroup;\n\n//# sourceMappingURL=ReplayGroup.js.map","/**\n * @module ol/render/webgl/Immediate\n */\n\nimport {intersects} from '../../extent.js';\nimport GeometryType from '../../geom/GeometryType.js';\nimport ReplayType from '../ReplayType.js';\nimport VectorContext from '../VectorContext.js';\nimport WebGLReplayGroup from './ReplayGroup.js';\n\nvar WebGLImmediateRenderer = /*@__PURE__*/(function (VectorContext) {\n  function WebGLImmediateRenderer(context, center, resolution, rotation, size, extent, pixelRatio) {\n    VectorContext.call(this);\n\n    /**\n     * @private\n     */\n    this.context_ = context;\n\n    /**\n     * @private\n     */\n    this.center_ = center;\n\n    /**\n     * @private\n     */\n    this.extent_ = extent;\n\n    /**\n     * @private\n     */\n    this.pixelRatio_ = pixelRatio;\n\n    /**\n     * @private\n     */\n    this.size_ = size;\n\n    /**\n     * @private\n     */\n    this.rotation_ = rotation;\n\n    /**\n     * @private\n     */\n    this.resolution_ = resolution;\n\n    /**\n     * @private\n     * @type {import(\"../../style/Image.js\").default}\n     */\n    this.imageStyle_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../style/Fill.js\").default}\n     */\n    this.fillStyle_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../style/Stroke.js\").default}\n     */\n    this.strokeStyle_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../style/Text.js\").default}\n     */\n    this.textStyle_ = null;\n\n  }\n\n  if ( VectorContext ) WebGLImmediateRenderer.__proto__ = VectorContext;\n  WebGLImmediateRenderer.prototype = Object.create( VectorContext && VectorContext.prototype );\n  WebGLImmediateRenderer.prototype.constructor = WebGLImmediateRenderer;\n\n  /**\n   * @param {import(\"./ReplayGroup.js\").default} replayGroup Replay group.\n   * @param {import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default} geometry Geometry.\n   * @private\n   */\n  WebGLImmediateRenderer.prototype.drawText_ = function drawText_ (replayGroup, geometry) {\n    var context = this.context_;\n    var replay = /** @type {import(\"./TextReplay.js\").default} */ (\n      replayGroup.getReplay(0, ReplayType.TEXT));\n    replay.setTextStyle(this.textStyle_);\n    replay.drawText(geometry, null);\n    replay.finish(context);\n    // default colors\n    var opacity = 1;\n    /** @type {Object<string, boolean>} */\n    var skippedFeatures = {};\n    var featureCallback;\n    var oneByOne = false;\n    replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n      this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n      oneByOne);\n    replay.getDeleteResourcesFunction(context)();\n  };\n\n  /**\n   * Set the rendering style.  Note that since this is an immediate rendering API,\n   * any `zIndex` on the provided style will be ignored.\n   *\n   * @param {import(\"../../style/Style.js\").default} style The rendering style.\n   * @override\n   * @api\n   */\n  WebGLImmediateRenderer.prototype.setStyle = function setStyle (style) {\n    this.setFillStrokeStyle(style.getFill(), style.getStroke());\n    this.setImageStyle(style.getImage());\n    this.setTextStyle(style.getText());\n  };\n\n  /**\n   * Render a geometry into the canvas.  Call\n   * {@link ol/render/webgl/Immediate#setStyle} first to set the rendering style.\n   *\n   * @param {import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default} geometry The geometry to render.\n   * @override\n   * @api\n   */\n  WebGLImmediateRenderer.prototype.drawGeometry = function drawGeometry (geometry) {\n    var type = geometry.getType();\n    switch (type) {\n      case GeometryType.POINT:\n        this.drawPoint(/** @type {import(\"../../geom/Point.js\").default} */ (geometry), null);\n        break;\n      case GeometryType.LINE_STRING:\n        this.drawLineString(/** @type {import(\"../../geom/LineString.js\").default} */ (geometry), null);\n        break;\n      case GeometryType.POLYGON:\n        this.drawPolygon(/** @type {import(\"../../geom/Polygon.js\").default} */ (geometry), null);\n        break;\n      case GeometryType.MULTI_POINT:\n        this.drawMultiPoint(/** @type {import(\"../../geom/MultiPoint.js\").default} */ (geometry), null);\n        break;\n      case GeometryType.MULTI_LINE_STRING:\n        this.drawMultiLineString(/** @type {import(\"../../geom/MultiLineString.js\").default} */ (geometry), null);\n        break;\n      case GeometryType.MULTI_POLYGON:\n        this.drawMultiPolygon(/** @type {import(\"../../geom/MultiPolygon.js\").default} */ (geometry), null);\n        break;\n      case GeometryType.GEOMETRY_COLLECTION:\n        this.drawGeometryCollection(/** @type {import(\"../../geom/GeometryCollection.js\").default} */ (geometry), null);\n        break;\n      case GeometryType.CIRCLE:\n        this.drawCircle(/** @type {import(\"../../geom/Circle.js\").default} */ (geometry), null);\n        break;\n      default:\n        // pass\n    }\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  WebGLImmediateRenderer.prototype.drawFeature = function drawFeature (feature, style) {\n    var geometry = style.getGeometryFunction()(feature);\n    if (!geometry || !intersects(this.extent_, geometry.getExtent())) {\n      return;\n    }\n    this.setStyle(style);\n    this.drawGeometry(geometry);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.drawGeometryCollection = function drawGeometryCollection (geometry, data) {\n    var geometries = geometry.getGeometriesArray();\n    var i, ii;\n    for (i = 0, ii = geometries.length; i < ii; ++i) {\n      this.drawGeometry(geometries[i]);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.drawPoint = function drawPoint (geometry, data) {\n    var context = this.context_;\n    var replayGroup = new WebGLReplayGroup(1, this.extent_);\n    var replay = /** @type {import(\"./ImageReplay.js\").default} */ (\n      replayGroup.getReplay(0, ReplayType.IMAGE));\n    replay.setImageStyle(this.imageStyle_);\n    replay.drawPoint(geometry, data);\n    replay.finish(context);\n    // default colors\n    var opacity = 1;\n    /** @type {Object<string, boolean>} */\n    var skippedFeatures = {};\n    var featureCallback;\n    var oneByOne = false;\n    replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n      this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n      oneByOne);\n    replay.getDeleteResourcesFunction(context)();\n\n    if (this.textStyle_) {\n      this.drawText_(replayGroup, geometry);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.drawMultiPoint = function drawMultiPoint (geometry, data) {\n    var context = this.context_;\n    var replayGroup = new WebGLReplayGroup(1, this.extent_);\n    var replay = /** @type {import(\"./ImageReplay.js\").default} */ (\n      replayGroup.getReplay(0, ReplayType.IMAGE));\n    replay.setImageStyle(this.imageStyle_);\n    replay.drawMultiPoint(geometry, data);\n    replay.finish(context);\n    var opacity = 1;\n    /** @type {Object<string, boolean>} */\n    var skippedFeatures = {};\n    var featureCallback;\n    var oneByOne = false;\n    replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n      this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n      oneByOne);\n    replay.getDeleteResourcesFunction(context)();\n\n    if (this.textStyle_) {\n      this.drawText_(replayGroup, geometry);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.drawLineString = function drawLineString (geometry, data) {\n    var context = this.context_;\n    var replayGroup = new WebGLReplayGroup(1, this.extent_);\n    var replay = /** @type {import(\"./LineStringReplay.js\").default} */ (\n      replayGroup.getReplay(0, ReplayType.LINE_STRING));\n    replay.setFillStrokeStyle(null, this.strokeStyle_);\n    replay.drawLineString(geometry, data);\n    replay.finish(context);\n    var opacity = 1;\n    /** @type {Object<string, boolean>} */\n    var skippedFeatures = {};\n    var featureCallback;\n    var oneByOne = false;\n    replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n      this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n      oneByOne);\n    replay.getDeleteResourcesFunction(context)();\n\n    if (this.textStyle_) {\n      this.drawText_(replayGroup, geometry);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.drawMultiLineString = function drawMultiLineString (geometry, data) {\n    var context = this.context_;\n    var replayGroup = new WebGLReplayGroup(1, this.extent_);\n    var replay = /** @type {import(\"./LineStringReplay.js\").default} */ (\n      replayGroup.getReplay(0, ReplayType.LINE_STRING));\n    replay.setFillStrokeStyle(null, this.strokeStyle_);\n    replay.drawMultiLineString(geometry, data);\n    replay.finish(context);\n    var opacity = 1;\n    /** @type {Object<string, boolean>} */\n    var skippedFeatures = {};\n    var featureCallback;\n    var oneByOne = false;\n    replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n      this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n      oneByOne);\n    replay.getDeleteResourcesFunction(context)();\n\n    if (this.textStyle_) {\n      this.drawText_(replayGroup, geometry);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.drawPolygon = function drawPolygon (geometry, data) {\n    var context = this.context_;\n    var replayGroup = new WebGLReplayGroup(1, this.extent_);\n    var replay = /** @type {import(\"./PolygonReplay.js\").default} */ (\n      replayGroup.getReplay(0, ReplayType.POLYGON));\n    replay.setFillStrokeStyle(this.fillStyle_, this.strokeStyle_);\n    replay.drawPolygon(geometry, data);\n    replay.finish(context);\n    var opacity = 1;\n    /** @type {Object<string, boolean>} */\n    var skippedFeatures = {};\n    var featureCallback;\n    var oneByOne = false;\n    replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n      this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n      oneByOne);\n    replay.getDeleteResourcesFunction(context)();\n\n    if (this.textStyle_) {\n      this.drawText_(replayGroup, geometry);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.drawMultiPolygon = function drawMultiPolygon (geometry, data) {\n    var context = this.context_;\n    var replayGroup = new WebGLReplayGroup(1, this.extent_);\n    var replay = /** @type {import(\"./PolygonReplay.js\").default} */ (\n      replayGroup.getReplay(0, ReplayType.POLYGON));\n    replay.setFillStrokeStyle(this.fillStyle_, this.strokeStyle_);\n    replay.drawMultiPolygon(geometry, data);\n    replay.finish(context);\n    var opacity = 1;\n    /** @type {Object<string, boolean>} */\n    var skippedFeatures = {};\n    var featureCallback;\n    var oneByOne = false;\n    replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n      this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n      oneByOne);\n    replay.getDeleteResourcesFunction(context)();\n\n    if (this.textStyle_) {\n      this.drawText_(replayGroup, geometry);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.drawCircle = function drawCircle (geometry, data) {\n    var context = this.context_;\n    var replayGroup = new WebGLReplayGroup(1, this.extent_);\n    var replay = /** @type {import(\"./CircleReplay.js\").default} */ (\n      replayGroup.getReplay(0, ReplayType.CIRCLE));\n    replay.setFillStrokeStyle(this.fillStyle_, this.strokeStyle_);\n    replay.drawCircle(geometry, data);\n    replay.finish(context);\n    var opacity = 1;\n    /** @type {Object<string, boolean>} */\n    var skippedFeatures = {};\n    var featureCallback;\n    var oneByOne = false;\n    replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n      this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n      oneByOne);\n    replay.getDeleteResourcesFunction(context)();\n\n    if (this.textStyle_) {\n      this.drawText_(replayGroup, geometry);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.setImageStyle = function setImageStyle (imageStyle) {\n    this.imageStyle_ = imageStyle;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.setFillStrokeStyle = function setFillStrokeStyle (fillStyle, strokeStyle) {\n    this.fillStyle_ = fillStyle;\n    this.strokeStyle_ = strokeStyle;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.setTextStyle = function setTextStyle (textStyle) {\n    this.textStyle_ = textStyle;\n  };\n\n  return WebGLImmediateRenderer;\n}(VectorContext));\n\n\nexport default WebGLImmediateRenderer;\n\n//# sourceMappingURL=Immediate.js.map","/**\n * @module ol/renderer/webgl/defaultmapshader\n */\n// This file is automatically generated, do not edit.\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../webgl.js';\nimport WebGLFragment from '../../webgl/Fragment.js';\nimport WebGLVertex from '../../webgl/Vertex.js';\n\nexport var fragment = new WebGLFragment(DEBUG_WEBGL ?\n  'precision mediump float;\\nvarying vec2 v_texCoord;\\n\\n\\nuniform float u_opacity;\\nuniform sampler2D u_texture;\\n\\nvoid main(void) {\\n  vec4 texColor = texture2D(u_texture, v_texCoord);\\n  gl_FragColor.rgb = texColor.rgb;\\n  gl_FragColor.a = texColor.a * u_opacity;\\n}\\n' :\n  'precision mediump float;varying vec2 a;uniform float f;uniform sampler2D g;void main(void){vec4 texColor=texture2D(g,a);gl_FragColor.rgb=texColor.rgb;gl_FragColor.a=texColor.a*f;}');\n\nexport var vertex = new WebGLVertex(DEBUG_WEBGL ?\n  'varying vec2 v_texCoord;\\n\\n\\nattribute vec2 a_position;\\nattribute vec2 a_texCoord;\\n\\nuniform mat4 u_texCoordMatrix;\\nuniform mat4 u_projectionMatrix;\\n\\nvoid main(void) {\\n  gl_Position = u_projectionMatrix * vec4(a_position, 0., 1.);\\n  v_texCoord = (u_texCoordMatrix * vec4(a_texCoord, 0., 1.)).st;\\n}\\n\\n\\n' :\n  'varying vec2 a;attribute vec2 b;attribute vec2 c;uniform mat4 d;uniform mat4 e;void main(void){gl_Position=e*vec4(b,0.,1.);a=(d*vec4(c,0.,1.)).st;}');\n\n//# sourceMappingURL=defaultmapshader.js.map","/**\n * @module ol/renderer/webgl/defaultmapshader/Locations\n */\n// This file is automatically generated, do not edit\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../webgl.js';\n\nvar Locations = function Locations(gl, program) {\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_texCoordMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_texCoordMatrix' : 'd');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_projectionMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_projectionMatrix' : 'e');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_opacity = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_opacity' : 'f');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_texture = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_texture' : 'g');\n\n  /**\n   * @type {number}\n   */\n  this.a_position = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_position' : 'b');\n\n  /**\n   * @type {number}\n   */\n  this.a_texCoord = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_texCoord' : 'c');\n\n};\n\nexport default Locations;\n\n//# sourceMappingURL=Locations.js.map","/**\n * @module ol/renderer/webgl/Layer\n */\nimport {abstract} from '../../util.js';\nimport RenderEvent from '../../render/Event.js';\nimport RenderEventType from '../../render/EventType.js';\nimport WebGLImmediateRenderer from '../../render/webgl/Immediate.js';\nimport LayerRenderer from '../Layer.js';\nimport {fragment, vertex} from './defaultmapshader.js';\nimport Locations from './defaultmapshader/Locations.js';\nimport {create as createTransform} from '../../transform.js';\nimport {create, fromTransform} from '../../vec/mat4.js';\nimport {ARRAY_BUFFER, FRAMEBUFFER, FLOAT, TEXTURE_2D,\n  TRIANGLE_STRIP, COLOR_ATTACHMENT0} from '../../webgl.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\nimport {createEmptyTexture} from '../../webgl/Context.js';\n\n/**\n * @abstract\n */\nvar WebGLLayerRenderer = /*@__PURE__*/(function (LayerRenderer) {\n  function WebGLLayerRenderer(mapRenderer, layer) {\n\n    LayerRenderer.call(this, layer);\n\n    /**\n     * @protected\n     * @type {import(\"./Map.js\").default}\n     */\n    this.mapRenderer = mapRenderer;\n\n    /**\n     * @private\n     * @type {import(\"../../webgl/Buffer.js\").default}\n     */\n    this.arrayBuffer_ = new WebGLBuffer([\n      -1, -1, 0, 0,\n      1, -1, 1, 0,\n      -1, 1, 0, 1,\n      1, 1, 1, 1\n    ]);\n\n    /**\n     * @protected\n     * @type {WebGLTexture}\n     */\n    this.texture = null;\n\n    /**\n     * @protected\n     * @type {WebGLFramebuffer}\n     */\n    this.framebuffer = null;\n\n    /**\n     * @protected\n     * @type {number|undefined}\n     */\n    this.framebufferDimension = undefined;\n\n    /**\n     * @protected\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.texCoordMatrix = createTransform();\n\n    /**\n     * @protected\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.projectionMatrix = createTransform();\n\n    /**\n     * @type {Array<number>}\n     * @private\n     */\n    this.tmpMat4_ = create();\n\n    /**\n     * @private\n     * @type {import(\"./defaultmapshader/Locations.js\").default}\n     */\n    this.defaultLocations_ = null;\n\n  }\n\n  if ( LayerRenderer ) WebGLLayerRenderer.__proto__ = LayerRenderer;\n  WebGLLayerRenderer.prototype = Object.create( LayerRenderer && LayerRenderer.prototype );\n  WebGLLayerRenderer.prototype.constructor = WebGLLayerRenderer;\n\n  /**\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {number} framebufferDimension Framebuffer dimension.\n   * @protected\n   */\n  WebGLLayerRenderer.prototype.bindFramebuffer = function bindFramebuffer (frameState, framebufferDimension) {\n\n    var gl = this.mapRenderer.getGL();\n\n    if (this.framebufferDimension === undefined ||\n        this.framebufferDimension != framebufferDimension) {\n      /**\n       * @param {WebGLRenderingContext} gl GL.\n       * @param {WebGLFramebuffer} framebuffer Framebuffer.\n       * @param {WebGLTexture} texture Texture.\n       */\n      var postRenderFunction = function(gl, framebuffer, texture) {\n        if (!gl.isContextLost()) {\n          gl.deleteFramebuffer(framebuffer);\n          gl.deleteTexture(texture);\n        }\n      }.bind(null, gl, this.framebuffer, this.texture);\n\n      frameState.postRenderFunctions.push(\n        /** @type {import(\"../../PluggableMap.js\").PostRenderFunction} */ (postRenderFunction)\n      );\n\n      var texture = createEmptyTexture(\n        gl, framebufferDimension, framebufferDimension);\n\n      var framebuffer = gl.createFramebuffer();\n      gl.bindFramebuffer(FRAMEBUFFER, framebuffer);\n      gl.framebufferTexture2D(FRAMEBUFFER,\n        COLOR_ATTACHMENT0, TEXTURE_2D, texture, 0);\n\n      this.texture = texture;\n      this.framebuffer = framebuffer;\n      this.framebufferDimension = framebufferDimension;\n\n    } else {\n      gl.bindFramebuffer(FRAMEBUFFER, this.framebuffer);\n    }\n\n  };\n\n  /**\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../layer/Layer.js\").State} layerState Layer state.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   */\n  WebGLLayerRenderer.prototype.composeFrame = function composeFrame (frameState, layerState, context) {\n\n    this.dispatchComposeEvent_(RenderEventType.PRECOMPOSE, context, frameState);\n\n    context.bindBuffer(ARRAY_BUFFER, this.arrayBuffer_);\n\n    var gl = context.getGL();\n\n    var program = context.getProgram(fragment, vertex);\n\n    var locations;\n    if (!this.defaultLocations_) {\n      locations = new Locations(gl, program);\n      this.defaultLocations_ = locations;\n    } else {\n      locations = this.defaultLocations_;\n    }\n\n    if (context.useProgram(program)) {\n      gl.enableVertexAttribArray(locations.a_position);\n      gl.vertexAttribPointer(\n        locations.a_position, 2, FLOAT, false, 16, 0);\n      gl.enableVertexAttribArray(locations.a_texCoord);\n      gl.vertexAttribPointer(\n        locations.a_texCoord, 2, FLOAT, false, 16, 8);\n      gl.uniform1i(locations.u_texture, 0);\n    }\n\n    gl.uniformMatrix4fv(locations.u_texCoordMatrix, false,\n      fromTransform(this.tmpMat4_, this.getTexCoordMatrix()));\n    gl.uniformMatrix4fv(locations.u_projectionMatrix, false,\n      fromTransform(this.tmpMat4_, this.getProjectionMatrix()));\n    gl.uniform1f(locations.u_opacity, layerState.opacity);\n    gl.bindTexture(TEXTURE_2D, this.getTexture());\n    gl.drawArrays(TRIANGLE_STRIP, 0, 4);\n\n    this.dispatchComposeEvent_(RenderEventType.POSTCOMPOSE, context, frameState);\n  };\n\n  /**\n   * @param {import(\"../../render/EventType.js\").default} type Event type.\n   * @param {import(\"../../webgl/Context.js\").default} context WebGL context.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @private\n   */\n  WebGLLayerRenderer.prototype.dispatchComposeEvent_ = function dispatchComposeEvent_ (type, context, frameState) {\n    var layer = this.getLayer();\n    if (layer.hasListener(type)) {\n      var viewState = frameState.viewState;\n      var resolution = viewState.resolution;\n      var pixelRatio = frameState.pixelRatio;\n      var extent = frameState.extent;\n      var center = viewState.center;\n      var rotation = viewState.rotation;\n      var size = frameState.size;\n\n      var render = new WebGLImmediateRenderer(\n        context, center, resolution, rotation, size, extent, pixelRatio);\n      var composeEvent = new RenderEvent(\n        type, render, frameState, null, context);\n      layer.dispatchEvent(composeEvent);\n    }\n  };\n\n  /**\n   * @return {!import(\"../../transform.js\").Transform} Matrix.\n   */\n  WebGLLayerRenderer.prototype.getTexCoordMatrix = function getTexCoordMatrix () {\n    return this.texCoordMatrix;\n  };\n\n  /**\n   * @return {WebGLTexture} Texture.\n   */\n  WebGLLayerRenderer.prototype.getTexture = function getTexture () {\n    return this.texture;\n  };\n\n  /**\n   * @return {!import(\"../../transform.js\").Transform} Matrix.\n   */\n  WebGLLayerRenderer.prototype.getProjectionMatrix = function getProjectionMatrix () {\n    return this.projectionMatrix;\n  };\n\n  /**\n   * Handle webglcontextlost.\n   */\n  WebGLLayerRenderer.prototype.handleWebGLContextLost = function handleWebGLContextLost () {\n    this.texture = null;\n    this.framebuffer = null;\n    this.framebufferDimension = undefined;\n  };\n\n  /**\n   * @abstract\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../layer/Layer.js\").State} layerState Layer state.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @return {boolean} whether composeFrame should be called.\n   */\n  WebGLLayerRenderer.prototype.prepareFrame = function prepareFrame (frameState, layerState, context) {\n    return abstract();\n  };\n\n  /**\n   * @abstract\n   * @param {import(\"../../pixel.js\").Pixel} pixel Pixel.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState FrameState.\n   * @param {function(this: S, import(\"../../layer/Layer.js\").default, (Uint8ClampedArray|Uint8Array)): T} callback Layer\n   *     callback.\n   * @param {S} thisArg Value to use as `this` when executing `callback`.\n   * @return {T|undefined} Callback result.\n   * @template S,T,U\n   */\n  WebGLLayerRenderer.prototype.forEachLayerAtPixel = function forEachLayerAtPixel (pixel, frameState, callback, thisArg) {\n    return abstract();\n  };\n\n  return WebGLLayerRenderer;\n}(LayerRenderer));\n\n\nexport default WebGLLayerRenderer;\n\n//# sourceMappingURL=Layer.js.map","/**\n * @module ol/renderer/webgl/ImageLayer\n */\nimport {ENABLE_RASTER_REPROJECTION} from '../../reproj/common.js';\nimport LayerType from '../../LayerType.js';\nimport ViewHint from '../../ViewHint.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {getIntersection, isEmpty} from '../../extent.js';\nimport WebGLLayerRenderer from './Layer.js';\nimport {\n  create as createTransform,\n  rotate as rotateTransform,\n  translate as translateTransform,\n  scale as scaleTransform,\n  reset as resetTransform,\n  apply as applyTransform,\n  invert as invertTransform,\n  multiply as multiplyTransform\n} from '../../transform.js';\nimport {CLAMP_TO_EDGE} from '../../webgl.js';\nimport {createTexture} from '../../webgl/Context.js';\n\n/**\n * @classdesc\n * WebGL renderer for image layers.\n * @api\n */\nvar WebGLImageLayerRenderer = /*@__PURE__*/(function (WebGLLayerRenderer) {\n  function WebGLImageLayerRenderer(mapRenderer, imageLayer) {\n\n    WebGLLayerRenderer.call(this, mapRenderer, imageLayer);\n\n    /**\n     * The last rendered image.\n     * @private\n     * @type {?import(\"../../ImageBase.js\").default}\n     */\n    this.image_ = null;\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.hitCanvasContext_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../../transform.js\").Transform}\n     */\n    this.hitTransformationMatrix_ = null;\n\n  }\n\n  if ( WebGLLayerRenderer ) WebGLImageLayerRenderer.__proto__ = WebGLLayerRenderer;\n  WebGLImageLayerRenderer.prototype = Object.create( WebGLLayerRenderer && WebGLLayerRenderer.prototype );\n  WebGLImageLayerRenderer.prototype.constructor = WebGLImageLayerRenderer;\n\n  /**\n   * @param {import(\"../../ImageBase.js\").default} image Image.\n   * @private\n   * @return {WebGLTexture} Texture.\n   */\n  WebGLImageLayerRenderer.prototype.createTexture_ = function createTexture_ (image) {\n\n    // We meet the conditions to work with non-power of two textures.\n    // http://www.khronos.org/webgl/wiki/WebGL_and_OpenGL_Differences#Non-Power_of_Two_Texture_Support\n    // http://learningwebgl.com/blog/?p=2101\n\n    var imageElement = image.getImage();\n    var gl = this.mapRenderer.getGL();\n\n    return createTexture(\n      gl, imageElement, CLAMP_TO_EDGE, CLAMP_TO_EDGE);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImageLayerRenderer.prototype.prepareFrame = function prepareFrame (frameState, layerState, context) {\n\n    var gl = this.mapRenderer.getGL();\n\n    var pixelRatio = frameState.pixelRatio;\n    var viewState = frameState.viewState;\n    var viewCenter = viewState.center;\n    var viewResolution = viewState.resolution;\n    var viewRotation = viewState.rotation;\n\n    var image = this.image_;\n    var texture = this.texture;\n    var imageLayer = /** @type {import(\"../../layer/Image.js\").default} */ (this.getLayer());\n    var imageSource = /** @type {import(\"../../source/Image.js\").default} */ (imageLayer.getSource());\n\n    var hints = frameState.viewHints;\n\n    var renderedExtent = frameState.extent;\n    if (layerState.extent !== undefined) {\n      renderedExtent = getIntersection(renderedExtent, layerState.extent);\n    }\n    if (!hints[ViewHint.ANIMATING] && !hints[ViewHint.INTERACTING] &&\n        !isEmpty(renderedExtent)) {\n      var projection = viewState.projection;\n      if (!ENABLE_RASTER_REPROJECTION) {\n        var sourceProjection = imageSource.getProjection();\n        if (sourceProjection) {\n          projection = sourceProjection;\n        }\n      }\n      var image_ = imageSource.getImage(renderedExtent, viewResolution,\n        pixelRatio, projection);\n      if (image_) {\n        var loaded = this.loadImage(image_);\n        if (loaded) {\n          image = image_;\n          texture = this.createTexture_(image_);\n          if (this.texture) {\n            /**\n             * @param {WebGLRenderingContext} gl GL.\n             * @param {WebGLTexture} texture Texture.\n             */\n            var postRenderFunction = function(gl, texture) {\n              if (!gl.isContextLost()) {\n                gl.deleteTexture(texture);\n              }\n            }.bind(null, gl, this.texture);\n            frameState.postRenderFunctions.push(\n              /** @type {import(\"../../PluggableMap.js\").PostRenderFunction} */ (postRenderFunction)\n            );\n          }\n        }\n      }\n    }\n\n    if (image) {\n      var canvas = this.mapRenderer.getContext().getCanvas();\n\n      this.updateProjectionMatrix_(canvas.width, canvas.height,\n        pixelRatio, viewCenter, viewResolution, viewRotation,\n        image.getExtent());\n      this.hitTransformationMatrix_ = null;\n\n      // Translate and scale to flip the Y coord.\n      var texCoordMatrix = this.texCoordMatrix;\n      resetTransform(texCoordMatrix);\n      scaleTransform(texCoordMatrix, 1, -1);\n      translateTransform(texCoordMatrix, 0, -1);\n\n      this.image_ = image;\n      this.texture = texture;\n    }\n\n    return !!image;\n  };\n\n  /**\n   * @param {number} canvasWidth Canvas width.\n   * @param {number} canvasHeight Canvas height.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../../coordinate.js\").Coordinate} viewCenter View center.\n   * @param {number} viewResolution View resolution.\n   * @param {number} viewRotation View rotation.\n   * @param {import(\"../../extent.js\").Extent} imageExtent Image extent.\n   * @private\n   */\n  WebGLImageLayerRenderer.prototype.updateProjectionMatrix_ = function updateProjectionMatrix_ (\n    canvasWidth,\n    canvasHeight,\n    pixelRatio,\n    viewCenter,\n    viewResolution,\n    viewRotation,\n    imageExtent\n  ) {\n\n    var canvasExtentWidth = canvasWidth * viewResolution;\n    var canvasExtentHeight = canvasHeight * viewResolution;\n\n    var projectionMatrix = this.projectionMatrix;\n    resetTransform(projectionMatrix);\n    scaleTransform(projectionMatrix,\n      pixelRatio * 2 / canvasExtentWidth,\n      pixelRatio * 2 / canvasExtentHeight);\n    rotateTransform(projectionMatrix, -viewRotation);\n    translateTransform(projectionMatrix,\n      imageExtent[0] - viewCenter[0],\n      imageExtent[1] - viewCenter[1]);\n    scaleTransform(projectionMatrix,\n      (imageExtent[2] - imageExtent[0]) / 2,\n      (imageExtent[3] - imageExtent[1]) / 2);\n    translateTransform(projectionMatrix, 1, 1);\n\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImageLayerRenderer.prototype.forEachLayerAtPixel = function forEachLayerAtPixel (pixel, frameState, callback, thisArg) {\n    if (!this.image_ || !this.image_.getImage()) {\n      return undefined;\n    }\n\n    var imageSize =\n        [this.image_.getImage().width, this.image_.getImage().height];\n\n    if (!this.hitTransformationMatrix_) {\n      this.hitTransformationMatrix_ = this.getHitTransformationMatrix_(\n        frameState.size, imageSize);\n    }\n\n    var pixelOnFrameBuffer = applyTransform(\n      this.hitTransformationMatrix_, pixel.slice());\n\n    if (pixelOnFrameBuffer[0] < 0 || pixelOnFrameBuffer[0] > imageSize[0] ||\n        pixelOnFrameBuffer[1] < 0 || pixelOnFrameBuffer[1] > imageSize[1]) {\n      // outside the image, no need to check\n      return undefined;\n    }\n\n    if (!this.hitCanvasContext_) {\n      this.hitCanvasContext_ = createCanvasContext2D(1, 1);\n    }\n\n    this.hitCanvasContext_.clearRect(0, 0, 1, 1);\n    this.hitCanvasContext_.drawImage(this.image_.getImage(),\n      pixelOnFrameBuffer[0], pixelOnFrameBuffer[1], 1, 1, 0, 0, 1, 1);\n\n    var imageData = this.hitCanvasContext_.getImageData(0, 0, 1, 1).data;\n    if (imageData[3] > 0) {\n      return callback.call(thisArg, this.getLayer(), imageData);\n    } else {\n      return undefined;\n    }\n  };\n\n  /**\n   * The transformation matrix to get the pixel on the image for a\n   * pixel on the map.\n   * @param {import(\"../../size.js\").Size} mapSize The map size.\n   * @param {import(\"../../size.js\").Size} imageSize The image size.\n   * @return {import(\"../../transform.js\").Transform} The transformation matrix.\n   * @private\n   */\n  WebGLImageLayerRenderer.prototype.getHitTransformationMatrix_ = function getHitTransformationMatrix_ (mapSize, imageSize) {\n    // the first matrix takes a map pixel, flips the y-axis and scales to\n    // a range between -1 ... 1\n    var mapCoordTransform = createTransform();\n    translateTransform(mapCoordTransform, -1, -1);\n    scaleTransform(mapCoordTransform, 2 / mapSize[0], 2 / mapSize[1]);\n    translateTransform(mapCoordTransform, 0, mapSize[1]);\n    scaleTransform(mapCoordTransform, 1, -1);\n\n    // the second matrix is the inverse of the projection matrix used in the\n    // shader for drawing\n    var projectionMatrixInv = invertTransform(this.projectionMatrix.slice());\n\n    // the third matrix scales to the image dimensions and flips the y-axis again\n    var transform = createTransform();\n    translateTransform(transform, 0, imageSize[1]);\n    scaleTransform(transform, 1, -1);\n    scaleTransform(transform, imageSize[0] / 2, imageSize[1] / 2);\n    translateTransform(transform, 1, 1);\n\n    multiplyTransform(transform, projectionMatrixInv);\n    multiplyTransform(transform, mapCoordTransform);\n\n    return transform;\n  };\n\n  return WebGLImageLayerRenderer;\n}(WebGLLayerRenderer));\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {import(\"../../layer/Layer.js\").default} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nWebGLImageLayerRenderer['handles'] = function(layer) {\n  return layer.getType() === LayerType.IMAGE;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {import(\"../Map.js\").default} mapRenderer The map renderer.\n * @param {import(\"../../layer/Layer.js\").default} layer The layer to be rendererd.\n * @return {WebGLImageLayerRenderer} The layer renderer.\n */\nWebGLImageLayerRenderer['create'] = function(mapRenderer, layer) {\n  return new WebGLImageLayerRenderer(\n    /** @type {import(\"./Map.js\").default} */ (mapRenderer),\n    /** @type {import(\"../../layer/Image.js\").default} */ (layer)\n  );\n};\n\n\nexport default WebGLImageLayerRenderer;\n\n//# sourceMappingURL=ImageLayer.js.map","/**\n * @module ol/renderer/webgl/Map\n */\n\nimport {stableSort} from '../../array.js';\nimport {CLASS_UNSELECTABLE} from '../../css.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {listen} from '../../events.js';\nimport {visibleAtResolution} from '../../layer/Layer.js';\nimport RenderEvent from '../../render/Event.js';\nimport RenderEventType from '../../render/EventType.js';\nimport WebGLImmediateRenderer from '../../render/webgl/Immediate.js';\nimport MapRenderer, {sortByZIndex} from '../Map.js';\nimport SourceState from '../../source/State.js';\nimport LRUCache from '../../structs/LRUCache.js';\nimport PriorityQueue from '../../structs/PriorityQueue.js';\nimport {BLEND, CLAMP_TO_EDGE, COLOR_BUFFER_BIT, CULL_FACE, DEPTH_TEST, FRAMEBUFFER,\n  getContext, LINEAR, ONE, ONE_MINUS_SRC_ALPHA, RGBA, SCISSOR_TEST, SRC_ALPHA,\n  STENCIL_TEST, TEXTURE0, TEXTURE_2D, TEXTURE_MAG_FILTER, TEXTURE_MIN_FILTER,\n  TEXTURE_WRAP_S, TEXTURE_WRAP_T, UNSIGNED_BYTE} from '../../webgl.js';\nimport WebGLContext from '../../webgl/Context.js';\nimport ContextEventType from '../../webgl/ContextEventType.js';\n\n\n/**\n * @typedef {Object} TextureCacheEntry\n * @property {number} magFilter\n * @property {number} minFilter\n * @property {WebGLTexture} texture\n */\n\n\n/**\n * Texture cache high water mark.\n * @type {number}\n */\nvar WEBGL_TEXTURE_CACHE_HIGH_WATER_MARK = 1024;\n\n\n/**\n * @classdesc\n * WebGL map renderer.\n * @api\n */\nvar WebGLMapRenderer = /*@__PURE__*/(function (MapRenderer) {\n  function WebGLMapRenderer(map) {\n    MapRenderer.call(this, map);\n\n    var container = map.getViewport();\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.canvas_ = /** @type {HTMLCanvasElement} */\n      (document.createElement('canvas'));\n    this.canvas_.style.width = '100%';\n    this.canvas_.style.height = '100%';\n    this.canvas_.style.display = 'block';\n    this.canvas_.className = CLASS_UNSELECTABLE;\n    container.insertBefore(this.canvas_, container.childNodes[0] || null);\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.clipTileCanvasWidth_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.clipTileCanvasHeight_ = 0;\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.clipTileContext_ = createCanvasContext2D();\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.renderedVisible_ = true;\n\n    /**\n     * @private\n     * @type {WebGLRenderingContext}\n     */\n    this.gl_ = getContext(this.canvas_, {\n      antialias: true,\n      depth: true,\n      failIfMajorPerformanceCaveat: true,\n      preserveDrawingBuffer: false,\n      stencil: true\n    });\n\n    /**\n     * @private\n     * @type {import(\"../../webgl/Context.js\").default}\n     */\n    this.context_ = new WebGLContext(this.canvas_, this.gl_);\n\n    listen(this.canvas_, ContextEventType.LOST,\n      this.handleWebGLContextLost, this);\n    listen(this.canvas_, ContextEventType.RESTORED,\n      this.handleWebGLContextRestored, this);\n\n    /**\n     * @private\n     * @type {import(\"../../structs/LRUCache.js\").default<TextureCacheEntry|null>}\n     */\n    this.textureCache_ = new LRUCache();\n\n    /**\n     * @private\n     * @type {import(\"../../coordinate.js\").Coordinate}\n     */\n    this.focus_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../structs/PriorityQueue.js\").default<Array>}\n     */\n    this.tileTextureQueue_ = new PriorityQueue(\n      /**\n       * @param {Array<*>} element Element.\n       * @return {number} Priority.\n       * @this {WebGLMapRenderer}\n       */\n      (function(element) {\n        var tileCenter = /** @type {import(\"../../coordinate.js\").Coordinate} */ (element[1]);\n        var tileResolution = /** @type {number} */ (element[2]);\n        var deltaX = tileCenter[0] - this.focus_[0];\n        var deltaY = tileCenter[1] - this.focus_[1];\n        return 65536 * Math.log(tileResolution) +\n              Math.sqrt(deltaX * deltaX + deltaY * deltaY) / tileResolution;\n      }).bind(this),\n      /**\n       * @param {Array<*>} element Element.\n       * @return {string} Key.\n       */\n      function(element) {\n        return (\n          /** @type {import(\"../../Tile.js\").default} */ (element[0]).getKey()\n        );\n      });\n\n\n    /**\n     * @param {import(\"../../PluggableMap.js\").default} map Map.\n     * @param {?import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n     * @return {boolean} false.\n     * @this {WebGLMapRenderer}\n     */\n    this.loadNextTileTexture_ =\n        function(map, frameState) {\n          if (!this.tileTextureQueue_.isEmpty()) {\n            this.tileTextureQueue_.reprioritize();\n            var element = this.tileTextureQueue_.dequeue();\n            var tile = /** @type {import(\"../../Tile.js\").default} */ (element[0]);\n            var tileSize = /** @type {import(\"../../size.js\").Size} */ (element[3]);\n            var tileGutter = /** @type {number} */ (element[4]);\n            this.bindTileTexture(\n              tile, tileSize, tileGutter, LINEAR, LINEAR);\n          }\n          return false;\n        }.bind(this);\n\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textureCacheFrameMarkerCount_ = 0;\n\n    this.initializeGL_();\n  }\n\n  if ( MapRenderer ) WebGLMapRenderer.__proto__ = MapRenderer;\n  WebGLMapRenderer.prototype = Object.create( MapRenderer && MapRenderer.prototype );\n  WebGLMapRenderer.prototype.constructor = WebGLMapRenderer;\n\n  /**\n   * @param {import(\"../../Tile.js\").default} tile Tile.\n   * @param {import(\"../../size.js\").Size} tileSize Tile size.\n   * @param {number} tileGutter Tile gutter.\n   * @param {number} magFilter Mag filter.\n   * @param {number} minFilter Min filter.\n   */\n  WebGLMapRenderer.prototype.bindTileTexture = function bindTileTexture (tile, tileSize, tileGutter, magFilter, minFilter) {\n    var gl = this.getGL();\n    var tileKey = tile.getKey();\n    if (this.textureCache_.containsKey(tileKey)) {\n      var textureCacheEntry = this.textureCache_.get(tileKey);\n      gl.bindTexture(TEXTURE_2D, textureCacheEntry.texture);\n      if (textureCacheEntry.magFilter != magFilter) {\n        gl.texParameteri(\n          TEXTURE_2D, TEXTURE_MAG_FILTER, magFilter);\n        textureCacheEntry.magFilter = magFilter;\n      }\n      if (textureCacheEntry.minFilter != minFilter) {\n        gl.texParameteri(\n          TEXTURE_2D, TEXTURE_MIN_FILTER, minFilter);\n        textureCacheEntry.minFilter = minFilter;\n      }\n    } else {\n      var texture = gl.createTexture();\n      var imageTile = /** @type {import(\"../../ImageTile.js\").default} */ (tile);\n      gl.bindTexture(TEXTURE_2D, texture);\n      if (tileGutter > 0) {\n        var clipTileCanvas = this.clipTileContext_.canvas;\n        var clipTileContext = this.clipTileContext_;\n        if (this.clipTileCanvasWidth_ !== tileSize[0] ||\n            this.clipTileCanvasHeight_ !== tileSize[1]) {\n          clipTileCanvas.width = tileSize[0];\n          clipTileCanvas.height = tileSize[1];\n          this.clipTileCanvasWidth_ = tileSize[0];\n          this.clipTileCanvasHeight_ = tileSize[1];\n        } else {\n          clipTileContext.clearRect(0, 0, tileSize[0], tileSize[1]);\n        }\n        clipTileContext.drawImage(imageTile.getImage(), tileGutter, tileGutter,\n          tileSize[0], tileSize[1], 0, 0, tileSize[0], tileSize[1]);\n        gl.texImage2D(TEXTURE_2D, 0,\n          RGBA, RGBA,\n          UNSIGNED_BYTE, clipTileCanvas);\n      } else {\n        gl.texImage2D(TEXTURE_2D, 0,\n          RGBA, RGBA,\n          UNSIGNED_BYTE, imageTile.getImage());\n      }\n      gl.texParameteri(\n        TEXTURE_2D, TEXTURE_MAG_FILTER, magFilter);\n      gl.texParameteri(\n        TEXTURE_2D, TEXTURE_MIN_FILTER, minFilter);\n      gl.texParameteri(TEXTURE_2D, TEXTURE_WRAP_S,\n        CLAMP_TO_EDGE);\n      gl.texParameteri(TEXTURE_2D, TEXTURE_WRAP_T,\n        CLAMP_TO_EDGE);\n      this.textureCache_.set(tileKey, {\n        texture: texture,\n        magFilter: magFilter,\n        minFilter: minFilter\n      });\n    }\n  };\n\n  /**\n   * @param {import(\"../../render/EventType.js\").default} type Event type.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   */\n  WebGLMapRenderer.prototype.dispatchRenderEvent = function dispatchRenderEvent (type, frameState) {\n    var map = this.getMap();\n    if (map.hasListener(type)) {\n      var context = this.context_;\n\n      var extent = frameState.extent;\n      var size = frameState.size;\n      var viewState = frameState.viewState;\n      var pixelRatio = frameState.pixelRatio;\n\n      var resolution = viewState.resolution;\n      var center = viewState.center;\n      var rotation = viewState.rotation;\n\n      var vectorContext = new WebGLImmediateRenderer(context,\n        center, resolution, rotation, size, extent, pixelRatio);\n      var composeEvent = new RenderEvent(type, vectorContext,\n        frameState, null, context);\n      map.dispatchEvent(composeEvent);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLMapRenderer.prototype.disposeInternal = function disposeInternal () {\n    var gl = this.getGL();\n    if (!gl.isContextLost()) {\n      this.textureCache_.forEach(\n        /**\n         * @param {?TextureCacheEntry} textureCacheEntry\n         *     Texture cache entry.\n         */\n        function(textureCacheEntry) {\n          if (textureCacheEntry) {\n            gl.deleteTexture(textureCacheEntry.texture);\n          }\n        });\n    }\n    this.context_.dispose();\n    MapRenderer.prototype.disposeInternal.call(this);\n  };\n\n  /**\n   * @param {import(\"../../PluggableMap.js\").default} map Map.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @private\n   */\n  WebGLMapRenderer.prototype.expireCache_ = function expireCache_ (map, frameState) {\n    var gl = this.getGL();\n    var textureCacheEntry;\n    while (this.textureCache_.getCount() - this.textureCacheFrameMarkerCount_ >\n        WEBGL_TEXTURE_CACHE_HIGH_WATER_MARK) {\n      textureCacheEntry = this.textureCache_.peekLast();\n      if (!textureCacheEntry) {\n        if (+this.textureCache_.peekLastKey() == frameState.index) {\n          break;\n        } else {\n          --this.textureCacheFrameMarkerCount_;\n        }\n      } else {\n        gl.deleteTexture(textureCacheEntry.texture);\n      }\n      this.textureCache_.pop();\n    }\n  };\n\n  /**\n   * @return {import(\"../../webgl/Context.js\").default} The context.\n   */\n  WebGLMapRenderer.prototype.getContext = function getContext () {\n    return this.context_;\n  };\n\n  /**\n   * @return {WebGLRenderingContext} GL.\n   */\n  WebGLMapRenderer.prototype.getGL = function getGL () {\n    return this.gl_;\n  };\n\n  /**\n   * @return {import(\"../../structs/PriorityQueue.js\").default<Array>} Tile texture queue.\n   */\n  WebGLMapRenderer.prototype.getTileTextureQueue = function getTileTextureQueue () {\n    return this.tileTextureQueue_;\n  };\n\n  /**\n   * @param {import(\"../../events/Event.js\").default} event Event.\n   * @protected\n   */\n  WebGLMapRenderer.prototype.handleWebGLContextLost = function handleWebGLContextLost (event) {\n    event.preventDefault();\n    this.textureCache_.clear();\n    this.textureCacheFrameMarkerCount_ = 0;\n\n    var renderers = this.getLayerRenderers();\n    for (var id in renderers) {\n      var renderer = /** @type {import(\"./Layer.js\").default} */ (renderers[id]);\n      renderer.handleWebGLContextLost();\n    }\n  };\n\n  /**\n   * @protected\n   */\n  WebGLMapRenderer.prototype.handleWebGLContextRestored = function handleWebGLContextRestored () {\n    this.initializeGL_();\n    this.getMap().render();\n  };\n\n  /**\n   * @private\n   */\n  WebGLMapRenderer.prototype.initializeGL_ = function initializeGL_ () {\n    var gl = this.gl_;\n    gl.activeTexture(TEXTURE0);\n    gl.blendFuncSeparate(\n      SRC_ALPHA, ONE_MINUS_SRC_ALPHA,\n      ONE, ONE_MINUS_SRC_ALPHA);\n    gl.disable(CULL_FACE);\n    gl.disable(DEPTH_TEST);\n    gl.disable(SCISSOR_TEST);\n    gl.disable(STENCIL_TEST);\n  };\n\n  /**\n   * @param {import(\"../../Tile.js\").default} tile Tile.\n   * @return {boolean} Is tile texture loaded.\n   */\n  WebGLMapRenderer.prototype.isTileTextureLoaded = function isTileTextureLoaded (tile) {\n    return this.textureCache_.containsKey(tile.getKey());\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLMapRenderer.prototype.renderFrame = function renderFrame (frameState) {\n\n    var context = this.getContext();\n    var gl = this.getGL();\n\n    if (gl.isContextLost()) {\n      return false;\n    }\n\n    if (!frameState) {\n      if (this.renderedVisible_) {\n        this.canvas_.style.display = 'none';\n        this.renderedVisible_ = false;\n      }\n      return false;\n    }\n\n    this.focus_ = frameState.focus;\n\n    this.textureCache_.set((-frameState.index).toString(), null);\n    ++this.textureCacheFrameMarkerCount_;\n\n    this.dispatchRenderEvent(RenderEventType.PRECOMPOSE, frameState);\n\n    /** @type {Array<import(\"../../layer/Layer.js\").State>} */\n    var layerStatesToDraw = [];\n    var layerStatesArray = frameState.layerStatesArray;\n    stableSort(layerStatesArray, sortByZIndex);\n\n    var viewResolution = frameState.viewState.resolution;\n    var i, ii;\n    for (i = 0, ii = layerStatesArray.length; i < ii; ++i) {\n      var layerState = layerStatesArray[i];\n      if (visibleAtResolution(layerState, viewResolution) &&\n          layerState.sourceState == SourceState.READY) {\n        var layerRenderer = /** @type {import(\"./Layer.js\").default} */ (this.getLayerRenderer(layerState.layer));\n        if (layerRenderer.prepareFrame(frameState, layerState, context)) {\n          layerStatesToDraw.push(layerState);\n        }\n      }\n    }\n\n    var width = frameState.size[0] * frameState.pixelRatio;\n    var height = frameState.size[1] * frameState.pixelRatio;\n    if (this.canvas_.width != width || this.canvas_.height != height) {\n      this.canvas_.width = width;\n      this.canvas_.height = height;\n    }\n\n    gl.bindFramebuffer(FRAMEBUFFER, null);\n\n    gl.clearColor(0, 0, 0, 0);\n    gl.clear(COLOR_BUFFER_BIT);\n    gl.enable(BLEND);\n    gl.viewport(0, 0, this.canvas_.width, this.canvas_.height);\n\n    for (i = 0, ii = layerStatesToDraw.length; i < ii; ++i) {\n      var layerState$1 = layerStatesToDraw[i];\n      var layerRenderer$1 = /** @type {import(\"./Layer.js\").default} */ (this.getLayerRenderer(layerState$1.layer));\n      layerRenderer$1.composeFrame(frameState, layerState$1, context);\n    }\n\n    if (!this.renderedVisible_) {\n      this.canvas_.style.display = '';\n      this.renderedVisible_ = true;\n    }\n\n    this.calculateMatrices2D(frameState);\n\n    if (this.textureCache_.getCount() - this.textureCacheFrameMarkerCount_ >\n        WEBGL_TEXTURE_CACHE_HIGH_WATER_MARK) {\n      frameState.postRenderFunctions.push(\n        /** @type {import(\"../../PluggableMap.js\").PostRenderFunction} */ (this.expireCache_.bind(this))\n      );\n    }\n\n    if (!this.tileTextureQueue_.isEmpty()) {\n      frameState.postRenderFunctions.push(this.loadNextTileTexture_);\n      frameState.animate = true;\n    }\n\n    this.dispatchRenderEvent(RenderEventType.POSTCOMPOSE, frameState);\n\n    this.scheduleRemoveUnusedLayerRenderers(frameState);\n    this.scheduleExpireIconCache(frameState);\n\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLMapRenderer.prototype.forEachFeatureAtCoordinate = function forEachFeatureAtCoordinate (\n    coordinate,\n    frameState,\n    hitTolerance,\n    callback,\n    thisArg,\n    layerFilter,\n    thisArg2\n  ) {\n    var result;\n\n    if (this.getGL().isContextLost()) {\n      return false;\n    }\n\n    var viewState = frameState.viewState;\n\n    var layerStates = frameState.layerStatesArray;\n    var numLayers = layerStates.length;\n    var i;\n    for (i = numLayers - 1; i >= 0; --i) {\n      var layerState = layerStates[i];\n      var layer = layerState.layer;\n      if (visibleAtResolution(layerState, viewState.resolution) &&\n          layerFilter.call(thisArg2, layer)) {\n        var layerRenderer = this.getLayerRenderer(layer);\n        result = layerRenderer.forEachFeatureAtCoordinate(\n          coordinate, frameState, hitTolerance, callback);\n        if (result) {\n          return result;\n        }\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLMapRenderer.prototype.hasFeatureAtCoordinate = function hasFeatureAtCoordinate (coordinate, frameState, hitTolerance, layerFilter, thisArg) {\n    var hasFeature = false;\n\n    if (this.getGL().isContextLost()) {\n      return false;\n    }\n\n    var viewState = frameState.viewState;\n\n    var layerStates = frameState.layerStatesArray;\n    var numLayers = layerStates.length;\n    var i;\n    for (i = numLayers - 1; i >= 0; --i) {\n      var layerState = layerStates[i];\n      var layer = layerState.layer;\n      if (visibleAtResolution(layerState, viewState.resolution) &&\n          layerFilter.call(thisArg, layer)) {\n        var layerRenderer = this.getLayerRenderer(layer);\n        hasFeature =\n            layerRenderer.hasFeatureAtCoordinate(coordinate, frameState);\n        if (hasFeature) {\n          return true;\n        }\n      }\n    }\n    return hasFeature;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLMapRenderer.prototype.forEachLayerAtPixel = function forEachLayerAtPixel (pixel, frameState, hitTolerance, callback, thisArg, layerFilter, thisArg2) {\n    if (this.getGL().isContextLost()) {\n      return false;\n    }\n\n    var viewState = frameState.viewState;\n    var result;\n\n    var layerStates = frameState.layerStatesArray;\n    var numLayers = layerStates.length;\n    var i;\n    for (i = numLayers - 1; i >= 0; --i) {\n      var layerState = layerStates[i];\n      var layer = layerState.layer;\n      if (visibleAtResolution(layerState, viewState.resolution) &&\n          layerFilter.call(thisArg, layer)) {\n        var layerRenderer = /** @type {import(\"./Layer.js\").default} */ (this.getLayerRenderer(layer));\n        result = layerRenderer.forEachLayerAtPixel(\n          pixel, frameState, callback, thisArg);\n        if (result) {\n          return result;\n        }\n      }\n    }\n    return undefined;\n  };\n\n  return WebGLMapRenderer;\n}(MapRenderer));\n\n\nexport default WebGLMapRenderer;\n\n//# sourceMappingURL=Map.js.map","/**\n * @module ol/Tile\n */\nimport TileState from './TileState.js';\nimport {easeIn} from './easing.js';\nimport EventTarget from './events/Target.js';\nimport EventType from './events/EventType.js';\n\n\n/**\n * A function that takes an {@link module:ol/Tile} for the tile and a\n * `{string}` for the url as arguments. The default is\n * ```js\n * source.setTileLoadFunction(function(tile, src) {\n *   tile.getImage().src = src;\n * });\n * ```\n * For more fine grained control, the load function can use fetch or XMLHttpRequest and involve\n * error handling:\n *\n * ```js\n * import TileState from 'ol/TileState';\n *\n * source.setTileLoadFunction(function(tile, src) {\n *   var xhr = new XMLHttpRequest();\n *   xhr.responseType = 'blob';\n *   xhr.addEventListener('loadend', function (evt) {\n *     var data = this.response;\n *     if (data !== undefined) {\n *       tile.getImage().src = URL.createObjectURL(data);\n *     } else {\n *       tile.setState(TileState.ERROR);\n *     }\n *   });\n *   xhr.addEventListener('error', function () {\n *     tile.setState(TileState.ERROR);\n *   });\n *   xhr.open('GET', src);\n *   xhr.send();\n * });\n * ```\n *\n * @typedef {function(Tile, string)} LoadFunction\n * @api\n */\n\n/**\n * {@link module:ol/source/Tile~Tile} sources use a function of this type to get\n * the url that provides a tile for a given tile coordinate.\n *\n * This function takes an {@link module:ol/tilecoord~TileCoord} for the tile\n * coordinate, a `{number}` representing the pixel ratio and a\n * {@link module:ol/proj/Projection} for the projection  as arguments\n * and returns a `{string}` representing the tile URL, or undefined if no tile\n * should be requested for the passed tile coordinate.\n *\n * @typedef {function(import(\"./tilecoord.js\").TileCoord, number,\n *           import(\"./proj/Projection.js\").default): (string|undefined)} UrlFunction\n * @api\n */\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [transition=250] A duration for tile opacity\n * transitions in milliseconds. A duration of 0 disables the opacity transition.\n * @api\n */\n\n\n/**\n * @classdesc\n * Base class for tiles.\n *\n * @abstract\n */\nvar Tile = /*@__PURE__*/(function (EventTarget) {\n  function Tile(tileCoord, state, opt_options) {\n    EventTarget.call(this);\n\n    var options = opt_options ? opt_options : {};\n\n    /**\n     * @type {import(\"./tilecoord.js\").TileCoord}\n     */\n    this.tileCoord = tileCoord;\n\n    /**\n     * @protected\n     * @type {TileState}\n     */\n    this.state = state;\n\n    /**\n     * An \"interim\" tile for this tile. The interim tile may be used while this\n     * one is loading, for \"smooth\" transitions when changing params/dimensions\n     * on the source.\n     * @type {Tile}\n     */\n    this.interimTile = null;\n\n    /**\n     * A key assigned to the tile. This is used by the tile source to determine\n     * if this tile can effectively be used, or if a new tile should be created\n     * and this one be used as an interim tile for this new tile.\n     * @type {string}\n     */\n    this.key = '';\n\n    /**\n     * The duration for the opacity transition.\n     * @type {number}\n     */\n    this.transition_ = options.transition === undefined ? 250 : options.transition;\n\n    /**\n     * Lookup of start times for rendering transitions.  If the start time is\n     * equal to -1, the transition is complete.\n     * @type {Object<string, number>}\n     */\n    this.transitionStarts_ = {};\n\n  }\n\n  if ( EventTarget ) Tile.__proto__ = EventTarget;\n  Tile.prototype = Object.create( EventTarget && EventTarget.prototype );\n  Tile.prototype.constructor = Tile;\n\n  /**\n   * @protected\n   */\n  Tile.prototype.changed = function changed () {\n    this.dispatchEvent(EventType.CHANGE);\n  };\n\n  /**\n   * @return {string} Key.\n   */\n  Tile.prototype.getKey = function getKey () {\n    return this.key + '/' + this.tileCoord;\n  };\n\n  /**\n   * Get the interim tile most suitable for rendering using the chain of interim\n   * tiles. This corresponds to the  most recent tile that has been loaded, if no\n   * such tile exists, the original tile is returned.\n   * @return {!Tile} Best tile for rendering.\n   */\n  Tile.prototype.getInterimTile = function getInterimTile () {\n    if (!this.interimTile) {\n      //empty chain\n      return this;\n    }\n    var tile = this.interimTile;\n\n    // find the first loaded tile and return it. Since the chain is sorted in\n    // decreasing order of creation time, there is no need to search the remainder\n    // of the list (all those tiles correspond to older requests and will be\n    // cleaned up by refreshInterimChain)\n    do {\n      if (tile.getState() == TileState.LOADED) {\n        return tile;\n      }\n      tile = tile.interimTile;\n    } while (tile);\n\n    // we can not find a better tile\n    return this;\n  };\n\n  /**\n   * Goes through the chain of interim tiles and discards sections of the chain\n   * that are no longer relevant.\n   */\n  Tile.prototype.refreshInterimChain = function refreshInterimChain () {\n    if (!this.interimTile) {\n      return;\n    }\n\n    var tile = this.interimTile;\n    var prev = /** @type {Tile} */ (this);\n\n    do {\n      if (tile.getState() == TileState.LOADED) {\n        //we have a loaded tile, we can discard the rest of the list\n        //we would could abort any LOADING tile request\n        //older than this tile (i.e. any LOADING tile following this entry in the chain)\n        tile.interimTile = null;\n        break;\n      } else if (tile.getState() == TileState.LOADING) {\n        //keep this LOADING tile any loaded tiles later in the chain are\n        //older than this tile, so we're still interested in the request\n        prev = tile;\n      } else if (tile.getState() == TileState.IDLE) {\n        //the head of the list is the most current tile, we don't need\n        //to start any other requests for this chain\n        prev.interimTile = tile.interimTile;\n      } else {\n        prev = tile;\n      }\n      tile = prev.interimTile;\n    } while (tile);\n  };\n\n  /**\n   * Get the tile coordinate for this tile.\n   * @return {import(\"./tilecoord.js\").TileCoord} The tile coordinate.\n   * @api\n   */\n  Tile.prototype.getTileCoord = function getTileCoord () {\n    return this.tileCoord;\n  };\n\n  /**\n   * @return {TileState} State.\n   */\n  Tile.prototype.getState = function getState () {\n    return this.state;\n  };\n\n  /**\n   * Sets the state of this tile. If you write your own {@link module:ol/Tile~LoadFunction tileLoadFunction} ,\n   * it is important to set the state correctly to {@link module:ol/TileState~ERROR}\n   * when the tile cannot be loaded. Otherwise the tile cannot be removed from\n   * the tile queue and will block other requests.\n   * @param {TileState} state State.\n   * @api\n   */\n  Tile.prototype.setState = function setState (state) {\n    this.state = state;\n    this.changed();\n  };\n\n  /**\n   * Load the image or retry if loading previously failed.\n   * Loading is taken care of by the tile queue, and calling this method is\n   * only needed for preloading or for reloading in case of an error.\n   * @abstract\n   * @api\n   */\n  Tile.prototype.load = function load () {};\n\n  /**\n   * Get the alpha value for rendering.\n   * @param {string} id An id for the renderer.\n   * @param {number} time The render frame time.\n   * @return {number} A number between 0 and 1.\n   */\n  Tile.prototype.getAlpha = function getAlpha (id, time) {\n    if (!this.transition_) {\n      return 1;\n    }\n\n    var start = this.transitionStarts_[id];\n    if (!start) {\n      start = time;\n      this.transitionStarts_[id] = start;\n    } else if (start === -1) {\n      return 1;\n    }\n\n    var delta = time - start + (1000 / 60); // avoid rendering at 0\n    if (delta >= this.transition_) {\n      return 1;\n    }\n    return easeIn(delta / this.transition_);\n  };\n\n  /**\n   * Determine if a tile is in an alpha transition.  A tile is considered in\n   * transition if tile.getAlpha() has not yet been called or has been called\n   * and returned 1.\n   * @param {string} id An id for the renderer.\n   * @return {boolean} The tile is in transition.\n   */\n  Tile.prototype.inTransition = function inTransition (id) {\n    if (!this.transition_) {\n      return false;\n    }\n    return this.transitionStarts_[id] !== -1;\n  };\n\n  /**\n   * Mark a transition as complete.\n   * @param {string} id An id for the renderer.\n   */\n  Tile.prototype.endTransition = function endTransition (id) {\n    if (this.transition_) {\n      this.transitionStarts_[id] = -1;\n    }\n  };\n\n  return Tile;\n}(EventTarget));\n\n\nexport default Tile;\n\n//# sourceMappingURL=Tile.js.map","/**\n * @module ol/ImageTile\n */\nimport Tile from './Tile.js';\nimport TileState from './TileState.js';\nimport {createCanvasContext2D} from './dom.js';\nimport {listenOnce, unlistenByKey} from './events.js';\nimport EventType from './events/EventType.js';\n\n\nvar ImageTile = /*@__PURE__*/(function (Tile) {\n  function ImageTile(tileCoord, state, src, crossOrigin, tileLoadFunction, opt_options) {\n\n    Tile.call(this, tileCoord, state, opt_options);\n\n    /**\n     * @private\n     * @type {?string}\n     */\n    this.crossOrigin_ = crossOrigin;\n\n    /**\n     * Image URI\n     *\n     * @private\n     * @type {string}\n     */\n    this.src_ = src;\n\n    /**\n     * @private\n     * @type {HTMLImageElement|HTMLCanvasElement}\n     */\n    this.image_ = new Image();\n    if (crossOrigin !== null) {\n      this.image_.crossOrigin = crossOrigin;\n    }\n\n    /**\n     * @private\n     * @type {Array<import(\"./events.js\").EventsKey>}\n     */\n    this.imageListenerKeys_ = null;\n\n    /**\n     * @private\n     * @type {import(\"./Tile.js\").LoadFunction}\n     */\n    this.tileLoadFunction_ = tileLoadFunction;\n\n  }\n\n  if ( Tile ) ImageTile.__proto__ = Tile;\n  ImageTile.prototype = Object.create( Tile && Tile.prototype );\n  ImageTile.prototype.constructor = ImageTile;\n\n  /**\n   * @inheritDoc\n   */\n  ImageTile.prototype.disposeInternal = function disposeInternal () {\n    if (this.state == TileState.LOADING) {\n      this.unlistenImage_();\n      this.image_ = getBlankImage();\n    }\n    if (this.interimTile) {\n      this.interimTile.dispose();\n    }\n    this.state = TileState.ABORT;\n    this.changed();\n    Tile.prototype.disposeInternal.call(this);\n  };\n\n  /**\n   * Get the HTML image element for this tile (may be a Canvas, Image, or Video).\n   * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.\n   * @api\n   */\n  ImageTile.prototype.getImage = function getImage () {\n    return this.image_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  ImageTile.prototype.getKey = function getKey () {\n    return this.src_;\n  };\n\n  /**\n   * Tracks loading or read errors.\n   *\n   * @private\n   */\n  ImageTile.prototype.handleImageError_ = function handleImageError_ () {\n    this.state = TileState.ERROR;\n    this.unlistenImage_();\n    this.image_ = getBlankImage();\n    this.changed();\n  };\n\n  /**\n   * Tracks successful image load.\n   *\n   * @private\n   */\n  ImageTile.prototype.handleImageLoad_ = function handleImageLoad_ () {\n    var image = /** @type {HTMLImageElement} */ (this.image_);\n    if (image.naturalWidth && image.naturalHeight) {\n      this.state = TileState.LOADED;\n    } else {\n      this.state = TileState.EMPTY;\n    }\n    this.unlistenImage_();\n    this.changed();\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  ImageTile.prototype.load = function load () {\n    if (this.state == TileState.ERROR) {\n      this.state = TileState.IDLE;\n      this.image_ = new Image();\n      if (this.crossOrigin_ !== null) {\n        this.image_.crossOrigin = this.crossOrigin_;\n      }\n    }\n    if (this.state == TileState.IDLE) {\n      this.state = TileState.LOADING;\n      this.changed();\n      this.imageListenerKeys_ = [\n        listenOnce(this.image_, EventType.ERROR,\n          this.handleImageError_, this),\n        listenOnce(this.image_, EventType.LOAD,\n          this.handleImageLoad_, this)\n      ];\n      this.tileLoadFunction_(this, this.src_);\n    }\n  };\n\n  /**\n   * Discards event handlers which listen for load completion or errors.\n   *\n   * @private\n   */\n  ImageTile.prototype.unlistenImage_ = function unlistenImage_ () {\n    this.imageListenerKeys_.forEach(unlistenByKey);\n    this.imageListenerKeys_ = null;\n  };\n\n  return ImageTile;\n}(Tile));\n\n\n/**\n * Get a 1-pixel blank image.\n * @return {HTMLCanvasElement} Blank image.\n */\nfunction getBlankImage() {\n  var ctx = createCanvasContext2D(1, 1);\n  ctx.fillStyle = 'rgba(0,0,0,0)';\n  ctx.fillRect(0, 0, 1, 1);\n  return ctx.canvas;\n}\n\nexport default ImageTile;\n\n//# sourceMappingURL=ImageTile.js.map","/**\n * @module ol/tilecoord\n */\n\n\n/**\n * An array of three numbers representing the location of a tile in a tile\n * grid. The order is `z`, `x`, and `y`. `z` is the zoom level.\n * @typedef {Array<number>} TileCoord\n * @api\n */\n\n\n/**\n * @param {number} z Z.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {TileCoord=} opt_tileCoord Tile coordinate.\n * @return {TileCoord} Tile coordinate.\n */\nexport function createOrUpdate(z, x, y, opt_tileCoord) {\n  if (opt_tileCoord !== undefined) {\n    opt_tileCoord[0] = z;\n    opt_tileCoord[1] = x;\n    opt_tileCoord[2] = y;\n    return opt_tileCoord;\n  } else {\n    return [z, x, y];\n  }\n}\n\n\n/**\n * @param {number} z Z.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {string} Key.\n */\nexport function getKeyZXY(z, x, y) {\n  return z + '/' + x + '/' + y;\n}\n\n\n/**\n * Get the key for a tile coord.\n * @param {TileCoord} tileCoord The tile coord.\n * @return {string} Key.\n */\nexport function getKey(tileCoord) {\n  return getKeyZXY(tileCoord[0], tileCoord[1], tileCoord[2]);\n}\n\n\n/**\n * Get a tile coord given a key.\n * @param {string} key The tile coord key.\n * @return {TileCoord} The tile coord.\n */\nexport function fromKey(key) {\n  return key.split('/').map(Number);\n}\n\n\n/**\n * @param {TileCoord} tileCoord Tile coord.\n * @return {number} Hash.\n */\nexport function hash(tileCoord) {\n  return (tileCoord[1] << tileCoord[0]) + tileCoord[2];\n}\n\n\n/**\n * @param {TileCoord} tileCoord Tile coord.\n * @return {string} Quad key.\n */\nexport function quadKey(tileCoord) {\n  var z = tileCoord[0];\n  var digits = new Array(z);\n  var mask = 1 << (z - 1);\n  var i, charCode;\n  for (i = 0; i < z; ++i) {\n    // 48 is charCode for 0 - '0'.charCodeAt(0)\n    charCode = 48;\n    if (tileCoord[1] & mask) {\n      charCode += 1;\n    }\n    if (tileCoord[2] & mask) {\n      charCode += 2;\n    }\n    digits[i] = String.fromCharCode(charCode);\n    mask >>= 1;\n  }\n  return digits.join('');\n}\n\n\n/**\n * @param {TileCoord} tileCoord Tile coordinate.\n * @param {!import(\"./tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n * @return {boolean} Tile coordinate is within extent and zoom level range.\n */\nexport function withinExtentAndZ(tileCoord, tileGrid) {\n  var z = tileCoord[0];\n  var x = tileCoord[1];\n  var y = tileCoord[2];\n\n  if (tileGrid.getMinZoom() > z || z > tileGrid.getMaxZoom()) {\n    return false;\n  }\n  var extent = tileGrid.getExtent();\n  var tileRange;\n  if (!extent) {\n    tileRange = tileGrid.getFullTileRange(z);\n  } else {\n    tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z);\n  }\n  if (!tileRange) {\n    return true;\n  } else {\n    return tileRange.containsXY(x, y);\n  }\n}\n\n//# sourceMappingURL=tilecoord.js.map","/**\n * @module ol/TileCache\n */\nimport LRUCache from './structs/LRUCache.js';\nimport {fromKey, getKey} from './tilecoord.js';\n\nvar TileCache = /*@__PURE__*/(function (LRUCache) {\n  function TileCache(opt_highWaterMark) {\n\n    LRUCache.call(this, opt_highWaterMark);\n\n  }\n\n  if ( LRUCache ) TileCache.__proto__ = LRUCache;\n  TileCache.prototype = Object.create( LRUCache && LRUCache.prototype );\n  TileCache.prototype.constructor = TileCache;\n\n  /**\n   * @param {!Object<string, import(\"./TileRange.js\").default>} usedTiles Used tiles.\n   */\n  TileCache.prototype.expireCache = function expireCache (usedTiles) {\n    while (this.canExpireCache()) {\n      var tile = this.peekLast();\n      var zKey = tile.tileCoord[0].toString();\n      if (zKey in usedTiles && usedTiles[zKey].contains(tile.tileCoord)) {\n        break;\n      } else {\n        this.pop().dispose();\n      }\n    }\n  };\n\n  /**\n   * Prune all tiles from the cache that don't have the same z as the newest tile.\n   */\n  TileCache.prototype.pruneExceptNewestZ = function pruneExceptNewestZ () {\n    if (this.getCount() === 0) {\n      return;\n    }\n    var key = this.peekFirstKey();\n    var tileCoord = fromKey(key);\n    var z = tileCoord[0];\n    this.forEach(function(tile) {\n      if (tile.tileCoord[0] !== z) {\n        this.remove(getKey(tile.tileCoord));\n        tile.dispose();\n      }\n    }, this);\n  };\n\n  return TileCache;\n}(LRUCache));\n\n\nexport default TileCache;\n\n//# sourceMappingURL=TileCache.js.map","/**\n * @module ol/source/Source\n */\nimport {abstract} from '../util.js';\nimport BaseObject from '../Object.js';\nimport {get as getProjection} from '../proj.js';\nimport SourceState from './State.js';\n\n\n/**\n * A function that returns a string or an array of strings representing source\n * attributions.\n *\n * @typedef {function(import(\"../PluggableMap.js\").FrameState): (string|Array<string>)} Attribution\n */\n\n\n/**\n * A type that can be used to provide attribution information for data sources.\n *\n * It represents either\n * * a simple string (e.g. `'© Acme Inc.'`)\n * * an array of simple strings (e.g. `['© Acme Inc.', '© Bacme Inc.']`)\n * * a function that returns a string or array of strings (`{@link module:ol/source/Source~Attribution}`)\n *\n * @typedef {string|Array<string>|Attribution} AttributionLike\n */\n\n\n/**\n * @typedef {Object} Options\n * @property {AttributionLike} [attributions]\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {import(\"../proj.js\").ProjectionLike} projection\n * @property {SourceState} [state='ready']\n * @property {boolean} [wrapX=false]\n */\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for {@link module:ol/layer/Layer~Layer} sources.\n *\n * A generic `change` event is triggered when the state of the source changes.\n * @abstract\n * @api\n */\nvar Source = /*@__PURE__*/(function (BaseObject) {\n  function Source(options) {\n\n    BaseObject.call(this);\n\n    /**\n     * @private\n     * @type {import(\"../proj/Projection.js\").default}\n     */\n    this.projection_ = getProjection(options.projection);\n\n    /**\n     * @private\n     * @type {?Attribution}\n     */\n    this.attributions_ = adaptAttributions(options.attributions);\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.attributionsCollapsible_ = options.attributionsCollapsible !== undefined ?\n      options.attributionsCollapsible : true;\n\n    /**\n     * This source is currently loading data. Sources that defer loading to the\n     * map's tile queue never set this to `true`.\n     * @type {boolean}\n     */\n    this.loading = false;\n\n    /**\n     * @private\n     * @type {SourceState}\n     */\n    this.state_ = options.state !== undefined ?\n      options.state : SourceState.READY;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.wrapX_ = options.wrapX !== undefined ? options.wrapX : false;\n\n  }\n\n  if ( BaseObject ) Source.__proto__ = BaseObject;\n  Source.prototype = Object.create( BaseObject && BaseObject.prototype );\n  Source.prototype.constructor = Source;\n\n  /**\n   * Get the attribution function for the source.\n   * @return {?Attribution} Attribution function.\n   */\n  Source.prototype.getAttributions = function getAttributions () {\n    return this.attributions_;\n  };\n\n  /**\n   * @return {boolean} Aattributions are collapsible.\n   */\n  Source.prototype.getAttributionsCollapsible = function getAttributionsCollapsible () {\n    return this.attributionsCollapsible_;\n  };\n\n  /**\n   * Get the projection of the source.\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   * @api\n   */\n  Source.prototype.getProjection = function getProjection () {\n    return this.projection_;\n  };\n\n  /**\n   * @abstract\n   * @return {Array<number>|undefined} Resolutions.\n   */\n  Source.prototype.getResolutions = function getResolutions () {\n    return abstract();\n  };\n\n  /**\n   * Get the state of the source, see {@link module:ol/source/State~State} for possible states.\n   * @return {SourceState} State.\n   * @api\n   */\n  Source.prototype.getState = function getState () {\n    return this.state_;\n  };\n\n  /**\n   * @return {boolean|undefined} Wrap X.\n   */\n  Source.prototype.getWrapX = function getWrapX () {\n    return this.wrapX_;\n  };\n\n  /**\n   * Refreshes the source and finally dispatches a 'change' event.\n   * @api\n   */\n  Source.prototype.refresh = function refresh () {\n    this.changed();\n  };\n\n  /**\n   * Set the attributions of the source.\n   * @param {AttributionLike|undefined} attributions Attributions.\n   *     Can be passed as `string`, `Array<string>`, `{@link module:ol/source/Source~Attribution}`,\n   *     or `undefined`.\n   * @api\n   */\n  Source.prototype.setAttributions = function setAttributions (attributions) {\n    this.attributions_ = adaptAttributions(attributions);\n    this.changed();\n  };\n\n  /**\n   * Set the state of the source.\n   * @param {SourceState} state State.\n   * @protected\n   */\n  Source.prototype.setState = function setState (state) {\n    this.state_ = state;\n    this.changed();\n  };\n\n  return Source;\n}(BaseObject));\n\n\n/**\n * Turns the attributions option into an attributions function.\n * @param {AttributionLike|undefined} attributionLike The attribution option.\n * @return {?Attribution} An attribution function (or null).\n */\nfunction adaptAttributions(attributionLike) {\n  if (!attributionLike) {\n    return null;\n  }\n  if (Array.isArray(attributionLike)) {\n    return function(frameState) {\n      return attributionLike;\n    };\n  }\n\n  if (typeof attributionLike === 'function') {\n    return attributionLike;\n  }\n\n  return function(frameState) {\n    return [attributionLike];\n  };\n}\n\n\nexport default Source;\n\n//# sourceMappingURL=Source.js.map","/**\n * @module ol/tilegrid/TileGrid\n */\nimport {DEFAULT_TILE_SIZE} from './common.js';\nimport {assert} from '../asserts.js';\nimport TileRange, {createOrUpdate as createOrUpdateTileRange} from '../TileRange.js';\nimport {isSorted, linearFindNearest} from '../array.js';\nimport {createOrUpdate, getTopLeft} from '../extent.js';\nimport {clamp} from '../math.js';\nimport {toSize} from '../size.js';\nimport {createOrUpdate as createOrUpdateTileCoord} from '../tilecoord.js';\n\n\n/**\n * @private\n * @type {import(\"../tilecoord.js\").TileCoord}\n */\nvar tmpTileCoord = [0, 0, 0];\n\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../extent.js\").Extent} [extent] Extent for the tile grid. No tiles outside this\n * extent will be requested by {@link module:ol/source/Tile} sources. When no `origin` or\n * `origins` are configured, the `origin` will be set to the top-left corner of the extent.\n * @property {number} [minZoom=0] Minimum zoom.\n * @property {import(\"../coordinate.js\").Coordinate} [origin] The tile grid origin, i.e. where the `x`\n * and `y` axes meet (`[z, 0, 0]`). Tile coordinates increase left to right and upwards. If not\n * specified, `extent` or `origins` must be provided.\n * @property {Array<import(\"../coordinate.js\").Coordinate>} [origins] Tile grid origins, i.e. where\n * the `x` and `y` axes meet (`[z, 0, 0]`), for each zoom level. If given, the array length\n * should match the length of the `resolutions` array, i.e. each resolution can have a different\n * origin. Tile coordinates increase left to right and upwards. If not specified, `extent` or\n * `origin` must be provided.\n * @property {!Array<number>} resolutions Resolutions. The array index of each resolution needs\n * to match the zoom level. This means that even if a `minZoom` is configured, the resolutions\n * array will have a length of `maxZoom + 1`.\n * @property {Array<import(\"../size.js\").Size>} [sizes] Sizes.\n * @property {number|import(\"../size.js\").Size} [tileSize] Tile size.\n * Default is `[256, 256]`.\n * @property {Array<import(\"../size.js\").Size>} [tileSizes] Tile sizes. If given, the array length\n * should match the length of the `resolutions` array, i.e. each resolution can have a different\n * tile size.\n */\n\n\n/**\n * @classdesc\n * Base class for setting the grid pattern for sources accessing tiled-image\n * servers.\n * @api\n */\nvar TileGrid = function TileGrid(options) {\n\n  /**\n   * @protected\n   * @type {number}\n   */\n  this.minZoom = options.minZoom !== undefined ? options.minZoom : 0;\n\n  /**\n   * @private\n   * @type {!Array<number>}\n   */\n  this.resolutions_ = options.resolutions;\n  assert(isSorted(this.resolutions_, function(a, b) {\n    return b - a;\n  }, true), 17); // `resolutions` must be sorted in descending order\n\n\n  // check if we've got a consistent zoom factor and origin\n  var zoomFactor;\n  if (!options.origins) {\n    for (var i = 0, ii = this.resolutions_.length - 1; i < ii; ++i) {\n      if (!zoomFactor) {\n        zoomFactor = this.resolutions_[i] / this.resolutions_[i + 1];\n      } else {\n        if (this.resolutions_[i] / this.resolutions_[i + 1] !== zoomFactor) {\n          zoomFactor = undefined;\n          break;\n        }\n      }\n    }\n  }\n\n\n  /**\n   * @private\n   * @type {number|undefined}\n   */\n  this.zoomFactor_ = zoomFactor;\n\n\n  /**\n   * @protected\n   * @type {number}\n   */\n  this.maxZoom = this.resolutions_.length - 1;\n\n  /**\n   * @private\n   * @type {import(\"../coordinate.js\").Coordinate}\n   */\n  this.origin_ = options.origin !== undefined ? options.origin : null;\n\n  /**\n   * @private\n   * @type {Array<import(\"../coordinate.js\").Coordinate>}\n   */\n  this.origins_ = null;\n  if (options.origins !== undefined) {\n    this.origins_ = options.origins;\n    assert(this.origins_.length == this.resolutions_.length,\n      20); // Number of `origins` and `resolutions` must be equal\n  }\n\n  var extent = options.extent;\n\n  if (extent !== undefined &&\n      !this.origin_ && !this.origins_) {\n    this.origin_ = getTopLeft(extent);\n  }\n\n  assert(\n    (!this.origin_ && this.origins_) || (this.origin_ && !this.origins_),\n    18); // Either `origin` or `origins` must be configured, never both\n\n  /**\n   * @private\n   * @type {Array<number|import(\"../size.js\").Size>}\n   */\n  this.tileSizes_ = null;\n  if (options.tileSizes !== undefined) {\n    this.tileSizes_ = options.tileSizes;\n    assert(this.tileSizes_.length == this.resolutions_.length,\n      19); // Number of `tileSizes` and `resolutions` must be equal\n  }\n\n  /**\n   * @private\n   * @type {number|import(\"../size.js\").Size}\n   */\n  this.tileSize_ = options.tileSize !== undefined ?\n    options.tileSize :\n    !this.tileSizes_ ? DEFAULT_TILE_SIZE : null;\n  assert(\n    (!this.tileSize_ && this.tileSizes_) ||\n      (this.tileSize_ && !this.tileSizes_),\n    22); // Either `tileSize` or `tileSizes` must be configured, never both\n\n  /**\n   * @private\n   * @type {import(\"../extent.js\").Extent}\n   */\n  this.extent_ = extent !== undefined ? extent : null;\n\n\n  /**\n   * @private\n   * @type {Array<import(\"../TileRange.js\").default>}\n   */\n  this.fullTileRanges_ = null;\n\n  /**\n   * @private\n   * @type {import(\"../size.js\").Size}\n   */\n  this.tmpSize_ = [0, 0];\n\n  if (options.sizes !== undefined) {\n    this.fullTileRanges_ = options.sizes.map(function(size, z) {\n      var tileRange = new TileRange(\n        Math.min(0, size[0]), Math.max(size[0] - 1, -1),\n        Math.min(0, size[1]), Math.max(size[1] - 1, -1));\n      return tileRange;\n    }, this);\n  } else if (extent) {\n    this.calculateTileRanges_(extent);\n  }\n\n};\n\n/**\n * Call a function with each tile coordinate for a given extent and zoom level.\n *\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {number} zoom Integer zoom level.\n * @param {function(import(\"../tilecoord.js\").TileCoord)} callback Function called with each tile coordinate.\n * @api\n */\nTileGrid.prototype.forEachTileCoord = function forEachTileCoord (extent, zoom, callback) {\n  var tileRange = this.getTileRangeForExtentAndZ(extent, zoom);\n  for (var i = tileRange.minX, ii = tileRange.maxX; i <= ii; ++i) {\n    for (var j = tileRange.minY, jj = tileRange.maxY; j <= jj; ++j) {\n      callback([zoom, i, j]);\n    }\n  }\n};\n\n/**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {function(this: T, number, import(\"../TileRange.js\").default): boolean} callback Callback.\n * @param {T=} opt_this The object to use as `this` in `callback`.\n * @param {import(\"../TileRange.js\").default=} opt_tileRange Temporary import(\"../TileRange.js\").default object.\n * @param {import(\"../extent.js\").Extent=} opt_extent Temporary import(\"../extent.js\").Extent object.\n * @return {boolean} Callback succeeded.\n * @template T\n */\nTileGrid.prototype.forEachTileCoordParentTileRange = function forEachTileCoordParentTileRange (tileCoord, callback, opt_this, opt_tileRange, opt_extent) {\n  var tileRange, x, y;\n  var tileCoordExtent = null;\n  var z = tileCoord[0] - 1;\n  if (this.zoomFactor_ === 2) {\n    x = tileCoord[1];\n    y = tileCoord[2];\n  } else {\n    tileCoordExtent = this.getTileCoordExtent(tileCoord, opt_extent);\n  }\n  while (z >= this.minZoom) {\n    if (this.zoomFactor_ === 2) {\n      x = Math.floor(x / 2);\n      y = Math.floor(y / 2);\n      tileRange = createOrUpdateTileRange(x, x, y, y, opt_tileRange);\n    } else {\n      tileRange = this.getTileRangeForExtentAndZ(tileCoordExtent, z, opt_tileRange);\n    }\n    if (callback.call(opt_this, z, tileRange)) {\n      return true;\n    }\n    --z;\n  }\n  return false;\n};\n\n/**\n * Get the extent for this tile grid, if it was configured.\n * @return {import(\"../extent.js\").Extent} Extent.\n */\nTileGrid.prototype.getExtent = function getExtent () {\n  return this.extent_;\n};\n\n/**\n * Get the maximum zoom level for the grid.\n * @return {number} Max zoom.\n * @api\n */\nTileGrid.prototype.getMaxZoom = function getMaxZoom () {\n  return this.maxZoom;\n};\n\n/**\n * Get the minimum zoom level for the grid.\n * @return {number} Min zoom.\n * @api\n */\nTileGrid.prototype.getMinZoom = function getMinZoom () {\n  return this.minZoom;\n};\n\n/**\n * Get the origin for the grid at the given zoom level.\n * @param {number} z Integer zoom level.\n * @return {import(\"../coordinate.js\").Coordinate} Origin.\n * @api\n */\nTileGrid.prototype.getOrigin = function getOrigin (z) {\n  if (this.origin_) {\n    return this.origin_;\n  } else {\n    return this.origins_[z];\n  }\n};\n\n/**\n * Get the resolution for the given zoom level.\n * @param {number} z Integer zoom level.\n * @return {number} Resolution.\n * @api\n */\nTileGrid.prototype.getResolution = function getResolution (z) {\n  return this.resolutions_[z];\n};\n\n/**\n * Get the list of resolutions for the tile grid.\n * @return {Array<number>} Resolutions.\n * @api\n */\nTileGrid.prototype.getResolutions = function getResolutions () {\n  return this.resolutions_;\n};\n\n/**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"../TileRange.js\").default=} opt_tileRange Temporary import(\"../TileRange.js\").default object.\n * @param {import(\"../extent.js\").Extent=} opt_extent Temporary import(\"../extent.js\").Extent object.\n * @return {import(\"../TileRange.js\").default} Tile range.\n */\nTileGrid.prototype.getTileCoordChildTileRange = function getTileCoordChildTileRange (tileCoord, opt_tileRange, opt_extent) {\n  if (tileCoord[0] < this.maxZoom) {\n    if (this.zoomFactor_ === 2) {\n      var minX = tileCoord[1] * 2;\n      var minY = tileCoord[2] * 2;\n      return createOrUpdateTileRange(minX, minX + 1, minY, minY + 1, opt_tileRange);\n    }\n    var tileCoordExtent = this.getTileCoordExtent(tileCoord, opt_extent);\n    return this.getTileRangeForExtentAndZ(\n      tileCoordExtent, tileCoord[0] + 1, opt_tileRange);\n  }\n  return null;\n};\n\n/**\n * Get the extent for a tile range.\n * @param {number} z Integer zoom level.\n * @param {import(\"../TileRange.js\").default} tileRange Tile range.\n * @param {import(\"../extent.js\").Extent=} opt_extent Temporary import(\"../extent.js\").Extent object.\n * @return {import(\"../extent.js\").Extent} Extent.\n */\nTileGrid.prototype.getTileRangeExtent = function getTileRangeExtent (z, tileRange, opt_extent) {\n  var origin = this.getOrigin(z);\n  var resolution = this.getResolution(z);\n  var tileSize = toSize(this.getTileSize(z), this.tmpSize_);\n  var minX = origin[0] + tileRange.minX * tileSize[0] * resolution;\n  var maxX = origin[0] + (tileRange.maxX + 1) * tileSize[0] * resolution;\n  var minY = origin[1] + tileRange.minY * tileSize[1] * resolution;\n  var maxY = origin[1] + (tileRange.maxY + 1) * tileSize[1] * resolution;\n  return createOrUpdate(minX, minY, maxX, maxY, opt_extent);\n};\n\n/**\n * Get a tile range for the given extent and integer zoom level.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {number} z Integer zoom level.\n * @param {import(\"../TileRange.js\").default=} opt_tileRange Temporary tile range object.\n * @return {import(\"../TileRange.js\").default} Tile range.\n */\nTileGrid.prototype.getTileRangeForExtentAndZ = function getTileRangeForExtentAndZ (extent, z, opt_tileRange) {\n  var tileCoord = tmpTileCoord;\n  this.getTileCoordForXYAndZ_(extent[0], extent[1], z, false, tileCoord);\n  var minX = tileCoord[1];\n  var minY = tileCoord[2];\n  this.getTileCoordForXYAndZ_(extent[2], extent[3], z, true, tileCoord);\n  return createOrUpdateTileRange(minX, tileCoord[1], minY, tileCoord[2], opt_tileRange);\n};\n\n/**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @return {import(\"../coordinate.js\").Coordinate} Tile center.\n */\nTileGrid.prototype.getTileCoordCenter = function getTileCoordCenter (tileCoord) {\n  var origin = this.getOrigin(tileCoord[0]);\n  var resolution = this.getResolution(tileCoord[0]);\n  var tileSize = toSize(this.getTileSize(tileCoord[0]), this.tmpSize_);\n  return [\n    origin[0] + (tileCoord[1] + 0.5) * tileSize[0] * resolution,\n    origin[1] + (tileCoord[2] + 0.5) * tileSize[1] * resolution\n  ];\n};\n\n/**\n * Get the extent of a tile coordinate.\n *\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"../extent.js\").Extent=} opt_extent Temporary extent object.\n * @return {import(\"../extent.js\").Extent} Extent.\n * @api\n */\nTileGrid.prototype.getTileCoordExtent = function getTileCoordExtent (tileCoord, opt_extent) {\n  var origin = this.getOrigin(tileCoord[0]);\n  var resolution = this.getResolution(tileCoord[0]);\n  var tileSize = toSize(this.getTileSize(tileCoord[0]), this.tmpSize_);\n  var minX = origin[0] + tileCoord[1] * tileSize[0] * resolution;\n  var minY = origin[1] + tileCoord[2] * tileSize[1] * resolution;\n  var maxX = minX + tileSize[0] * resolution;\n  var maxY = minY + tileSize[1] * resolution;\n  return createOrUpdate(minX, minY, maxX, maxY, opt_extent);\n};\n\n/**\n * Get the tile coordinate for the given map coordinate and resolution.This\n * method considers that coordinates that intersect tile boundaries should be\n * assigned the higher tile coordinate.\n *\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {number} resolution Resolution.\n * @param {import(\"../tilecoord.js\").TileCoord=} opt_tileCoord Destination import(\"../tilecoord.js\").TileCoord object.\n * @return {import(\"../tilecoord.js\").TileCoord} Tile coordinate.\n * @api\n */\nTileGrid.prototype.getTileCoordForCoordAndResolution = function getTileCoordForCoordAndResolution (coordinate, resolution, opt_tileCoord) {\n  return this.getTileCoordForXYAndResolution_(\n    coordinate[0], coordinate[1], resolution, false, opt_tileCoord);\n};\n\n/**\n * Note that this method should not be called for resolutions that correspond\n * to an integer zoom level.Instead call the `getTileCoordForXYAndZ_` method.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {number} resolution Resolution (for a non-integer zoom level).\n * @param {boolean} reverseIntersectionPolicy Instead of letting edge\n *   intersections go to the higher tile coordinate, let edge intersections\n *   go to the lower tile coordinate.\n * @param {import(\"../tilecoord.js\").TileCoord=} opt_tileCoord Temporary import(\"../tilecoord.js\").TileCoord object.\n * @return {import(\"../tilecoord.js\").TileCoord} Tile coordinate.\n * @private\n */\nTileGrid.prototype.getTileCoordForXYAndResolution_ = function getTileCoordForXYAndResolution_ (x, y, resolution, reverseIntersectionPolicy, opt_tileCoord) {\n  var z = this.getZForResolution(resolution);\n  var scale = resolution / this.getResolution(z);\n  var origin = this.getOrigin(z);\n  var tileSize = toSize(this.getTileSize(z), this.tmpSize_);\n\n  var adjustX = reverseIntersectionPolicy ? 0.5 : 0;\n  var adjustY = reverseIntersectionPolicy ? 0 : 0.5;\n  var xFromOrigin = Math.floor((x - origin[0]) / resolution + adjustX);\n  var yFromOrigin = Math.floor((y - origin[1]) / resolution + adjustY);\n  var tileCoordX = scale * xFromOrigin / tileSize[0];\n  var tileCoordY = scale * yFromOrigin / tileSize[1];\n\n  if (reverseIntersectionPolicy) {\n    tileCoordX = Math.ceil(tileCoordX) - 1;\n    tileCoordY = Math.ceil(tileCoordY) - 1;\n  } else {\n    tileCoordX = Math.floor(tileCoordX);\n    tileCoordY = Math.floor(tileCoordY);\n  }\n\n  return createOrUpdateTileCoord(z, tileCoordX, tileCoordY, opt_tileCoord);\n};\n\n/**\n * Although there is repetition between this method and `getTileCoordForXYAndResolution_`,\n * they should have separate implementations.This method is for integer zoom\n * levels.The other method should only be called for resolutions corresponding\n * to non-integer zoom levels.\n * @param {number} x Map x coordinate.\n * @param {number} y Map y coordinate.\n * @param {number} z Integer zoom level.\n * @param {boolean} reverseIntersectionPolicy Instead of letting edge\n *   intersections go to the higher tile coordinate, let edge intersections\n *   go to the lower tile coordinate.\n * @param {import(\"../tilecoord.js\").TileCoord=} opt_tileCoord Temporary import(\"../tilecoord.js\").TileCoord object.\n * @return {import(\"../tilecoord.js\").TileCoord} Tile coordinate.\n * @private\n */\nTileGrid.prototype.getTileCoordForXYAndZ_ = function getTileCoordForXYAndZ_ (x, y, z, reverseIntersectionPolicy, opt_tileCoord) {\n  var origin = this.getOrigin(z);\n  var resolution = this.getResolution(z);\n  var tileSize = toSize(this.getTileSize(z), this.tmpSize_);\n\n  var adjustX = reverseIntersectionPolicy ? 0.5 : 0;\n  var adjustY = reverseIntersectionPolicy ? 0 : 0.5;\n  var xFromOrigin = Math.floor((x - origin[0]) / resolution + adjustX);\n  var yFromOrigin = Math.floor((y - origin[1]) / resolution + adjustY);\n  var tileCoordX = xFromOrigin / tileSize[0];\n  var tileCoordY = yFromOrigin / tileSize[1];\n\n  if (reverseIntersectionPolicy) {\n    tileCoordX = Math.ceil(tileCoordX) - 1;\n    tileCoordY = Math.ceil(tileCoordY) - 1;\n  } else {\n    tileCoordX = Math.floor(tileCoordX);\n    tileCoordY = Math.floor(tileCoordY);\n  }\n\n  return createOrUpdateTileCoord(z, tileCoordX, tileCoordY, opt_tileCoord);\n};\n\n/**\n * Get a tile coordinate given a map coordinate and zoom level.\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {number} z Zoom level.\n * @param {import(\"../tilecoord.js\").TileCoord=} opt_tileCoord Destination import(\"../tilecoord.js\").TileCoord object.\n * @return {import(\"../tilecoord.js\").TileCoord} Tile coordinate.\n * @api\n */\nTileGrid.prototype.getTileCoordForCoordAndZ = function getTileCoordForCoordAndZ (coordinate, z, opt_tileCoord) {\n  return this.getTileCoordForXYAndZ_(\n    coordinate[0], coordinate[1], z, false, opt_tileCoord);\n};\n\n/**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @return {number} Tile resolution.\n */\nTileGrid.prototype.getTileCoordResolution = function getTileCoordResolution (tileCoord) {\n  return this.resolutions_[tileCoord[0]];\n};\n\n/**\n * Get the tile size for a zoom level. The type of the return value matches the\n * `tileSize` or `tileSizes` that the tile grid was configured with. To always\n * get an `import(\"../size.js\").Size`, run the result through `import(\"../size.js\").Size.toSize()`.\n * @param {number} z Z.\n * @return {number|import(\"../size.js\").Size} Tile size.\n * @api\n */\nTileGrid.prototype.getTileSize = function getTileSize (z) {\n  if (this.tileSize_) {\n    return this.tileSize_;\n  } else {\n    return this.tileSizes_[z];\n  }\n};\n\n/**\n * @param {number} z Zoom level.\n * @return {import(\"../TileRange.js\").default} Extent tile range for the specified zoom level.\n */\nTileGrid.prototype.getFullTileRange = function getFullTileRange (z) {\n  if (!this.fullTileRanges_) {\n    return null;\n  } else {\n    return this.fullTileRanges_[z];\n  }\n};\n\n/**\n * @param {number} resolution Resolution.\n * @param {number=} opt_direction If 0, the nearest resolution will be used.\n *   If 1, the nearest lower resolution will be used. If -1, the nearest\n *   higher resolution will be used. Default is 0.\n * @return {number} Z.\n * @api\n */\nTileGrid.prototype.getZForResolution = function getZForResolution (resolution, opt_direction) {\n  var z = linearFindNearest(this.resolutions_, resolution, opt_direction || 0);\n  return clamp(z, this.minZoom, this.maxZoom);\n};\n\n/**\n * @param {!import(\"../extent.js\").Extent} extent Extent for this tile grid.\n * @private\n */\nTileGrid.prototype.calculateTileRanges_ = function calculateTileRanges_ (extent) {\n  var length = this.resolutions_.length;\n  var fullTileRanges = new Array(length);\n  for (var z = this.minZoom; z < length; ++z) {\n    fullTileRanges[z] = this.getTileRangeForExtentAndZ(extent, z);\n  }\n  this.fullTileRanges_ = fullTileRanges;\n};\n\n\nexport default TileGrid;\n\n//# sourceMappingURL=TileGrid.js.map","/**\n * @module ol/tilegrid\n */\nimport {DEFAULT_MAX_ZOOM, DEFAULT_TILE_SIZE} from './tilegrid/common.js';\nimport {toSize} from './size.js';\nimport {containsCoordinate, createOrUpdate, getCorner, getHeight, getWidth} from './extent.js';\nimport Corner from './extent/Corner.js';\nimport {get as getProjection, METERS_PER_UNIT} from './proj.js';\nimport Units from './proj/Units.js';\nimport TileGrid from './tilegrid/TileGrid.js';\n\n\n/**\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @return {!TileGrid} Default tile grid for the\n * passed projection.\n */\nexport function getForProjection(projection) {\n  var tileGrid = projection.getDefaultTileGrid();\n  if (!tileGrid) {\n    tileGrid = createForProjection(projection);\n    projection.setDefaultTileGrid(tileGrid);\n  }\n  return tileGrid;\n}\n\n\n/**\n * @param {TileGrid} tileGrid Tile grid.\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @return {import(\"./tilecoord.js\").TileCoord} Tile coordinate.\n */\nexport function wrapX(tileGrid, tileCoord, projection) {\n  var z = tileCoord[0];\n  var center = tileGrid.getTileCoordCenter(tileCoord);\n  var projectionExtent = extentFromProjection(projection);\n  if (!containsCoordinate(projectionExtent, center)) {\n    var worldWidth = getWidth(projectionExtent);\n    var worldsAway = Math.ceil((projectionExtent[0] - center[0]) / worldWidth);\n    center[0] += worldWidth * worldsAway;\n    return tileGrid.getTileCoordForCoordAndZ(center, z);\n  } else {\n    return tileCoord;\n  }\n}\n\n\n/**\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number=} opt_maxZoom Maximum zoom level (default is\n *     DEFAULT_MAX_ZOOM).\n * @param {number|import(\"./size.js\").Size=} opt_tileSize Tile size (default uses\n *     DEFAULT_TILE_SIZE).\n * @param {Corner=} opt_corner Extent corner (default is `'top-left'`).\n * @return {!TileGrid} TileGrid instance.\n */\nexport function createForExtent(extent, opt_maxZoom, opt_tileSize, opt_corner) {\n  var corner = opt_corner !== undefined ? opt_corner : Corner.TOP_LEFT;\n\n  var resolutions = resolutionsFromExtent(extent, opt_maxZoom, opt_tileSize);\n\n  return new TileGrid({\n    extent: extent,\n    origin: getCorner(extent, corner),\n    resolutions: resolutions,\n    tileSize: opt_tileSize\n  });\n}\n\n\n/**\n * @typedef {Object} XYZOptions\n * @property {import(\"./extent.js\").Extent} [extent] Extent for the tile grid. The origin for an XYZ tile grid is the\n * top-left corner of the extent. The zero level of the grid is defined by the resolution at which one tile fits in the\n * provided extent. If not provided, the extent of the EPSG:3857 projection is used.\n * @property {number} [maxZoom] Maximum zoom. The default is `42`. This determines the number of levels\n * in the grid set. For example, a `maxZoom` of 21 means there are 22 levels in the grid set.\n * @property {number} [minZoom=0] Minimum zoom.\n * @property {number|import(\"./size.js\").Size} [tileSize=[256, 256]] Tile size in pixels.\n */\n\n\n/**\n * Creates a tile grid with a standard XYZ tiling scheme.\n * @param {XYZOptions=} opt_options Tile grid options.\n * @return {!TileGrid} Tile grid instance.\n * @api\n */\nexport function createXYZ(opt_options) {\n  /** @type {XYZOptions} */\n  var xyzOptions = opt_options || {};\n\n  var extent = xyzOptions.extent || getProjection('EPSG:3857').getExtent();\n\n  /** @type {import(\"./tilegrid/TileGrid.js\").Options} */\n  var gridOptions = {\n    extent: extent,\n    minZoom: xyzOptions.minZoom,\n    tileSize: xyzOptions.tileSize,\n    resolutions: resolutionsFromExtent(\n      extent,\n      xyzOptions.maxZoom,\n      xyzOptions.tileSize\n    )\n  };\n  return new TileGrid(gridOptions);\n}\n\n\n/**\n * Create a resolutions array from an extent.  A zoom factor of 2 is assumed.\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number=} opt_maxZoom Maximum zoom level (default is\n *     DEFAULT_MAX_ZOOM).\n * @param {number|import(\"./size.js\").Size=} opt_tileSize Tile size (default uses\n *     DEFAULT_TILE_SIZE).\n * @return {!Array<number>} Resolutions array.\n */\nfunction resolutionsFromExtent(extent, opt_maxZoom, opt_tileSize) {\n  var maxZoom = opt_maxZoom !== undefined ?\n    opt_maxZoom : DEFAULT_MAX_ZOOM;\n\n  var height = getHeight(extent);\n  var width = getWidth(extent);\n\n  var tileSize = toSize(opt_tileSize !== undefined ?\n    opt_tileSize : DEFAULT_TILE_SIZE);\n  var maxResolution = Math.max(\n    width / tileSize[0], height / tileSize[1]);\n\n  var length = maxZoom + 1;\n  var resolutions = new Array(length);\n  for (var z = 0; z < length; ++z) {\n    resolutions[z] = maxResolution / Math.pow(2, z);\n  }\n  return resolutions;\n}\n\n\n/**\n * @param {import(\"./proj.js\").ProjectionLike} projection Projection.\n * @param {number=} opt_maxZoom Maximum zoom level (default is\n *     DEFAULT_MAX_ZOOM).\n * @param {number|import(\"./size.js\").Size=} opt_tileSize Tile size (default uses\n *     DEFAULT_TILE_SIZE).\n * @param {Corner=} opt_corner Extent corner (default is `'top-left'`).\n * @return {!TileGrid} TileGrid instance.\n */\nexport function createForProjection(projection, opt_maxZoom, opt_tileSize, opt_corner) {\n  var extent = extentFromProjection(projection);\n  return createForExtent(extent, opt_maxZoom, opt_tileSize, opt_corner);\n}\n\n\n/**\n * Generate a tile grid extent from a projection.  If the projection has an\n * extent, it is used.  If not, a global extent is assumed.\n * @param {import(\"./proj.js\").ProjectionLike} projection Projection.\n * @return {import(\"./extent.js\").Extent} Extent.\n */\nexport function extentFromProjection(projection) {\n  projection = getProjection(projection);\n  var extent = projection.getExtent();\n  if (!extent) {\n    var half = 180 * METERS_PER_UNIT[Units.DEGREES] / projection.getMetersPerUnit();\n    extent = createOrUpdate(-half, -half, half, half);\n  }\n  return extent;\n}\n\n//# sourceMappingURL=tilegrid.js.map","/**\n * @module ol/source/Tile\n */\nimport {abstract} from '../util.js';\nimport TileCache from '../TileCache.js';\nimport TileState from '../TileState.js';\nimport Event from '../events/Event.js';\nimport {equivalent} from '../proj.js';\nimport {toSize, scale as scaleSize} from '../size.js';\nimport Source from './Source.js';\nimport {getKeyZXY, withinExtentAndZ} from '../tilecoord.js';\nimport {wrapX, getForProjection as getTileGridForProjection} from '../tilegrid.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions]\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize]\n * @property {boolean} [opaque]\n * @property {number} [tilePixelRatio]\n * @property {import(\"../proj.js\").ProjectionLike} [projection]\n * @property {import(\"./State.js\").default} [state]\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid]\n * @property {boolean} [wrapX=true]\n * @property {number} [transition]\n * @property {string} [key]\n */\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for sources providing images divided into a tile grid.\n * @abstract\n * @api\n */\nvar TileSource = /*@__PURE__*/(function (Source) {\n  function TileSource(options) {\n\n    Source.call(this, {\n      attributions: options.attributions,\n      attributionsCollapsible: options.attributionsCollapsible,\n      projection: options.projection,\n      state: options.state,\n      wrapX: options.wrapX\n    });\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.opaque_ = options.opaque !== undefined ? options.opaque : false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.tilePixelRatio_ = options.tilePixelRatio !== undefined ?\n      options.tilePixelRatio : 1;\n\n    /**\n     * @protected\n     * @type {import(\"../tilegrid/TileGrid.js\").default}\n     */\n    this.tileGrid = options.tileGrid !== undefined ? options.tileGrid : null;\n\n    /**\n     * @protected\n     * @type {import(\"../TileCache.js\").default}\n     */\n    this.tileCache = new TileCache(options.cacheSize);\n\n    /**\n     * @protected\n     * @type {import(\"../size.js\").Size}\n     */\n    this.tmpSize = [0, 0];\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.key_ = options.key || '';\n\n    /**\n     * @protected\n     * @type {import(\"../Tile.js\").Options}\n     */\n    this.tileOptions = {transition: options.transition};\n\n  }\n\n  if ( Source ) TileSource.__proto__ = Source;\n  TileSource.prototype = Object.create( Source && Source.prototype );\n  TileSource.prototype.constructor = TileSource;\n\n  /**\n   * @return {boolean} Can expire cache.\n   */\n  TileSource.prototype.canExpireCache = function canExpireCache () {\n    return this.tileCache.canExpireCache();\n  };\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @param {!Object<string, import(\"../TileRange.js\").default>} usedTiles Used tiles.\n   */\n  TileSource.prototype.expireCache = function expireCache (projection, usedTiles) {\n    var tileCache = this.getTileCacheForProjection(projection);\n    if (tileCache) {\n      tileCache.expireCache(usedTiles);\n    }\n  };\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @param {number} z Zoom level.\n   * @param {import(\"../TileRange.js\").default} tileRange Tile range.\n   * @param {function(import(\"../Tile.js\").default):(boolean|void)} callback Called with each\n   *     loaded tile.  If the callback returns `false`, the tile will not be\n   *     considered loaded.\n   * @return {boolean} The tile range is fully covered with loaded tiles.\n   */\n  TileSource.prototype.forEachLoadedTile = function forEachLoadedTile (projection, z, tileRange, callback) {\n    var tileCache = this.getTileCacheForProjection(projection);\n    if (!tileCache) {\n      return false;\n    }\n\n    var covered = true;\n    var tile, tileCoordKey, loaded;\n    for (var x = tileRange.minX; x <= tileRange.maxX; ++x) {\n      for (var y = tileRange.minY; y <= tileRange.maxY; ++y) {\n        tileCoordKey = getKeyZXY(z, x, y);\n        loaded = false;\n        if (tileCache.containsKey(tileCoordKey)) {\n          tile = /** @type {!import(\"../Tile.js\").default} */ (tileCache.get(tileCoordKey));\n          loaded = tile.getState() === TileState.LOADED;\n          if (loaded) {\n            loaded = (callback(tile) !== false);\n          }\n        }\n        if (!loaded) {\n          covered = false;\n        }\n      }\n    }\n    return covered;\n  };\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {number} Gutter.\n   */\n  TileSource.prototype.getGutterForProjection = function getGutterForProjection (projection) {\n    return 0;\n  };\n\n  /**\n   * Return the key to be used for all tiles in the source.\n   * @return {string} The key for all tiles.\n   * @protected\n   */\n  TileSource.prototype.getKey = function getKey () {\n    return this.key_;\n  };\n\n  /**\n   * Set the value to be used as the key for all tiles in the source.\n   * @param {string} key The key for tiles.\n   * @protected\n   */\n  TileSource.prototype.setKey = function setKey (key) {\n    if (this.key_ !== key) {\n      this.key_ = key;\n      this.changed();\n    }\n  };\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {boolean} Opaque.\n   */\n  TileSource.prototype.getOpaque = function getOpaque (projection) {\n    return this.opaque_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  TileSource.prototype.getResolutions = function getResolutions () {\n    return this.tileGrid.getResolutions();\n  };\n\n  /**\n   * @abstract\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {!import(\"../Tile.js\").default} Tile.\n   */\n  TileSource.prototype.getTile = function getTile (z, x, y, pixelRatio, projection) {\n    return abstract();\n  };\n\n  /**\n   * Return the tile grid of the tile source.\n   * @return {import(\"../tilegrid/TileGrid.js\").default} Tile grid.\n   * @api\n   */\n  TileSource.prototype.getTileGrid = function getTileGrid () {\n    return this.tileGrid;\n  };\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {!import(\"../tilegrid/TileGrid.js\").default} Tile grid.\n   */\n  TileSource.prototype.getTileGridForProjection = function getTileGridForProjection$1 (projection) {\n    if (!this.tileGrid) {\n      return getTileGridForProjection(projection);\n    } else {\n      return this.tileGrid;\n    }\n  };\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {import(\"../TileCache.js\").default} Tile cache.\n   * @protected\n   */\n  TileSource.prototype.getTileCacheForProjection = function getTileCacheForProjection (projection) {\n    var thisProj = this.getProjection();\n    if (thisProj && !equivalent(thisProj, projection)) {\n      return null;\n    } else {\n      return this.tileCache;\n    }\n  };\n\n  /**\n   * Get the tile pixel ratio for this source. Subclasses may override this\n   * method, which is meant to return a supported pixel ratio that matches the\n   * provided `pixelRatio` as close as possible.\n   * @param {number} pixelRatio Pixel ratio.\n   * @return {number} Tile pixel ratio.\n   */\n  TileSource.prototype.getTilePixelRatio = function getTilePixelRatio (pixelRatio) {\n    return this.tilePixelRatio_;\n  };\n\n  /**\n   * @param {number} z Z.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {import(\"../size.js\").Size} Tile size.\n   */\n  TileSource.prototype.getTilePixelSize = function getTilePixelSize (z, pixelRatio, projection) {\n    var tileGrid = this.getTileGridForProjection(projection);\n    var tilePixelRatio = this.getTilePixelRatio(pixelRatio);\n    var tileSize = toSize(tileGrid.getTileSize(z), this.tmpSize);\n    if (tilePixelRatio == 1) {\n      return tileSize;\n    } else {\n      return scaleSize(tileSize, tilePixelRatio, this.tmpSize);\n    }\n  };\n\n  /**\n   * Returns a tile coordinate wrapped around the x-axis. When the tile coordinate\n   * is outside the resolution and extent range of the tile grid, `null` will be\n   * returned.\n   * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n   * @param {import(\"../proj/Projection.js\").default=} opt_projection Projection.\n   * @return {import(\"../tilecoord.js\").TileCoord} Tile coordinate to be passed to the tileUrlFunction or\n   *     null if no tile URL should be created for the passed `tileCoord`.\n   */\n  TileSource.prototype.getTileCoordForTileUrlFunction = function getTileCoordForTileUrlFunction (tileCoord, opt_projection) {\n    var projection = opt_projection !== undefined ?\n      opt_projection : this.getProjection();\n    var tileGrid = this.getTileGridForProjection(projection);\n    if (this.getWrapX() && projection.isGlobal()) {\n      tileCoord = wrapX(tileGrid, tileCoord, projection);\n    }\n    return withinExtentAndZ(tileCoord, tileGrid) ? tileCoord : null;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  TileSource.prototype.refresh = function refresh () {\n    this.tileCache.clear();\n    this.changed();\n  };\n\n  /**\n   * Marks a tile coord as being used, without triggering a load.\n   * @abstract\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   */\n  TileSource.prototype.useTile = function useTile (z, x, y, projection) {};\n\n  return TileSource;\n}(Source));\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/source/Tile~TileSource} instances are instances of this\n * type.\n */\nexport var TileSourceEvent = /*@__PURE__*/(function (Event) {\n  function TileSourceEvent(type, tile) {\n\n    Event.call(this, type);\n\n    /**\n     * The tile related to the event.\n     * @type {import(\"../Tile.js\").default}\n     * @api\n     */\n    this.tile = tile;\n\n  }\n\n  if ( Event ) TileSourceEvent.__proto__ = Event;\n  TileSourceEvent.prototype = Object.create( Event && Event.prototype );\n  TileSourceEvent.prototype.constructor = TileSourceEvent;\n\n  return TileSourceEvent;\n}(Event));\n\nexport default TileSource;\n\n//# sourceMappingURL=Tile.js.map","/**\n * @module ol/renderer/webgl/tilelayershader\n */\n// This file is automatically generated, do not edit.\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../webgl.js';\nimport WebGLFragment from '../../webgl/Fragment.js';\nimport WebGLVertex from '../../webgl/Vertex.js';\n\nexport var fragment = new WebGLFragment(DEBUG_WEBGL ?\n  'precision mediump float;\\nvarying vec2 v_texCoord;\\n\\n\\nuniform sampler2D u_texture;\\n\\nvoid main(void) {\\n  gl_FragColor = texture2D(u_texture, v_texCoord);\\n}\\n' :\n  'precision mediump float;varying vec2 a;uniform sampler2D e;void main(void){gl_FragColor=texture2D(e,a);}');\n\nexport var vertex = new WebGLVertex(DEBUG_WEBGL ?\n  'varying vec2 v_texCoord;\\n\\n\\nattribute vec2 a_position;\\nattribute vec2 a_texCoord;\\nuniform vec4 u_tileOffset;\\n\\nvoid main(void) {\\n  gl_Position = vec4(a_position * u_tileOffset.xy + u_tileOffset.zw, 0., 1.);\\n  v_texCoord = a_texCoord;\\n}\\n\\n\\n' :\n  'varying vec2 a;attribute vec2 b;attribute vec2 c;uniform vec4 d;void main(void){gl_Position=vec4(b*d.xy+d.zw,0.,1.);a=c;}');\n\n//# sourceMappingURL=tilelayershader.js.map","/**\n * @module ol/renderer/webgl/tilelayershader/Locations\n */\n// This file is automatically generated, do not edit\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../webgl.js';\n\nvar Locations = function Locations(gl, program) {\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_tileOffset = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_tileOffset' : 'd');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_texture = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_texture' : 'e');\n\n  /**\n   * @type {number}\n   */\n  this.a_position = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_position' : 'b');\n\n  /**\n   * @type {number}\n   */\n  this.a_texCoord = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_texCoord' : 'c');\n\n};\n\nexport default Locations;\n\n//# sourceMappingURL=Locations.js.map","/**\n * @module ol/renderer/webgl/TileLayer\n */\n// FIXME large resolutions lead to too large framebuffers :-(\n// FIXME animated shaders! check in redraw\n\nimport LayerType from '../../LayerType.js';\nimport ImageTile from '../../ImageTile.js';\nimport TileRange from '../../TileRange.js';\nimport TileState from '../../TileState.js';\nimport TileSource from '../../source/Tile.js';\nimport {numberSafeCompareFunction} from '../../array.js';\nimport {createEmpty, intersects} from '../../extent.js';\nimport {roundUpToPowerOfTwo} from '../../math.js';\nimport WebGLLayerRenderer from './Layer.js';\nimport {fragment, vertex} from './tilelayershader.js';\nimport Locations from './tilelayershader/Locations.js';\nimport {toSize} from '../../size.js';\nimport {\n  reset as resetTransform,\n  rotate as rotateTransform,\n  scale as scaleTransform,\n  translate as translateTransform,\n  apply as applyTransform\n} from '../../transform.js';\nimport {COLOR_BUFFER_BIT, BLEND, ARRAY_BUFFER, FLOAT, LINEAR, TRIANGLE_STRIP} from '../../webgl.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\n\n/**\n * @classdesc\n * WebGL renderer for tile layers.\n * @api\n */\nvar WebGLTileLayerRenderer = /*@__PURE__*/(function (WebGLLayerRenderer) {\n  function WebGLTileLayerRenderer(mapRenderer, tileLayer) {\n\n    WebGLLayerRenderer.call(this, mapRenderer, tileLayer);\n\n    /**\n     * @private\n     * @type {import(\"../../webgl/Fragment.js\").default}\n     */\n    this.fragmentShader_ = fragment;\n\n    /**\n     * @private\n     * @type {import(\"../../webgl/Vertex.js\").default}\n     */\n    this.vertexShader_ = vertex;\n\n    /**\n     * @private\n     * @type {import(\"./tilelayershader/Locations.js\").default}\n     */\n    this.locations_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../webgl/Buffer.js\").default}\n     */\n    this.renderArrayBuffer_ = new WebGLBuffer([\n      0, 0, 0, 1,\n      1, 0, 1, 1,\n      0, 1, 0, 0,\n      1, 1, 1, 0\n    ]);\n\n    /**\n     * @private\n     * @type {import(\"../../TileRange.js\").default}\n     */\n    this.renderedTileRange_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.renderedFramebufferExtent_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedRevision_ = -1;\n\n    /**\n     * @private\n     * @type {import(\"../../size.js\").Size}\n     */\n    this.tmpSize_ = [0, 0];\n\n  }\n\n  if ( WebGLLayerRenderer ) WebGLTileLayerRenderer.__proto__ = WebGLLayerRenderer;\n  WebGLTileLayerRenderer.prototype = Object.create( WebGLLayerRenderer && WebGLLayerRenderer.prototype );\n  WebGLTileLayerRenderer.prototype.constructor = WebGLTileLayerRenderer;\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTileLayerRenderer.prototype.disposeInternal = function disposeInternal () {\n    var context = this.mapRenderer.getContext();\n    context.deleteBuffer(this.renderArrayBuffer_);\n    WebGLLayerRenderer.prototype.disposeInternal.call(this);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTileLayerRenderer.prototype.createLoadedTileFinder = function createLoadedTileFinder (source, projection, tiles) {\n    var mapRenderer = this.mapRenderer;\n\n    return (\n      /**\n       * @param {number} zoom Zoom level.\n       * @param {import(\"../../TileRange.js\").default} tileRange Tile range.\n       * @return {boolean} The tile range is fully loaded.\n       */\n      function(zoom, tileRange) {\n        function callback(tile) {\n          var loaded = mapRenderer.isTileTextureLoaded(tile);\n          if (loaded) {\n            if (!tiles[zoom]) {\n              tiles[zoom] = {};\n            }\n            tiles[zoom][tile.tileCoord.toString()] = tile;\n          }\n          return loaded;\n        }\n        return source.forEachLoadedTile(projection, zoom, tileRange, callback);\n      }\n    );\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTileLayerRenderer.prototype.handleWebGLContextLost = function handleWebGLContextLost () {\n    WebGLLayerRenderer.prototype.handleWebGLContextLost.call(this);\n    this.locations_ = null;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTileLayerRenderer.prototype.prepareFrame = function prepareFrame (frameState, layerState, context) {\n\n    var mapRenderer = this.mapRenderer;\n    var gl = context.getGL();\n\n    var viewState = frameState.viewState;\n    var projection = viewState.projection;\n\n    var tileLayer = /** @type {import(\"../../layer/Tile.js\").default} */ (this.getLayer());\n    var tileSource = tileLayer.getSource();\n    if (!(tileSource instanceof TileSource)) {\n      return true;\n    }\n\n    var tileGrid = tileSource.getTileGridForProjection(projection);\n    var z = tileGrid.getZForResolution(viewState.resolution);\n    var tileResolution = tileGrid.getResolution(z);\n\n    var tilePixelSize =\n        tileSource.getTilePixelSize(z, frameState.pixelRatio, projection);\n    var pixelRatio = tilePixelSize[0] /\n        toSize(tileGrid.getTileSize(z), this.tmpSize_)[0];\n    var tilePixelResolution = tileResolution / pixelRatio;\n    var tileGutter = tileSource.getTilePixelRatio(pixelRatio) * tileSource.getGutterForProjection(projection);\n\n    var center = viewState.center;\n    var extent = frameState.extent;\n    var tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z);\n\n    var framebufferExtent;\n    if (this.renderedTileRange_ &&\n        this.renderedTileRange_.equals(tileRange) &&\n        this.renderedRevision_ == tileSource.getRevision()) {\n      framebufferExtent = this.renderedFramebufferExtent_;\n    } else {\n\n      var tileRangeSize = tileRange.getSize();\n\n      var maxDimension = Math.max(\n        tileRangeSize[0] * tilePixelSize[0],\n        tileRangeSize[1] * tilePixelSize[1]);\n      var framebufferDimension = roundUpToPowerOfTwo(maxDimension);\n      var framebufferExtentDimension = tilePixelResolution * framebufferDimension;\n      var origin = tileGrid.getOrigin(z);\n      var minX = origin[0] +\n          tileRange.minX * tilePixelSize[0] * tilePixelResolution;\n      var minY = origin[1] +\n          tileRange.minY * tilePixelSize[1] * tilePixelResolution;\n      framebufferExtent = [\n        minX, minY,\n        minX + framebufferExtentDimension, minY + framebufferExtentDimension\n      ];\n\n      this.bindFramebuffer(frameState, framebufferDimension);\n      gl.viewport(0, 0, framebufferDimension, framebufferDimension);\n\n      gl.clearColor(0, 0, 0, 0);\n      gl.clear(COLOR_BUFFER_BIT);\n      gl.disable(BLEND);\n\n      var program = context.getProgram(this.fragmentShader_, this.vertexShader_);\n      context.useProgram(program);\n      if (!this.locations_) {\n        this.locations_ = new Locations(gl, program);\n      }\n\n      context.bindBuffer(ARRAY_BUFFER, this.renderArrayBuffer_);\n      gl.enableVertexAttribArray(this.locations_.a_position);\n      gl.vertexAttribPointer(\n        this.locations_.a_position, 2, FLOAT, false, 16, 0);\n      gl.enableVertexAttribArray(this.locations_.a_texCoord);\n      gl.vertexAttribPointer(\n        this.locations_.a_texCoord, 2, FLOAT, false, 16, 8);\n      gl.uniform1i(this.locations_.u_texture, 0);\n\n      /**\n       * @type {Object<number, Object<string, import(\"../../Tile.js\").default>>}\n       */\n      var tilesToDrawByZ = {};\n      tilesToDrawByZ[z] = {};\n\n      var findLoadedTiles = this.createLoadedTileFinder(\n        tileSource, projection, tilesToDrawByZ);\n\n      var useInterimTilesOnError = tileLayer.getUseInterimTilesOnError();\n      var allTilesLoaded = true;\n      var tmpExtent = createEmpty();\n      var tmpTileRange = new TileRange(0, 0, 0, 0);\n      var childTileRange, drawable, fullyLoaded, tile, tileState;\n      var x, y, tileExtent;\n      for (x = tileRange.minX; x <= tileRange.maxX; ++x) {\n        for (y = tileRange.minY; y <= tileRange.maxY; ++y) {\n\n          tile = tileSource.getTile(z, x, y, pixelRatio, projection);\n          if (layerState.extent !== undefined) {\n            // ignore tiles outside layer extent\n            tileExtent = tileGrid.getTileCoordExtent(tile.tileCoord, tmpExtent);\n            if (!intersects(tileExtent, layerState.extent)) {\n              continue;\n            }\n          }\n          tileState = tile.getState();\n          drawable = tileState == TileState.LOADED ||\n              tileState == TileState.EMPTY ||\n              tileState == TileState.ERROR && !useInterimTilesOnError;\n          if (!drawable) {\n            tile = tile.getInterimTile();\n          }\n          tileState = tile.getState();\n          if (tileState == TileState.LOADED) {\n            if (mapRenderer.isTileTextureLoaded(tile)) {\n              tilesToDrawByZ[z][tile.tileCoord.toString()] = tile;\n              continue;\n            }\n          } else if (tileState == TileState.EMPTY ||\n                     (tileState == TileState.ERROR &&\n                      !useInterimTilesOnError)) {\n            continue;\n          }\n\n          allTilesLoaded = false;\n          fullyLoaded = tileGrid.forEachTileCoordParentTileRange(\n            tile.tileCoord, findLoadedTiles, null, tmpTileRange, tmpExtent);\n          if (!fullyLoaded) {\n            childTileRange = tileGrid.getTileCoordChildTileRange(\n              tile.tileCoord, tmpTileRange, tmpExtent);\n            if (childTileRange) {\n              findLoadedTiles(z + 1, childTileRange);\n            }\n          }\n\n        }\n\n      }\n\n      /** @type {Array<number>} */\n      var zs = Object.keys(tilesToDrawByZ).map(Number);\n      zs.sort(numberSafeCompareFunction);\n      var u_tileOffset = new Float32Array(4);\n      for (var i = 0, ii = zs.length; i < ii; ++i) {\n        var tilesToDraw = tilesToDrawByZ[zs[i]];\n        for (var tileKey in tilesToDraw) {\n          tile = tilesToDraw[tileKey];\n\n          if (!(tile instanceof ImageTile)) {\n            continue;\n          }\n\n          tileExtent = tileGrid.getTileCoordExtent(tile.tileCoord, tmpExtent);\n          u_tileOffset[0] = 2 * (tileExtent[2] - tileExtent[0]) /\n              framebufferExtentDimension;\n          u_tileOffset[1] = 2 * (tileExtent[3] - tileExtent[1]) /\n              framebufferExtentDimension;\n          u_tileOffset[2] = 2 * (tileExtent[0] - framebufferExtent[0]) /\n              framebufferExtentDimension - 1;\n          u_tileOffset[3] = 2 * (tileExtent[1] - framebufferExtent[1]) /\n              framebufferExtentDimension - 1;\n          gl.uniform4fv(this.locations_.u_tileOffset, u_tileOffset);\n          mapRenderer.bindTileTexture(tile, tilePixelSize,\n            tileGutter * pixelRatio, LINEAR, LINEAR);\n          gl.drawArrays(TRIANGLE_STRIP, 0, 4);\n        }\n      }\n\n      if (allTilesLoaded) {\n        this.renderedTileRange_ = tileRange;\n        this.renderedFramebufferExtent_ = framebufferExtent;\n        this.renderedRevision_ = tileSource.getRevision();\n      } else {\n        this.renderedTileRange_ = null;\n        this.renderedFramebufferExtent_ = null;\n        this.renderedRevision_ = -1;\n        frameState.animate = true;\n      }\n\n    }\n\n    this.updateUsedTiles(frameState.usedTiles, tileSource, z, tileRange);\n    var tileTextureQueue = mapRenderer.getTileTextureQueue();\n    this.manageTilePyramid(\n      frameState, tileSource, tileGrid, pixelRatio, projection, extent, z,\n      tileLayer.getPreload(),\n      /**\n       * @param {import(\"../../Tile.js\").default} tile Tile.\n       */\n      function(tile) {\n        if (tile.getState() == TileState.LOADED &&\n              !mapRenderer.isTileTextureLoaded(tile) &&\n              !tileTextureQueue.isKeyQueued(tile.getKey())) {\n          tileTextureQueue.enqueue([\n            tile,\n            tileGrid.getTileCoordCenter(tile.tileCoord),\n            tileGrid.getResolution(tile.tileCoord[0]),\n            tilePixelSize, tileGutter * pixelRatio\n          ]);\n        }\n      }, this);\n    this.scheduleExpireCache(frameState, tileSource);\n\n    var texCoordMatrix = this.texCoordMatrix;\n    resetTransform(texCoordMatrix);\n    translateTransform(texCoordMatrix,\n      (Math.round(center[0] / tileResolution) * tileResolution - framebufferExtent[0]) /\n            (framebufferExtent[2] - framebufferExtent[0]),\n      (Math.round(center[1] / tileResolution) * tileResolution - framebufferExtent[1]) /\n            (framebufferExtent[3] - framebufferExtent[1]));\n    if (viewState.rotation !== 0) {\n      rotateTransform(texCoordMatrix, viewState.rotation);\n    }\n    scaleTransform(texCoordMatrix,\n      frameState.size[0] * viewState.resolution /\n            (framebufferExtent[2] - framebufferExtent[0]),\n      frameState.size[1] * viewState.resolution /\n            (framebufferExtent[3] - framebufferExtent[1]));\n    translateTransform(texCoordMatrix, -0.5, -0.5);\n\n    return true;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTileLayerRenderer.prototype.forEachLayerAtPixel = function forEachLayerAtPixel (pixel, frameState, callback, thisArg) {\n    if (!this.framebuffer) {\n      return undefined;\n    }\n\n    var pixelOnMapScaled = [\n      pixel[0] / frameState.size[0],\n      (frameState.size[1] - pixel[1]) / frameState.size[1]];\n\n    var pixelOnFrameBufferScaled = applyTransform(\n      this.texCoordMatrix, pixelOnMapScaled.slice());\n    var pixelOnFrameBuffer = [\n      pixelOnFrameBufferScaled[0] * this.framebufferDimension,\n      pixelOnFrameBufferScaled[1] * this.framebufferDimension];\n\n    var gl = this.mapRenderer.getContext().getGL();\n    gl.bindFramebuffer(gl.FRAMEBUFFER, this.framebuffer);\n    var imageData = new Uint8Array(4);\n    gl.readPixels(pixelOnFrameBuffer[0], pixelOnFrameBuffer[1], 1, 1,\n      gl.RGBA, gl.UNSIGNED_BYTE, imageData);\n\n    if (imageData[3] > 0) {\n      return callback.call(thisArg, this.getLayer(), imageData);\n    } else {\n      return undefined;\n    }\n  };\n\n  return WebGLTileLayerRenderer;\n}(WebGLLayerRenderer));\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {import(\"../../layer/Layer.js\").default} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nWebGLTileLayerRenderer['handles'] = function(layer) {\n  return layer.getType() === LayerType.TILE;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {import(\"../Map.js\").default} mapRenderer The map renderer.\n * @param {import(\"../../layer/Layer.js\").default} layer The layer to be rendererd.\n * @return {WebGLTileLayerRenderer} The layer renderer.\n */\nWebGLTileLayerRenderer['create'] = function(mapRenderer, layer) {\n  return new WebGLTileLayerRenderer(\n    /** @type {import(\"./Map.js\").default} */ (mapRenderer),\n    /** @type {import(\"../../layer/Tile.js\").default} */ (layer)\n  );\n};\n\n\nexport default WebGLTileLayerRenderer;\n\n//# sourceMappingURL=TileLayer.js.map","/**\n * @module ol/renderer/webgl/VectorLayer\n */\nimport {getUid} from '../../util.js';\nimport LayerType from '../../LayerType.js';\nimport ViewHint from '../../ViewHint.js';\nimport {buffer, containsExtent, createEmpty} from '../../extent.js';\nimport WebGLReplayGroup from '../../render/webgl/ReplayGroup.js';\nimport {defaultOrder as defaultRenderOrder, getTolerance as getRenderTolerance, getSquaredTolerance as getSquaredRenderTolerance, renderFeature} from '../vector.js';\nimport WebGLLayerRenderer from './Layer.js';\nimport {apply as applyTransform} from '../../transform.js';\n\n\n/**\n * @classdesc\n * WebGL renderer for vector layers.\n * @api\n */\nvar WebGLVectorLayerRenderer = /*@__PURE__*/(function (WebGLLayerRenderer) {\n  function WebGLVectorLayerRenderer(mapRenderer, vectorLayer) {\n\n    WebGLLayerRenderer.call(this, mapRenderer, vectorLayer);\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.dirty_ = false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedRevision_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedResolution_ = NaN;\n\n    /**\n     * @private\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.renderedExtent_ = createEmpty();\n\n    /**\n     * @private\n     * @type {function(import(\"../../Feature.js\").default, import(\"../../Feature.js\").default): number|null}\n     */\n    this.renderedRenderOrder_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../render/webgl/ReplayGroup.js\").default}\n     */\n    this.replayGroup_ = null;\n\n    /**\n     * The last layer state.\n     * @private\n     * @type {?import(\"../../layer/Layer.js\").State}\n     */\n    this.layerState_ = null;\n\n  }\n\n  if ( WebGLLayerRenderer ) WebGLVectorLayerRenderer.__proto__ = WebGLLayerRenderer;\n  WebGLVectorLayerRenderer.prototype = Object.create( WebGLLayerRenderer && WebGLLayerRenderer.prototype );\n  WebGLVectorLayerRenderer.prototype.constructor = WebGLVectorLayerRenderer;\n\n  /**\n   * @inheritDoc\n   */\n  WebGLVectorLayerRenderer.prototype.composeFrame = function composeFrame (frameState, layerState, context) {\n    this.layerState_ = layerState;\n    var viewState = frameState.viewState;\n    var replayGroup = this.replayGroup_;\n    var size = frameState.size;\n    var pixelRatio = frameState.pixelRatio;\n    var gl = this.mapRenderer.getGL();\n    if (replayGroup && !replayGroup.isEmpty()) {\n      gl.enable(gl.SCISSOR_TEST);\n      gl.scissor(0, 0, size[0] * pixelRatio, size[1] * pixelRatio);\n      replayGroup.replay(context,\n        viewState.center, viewState.resolution, viewState.rotation,\n        size, pixelRatio, layerState.opacity,\n        layerState.managed ? frameState.skippedFeatureUids : {});\n      gl.disable(gl.SCISSOR_TEST);\n    }\n\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLVectorLayerRenderer.prototype.disposeInternal = function disposeInternal () {\n    var replayGroup = this.replayGroup_;\n    if (replayGroup) {\n      var context = this.mapRenderer.getContext();\n      replayGroup.getDeleteResourcesFunction(context)();\n      this.replayGroup_ = null;\n    }\n    WebGLLayerRenderer.prototype.disposeInternal.call(this);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLVectorLayerRenderer.prototype.forEachFeatureAtCoordinate = function forEachFeatureAtCoordinate (coordinate, frameState, hitTolerance, callback, thisArg) {\n    if (!this.replayGroup_ || !this.layerState_) {\n      return undefined;\n    } else {\n      var context = this.mapRenderer.getContext();\n      var viewState = frameState.viewState;\n      var layer = this.getLayer();\n      var layerState = this.layerState_;\n      /** @type {!Object<string, boolean>} */\n      var features = {};\n      return this.replayGroup_.forEachFeatureAtCoordinate(coordinate,\n        context, viewState.center, viewState.resolution, viewState.rotation,\n        frameState.size, frameState.pixelRatio, layerState.opacity,\n        {},\n        /**\n         * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n         * @return {?} Callback result.\n         */\n        function(feature) {\n          var key = getUid(feature);\n          if (!(key in features)) {\n            features[key] = true;\n            return callback.call(thisArg, feature, layer);\n          }\n        });\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLVectorLayerRenderer.prototype.hasFeatureAtCoordinate = function hasFeatureAtCoordinate (coordinate, frameState) {\n    if (!this.replayGroup_ || !this.layerState_) {\n      return false;\n    } else {\n      var context = this.mapRenderer.getContext();\n      var viewState = frameState.viewState;\n      var layerState = this.layerState_;\n      return this.replayGroup_.hasFeatureAtCoordinate(coordinate,\n        context, viewState.center, viewState.resolution, viewState.rotation,\n        frameState.size, frameState.pixelRatio, layerState.opacity,\n        frameState.skippedFeatureUids);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLVectorLayerRenderer.prototype.forEachLayerAtPixel = function forEachLayerAtPixel (pixel, frameState, callback, thisArg) {\n    var coordinate = applyTransform(\n      frameState.pixelToCoordinateTransform, pixel.slice());\n    var hasFeature = this.hasFeatureAtCoordinate(coordinate, frameState);\n\n    if (hasFeature) {\n      return callback.call(thisArg, this.getLayer(), null);\n    } else {\n      return undefined;\n    }\n  };\n\n  /**\n   * Handle changes in image style state.\n   * @param {import(\"../../events/Event.js\").default} event Image style change event.\n   * @private\n   */\n  WebGLVectorLayerRenderer.prototype.handleStyleImageChange_ = function handleStyleImageChange_ (event) {\n    this.renderIfReadyAndVisible();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLVectorLayerRenderer.prototype.prepareFrame = function prepareFrame (frameState, layerState, context) {\n    var vectorLayer = /** @type {import(\"../../layer/Vector.js\").default} */ (this.getLayer());\n    var vectorSource = /** @type {import(\"../../source/Vector.js\").default} */ (vectorLayer.getSource());\n\n    var animating = frameState.viewHints[ViewHint.ANIMATING];\n    var interacting = frameState.viewHints[ViewHint.INTERACTING];\n    var updateWhileAnimating = vectorLayer.getUpdateWhileAnimating();\n    var updateWhileInteracting = vectorLayer.getUpdateWhileInteracting();\n\n    if (!this.dirty_ && (!updateWhileAnimating && animating) ||\n        (!updateWhileInteracting && interacting)) {\n      return true;\n    }\n\n    var frameStateExtent = frameState.extent;\n    var viewState = frameState.viewState;\n    var projection = viewState.projection;\n    var resolution = viewState.resolution;\n    var pixelRatio = frameState.pixelRatio;\n    var vectorLayerRevision = vectorLayer.getRevision();\n    var vectorLayerRenderBuffer = vectorLayer.getRenderBuffer();\n    var vectorLayerRenderOrder = vectorLayer.getRenderOrder();\n\n    if (vectorLayerRenderOrder === undefined) {\n      vectorLayerRenderOrder = defaultRenderOrder;\n    }\n\n    var extent = buffer(frameStateExtent,\n      vectorLayerRenderBuffer * resolution);\n\n    if (!this.dirty_ &&\n        this.renderedResolution_ == resolution &&\n        this.renderedRevision_ == vectorLayerRevision &&\n        this.renderedRenderOrder_ == vectorLayerRenderOrder &&\n        containsExtent(this.renderedExtent_, extent)) {\n      return true;\n    }\n\n    if (this.replayGroup_) {\n      frameState.postRenderFunctions.push(\n        this.replayGroup_.getDeleteResourcesFunction(context));\n    }\n\n    this.dirty_ = false;\n\n    var replayGroup = new WebGLReplayGroup(\n      getRenderTolerance(resolution, pixelRatio),\n      extent, vectorLayer.getRenderBuffer());\n    vectorSource.loadFeatures(extent, resolution, projection);\n    /**\n     * @param {import(\"../../Feature.js\").default} feature Feature.\n     * @this {WebGLVectorLayerRenderer}\n     */\n    var render = function(feature) {\n      var styles;\n      var styleFunction = feature.getStyleFunction() || vectorLayer.getStyleFunction();\n      if (styleFunction) {\n        styles = styleFunction(feature, resolution);\n      }\n      if (styles) {\n        var dirty = this.renderFeature(\n          feature, resolution, pixelRatio, styles, replayGroup);\n        this.dirty_ = this.dirty_ || dirty;\n      }\n    }.bind(this);\n    if (vectorLayerRenderOrder) {\n      /** @type {Array<import(\"../../Feature.js\").default>} */\n      var features = [];\n      vectorSource.forEachFeatureInExtent(extent,\n        /**\n         * @param {import(\"../../Feature.js\").default} feature Feature.\n         */\n        function(feature) {\n          features.push(feature);\n        });\n      features.sort(vectorLayerRenderOrder);\n      features.forEach(render.bind(this));\n    } else {\n      vectorSource.forEachFeatureInExtent(extent, render);\n    }\n    replayGroup.finish(context);\n\n    this.renderedResolution_ = resolution;\n    this.renderedRevision_ = vectorLayerRevision;\n    this.renderedRenderOrder_ = vectorLayerRenderOrder;\n    this.renderedExtent_ = extent;\n    this.replayGroup_ = replayGroup;\n\n    return true;\n  };\n\n  /**\n   * @param {import(\"../../Feature.js\").default} feature Feature.\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../../style/Style.js\").default|Array<import(\"../../style/Style.js\").default>} styles The style or array of\n   *     styles.\n   * @param {import(\"../../render/webgl/ReplayGroup.js\").default} replayGroup Replay group.\n   * @return {boolean} `true` if an image is loading.\n   */\n  WebGLVectorLayerRenderer.prototype.renderFeature = function renderFeature$1 (feature, resolution, pixelRatio, styles, replayGroup) {\n    if (!styles) {\n      return false;\n    }\n    var loading = false;\n    if (Array.isArray(styles)) {\n      for (var i = styles.length - 1, ii = 0; i >= ii; --i) {\n        loading = renderFeature(\n          replayGroup, feature, styles[i],\n          getSquaredRenderTolerance(resolution, pixelRatio),\n          this.handleStyleImageChange_, this) || loading;\n      }\n    } else {\n      loading = renderFeature(\n        replayGroup, feature, styles,\n        getSquaredRenderTolerance(resolution, pixelRatio),\n        this.handleStyleImageChange_, this) || loading;\n    }\n    return loading;\n  };\n\n  return WebGLVectorLayerRenderer;\n}(WebGLLayerRenderer));\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {import(\"../../layer/Layer.js\").default} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nWebGLVectorLayerRenderer['handles'] = function(layer) {\n  return layer.getType() === LayerType.VECTOR;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {import(\"../Map.js\").default} mapRenderer The map renderer.\n * @param {import(\"../../layer/Layer.js\").default} layer The layer to be rendererd.\n * @return {WebGLVectorLayerRenderer} The layer renderer.\n */\nWebGLVectorLayerRenderer['create'] = function(mapRenderer, layer) {\n  return new WebGLVectorLayerRenderer(\n    /** @type {import(\"./Map.js\").default} */ (mapRenderer),\n    /** @type {import(\"../../layer/Vector.js\").default} */ (layer)\n  );\n};\n\n\nexport default WebGLVectorLayerRenderer;\n\n//# sourceMappingURL=VectorLayer.js.map","/**\n * @module ol/WebGLMap\n */\nimport PluggableMap from './PluggableMap.js';\nimport {defaults as defaultControls} from './control.js';\nimport {defaults as defaultInteractions} from './interaction.js';\nimport {assign} from './obj.js';\nimport WebGLImageLayerRenderer from './renderer/webgl/ImageLayer.js';\nimport WebGLMapRenderer from './renderer/webgl/Map.js';\nimport WebGLTileLayerRenderer from './renderer/webgl/TileLayer.js';\nimport WebGLVectorLayerRenderer from './renderer/webgl/VectorLayer.js';\n\n\n/**\n * @classdesc\n * The WebGLMap uses WebGL for rendering map layers.  This renderer has limited\n * support for vector data and no support for vector tiles.\n *\n *     import WebGLMap from 'ol/WebGLMap';\n *     import TileLayer from 'ol/layer/Tile';\n *     import OSM from 'ol/source/OSM';\n *     import View from 'ol/View';\n *\n *     var map = new WebGLMap({\n *       view: new View({\n *         center: [0, 0],\n *         zoom: 1\n *       }),\n *       layers: [\n *         new TileLayer({\n *           source: new OSM()\n *         })\n *       ],\n *       target: 'map'\n *     });\n *\n * The above snippet creates a map using a {@link module:ol/layer/Tile~Tile} to\n * display {@link module:ol/source/OSM~OSM} OSM data and render it to a DOM\n * element with the id `map`.\n *\n * The constructor places a viewport container (with CSS class name\n * `ol-viewport`) in the target element (see `getViewport()`), and then two\n * further elements within the viewport: one with CSS class name\n * `ol-overlaycontainer-stopevent` for controls and some overlays, and one with\n * CSS class name `ol-overlaycontainer` for other overlays (see the `stopEvent`\n * option of {@link module:ol/Overlay~Overlay} for the difference). The map\n * itself is placed in a further element within the viewport.\n *\n * Layers are stored as a {@link module:ol/Collection~Collection} in\n * layerGroups. A top-level group is provided by the library. This is what is\n * accessed by `getLayerGroup` and `setLayerGroup`. Layers entered in the\n * options are added to this group, and `addLayer` and `removeLayer` change the\n * layer collection in the group. `getLayers` is a convenience function for\n * `getLayerGroup().getLayers()`.\n * Note that {@link module:ol/layer/Group~Group} is a subclass of\n * {@link module:ol/layer/Base}, so layers entered in the options or added\n * with `addLayer` can be groups, which can contain further groups, and so on.\n *\n * @fires import(\"./MapBrowserEvent.js\").MapBrowserEvent\n * @fires import(\"./MapEvent.js\").MapEvent\n * @fires module:ol/render/Event~RenderEvent#postcompose\n * @fires module:ol/render/Event~RenderEvent#precompose\n * @api\n */\nvar WebGLMap = /*@__PURE__*/(function (PluggableMap) {\n  function WebGLMap(options) {\n    options = assign({}, options);\n    if (!options.controls) {\n      options.controls = defaultControls();\n    }\n    if (!options.interactions) {\n      options.interactions = defaultInteractions();\n    }\n\n    PluggableMap.call(this, options);\n  }\n\n  if ( PluggableMap ) WebGLMap.__proto__ = PluggableMap;\n  WebGLMap.prototype = Object.create( PluggableMap && PluggableMap.prototype );\n  WebGLMap.prototype.constructor = WebGLMap;\n\n  WebGLMap.prototype.createRenderer = function createRenderer () {\n    var renderer = new WebGLMapRenderer(this);\n    renderer.registerLayerRenderers([\n      WebGLImageLayerRenderer,\n      WebGLTileLayerRenderer,\n      WebGLVectorLayerRenderer\n    ]);\n    return renderer;\n  };\n\n  return WebGLMap;\n}(PluggableMap));\n\n\nexport default WebGLMap;\n\n//# sourceMappingURL=WebGLMap.js.map","/**\n * @module ol/loadingstrategy\n */\n\n\n/**\n * Strategy function for loading all features with a single request.\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @return {Array<import(\"./extent.js\").Extent>} Extents.\n * @api\n */\nexport function all(extent, resolution) {\n  return [[-Infinity, -Infinity, Infinity, Infinity]];\n}\n\n\n/**\n * Strategy function for loading features based on the view's extent and\n * resolution.\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @return {Array<import(\"./extent.js\").Extent>} Extents.\n * @api\n */\nexport function bbox(extent, resolution) {\n  return [extent];\n}\n\n\n/**\n * Creates a strategy function for loading features based on a tile grid.\n * @param {import(\"./tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n * @return {function(import(\"./extent.js\").Extent, number): Array<import(\"./extent.js\").Extent>} Loading strategy.\n * @api\n */\nexport function tile(tileGrid) {\n  return (\n    /**\n     * @param {import(\"./extent.js\").Extent} extent Extent.\n     * @param {number} resolution Resolution.\n     * @return {Array<import(\"./extent.js\").Extent>} Extents.\n     */\n    function(extent, resolution) {\n      var z = tileGrid.getZForResolution(resolution);\n      var tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z);\n      /** @type {Array<import(\"./extent.js\").Extent>} */\n      var extents = [];\n      /** @type {import(\"./tilecoord.js\").TileCoord} */\n      var tileCoord = [z, 0, 0];\n      for (tileCoord[1] = tileRange.minX; tileCoord[1] <= tileRange.maxX; ++tileCoord[1]) {\n        for (tileCoord[2] = tileRange.minY; tileCoord[2] <= tileRange.maxY; ++tileCoord[2]) {\n          extents.push(tileGrid.getTileCoordExtent(tileCoord));\n        }\n      }\n      return extents;\n    }\n  );\n}\n\n//# sourceMappingURL=loadingstrategy.js.map","/**\n * @module ol/layer/TileProperty\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  PRELOAD: 'preload',\n  USE_INTERIM_TILES_ON_ERROR: 'useInterimTilesOnError'\n};\n\n//# sourceMappingURL=TileProperty.js.map","/**\n * @module ol/layer/Tile\n */\nimport LayerType from '../LayerType.js';\nimport Layer from './Layer.js';\nimport TileProperty from './TileProperty.js';\nimport {assign} from '../obj.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {number} [preload=0] Preload. Load low-resolution tiles up to `preload` levels. `0`\n * means no preloading.\n * @property {import(\"../source/Tile.js\").default} [source] Source for this layer.\n * @property {import(\"../PluggableMap.js\").default} [map] Sets the layer as overlay on a map. The map will not manage\n * this layer in its layers collection, and the layer will be rendered on top. This is useful for\n * temporary layers. The standard way to add a layer to a map and have it managed by the map is to\n * use {@link module:ol/Map#addLayer}.\n * @property {boolean} [useInterimTilesOnError=true] Use interim tiles on error.\n */\n\n/**\n * @classdesc\n * For layer sources that provide pre-rendered, tiled images in grids that are\n * organized by zoom levels for specific resolutions.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @api\n */\nvar TileLayer = /*@__PURE__*/(function (Layer) {\n  function TileLayer(opt_options) {\n    var options = opt_options ? opt_options : {};\n\n    var baseOptions = assign({}, options);\n\n    delete baseOptions.preload;\n    delete baseOptions.useInterimTilesOnError;\n    Layer.call(this, baseOptions);\n\n    this.setPreload(options.preload !== undefined ? options.preload : 0);\n    this.setUseInterimTilesOnError(options.useInterimTilesOnError !== undefined ?\n      options.useInterimTilesOnError : true);\n\n    /**\n    * The layer type.\n    * @protected\n    * @type {import(\"../LayerType.js\").default}\n    */\n    this.type = LayerType.TILE;\n\n  }\n\n  if ( Layer ) TileLayer.__proto__ = Layer;\n  TileLayer.prototype = Object.create( Layer && Layer.prototype );\n  TileLayer.prototype.constructor = TileLayer;\n\n  /**\n  * Return the level as number to which we will preload tiles up to.\n  * @return {number} The level to preload tiles up to.\n  * @observable\n  * @api\n  */\n  TileLayer.prototype.getPreload = function getPreload () {\n    return /** @type {number} */ (this.get(TileProperty.PRELOAD));\n  };\n\n  /**\n  * Set the level as number to which we will preload tiles up to.\n  * @param {number} preload The level to preload tiles up to.\n  * @observable\n  * @api\n  */\n  TileLayer.prototype.setPreload = function setPreload (preload) {\n    this.set(TileProperty.PRELOAD, preload);\n  };\n\n  /**\n  * Whether we use interim tiles on error.\n  * @return {boolean} Use interim tiles on error.\n  * @observable\n  * @api\n  */\n  TileLayer.prototype.getUseInterimTilesOnError = function getUseInterimTilesOnError () {\n    return /** @type {boolean} */ (this.get(TileProperty.USE_INTERIM_TILES_ON_ERROR));\n  };\n\n  /**\n  * Set whether we use interim tiles on error.\n  * @param {boolean} useInterimTilesOnError Use interim tiles on error.\n  * @observable\n  * @api\n  */\n  TileLayer.prototype.setUseInterimTilesOnError = function setUseInterimTilesOnError (useInterimTilesOnError) {\n    this.set(TileProperty.USE_INTERIM_TILES_ON_ERROR, useInterimTilesOnError);\n  };\n\n  return TileLayer;\n}(Layer));\n\n\n/**\n * Return the associated {@link module:ol/source/Tile tilesource} of the layer.\n * @function\n * @return {import(\"../source/Tile.js\").default} Source.\n * @api\n */\nTileLayer.prototype.getSource;\n\n\nexport default TileLayer;\n\n//# sourceMappingURL=Tile.js.map","/**\n * @module ol/reproj\n */\nimport {createCanvasContext2D} from './dom.js';\nimport {containsCoordinate, createEmpty, extend, getHeight, getTopLeft, getWidth} from './extent.js';\nimport {solveLinearSystem} from './math.js';\nimport {getPointResolution, transform} from './proj.js';\n\n\n/**\n * Calculates ideal resolution to use from the source in order to achieve\n * pixel mapping as close as possible to 1:1 during reprojection.\n * The resolution is calculated regardless of what resolutions\n * are actually available in the dataset (TileGrid, Image, ...).\n *\n * @param {import(\"./proj/Projection.js\").default} sourceProj Source projection.\n * @param {import(\"./proj/Projection.js\").default} targetProj Target projection.\n * @param {import(\"./coordinate.js\").Coordinate} targetCenter Target center.\n * @param {number} targetResolution Target resolution.\n * @return {number} The best resolution to use. Can be +-Infinity, NaN or 0.\n */\nexport function calculateSourceResolution(sourceProj, targetProj,\n  targetCenter, targetResolution) {\n\n  var sourceCenter = transform(targetCenter, targetProj, sourceProj);\n\n  // calculate the ideal resolution of the source data\n  var sourceResolution = getPointResolution(targetProj, targetResolution, targetCenter);\n\n  var targetMetersPerUnit = targetProj.getMetersPerUnit();\n  if (targetMetersPerUnit !== undefined) {\n    sourceResolution *= targetMetersPerUnit;\n  }\n  var sourceMetersPerUnit = sourceProj.getMetersPerUnit();\n  if (sourceMetersPerUnit !== undefined) {\n    sourceResolution /= sourceMetersPerUnit;\n  }\n\n  // Based on the projection properties, the point resolution at the specified\n  // coordinates may be slightly different. We need to reverse-compensate this\n  // in order to achieve optimal results.\n\n  var sourceExtent = sourceProj.getExtent();\n  if (!sourceExtent || containsCoordinate(sourceExtent, sourceCenter)) {\n    var compensationFactor = getPointResolution(sourceProj, sourceResolution, sourceCenter) /\n        sourceResolution;\n    if (isFinite(compensationFactor) && compensationFactor > 0) {\n      sourceResolution /= compensationFactor;\n    }\n  }\n\n  return sourceResolution;\n}\n\n\n/**\n * Enlarge the clipping triangle point by 1 pixel to ensure the edges overlap\n * in order to mask gaps caused by antialiasing.\n *\n * @param {number} centroidX Centroid of the triangle (x coordinate in pixels).\n * @param {number} centroidY Centroid of the triangle (y coordinate in pixels).\n * @param {number} x X coordinate of the point (in pixels).\n * @param {number} y Y coordinate of the point (in pixels).\n * @return {import(\"./coordinate.js\").Coordinate} New point 1 px farther from the centroid.\n */\nfunction enlargeClipPoint(centroidX, centroidY, x, y) {\n  var dX = x - centroidX;\n  var dY = y - centroidY;\n  var distance = Math.sqrt(dX * dX + dY * dY);\n  return [Math.round(x + dX / distance), Math.round(y + dY / distance)];\n}\n\n\n/**\n * Renders the source data into new canvas based on the triangulation.\n *\n * @param {number} width Width of the canvas.\n * @param {number} height Height of the canvas.\n * @param {number} pixelRatio Pixel ratio.\n * @param {number} sourceResolution Source resolution.\n * @param {import(\"./extent.js\").Extent} sourceExtent Extent of the data source.\n * @param {number} targetResolution Target resolution.\n * @param {import(\"./extent.js\").Extent} targetExtent Target extent.\n * @param {import(\"./reproj/Triangulation.js\").default} triangulation\n * Calculated triangulation.\n * @param {Array<{extent: import(\"./extent.js\").Extent,\n *                 image: (HTMLCanvasElement|HTMLImageElement|HTMLVideoElement)}>} sources\n * Array of sources.\n * @param {number} gutter Gutter of the sources.\n * @param {boolean=} opt_renderEdges Render reprojection edges.\n * @return {HTMLCanvasElement} Canvas with reprojected data.\n */\nexport function render(width, height, pixelRatio,\n  sourceResolution, sourceExtent, targetResolution, targetExtent,\n  triangulation, sources, gutter, opt_renderEdges) {\n\n  var context = createCanvasContext2D(Math.round(pixelRatio * width),\n    Math.round(pixelRatio * height));\n\n  if (sources.length === 0) {\n    return context.canvas;\n  }\n\n  context.scale(pixelRatio, pixelRatio);\n\n  var sourceDataExtent = createEmpty();\n  sources.forEach(function(src, i, arr) {\n    extend(sourceDataExtent, src.extent);\n  });\n\n  var canvasWidthInUnits = getWidth(sourceDataExtent);\n  var canvasHeightInUnits = getHeight(sourceDataExtent);\n  var stitchContext = createCanvasContext2D(\n    Math.round(pixelRatio * canvasWidthInUnits / sourceResolution),\n    Math.round(pixelRatio * canvasHeightInUnits / sourceResolution));\n\n  var stitchScale = pixelRatio / sourceResolution;\n\n  sources.forEach(function(src, i, arr) {\n    var xPos = src.extent[0] - sourceDataExtent[0];\n    var yPos = -(src.extent[3] - sourceDataExtent[3]);\n    var srcWidth = getWidth(src.extent);\n    var srcHeight = getHeight(src.extent);\n\n    stitchContext.drawImage(\n      src.image,\n      gutter, gutter,\n      src.image.width - 2 * gutter, src.image.height - 2 * gutter,\n      xPos * stitchScale, yPos * stitchScale,\n      srcWidth * stitchScale, srcHeight * stitchScale);\n  });\n\n  var targetTopLeft = getTopLeft(targetExtent);\n\n  triangulation.getTriangles().forEach(function(triangle, i, arr) {\n    /* Calculate affine transform (src -> dst)\n     * Resulting matrix can be used to transform coordinate\n     * from `sourceProjection` to destination pixels.\n     *\n     * To optimize number of context calls and increase numerical stability,\n     * we also do the following operations:\n     * trans(-topLeftExtentCorner), scale(1 / targetResolution), scale(1, -1)\n     * here before solving the linear system so [ui, vi] are pixel coordinates.\n     *\n     * Src points: xi, yi\n     * Dst points: ui, vi\n     * Affine coefficients: aij\n     *\n     * | x0 y0 1  0  0 0 |   |a00|   |u0|\n     * | x1 y1 1  0  0 0 |   |a01|   |u1|\n     * | x2 y2 1  0  0 0 | x |a02| = |u2|\n     * |  0  0 0 x0 y0 1 |   |a10|   |v0|\n     * |  0  0 0 x1 y1 1 |   |a11|   |v1|\n     * |  0  0 0 x2 y2 1 |   |a12|   |v2|\n     */\n    var source = triangle.source;\n    var target = triangle.target;\n    var x0 = source[0][0], y0 = source[0][1];\n    var x1 = source[1][0], y1 = source[1][1];\n    var x2 = source[2][0], y2 = source[2][1];\n    var u0 = (target[0][0] - targetTopLeft[0]) / targetResolution;\n    var v0 = -(target[0][1] - targetTopLeft[1]) / targetResolution;\n    var u1 = (target[1][0] - targetTopLeft[0]) / targetResolution;\n    var v1 = -(target[1][1] - targetTopLeft[1]) / targetResolution;\n    var u2 = (target[2][0] - targetTopLeft[0]) / targetResolution;\n    var v2 = -(target[2][1] - targetTopLeft[1]) / targetResolution;\n\n    // Shift all the source points to improve numerical stability\n    // of all the subsequent calculations. The [x0, y0] is used here.\n    // This is also used to simplify the linear system.\n    var sourceNumericalShiftX = x0;\n    var sourceNumericalShiftY = y0;\n    x0 = 0;\n    y0 = 0;\n    x1 -= sourceNumericalShiftX;\n    y1 -= sourceNumericalShiftY;\n    x2 -= sourceNumericalShiftX;\n    y2 -= sourceNumericalShiftY;\n\n    var augmentedMatrix = [\n      [x1, y1, 0, 0, u1 - u0],\n      [x2, y2, 0, 0, u2 - u0],\n      [0, 0, x1, y1, v1 - v0],\n      [0, 0, x2, y2, v2 - v0]\n    ];\n    var affineCoefs = solveLinearSystem(augmentedMatrix);\n    if (!affineCoefs) {\n      return;\n    }\n\n    context.save();\n    context.beginPath();\n    var centroidX = (u0 + u1 + u2) / 3;\n    var centroidY = (v0 + v1 + v2) / 3;\n    var p0 = enlargeClipPoint(centroidX, centroidY, u0, v0);\n    var p1 = enlargeClipPoint(centroidX, centroidY, u1, v1);\n    var p2 = enlargeClipPoint(centroidX, centroidY, u2, v2);\n\n    context.moveTo(p1[0], p1[1]);\n    context.lineTo(p0[0], p0[1]);\n    context.lineTo(p2[0], p2[1]);\n    context.clip();\n\n    context.transform(\n      affineCoefs[0], affineCoefs[2], affineCoefs[1], affineCoefs[3], u0, v0);\n\n    context.translate(sourceDataExtent[0] - sourceNumericalShiftX,\n      sourceDataExtent[3] - sourceNumericalShiftY);\n\n    context.scale(sourceResolution / pixelRatio,\n      -sourceResolution / pixelRatio);\n\n    context.drawImage(stitchContext.canvas, 0, 0);\n    context.restore();\n  });\n\n  if (opt_renderEdges) {\n    context.save();\n\n    context.strokeStyle = 'black';\n    context.lineWidth = 1;\n\n    triangulation.getTriangles().forEach(function(triangle, i, arr) {\n      var target = triangle.target;\n      var u0 = (target[0][0] - targetTopLeft[0]) / targetResolution;\n      var v0 = -(target[0][1] - targetTopLeft[1]) / targetResolution;\n      var u1 = (target[1][0] - targetTopLeft[0]) / targetResolution;\n      var v1 = -(target[1][1] - targetTopLeft[1]) / targetResolution;\n      var u2 = (target[2][0] - targetTopLeft[0]) / targetResolution;\n      var v2 = -(target[2][1] - targetTopLeft[1]) / targetResolution;\n\n      context.beginPath();\n      context.moveTo(u1, v1);\n      context.lineTo(u0, v0);\n      context.lineTo(u2, v2);\n      context.closePath();\n      context.stroke();\n    });\n\n    context.restore();\n  }\n  return context.canvas;\n}\n\n//# sourceMappingURL=reproj.js.map","/**\n * @module ol/reproj/Triangulation\n */\nimport {boundingExtent, createEmpty, extendCoordinate, getBottomLeft, getBottomRight,\n  getTopLeft, getTopRight, getWidth, intersects} from '../extent.js';\nimport {modulo} from '../math.js';\nimport {getTransform} from '../proj.js';\n\n\n/**\n * Single triangle; consists of 3 source points and 3 target points.\n * @typedef {Object} Triangle\n * @property {Array<import(\"../coordinate.js\").Coordinate>} source\n * @property {Array<import(\"../coordinate.js\").Coordinate>} target\n */\n\n\n/**\n * Maximum number of subdivision steps during raster reprojection triangulation.\n * Prevents high memory usage and large number of proj4 calls (for certain\n * transformations and areas). At most `2*(2^this)` triangles are created for\n * each triangulated extent (tile/image).\n * @type {number}\n */\nvar MAX_SUBDIVISION = 10;\n\n\n/**\n * Maximum allowed size of triangle relative to world width. When transforming\n * corners of world extent between certain projections, the resulting\n * triangulation seems to have zero error and no subdivision is performed. If\n * the triangle width is more than this (relative to world width; 0-1),\n * subdivison is forced (up to `MAX_SUBDIVISION`). Default is `0.25`.\n * @type {number}\n */\nvar MAX_TRIANGLE_WIDTH = 0.25;\n\n\n/**\n * @classdesc\n * Class containing triangulation of the given target extent.\n * Used for determining source data and the reprojection itself.\n */\nvar Triangulation = function Triangulation(sourceProj, targetProj, targetExtent, maxSourceExtent, errorThreshold) {\n\n  /**\n   * @type {import(\"../proj/Projection.js\").default}\n   * @private\n   */\n  this.sourceProj_ = sourceProj;\n\n  /**\n   * @type {import(\"../proj/Projection.js\").default}\n   * @private\n   */\n  this.targetProj_ = targetProj;\n\n  /** @type {!Object<string, import(\"../coordinate.js\").Coordinate>} */\n  var transformInvCache = {};\n  var transformInv = getTransform(this.targetProj_, this.sourceProj_);\n\n  /**\n   * @param {import(\"../coordinate.js\").Coordinate} c A coordinate.\n   * @return {import(\"../coordinate.js\").Coordinate} Transformed coordinate.\n   * @private\n   */\n  this.transformInv_ = function(c) {\n    var key = c[0] + '/' + c[1];\n    if (!transformInvCache[key]) {\n      transformInvCache[key] = transformInv(c);\n    }\n    return transformInvCache[key];\n  };\n\n  /**\n   * @type {import(\"../extent.js\").Extent}\n   * @private\n   */\n  this.maxSourceExtent_ = maxSourceExtent;\n\n  /**\n   * @type {number}\n   * @private\n   */\n  this.errorThresholdSquared_ = errorThreshold * errorThreshold;\n\n  /**\n   * @type {Array<Triangle>}\n   * @private\n   */\n  this.triangles_ = [];\n\n  /**\n   * Indicates that the triangulation crosses edge of the source projection.\n   * @type {boolean}\n   * @private\n   */\n  this.wrapsXInSource_ = false;\n\n  /**\n   * @type {boolean}\n   * @private\n   */\n  this.canWrapXInSource_ = this.sourceProj_.canWrapX() &&\n      !!maxSourceExtent &&\n      !!this.sourceProj_.getExtent() &&\n      (getWidth(maxSourceExtent) == getWidth(this.sourceProj_.getExtent()));\n\n  /**\n   * @type {?number}\n   * @private\n   */\n  this.sourceWorldWidth_ = this.sourceProj_.getExtent() ?\n    getWidth(this.sourceProj_.getExtent()) : null;\n\n  /**\n   * @type {?number}\n   * @private\n   */\n  this.targetWorldWidth_ = this.targetProj_.getExtent() ?\n    getWidth(this.targetProj_.getExtent()) : null;\n\n  var destinationTopLeft = getTopLeft(targetExtent);\n  var destinationTopRight = getTopRight(targetExtent);\n  var destinationBottomRight = getBottomRight(targetExtent);\n  var destinationBottomLeft = getBottomLeft(targetExtent);\n  var sourceTopLeft = this.transformInv_(destinationTopLeft);\n  var sourceTopRight = this.transformInv_(destinationTopRight);\n  var sourceBottomRight = this.transformInv_(destinationBottomRight);\n  var sourceBottomLeft = this.transformInv_(destinationBottomLeft);\n\n  this.addQuad_(\n    destinationTopLeft, destinationTopRight,\n    destinationBottomRight, destinationBottomLeft,\n    sourceTopLeft, sourceTopRight, sourceBottomRight, sourceBottomLeft,\n    MAX_SUBDIVISION);\n\n  if (this.wrapsXInSource_) {\n    var leftBound = Infinity;\n    this.triangles_.forEach(function(triangle, i, arr) {\n      leftBound = Math.min(leftBound,\n        triangle.source[0][0], triangle.source[1][0], triangle.source[2][0]);\n    });\n\n    // Shift triangles to be as close to `leftBound` as possible\n    // (if the distance is more than `worldWidth / 2` it can be closer.\n    this.triangles_.forEach(function(triangle) {\n      if (Math.max(triangle.source[0][0], triangle.source[1][0],\n        triangle.source[2][0]) - leftBound > this.sourceWorldWidth_ / 2) {\n        var newTriangle = [[triangle.source[0][0], triangle.source[0][1]],\n          [triangle.source[1][0], triangle.source[1][1]],\n          [triangle.source[2][0], triangle.source[2][1]]];\n        if ((newTriangle[0][0] - leftBound) > this.sourceWorldWidth_ / 2) {\n          newTriangle[0][0] -= this.sourceWorldWidth_;\n        }\n        if ((newTriangle[1][0] - leftBound) > this.sourceWorldWidth_ / 2) {\n          newTriangle[1][0] -= this.sourceWorldWidth_;\n        }\n        if ((newTriangle[2][0] - leftBound) > this.sourceWorldWidth_ / 2) {\n          newTriangle[2][0] -= this.sourceWorldWidth_;\n        }\n\n        // Rarely (if the extent contains both the dateline and prime meridian)\n        // the shift can in turn break some triangles.\n        // Detect this here and don't shift in such cases.\n        var minX = Math.min(\n          newTriangle[0][0], newTriangle[1][0], newTriangle[2][0]);\n        var maxX = Math.max(\n          newTriangle[0][0], newTriangle[1][0], newTriangle[2][0]);\n        if ((maxX - minX) < this.sourceWorldWidth_ / 2) {\n          triangle.source = newTriangle;\n        }\n      }\n    }.bind(this));\n  }\n\n  transformInvCache = {};\n};\n\n/**\n * Adds triangle to the triangulation.\n * @param {import(\"../coordinate.js\").Coordinate} a The target a coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} b The target b coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} c The target c coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} aSrc The source a coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} bSrc The source b coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} cSrc The source c coordinate.\n * @private\n */\nTriangulation.prototype.addTriangle_ = function addTriangle_ (a, b, c, aSrc, bSrc, cSrc) {\n  this.triangles_.push({\n    source: [aSrc, bSrc, cSrc],\n    target: [a, b, c]\n  });\n};\n\n/**\n * Adds quad (points in clock-wise order) to the triangulation\n * (and reprojects the vertices) if valid.\n * Performs quad subdivision if needed to increase precision.\n *\n * @param {import(\"../coordinate.js\").Coordinate} a The target a coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} b The target b coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} c The target c coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} d The target d coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} aSrc The source a coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} bSrc The source b coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} cSrc The source c coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} dSrc The source d coordinate.\n * @param {number} maxSubdivision Maximal allowed subdivision of the quad.\n * @private\n */\nTriangulation.prototype.addQuad_ = function addQuad_ (a, b, c, d, aSrc, bSrc, cSrc, dSrc, maxSubdivision) {\n\n  var sourceQuadExtent = boundingExtent([aSrc, bSrc, cSrc, dSrc]);\n  var sourceCoverageX = this.sourceWorldWidth_ ?\n    getWidth(sourceQuadExtent) / this.sourceWorldWidth_ : null;\n  var sourceWorldWidth = /** @type {number} */ (this.sourceWorldWidth_);\n\n  // when the quad is wrapped in the source projection\n  // it covers most of the projection extent, but not fully\n  var wrapsX = this.sourceProj_.canWrapX() &&\n               sourceCoverageX > 0.5 && sourceCoverageX < 1;\n\n  var needsSubdivision = false;\n\n  if (maxSubdivision > 0) {\n    if (this.targetProj_.isGlobal() && this.targetWorldWidth_) {\n      var targetQuadExtent = boundingExtent([a, b, c, d]);\n      var targetCoverageX = getWidth(targetQuadExtent) / this.targetWorldWidth_;\n      needsSubdivision = targetCoverageX > MAX_TRIANGLE_WIDTH ||\n        needsSubdivision;\n    }\n    if (!wrapsX && this.sourceProj_.isGlobal() && sourceCoverageX) {\n      needsSubdivision = sourceCoverageX > MAX_TRIANGLE_WIDTH ||\n          needsSubdivision;\n    }\n  }\n\n  if (!needsSubdivision && this.maxSourceExtent_) {\n    if (!intersects(sourceQuadExtent, this.maxSourceExtent_)) {\n      // whole quad outside source projection extent -> ignore\n      return;\n    }\n  }\n\n  if (!needsSubdivision) {\n    if (!isFinite(aSrc[0]) || !isFinite(aSrc[1]) ||\n        !isFinite(bSrc[0]) || !isFinite(bSrc[1]) ||\n        !isFinite(cSrc[0]) || !isFinite(cSrc[1]) ||\n        !isFinite(dSrc[0]) || !isFinite(dSrc[1])) {\n      if (maxSubdivision > 0) {\n        needsSubdivision = true;\n      } else {\n        return;\n      }\n    }\n  }\n\n  if (maxSubdivision > 0) {\n    if (!needsSubdivision) {\n      var center = [(a[0] + c[0]) / 2, (a[1] + c[1]) / 2];\n      var centerSrc = this.transformInv_(center);\n\n      var dx;\n      if (wrapsX) {\n        var centerSrcEstimX =\n            (modulo(aSrc[0], sourceWorldWidth) +\n             modulo(cSrc[0], sourceWorldWidth)) / 2;\n        dx = centerSrcEstimX -\n            modulo(centerSrc[0], sourceWorldWidth);\n      } else {\n        dx = (aSrc[0] + cSrc[0]) / 2 - centerSrc[0];\n      }\n      var dy = (aSrc[1] + cSrc[1]) / 2 - centerSrc[1];\n      var centerSrcErrorSquared = dx * dx + dy * dy;\n      needsSubdivision = centerSrcErrorSquared > this.errorThresholdSquared_;\n    }\n    if (needsSubdivision) {\n      if (Math.abs(a[0] - c[0]) <= Math.abs(a[1] - c[1])) {\n        // split horizontally (top & bottom)\n        var bc = [(b[0] + c[0]) / 2, (b[1] + c[1]) / 2];\n        var bcSrc = this.transformInv_(bc);\n        var da = [(d[0] + a[0]) / 2, (d[1] + a[1]) / 2];\n        var daSrc = this.transformInv_(da);\n\n        this.addQuad_(\n          a, b, bc, da, aSrc, bSrc, bcSrc, daSrc, maxSubdivision - 1);\n        this.addQuad_(\n          da, bc, c, d, daSrc, bcSrc, cSrc, dSrc, maxSubdivision - 1);\n      } else {\n        // split vertically (left & right)\n        var ab = [(a[0] + b[0]) / 2, (a[1] + b[1]) / 2];\n        var abSrc = this.transformInv_(ab);\n        var cd = [(c[0] + d[0]) / 2, (c[1] + d[1]) / 2];\n        var cdSrc = this.transformInv_(cd);\n\n        this.addQuad_(\n          a, ab, cd, d, aSrc, abSrc, cdSrc, dSrc, maxSubdivision - 1);\n        this.addQuad_(\n          ab, b, c, cd, abSrc, bSrc, cSrc, cdSrc, maxSubdivision - 1);\n      }\n      return;\n    }\n  }\n\n  if (wrapsX) {\n    if (!this.canWrapXInSource_) {\n      return;\n    }\n    this.wrapsXInSource_ = true;\n  }\n\n  this.addTriangle_(a, c, d, aSrc, cSrc, dSrc);\n  this.addTriangle_(a, b, c, aSrc, bSrc, cSrc);\n};\n\n/**\n * Calculates extent of the 'source' coordinates from all the triangles.\n *\n * @return {import(\"../extent.js\").Extent} Calculated extent.\n */\nTriangulation.prototype.calculateSourceExtent = function calculateSourceExtent () {\n  var extent = createEmpty();\n\n  this.triangles_.forEach(function(triangle, i, arr) {\n    var src = triangle.source;\n    extendCoordinate(extent, src[0]);\n    extendCoordinate(extent, src[1]);\n    extendCoordinate(extent, src[2]);\n  });\n\n  return extent;\n};\n\n/**\n * @return {Array<Triangle>} Array of the calculated triangles.\n */\nTriangulation.prototype.getTriangles = function getTriangles () {\n  return this.triangles_;\n};\n\nexport default Triangulation;\n\n//# sourceMappingURL=Triangulation.js.map","/**\n * @module ol/reproj/Tile\n */\nimport {ERROR_THRESHOLD} from './common.js';\n\nimport Tile from '../Tile.js';\nimport TileState from '../TileState.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {getArea, getCenter, getIntersection} from '../extent.js';\nimport {clamp} from '../math.js';\nimport {calculateSourceResolution, render as renderReprojected} from '../reproj.js';\nimport Triangulation from './Triangulation.js';\n\n\n/**\n * @typedef {function(number, number, number, number) : import(\"../Tile.js\").default} FunctionType\n */\n\n\n/**\n * @classdesc\n * Class encapsulating single reprojected tile.\n * See {@link module:ol/source/TileImage~TileImage}.\n *\n */\nvar ReprojTile = /*@__PURE__*/(function (Tile) {\n  function ReprojTile(\n    sourceProj,\n    sourceTileGrid,\n    targetProj,\n    targetTileGrid,\n    tileCoord,\n    wrappedTileCoord,\n    pixelRatio,\n    gutter,\n    getTileFunction,\n    opt_errorThreshold,\n    opt_renderEdges\n  ) {\n    Tile.call(this, tileCoord, TileState.IDLE);\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.renderEdges_ = opt_renderEdges !== undefined ? opt_renderEdges : false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.pixelRatio_ = pixelRatio;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.gutter_ = gutter;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.canvas_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../tilegrid/TileGrid.js\").default}\n     */\n    this.sourceTileGrid_ = sourceTileGrid;\n\n    /**\n     * @private\n     * @type {import(\"../tilegrid/TileGrid.js\").default}\n     */\n    this.targetTileGrid_ = targetTileGrid;\n\n    /**\n     * @private\n     * @type {import(\"../tilecoord.js\").TileCoord}\n     */\n    this.wrappedTileCoord_ = wrappedTileCoord ? wrappedTileCoord : tileCoord;\n\n    /**\n     * @private\n     * @type {!Array<import(\"../Tile.js\").default>}\n     */\n    this.sourceTiles_ = [];\n\n    /**\n     * @private\n     * @type {Array<import(\"../events.js\").EventsKey>}\n     */\n    this.sourcesListenerKeys_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.sourceZ_ = 0;\n\n    var targetExtent = targetTileGrid.getTileCoordExtent(this.wrappedTileCoord_);\n    var maxTargetExtent = this.targetTileGrid_.getExtent();\n    var maxSourceExtent = this.sourceTileGrid_.getExtent();\n\n    var limitedTargetExtent = maxTargetExtent ?\n      getIntersection(targetExtent, maxTargetExtent) : targetExtent;\n\n    if (getArea(limitedTargetExtent) === 0) {\n      // Tile is completely outside range -> EMPTY\n      // TODO: is it actually correct that the source even creates the tile ?\n      this.state = TileState.EMPTY;\n      return;\n    }\n\n    var sourceProjExtent = sourceProj.getExtent();\n    if (sourceProjExtent) {\n      if (!maxSourceExtent) {\n        maxSourceExtent = sourceProjExtent;\n      } else {\n        maxSourceExtent = getIntersection(maxSourceExtent, sourceProjExtent);\n      }\n    }\n\n    var targetResolution = targetTileGrid.getResolution(\n      this.wrappedTileCoord_[0]);\n\n    var targetCenter = getCenter(limitedTargetExtent);\n    var sourceResolution = calculateSourceResolution(\n      sourceProj, targetProj, targetCenter, targetResolution);\n\n    if (!isFinite(sourceResolution) || sourceResolution <= 0) {\n      // invalid sourceResolution -> EMPTY\n      // probably edges of the projections when no extent is defined\n      this.state = TileState.EMPTY;\n      return;\n    }\n\n    var errorThresholdInPixels = opt_errorThreshold !== undefined ?\n      opt_errorThreshold : ERROR_THRESHOLD;\n\n    /**\n     * @private\n     * @type {!import(\"./Triangulation.js\").default}\n     */\n    this.triangulation_ = new Triangulation(\n      sourceProj, targetProj, limitedTargetExtent, maxSourceExtent,\n      sourceResolution * errorThresholdInPixels);\n\n    if (this.triangulation_.getTriangles().length === 0) {\n      // no valid triangles -> EMPTY\n      this.state = TileState.EMPTY;\n      return;\n    }\n\n    this.sourceZ_ = sourceTileGrid.getZForResolution(sourceResolution);\n    var sourceExtent = this.triangulation_.calculateSourceExtent();\n\n    if (maxSourceExtent) {\n      if (sourceProj.canWrapX()) {\n        sourceExtent[1] = clamp(\n          sourceExtent[1], maxSourceExtent[1], maxSourceExtent[3]);\n        sourceExtent[3] = clamp(\n          sourceExtent[3], maxSourceExtent[1], maxSourceExtent[3]);\n      } else {\n        sourceExtent = getIntersection(sourceExtent, maxSourceExtent);\n      }\n    }\n\n    if (!getArea(sourceExtent)) {\n      this.state = TileState.EMPTY;\n    } else {\n      var sourceRange = sourceTileGrid.getTileRangeForExtentAndZ(\n        sourceExtent, this.sourceZ_);\n\n      for (var srcX = sourceRange.minX; srcX <= sourceRange.maxX; srcX++) {\n        for (var srcY = sourceRange.minY; srcY <= sourceRange.maxY; srcY++) {\n          var tile = getTileFunction(this.sourceZ_, srcX, srcY, pixelRatio);\n          if (tile) {\n            this.sourceTiles_.push(tile);\n          }\n        }\n      }\n\n      if (this.sourceTiles_.length === 0) {\n        this.state = TileState.EMPTY;\n      }\n    }\n  }\n\n  if ( Tile ) ReprojTile.__proto__ = Tile;\n  ReprojTile.prototype = Object.create( Tile && Tile.prototype );\n  ReprojTile.prototype.constructor = ReprojTile;\n\n  /**\n   * @inheritDoc\n   */\n  ReprojTile.prototype.disposeInternal = function disposeInternal () {\n    if (this.state == TileState.LOADING) {\n      this.unlistenSources_();\n    }\n    Tile.prototype.disposeInternal.call(this);\n  };\n\n  /**\n   * Get the HTML Canvas element for this tile.\n   * @return {HTMLCanvasElement} Canvas.\n   */\n  ReprojTile.prototype.getImage = function getImage () {\n    return this.canvas_;\n  };\n\n  /**\n   * @private\n   */\n  ReprojTile.prototype.reproject_ = function reproject_ () {\n    var sources = [];\n    this.sourceTiles_.forEach(function(tile, i, arr) {\n      if (tile && tile.getState() == TileState.LOADED) {\n        sources.push({\n          extent: this.sourceTileGrid_.getTileCoordExtent(tile.tileCoord),\n          image: tile.getImage()\n        });\n      }\n    }.bind(this));\n    this.sourceTiles_.length = 0;\n\n    if (sources.length === 0) {\n      this.state = TileState.ERROR;\n    } else {\n      var z = this.wrappedTileCoord_[0];\n      var size = this.targetTileGrid_.getTileSize(z);\n      var width = typeof size === 'number' ? size : size[0];\n      var height = typeof size === 'number' ? size : size[1];\n      var targetResolution = this.targetTileGrid_.getResolution(z);\n      var sourceResolution = this.sourceTileGrid_.getResolution(this.sourceZ_);\n\n      var targetExtent = this.targetTileGrid_.getTileCoordExtent(\n        this.wrappedTileCoord_);\n      this.canvas_ = renderReprojected(width, height, this.pixelRatio_,\n        sourceResolution, this.sourceTileGrid_.getExtent(),\n        targetResolution, targetExtent, this.triangulation_, sources,\n        this.gutter_, this.renderEdges_);\n\n      this.state = TileState.LOADED;\n    }\n    this.changed();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  ReprojTile.prototype.load = function load () {\n    if (this.state == TileState.IDLE) {\n      this.state = TileState.LOADING;\n      this.changed();\n\n      var leftToLoad = 0;\n\n      this.sourcesListenerKeys_ = [];\n      this.sourceTiles_.forEach(function(tile, i, arr) {\n        var state = tile.getState();\n        if (state == TileState.IDLE || state == TileState.LOADING) {\n          leftToLoad++;\n\n          var sourceListenKey = listen(tile, EventType.CHANGE,\n            function(e) {\n              var state = tile.getState();\n              if (state == TileState.LOADED ||\n                    state == TileState.ERROR ||\n                    state == TileState.EMPTY) {\n                unlistenByKey(sourceListenKey);\n                leftToLoad--;\n                if (leftToLoad === 0) {\n                  this.unlistenSources_();\n                  this.reproject_();\n                }\n              }\n            }, this);\n          this.sourcesListenerKeys_.push(sourceListenKey);\n        }\n      }.bind(this));\n\n      this.sourceTiles_.forEach(function(tile, i, arr) {\n        var state = tile.getState();\n        if (state == TileState.IDLE) {\n          tile.load();\n        }\n      });\n\n      if (leftToLoad === 0) {\n        setTimeout(this.reproject_.bind(this), 0);\n      }\n    }\n  };\n\n  /**\n   * @private\n   */\n  ReprojTile.prototype.unlistenSources_ = function unlistenSources_ () {\n    this.sourcesListenerKeys_.forEach(unlistenByKey);\n    this.sourcesListenerKeys_ = null;\n  };\n\n  return ReprojTile;\n}(Tile));\n\n\nexport default ReprojTile;\n\n//# sourceMappingURL=Tile.js.map","/**\n * @module ol/tileurlfunction\n */\nimport {assert} from './asserts.js';\nimport {modulo} from './math.js';\nimport {hash as tileCoordHash} from './tilecoord.js';\n\n\n/**\n * @param {string} template Template.\n * @param {import(\"./tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n * @return {import(\"./Tile.js\").UrlFunction} Tile URL function.\n */\nexport function createFromTemplate(template, tileGrid) {\n  var zRegEx = /\\{z\\}/g;\n  var xRegEx = /\\{x\\}/g;\n  var yRegEx = /\\{y\\}/g;\n  var dashYRegEx = /\\{-y\\}/g;\n  return (\n    /**\n     * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile Coordinate.\n     * @param {number} pixelRatio Pixel ratio.\n     * @param {import(\"./proj/Projection.js\").default} projection Projection.\n     * @return {string|undefined} Tile URL.\n     */\n    function(tileCoord, pixelRatio, projection) {\n      if (!tileCoord) {\n        return undefined;\n      } else {\n        return template.replace(zRegEx, tileCoord[0].toString())\n          .replace(xRegEx, tileCoord[1].toString())\n          .replace(yRegEx, function() {\n            var y = -tileCoord[2] - 1;\n            return y.toString();\n          })\n          .replace(dashYRegEx, function() {\n            var z = tileCoord[0];\n            var range = tileGrid.getFullTileRange(z);\n            assert(range, 55); // The {-y} placeholder requires a tile grid with extent\n            var y = range.getHeight() + tileCoord[2];\n            return y.toString();\n          });\n      }\n    }\n  );\n}\n\n\n/**\n * @param {Array<string>} templates Templates.\n * @param {import(\"./tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n * @return {import(\"./Tile.js\").UrlFunction} Tile URL function.\n */\nexport function createFromTemplates(templates, tileGrid) {\n  var len = templates.length;\n  var tileUrlFunctions = new Array(len);\n  for (var i = 0; i < len; ++i) {\n    tileUrlFunctions[i] = createFromTemplate(templates[i], tileGrid);\n  }\n  return createFromTileUrlFunctions(tileUrlFunctions);\n}\n\n\n/**\n * @param {Array<import(\"./Tile.js\").UrlFunction>} tileUrlFunctions Tile URL Functions.\n * @return {import(\"./Tile.js\").UrlFunction} Tile URL function.\n */\nexport function createFromTileUrlFunctions(tileUrlFunctions) {\n  if (tileUrlFunctions.length === 1) {\n    return tileUrlFunctions[0];\n  }\n  return (\n    /**\n     * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile Coordinate.\n     * @param {number} pixelRatio Pixel ratio.\n     * @param {import(\"./proj/Projection.js\").default} projection Projection.\n     * @return {string|undefined} Tile URL.\n     */\n    function(tileCoord, pixelRatio, projection) {\n      if (!tileCoord) {\n        return undefined;\n      } else {\n        var h = tileCoordHash(tileCoord);\n        var index = modulo(h, tileUrlFunctions.length);\n        return tileUrlFunctions[index](tileCoord, pixelRatio, projection);\n      }\n    }\n  );\n}\n\n\n/**\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @return {string|undefined} Tile URL.\n */\nexport function nullTileUrlFunction(tileCoord, pixelRatio, projection) {\n  return undefined;\n}\n\n\n/**\n * @param {string} url URL.\n * @return {Array<string>} Array of urls.\n */\nexport function expandUrl(url) {\n  var urls = [];\n  var match = /\\{([a-z])-([a-z])\\}/.exec(url);\n  if (match) {\n    // char range\n    var startCharCode = match[1].charCodeAt(0);\n    var stopCharCode = match[2].charCodeAt(0);\n    var charCode;\n    for (charCode = startCharCode; charCode <= stopCharCode; ++charCode) {\n      urls.push(url.replace(match[0], String.fromCharCode(charCode)));\n    }\n    return urls;\n  }\n  match = match = /\\{(\\d+)-(\\d+)\\}/.exec(url);\n  if (match) {\n    // number range\n    var stop = parseInt(match[2], 10);\n    for (var i = parseInt(match[1], 10); i <= stop; i++) {\n      urls.push(url.replace(match[0], i.toString()));\n    }\n    return urls;\n  }\n  urls.push(url);\n  return urls;\n}\n\n//# sourceMappingURL=tileurlfunction.js.map","/**\n * @module ol/source/TileEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n\n  /**\n   * Triggered when a tile starts loading.\n   * @event module:ol/source/Tile.TileSourceEvent#tileloadstart\n   * @api\n   */\n  TILELOADSTART: 'tileloadstart',\n\n  /**\n   * Triggered when a tile finishes loading, either when its data is loaded,\n   * or when loading was aborted because the tile is no longer needed.\n   * @event module:ol/source/Tile.TileSourceEvent#tileloadend\n   * @api\n   */\n  TILELOADEND: 'tileloadend',\n\n  /**\n   * Triggered if tile loading results in an error.\n   * @event module:ol/source/Tile.TileSourceEvent#tileloaderror\n   * @api\n   */\n  TILELOADERROR: 'tileloaderror'\n\n};\n\n//# sourceMappingURL=TileEventType.js.map","/**\n * @module ol/source/UrlTile\n */\nimport {getUid} from '../util.js';\nimport TileState from '../TileState.js';\nimport {expandUrl, createFromTemplates, nullTileUrlFunction} from '../tileurlfunction.js';\nimport TileSource, {TileSourceEvent} from './Tile.js';\nimport TileEventType from './TileEventType.js';\nimport {getKeyZXY} from '../tilecoord.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions]\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize]\n * @property {boolean} [opaque]\n * @property {import(\"../proj.js\").ProjectionLike} [projection]\n * @property {import(\"./State.js\").default} [state]\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid]\n * @property {import(\"../Tile.js\").LoadFunction} tileLoadFunction\n * @property {number} [tilePixelRatio]\n * @property {import(\"../Tile.js\").UrlFunction} [tileUrlFunction]\n * @property {string} [url]\n * @property {Array<string>} [urls]\n * @property {boolean} [wrapX=true]\n * @property {number} [transition]\n * @property {string} [key]\n */\n\n\n/**\n * @classdesc\n * Base class for sources providing tiles divided into a tile grid over http.\n *\n * @fires import(\"./Tile.js\").TileSourceEvent\n */\nvar UrlTile = /*@__PURE__*/(function (TileSource) {\n  function UrlTile(options) {\n\n    TileSource.call(this, {\n      attributions: options.attributions,\n      cacheSize: options.cacheSize,\n      opaque: options.opaque,\n      projection: options.projection,\n      state: options.state,\n      tileGrid: options.tileGrid,\n      tilePixelRatio: options.tilePixelRatio,\n      wrapX: options.wrapX,\n      transition: options.transition,\n      key: options.key,\n      attributionsCollapsible: options.attributionsCollapsible\n    });\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.generateTileUrlFunction_ = !options.tileUrlFunction;\n\n    /**\n     * @protected\n     * @type {import(\"../Tile.js\").LoadFunction}\n     */\n    this.tileLoadFunction = options.tileLoadFunction;\n\n    /**\n     * @protected\n     * @type {import(\"../Tile.js\").UrlFunction}\n     */\n    this.tileUrlFunction = options.tileUrlFunction ? options.tileUrlFunction.bind(this) : nullTileUrlFunction;\n\n    /**\n     * @protected\n     * @type {!Array<string>|null}\n     */\n    this.urls = null;\n\n    if (options.urls) {\n      this.setUrls(options.urls);\n    } else if (options.url) {\n      this.setUrl(options.url);\n    }\n\n    if (options.tileUrlFunction) {\n      this.setTileUrlFunction(options.tileUrlFunction, this.key_);\n    }\n\n    /**\n     * @private\n     * @type {!Object<string, boolean>}\n     */\n    this.tileLoadingKeys_ = {};\n\n  }\n\n  if ( TileSource ) UrlTile.__proto__ = TileSource;\n  UrlTile.prototype = Object.create( TileSource && TileSource.prototype );\n  UrlTile.prototype.constructor = UrlTile;\n\n  /**\n   * Return the tile load function of the source.\n   * @return {import(\"../Tile.js\").LoadFunction} TileLoadFunction\n   * @api\n   */\n  UrlTile.prototype.getTileLoadFunction = function getTileLoadFunction () {\n    return this.tileLoadFunction;\n  };\n\n  /**\n   * Return the tile URL function of the source.\n   * @return {import(\"../Tile.js\").UrlFunction} TileUrlFunction\n   * @api\n   */\n  UrlTile.prototype.getTileUrlFunction = function getTileUrlFunction () {\n    return this.tileUrlFunction;\n  };\n\n  /**\n   * Return the URLs used for this source.\n   * When a tileUrlFunction is used instead of url or urls,\n   * null will be returned.\n   * @return {!Array<string>|null} URLs.\n   * @api\n   */\n  UrlTile.prototype.getUrls = function getUrls () {\n    return this.urls;\n  };\n\n  /**\n   * Handle tile change events.\n   * @param {import(\"../events/Event.js\").default} event Event.\n   * @protected\n   */\n  UrlTile.prototype.handleTileChange = function handleTileChange (event) {\n    var tile = /** @type {import(\"../Tile.js\").default} */ (event.target);\n    var uid = getUid(tile);\n    var tileState = tile.getState();\n    var type;\n    if (tileState == TileState.LOADING) {\n      this.tileLoadingKeys_[uid] = true;\n      type = TileEventType.TILELOADSTART;\n    } else if (uid in this.tileLoadingKeys_) {\n      delete this.tileLoadingKeys_[uid];\n      type = tileState == TileState.ERROR ? TileEventType.TILELOADERROR :\n        (tileState == TileState.LOADED || tileState == TileState.ABORT) ?\n          TileEventType.TILELOADEND : undefined;\n    }\n    if (type != undefined) {\n      this.dispatchEvent(new TileSourceEvent(type, tile));\n    }\n  };\n\n  /**\n   * Set the tile load function of the source.\n   * @param {import(\"../Tile.js\").LoadFunction} tileLoadFunction Tile load function.\n   * @api\n   */\n  UrlTile.prototype.setTileLoadFunction = function setTileLoadFunction (tileLoadFunction) {\n    this.tileCache.clear();\n    this.tileLoadFunction = tileLoadFunction;\n    this.changed();\n  };\n\n  /**\n   * Set the tile URL function of the source.\n   * @param {import(\"../Tile.js\").UrlFunction} tileUrlFunction Tile URL function.\n   * @param {string=} key Optional new tile key for the source.\n   * @api\n   */\n  UrlTile.prototype.setTileUrlFunction = function setTileUrlFunction (tileUrlFunction, key) {\n    this.tileUrlFunction = tileUrlFunction;\n    this.tileCache.pruneExceptNewestZ();\n    if (typeof key !== 'undefined') {\n      this.setKey(key);\n    } else {\n      this.changed();\n    }\n  };\n\n  /**\n   * Set the URL to use for requests.\n   * @param {string} url URL.\n   * @api\n   */\n  UrlTile.prototype.setUrl = function setUrl (url) {\n    var urls = this.urls = expandUrl(url);\n    this.setUrls(urls);\n  };\n\n  /**\n   * Set the URLs to use for requests.\n   * @param {Array<string>} urls URLs.\n   * @api\n   */\n  UrlTile.prototype.setUrls = function setUrls (urls) {\n    this.urls = urls;\n    var key = urls.join('\\n');\n    if (this.generateTileUrlFunction_) {\n      this.setTileUrlFunction(createFromTemplates(urls, this.tileGrid), key);\n    } else {\n      this.setKey(key);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  UrlTile.prototype.useTile = function useTile (z, x, y) {\n    var tileCoordKey = getKeyZXY(z, x, y);\n    if (this.tileCache.containsKey(tileCoordKey)) {\n      this.tileCache.get(tileCoordKey);\n    }\n  };\n\n  return UrlTile;\n}(TileSource));\n\n\nexport default UrlTile;\n\n//# sourceMappingURL=UrlTile.js.map","/**\n * @module ol/source/TileImage\n */\nimport {ENABLE_RASTER_REPROJECTION} from '../reproj/common.js';\nimport {getUid} from '../util.js';\nimport ImageTile from '../ImageTile.js';\nimport TileCache from '../TileCache.js';\nimport TileState from '../TileState.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {equivalent, get as getProjection} from '../proj.js';\nimport ReprojTile from '../reproj/Tile.js';\nimport UrlTile from './UrlTile.js';\nimport {getKey, getKeyZXY} from '../tilecoord.js';\nimport {getForProjection as getTileGridForProjection} from '../tilegrid.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize=2048] Cache size.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that\n * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to\n * access pixel data with the Canvas renderer.  See\n * https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [opaque=true] Whether the layer is opaque.\n * @property {import(\"../proj.js\").ProjectionLike} projection Projection.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {import(\"./State.js\").default} [state] Source state.\n * @property {typeof import(\"../ImageTile.js\").default} [tileClass] Class used to instantiate image tiles.\n * Default is {@link module:ol/ImageTile~ImageTile}.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] Tile grid.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n *   imageTile.getImage().src = src;\n * };\n * ```\n * @property {number} [tilePixelRatio=1] The pixel ratio used by the tile service. For example, if the tile\n * service advertizes 256px by 256px tiles but actually sends 512px\n * by 512px images (for retina/hidpi devices) then `tilePixelRatio`\n * should be set to `2`.\n * @property {import(\"../Tile.js\").UrlFunction} [tileUrlFunction] Optional function to get tile URL given a tile coordinate and the projection.\n * @property {string} [url] URL template. Must include `{x}`, `{y}` or `{-y}`, and `{z}` placeholders.\n * A `{?-?}` template pattern, for example `subdomain{a-f}.domain.com`, may be\n * used instead of defining each one separately in the `urls` option.\n * @property {Array<string>} [urls] An array of URL templates.\n * @property {boolean} [wrapX] Whether to wrap the world horizontally. The default, is to\n * request out-of-bounds tiles from the server. When set to `false`, only one\n * world will be rendered. When set to `true`, tiles will be requested for one\n * world only, but they will be wrapped horizontally to render multiple worlds.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {string} [key] Optional tile key for proper cache fetching\n */\n\n\n/**\n * @classdesc\n * Base class for sources providing images divided into a tile grid.\n *\n * @fires import(\"./Tile.js\").TileSourceEvent\n * @api\n */\nvar TileImage = /*@__PURE__*/(function (UrlTile) {\n  function TileImage(options) {\n\n    UrlTile.call(this, {\n      attributions: options.attributions,\n      cacheSize: options.cacheSize,\n      opaque: options.opaque,\n      projection: options.projection,\n      state: options.state,\n      tileGrid: options.tileGrid,\n      tileLoadFunction: options.tileLoadFunction ?\n        options.tileLoadFunction : defaultTileLoadFunction,\n      tilePixelRatio: options.tilePixelRatio,\n      tileUrlFunction: options.tileUrlFunction,\n      url: options.url,\n      urls: options.urls,\n      wrapX: options.wrapX,\n      transition: options.transition,\n      key: options.key,\n      attributionsCollapsible: options.attributionsCollapsible\n    });\n\n    /**\n     * @protected\n     * @type {?string}\n     */\n    this.crossOrigin =\n        options.crossOrigin !== undefined ? options.crossOrigin : null;\n\n    /**\n     * @protected\n     * @type {typeof ImageTile}\n     */\n    this.tileClass = options.tileClass !== undefined ?\n      options.tileClass : ImageTile;\n\n    /**\n     * @protected\n     * @type {!Object<string, TileCache>}\n     */\n    this.tileCacheForProjection = {};\n\n    /**\n     * @protected\n     * @type {!Object<string, import(\"../tilegrid/TileGrid.js\").default>}\n     */\n    this.tileGridForProjection = {};\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.reprojectionErrorThreshold_ = options.reprojectionErrorThreshold;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.renderReprojectionEdges_ = false;\n  }\n\n  if ( UrlTile ) TileImage.__proto__ = UrlTile;\n  TileImage.prototype = Object.create( UrlTile && UrlTile.prototype );\n  TileImage.prototype.constructor = TileImage;\n\n  /**\n   * @inheritDoc\n   */\n  TileImage.prototype.canExpireCache = function canExpireCache () {\n    if (!ENABLE_RASTER_REPROJECTION) {\n      return UrlTile.prototype.canExpireCache.call(this);\n    }\n    if (this.tileCache.canExpireCache()) {\n      return true;\n    } else {\n      for (var key in this.tileCacheForProjection) {\n        if (this.tileCacheForProjection[key].canExpireCache()) {\n          return true;\n        }\n      }\n    }\n    return false;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  TileImage.prototype.expireCache = function expireCache (projection, usedTiles) {\n    if (!ENABLE_RASTER_REPROJECTION) {\n      UrlTile.prototype.expireCache.call(this, projection, usedTiles);\n      return;\n    }\n    var usedTileCache = this.getTileCacheForProjection(projection);\n\n    this.tileCache.expireCache(this.tileCache == usedTileCache ? usedTiles : {});\n    for (var id in this.tileCacheForProjection) {\n      var tileCache = this.tileCacheForProjection[id];\n      tileCache.expireCache(tileCache == usedTileCache ? usedTiles : {});\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  TileImage.prototype.getGutterForProjection = function getGutterForProjection (projection) {\n    if (ENABLE_RASTER_REPROJECTION &&\n        this.getProjection() && projection && !equivalent(this.getProjection(), projection)) {\n      return 0;\n    } else {\n      return this.getGutter();\n    }\n  };\n\n  /**\n   * @return {number} Gutter.\n   */\n  TileImage.prototype.getGutter = function getGutter () {\n    return 0;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  TileImage.prototype.getOpaque = function getOpaque (projection) {\n    if (ENABLE_RASTER_REPROJECTION &&\n        this.getProjection() && projection && !equivalent(this.getProjection(), projection)) {\n      return false;\n    } else {\n      return UrlTile.prototype.getOpaque.call(this, projection);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  TileImage.prototype.getTileGridForProjection = function getTileGridForProjection$1 (projection) {\n    if (!ENABLE_RASTER_REPROJECTION) {\n      return UrlTile.prototype.getTileGridForProjection.call(this, projection);\n    }\n    var thisProj = this.getProjection();\n    if (this.tileGrid && (!thisProj || equivalent(thisProj, projection))) {\n      return this.tileGrid;\n    } else {\n      var projKey = getUid(projection);\n      if (!(projKey in this.tileGridForProjection)) {\n        this.tileGridForProjection[projKey] = getTileGridForProjection(projection);\n      }\n      return (\n        /** @type {!import(\"../tilegrid/TileGrid.js\").default} */ (this.tileGridForProjection[projKey])\n      );\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  TileImage.prototype.getTileCacheForProjection = function getTileCacheForProjection (projection) {\n    if (!ENABLE_RASTER_REPROJECTION) {\n      return UrlTile.prototype.getTileCacheForProjection.call(this, projection);\n    }\n    var thisProj = this.getProjection(); if (!thisProj || equivalent(thisProj, projection)) {\n      return this.tileCache;\n    } else {\n      var projKey = getUid(projection);\n      if (!(projKey in this.tileCacheForProjection)) {\n        this.tileCacheForProjection[projKey] = new TileCache(this.tileCache.highWaterMark);\n      }\n      return this.tileCacheForProjection[projKey];\n    }\n  };\n\n  /**\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @param {string} key The key set on the tile.\n   * @return {!import(\"../Tile.js\").default} Tile.\n   * @private\n   */\n  TileImage.prototype.createTile_ = function createTile_ (z, x, y, pixelRatio, projection, key) {\n    var tileCoord = [z, x, y];\n    var urlTileCoord = this.getTileCoordForTileUrlFunction(\n      tileCoord, projection);\n    var tileUrl = urlTileCoord ?\n      this.tileUrlFunction(urlTileCoord, pixelRatio, projection) : undefined;\n    var tile = new this.tileClass(\n      tileCoord,\n      tileUrl !== undefined ? TileState.IDLE : TileState.EMPTY,\n      tileUrl !== undefined ? tileUrl : '',\n      this.crossOrigin,\n      this.tileLoadFunction,\n      this.tileOptions);\n    tile.key = key;\n    listen(tile, EventType.CHANGE,\n      this.handleTileChange, this);\n    return tile;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  TileImage.prototype.getTile = function getTile (z, x, y, pixelRatio, projection) {\n    var sourceProjection = /** @type {!import(\"../proj/Projection.js\").default} */ (this.getProjection());\n    if (!ENABLE_RASTER_REPROJECTION ||\n        !sourceProjection || !projection || equivalent(sourceProjection, projection)) {\n      return this.getTileInternal(z, x, y, pixelRatio, sourceProjection || projection);\n    } else {\n      var cache = this.getTileCacheForProjection(projection);\n      var tileCoord = [z, x, y];\n      var tile;\n      var tileCoordKey = getKey(tileCoord);\n      if (cache.containsKey(tileCoordKey)) {\n        tile = /** @type {!import(\"../Tile.js\").default} */ (cache.get(tileCoordKey));\n      }\n      var key = this.getKey();\n      if (tile && tile.key == key) {\n        return tile;\n      } else {\n        var sourceTileGrid = this.getTileGridForProjection(sourceProjection);\n        var targetTileGrid = this.getTileGridForProjection(projection);\n        var wrappedTileCoord =\n            this.getTileCoordForTileUrlFunction(tileCoord, projection);\n        var newTile = new ReprojTile(\n          sourceProjection, sourceTileGrid,\n          projection, targetTileGrid,\n          tileCoord, wrappedTileCoord, this.getTilePixelRatio(pixelRatio),\n          this.getGutter(),\n          function(z, x, y, pixelRatio) {\n            return this.getTileInternal(z, x, y, pixelRatio, sourceProjection);\n          }.bind(this), this.reprojectionErrorThreshold_,\n          this.renderReprojectionEdges_);\n        newTile.key = key;\n\n        if (tile) {\n          newTile.interimTile = tile;\n          newTile.refreshInterimChain();\n          cache.replace(tileCoordKey, newTile);\n        } else {\n          cache.set(tileCoordKey, newTile);\n        }\n        return newTile;\n      }\n    }\n  };\n\n  /**\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {!import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {!import(\"../Tile.js\").default} Tile.\n   * @protected\n   */\n  TileImage.prototype.getTileInternal = function getTileInternal (z, x, y, pixelRatio, projection) {\n    var tile = null;\n    var tileCoordKey = getKeyZXY(z, x, y);\n    var key = this.getKey();\n    if (!this.tileCache.containsKey(tileCoordKey)) {\n      tile = this.createTile_(z, x, y, pixelRatio, projection, key);\n      this.tileCache.set(tileCoordKey, tile);\n    } else {\n      tile = this.tileCache.get(tileCoordKey);\n      if (tile.key != key) {\n        // The source's params changed. If the tile has an interim tile and if we\n        // can use it then we use it. Otherwise we create a new tile.  In both\n        // cases we attempt to assign an interim tile to the new tile.\n        var interimTile = tile;\n        tile = this.createTile_(z, x, y, pixelRatio, projection, key);\n\n        //make the new tile the head of the list,\n        if (interimTile.getState() == TileState.IDLE) {\n          //the old tile hasn't begun loading yet, and is now outdated, so we can simply discard it\n          tile.interimTile = interimTile.interimTile;\n        } else {\n          tile.interimTile = interimTile;\n        }\n        tile.refreshInterimChain();\n        this.tileCache.replace(tileCoordKey, tile);\n      }\n    }\n    return tile;\n  };\n\n  /**\n   * Sets whether to render reprojection edges or not (usually for debugging).\n   * @param {boolean} render Render the edges.\n   * @api\n   */\n  TileImage.prototype.setRenderReprojectionEdges = function setRenderReprojectionEdges (render) {\n    if (!ENABLE_RASTER_REPROJECTION ||\n        this.renderReprojectionEdges_ == render) {\n      return;\n    }\n    this.renderReprojectionEdges_ = render;\n    for (var id in this.tileCacheForProjection) {\n      this.tileCacheForProjection[id].clear();\n    }\n    this.changed();\n  };\n\n  /**\n   * Sets the tile grid to use when reprojecting the tiles to the given\n   * projection instead of the default tile grid for the projection.\n   *\n   * This can be useful when the default tile grid cannot be created\n   * (e.g. projection has no extent defined) or\n   * for optimization reasons (custom tile size, resolutions, ...).\n   *\n   * @param {import(\"../proj.js\").ProjectionLike} projection Projection.\n   * @param {import(\"../tilegrid/TileGrid.js\").default} tilegrid Tile grid to use for the projection.\n   * @api\n   */\n  TileImage.prototype.setTileGridForProjection = function setTileGridForProjection (projection, tilegrid) {\n    if (ENABLE_RASTER_REPROJECTION) {\n      var proj = getProjection(projection);\n      if (proj) {\n        var projKey = getUid(proj);\n        if (!(projKey in this.tileGridForProjection)) {\n          this.tileGridForProjection[projKey] = tilegrid;\n        }\n      }\n    }\n  };\n\n  return TileImage;\n}(UrlTile));\n\n\n/**\n * @param {ImageTile} imageTile Image tile.\n * @param {string} src Source.\n */\nfunction defaultTileLoadFunction(imageTile, src) {\n  /** @type {HTMLImageElement|HTMLVideoElement} */ (imageTile.getImage()).src = src;\n}\n\nexport default TileImage;\n\n//# sourceMappingURL=TileImage.js.map","/**\n * @module ol/source/XYZ\n */\n\nimport TileImage from './TileImage.js';\nimport {createXYZ, extentFromProjection} from '../tilegrid.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize=2048] Cache size.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that\n * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to\n * access pixel data with the Canvas renderer.  See\n * https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [opaque=true] Whether the layer is opaque.\n * @property {import(\"../proj.js\").ProjectionLike} [projection='EPSG:3857'] Projection.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {number} [maxZoom=18] Optional max zoom level.\n * @property {number} [minZoom=0] Optional min zoom level.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] Tile grid.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n *   imageTile.getImage().src = src;\n * };\n * ```\n * @property {number} [tilePixelRatio=1] The pixel ratio used by the tile service.\n * For example, if the tile service advertizes 256px by 256px tiles but actually sends 512px\n * by 512px images (for retina/hidpi devices) then `tilePixelRatio`\n * should be set to `2`.\n * @property {number|import(\"../size.js\").Size} [tileSize=[256, 256]] The tile size used by the tile service.\n * @property {import(\"../Tile.js\").UrlFunction} [tileUrlFunction] Optional function to get\n * tile URL given a tile coordinate and the projection.\n * Required if url or urls are not provided.\n * @property {string} [url] URL template. Must include `{x}`, `{y}` or `{-y}`,\n * and `{z}` placeholders. A `{?-?}` template pattern, for example `subdomain{a-f}.domain.com`,\n * may be used instead of defining each one separately in the `urls` option.\n * @property {Array<string>} [urls] An array of URL templates.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n */\n\n\n/**\n * @classdesc\n * Layer source for tile data with URLs in a set XYZ format that are\n * defined in a URL template. By default, this follows the widely-used\n * Google grid where `x` 0 and `y` 0 are in the top left. Grids like\n * TMS where `x` 0 and `y` 0 are in the bottom left can be used by\n * using the `{-y}` placeholder in the URL template, so long as the\n * source does not have a custom tile grid. In this case,\n * {@link module:ol/source/TileImage} can be used with a `tileUrlFunction`\n * such as:\n *\n *  tileUrlFunction: function(coordinate) {\n *    return 'http://mapserver.com/' + coordinate[0] + '/' +\n *        coordinate[1] + '/' + coordinate[2] + '.png';\n *    }\n *\n * @api\n */\nvar XYZ = /*@__PURE__*/(function (TileImage) {\n  function XYZ(opt_options) {\n    var options = opt_options || {};\n    var projection = options.projection !== undefined ?\n      options.projection : 'EPSG:3857';\n\n    var tileGrid = options.tileGrid !== undefined ? options.tileGrid :\n      createXYZ({\n        extent: extentFromProjection(projection),\n        maxZoom: options.maxZoom,\n        minZoom: options.minZoom,\n        tileSize: options.tileSize\n      });\n\n    TileImage.call(this, {\n      attributions: options.attributions,\n      cacheSize: options.cacheSize,\n      crossOrigin: options.crossOrigin,\n      opaque: options.opaque,\n      projection: projection,\n      reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n      tileGrid: tileGrid,\n      tileLoadFunction: options.tileLoadFunction,\n      tilePixelRatio: options.tilePixelRatio,\n      tileUrlFunction: options.tileUrlFunction,\n      url: options.url,\n      urls: options.urls,\n      wrapX: options.wrapX !== undefined ? options.wrapX : true,\n      transition: options.transition,\n      attributionsCollapsible: options.attributionsCollapsible\n    });\n\n  }\n\n  if ( TileImage ) XYZ.__proto__ = TileImage;\n  XYZ.prototype = Object.create( TileImage && TileImage.prototype );\n  XYZ.prototype.constructor = XYZ;\n\n  return XYZ;\n}(TileImage));\n\nexport default XYZ;\n\n//# sourceMappingURL=XYZ.js.map","/**\n * @module ol/source/OSM\n */\n\nimport XYZ from './XYZ.js';\n\n\n/**\n * The attribution containing a link to the OpenStreetMap Copyright and License\n * page.\n * @const\n * @type {string}\n * @api\n */\nexport var ATTRIBUTION = '&#169; ' +\n      '<a href=\"https://www.openstreetmap.org/copyright\">OpenStreetMap</a> ' +\n      'contributors.';\n\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize=2048] Cache size.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that\n * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to\n * access pixel data with the Canvas renderer.  See\n * https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {number} [maxZoom=19] Max zoom.\n * @property {boolean} [opaque=true] Whether the layer is opaque.\n * @property {number} [reprojectionErrorThreshold=1.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n *   imageTile.getImage().src = src;\n * };\n * ```\n * @property {string} [url='https://{a-c}.tile.openstreetmap.org/{z}/{x}/{y}.png'] URL template.\n * Must include `{x}`, `{y}` or `{-y}`, and `{z}` placeholders.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n */\n\n\n/**\n * @classdesc\n * Layer source for the OpenStreetMap tile server.\n * @api\n */\nvar OSM = /*@__PURE__*/(function (XYZ) {\n  function OSM(opt_options) {\n\n    var options = opt_options || {};\n\n    var attributions;\n    if (options.attributions !== undefined) {\n      attributions = options.attributions;\n    } else {\n      attributions = [ATTRIBUTION];\n    }\n\n    var crossOrigin = options.crossOrigin !== undefined ?\n      options.crossOrigin : 'anonymous';\n\n    var url = options.url !== undefined ?\n      options.url : 'https://{a-c}.tile.openstreetmap.org/{z}/{x}/{y}.png';\n\n    XYZ.call(this, {\n      attributions: attributions,\n      cacheSize: options.cacheSize,\n      crossOrigin: crossOrigin,\n      opaque: options.opaque !== undefined ? options.opaque : true,\n      maxZoom: options.maxZoom !== undefined ? options.maxZoom : 19,\n      reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n      tileLoadFunction: options.tileLoadFunction,\n      url: url,\n      wrapX: options.wrapX,\n      attributionsCollapsible: false\n    });\n\n  }\n\n  if ( XYZ ) OSM.__proto__ = XYZ;\n  OSM.prototype = Object.create( XYZ && XYZ.prototype );\n  OSM.prototype.constructor = OSM;\n\n  return OSM;\n}(XYZ));\n\nexport default OSM;\n\n//# sourceMappingURL=OSM.js.map","/**\n * @module ol/style/Image\n */\nimport {abstract} from '../util.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} opacity\n * @property {boolean} rotateWithView\n * @property {number} rotation\n * @property {number} scale\n */\n\n\n/**\n * @classdesc\n * A base class used for creating subclasses and not instantiated in\n * apps. Base class for {@link module:ol/style/Icon~Icon}, {@link module:ol/style/Circle~CircleStyle} and\n * {@link module:ol/style/RegularShape~RegularShape}.\n * @abstract\n * @api\n */\nvar ImageStyle = function ImageStyle(options) {\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.opacity_ = options.opacity;\n\n  /**\n   * @private\n   * @type {boolean}\n   */\n  this.rotateWithView_ = options.rotateWithView;\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.rotation_ = options.rotation;\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.scale_ = options.scale;\n\n};\n\n/**\n * Clones the style.\n * @return {ImageStyle} The cloned style.\n * @api\n */\nImageStyle.prototype.clone = function clone () {\n  return new ImageStyle({\n    opacity: this.getOpacity(),\n    scale: this.getScale(),\n    rotation: this.getRotation(),\n    rotateWithView: this.getRotateWithView()\n  });\n};\n\n/**\n * Get the symbolizer opacity.\n * @return {number} Opacity.\n * @api\n */\nImageStyle.prototype.getOpacity = function getOpacity () {\n  return this.opacity_;\n};\n\n/**\n * Determine whether the symbolizer rotates with the map.\n * @return {boolean} Rotate with map.\n * @api\n */\nImageStyle.prototype.getRotateWithView = function getRotateWithView () {\n  return this.rotateWithView_;\n};\n\n/**\n * Get the symoblizer rotation.\n * @return {number} Rotation.\n * @api\n */\nImageStyle.prototype.getRotation = function getRotation () {\n  return this.rotation_;\n};\n\n/**\n * Get the symbolizer scale.\n * @return {number} Scale.\n * @api\n */\nImageStyle.prototype.getScale = function getScale () {\n  return this.scale_;\n};\n\n/**\n * This method is deprecated and always returns false.\n * @return {boolean} false.\n * @deprecated\n * @api\n */\nImageStyle.prototype.getSnapToPixel = function getSnapToPixel () {\n  return false;\n};\n\n/**\n * Get the anchor point in pixels. The anchor determines the center point for the\n * symbolizer.\n * @abstract\n * @return {Array<number>} Anchor.\n */\nImageStyle.prototype.getAnchor = function getAnchor () {\n  return abstract();\n};\n\n/**\n * Get the image element for the symbolizer.\n * @abstract\n * @param {number} pixelRatio Pixel ratio.\n * @return {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement} Image element.\n */\nImageStyle.prototype.getImage = function getImage (pixelRatio) {\n  return abstract();\n};\n\n/**\n * @abstract\n * @param {number} pixelRatio Pixel ratio.\n * @return {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement} Image element.\n */\nImageStyle.prototype.getHitDetectionImage = function getHitDetectionImage (pixelRatio) {\n  return abstract();\n};\n\n/**\n * @abstract\n * @return {import(\"../ImageState.js\").default} Image state.\n */\nImageStyle.prototype.getImageState = function getImageState () {\n  return abstract();\n};\n\n/**\n * @abstract\n * @return {import(\"../size.js\").Size} Image size.\n */\nImageStyle.prototype.getImageSize = function getImageSize () {\n  return abstract();\n};\n\n/**\n * @abstract\n * @return {import(\"../size.js\").Size} Size of the hit-detection image.\n */\nImageStyle.prototype.getHitDetectionImageSize = function getHitDetectionImageSize () {\n  return abstract();\n};\n\n/**\n * Get the origin of the symbolizer.\n * @abstract\n * @return {Array<number>} Origin.\n */\nImageStyle.prototype.getOrigin = function getOrigin () {\n  return abstract();\n};\n\n/**\n * Get the size of the symbolizer (in pixels).\n * @abstract\n * @return {import(\"../size.js\").Size} Size.\n */\nImageStyle.prototype.getSize = function getSize () {\n  return abstract();\n};\n\n/**\n * Set the opacity.\n *\n * @param {number} opacity Opacity.\n * @api\n */\nImageStyle.prototype.setOpacity = function setOpacity (opacity) {\n  this.opacity_ = opacity;\n};\n\n/**\n * Set whether to rotate the style with the view.\n *\n * @param {boolean} rotateWithView Rotate with map.\n * @api\n */\nImageStyle.prototype.setRotateWithView = function setRotateWithView (rotateWithView) {\n  this.rotateWithView_ = rotateWithView;\n};\n\n/**\n * Set the rotation.\n *\n * @param {number} rotation Rotation.\n * @api\n */\nImageStyle.prototype.setRotation = function setRotation (rotation) {\n  this.rotation_ = rotation;\n};\n/**\n * Set the scale.\n *\n * @param {number} scale Scale.\n * @api\n */\nImageStyle.prototype.setScale = function setScale (scale) {\n  this.scale_ = scale;\n};\n\n/**\n * This method is deprecated and does nothing.\n * @param {boolean} snapToPixel Snap to pixel?\n * @deprecated\n * @api\n */\nImageStyle.prototype.setSnapToPixel = function setSnapToPixel (snapToPixel) {};\n\n/**\n * @abstract\n * @param {function(this: T, import(\"../events/Event.js\").default)} listener Listener function.\n * @param {T} thisArg Value to use as `this` when executing `listener`.\n * @return {import(\"../events.js\").EventsKey|undefined} Listener key.\n * @template T\n */\nImageStyle.prototype.listenImageChange = function listenImageChange (listener, thisArg) {\n  return abstract();\n};\n\n/**\n * Load not yet loaded URI.\n * @abstract\n */\nImageStyle.prototype.load = function load () {\n  abstract();\n};\n\n/**\n * @abstract\n * @param {function(this: T, import(\"../events/Event.js\").default)} listener Listener function.\n * @param {T} thisArg Value to use as `this` when executing `listener`.\n * @template T\n */\nImageStyle.prototype.unlistenImageChange = function unlistenImageChange (listener, thisArg) {\n  abstract();\n};\n\nexport default ImageStyle;\n\n//# sourceMappingURL=Image.js.map","/**\n * @module ol/style/RegularShape\n */\n\nimport {asString} from '../color.js';\nimport {asColorLike} from '../colorlike.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {CANVAS_LINE_DASH} from '../has.js';\nimport ImageState from '../ImageState.js';\nimport {defaultStrokeStyle, defaultFillStyle, defaultLineCap, defaultLineWidth, defaultLineJoin, defaultMiterLimit} from '../render/canvas.js';\nimport ImageStyle from './Image.js';\n\n\n/**\n * Specify radius for regular polygons, or radius1 and radius2 for stars.\n * @typedef {Object} Options\n * @property {import(\"./Fill.js\").default} [fill] Fill style.\n * @property {number} points Number of points for stars and regular polygons. In case of a polygon, the number of points\n * is the number of sides.\n * @property {number} [radius] Radius of a regular polygon.\n * @property {number} [radius1] Outer radius of a star.\n * @property {number} [radius2] Inner radius of a star.\n * @property {number} [angle=0] Shape's angle in radians. A value of 0 will have one of the shape's point facing up.\n * @property {import(\"./Stroke.js\").default} [stroke] Stroke style.\n * @property {number} [rotation=0] Rotation in radians (positive rotation clockwise).\n * @property {boolean} [rotateWithView=false] Whether to rotate the shape with the view.\n * @property {import(\"./AtlasManager.js\").default} [atlasManager] The atlas manager to use for this symbol. When\n * using WebGL it is recommended to use an atlas manager to avoid texture switching. If an atlas manager is given, the\n * symbol is added to an atlas. By default no atlas manager is used.\n */\n\n\n/**\n * @typedef {Object} RenderOptions\n * @property {import(\"../colorlike.js\").ColorLike} [strokeStyle]\n * @property {number} strokeWidth\n * @property {number} size\n * @property {string} lineCap\n * @property {Array<number>} lineDash\n * @property {number} lineDashOffset\n * @property {string} lineJoin\n * @property {number} miterLimit\n */\n\n\n/**\n * @classdesc\n * Set regular shape style for vector features. The resulting shape will be\n * a regular polygon when `radius` is provided, or a star when `radius1` and\n * `radius2` are provided.\n * @api\n */\nvar RegularShape = /*@__PURE__*/(function (ImageStyle) {\n  function RegularShape(options) {\n    /**\n     * @type {boolean}\n     */\n    var rotateWithView = options.rotateWithView !== undefined ?\n      options.rotateWithView : false;\n\n    ImageStyle.call(this, {\n      opacity: 1,\n      rotateWithView: rotateWithView,\n      rotation: options.rotation !== undefined ? options.rotation : 0,\n      scale: 1\n    });\n\n    /**\n     * @private\n     * @type {Array<string|number>}\n     */\n    this.checksums_ = null;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.canvas_ = null;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.hitDetectionCanvas_ = null;\n\n    /**\n     * @private\n     * @type {import(\"./Fill.js\").default}\n     */\n    this.fill_ = options.fill !== undefined ? options.fill : null;\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.origin_ = [0, 0];\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.points_ = options.points;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.radius_ = /** @type {number} */ (options.radius !== undefined ?\n      options.radius : options.radius1);\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.radius2_ = options.radius2;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.angle_ = options.angle !== undefined ? options.angle : 0;\n\n    /**\n     * @private\n     * @type {import(\"./Stroke.js\").default}\n     */\n    this.stroke_ = options.stroke !== undefined ? options.stroke : null;\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.anchor_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../size.js\").Size}\n     */\n    this.size_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../size.js\").Size}\n     */\n    this.imageSize_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../size.js\").Size}\n     */\n    this.hitDetectionImageSize_ = null;\n\n    /**\n     * @protected\n     * @type {import(\"./AtlasManager.js\").default|undefined}\n     */\n    this.atlasManager_ = options.atlasManager;\n\n    this.render_(this.atlasManager_);\n\n  }\n\n  if ( ImageStyle ) RegularShape.__proto__ = ImageStyle;\n  RegularShape.prototype = Object.create( ImageStyle && ImageStyle.prototype );\n  RegularShape.prototype.constructor = RegularShape;\n\n  /**\n   * Clones the style. If an atlasmanager was provided to the original style it will be used in the cloned style, too.\n   * @return {RegularShape} The cloned style.\n   * @api\n   */\n  RegularShape.prototype.clone = function clone () {\n    var style = new RegularShape({\n      fill: this.getFill() ? this.getFill().clone() : undefined,\n      points: this.getPoints(),\n      radius: this.getRadius(),\n      radius2: this.getRadius2(),\n      angle: this.getAngle(),\n      stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n      rotation: this.getRotation(),\n      rotateWithView: this.getRotateWithView(),\n      atlasManager: this.atlasManager_\n    });\n    style.setOpacity(this.getOpacity());\n    style.setScale(this.getScale());\n    return style;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  RegularShape.prototype.getAnchor = function getAnchor () {\n    return this.anchor_;\n  };\n\n  /**\n   * Get the angle used in generating the shape.\n   * @return {number} Shape's rotation in radians.\n   * @api\n   */\n  RegularShape.prototype.getAngle = function getAngle () {\n    return this.angle_;\n  };\n\n  /**\n   * Get the fill style for the shape.\n   * @return {import(\"./Fill.js\").default} Fill style.\n   * @api\n   */\n  RegularShape.prototype.getFill = function getFill () {\n    return this.fill_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  RegularShape.prototype.getHitDetectionImage = function getHitDetectionImage (pixelRatio) {\n    return this.hitDetectionCanvas_;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  RegularShape.prototype.getImage = function getImage (pixelRatio) {\n    return this.canvas_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  RegularShape.prototype.getImageSize = function getImageSize () {\n    return this.imageSize_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  RegularShape.prototype.getHitDetectionImageSize = function getHitDetectionImageSize () {\n    return this.hitDetectionImageSize_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  RegularShape.prototype.getImageState = function getImageState () {\n    return ImageState.LOADED;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  RegularShape.prototype.getOrigin = function getOrigin () {\n    return this.origin_;\n  };\n\n  /**\n   * Get the number of points for generating the shape.\n   * @return {number} Number of points for stars and regular polygons.\n   * @api\n   */\n  RegularShape.prototype.getPoints = function getPoints () {\n    return this.points_;\n  };\n\n  /**\n   * Get the (primary) radius for the shape.\n   * @return {number} Radius.\n   * @api\n   */\n  RegularShape.prototype.getRadius = function getRadius () {\n    return this.radius_;\n  };\n\n  /**\n   * Get the secondary radius for the shape.\n   * @return {number|undefined} Radius2.\n   * @api\n   */\n  RegularShape.prototype.getRadius2 = function getRadius2 () {\n    return this.radius2_;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  RegularShape.prototype.getSize = function getSize () {\n    return this.size_;\n  };\n\n  /**\n   * Get the stroke style for the shape.\n   * @return {import(\"./Stroke.js\").default} Stroke style.\n   * @api\n   */\n  RegularShape.prototype.getStroke = function getStroke () {\n    return this.stroke_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  RegularShape.prototype.listenImageChange = function listenImageChange (listener, thisArg) {\n    return undefined;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  RegularShape.prototype.load = function load () {};\n\n  /**\n   * @inheritDoc\n   */\n  RegularShape.prototype.unlistenImageChange = function unlistenImageChange (listener, thisArg) {};\n\n  /**\n   * @protected\n   * @param {import(\"./AtlasManager.js\").default|undefined} atlasManager An atlas manager.\n   */\n  RegularShape.prototype.render_ = function render_ (atlasManager) {\n    var imageSize;\n    var lineCap = '';\n    var lineJoin = '';\n    var miterLimit = 0;\n    var lineDash = null;\n    var lineDashOffset = 0;\n    var strokeStyle;\n    var strokeWidth = 0;\n\n    if (this.stroke_) {\n      strokeStyle = this.stroke_.getColor();\n      if (strokeStyle === null) {\n        strokeStyle = defaultStrokeStyle;\n      }\n      strokeStyle = asColorLike(strokeStyle);\n      strokeWidth = this.stroke_.getWidth();\n      if (strokeWidth === undefined) {\n        strokeWidth = defaultLineWidth;\n      }\n      lineDash = this.stroke_.getLineDash();\n      lineDashOffset = this.stroke_.getLineDashOffset();\n      if (!CANVAS_LINE_DASH) {\n        lineDash = null;\n        lineDashOffset = 0;\n      }\n      lineJoin = this.stroke_.getLineJoin();\n      if (lineJoin === undefined) {\n        lineJoin = defaultLineJoin;\n      }\n      lineCap = this.stroke_.getLineCap();\n      if (lineCap === undefined) {\n        lineCap = defaultLineCap;\n      }\n      miterLimit = this.stroke_.getMiterLimit();\n      if (miterLimit === undefined) {\n        miterLimit = defaultMiterLimit;\n      }\n    }\n\n    var size = 2 * (this.radius_ + strokeWidth) + 1;\n\n    /** @type {RenderOptions} */\n    var renderOptions = {\n      strokeStyle: strokeStyle,\n      strokeWidth: strokeWidth,\n      size: size,\n      lineCap: lineCap,\n      lineDash: lineDash,\n      lineDashOffset: lineDashOffset,\n      lineJoin: lineJoin,\n      miterLimit: miterLimit\n    };\n\n    if (atlasManager === undefined) {\n      // no atlas manager is used, create a new canvas\n      var context = createCanvasContext2D(size, size);\n      this.canvas_ = context.canvas;\n\n      // canvas.width and height are rounded to the closest integer\n      size = this.canvas_.width;\n      imageSize = size;\n\n      this.draw_(renderOptions, context, 0, 0);\n\n      this.createHitDetectionCanvas_(renderOptions);\n    } else {\n      // an atlas manager is used, add the symbol to an atlas\n      size = Math.round(size);\n\n      var hasCustomHitDetectionImage = !this.fill_;\n      var renderHitDetectionCallback;\n      if (hasCustomHitDetectionImage) {\n        // render the hit-detection image into a separate atlas image\n        renderHitDetectionCallback =\n            this.drawHitDetectionCanvas_.bind(this, renderOptions);\n      }\n\n      var id = this.getChecksum();\n      var info = atlasManager.add(\n        id, size, size, this.draw_.bind(this, renderOptions),\n        renderHitDetectionCallback);\n\n      this.canvas_ = info.image;\n      this.origin_ = [info.offsetX, info.offsetY];\n      imageSize = info.image.width;\n\n      if (hasCustomHitDetectionImage) {\n        this.hitDetectionCanvas_ = info.hitImage;\n        this.hitDetectionImageSize_ =\n            [info.hitImage.width, info.hitImage.height];\n      } else {\n        this.hitDetectionCanvas_ = this.canvas_;\n        this.hitDetectionImageSize_ = [imageSize, imageSize];\n      }\n    }\n\n    this.anchor_ = [size / 2, size / 2];\n    this.size_ = [size, size];\n    this.imageSize_ = [imageSize, imageSize];\n  };\n\n  /**\n   * @private\n   * @param {RenderOptions} renderOptions Render options.\n   * @param {CanvasRenderingContext2D} context The rendering context.\n   * @param {number} x The origin for the symbol (x).\n   * @param {number} y The origin for the symbol (y).\n   */\n  RegularShape.prototype.draw_ = function draw_ (renderOptions, context, x, y) {\n    var i, angle0, radiusC;\n    // reset transform\n    context.setTransform(1, 0, 0, 1, 0, 0);\n\n    // then move to (x, y)\n    context.translate(x, y);\n\n    context.beginPath();\n\n    var points = this.points_;\n    if (points === Infinity) {\n      context.arc(\n        renderOptions.size / 2, renderOptions.size / 2,\n        this.radius_, 0, 2 * Math.PI, true);\n    } else {\n      var radius2 = (this.radius2_ !== undefined) ? this.radius2_\n        : this.radius_;\n      if (radius2 !== this.radius_) {\n        points = 2 * points;\n      }\n      for (i = 0; i <= points; i++) {\n        angle0 = i * 2 * Math.PI / points - Math.PI / 2 + this.angle_;\n        radiusC = i % 2 === 0 ? this.radius_ : radius2;\n        context.lineTo(renderOptions.size / 2 + radiusC * Math.cos(angle0),\n          renderOptions.size / 2 + radiusC * Math.sin(angle0));\n      }\n    }\n\n\n    if (this.fill_) {\n      var color = this.fill_.getColor();\n      if (color === null) {\n        color = defaultFillStyle;\n      }\n      context.fillStyle = asColorLike(color);\n      context.fill();\n    }\n    if (this.stroke_) {\n      context.strokeStyle = renderOptions.strokeStyle;\n      context.lineWidth = renderOptions.strokeWidth;\n      if (renderOptions.lineDash) {\n        context.setLineDash(renderOptions.lineDash);\n        context.lineDashOffset = renderOptions.lineDashOffset;\n      }\n      context.lineCap = /** @type {CanvasLineCap} */ (renderOptions.lineCap);\n      context.lineJoin = /** @type {CanvasLineJoin} */ (renderOptions.lineJoin);\n      context.miterLimit = renderOptions.miterLimit;\n      context.stroke();\n    }\n    context.closePath();\n  };\n\n  /**\n   * @private\n   * @param {RenderOptions} renderOptions Render options.\n   */\n  RegularShape.prototype.createHitDetectionCanvas_ = function createHitDetectionCanvas_ (renderOptions) {\n    this.hitDetectionImageSize_ = [renderOptions.size, renderOptions.size];\n    if (this.fill_) {\n      this.hitDetectionCanvas_ = this.canvas_;\n      return;\n    }\n\n    // if no fill style is set, create an extra hit-detection image with a\n    // default fill style\n    var context = createCanvasContext2D(renderOptions.size, renderOptions.size);\n    this.hitDetectionCanvas_ = context.canvas;\n\n    this.drawHitDetectionCanvas_(renderOptions, context, 0, 0);\n  };\n\n  /**\n   * @private\n   * @param {RenderOptions} renderOptions Render options.\n   * @param {CanvasRenderingContext2D} context The context.\n   * @param {number} x The origin for the symbol (x).\n   * @param {number} y The origin for the symbol (y).\n   */\n  RegularShape.prototype.drawHitDetectionCanvas_ = function drawHitDetectionCanvas_ (renderOptions, context, x, y) {\n    // reset transform\n    context.setTransform(1, 0, 0, 1, 0, 0);\n\n    // then move to (x, y)\n    context.translate(x, y);\n\n    context.beginPath();\n\n    var points = this.points_;\n    if (points === Infinity) {\n      context.arc(\n        renderOptions.size / 2, renderOptions.size / 2,\n        this.radius_, 0, 2 * Math.PI, true);\n    } else {\n      var radius2 = (this.radius2_ !== undefined) ? this.radius2_\n        : this.radius_;\n      if (radius2 !== this.radius_) {\n        points = 2 * points;\n      }\n      var i, radiusC, angle0;\n      for (i = 0; i <= points; i++) {\n        angle0 = i * 2 * Math.PI / points - Math.PI / 2 + this.angle_;\n        radiusC = i % 2 === 0 ? this.radius_ : radius2;\n        context.lineTo(renderOptions.size / 2 + radiusC * Math.cos(angle0),\n          renderOptions.size / 2 + radiusC * Math.sin(angle0));\n      }\n    }\n\n    context.fillStyle = asString(defaultFillStyle);\n    context.fill();\n    if (this.stroke_) {\n      context.strokeStyle = renderOptions.strokeStyle;\n      context.lineWidth = renderOptions.strokeWidth;\n      if (renderOptions.lineDash) {\n        context.setLineDash(renderOptions.lineDash);\n        context.lineDashOffset = renderOptions.lineDashOffset;\n      }\n      context.stroke();\n    }\n    context.closePath();\n  };\n\n  /**\n   * @return {string} The checksum.\n   */\n  RegularShape.prototype.getChecksum = function getChecksum () {\n    var strokeChecksum = this.stroke_ ?\n      this.stroke_.getChecksum() : '-';\n    var fillChecksum = this.fill_ ?\n      this.fill_.getChecksum() : '-';\n\n    var recalculate = !this.checksums_ ||\n        (strokeChecksum != this.checksums_[1] ||\n        fillChecksum != this.checksums_[2] ||\n        this.radius_ != this.checksums_[3] ||\n        this.radius2_ != this.checksums_[4] ||\n        this.angle_ != this.checksums_[5] ||\n        this.points_ != this.checksums_[6]);\n\n    if (recalculate) {\n      var checksum = 'r' + strokeChecksum + fillChecksum +\n          (this.radius_ !== undefined ? this.radius_.toString() : '-') +\n          (this.radius2_ !== undefined ? this.radius2_.toString() : '-') +\n          (this.angle_ !== undefined ? this.angle_.toString() : '-') +\n          (this.points_ !== undefined ? this.points_.toString() : '-');\n      this.checksums_ = [checksum, strokeChecksum, fillChecksum,\n        this.radius_, this.radius2_, this.angle_, this.points_];\n    }\n\n    return /** @type {string} */ (this.checksums_[0]);\n  };\n\n  return RegularShape;\n}(ImageStyle));\n\n\nexport default RegularShape;\n\n//# sourceMappingURL=RegularShape.js.map","/**\n * @module ol/style/Circle\n */\n\nimport RegularShape from './RegularShape.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Fill.js\").default} [fill] Fill style.\n * @property {number} radius Circle radius.\n * @property {import(\"./Stroke.js\").default} [stroke] Stroke style.\n * @property {import(\"./AtlasManager.js\").default} [atlasManager] The atlas manager to use for this circle.\n * When using WebGL it is recommended to use an atlas manager to avoid texture switching. If an atlas manager is given,\n * the circle is added to an atlas. By default no atlas manager is used.\n */\n\n\n/**\n * @classdesc\n * Set circle style for vector features.\n * @api\n */\nvar CircleStyle = /*@__PURE__*/(function (RegularShape) {\n  function CircleStyle(opt_options) {\n\n    var options = opt_options || /** @type {Options} */ ({});\n\n    RegularShape.call(this, {\n      points: Infinity,\n      fill: options.fill,\n      radius: options.radius,\n      stroke: options.stroke,\n      atlasManager: options.atlasManager\n    });\n\n  }\n\n  if ( RegularShape ) CircleStyle.__proto__ = RegularShape;\n  CircleStyle.prototype = Object.create( RegularShape && RegularShape.prototype );\n  CircleStyle.prototype.constructor = CircleStyle;\n\n  /**\n  * Clones the style.  If an atlasmanager was provided to the original style it will be used in the cloned style, too.\n  * @return {CircleStyle} The cloned style.\n  * @override\n  * @api\n  */\n  CircleStyle.prototype.clone = function clone () {\n    var style = new CircleStyle({\n      fill: this.getFill() ? this.getFill().clone() : undefined,\n      stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n      radius: this.getRadius(),\n      atlasManager: this.atlasManager_\n    });\n    style.setOpacity(this.getOpacity());\n    style.setScale(this.getScale());\n    return style;\n  };\n\n  /**\n  * Set the circle radius.\n  *\n  * @param {number} radius Circle radius.\n  * @api\n  */\n  CircleStyle.prototype.setRadius = function setRadius (radius) {\n    this.radius_ = radius;\n    this.render_(this.atlasManager_);\n  };\n\n  return CircleStyle;\n}(RegularShape));\n\n\nexport default CircleStyle;\n\n//# sourceMappingURL=Circle.js.map","/**\n * @module ol/style/Fill\n */\nimport {getUid} from '../util.js';\nimport {asString} from '../color.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} [color] A color, gradient or pattern.\n * See {@link module:ol/color~Color} and {@link module:ol/colorlike~ColorLike} for possible formats.\n * Default null; if null, the Canvas/renderer default black will be used.\n */\n\n\n/**\n * @classdesc\n * Set fill style for vector features.\n * @api\n */\nvar Fill = function Fill(opt_options) {\n\n  var options = opt_options || {};\n\n  /**\n   * @private\n   * @type {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike}\n   */\n  this.color_ = options.color !== undefined ? options.color : null;\n\n  /**\n   * @private\n   * @type {string|undefined}\n   */\n  this.checksum_ = undefined;\n};\n\n/**\n * Clones the style. The color is not cloned if it is an {@link module:ol/colorlike~ColorLike}.\n * @return {Fill} The cloned style.\n * @api\n */\nFill.prototype.clone = function clone () {\n  var color = this.getColor();\n  return new Fill({\n    color: Array.isArray(color) ? color.slice() : color || undefined\n  });\n};\n\n/**\n * Get the fill color.\n * @return {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} Color.\n * @api\n */\nFill.prototype.getColor = function getColor () {\n  return this.color_;\n};\n\n/**\n * Set the color.\n *\n * @param {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} color Color.\n * @api\n */\nFill.prototype.setColor = function setColor (color) {\n  this.color_ = color;\n  this.checksum_ = undefined;\n};\n\n/**\n * @return {string} The checksum.\n */\nFill.prototype.getChecksum = function getChecksum () {\n  if (this.checksum_ === undefined) {\n    var color = this.color_;\n    if (color) {\n      if (Array.isArray(color) || typeof color == 'string') {\n        this.checksum_ = 'f' + asString(/** @type {import(\"../color.js\").Color|string} */ (color));\n      } else {\n        this.checksum_ = getUid(this.color_);\n      }\n    } else {\n      this.checksum_ = 'f-';\n    }\n  }\n\n  return this.checksum_;\n};\n\nexport default Fill;\n\n//# sourceMappingURL=Fill.js.map","/**\n * @module ol/style/Style\n */\n\n/**\n * Feature styles.\n *\n * If no style is defined, the following default style is used:\n * ```js\n *  import {Fill, Stroke, Circle, Style} from 'ol/style';\n *\n *  var fill = new Fill({\n *    color: 'rgba(255,255,255,0.4)'\n *  });\n *  var stroke = new Stroke({\n *    color: '#3399CC',\n *    width: 1.25\n *  });\n *  var styles = [\n *    new Style({\n *      image: new Circle({\n *        fill: fill,\n *        stroke: stroke,\n *        radius: 5\n *      }),\n *      fill: fill,\n *      stroke: stroke\n *    })\n *  ];\n * ```\n *\n * A separate editing style has the following defaults:\n * ```js\n *  import {Fill, Stroke, Circle, Style} from 'ol/style';\n *  import GeometryType from 'ol/geom/GeometryType';\n *\n *  var white = [255, 255, 255, 1];\n *  var blue = [0, 153, 255, 1];\n *  var width = 3;\n *  styles[GeometryType.POLYGON] = [\n *    new Style({\n *      fill: new Fill({\n *        color: [255, 255, 255, 0.5]\n *      })\n *    })\n *  ];\n *  styles[GeometryType.MULTI_POLYGON] =\n *      styles[GeometryType.POLYGON];\n *  styles[GeometryType.LINE_STRING] = [\n *    new Style({\n *      stroke: new Stroke({\n *        color: white,\n *        width: width + 2\n *      })\n *    }),\n *    new Style({\n *      stroke: new Stroke({\n *        color: blue,\n *        width: width\n *      })\n *    })\n *  ];\n *  styles[GeometryType.MULTI_LINE_STRING] =\n *      styles[GeometryType.LINE_STRING];\n *  styles[GeometryType.POINT] = [\n *    new Style({\n *      image: new Circle({\n *        radius: width * 2,\n *        fill: new Fill({\n *          color: blue\n *        }),\n *        stroke: new Stroke({\n *          color: white,\n *          width: width / 2\n *        })\n *      }),\n *      zIndex: Infinity\n *    })\n *  ];\n *  styles[GeometryType.MULTI_POINT] =\n *      styles[GeometryType.POINT];\n *  styles[GeometryType.GEOMETRY_COLLECTION] =\n *      styles[GeometryType.POLYGON].concat(\n *          styles[GeometryType.LINE_STRING],\n *          styles[GeometryType.POINT]\n *      );\n * ```\n */\nimport {assert} from '../asserts.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport CircleStyle from './Circle.js';\nimport Fill from './Fill.js';\nimport Stroke from './Stroke.js';\n\n\n/**\n * A function that takes an {@link module:ol/Feature} and a `{number}`\n * representing the view's resolution. The function should return a\n * {@link module:ol/style/Style} or an array of them. This way e.g. a\n * vector layer can be styled.\n *\n * @typedef {function(import(\"../Feature.js\").FeatureLike, number):(Style|Array<Style>)} StyleFunction\n */\n\n/**\n * A {@link Style}, an array of {@link Style}, or a {@link StyleFunction}.\n * @typedef {Style|Array<Style>|StyleFunction} StyleLike\n */\n\n/**\n * A function that takes an {@link module:ol/Feature} as argument and returns an\n * {@link module:ol/geom/Geometry} that will be rendered and styled for the feature.\n *\n * @typedef {function(import(\"../Feature.js\").FeatureLike):\n *     (import(\"../geom/Geometry.js\").default|import(\"../render/Feature.js\").default|undefined)} GeometryFunction\n */\n\n\n/**\n * Custom renderer function. Takes two arguments:\n *\n * 1. The pixel coordinates of the geometry in GeoJSON notation.\n * 2. The {@link module:ol/render~State} of the layer renderer.\n *\n * @typedef {function((import(\"../coordinate.js\").Coordinate|Array<import(\"../coordinate.js\").Coordinate>|Array<Array<import(\"../coordinate.js\").Coordinate>>),import(\"../render.js\").State)}\n * RenderFunction\n */\n\n\n/**\n * @typedef {Object} Options\n * @property {string|import(\"../geom/Geometry.js\").default|GeometryFunction} [geometry] Feature property or geometry\n * or function returning a geometry to render for this style.\n * @property {import(\"./Fill.js\").default} [fill] Fill style.\n * @property {import(\"./Image.js\").default} [image] Image style.\n * @property {RenderFunction} [renderer] Custom renderer. When configured, `fill`, `stroke` and `image` will be\n * ignored, and the provided function will be called with each render frame for each geometry.\n * @property {import(\"./Stroke.js\").default} [stroke] Stroke style.\n * @property {import(\"./Text.js\").default} [text] Text style.\n * @property {number} [zIndex] Z index.\n */\n\n/**\n * @classdesc\n * Container for vector feature rendering styles. Any changes made to the style\n * or its children through `set*()` methods will not take effect until the\n * feature or layer that uses the style is re-rendered.\n * @api\n */\nvar Style = function Style(opt_options) {\n\n  var options = opt_options || {};\n\n  /**\n   * @private\n   * @type {string|import(\"../geom/Geometry.js\").default|GeometryFunction}\n   */\n  this.geometry_ = null;\n\n  /**\n   * @private\n   * @type {!GeometryFunction}\n   */\n  this.geometryFunction_ = defaultGeometryFunction;\n\n  if (options.geometry !== undefined) {\n    this.setGeometry(options.geometry);\n  }\n\n  /**\n   * @private\n   * @type {import(\"./Fill.js\").default}\n   */\n  this.fill_ = options.fill !== undefined ? options.fill : null;\n\n  /**\n     * @private\n     * @type {import(\"./Image.js\").default}\n     */\n  this.image_ = options.image !== undefined ? options.image : null;\n\n  /**\n   * @private\n   * @type {RenderFunction|null}\n   */\n  this.renderer_ = options.renderer !== undefined ? options.renderer : null;\n\n  /**\n   * @private\n   * @type {import(\"./Stroke.js\").default}\n   */\n  this.stroke_ = options.stroke !== undefined ? options.stroke : null;\n\n  /**\n   * @private\n   * @type {import(\"./Text.js\").default}\n   */\n  this.text_ = options.text !== undefined ? options.text : null;\n\n  /**\n   * @private\n   * @type {number|undefined}\n   */\n  this.zIndex_ = options.zIndex;\n\n};\n\n/**\n * Clones the style.\n * @return {Style} The cloned style.\n * @api\n */\nStyle.prototype.clone = function clone () {\n  var geometry = this.getGeometry();\n  if (geometry && typeof geometry === 'object') {\n    geometry = /** @type {import(\"../geom/Geometry.js\").default} */ (geometry).clone();\n  }\n  return new Style({\n    geometry: geometry,\n    fill: this.getFill() ? this.getFill().clone() : undefined,\n    image: this.getImage() ? this.getImage().clone() : undefined,\n    stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n    text: this.getText() ? this.getText().clone() : undefined,\n    zIndex: this.getZIndex()\n  });\n};\n\n/**\n * Get the custom renderer function that was configured with\n * {@link #setRenderer} or the `renderer` constructor option.\n * @return {RenderFunction|null} Custom renderer function.\n * @api\n */\nStyle.prototype.getRenderer = function getRenderer () {\n  return this.renderer_;\n};\n\n/**\n * Sets a custom renderer function for this style. When set, `fill`, `stroke`\n * and `image` options of the style will be ignored.\n * @param {RenderFunction|null} renderer Custom renderer function.\n * @api\n */\nStyle.prototype.setRenderer = function setRenderer (renderer) {\n  this.renderer_ = renderer;\n};\n\n/**\n * Get the geometry to be rendered.\n * @return {string|import(\"../geom/Geometry.js\").default|GeometryFunction}\n * Feature property or geometry or function that returns the geometry that will\n * be rendered with this style.\n * @api\n */\nStyle.prototype.getGeometry = function getGeometry () {\n  return this.geometry_;\n};\n\n/**\n * Get the function used to generate a geometry for rendering.\n * @return {!GeometryFunction} Function that is called with a feature\n * and returns the geometry to render instead of the feature's geometry.\n * @api\n */\nStyle.prototype.getGeometryFunction = function getGeometryFunction () {\n  return this.geometryFunction_;\n};\n\n/**\n * Get the fill style.\n * @return {import(\"./Fill.js\").default} Fill style.\n * @api\n */\nStyle.prototype.getFill = function getFill () {\n  return this.fill_;\n};\n\n/**\n * Set the fill style.\n * @param {import(\"./Fill.js\").default} fill Fill style.\n * @api\n */\nStyle.prototype.setFill = function setFill (fill) {\n  this.fill_ = fill;\n};\n\n/**\n * Get the image style.\n * @return {import(\"./Image.js\").default} Image style.\n * @api\n */\nStyle.prototype.getImage = function getImage () {\n  return this.image_;\n};\n\n/**\n * Set the image style.\n * @param {import(\"./Image.js\").default} image Image style.\n * @api\n */\nStyle.prototype.setImage = function setImage (image) {\n  this.image_ = image;\n};\n\n/**\n * Get the stroke style.\n * @return {import(\"./Stroke.js\").default} Stroke style.\n * @api\n */\nStyle.prototype.getStroke = function getStroke () {\n  return this.stroke_;\n};\n\n/**\n * Set the stroke style.\n * @param {import(\"./Stroke.js\").default} stroke Stroke style.\n * @api\n */\nStyle.prototype.setStroke = function setStroke (stroke) {\n  this.stroke_ = stroke;\n};\n\n/**\n * Get the text style.\n * @return {import(\"./Text.js\").default} Text style.\n * @api\n */\nStyle.prototype.getText = function getText () {\n  return this.text_;\n};\n\n/**\n * Set the text style.\n * @param {import(\"./Text.js\").default} text Text style.\n * @api\n */\nStyle.prototype.setText = function setText (text) {\n  this.text_ = text;\n};\n\n/**\n * Get the z-index for the style.\n * @return {number|undefined} ZIndex.\n * @api\n */\nStyle.prototype.getZIndex = function getZIndex () {\n  return this.zIndex_;\n};\n\n/**\n * Set a geometry that is rendered instead of the feature's geometry.\n *\n * @param {string|import(\"../geom/Geometry.js\").default|GeometryFunction} geometry\n *   Feature property or geometry or function returning a geometry to render\n *   for this style.\n * @api\n */\nStyle.prototype.setGeometry = function setGeometry (geometry) {\n  if (typeof geometry === 'function') {\n    this.geometryFunction_ = geometry;\n  } else if (typeof geometry === 'string') {\n    this.geometryFunction_ = function(feature) {\n      return (\n        /** @type {import(\"../geom/Geometry.js\").default} */ (feature.get(geometry))\n      );\n    };\n  } else if (!geometry) {\n    this.geometryFunction_ = defaultGeometryFunction;\n  } else if (geometry !== undefined) {\n    this.geometryFunction_ = function() {\n      return (\n        /** @type {import(\"../geom/Geometry.js\").default} */ (geometry)\n      );\n    };\n  }\n  this.geometry_ = geometry;\n};\n\n/**\n * Set the z-index.\n *\n * @param {number|undefined} zIndex ZIndex.\n * @api\n */\nStyle.prototype.setZIndex = function setZIndex (zIndex) {\n  this.zIndex_ = zIndex;\n};\n\n\n/**\n * Convert the provided object into a style function.  Functions passed through\n * unchanged.  Arrays of Style or single style objects wrapped in a\n * new style function.\n * @param {StyleFunction|Array<Style>|Style} obj\n *     A style function, a single style, or an array of styles.\n * @return {StyleFunction} A style function.\n */\nexport function toFunction(obj) {\n  var styleFunction;\n\n  if (typeof obj === 'function') {\n    styleFunction = obj;\n  } else {\n    /**\n     * @type {Array<Style>}\n     */\n    var styles;\n    if (Array.isArray(obj)) {\n      styles = obj;\n    } else {\n      assert(typeof /** @type {?} */ (obj).getZIndex === 'function',\n        41); // Expected an `Style` or an array of `Style`\n      var style = /** @type {Style} */ (obj);\n      styles = [style];\n    }\n    styleFunction = function() {\n      return styles;\n    };\n  }\n  return styleFunction;\n}\n\n\n/**\n * @type {Array<Style>}\n */\nvar defaultStyles = null;\n\n\n/**\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} resolution Resolution.\n * @return {Array<Style>} Style.\n */\nexport function createDefaultStyle(feature, resolution) {\n  // We don't use an immediately-invoked function\n  // and a closure so we don't get an error at script evaluation time in\n  // browsers that do not support Canvas. (import(\"./Circle.js\").CircleStyle does\n  // canvas.getContext('2d') at construction time, which will cause an.error\n  // in such browsers.)\n  if (!defaultStyles) {\n    var fill = new Fill({\n      color: 'rgba(255,255,255,0.4)'\n    });\n    var stroke = new Stroke({\n      color: '#3399CC',\n      width: 1.25\n    });\n    defaultStyles = [\n      new Style({\n        image: new CircleStyle({\n          fill: fill,\n          stroke: stroke,\n          radius: 5\n        }),\n        fill: fill,\n        stroke: stroke\n      })\n    ];\n  }\n  return defaultStyles;\n}\n\n\n/**\n * Default styles for editing features.\n * @return {Object<import(\"../geom/GeometryType.js\").default, Array<Style>>} Styles\n */\nexport function createEditingStyle() {\n  /** @type {Object<import(\"../geom/GeometryType.js\").default, Array<Style>>} */\n  var styles = {};\n  var white = [255, 255, 255, 1];\n  var blue = [0, 153, 255, 1];\n  var width = 3;\n  styles[GeometryType.POLYGON] = [\n    new Style({\n      fill: new Fill({\n        color: [255, 255, 255, 0.5]\n      })\n    })\n  ];\n  styles[GeometryType.MULTI_POLYGON] =\n      styles[GeometryType.POLYGON];\n\n  styles[GeometryType.LINE_STRING] = [\n    new Style({\n      stroke: new Stroke({\n        color: white,\n        width: width + 2\n      })\n    }),\n    new Style({\n      stroke: new Stroke({\n        color: blue,\n        width: width\n      })\n    })\n  ];\n  styles[GeometryType.MULTI_LINE_STRING] =\n      styles[GeometryType.LINE_STRING];\n\n  styles[GeometryType.CIRCLE] =\n      styles[GeometryType.POLYGON].concat(\n        styles[GeometryType.LINE_STRING]\n      );\n\n\n  styles[GeometryType.POINT] = [\n    new Style({\n      image: new CircleStyle({\n        radius: width * 2,\n        fill: new Fill({\n          color: blue\n        }),\n        stroke: new Stroke({\n          color: white,\n          width: width / 2\n        })\n      }),\n      zIndex: Infinity\n    })\n  ];\n  styles[GeometryType.MULTI_POINT] =\n      styles[GeometryType.POINT];\n\n  styles[GeometryType.GEOMETRY_COLLECTION] =\n      styles[GeometryType.POLYGON].concat(\n        styles[GeometryType.LINE_STRING],\n        styles[GeometryType.POINT]\n      );\n\n  return styles;\n}\n\n\n/**\n * Function that is called with a feature and returns its default geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature to get the geometry for.\n * @return {import(\"../geom/Geometry.js\").default|import(\"../render/Feature.js\").default|undefined} Geometry to render.\n */\nfunction defaultGeometryFunction(feature) {\n  return feature.getGeometry();\n}\n\nexport default Style;\n\n//# sourceMappingURL=Style.js.map","/**\n * @module ol/layer/Vector\n */\nimport LayerType from '../LayerType.js';\nimport Layer from './Layer.js';\nimport VectorRenderType from './VectorRenderType.js';\nimport {assign} from '../obj.js';\nimport {createDefaultStyle, toFunction as toStyleFunction} from '../style/Style.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {import(\"../render.js\").OrderFunction} [renderOrder] Render order. Function to be used when sorting\n * features before rendering. By default features are drawn in the order that they are created. Use\n * `null` to avoid the sort, but get an undefined draw order.\n * @property {number} [renderBuffer=100] The buffer in pixels around the viewport extent used by the\n * renderer when getting features from the vector source for the rendering or hit-detection.\n * Recommended value: the size of the largest symbol, line width or label.\n * @property {import(\"./VectorRenderType.js\").default|string} [renderMode='vector'] Render mode for vector layers:\n *  * `'image'`: Vector layers are rendered as images. Great performance, but point symbols and\n *    texts are always rotated with the view and pixels are scaled during zoom animations.\n *  * `'vector'`: Vector layers are rendered as vectors. Most accurate rendering even during\n *    animations, but slower performance.\n * @property {import(\"../source/Vector.js\").default} [source] Source.\n * @property {import(\"../PluggableMap.js\").default} [map] Sets the layer as overlay on a map. The map will not manage\n * this layer in its layers collection, and the layer will be rendered on top. This is useful for\n * temporary layers. The standard way to add a layer to a map and have it managed by the map is to\n * use {@link module:ol/Map#addLayer}.\n * @property {boolean} [declutter=false] Declutter images and text. Decluttering is applied to all\n * image and text styles, and the priority is defined by the z-index of the style. Lower z-index\n * means higher priority.\n * @property {import(\"../style/Style.js\").StyleLike} [style] Layer style. See\n * {@link module:ol/style} for default style which will be used if this is not defined.\n * @property {boolean} [updateWhileAnimating=false] When set to `true` and `renderMode`\n * is `vector`, feature batches will be recreated during animations. This means that no\n * vectors will be shown clipped, but the setting will have a performance impact for large\n * amounts of vector data. When set to `false`, batches will be recreated when no animation\n * is active.\n * @property {boolean} [updateWhileInteracting=false] When set to `true` and `renderMode`\n * is `vector`, feature batches will be recreated during interactions. See also\n * `updateWhileAnimating`.\n */\n\n\n/**\n * @enum {string}\n * @private\n */\nvar Property = {\n  RENDER_ORDER: 'renderOrder'\n};\n\n\n/**\n * @classdesc\n * Vector data that is rendered client-side.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @api\n */\nvar VectorLayer = /*@__PURE__*/(function (Layer) {\n  function VectorLayer(opt_options) {\n    var options = opt_options ?\n      opt_options : /** @type {Options} */ ({});\n\n    var baseOptions = assign({}, options);\n\n    delete baseOptions.style;\n    delete baseOptions.renderBuffer;\n    delete baseOptions.updateWhileAnimating;\n    delete baseOptions.updateWhileInteracting;\n    Layer.call(this, baseOptions);\n\n    /**\n    * @private\n    * @type {boolean}\n    */\n    this.declutter_ = options.declutter !== undefined ? options.declutter : false;\n\n    /**\n    * @type {number}\n    * @private\n    */\n    this.renderBuffer_ = options.renderBuffer !== undefined ?\n      options.renderBuffer : 100;\n\n    /**\n    * User provided style.\n    * @type {import(\"../style/Style.js\").StyleLike}\n    * @private\n    */\n    this.style_ = null;\n\n    /**\n    * Style function for use within the library.\n    * @type {import(\"../style/Style.js\").StyleFunction|undefined}\n    * @private\n    */\n    this.styleFunction_ = undefined;\n\n    this.setStyle(options.style);\n\n    /**\n    * @type {boolean}\n    * @private\n    */\n    this.updateWhileAnimating_ = options.updateWhileAnimating !== undefined ?\n      options.updateWhileAnimating : false;\n\n    /**\n    * @type {boolean}\n    * @private\n    */\n    this.updateWhileInteracting_ = options.updateWhileInteracting !== undefined ?\n      options.updateWhileInteracting : false;\n\n    /**\n    * @private\n    * @type {import(\"./VectorTileRenderType.js\").default|string}\n    */\n    this.renderMode_ = options.renderMode || VectorRenderType.VECTOR;\n\n    /**\n    * The layer type.\n    * @protected\n    * @type {import(\"../LayerType.js\").default}\n    */\n    this.type = LayerType.VECTOR;\n\n  }\n\n  if ( Layer ) VectorLayer.__proto__ = Layer;\n  VectorLayer.prototype = Object.create( Layer && Layer.prototype );\n  VectorLayer.prototype.constructor = VectorLayer;\n\n  /**\n  * @return {boolean} Declutter.\n  */\n  VectorLayer.prototype.getDeclutter = function getDeclutter () {\n    return this.declutter_;\n  };\n\n  /**\n  * @param {boolean} declutter Declutter.\n  */\n  VectorLayer.prototype.setDeclutter = function setDeclutter (declutter) {\n    this.declutter_ = declutter;\n  };\n\n  /**\n  * @return {number|undefined} Render buffer.\n  */\n  VectorLayer.prototype.getRenderBuffer = function getRenderBuffer () {\n    return this.renderBuffer_;\n  };\n\n  /**\n  * @return {function(import(\"../Feature.js\").default, import(\"../Feature.js\").default): number|null|undefined} Render\n  *     order.\n  */\n  VectorLayer.prototype.getRenderOrder = function getRenderOrder () {\n    return (\n    /** @type {import(\"../render.js\").OrderFunction|null|undefined} */ (this.get(Property.RENDER_ORDER))\n    );\n  };\n\n  /**\n  * Get the style for features.  This returns whatever was passed to the `style`\n  * option at construction or to the `setStyle` method.\n  * @return {import(\"../style/Style.js\").StyleLike}\n  *     Layer style.\n  * @api\n  */\n  VectorLayer.prototype.getStyle = function getStyle () {\n    return this.style_;\n  };\n\n  /**\n  * Get the style function.\n  * @return {import(\"../style/Style.js\").StyleFunction|undefined} Layer style function.\n  * @api\n  */\n  VectorLayer.prototype.getStyleFunction = function getStyleFunction () {\n    return this.styleFunction_;\n  };\n\n  /**\n  * @return {boolean} Whether the rendered layer should be updated while\n  *     animating.\n  */\n  VectorLayer.prototype.getUpdateWhileAnimating = function getUpdateWhileAnimating () {\n    return this.updateWhileAnimating_;\n  };\n\n  /**\n  * @return {boolean} Whether the rendered layer should be updated while\n  *     interacting.\n  */\n  VectorLayer.prototype.getUpdateWhileInteracting = function getUpdateWhileInteracting () {\n    return this.updateWhileInteracting_;\n  };\n\n  /**\n  * @param {import(\"../render.js\").OrderFunction|null|undefined} renderOrder\n  *     Render order.\n  */\n  VectorLayer.prototype.setRenderOrder = function setRenderOrder (renderOrder) {\n    this.set(Property.RENDER_ORDER, renderOrder);\n  };\n\n  /**\n  * Set the style for features.  This can be a single style object, an array\n  * of styles, or a function that takes a feature and resolution and returns\n  * an array of styles. If it is `undefined` the default style is used. If\n  * it is `null` the layer has no style (a `null` style), so only features\n  * that have their own styles will be rendered in the layer. See\n  * {@link module:ol/style} for information on the default style.\n  * @param {import(\"../style/Style.js\").default|Array<import(\"../style/Style.js\").default>|import(\"../style/Style.js\").StyleFunction|null|undefined} style Layer style.\n  * @api\n  */\n  VectorLayer.prototype.setStyle = function setStyle (style) {\n    this.style_ = style !== undefined ? style : createDefaultStyle;\n    this.styleFunction_ = style === null ?\n      undefined : toStyleFunction(this.style_);\n    this.changed();\n  };\n\n  /**\n  * @return {import(\"./VectorRenderType.js\").default|string} The render mode.\n  */\n  VectorLayer.prototype.getRenderMode = function getRenderMode () {\n    return this.renderMode_;\n  };\n\n  return VectorLayer;\n}(Layer));\n\n\n/**\n * Return the associated {@link module:ol/source/Vector vectorsource} of the layer.\n * @function\n * @return {import(\"../source/Vector.js\").default} Source.\n * @api\n */\nVectorLayer.prototype.getSource;\n\n\nexport default VectorLayer;\n\n//# sourceMappingURL=Vector.js.map","/**\n * @module ol/format/FormatType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  ARRAY_BUFFER: 'arraybuffer',\n  JSON: 'json',\n  TEXT: 'text',\n  XML: 'xml'\n};\n\n//# sourceMappingURL=FormatType.js.map","/**\n * @module ol/featureloader\n */\nimport {VOID} from './functions.js';\nimport FormatType from './format/FormatType.js';\n\n/**\n * {@link module:ol/source/Vector} sources use a function of this type to\n * load features.\n *\n * This function takes an {@link module:ol/extent~Extent} representing the area to be loaded,\n * a `{number}` representing the resolution (map units per pixel) and an\n * {@link module:ol/proj/Projection} for the projection  as\n * arguments. `this` within the function is bound to the\n * {@link module:ol/source/Vector} it's called from.\n *\n * The function is responsible for loading the features and adding them to the\n * source.\n * @typedef {function(this:(import(\"./source/Vector\").default|import(\"./VectorTile.js\").default), import(\"./extent.js\").Extent, number,\n *                    import(\"./proj/Projection.js\").default)} FeatureLoader\n * @api\n */\n\n\n/**\n * {@link module:ol/source/Vector} sources use a function of this type to\n * get the url to load features from.\n *\n * This function takes an {@link module:ol/extent~Extent} representing the area\n * to be loaded, a `{number}` representing the resolution (map units per pixel)\n * and an {@link module:ol/proj/Projection} for the projection  as\n * arguments and returns a `{string}` representing the URL.\n * @typedef {function(import(\"./extent.js\").Extent, number, import(\"./proj/Projection.js\").default): string} FeatureUrlFunction\n * @api\n */\n\n\n/**\n * @param {string|FeatureUrlFunction} url Feature URL service.\n * @param {import(\"./format/Feature.js\").default} format Feature format.\n * @param {function(this:import(\"./VectorTile.js\").default, Array<import(\"./Feature.js\").default>, import(\"./proj/Projection.js\").default, import(\"./extent.js\").Extent)|function(this:import(\"./source/Vector\").default, Array<import(\"./Feature.js\").default>)} success\n *     Function called with the loaded features and optionally with the data\n *     projection. Called with the vector tile or source as `this`.\n * @param {function(this:import(\"./VectorTile.js\").default)|function(this:import(\"./source/Vector\").default)} failure\n *     Function called when loading failed. Called with the vector tile or\n *     source as `this`.\n * @return {FeatureLoader} The feature loader.\n */\nexport function loadFeaturesXhr(url, format, success, failure) {\n  return (\n    /**\n     * @param {import(\"./extent.js\").Extent} extent Extent.\n     * @param {number} resolution Resolution.\n     * @param {import(\"./proj/Projection.js\").default} projection Projection.\n     * @this {import(\"./source/Vector\").default|import(\"./VectorTile.js\").default}\n     */\n    function(extent, resolution, projection) {\n      var xhr = new XMLHttpRequest();\n      xhr.open('GET',\n        typeof url === 'function' ? url(extent, resolution, projection) : url,\n        true);\n      if (format.getType() == FormatType.ARRAY_BUFFER) {\n        xhr.responseType = 'arraybuffer';\n      }\n      /**\n       * @param {Event} event Event.\n       * @private\n       */\n      xhr.onload = function(event) {\n        // status will be 0 for file:// urls\n        if (!xhr.status || xhr.status >= 200 && xhr.status < 300) {\n          var type = format.getType();\n          /** @type {Document|Node|Object|string|undefined} */\n          var source;\n          if (type == FormatType.JSON || type == FormatType.TEXT) {\n            source = xhr.responseText;\n          } else if (type == FormatType.XML) {\n            source = xhr.responseXML;\n            if (!source) {\n              source = new DOMParser().parseFromString(xhr.responseText, 'application/xml');\n            }\n          } else if (type == FormatType.ARRAY_BUFFER) {\n            source = /** @type {ArrayBuffer} */ (xhr.response);\n          }\n          if (source) {\n            success.call(this, format.readFeatures(source,\n              {featureProjection: projection}),\n            format.readProjection(source), format.getLastExtent());\n          } else {\n            failure.call(this);\n          }\n        } else {\n          failure.call(this);\n        }\n      }.bind(this);\n      /**\n       * @private\n       */\n      xhr.onerror = function() {\n        failure.call(this);\n      }.bind(this);\n      xhr.send();\n    }\n  );\n}\n\n\n/**\n * Create an XHR feature loader for a `url` and `format`. The feature loader\n * loads features (with XHR), parses the features, and adds them to the\n * vector source.\n * @param {string|FeatureUrlFunction} url Feature URL service.\n * @param {import(\"./format/Feature.js\").default} format Feature format.\n * @return {FeatureLoader} The feature loader.\n * @api\n */\nexport function xhr(url, format) {\n  return loadFeaturesXhr(url, format,\n    /**\n     * @param {Array<import(\"./Feature.js\").default>} features The loaded features.\n     * @param {import(\"./proj/Projection.js\").default} dataProjection Data\n     * projection.\n     * @this {import(\"./source/Vector\").default|import(\"./VectorTile.js\").default}\n     */\n    function(features, dataProjection) {\n      var sourceOrTile = /** @type {?} */ (this);\n      if (typeof sourceOrTile.addFeatures === 'function') {\n        /** @type {import(\"./source/Vector\").default} */ (sourceOrTile).addFeatures(features);\n      }\n    }, /* FIXME handle error */ VOID);\n}\n\n//# sourceMappingURL=featureloader.js.map","/**\n * @module ol/source/VectorEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  /**\n   * Triggered when a feature is added to the source.\n   * @event ol/source/Vector.VectorSourceEvent#addfeature\n   * @api\n   */\n  ADDFEATURE: 'addfeature',\n\n  /**\n   * Triggered when a feature is updated.\n   * @event ol/source/Vector.VectorSourceEvent#changefeature\n   * @api\n   */\n  CHANGEFEATURE: 'changefeature',\n\n  /**\n   * Triggered when the clear method is called on the source.\n   * @event ol/source/Vector.VectorSourceEvent#clear\n   * @api\n   */\n  CLEAR: 'clear',\n\n  /**\n   * Triggered when a feature is removed from the source.\n   * See {@link module:ol/source/Vector#clear source.clear()} for exceptions.\n   * @event ol/source/Vector.VectorSourceEvent#removefeature\n   * @api\n   */\n  REMOVEFEATURE: 'removefeature'\n};\n\n//# sourceMappingURL=VectorEventType.js.map","/**\n * @module ol/source/Vector\n */\n\nimport {getUid} from '../util.js';\nimport Collection from '../Collection.js';\nimport CollectionEventType from '../CollectionEventType.js';\nimport ObjectEventType from '../ObjectEventType.js';\nimport {extend} from '../array.js';\nimport {assert} from '../asserts.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport Event from '../events/Event.js';\nimport EventType from '../events/EventType.js';\nimport {containsExtent, equals} from '../extent.js';\nimport {xhr} from '../featureloader.js';\nimport {TRUE, VOID} from '../functions.js';\nimport {all as allStrategy} from '../loadingstrategy.js';\nimport {isEmpty, getValues} from '../obj.js';\nimport Source from './Source.js';\nimport SourceState from './State.js';\nimport VectorEventType from './VectorEventType.js';\nimport RBush from '../structs/RBush.js';\n\n/**\n * A function that takes an {@link module:ol/extent~Extent} and a resolution as arguments, and\n * returns an array of {@link module:ol/extent~Extent} with the extents to load. Usually this\n * is one of the standard {@link module:ol/loadingstrategy} strategies.\n *\n * @typedef {function(import(\"../extent.js\").Extent, number): Array<import(\"../extent.js\").Extent>} LoadingStrategy\n * @api\n */\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/source/Vector} instances are instances of this\n * type.\n */\nexport var VectorSourceEvent = /*@__PURE__*/(function (Event) {\n  function VectorSourceEvent(type, opt_feature) {\n\n    Event.call(this, type);\n\n    /**\n     * The feature being added or removed.\n     * @type {import(\"../Feature.js\").default|undefined}\n     * @api\n     */\n    this.feature = opt_feature;\n\n  }\n\n  if ( Event ) VectorSourceEvent.__proto__ = Event;\n  VectorSourceEvent.prototype = Object.create( Event && Event.prototype );\n  VectorSourceEvent.prototype.constructor = VectorSourceEvent;\n\n  return VectorSourceEvent;\n}(Event));\n\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {Array<import(\"../Feature.js\").default>|Collection<import(\"../Feature.js\").default>} [features]\n * Features. If provided as {@link module:ol/Collection}, the features in the source\n * and the collection will stay in sync.\n * @property {import(\"../format/Feature.js\").default} [format] The feature format used by the XHR\n * feature loader when `url` is set. Required if `url` is set, otherwise ignored.\n * @property {import(\"../featureloader.js\").FeatureLoader} [loader]\n * The loader function used to load features, from a remote source for example.\n * If this is not set and `url` is set, the source will create and use an XHR\n * feature loader.\n *\n * Example:\n *\n * ```js\n * import {Vector} from 'ol/source';\n * import {GeoJSON} from 'ol/format';\n * import {bbox} from 'ol/loadingstrategy';\n *\n * var vectorSource = new Vector({\n *   format: new GeoJSON(),\n *   loader: function(extent, resolution, projection) {\n *      var proj = projection.getCode();\n *      var url = 'https://ahocevar.com/geoserver/wfs?service=WFS&' +\n *          'version=1.1.0&request=GetFeature&typename=osm:water_areas&' +\n *          'outputFormat=application/json&srsname=' + proj + '&' +\n *          'bbox=' + extent.join(',') + ',' + proj;\n *      var xhr = new XMLHttpRequest();\n *      xhr.open('GET', url);\n *      var onError = function() {\n *        vectorSource.removeLoadedExtent(extent);\n *      }\n *      xhr.onerror = onError;\n *      xhr.onload = function() {\n *        if (xhr.status == 200) {\n *          vectorSource.addFeatures(\n *              vectorSource.getFormat().readFeatures(xhr.responseText));\n *        } else {\n *          onError();\n *        }\n *      }\n *      xhr.send();\n *    },\n *    strategy: bbox\n *  });\n * ```\n * @property {boolean} [overlaps=true] This source may have overlapping geometries.\n * Setting this to `false` (e.g. for sources with polygons that represent administrative\n * boundaries or TopoJSON sources) allows the renderer to optimise fill and\n * stroke operations.\n * @property {LoadingStrategy} [strategy] The loading strategy to use.\n * By default an {@link module:ol/loadingstrategy~all}\n * strategy is used, a one-off strategy which loads all features at once.\n * @property {string|import(\"../featureloader.js\").FeatureUrlFunction} [url]\n * Setting this option instructs the source to load features using an XHR loader\n * (see {@link module:ol/featureloader~xhr}). Use a `string` and an\n * {@link module:ol/loadingstrategy~all} for a one-off download of all features from\n * the given URL. Use a {@link module:ol/featureloader~FeatureUrlFunction} to generate the url with\n * other loading strategies.\n * Requires `format` to be set as well.\n * When default XHR feature loader is provided, the features will\n * be transformed from the data projection to the view projection\n * during parsing. If your remote data source does not advertise its projection\n * properly, this transformation will be incorrect. For some formats, the\n * default projection (usually EPSG:4326) can be overridden by setting the\n * dataProjection constructor option on the format.\n * Note that if a source contains non-feature data, such as a GeoJSON geometry\n * or a KML NetworkLink, these will be ignored. Use a custom loader to load these.\n * @property {boolean} [useSpatialIndex=true]\n * By default, an RTree is used as spatial index. When features are removed and\n * added frequently, and the total number of features is low, setting this to\n * `false` may improve performance.\n *\n * Note that\n * {@link module:ol/source/Vector~VectorSource#getFeaturesInExtent},\n * {@link module:ol/source/Vector~VectorSource#getClosestFeatureToCoordinate} and\n * {@link module:ol/source/Vector~VectorSource#getExtent} cannot be used when `useSpatialIndex` is\n * set to `false`, and {@link module:ol/source/Vector~VectorSource#forEachFeatureInExtent} will loop\n * through all features.\n *\n * When set to `false`, the features will be maintained in an\n * {@link module:ol/Collection}, which can be retrieved through\n * {@link module:ol/source/Vector~VectorSource#getFeaturesCollection}.\n * @property {boolean} [wrapX=true] Wrap the world horizontally. For vector editing across the\n * -180° and 180° meridians to work properly, this should be set to `false`. The\n * resulting geometry coordinates will then exceed the world bounds.\n */\n\n\n/**\n * @classdesc\n * Provides a source of features for vector layers. Vector features provided\n * by this source are suitable for editing. See {@link module:ol/source/VectorTile~VectorTile} for\n * vector data that is optimized for rendering.\n *\n * @fires ol/source/Vector.VectorSourceEvent\n * @api\n */\nvar VectorSource = /*@__PURE__*/(function (Source) {\n  function VectorSource(opt_options) {\n\n    var options = opt_options || {};\n\n    Source.call(this, {\n      attributions: options.attributions,\n      projection: undefined,\n      state: SourceState.READY,\n      wrapX: options.wrapX !== undefined ? options.wrapX : true\n    });\n\n    /**\n     * @private\n     * @type {import(\"../featureloader.js\").FeatureLoader}\n     */\n    this.loader_ = VOID;\n\n    /**\n     * @private\n     * @type {import(\"../format/Feature.js\").default|undefined}\n     */\n    this.format_ = options.format;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.overlaps_ = options.overlaps == undefined ? true : options.overlaps;\n\n    /**\n     * @private\n     * @type {string|import(\"../featureloader.js\").FeatureUrlFunction|undefined}\n     */\n    this.url_ = options.url;\n\n    if (options.loader !== undefined) {\n      this.loader_ = options.loader;\n    } else if (this.url_ !== undefined) {\n      assert(this.format_, 7); // `format` must be set when `url` is set\n      // create a XHR feature loader for \"url\" and \"format\"\n      this.loader_ = xhr(this.url_, /** @type {import(\"../format/Feature.js\").default} */ (this.format_));\n    }\n\n    /**\n     * @private\n     * @type {LoadingStrategy}\n     */\n    this.strategy_ = options.strategy !== undefined ? options.strategy : allStrategy;\n\n    var useSpatialIndex =\n        options.useSpatialIndex !== undefined ? options.useSpatialIndex : true;\n\n    /**\n     * @private\n     * @type {RBush<import(\"../Feature.js\").default>}\n     */\n    this.featuresRtree_ = useSpatialIndex ? new RBush() : null;\n\n    /**\n     * @private\n     * @type {RBush<{extent: import(\"../extent.js\").Extent}>}\n     */\n    this.loadedExtentsRtree_ = new RBush();\n\n    /**\n     * @private\n     * @type {!Object<string, import(\"../Feature.js\").default>}\n     */\n    this.nullGeometryFeatures_ = {};\n\n    /**\n     * A lookup of features by id (the return from feature.getId()).\n     * @private\n     * @type {!Object<string, import(\"../Feature.js\").default>}\n     */\n    this.idIndex_ = {};\n\n    /**\n     * A lookup of features without id (keyed by getUid(feature)).\n     * @private\n     * @type {!Object<string, import(\"../Feature.js\").default>}\n     */\n    this.undefIdIndex_ = {};\n\n    /**\n     * @private\n     * @type {Object<string, Array<import(\"../events.js\").EventsKey>>}\n     */\n    this.featureChangeKeys_ = {};\n\n    /**\n     * @private\n     * @type {Collection<import(\"../Feature.js\").default>}\n     */\n    this.featuresCollection_ = null;\n\n    var collection, features;\n    if (Array.isArray(options.features)) {\n      features = options.features;\n    } else if (options.features) {\n      collection = options.features;\n      features = collection.getArray();\n    }\n    if (!useSpatialIndex && collection === undefined) {\n      collection = new Collection(features);\n    }\n    if (features !== undefined) {\n      this.addFeaturesInternal(features);\n    }\n    if (collection !== undefined) {\n      this.bindFeaturesCollection_(collection);\n    }\n\n  }\n\n  if ( Source ) VectorSource.__proto__ = Source;\n  VectorSource.prototype = Object.create( Source && Source.prototype );\n  VectorSource.prototype.constructor = VectorSource;\n\n  /**\n   * Add a single feature to the source.  If you want to add a batch of features\n   * at once, call {@link module:ol/source/Vector~VectorSource#addFeatures #addFeatures()}\n   * instead. A feature will not be added to the source if feature with\n   * the same id is already there. The reason for this behavior is to avoid\n   * feature duplication when using bbox or tile loading strategies.\n   * @param {import(\"../Feature.js\").default} feature Feature to add.\n   * @api\n   */\n  VectorSource.prototype.addFeature = function addFeature (feature) {\n    this.addFeatureInternal(feature);\n    this.changed();\n  };\n\n\n  /**\n   * Add a feature without firing a `change` event.\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @protected\n   */\n  VectorSource.prototype.addFeatureInternal = function addFeatureInternal (feature) {\n    var featureKey = getUid(feature);\n\n    if (!this.addToIndex_(featureKey, feature)) {\n      return;\n    }\n\n    this.setupChangeEvents_(featureKey, feature);\n\n    var geometry = feature.getGeometry();\n    if (geometry) {\n      var extent = geometry.getExtent();\n      if (this.featuresRtree_) {\n        this.featuresRtree_.insert(extent, feature);\n      }\n    } else {\n      this.nullGeometryFeatures_[featureKey] = feature;\n    }\n\n    this.dispatchEvent(\n      new VectorSourceEvent(VectorEventType.ADDFEATURE, feature));\n  };\n\n\n  /**\n   * @param {string} featureKey Unique identifier for the feature.\n   * @param {import(\"../Feature.js\").default} feature The feature.\n   * @private\n   */\n  VectorSource.prototype.setupChangeEvents_ = function setupChangeEvents_ (featureKey, feature) {\n    this.featureChangeKeys_[featureKey] = [\n      listen(feature, EventType.CHANGE,\n        this.handleFeatureChange_, this),\n      listen(feature, ObjectEventType.PROPERTYCHANGE,\n        this.handleFeatureChange_, this)\n    ];\n  };\n\n\n  /**\n   * @param {string} featureKey Unique identifier for the feature.\n   * @param {import(\"../Feature.js\").default} feature The feature.\n   * @return {boolean} The feature is \"valid\", in the sense that it is also a\n   *     candidate for insertion into the Rtree.\n   * @private\n   */\n  VectorSource.prototype.addToIndex_ = function addToIndex_ (featureKey, feature) {\n    var valid = true;\n    var id = feature.getId();\n    if (id !== undefined) {\n      if (!(id.toString() in this.idIndex_)) {\n        this.idIndex_[id.toString()] = feature;\n      } else {\n        valid = false;\n      }\n    } else {\n      assert(!(featureKey in this.undefIdIndex_),\n        30); // The passed `feature` was already added to the source\n      this.undefIdIndex_[featureKey] = feature;\n    }\n    return valid;\n  };\n\n\n  /**\n   * Add a batch of features to the source.\n   * @param {Array<import(\"../Feature.js\").default>} features Features to add.\n   * @api\n   */\n  VectorSource.prototype.addFeatures = function addFeatures (features) {\n    this.addFeaturesInternal(features);\n    this.changed();\n  };\n\n\n  /**\n   * Add features without firing a `change` event.\n   * @param {Array<import(\"../Feature.js\").default>} features Features.\n   * @protected\n   */\n  VectorSource.prototype.addFeaturesInternal = function addFeaturesInternal (features) {\n    var extents = [];\n    var newFeatures = [];\n    var geometryFeatures = [];\n\n    for (var i = 0, length = features.length; i < length; i++) {\n      var feature = features[i];\n      var featureKey = getUid(feature);\n      if (this.addToIndex_(featureKey, feature)) {\n        newFeatures.push(feature);\n      }\n    }\n\n    for (var i$1 = 0, length$1 = newFeatures.length; i$1 < length$1; i$1++) {\n      var feature$1 = newFeatures[i$1];\n      var featureKey$1 = getUid(feature$1);\n      this.setupChangeEvents_(featureKey$1, feature$1);\n\n      var geometry = feature$1.getGeometry();\n      if (geometry) {\n        var extent = geometry.getExtent();\n        extents.push(extent);\n        geometryFeatures.push(feature$1);\n      } else {\n        this.nullGeometryFeatures_[featureKey$1] = feature$1;\n      }\n    }\n    if (this.featuresRtree_) {\n      this.featuresRtree_.load(extents, geometryFeatures);\n    }\n\n    for (var i$2 = 0, length$2 = newFeatures.length; i$2 < length$2; i$2++) {\n      this.dispatchEvent(new VectorSourceEvent(VectorEventType.ADDFEATURE, newFeatures[i$2]));\n    }\n  };\n\n\n  /**\n   * @param {!Collection<import(\"../Feature.js\").default>} collection Collection.\n   * @private\n   */\n  VectorSource.prototype.bindFeaturesCollection_ = function bindFeaturesCollection_ (collection) {\n    var modifyingCollection = false;\n    listen(this, VectorEventType.ADDFEATURE,\n      /**\n       * @param {VectorSourceEvent} evt The vector source event\n       */\n      function(evt) {\n        if (!modifyingCollection) {\n          modifyingCollection = true;\n          collection.push(evt.feature);\n          modifyingCollection = false;\n        }\n      });\n    listen(this, VectorEventType.REMOVEFEATURE,\n      /**\n       * @param {VectorSourceEvent} evt The vector source event\n       */\n      function(evt) {\n        if (!modifyingCollection) {\n          modifyingCollection = true;\n          collection.remove(evt.feature);\n          modifyingCollection = false;\n        }\n      });\n    listen(collection, CollectionEventType.ADD,\n      /**\n       * @param {import(\"../Collection.js\").CollectionEvent} evt The collection event\n       */\n      function(evt) {\n        if (!modifyingCollection) {\n          modifyingCollection = true;\n          this.addFeature(/** @type {import(\"../Feature.js\").default} */ (evt.element));\n          modifyingCollection = false;\n        }\n      }, this);\n    listen(collection, CollectionEventType.REMOVE,\n      /**\n       * @param {import(\"../Collection.js\").CollectionEvent} evt The collection event\n       */\n      function(evt) {\n        if (!modifyingCollection) {\n          modifyingCollection = true;\n          this.removeFeature(/** @type {import(\"../Feature.js\").default} */ (evt.element));\n          modifyingCollection = false;\n        }\n      }, this);\n    this.featuresCollection_ = collection;\n  };\n\n\n  /**\n   * Remove all features from the source.\n   * @param {boolean=} opt_fast Skip dispatching of {@link module:ol/source/Vector.VectorSourceEvent#removefeature} events.\n   * @api\n   */\n  VectorSource.prototype.clear = function clear (opt_fast) {\n    if (opt_fast) {\n      for (var featureId in this.featureChangeKeys_) {\n        var keys = this.featureChangeKeys_[featureId];\n        keys.forEach(unlistenByKey);\n      }\n      if (!this.featuresCollection_) {\n        this.featureChangeKeys_ = {};\n        this.idIndex_ = {};\n        this.undefIdIndex_ = {};\n      }\n    } else {\n      if (this.featuresRtree_) {\n        this.featuresRtree_.forEach(this.removeFeatureInternal, this);\n        for (var id in this.nullGeometryFeatures_) {\n          this.removeFeatureInternal(this.nullGeometryFeatures_[id]);\n        }\n      }\n    }\n    if (this.featuresCollection_) {\n      this.featuresCollection_.clear();\n    }\n\n    if (this.featuresRtree_) {\n      this.featuresRtree_.clear();\n    }\n    this.loadedExtentsRtree_.clear();\n    this.nullGeometryFeatures_ = {};\n\n    var clearEvent = new VectorSourceEvent(VectorEventType.CLEAR);\n    this.dispatchEvent(clearEvent);\n    this.changed();\n  };\n\n\n  /**\n   * Iterate through all features on the source, calling the provided callback\n   * with each one.  If the callback returns any \"truthy\" value, iteration will\n   * stop and the function will return the same value.\n   * Note: this function only iterate through the feature that have a defined geometry.\n   *\n   * @param {function(import(\"../Feature.js\").default): T} callback Called with each feature\n   *     on the source.  Return a truthy value to stop iteration.\n   * @return {T|undefined} The return value from the last call to the callback.\n   * @template T\n   * @api\n   */\n  VectorSource.prototype.forEachFeature = function forEachFeature (callback) {\n    if (this.featuresRtree_) {\n      return this.featuresRtree_.forEach(callback);\n    } else if (this.featuresCollection_) {\n      this.featuresCollection_.forEach(callback);\n    }\n  };\n\n\n  /**\n   * Iterate through all features whose geometries contain the provided\n   * coordinate, calling the callback with each feature.  If the callback returns\n   * a \"truthy\" value, iteration will stop and the function will return the same\n   * value.\n   *\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {function(import(\"../Feature.js\").default): T} callback Called with each feature\n   *     whose goemetry contains the provided coordinate.\n   * @return {T|undefined} The return value from the last call to the callback.\n   * @template T\n   */\n  VectorSource.prototype.forEachFeatureAtCoordinateDirect = function forEachFeatureAtCoordinateDirect (coordinate, callback) {\n    var extent = [coordinate[0], coordinate[1], coordinate[0], coordinate[1]];\n    return this.forEachFeatureInExtent(extent, function(feature) {\n      var geometry = feature.getGeometry();\n      if (geometry.intersectsCoordinate(coordinate)) {\n        return callback(feature);\n      } else {\n        return undefined;\n      }\n    });\n  };\n\n\n  /**\n   * Iterate through all features whose bounding box intersects the provided\n   * extent (note that the feature's geometry may not intersect the extent),\n   * calling the callback with each feature.  If the callback returns a \"truthy\"\n   * value, iteration will stop and the function will return the same value.\n   *\n   * If you are interested in features whose geometry intersects an extent, call\n   * the {@link module:ol/source/Vector~VectorSource#forEachFeatureIntersectingExtent #forEachFeatureIntersectingExtent()} method instead.\n   *\n   * When `useSpatialIndex` is set to false, this method will loop through all\n   * features, equivalent to {@link module:ol/source/Vector~VectorSource#forEachFeature #forEachFeature()}.\n   *\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {function(import(\"../Feature.js\").default): T} callback Called with each feature\n   *     whose bounding box intersects the provided extent.\n   * @return {T|undefined} The return value from the last call to the callback.\n   * @template T\n   * @api\n   */\n  VectorSource.prototype.forEachFeatureInExtent = function forEachFeatureInExtent (extent, callback) {\n    if (this.featuresRtree_) {\n      return this.featuresRtree_.forEachInExtent(extent, callback);\n    } else if (this.featuresCollection_) {\n      this.featuresCollection_.forEach(callback);\n    }\n  };\n\n\n  /**\n   * Iterate through all features whose geometry intersects the provided extent,\n   * calling the callback with each feature.  If the callback returns a \"truthy\"\n   * value, iteration will stop and the function will return the same value.\n   *\n   * If you only want to test for bounding box intersection, call the\n   * {@link module:ol/source/Vector~VectorSource#forEachFeatureInExtent #forEachFeatureInExtent()} method instead.\n   *\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {function(import(\"../Feature.js\").default): T} callback Called with each feature\n   *     whose geometry intersects the provided extent.\n   * @return {T|undefined} The return value from the last call to the callback.\n   * @template T\n   * @api\n   */\n  VectorSource.prototype.forEachFeatureIntersectingExtent = function forEachFeatureIntersectingExtent (extent, callback) {\n    return this.forEachFeatureInExtent(extent,\n      /**\n       * @param {import(\"../Feature.js\").default} feature Feature.\n       * @return {T|undefined} The return value from the last call to the callback.\n       */\n      function(feature) {\n        var geometry = feature.getGeometry();\n        if (geometry.intersectsExtent(extent)) {\n          var result = callback(feature);\n          if (result) {\n            return result;\n          }\n        }\n      });\n  };\n\n\n  /**\n   * Get the features collection associated with this source. Will be `null`\n   * unless the source was configured with `useSpatialIndex` set to `false`, or\n   * with an {@link module:ol/Collection} as `features`.\n   * @return {Collection<import(\"../Feature.js\").default>} The collection of features.\n   * @api\n   */\n  VectorSource.prototype.getFeaturesCollection = function getFeaturesCollection () {\n    return this.featuresCollection_;\n  };\n\n\n  /**\n   * Get all features on the source in random order.\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   * @api\n   */\n  VectorSource.prototype.getFeatures = function getFeatures () {\n    var features;\n    if (this.featuresCollection_) {\n      features = this.featuresCollection_.getArray();\n    } else if (this.featuresRtree_) {\n      features = this.featuresRtree_.getAll();\n      if (!isEmpty(this.nullGeometryFeatures_)) {\n        extend(features, getValues(this.nullGeometryFeatures_));\n      }\n    }\n    return (\n      /** @type {Array<import(\"../Feature.js\").default>} */ (features)\n    );\n  };\n\n\n  /**\n   * Get all features whose geometry intersects the provided coordinate.\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   * @api\n   */\n  VectorSource.prototype.getFeaturesAtCoordinate = function getFeaturesAtCoordinate (coordinate) {\n    var features = [];\n    this.forEachFeatureAtCoordinateDirect(coordinate, function(feature) {\n      features.push(feature);\n    });\n    return features;\n  };\n\n\n  /**\n   * Get all features in the provided extent.  Note that this returns an array of\n   * all features intersecting the given extent in random order (so it may include\n   * features whose geometries do not intersect the extent).\n   *\n   * This method is not available when the source is configured with\n   * `useSpatialIndex` set to `false`.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   * @api\n   */\n  VectorSource.prototype.getFeaturesInExtent = function getFeaturesInExtent (extent) {\n    return this.featuresRtree_.getInExtent(extent);\n  };\n\n\n  /**\n   * Get the closest feature to the provided coordinate.\n   *\n   * This method is not available when the source is configured with\n   * `useSpatialIndex` set to `false`.\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {function(import(\"../Feature.js\").default):boolean=} opt_filter Feature filter function.\n   *     The filter function will receive one argument, the {@link module:ol/Feature feature}\n   *     and it should return a boolean value. By default, no filtering is made.\n   * @return {import(\"../Feature.js\").default} Closest feature.\n   * @api\n   */\n  VectorSource.prototype.getClosestFeatureToCoordinate = function getClosestFeatureToCoordinate (coordinate, opt_filter) {\n    // Find the closest feature using branch and bound.  We start searching an\n    // infinite extent, and find the distance from the first feature found.  This\n    // becomes the closest feature.  We then compute a smaller extent which any\n    // closer feature must intersect.  We continue searching with this smaller\n    // extent, trying to find a closer feature.  Every time we find a closer\n    // feature, we update the extent being searched so that any even closer\n    // feature must intersect it.  We continue until we run out of features.\n    var x = coordinate[0];\n    var y = coordinate[1];\n    var closestFeature = null;\n    var closestPoint = [NaN, NaN];\n    var minSquaredDistance = Infinity;\n    var extent = [-Infinity, -Infinity, Infinity, Infinity];\n    var filter = opt_filter ? opt_filter : TRUE;\n    this.featuresRtree_.forEachInExtent(extent,\n      /**\n       * @param {import(\"../Feature.js\").default} feature Feature.\n       */\n      function(feature) {\n        if (filter(feature)) {\n          var geometry = feature.getGeometry();\n          var previousMinSquaredDistance = minSquaredDistance;\n          minSquaredDistance = geometry.closestPointXY(\n            x, y, closestPoint, minSquaredDistance);\n          if (minSquaredDistance < previousMinSquaredDistance) {\n            closestFeature = feature;\n            // This is sneaky.  Reduce the extent that it is currently being\n            // searched while the R-Tree traversal using this same extent object\n            // is still in progress.  This is safe because the new extent is\n            // strictly contained by the old extent.\n            var minDistance = Math.sqrt(minSquaredDistance);\n            extent[0] = x - minDistance;\n            extent[1] = y - minDistance;\n            extent[2] = x + minDistance;\n            extent[3] = y + minDistance;\n          }\n        }\n      });\n    return closestFeature;\n  };\n\n\n  /**\n   * Get the extent of the features currently in the source.\n   *\n   * This method is not available when the source is configured with\n   * `useSpatialIndex` set to `false`.\n   * @param {import(\"../extent.js\").Extent=} opt_extent Destination extent. If provided, no new extent\n   *     will be created. Instead, that extent's coordinates will be overwritten.\n   * @return {import(\"../extent.js\").Extent} Extent.\n   * @api\n   */\n  VectorSource.prototype.getExtent = function getExtent (opt_extent) {\n    return this.featuresRtree_.getExtent(opt_extent);\n  };\n\n\n  /**\n   * Get a feature by its identifier (the value returned by feature.getId()).\n   * Note that the index treats string and numeric identifiers as the same.  So\n   * `source.getFeatureById(2)` will return a feature with id `'2'` or `2`.\n   *\n   * @param {string|number} id Feature identifier.\n   * @return {import(\"../Feature.js\").default} The feature (or `null` if not found).\n   * @api\n   */\n  VectorSource.prototype.getFeatureById = function getFeatureById (id) {\n    var feature = this.idIndex_[id.toString()];\n    return feature !== undefined ? feature : null;\n  };\n\n\n  /**\n   * Get the format associated with this source.\n   *\n   * @return {import(\"../format/Feature.js\").default|undefined} The feature format.\n   * @api\n   */\n  VectorSource.prototype.getFormat = function getFormat () {\n    return this.format_;\n  };\n\n\n  /**\n   * @return {boolean} The source can have overlapping geometries.\n   */\n  VectorSource.prototype.getOverlaps = function getOverlaps () {\n    return this.overlaps_;\n  };\n\n\n  /**\n   * Get the url associated with this source.\n   *\n   * @return {string|import(\"../featureloader.js\").FeatureUrlFunction|undefined} The url.\n   * @api\n   */\n  VectorSource.prototype.getUrl = function getUrl () {\n    return this.url_;\n  };\n\n\n  /**\n   * @param {Event} event Event.\n   * @private\n   */\n  VectorSource.prototype.handleFeatureChange_ = function handleFeatureChange_ (event) {\n    var feature = /** @type {import(\"../Feature.js\").default} */ (event.target);\n    var featureKey = getUid(feature);\n    var geometry = feature.getGeometry();\n    if (!geometry) {\n      if (!(featureKey in this.nullGeometryFeatures_)) {\n        if (this.featuresRtree_) {\n          this.featuresRtree_.remove(feature);\n        }\n        this.nullGeometryFeatures_[featureKey] = feature;\n      }\n    } else {\n      var extent = geometry.getExtent();\n      if (featureKey in this.nullGeometryFeatures_) {\n        delete this.nullGeometryFeatures_[featureKey];\n        if (this.featuresRtree_) {\n          this.featuresRtree_.insert(extent, feature);\n        }\n      } else {\n        if (this.featuresRtree_) {\n          this.featuresRtree_.update(extent, feature);\n        }\n      }\n    }\n    var id = feature.getId();\n    if (id !== undefined) {\n      var sid = id.toString();\n      if (featureKey in this.undefIdIndex_) {\n        delete this.undefIdIndex_[featureKey];\n        this.idIndex_[sid] = feature;\n      } else {\n        if (this.idIndex_[sid] !== feature) {\n          this.removeFromIdIndex_(feature);\n          this.idIndex_[sid] = feature;\n        }\n      }\n    } else {\n      if (!(featureKey in this.undefIdIndex_)) {\n        this.removeFromIdIndex_(feature);\n        this.undefIdIndex_[featureKey] = feature;\n      }\n    }\n    this.changed();\n    this.dispatchEvent(new VectorSourceEvent(\n      VectorEventType.CHANGEFEATURE, feature));\n  };\n\n  /**\n   * Returns true if the feature is contained within the source.\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @return {boolean} Has feature.\n   * @api\n   */\n  VectorSource.prototype.hasFeature = function hasFeature (feature) {\n    var id = feature.getId();\n    if (id !== undefined) {\n      return id in this.idIndex_;\n    } else {\n      return getUid(feature) in this.undefIdIndex_;\n    }\n  };\n\n  /**\n   * @return {boolean} Is empty.\n   */\n  VectorSource.prototype.isEmpty = function isEmpty$1 () {\n    return this.featuresRtree_.isEmpty() && isEmpty(this.nullGeometryFeatures_);\n  };\n\n\n  /**\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} resolution Resolution.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   */\n  VectorSource.prototype.loadFeatures = function loadFeatures (extent, resolution, projection) {\n    var this$1 = this;\n\n    var loadedExtentsRtree = this.loadedExtentsRtree_;\n    var extentsToLoad = this.strategy_(extent, resolution);\n    this.loading = false;\n    var loop = function ( i, ii ) {\n      var extentToLoad = extentsToLoad[i];\n      var alreadyLoaded = loadedExtentsRtree.forEachInExtent(extentToLoad,\n        /**\n         * @param {{extent: import(\"../extent.js\").Extent}} object Object.\n         * @return {boolean} Contains.\n         */\n        function(object) {\n          return containsExtent(object.extent, extentToLoad);\n        });\n      if (!alreadyLoaded) {\n        this$1.loader_.call(this$1, extentToLoad, resolution, projection);\n        loadedExtentsRtree.insert(extentToLoad, {extent: extentToLoad.slice()});\n        this$1.loading = this$1.loader_ !== VOID;\n      }\n    };\n\n    for (var i = 0, ii = extentsToLoad.length; i < ii; ++i) loop( i, ii );\n  };\n\n\n  /**\n   * Remove an extent from the list of loaded extents.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @api\n   */\n  VectorSource.prototype.removeLoadedExtent = function removeLoadedExtent (extent) {\n    var loadedExtentsRtree = this.loadedExtentsRtree_;\n    var obj;\n    loadedExtentsRtree.forEachInExtent(extent, function(object) {\n      if (equals(object.extent, extent)) {\n        obj = object;\n        return true;\n      }\n    });\n    if (obj) {\n      loadedExtentsRtree.remove(obj);\n    }\n  };\n\n\n  /**\n   * Remove a single feature from the source.  If you want to remove all features\n   * at once, use the {@link module:ol/source/Vector~VectorSource#clear #clear()} method\n   * instead.\n   * @param {import(\"../Feature.js\").default} feature Feature to remove.\n   * @api\n   */\n  VectorSource.prototype.removeFeature = function removeFeature (feature) {\n    var featureKey = getUid(feature);\n    if (featureKey in this.nullGeometryFeatures_) {\n      delete this.nullGeometryFeatures_[featureKey];\n    } else {\n      if (this.featuresRtree_) {\n        this.featuresRtree_.remove(feature);\n      }\n    }\n    this.removeFeatureInternal(feature);\n    this.changed();\n  };\n\n\n  /**\n   * Remove feature without firing a `change` event.\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @protected\n   */\n  VectorSource.prototype.removeFeatureInternal = function removeFeatureInternal (feature) {\n    var featureKey = getUid(feature);\n    this.featureChangeKeys_[featureKey].forEach(unlistenByKey);\n    delete this.featureChangeKeys_[featureKey];\n    var id = feature.getId();\n    if (id !== undefined) {\n      delete this.idIndex_[id.toString()];\n    } else {\n      delete this.undefIdIndex_[featureKey];\n    }\n    this.dispatchEvent(new VectorSourceEvent(\n      VectorEventType.REMOVEFEATURE, feature));\n  };\n\n\n  /**\n   * Remove a feature from the id index.  Called internally when the feature id\n   * may have changed.\n   * @param {import(\"../Feature.js\").default} feature The feature.\n   * @return {boolean} Removed the feature from the index.\n   * @private\n   */\n  VectorSource.prototype.removeFromIdIndex_ = function removeFromIdIndex_ (feature) {\n    var removed = false;\n    for (var id in this.idIndex_) {\n      if (this.idIndex_[id] === feature) {\n        delete this.idIndex_[id];\n        removed = true;\n        break;\n      }\n    }\n    return removed;\n  };\n\n\n  /**\n   * Set the new loader of the source. The next loadFeatures call will use the\n   * new loader.\n   * @param {import(\"../featureloader.js\").FeatureLoader} loader The loader to set.\n   * @api\n   */\n  VectorSource.prototype.setLoader = function setLoader (loader) {\n    this.loader_ = loader;\n  };\n\n  return VectorSource;\n}(Source));\n\n\nexport default VectorSource;\n\n//# sourceMappingURL=Vector.js.map","/**\n * @module ol/Feature\n */\nimport {assert} from './asserts.js';\nimport {listen, unlisten, unlistenByKey} from './events.js';\nimport EventType from './events/EventType.js';\nimport BaseObject, {getChangeEventType} from './Object.js';\n\n/**\n * @typedef {typeof Feature|typeof import(\"./render/Feature.js\").default} FeatureClass\n */\n\n/**\n * @typedef {Feature|import(\"./render/Feature.js\").default} FeatureLike\n */\n\n/**\n * @classdesc\n * A vector object for geographic features with a geometry and other\n * attribute properties, similar to the features in vector file formats like\n * GeoJSON.\n *\n * Features can be styled individually with `setStyle`; otherwise they use the\n * style of their vector layer.\n *\n * Note that attribute properties are set as {@link module:ol/Object} properties on\n * the feature object, so they are observable, and have get/set accessors.\n *\n * Typically, a feature has a single geometry property. You can set the\n * geometry using the `setGeometry` method and get it with `getGeometry`.\n * It is possible to store more than one geometry on a feature using attribute\n * properties. By default, the geometry used for rendering is identified by\n * the property name `geometry`. If you want to use another geometry property\n * for rendering, use the `setGeometryName` method to change the attribute\n * property associated with the geometry for the feature.  For example:\n *\n * ```js\n *\n * import Feature from 'ol/Feature';\n * import Polygon from 'ol/geom/Polygon';\n * import Point from 'ol/geom/Point';\n *\n * var feature = new Feature({\n *   geometry: new Polygon(polyCoords),\n *   labelPoint: new Point(labelCoords),\n *   name: 'My Polygon'\n * });\n *\n * // get the polygon geometry\n * var poly = feature.getGeometry();\n *\n * // Render the feature as a point using the coordinates from labelPoint\n * feature.setGeometryName('labelPoint');\n *\n * // get the point geometry\n * var point = feature.getGeometry();\n * ```\n *\n * @api\n */\nvar Feature = /*@__PURE__*/(function (BaseObject) {\n  function Feature(opt_geometryOrProperties) {\n\n    BaseObject.call(this);\n\n    /**\n     * @private\n     * @type {number|string|undefined}\n     */\n    this.id_ = undefined;\n\n    /**\n     * @type {string}\n     * @private\n     */\n    this.geometryName_ = 'geometry';\n\n    /**\n     * User provided style.\n     * @private\n     * @type {import(\"./style/Style.js\").StyleLike}\n     */\n    this.style_ = null;\n\n    /**\n     * @private\n     * @type {import(\"./style/Style.js\").StyleFunction|undefined}\n     */\n    this.styleFunction_ = undefined;\n\n    /**\n     * @private\n     * @type {?import(\"./events.js\").EventsKey}\n     */\n    this.geometryChangeKey_ = null;\n\n    listen(\n      this, getChangeEventType(this.geometryName_),\n      this.handleGeometryChanged_, this);\n\n    if (opt_geometryOrProperties) {\n      if (typeof /** @type {?} */ (opt_geometryOrProperties).getSimplifiedGeometry === 'function') {\n        var geometry = /** @type {import(\"./geom/Geometry.js\").default} */ (opt_geometryOrProperties);\n        this.setGeometry(geometry);\n      } else {\n        /** @type {Object<string, *>} */\n        var properties = opt_geometryOrProperties;\n        this.setProperties(properties);\n      }\n    }\n  }\n\n  if ( BaseObject ) Feature.__proto__ = BaseObject;\n  Feature.prototype = Object.create( BaseObject && BaseObject.prototype );\n  Feature.prototype.constructor = Feature;\n\n  /**\n   * Clone this feature. If the original feature has a geometry it\n   * is also cloned. The feature id is not set in the clone.\n   * @return {Feature} The clone.\n   * @api\n   */\n  Feature.prototype.clone = function clone () {\n    var clone = new Feature(this.getProperties());\n    clone.setGeometryName(this.getGeometryName());\n    var geometry = this.getGeometry();\n    if (geometry) {\n      clone.setGeometry(geometry.clone());\n    }\n    var style = this.getStyle();\n    if (style) {\n      clone.setStyle(style);\n    }\n    return clone;\n  };\n\n  /**\n   * Get the feature's default geometry.  A feature may have any number of named\n   * geometries.  The \"default\" geometry (the one that is rendered by default) is\n   * set when calling {@link module:ol/Feature~Feature#setGeometry}.\n   * @return {import(\"./geom/Geometry.js\").default|undefined} The default geometry for the feature.\n   * @api\n   * @observable\n   */\n  Feature.prototype.getGeometry = function getGeometry () {\n    return (\n      /** @type {import(\"./geom/Geometry.js\").default|undefined} */ (this.get(this.geometryName_))\n    );\n  };\n\n  /**\n   * Get the feature identifier.  This is a stable identifier for the feature and\n   * is either set when reading data from a remote source or set explicitly by\n   * calling {@link module:ol/Feature~Feature#setId}.\n   * @return {number|string|undefined} Id.\n   * @api\n   */\n  Feature.prototype.getId = function getId () {\n    return this.id_;\n  };\n\n  /**\n   * Get the name of the feature's default geometry.  By default, the default\n   * geometry is named `geometry`.\n   * @return {string} Get the property name associated with the default geometry\n   *     for this feature.\n   * @api\n   */\n  Feature.prototype.getGeometryName = function getGeometryName () {\n    return this.geometryName_;\n  };\n\n  /**\n   * Get the feature's style. Will return what was provided to the\n   * {@link module:ol/Feature~Feature#setStyle} method.\n   * @return {import(\"./style/Style.js\").StyleLike} The feature style.\n   * @api\n   */\n  Feature.prototype.getStyle = function getStyle () {\n    return this.style_;\n  };\n\n  /**\n   * Get the feature's style function.\n   * @return {import(\"./style/Style.js\").StyleFunction|undefined} Return a function\n   * representing the current style of this feature.\n   * @api\n   */\n  Feature.prototype.getStyleFunction = function getStyleFunction () {\n    return this.styleFunction_;\n  };\n\n  /**\n   * @private\n   */\n  Feature.prototype.handleGeometryChange_ = function handleGeometryChange_ () {\n    this.changed();\n  };\n\n  /**\n   * @private\n   */\n  Feature.prototype.handleGeometryChanged_ = function handleGeometryChanged_ () {\n    if (this.geometryChangeKey_) {\n      unlistenByKey(this.geometryChangeKey_);\n      this.geometryChangeKey_ = null;\n    }\n    var geometry = this.getGeometry();\n    if (geometry) {\n      this.geometryChangeKey_ = listen(geometry,\n        EventType.CHANGE, this.handleGeometryChange_, this);\n    }\n    this.changed();\n  };\n\n  /**\n   * Set the default geometry for the feature.  This will update the property\n   * with the name returned by {@link module:ol/Feature~Feature#getGeometryName}.\n   * @param {import(\"./geom/Geometry.js\").default|undefined} geometry The new geometry.\n   * @api\n   * @observable\n   */\n  Feature.prototype.setGeometry = function setGeometry (geometry) {\n    this.set(this.geometryName_, geometry);\n  };\n\n  /**\n   * Set the style for the feature.  This can be a single style object, an array\n   * of styles, or a function that takes a resolution and returns an array of\n   * styles. If it is `null` the feature has no style (a `null` style).\n   * @param {import(\"./style/Style.js\").StyleLike} style Style for this feature.\n   * @api\n   * @fires module:ol/events/Event~Event#event:change\n   */\n  Feature.prototype.setStyle = function setStyle (style) {\n    this.style_ = style;\n    this.styleFunction_ = !style ? undefined : createStyleFunction(style);\n    this.changed();\n  };\n\n  /**\n   * Set the feature id.  The feature id is considered stable and may be used when\n   * requesting features or comparing identifiers returned from a remote source.\n   * The feature id can be used with the\n   * {@link module:ol/source/Vector~VectorSource#getFeatureById} method.\n   * @param {number|string|undefined} id The feature id.\n   * @api\n   * @fires module:ol/events/Event~Event#event:change\n   */\n  Feature.prototype.setId = function setId (id) {\n    this.id_ = id;\n    this.changed();\n  };\n\n  /**\n   * Set the property name to be used when getting the feature's default geometry.\n   * When calling {@link module:ol/Feature~Feature#getGeometry}, the value of the property with\n   * this name will be returned.\n   * @param {string} name The property name of the default geometry.\n   * @api\n   */\n  Feature.prototype.setGeometryName = function setGeometryName (name) {\n    unlisten(\n      this, getChangeEventType(this.geometryName_),\n      this.handleGeometryChanged_, this);\n    this.geometryName_ = name;\n    listen(\n      this, getChangeEventType(this.geometryName_),\n      this.handleGeometryChanged_, this);\n    this.handleGeometryChanged_();\n  };\n\n  return Feature;\n}(BaseObject));\n\n\n/**\n * Convert the provided object into a feature style function.  Functions passed\n * through unchanged.  Arrays of Style or single style objects wrapped\n * in a new feature style function.\n * @param {!import(\"./style/Style.js\").StyleFunction|!Array<import(\"./style/Style.js\").default>|!import(\"./style/Style.js\").default} obj\n *     A feature style function, a single style, or an array of styles.\n * @return {import(\"./style/Style.js\").StyleFunction} A style function.\n */\nexport function createStyleFunction(obj) {\n  if (typeof obj === 'function') {\n    return obj;\n  } else {\n    /**\n     * @type {Array<import(\"./style/Style.js\").default>}\n     */\n    var styles;\n    if (Array.isArray(obj)) {\n      styles = obj;\n    } else {\n      assert(typeof /** @type {?} */ (obj).getZIndex === 'function',\n        41); // Expected an `import(\"./style/Style.js\").Style` or an array of `import(\"./style/Style.js\").Style`\n      var style = /** @type {import(\"./style/Style.js\").default} */ (obj);\n      styles = [style];\n    }\n    return function() {\n      return styles;\n    };\n  }\n}\nexport default Feature;\n\n//# sourceMappingURL=Feature.js.map","/**\n * @module ol/format/Feature\n */\nimport {assign} from '../obj.js';\nimport {abstract} from '../util.js';\nimport {get as getProjection, equivalent as equivalentProjection, transformExtent} from '../proj.js';\n\n\n/**\n * @typedef {Object} ReadOptions\n * @property {import(\"../proj.js\").ProjectionLike} [dataProjection] Projection of the data we are reading.\n * If not provided, the projection will be derived from the data (where possible) or\n * the `dataProjection` of the format is assigned (where set). If the projection\n * can not be derived from the data and if no `dataProjection` is set for a format,\n * the features will not be reprojected.\n * @property {import(\"../extent.js\").Extent} [extent] Tile extent of the tile being read. This is only used and\n * required for {@link module:ol/format/MVT}.\n * @property {import(\"../proj.js\").ProjectionLike} [featureProjection] Projection of the feature geometries\n * created by the format reader. If not provided, features will be returned in the\n * `dataProjection`.\n */\n\n\n/**\n * @typedef {Object} WriteOptions\n * @property {import(\"../proj.js\").ProjectionLike} [dataProjection] Projection of the data we are writing.\n * If not provided, the `dataProjection` of the format is assigned (where set).\n * If no `dataProjection` is set for a format, the features will be returned\n * in the `featureProjection`.\n * @property {import(\"../proj.js\").ProjectionLike} [featureProjection] Projection of the feature geometries\n * that will be serialized by the format writer. If not provided, geometries are assumed\n * to be in the `dataProjection` if that is set; in other words, they are not transformed.\n * @property {boolean} [rightHanded] When writing geometries, follow the right-hand\n * rule for linear ring orientation.  This means that polygons will have counter-clockwise\n * exterior rings and clockwise interior rings.  By default, coordinates are serialized\n * as they are provided at construction.  If `true`, the right-hand rule will\n * be applied.  If `false`, the left-hand rule will be applied (clockwise for\n * exterior and counter-clockwise for interior rings).  Note that not all\n * formats support this.  The GeoJSON format does use this property when writing\n * geometries.\n * @property {number} [decimals] Maximum number of decimal places for coordinates.\n * Coordinates are stored internally as floats, but floating-point arithmetic can create\n * coordinates with a large number of decimal places, not generally wanted on output.\n * Set a number here to round coordinates. Can also be used to ensure that\n * coordinates read in can be written back out with the same number of decimals.\n * Default is no rounding.\n */\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for feature formats.\n * {FeatureFormat} subclasses provide the ability to decode and encode\n * {@link module:ol/Feature~Feature} objects from a variety of commonly used geospatial\n * file formats.  See the documentation for each format for more details.\n *\n * @abstract\n * @api\n */\nvar FeatureFormat = function FeatureFormat() {\n\n  /**\n   * @protected\n   * @type {import(\"../proj/Projection.js\").default}\n   */\n  this.dataProjection = null;\n\n  /**\n   * @protected\n   * @type {import(\"../proj/Projection.js\").default}\n   */\n  this.defaultFeatureProjection = null;\n\n};\n\n/**\n * Adds the data projection to the read options.\n * @param {Document|Node|Object|string} source Source.\n * @param {ReadOptions=} opt_options Options.\n * @return {ReadOptions|undefined} Options.\n * @protected\n */\nFeatureFormat.prototype.getReadOptions = function getReadOptions (source, opt_options) {\n  var options;\n  if (opt_options) {\n    options = {\n      dataProjection: opt_options.dataProjection ?\n        opt_options.dataProjection : this.readProjection(source),\n      featureProjection: opt_options.featureProjection\n    };\n  }\n  return this.adaptOptions(options);\n};\n\n/**\n * Sets the `dataProjection` on the options, if no `dataProjection`\n * is set.\n * @param {WriteOptions|ReadOptions|undefined} options\n *   Options.\n * @protected\n * @return {WriteOptions|ReadOptions|undefined}\n *   Updated options.\n */\nFeatureFormat.prototype.adaptOptions = function adaptOptions (options) {\n  return assign({\n    dataProjection: this.dataProjection,\n    featureProjection: this.defaultFeatureProjection\n  }, options);\n};\n\n/**\n * Get the extent from the source of the last {@link readFeatures} call.\n * @return {import(\"../extent.js\").Extent} Tile extent.\n */\nFeatureFormat.prototype.getLastExtent = function getLastExtent () {\n  return null;\n};\n\n/**\n * @abstract\n * @return {import(\"./FormatType.js\").default} Format.\n */\nFeatureFormat.prototype.getType = function getType () {\n  return abstract();\n};\n\n/**\n * Read a single feature from a source.\n *\n * @abstract\n * @param {Document|Node|Object|string} source Source.\n * @param {ReadOptions=} opt_options Read options.\n * @return {import(\"../Feature.js\").FeatureLike} Feature.\n */\nFeatureFormat.prototype.readFeature = function readFeature (source, opt_options) {\n  return abstract();\n};\n\n/**\n * Read all features from a source.\n *\n * @abstract\n * @param {Document|Node|ArrayBuffer|Object|string} source Source.\n * @param {ReadOptions=} opt_options Read options.\n * @return {Array<import(\"../Feature.js\").FeatureLike>} Features.\n */\nFeatureFormat.prototype.readFeatures = function readFeatures (source, opt_options) {\n  return abstract();\n};\n\n/**\n * Read a single geometry from a source.\n *\n * @abstract\n * @param {Document|Node|Object|string} source Source.\n * @param {ReadOptions=} opt_options Read options.\n * @return {import(\"../geom/Geometry.js\").default} Geometry.\n */\nFeatureFormat.prototype.readGeometry = function readGeometry (source, opt_options) {\n  return abstract();\n};\n\n/**\n * Read the projection from a source.\n *\n * @abstract\n * @param {Document|Node|Object|string} source Source.\n * @return {import(\"../proj/Projection.js\").default} Projection.\n */\nFeatureFormat.prototype.readProjection = function readProjection (source) {\n  return abstract();\n};\n\n/**\n * Encode a feature in this format.\n *\n * @abstract\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {WriteOptions=} opt_options Write options.\n * @return {string} Result.\n */\nFeatureFormat.prototype.writeFeature = function writeFeature (feature, opt_options) {\n  return abstract();\n};\n\n/**\n * Encode an array of features in this format.\n *\n * @abstract\n * @param {Array<import(\"../Feature.js\").default>} features Features.\n * @param {WriteOptions=} opt_options Write options.\n * @return {string} Result.\n */\nFeatureFormat.prototype.writeFeatures = function writeFeatures (features, opt_options) {\n  return abstract();\n};\n\n/**\n * Write a single geometry in this format.\n *\n * @abstract\n * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n * @param {WriteOptions=} opt_options Write options.\n * @return {string} Result.\n */\nFeatureFormat.prototype.writeGeometry = function writeGeometry (geometry, opt_options) {\n  return abstract();\n};\n\nexport default FeatureFormat;\n\n/**\n * @param {import(\"../geom/Geometry.js\").default|import(\"../extent.js\").Extent} geometry Geometry.\n * @param {boolean} write Set to true for writing, false for reading.\n * @param {(WriteOptions|ReadOptions)=} opt_options Options.\n * @return {import(\"../geom/Geometry.js\").default|import(\"../extent.js\").Extent} Transformed geometry.\n */\nexport function transformWithOptions(geometry, write, opt_options) {\n  var featureProjection = opt_options ?\n    getProjection(opt_options.featureProjection) : null;\n  var dataProjection = opt_options ?\n    getProjection(opt_options.dataProjection) : null;\n  /**\n   * @type {import(\"../geom/Geometry.js\").default|import(\"../extent.js\").Extent}\n   */\n  var transformed;\n  if (featureProjection && dataProjection &&\n      !equivalentProjection(featureProjection, dataProjection)) {\n    if (Array.isArray(geometry)) {\n      // FIXME this is necessary because GML treats extents\n      // as geometries\n      transformed = transformExtent(\n        geometry,\n        dataProjection,\n        featureProjection);\n    } else {\n      transformed = (write ? /** @type {import(\"../geom/Geometry\").default} */ (geometry).clone() : geometry).transform(\n        write ? featureProjection : dataProjection,\n        write ? dataProjection : featureProjection);\n    }\n  } else {\n    transformed = geometry;\n  }\n  if (write && opt_options && /** @type {WriteOptions} */ (opt_options).decimals !== undefined &&\n    !Array.isArray(transformed)) {\n    var power = Math.pow(10, /** @type {WriteOptions} */ (opt_options).decimals);\n    // if decimals option on write, round each coordinate appropriately\n    /**\n     * @param {Array<number>} coordinates Coordinates.\n     * @return {Array<number>} Transformed coordinates.\n     */\n    var transform = function(coordinates) {\n      for (var i = 0, ii = coordinates.length; i < ii; ++i) {\n        coordinates[i] = Math.round(coordinates[i] * power) / power;\n      }\n      return coordinates;\n    };\n    if (transformed === geometry) {\n      transformed = /** @type {import(\"../geom/Geometry\").default} */ (geometry).clone();\n    }\n    transformed.applyTransform(transform);\n  }\n  return transformed;\n}\n\n//# sourceMappingURL=Feature.js.map","/**\n * @module ol/xml\n */\nimport {extend} from './array.js';\n\n\n/**\n * When using {@link module:ol/xml~makeChildAppender} or\n * {@link module:ol/xml~makeSimpleNodeFactory}, the top `objectStack` item needs\n * to have this structure.\n * @typedef {Object} NodeStackItem\n * @property {Node} node\n */\n\n\n/**\n * @typedef {function(Element, Array<*>)} Parser\n */\n\n\n/**\n * @typedef {function(Element, *, Array<*>)} Serializer\n */\n\n\n/**\n * This document should be used when creating nodes for XML serializations. This\n * document is also used by {@link module:ol/xml~createElementNS}\n * @const\n * @type {Document}\n */\nexport var DOCUMENT = document.implementation.createDocument('', '', null);\n\n\n/**\n * @type {string}\n */\nexport var XML_SCHEMA_INSTANCE_URI = 'http://www.w3.org/2001/XMLSchema-instance';\n\n\n/**\n * @param {string} namespaceURI Namespace URI.\n * @param {string} qualifiedName Qualified name.\n * @return {Element} Node.\n */\nexport function createElementNS(namespaceURI, qualifiedName) {\n  return DOCUMENT.createElementNS(namespaceURI, qualifiedName);\n}\n\n\n/**\n * Recursively grab all text content of child nodes into a single string.\n * @param {Node} node Node.\n * @param {boolean} normalizeWhitespace Normalize whitespace: remove all line\n * breaks.\n * @return {string} All text content.\n * @api\n */\nexport function getAllTextContent(node, normalizeWhitespace) {\n  return getAllTextContent_(node, normalizeWhitespace, []).join('');\n}\n\n\n/**\n * Recursively grab all text content of child nodes into a single string.\n * @param {Node} node Node.\n * @param {boolean} normalizeWhitespace Normalize whitespace: remove all line\n * breaks.\n * @param {Array<string>} accumulator Accumulator.\n * @private\n * @return {Array<string>} Accumulator.\n */\nexport function getAllTextContent_(node, normalizeWhitespace, accumulator) {\n  if (node.nodeType == Node.CDATA_SECTION_NODE ||\n      node.nodeType == Node.TEXT_NODE) {\n    if (normalizeWhitespace) {\n      accumulator.push(String(node.nodeValue).replace(/(\\r\\n|\\r|\\n)/g, ''));\n    } else {\n      accumulator.push(node.nodeValue);\n    }\n  } else {\n    var n;\n    for (n = node.firstChild; n; n = n.nextSibling) {\n      getAllTextContent_(n, normalizeWhitespace, accumulator);\n    }\n  }\n  return accumulator;\n}\n\n\n/**\n * @param {Object} object Object.\n * @return {boolean} Is a document.\n */\nexport function isDocument(object) {\n  return 'documentElement' in object;\n}\n\n\n/**\n * @param {Element} node Node.\n * @param {?string} namespaceURI Namespace URI.\n * @param {string} name Attribute name.\n * @return {string} Value\n */\nexport function getAttributeNS(node, namespaceURI, name) {\n  return node.getAttributeNS(namespaceURI, name) || '';\n}\n\n\n/**\n * Parse an XML string to an XML Document.\n * @param {string} xml XML.\n * @return {Document} Document.\n * @api\n */\nexport function parse(xml) {\n  return new DOMParser().parseFromString(xml, 'application/xml');\n}\n\n\n/**\n * Make an array extender function for extending the array at the top of the\n * object stack.\n * @param {function(this: T, Node, Array<*>): (Array<*>|undefined)} valueReader Value reader.\n * @param {T=} opt_this The object to use as `this` in `valueReader`.\n * @return {Parser} Parser.\n * @template T\n */\nexport function makeArrayExtender(valueReader, opt_this) {\n  return (\n    /**\n     * @param {Node} node Node.\n     * @param {Array<*>} objectStack Object stack.\n     */\n    function(node, objectStack) {\n      var value = valueReader.call(opt_this !== undefined ? opt_this : this, node, objectStack);\n      if (value !== undefined) {\n        var array = /** @type {Array<*>} */ (objectStack[objectStack.length - 1]);\n        extend(array, value);\n      }\n    }\n  );\n}\n\n\n/**\n * Make an array pusher function for pushing to the array at the top of the\n * object stack.\n * @param {function(this: T, Element, Array<*>): *} valueReader Value reader.\n * @param {T=} opt_this The object to use as `this` in `valueReader`.\n * @return {Parser} Parser.\n * @template T\n */\nexport function makeArrayPusher(valueReader, opt_this) {\n  return (\n    /**\n     * @param {Element} node Node.\n     * @param {Array<*>} objectStack Object stack.\n     */\n    function(node, objectStack) {\n      var value = valueReader.call(opt_this !== undefined ? opt_this : this, node, objectStack);\n      if (value !== undefined) {\n        var array = /** @type {Array<*>} */ (objectStack[objectStack.length - 1]);\n        array.push(value);\n      }\n    });\n}\n\n\n/**\n * Make an object stack replacer function for replacing the object at the\n * top of the stack.\n * @param {function(this: T, Node, Array<*>): *} valueReader Value reader.\n * @param {T=} opt_this The object to use as `this` in `valueReader`.\n * @return {Parser} Parser.\n * @template T\n */\nexport function makeReplacer(valueReader, opt_this) {\n  return (\n    /**\n     * @param {Node} node Node.\n     * @param {Array<*>} objectStack Object stack.\n     */\n    function(node, objectStack) {\n      var value = valueReader.call(opt_this !== undefined ? opt_this : this, node, objectStack);\n      if (value !== undefined) {\n        objectStack[objectStack.length - 1] = value;\n      }\n    });\n}\n\n\n/**\n * Make an object property pusher function for adding a property to the\n * object at the top of the stack.\n * @param {function(this: T, Element, Array<*>): *} valueReader Value reader.\n * @param {string=} opt_property Property.\n * @param {T=} opt_this The object to use as `this` in `valueReader`.\n * @return {Parser} Parser.\n * @template T\n */\nexport function makeObjectPropertyPusher(valueReader, opt_property, opt_this) {\n  return (\n    /**\n     * @param {Element} node Node.\n     * @param {Array<*>} objectStack Object stack.\n     */\n    function(node, objectStack) {\n      var value = valueReader.call(opt_this !== undefined ? opt_this : this, node, objectStack);\n      if (value !== undefined) {\n        var object = /** @type {!Object} */ (objectStack[objectStack.length - 1]);\n        var property = opt_property !== undefined ? opt_property : node.localName;\n        var array;\n        if (property in object) {\n          array = object[property];\n        } else {\n          array = object[property] = [];\n        }\n        array.push(value);\n      }\n    });\n}\n\n\n/**\n * Make an object property setter function.\n * @param {function(this: T, Element, Array<*>): *} valueReader Value reader.\n * @param {string=} opt_property Property.\n * @param {T=} opt_this The object to use as `this` in `valueReader`.\n * @return {Parser} Parser.\n * @template T\n */\nexport function makeObjectPropertySetter(valueReader, opt_property, opt_this) {\n  return (\n    /**\n     * @param {Element} node Node.\n     * @param {Array<*>} objectStack Object stack.\n     */\n    function(node, objectStack) {\n      var value = valueReader.call(opt_this !== undefined ? opt_this : this, node, objectStack);\n      if (value !== undefined) {\n        var object = /** @type {!Object} */ (objectStack[objectStack.length - 1]);\n        var property = opt_property !== undefined ? opt_property : node.localName;\n        object[property] = value;\n      }\n    });\n}\n\n\n/**\n * Create a serializer that appends nodes written by its `nodeWriter` to its\n * designated parent. The parent is the `node` of the\n * {@link module:ol/xml~NodeStackItem} at the top of the `objectStack`.\n * @param {function(this: T, Node, V, Array<*>)} nodeWriter Node writer.\n * @param {T=} opt_this The object to use as `this` in `nodeWriter`.\n * @return {Serializer} Serializer.\n * @template T, V\n */\nexport function makeChildAppender(nodeWriter, opt_this) {\n  return function(node, value, objectStack) {\n    nodeWriter.call(opt_this !== undefined ? opt_this : this, node, value, objectStack);\n    var parent = /** @type {NodeStackItem} */ (objectStack[objectStack.length - 1]);\n    var parentNode = parent.node;\n    parentNode.appendChild(node);\n  };\n}\n\n\n/**\n * Create a serializer that calls the provided `nodeWriter` from\n * {@link module:ol/xml~serialize}. This can be used by the parent writer to have the\n * 'nodeWriter' called with an array of values when the `nodeWriter` was\n * designed to serialize a single item. An example would be a LineString\n * geometry writer, which could be reused for writing MultiLineString\n * geometries.\n * @param {function(this: T, Element, V, Array<*>)} nodeWriter Node writer.\n * @param {T=} opt_this The object to use as `this` in `nodeWriter`.\n * @return {Serializer} Serializer.\n * @template T, V\n */\nexport function makeArraySerializer(nodeWriter, opt_this) {\n  var serializersNS, nodeFactory;\n  return function(node, value, objectStack) {\n    if (serializersNS === undefined) {\n      serializersNS = {};\n      var serializers = {};\n      serializers[node.localName] = nodeWriter;\n      serializersNS[node.namespaceURI] = serializers;\n      nodeFactory = makeSimpleNodeFactory(node.localName);\n    }\n    serialize(serializersNS, nodeFactory, value, objectStack);\n  };\n}\n\n\n/**\n * Create a node factory which can use the `opt_keys` passed to\n * {@link module:ol/xml~serialize} or {@link module:ol/xml~pushSerializeAndPop} as node names,\n * or a fixed node name. The namespace of the created nodes can either be fixed,\n * or the parent namespace will be used.\n * @param {string=} opt_nodeName Fixed node name which will be used for all\n *     created nodes. If not provided, the 3rd argument to the resulting node\n *     factory needs to be provided and will be the nodeName.\n * @param {string=} opt_namespaceURI Fixed namespace URI which will be used for\n *     all created nodes. If not provided, the namespace of the parent node will\n *     be used.\n * @return {function(*, Array<*>, string=): (Node|undefined)} Node factory.\n */\nexport function makeSimpleNodeFactory(opt_nodeName, opt_namespaceURI) {\n  var fixedNodeName = opt_nodeName;\n  return (\n    /**\n     * @param {*} value Value.\n     * @param {Array<*>} objectStack Object stack.\n     * @param {string=} opt_nodeName Node name.\n     * @return {Node} Node.\n     */\n    function(value, objectStack, opt_nodeName) {\n      var context = /** @type {NodeStackItem} */ (objectStack[objectStack.length - 1]);\n      var node = context.node;\n      var nodeName = fixedNodeName;\n      if (nodeName === undefined) {\n        nodeName = opt_nodeName;\n      }\n\n      var namespaceURI = opt_namespaceURI !== undefined ? opt_namespaceURI : node.namespaceURI;\n      return createElementNS(namespaceURI, /** @type {string} */ (nodeName));\n    }\n  );\n}\n\n\n/**\n * A node factory that creates a node using the parent's `namespaceURI` and the\n * `nodeName` passed by {@link module:ol/xml~serialize} or\n * {@link module:ol/xml~pushSerializeAndPop} to the node factory.\n * @const\n * @type {function(*, Array<*>, string=): (Node|undefined)}\n */\nexport var OBJECT_PROPERTY_NODE_FACTORY = makeSimpleNodeFactory();\n\n\n/**\n * Create an array of `values` to be used with {@link module:ol/xml~serialize} or\n * {@link module:ol/xml~pushSerializeAndPop}, where `orderedKeys` has to be provided as\n * `opt_key` argument.\n * @param {Object<string, V>} object Key-value pairs for the sequence. Keys can\n *     be a subset of the `orderedKeys`.\n * @param {Array<string>} orderedKeys Keys in the order of the sequence.\n * @return {Array<V>} Values in the order of the sequence. The resulting array\n *     has the same length as the `orderedKeys` array. Values that are not\n *     present in `object` will be `undefined` in the resulting array.\n * @template V\n */\nexport function makeSequence(object, orderedKeys) {\n  var length = orderedKeys.length;\n  var sequence = new Array(length);\n  for (var i = 0; i < length; ++i) {\n    sequence[i] = object[orderedKeys[i]];\n  }\n  return sequence;\n}\n\n\n/**\n * Create a namespaced structure, using the same values for each namespace.\n * This can be used as a starting point for versioned parsers, when only a few\n * values are version specific.\n * @param {Array<string>} namespaceURIs Namespace URIs.\n * @param {T} structure Structure.\n * @param {Object<string, T>=} opt_structureNS Namespaced structure to add to.\n * @return {Object<string, T>} Namespaced structure.\n * @template T\n */\nexport function makeStructureNS(namespaceURIs, structure, opt_structureNS) {\n  /**\n   * @type {Object<string, T>}\n   */\n  var structureNS = opt_structureNS !== undefined ? opt_structureNS : {};\n  var i, ii;\n  for (i = 0, ii = namespaceURIs.length; i < ii; ++i) {\n    structureNS[namespaceURIs[i]] = structure;\n  }\n  return structureNS;\n}\n\n\n/**\n * Parse a node using the parsers and object stack.\n * @param {Object<string, Object<string, Parser>>} parsersNS\n *     Parsers by namespace.\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @param {*=} opt_this The object to use as `this`.\n */\nexport function parseNode(parsersNS, node, objectStack, opt_this) {\n  var n;\n  for (n = node.firstElementChild; n; n = n.nextElementSibling) {\n    var parsers = parsersNS[n.namespaceURI];\n    if (parsers !== undefined) {\n      var parser = parsers[n.localName];\n      if (parser !== undefined) {\n        parser.call(opt_this, n, objectStack);\n      }\n    }\n  }\n}\n\n\n/**\n * Push an object on top of the stack, parse and return the popped object.\n * @param {T} object Object.\n * @param {Object<string, Object<string, Parser>>} parsersNS\n *     Parsers by namespace.\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @param {*=} opt_this The object to use as `this`.\n * @return {T} Object.\n * @template T\n */\nexport function pushParseAndPop(object, parsersNS, node, objectStack, opt_this) {\n  objectStack.push(object);\n  parseNode(parsersNS, node, objectStack, opt_this);\n  return /** @type {T} */ (objectStack.pop());\n}\n\n\n/**\n * Walk through an array of `values` and call a serializer for each value.\n * @param {Object<string, Object<string, Serializer>>} serializersNS\n *     Namespaced serializers.\n * @param {function(this: T, *, Array<*>, (string|undefined)): (Node|undefined)} nodeFactory\n *     Node factory. The `nodeFactory` creates the node whose namespace and name\n *     will be used to choose a node writer from `serializersNS`. This\n *     separation allows us to decide what kind of node to create, depending on\n *     the value we want to serialize. An example for this would be different\n *     geometry writers based on the geometry type.\n * @param {Array<*>} values Values to serialize. An example would be an array\n *     of {@link module:ol/Feature~Feature} instances.\n * @param {Array<*>} objectStack Node stack.\n * @param {Array<string>=} opt_keys Keys of the `values`. Will be passed to the\n *     `nodeFactory`. This is used for serializing object literals where the\n *     node name relates to the property key. The array length of `opt_keys` has\n *     to match the length of `values`. For serializing a sequence, `opt_keys`\n *     determines the order of the sequence.\n * @param {T=} opt_this The object to use as `this` for the node factory and\n *     serializers.\n * @template T\n */\nexport function serialize(\n  serializersNS, nodeFactory, values, objectStack, opt_keys, opt_this) {\n  var length = (opt_keys !== undefined ? opt_keys : values).length;\n  var value, node;\n  for (var i = 0; i < length; ++i) {\n    value = values[i];\n    if (value !== undefined) {\n      node = nodeFactory.call(opt_this !== undefined ? opt_this : this, value, objectStack,\n        opt_keys !== undefined ? opt_keys[i] : undefined);\n      if (node !== undefined) {\n        serializersNS[node.namespaceURI][node.localName]\n          .call(opt_this, node, value, objectStack);\n      }\n    }\n  }\n}\n\n\n/**\n * @param {O} object Object.\n * @param {Object<string, Object<string, Serializer>>} serializersNS\n *     Namespaced serializers.\n * @param {function(this: T, *, Array<*>, (string|undefined)): (Node|undefined)} nodeFactory\n *     Node factory. The `nodeFactory` creates the node whose namespace and name\n *     will be used to choose a node writer from `serializersNS`. This\n *     separation allows us to decide what kind of node to create, depending on\n *     the value we want to serialize. An example for this would be different\n *     geometry writers based on the geometry type.\n * @param {Array<*>} values Values to serialize. An example would be an array\n *     of {@link module:ol/Feature~Feature} instances.\n * @param {Array<*>} objectStack Node stack.\n * @param {Array<string>=} opt_keys Keys of the `values`. Will be passed to the\n *     `nodeFactory`. This is used for serializing object literals where the\n *     node name relates to the property key. The array length of `opt_keys` has\n *     to match the length of `values`. For serializing a sequence, `opt_keys`\n *     determines the order of the sequence.\n * @param {T=} opt_this The object to use as `this` for the node factory and\n *     serializers.\n * @return {O|undefined} Object.\n * @template O, T\n */\nexport function pushSerializeAndPop(object, serializersNS, nodeFactory, values, objectStack, opt_keys, opt_this) {\n  objectStack.push(object);\n  serialize(serializersNS, nodeFactory, values, objectStack, opt_keys, opt_this);\n  return /** @type {O|undefined} */ (objectStack.pop());\n}\n\n//# sourceMappingURL=xml.js.map","/**\n * @module ol/format/XMLFeature\n */\nimport {abstract} from '../util.js';\nimport {extend} from '../array.js';\nimport FeatureFormat from '../format/Feature.js';\nimport FormatType from '../format/FormatType.js';\nimport {isDocument, parse} from '../xml.js';\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for XML feature formats.\n *\n * @abstract\n */\nvar XMLFeature = /*@__PURE__*/(function (FeatureFormat) {\n  function XMLFeature() {\n    FeatureFormat.call(this);\n\n    /**\n     * @type {XMLSerializer}\n     * @private\n     */\n    this.xmlSerializer_ = new XMLSerializer();\n  }\n\n  if ( FeatureFormat ) XMLFeature.__proto__ = FeatureFormat;\n  XMLFeature.prototype = Object.create( FeatureFormat && FeatureFormat.prototype );\n  XMLFeature.prototype.constructor = XMLFeature;\n\n  /**\n   * @inheritDoc\n   */\n  XMLFeature.prototype.getType = function getType () {\n    return FormatType.XML;\n  };\n\n  /**\n   * Read a single feature.\n   *\n   * @param {Document|Node|Object|string} source Source.\n   * @param {import(\"./Feature.js\").ReadOptions=} opt_options Read options.\n   * @return {import(\"../Feature.js\").default} Feature.\n   * @api\n   */\n  XMLFeature.prototype.readFeature = function readFeature (source, opt_options) {\n    if (!source) {\n      return null;\n    } else if (typeof source === 'string') {\n      var doc = parse(source);\n      return this.readFeatureFromDocument(doc, opt_options);\n    } else if (isDocument(source)) {\n      return this.readFeatureFromDocument(/** @type {Document} */ (source), opt_options);\n    } else {\n      return this.readFeatureFromNode(/** @type {Node} */ (source), opt_options);\n    }\n  };\n\n  /**\n   * @param {Document} doc Document.\n   * @param {import(\"./Feature.js\").ReadOptions=} opt_options Options.\n   * @return {import(\"../Feature.js\").default} Feature.\n   */\n  XMLFeature.prototype.readFeatureFromDocument = function readFeatureFromDocument (doc, opt_options) {\n    var features = this.readFeaturesFromDocument(doc, opt_options);\n    if (features.length > 0) {\n      return features[0];\n    } else {\n      return null;\n    }\n  };\n\n  /**\n   * @param {Node} node Node.\n   * @param {import(\"./Feature.js\").ReadOptions=} opt_options Options.\n   * @return {import(\"../Feature.js\").default} Feature.\n   */\n  XMLFeature.prototype.readFeatureFromNode = function readFeatureFromNode (node, opt_options) {\n    return null; // not implemented\n  };\n\n  /**\n   * Read all features from a feature collection.\n   *\n   * @param {Document|Node|Object|string} source Source.\n   * @param {import(\"./Feature.js\").ReadOptions=} opt_options Options.\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   * @api\n   */\n  XMLFeature.prototype.readFeatures = function readFeatures (source, opt_options) {\n    if (!source) {\n      return [];\n    } else if (typeof source === 'string') {\n      var doc = parse(source);\n      return this.readFeaturesFromDocument(doc, opt_options);\n    } else if (isDocument(source)) {\n      return this.readFeaturesFromDocument(\n        /** @type {Document} */ (source), opt_options);\n    } else {\n      return this.readFeaturesFromNode(/** @type {Node} */ (source), opt_options);\n    }\n  };\n\n  /**\n   * @param {Document} doc Document.\n   * @param {import(\"./Feature.js\").ReadOptions=} opt_options Options.\n   * @protected\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   */\n  XMLFeature.prototype.readFeaturesFromDocument = function readFeaturesFromDocument (doc, opt_options) {\n    /** @type {Array<import(\"../Feature.js\").default>} */\n    var features = [];\n    for (var n = /** @type {Node} */ (doc.firstChild); n; n = n.nextSibling) {\n      if (n.nodeType == Node.ELEMENT_NODE) {\n        extend(features, this.readFeaturesFromNode(n, opt_options));\n      }\n    }\n    return features;\n  };\n\n  /**\n   * @abstract\n   * @param {Node} node Node.\n   * @param {import(\"./Feature.js\").ReadOptions=} opt_options Options.\n   * @protected\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   */\n  XMLFeature.prototype.readFeaturesFromNode = function readFeaturesFromNode (node, opt_options) {\n    return abstract();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  XMLFeature.prototype.readGeometry = function readGeometry (source, opt_options) {\n    if (!source) {\n      return null;\n    } else if (typeof source === 'string') {\n      var doc = parse(source);\n      return this.readGeometryFromDocument(doc, opt_options);\n    } else if (isDocument(source)) {\n      return this.readGeometryFromDocument(\n        /** @type {Document} */ (source), opt_options);\n    } else {\n      return this.readGeometryFromNode(/** @type {Node} */ (source), opt_options);\n    }\n  };\n\n  /**\n   * @param {Document} doc Document.\n   * @param {import(\"./Feature.js\").ReadOptions=} opt_options Options.\n   * @protected\n   * @return {import(\"../geom/Geometry.js\").default} Geometry.\n   */\n  XMLFeature.prototype.readGeometryFromDocument = function readGeometryFromDocument (doc, opt_options) {\n    return null; // not implemented\n  };\n\n  /**\n   * @param {Node} node Node.\n   * @param {import(\"./Feature.js\").ReadOptions=} opt_options Options.\n   * @protected\n   * @return {import(\"../geom/Geometry.js\").default} Geometry.\n   */\n  XMLFeature.prototype.readGeometryFromNode = function readGeometryFromNode (node, opt_options) {\n    return null; // not implemented\n  };\n\n  /**\n   * Read the projection from the source.\n   *\n   * @param {Document|Node|Object|string} source Source.\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   * @api\n   */\n  XMLFeature.prototype.readProjection = function readProjection (source) {\n    if (!source) {\n      return null;\n    } else if (typeof source === 'string') {\n      var doc = parse(source);\n      return this.readProjectionFromDocument(doc);\n    } else if (isDocument(source)) {\n      return this.readProjectionFromDocument(/** @type {Document} */ (source));\n    } else {\n      return this.readProjectionFromNode(/** @type {Node} */ (source));\n    }\n  };\n\n  /**\n   * @param {Document} doc Document.\n   * @protected\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   */\n  XMLFeature.prototype.readProjectionFromDocument = function readProjectionFromDocument (doc) {\n    return this.dataProjection;\n  };\n\n  /**\n   * @param {Node} node Node.\n   * @protected\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   */\n  XMLFeature.prototype.readProjectionFromNode = function readProjectionFromNode (node) {\n    return this.dataProjection;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  XMLFeature.prototype.writeFeature = function writeFeature (feature, opt_options) {\n    var node = this.writeFeatureNode(feature, opt_options);\n    return this.xmlSerializer_.serializeToString(node);\n  };\n\n  /**\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @param {import(\"./Feature.js\").WriteOptions=} opt_options Options.\n   * @protected\n   * @return {Node} Node.\n   */\n  XMLFeature.prototype.writeFeatureNode = function writeFeatureNode (feature, opt_options) {\n    return null; // not implemented\n  };\n\n  /**\n   * Encode an array of features as string.\n   *\n   * @param {Array<import(\"../Feature.js\").default>} features Features.\n   * @param {import(\"./Feature.js\").WriteOptions=} opt_options Write options.\n   * @return {string} Result.\n   * @api\n   */\n  XMLFeature.prototype.writeFeatures = function writeFeatures (features, opt_options) {\n    var node = this.writeFeaturesNode(features, opt_options);\n    return this.xmlSerializer_.serializeToString(node);\n  };\n\n  /**\n   * @param {Array<import(\"../Feature.js\").default>} features Features.\n   * @param {import(\"./Feature.js\").WriteOptions=} opt_options Options.\n   * @return {Node} Node.\n   */\n  XMLFeature.prototype.writeFeaturesNode = function writeFeaturesNode (features, opt_options) {\n    return null; // not implemented\n  };\n\n  /**\n   * @inheritDoc\n   */\n  XMLFeature.prototype.writeGeometry = function writeGeometry (geometry, opt_options) {\n    var node = this.writeGeometryNode(geometry, opt_options);\n    return this.xmlSerializer_.serializeToString(node);\n  };\n\n  /**\n   * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n   * @param {import(\"./Feature.js\").WriteOptions=} opt_options Options.\n   * @return {Node} Node.\n   */\n  XMLFeature.prototype.writeGeometryNode = function writeGeometryNode (geometry, opt_options) {\n    return null; // not implemented\n  };\n\n  return XMLFeature;\n}(FeatureFormat));\n\n\nexport default XMLFeature;\n\n//# sourceMappingURL=XMLFeature.js.map","/**\n * @module ol/geom/flat/interpolate\n */\nimport {binarySearch} from '../../array.js';\nimport {lerp} from '../../math.js';\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} fraction Fraction.\n * @param {Array<number>=} opt_dest Destination.\n * @return {Array<number>} Destination.\n */\nexport function interpolatePoint(flatCoordinates, offset, end, stride, fraction, opt_dest) {\n  var pointX = NaN;\n  var pointY = NaN;\n  var n = (end - offset) / stride;\n  if (n === 1) {\n    pointX = flatCoordinates[offset];\n    pointY = flatCoordinates[offset + 1];\n  } else if (n == 2) {\n    pointX = (1 - fraction) * flatCoordinates[offset] +\n        fraction * flatCoordinates[offset + stride];\n    pointY = (1 - fraction) * flatCoordinates[offset + 1] +\n        fraction * flatCoordinates[offset + stride + 1];\n  } else if (n !== 0) {\n    var x1 = flatCoordinates[offset];\n    var y1 = flatCoordinates[offset + 1];\n    var length = 0;\n    var cumulativeLengths = [0];\n    for (var i = offset + stride; i < end; i += stride) {\n      var x2 = flatCoordinates[i];\n      var y2 = flatCoordinates[i + 1];\n      length += Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));\n      cumulativeLengths.push(length);\n      x1 = x2;\n      y1 = y2;\n    }\n    var target = fraction * length;\n    var index = binarySearch(cumulativeLengths, target);\n    if (index < 0) {\n      var t = (target - cumulativeLengths[-index - 2]) /\n          (cumulativeLengths[-index - 1] - cumulativeLengths[-index - 2]);\n      var o = offset + (-index - 2) * stride;\n      pointX = lerp(\n        flatCoordinates[o], flatCoordinates[o + stride], t);\n      pointY = lerp(\n        flatCoordinates[o + 1], flatCoordinates[o + stride + 1], t);\n    } else {\n      pointX = flatCoordinates[offset + index * stride];\n      pointY = flatCoordinates[offset + index * stride + 1];\n    }\n  }\n  if (opt_dest) {\n    opt_dest[0] = pointX;\n    opt_dest[1] = pointY;\n    return opt_dest;\n  } else {\n    return [pointX, pointY];\n  }\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} m M.\n * @param {boolean} extrapolate Extrapolate.\n * @return {import(\"../../coordinate.js\").Coordinate} Coordinate.\n */\nexport function lineStringCoordinateAtM(flatCoordinates, offset, end, stride, m, extrapolate) {\n  if (end == offset) {\n    return null;\n  }\n  var coordinate;\n  if (m < flatCoordinates[offset + stride - 1]) {\n    if (extrapolate) {\n      coordinate = flatCoordinates.slice(offset, offset + stride);\n      coordinate[stride - 1] = m;\n      return coordinate;\n    } else {\n      return null;\n    }\n  } else if (flatCoordinates[end - 1] < m) {\n    if (extrapolate) {\n      coordinate = flatCoordinates.slice(end - stride, end);\n      coordinate[stride - 1] = m;\n      return coordinate;\n    } else {\n      return null;\n    }\n  }\n  // FIXME use O(1) search\n  if (m == flatCoordinates[offset + stride - 1]) {\n    return flatCoordinates.slice(offset, offset + stride);\n  }\n  var lo = offset / stride;\n  var hi = end / stride;\n  while (lo < hi) {\n    var mid = (lo + hi) >> 1;\n    if (m < flatCoordinates[(mid + 1) * stride - 1]) {\n      hi = mid;\n    } else {\n      lo = mid + 1;\n    }\n  }\n  var m0 = flatCoordinates[lo * stride - 1];\n  if (m == m0) {\n    return flatCoordinates.slice((lo - 1) * stride, (lo - 1) * stride + stride);\n  }\n  var m1 = flatCoordinates[(lo + 1) * stride - 1];\n  var t = (m - m0) / (m1 - m0);\n  coordinate = [];\n  for (var i = 0; i < stride - 1; ++i) {\n    coordinate.push(lerp(flatCoordinates[(lo - 1) * stride + i],\n      flatCoordinates[lo * stride + i], t));\n  }\n  coordinate.push(m);\n  return coordinate;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} m M.\n * @param {boolean} extrapolate Extrapolate.\n * @param {boolean} interpolate Interpolate.\n * @return {import(\"../../coordinate.js\").Coordinate} Coordinate.\n */\nexport function lineStringsCoordinateAtM(\n  flatCoordinates, offset, ends, stride, m, extrapolate, interpolate) {\n  if (interpolate) {\n    return lineStringCoordinateAtM(\n      flatCoordinates, offset, ends[ends.length - 1], stride, m, extrapolate);\n  }\n  var coordinate;\n  if (m < flatCoordinates[stride - 1]) {\n    if (extrapolate) {\n      coordinate = flatCoordinates.slice(0, stride);\n      coordinate[stride - 1] = m;\n      return coordinate;\n    } else {\n      return null;\n    }\n  }\n  if (flatCoordinates[flatCoordinates.length - 1] < m) {\n    if (extrapolate) {\n      coordinate = flatCoordinates.slice(flatCoordinates.length - stride);\n      coordinate[stride - 1] = m;\n      return coordinate;\n    } else {\n      return null;\n    }\n  }\n  for (var i = 0, ii = ends.length; i < ii; ++i) {\n    var end = ends[i];\n    if (offset == end) {\n      continue;\n    }\n    if (m < flatCoordinates[offset + stride - 1]) {\n      return null;\n    } else if (m <= flatCoordinates[end - 1]) {\n      return lineStringCoordinateAtM(\n        flatCoordinates, offset, end, stride, m, false);\n    }\n    offset = end;\n  }\n  return null;\n}\n\n//# sourceMappingURL=interpolate.js.map","/**\n * @module ol/geom/LineString\n */\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport GeometryLayout from './GeometryLayout.js';\nimport GeometryType from './GeometryType.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {assignClosestPoint, maxSquaredDelta} from './flat/closest.js';\nimport {deflateCoordinates} from './flat/deflate.js';\nimport {inflateCoordinates} from './flat/inflate.js';\nimport {interpolatePoint, lineStringCoordinateAtM} from './flat/interpolate.js';\nimport {intersectsLineString} from './flat/intersectsextent.js';\nimport {lineStringLength} from './flat/length.js';\nimport {forEach as forEachSegment} from './flat/segments.js';\nimport {douglasPeucker} from './flat/simplify.js';\n\n/**\n * @classdesc\n * Linestring geometry.\n *\n * @api\n */\nvar LineString = /*@__PURE__*/(function (SimpleGeometry) {\n  function LineString(coordinates, opt_layout) {\n\n    SimpleGeometry.call(this);\n\n    /**\n     * @private\n     * @type {import(\"../coordinate.js\").Coordinate}\n     */\n    this.flatMidpoint_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.flatMidpointRevision_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDelta_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDeltaRevision_ = -1;\n\n    if (opt_layout !== undefined && !Array.isArray(coordinates[0])) {\n      this.setFlatCoordinates(opt_layout, /** @type {Array<number>} */ (coordinates));\n    } else {\n      this.setCoordinates(/** @type {Array<import(\"../coordinate.js\").Coordinate>} */ (coordinates), opt_layout);\n    }\n\n  }\n\n  if ( SimpleGeometry ) LineString.__proto__ = SimpleGeometry;\n  LineString.prototype = Object.create( SimpleGeometry && SimpleGeometry.prototype );\n  LineString.prototype.constructor = LineString;\n\n  /**\n   * Append the passed coordinate to the coordinates of the linestring.\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @api\n   */\n  LineString.prototype.appendCoordinate = function appendCoordinate (coordinate) {\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = coordinate.slice();\n    } else {\n      extend(this.flatCoordinates, coordinate);\n    }\n    this.changed();\n  };\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!LineString} Clone.\n   * @override\n   * @api\n   */\n  LineString.prototype.clone = function clone () {\n    return new LineString(this.flatCoordinates.slice(), this.layout);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  LineString.prototype.closestPointXY = function closestPointXY (x, y, closestPoint, minSquaredDistance) {\n    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n      return minSquaredDistance;\n    }\n    if (this.maxDeltaRevision_ != this.getRevision()) {\n      this.maxDelta_ = Math.sqrt(maxSquaredDelta(\n        this.flatCoordinates, 0, this.flatCoordinates.length, this.stride, 0));\n      this.maxDeltaRevision_ = this.getRevision();\n    }\n    return assignClosestPoint(\n      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,\n      this.maxDelta_, false, x, y, closestPoint, minSquaredDistance);\n  };\n\n  /**\n   * Iterate over each segment, calling the provided callback.\n   * If the callback returns a truthy value the function returns that\n   * value immediately. Otherwise the function returns `false`.\n   *\n   * @param {function(this: S, import(\"../coordinate.js\").Coordinate, import(\"../coordinate.js\").Coordinate): T} callback Function\n   *     called for each segment.\n   * @return {T|boolean} Value.\n   * @template T,S\n   * @api\n   */\n  LineString.prototype.forEachSegment = function forEachSegment$1 (callback) {\n    return forEachSegment(this.flatCoordinates, 0, this.flatCoordinates.length, this.stride, callback);\n  };\n\n  /**\n   * Returns the coordinate at `m` using linear interpolation, or `null` if no\n   * such coordinate exists.\n   *\n   * `opt_extrapolate` controls extrapolation beyond the range of Ms in the\n   * MultiLineString. If `opt_extrapolate` is `true` then Ms less than the first\n   * M will return the first coordinate and Ms greater than the last M will\n   * return the last coordinate.\n   *\n   * @param {number} m M.\n   * @param {boolean=} opt_extrapolate Extrapolate. Default is `false`.\n   * @return {import(\"../coordinate.js\").Coordinate} Coordinate.\n   * @api\n   */\n  LineString.prototype.getCoordinateAtM = function getCoordinateAtM (m, opt_extrapolate) {\n    if (this.layout != GeometryLayout.XYM &&\n        this.layout != GeometryLayout.XYZM) {\n      return null;\n    }\n    var extrapolate = opt_extrapolate !== undefined ? opt_extrapolate : false;\n    return lineStringCoordinateAtM(this.flatCoordinates, 0,\n      this.flatCoordinates.length, this.stride, m, extrapolate);\n  };\n\n  /**\n   * Return the coordinates of the linestring.\n   * @return {Array<import(\"../coordinate.js\").Coordinate>} Coordinates.\n   * @override\n   * @api\n   */\n  LineString.prototype.getCoordinates = function getCoordinates () {\n    return inflateCoordinates(\n      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);\n  };\n\n  /**\n   * Return the coordinate at the provided fraction along the linestring.\n   * The `fraction` is a number between 0 and 1, where 0 is the start of the\n   * linestring and 1 is the end.\n   * @param {number} fraction Fraction.\n   * @param {import(\"../coordinate.js\").Coordinate=} opt_dest Optional coordinate whose values will\n   *     be modified. If not provided, a new coordinate will be returned.\n   * @return {import(\"../coordinate.js\").Coordinate} Coordinate of the interpolated point.\n   * @api\n   */\n  LineString.prototype.getCoordinateAt = function getCoordinateAt (fraction, opt_dest) {\n    return interpolatePoint(\n      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,\n      fraction, opt_dest);\n  };\n\n  /**\n   * Return the length of the linestring on projected plane.\n   * @return {number} Length (on projected plane).\n   * @api\n   */\n  LineString.prototype.getLength = function getLength () {\n    return lineStringLength(\n      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);\n  };\n\n  /**\n   * @return {Array<number>} Flat midpoint.\n   */\n  LineString.prototype.getFlatMidpoint = function getFlatMidpoint () {\n    if (this.flatMidpointRevision_ != this.getRevision()) {\n      this.flatMidpoint_ = this.getCoordinateAt(0.5, this.flatMidpoint_);\n      this.flatMidpointRevision_ = this.getRevision();\n    }\n    return this.flatMidpoint_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  LineString.prototype.getSimplifiedGeometryInternal = function getSimplifiedGeometryInternal (squaredTolerance) {\n    var simplifiedFlatCoordinates = [];\n    simplifiedFlatCoordinates.length = douglasPeucker(\n      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,\n      squaredTolerance, simplifiedFlatCoordinates, 0);\n    return new LineString(simplifiedFlatCoordinates, GeometryLayout.XY);\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  LineString.prototype.getType = function getType () {\n    return GeometryType.LINE_STRING;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  LineString.prototype.intersectsExtent = function intersectsExtent (extent) {\n    return intersectsLineString(\n      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,\n      extent);\n  };\n\n  /**\n   * Set the coordinates of the linestring.\n   * @param {!Array<import(\"../coordinate.js\").Coordinate>} coordinates Coordinates.\n   * @param {GeometryLayout=} opt_layout Layout.\n   * @override\n   * @api\n   */\n  LineString.prototype.setCoordinates = function setCoordinates (coordinates, opt_layout) {\n    this.setLayout(opt_layout, coordinates, 1);\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = [];\n    }\n    this.flatCoordinates.length = deflateCoordinates(\n      this.flatCoordinates, 0, coordinates, this.stride);\n    this.changed();\n  };\n\n  return LineString;\n}(SimpleGeometry));\n\n\nexport default LineString;\n\n//# sourceMappingURL=LineString.js.map","/**\n * @module ol/format/OSMXML\n */\n// FIXME add typedef for stack state objects\nimport {extend} from '../array.js';\nimport Feature from '../Feature.js';\nimport {transformWithOptions} from './Feature.js';\nimport XMLFeature from './XMLFeature.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport LineString from '../geom/LineString.js';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport {isEmpty} from '../obj.js';\nimport {get as getProjection} from '../proj.js';\nimport {pushParseAndPop, makeStructureNS} from '../xml.js';\n\n\n/**\n * @const\n * @type {Array<null>}\n */\nvar NAMESPACE_URIS = [null];\n\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nvar WAY_PARSERS = makeStructureNS(\n  NAMESPACE_URIS, {\n    'nd': readNd,\n    'tag': readTag\n  });\n\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nvar PARSERS = makeStructureNS(\n  NAMESPACE_URIS, {\n    'node': readNode,\n    'way': readWay\n  });\n\n\n/**\n * @classdesc\n * Feature format for reading data in the\n * [OSMXML format](http://wiki.openstreetmap.org/wiki/OSM_XML).\n *\n * @api\n */\nvar OSMXML = /*@__PURE__*/(function (XMLFeature) {\n  function OSMXML() {\n    XMLFeature.call(this);\n\n    /**\n     * @inheritDoc\n     */\n    this.dataProjection = getProjection('EPSG:4326');\n  }\n\n  if ( XMLFeature ) OSMXML.__proto__ = XMLFeature;\n  OSMXML.prototype = Object.create( XMLFeature && XMLFeature.prototype );\n  OSMXML.prototype.constructor = OSMXML;\n\n  /**\n   * @inheritDoc\n   */\n  OSMXML.prototype.readFeaturesFromNode = function readFeaturesFromNode (node, opt_options) {\n    var options = this.getReadOptions(node, opt_options);\n    if (node.localName == 'osm') {\n      var state = pushParseAndPop({\n        nodes: {},\n        ways: [],\n        features: []\n      }, PARSERS, node, [options]);\n      // parse nodes in ways\n      for (var j = 0; j < state.ways.length; j++) {\n        var values = /** @type {Object} */ (state.ways[j]);\n        /** @type {Array<number>} */\n        var flatCoordinates = [];\n        for (var i = 0, ii = values.ndrefs.length; i < ii; i++) {\n          var point = state.nodes[values.ndrefs[i]];\n          extend(flatCoordinates, point);\n        }\n        var geometry = (void 0);\n        if (values.ndrefs[0] == values.ndrefs[values.ndrefs.length - 1]) {\n          // closed way\n          geometry = new Polygon(flatCoordinates, GeometryLayout.XY, [flatCoordinates.length]);\n        } else {\n          geometry = new LineString(flatCoordinates, GeometryLayout.XY);\n        }\n        transformWithOptions(geometry, false, options);\n        var feature = new Feature(geometry);\n        feature.setId(values.id);\n        feature.setProperties(values.tags);\n        state.features.push(feature);\n      }\n      if (state.features) {\n        return state.features;\n      }\n    }\n    return [];\n  };\n\n  return OSMXML;\n}(XMLFeature));\n\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nvar NODE_PARSERS = makeStructureNS(\n  NAMESPACE_URIS, {\n    'tag': readTag\n  });\n\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction readNode(node, objectStack) {\n  var options = /** @type {import(\"./Feature.js\").ReadOptions} */ (objectStack[0]);\n  var state = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  var id = node.getAttribute('id');\n  /** @type {import(\"../coordinate.js\").Coordinate} */\n  var coordinates = [\n    parseFloat(node.getAttribute('lon')),\n    parseFloat(node.getAttribute('lat'))\n  ];\n  state.nodes[id] = coordinates;\n\n  var values = pushParseAndPop({\n    tags: {}\n  }, NODE_PARSERS, node, objectStack);\n  if (!isEmpty(values.tags)) {\n    var geometry = new Point(coordinates);\n    transformWithOptions(geometry, false, options);\n    var feature = new Feature(geometry);\n    feature.setId(id);\n    feature.setProperties(values.tags);\n    state.features.push(feature);\n  }\n}\n\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction readWay(node, objectStack) {\n  var id = node.getAttribute('id');\n  var values = pushParseAndPop({\n    id: id,\n    ndrefs: [],\n    tags: {}\n  }, WAY_PARSERS, node, objectStack);\n  var state = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  state.ways.push(values);\n}\n\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction readNd(node, objectStack) {\n  var values = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  values.ndrefs.push(node.getAttribute('ref'));\n}\n\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction readTag(node, objectStack) {\n  var values = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  values.tags[node.getAttribute('k')] = node.getAttribute('v');\n}\n\n\nexport default OSMXML;\n\n//# sourceMappingURL=OSMXML.js.map","/**\n * @module ol/style/Text\n */\nimport Fill from './Fill.js';\nimport TextPlacement from './TextPlacement.js';\n\n\n/**\n * The default fill color to use if no fill was set at construction time; a\n * blackish `#333`.\n *\n * @const {string}\n */\nvar DEFAULT_FILL_COLOR = '#333';\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [font] Font style as CSS 'font' value, see:\n * https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/font. Default is '10px sans-serif'\n * @property {number} [maxAngle] When `placement` is set to `'line'`, allow a maximum angle between adjacent characters.\n * The expected value is in radians, and the default is 45° (`Math.PI / 4`).\n * @property {number} [offsetX=0] Horizontal text offset in pixels. A positive will shift the text right.\n * @property {number} [offsetY=0] Vertical text offset in pixels. A positive will shift the text down.\n * @property {boolean} [overflow=false] For polygon labels or when `placement` is set to `'line'`, allow text to exceed\n * the width of the polygon at the label position or the length of the path that it follows.\n * @property {import(\"./TextPlacement.js\").default|string} [placement] Text placement.\n * @property {number} [scale] Scale.\n * @property {boolean} [rotateWithView=false] Whether to rotate the text with the view.\n * @property {number} [rotation=0] Rotation in radians (positive rotation clockwise).\n * @property {string} [text] Text content.\n * @property {string} [textAlign] Text alignment. Possible values: 'left', 'right', 'center', 'end' or 'start'.\n * Default is 'center' for `placement: 'point'`. For `placement: 'line'`, the default is to let the renderer choose a\n * placement where `maxAngle` is not exceeded.\n * @property {string} [textBaseline='middle'] Text base line. Possible values: 'bottom', 'top', 'middle', 'alphabetic',\n * 'hanging', 'ideographic'.\n * @property {import(\"./Fill.js\").default} [fill] Fill style. If none is provided, we'll use a dark fill-style (#333).\n * @property {import(\"./Stroke.js\").default} [stroke] Stroke style.\n * @property {import(\"./Fill.js\").default} [backgroundFill] Fill style for the text background when `placement` is\n * `'point'`. Default is no fill.\n * @property {import(\"./Stroke.js\").default} [backgroundStroke] Stroke style for the text background  when `placement`\n * is `'point'`. Default is no stroke.\n * @property {Array<number>} [padding=[0, 0, 0, 0]] Padding in pixels around the text for decluttering and background. The order of\n * values in the array is `[top, right, bottom, left]`.\n */\n\n\n/**\n * @classdesc\n * Set text style for vector features.\n * @api\n */\nvar Text = function Text(opt_options) {\n\n  var options = opt_options || {};\n\n  /**\n  * @private\n  * @type {string|undefined}\n  */\n  this.font_ = options.font;\n\n  /**\n  * @private\n  * @type {number|undefined}\n  */\n  this.rotation_ = options.rotation;\n\n  /**\n  * @private\n  * @type {boolean|undefined}\n  */\n  this.rotateWithView_ = options.rotateWithView;\n\n  /**\n  * @private\n  * @type {number|undefined}\n  */\n  this.scale_ = options.scale;\n\n  /**\n  * @private\n  * @type {string|undefined}\n  */\n  this.text_ = options.text;\n\n  /**\n  * @private\n  * @type {string|undefined}\n  */\n  this.textAlign_ = options.textAlign;\n\n  /**\n  * @private\n  * @type {string|undefined}\n  */\n  this.textBaseline_ = options.textBaseline;\n\n  /**\n  * @private\n  * @type {import(\"./Fill.js\").default}\n  */\n  this.fill_ = options.fill !== undefined ? options.fill :\n    new Fill({color: DEFAULT_FILL_COLOR});\n\n  /**\n  * @private\n  * @type {number}\n  */\n  this.maxAngle_ = options.maxAngle !== undefined ? options.maxAngle : Math.PI / 4;\n\n  /**\n  * @private\n  * @type {import(\"./TextPlacement.js\").default|string}\n  */\n  this.placement_ = options.placement !== undefined ? options.placement : TextPlacement.POINT;\n\n  /**\n  * @private\n  * @type {boolean}\n  */\n  this.overflow_ = !!options.overflow;\n\n  /**\n  * @private\n  * @type {import(\"./Stroke.js\").default}\n  */\n  this.stroke_ = options.stroke !== undefined ? options.stroke : null;\n\n  /**\n  * @private\n  * @type {number}\n  */\n  this.offsetX_ = options.offsetX !== undefined ? options.offsetX : 0;\n\n  /**\n  * @private\n  * @type {number}\n  */\n  this.offsetY_ = options.offsetY !== undefined ? options.offsetY : 0;\n\n  /**\n  * @private\n  * @type {import(\"./Fill.js\").default}\n  */\n  this.backgroundFill_ = options.backgroundFill ? options.backgroundFill : null;\n\n  /**\n  * @private\n  * @type {import(\"./Stroke.js\").default}\n  */\n  this.backgroundStroke_ = options.backgroundStroke ? options.backgroundStroke : null;\n\n  /**\n  * @private\n  * @type {Array<number>}\n  */\n  this.padding_ = options.padding === undefined ? null : options.padding;\n};\n\n/**\n* Clones the style.\n* @return {Text} The cloned style.\n* @api\n*/\nText.prototype.clone = function clone () {\n  return new Text({\n    font: this.getFont(),\n    placement: this.getPlacement(),\n    maxAngle: this.getMaxAngle(),\n    overflow: this.getOverflow(),\n    rotation: this.getRotation(),\n    rotateWithView: this.getRotateWithView(),\n    scale: this.getScale(),\n    text: this.getText(),\n    textAlign: this.getTextAlign(),\n    textBaseline: this.getTextBaseline(),\n    fill: this.getFill() ? this.getFill().clone() : undefined,\n    stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n    offsetX: this.getOffsetX(),\n    offsetY: this.getOffsetY(),\n    backgroundFill: this.getBackgroundFill() ? this.getBackgroundFill().clone() : undefined,\n    backgroundStroke: this.getBackgroundStroke() ? this.getBackgroundStroke().clone() : undefined\n  });\n};\n\n/**\n* Get the `overflow` configuration.\n* @return {boolean} Let text overflow the length of the path they follow.\n* @api\n*/\nText.prototype.getOverflow = function getOverflow () {\n  return this.overflow_;\n};\n\n/**\n* Get the font name.\n* @return {string|undefined} Font.\n* @api\n*/\nText.prototype.getFont = function getFont () {\n  return this.font_;\n};\n\n/**\n* Get the maximum angle between adjacent characters.\n* @return {number} Angle in radians.\n* @api\n*/\nText.prototype.getMaxAngle = function getMaxAngle () {\n  return this.maxAngle_;\n};\n\n/**\n* Get the label placement.\n* @return {import(\"./TextPlacement.js\").default|string} Text placement.\n* @api\n*/\nText.prototype.getPlacement = function getPlacement () {\n  return this.placement_;\n};\n\n/**\n* Get the x-offset for the text.\n* @return {number} Horizontal text offset.\n* @api\n*/\nText.prototype.getOffsetX = function getOffsetX () {\n  return this.offsetX_;\n};\n\n/**\n* Get the y-offset for the text.\n* @return {number} Vertical text offset.\n* @api\n*/\nText.prototype.getOffsetY = function getOffsetY () {\n  return this.offsetY_;\n};\n\n/**\n* Get the fill style for the text.\n* @return {import(\"./Fill.js\").default} Fill style.\n* @api\n*/\nText.prototype.getFill = function getFill () {\n  return this.fill_;\n};\n\n/**\n* Determine whether the text rotates with the map.\n* @return {boolean|undefined} Rotate with map.\n* @api\n*/\nText.prototype.getRotateWithView = function getRotateWithView () {\n  return this.rotateWithView_;\n};\n\n/**\n* Get the text rotation.\n* @return {number|undefined} Rotation.\n* @api\n*/\nText.prototype.getRotation = function getRotation () {\n  return this.rotation_;\n};\n\n/**\n* Get the text scale.\n* @return {number|undefined} Scale.\n* @api\n*/\nText.prototype.getScale = function getScale () {\n  return this.scale_;\n};\n\n/**\n* Get the stroke style for the text.\n* @return {import(\"./Stroke.js\").default} Stroke style.\n* @api\n*/\nText.prototype.getStroke = function getStroke () {\n  return this.stroke_;\n};\n\n/**\n* Get the text to be rendered.\n* @return {string|undefined} Text.\n* @api\n*/\nText.prototype.getText = function getText () {\n  return this.text_;\n};\n\n/**\n* Get the text alignment.\n* @return {string|undefined} Text align.\n* @api\n*/\nText.prototype.getTextAlign = function getTextAlign () {\n  return this.textAlign_;\n};\n\n/**\n* Get the text baseline.\n* @return {string|undefined} Text baseline.\n* @api\n*/\nText.prototype.getTextBaseline = function getTextBaseline () {\n  return this.textBaseline_;\n};\n\n/**\n* Get the background fill style for the text.\n* @return {import(\"./Fill.js\").default} Fill style.\n* @api\n*/\nText.prototype.getBackgroundFill = function getBackgroundFill () {\n  return this.backgroundFill_;\n};\n\n/**\n* Get the background stroke style for the text.\n* @return {import(\"./Stroke.js\").default} Stroke style.\n* @api\n*/\nText.prototype.getBackgroundStroke = function getBackgroundStroke () {\n  return this.backgroundStroke_;\n};\n\n/**\n* Get the padding for the text.\n* @return {Array<number>} Padding.\n* @api\n*/\nText.prototype.getPadding = function getPadding () {\n  return this.padding_;\n};\n\n/**\n* Set the `overflow` property.\n*\n* @param {boolean} overflow Let text overflow the path that it follows.\n* @api\n*/\nText.prototype.setOverflow = function setOverflow (overflow) {\n  this.overflow_ = overflow;\n};\n\n/**\n* Set the font.\n*\n* @param {string|undefined} font Font.\n* @api\n*/\nText.prototype.setFont = function setFont (font) {\n  this.font_ = font;\n};\n\n/**\n* Set the maximum angle between adjacent characters.\n*\n* @param {number} maxAngle Angle in radians.\n* @api\n*/\nText.prototype.setMaxAngle = function setMaxAngle (maxAngle) {\n  this.maxAngle_ = maxAngle;\n};\n\n/**\n* Set the x offset.\n*\n* @param {number} offsetX Horizontal text offset.\n* @api\n*/\nText.prototype.setOffsetX = function setOffsetX (offsetX) {\n  this.offsetX_ = offsetX;\n};\n\n/**\n* Set the y offset.\n*\n* @param {number} offsetY Vertical text offset.\n* @api\n*/\nText.prototype.setOffsetY = function setOffsetY (offsetY) {\n  this.offsetY_ = offsetY;\n};\n\n/**\n* Set the text placement.\n*\n* @param {import(\"./TextPlacement.js\").default|string} placement Placement.\n* @api\n*/\nText.prototype.setPlacement = function setPlacement (placement) {\n  this.placement_ = placement;\n};\n\n/**\n* Set the fill.\n*\n* @param {import(\"./Fill.js\").default} fill Fill style.\n* @api\n*/\nText.prototype.setFill = function setFill (fill) {\n  this.fill_ = fill;\n};\n\n/**\n* Set the rotation.\n*\n* @param {number|undefined} rotation Rotation.\n* @api\n*/\nText.prototype.setRotation = function setRotation (rotation) {\n  this.rotation_ = rotation;\n};\n\n/**\n* Set the scale.\n*\n* @param {number|undefined} scale Scale.\n* @api\n*/\nText.prototype.setScale = function setScale (scale) {\n  this.scale_ = scale;\n};\n\n/**\n* Set the stroke.\n*\n* @param {import(\"./Stroke.js\").default} stroke Stroke style.\n* @api\n*/\nText.prototype.setStroke = function setStroke (stroke) {\n  this.stroke_ = stroke;\n};\n\n/**\n* Set the text.\n*\n* @param {string|undefined} text Text.\n* @api\n*/\nText.prototype.setText = function setText (text) {\n  this.text_ = text;\n};\n\n/**\n* Set the text alignment.\n*\n* @param {string|undefined} textAlign Text align.\n* @api\n*/\nText.prototype.setTextAlign = function setTextAlign (textAlign) {\n  this.textAlign_ = textAlign;\n};\n\n/**\n* Set the text baseline.\n*\n* @param {string|undefined} textBaseline Text baseline.\n* @api\n*/\nText.prototype.setTextBaseline = function setTextBaseline (textBaseline) {\n  this.textBaseline_ = textBaseline;\n};\n\n/**\n* Set the background fill.\n*\n* @param {import(\"./Fill.js\").default} fill Fill style.\n* @api\n*/\nText.prototype.setBackgroundFill = function setBackgroundFill (fill) {\n  this.backgroundFill_ = fill;\n};\n\n/**\n* Set the background stroke.\n*\n* @param {import(\"./Stroke.js\").default} stroke Stroke style.\n* @api\n*/\nText.prototype.setBackgroundStroke = function setBackgroundStroke (stroke) {\n  this.backgroundStroke_ = stroke;\n};\n\n/**\n* Set the padding (`[top, right, bottom, left]`).\n*\n* @param {!Array<number>} padding Padding.\n* @api\n*/\nText.prototype.setPadding = function setPadding (padding) {\n  this.padding_ = padding;\n};\n\nexport default Text;\n\n//# sourceMappingURL=Text.js.map","\"use strict\";\nimport Map from 'ol/Map.js';\nimport WebGLMap from 'ol/WebGLMap.js';\nimport {WEBGL} from 'ol/has.js'\nimport View from 'ol/View.js';\nimport {defaults as defaultControls, Attribution as AttributionControl} from 'ol/control.js';\nimport LayerSwitcher from 'ol-layerswitcher';\nimport {all as allStrategy} from 'ol/loadingstrategy';\nimport {bbox as bboxStrategy} from 'ol/loadingstrategy.js';\nimport LayerGroup from 'ol/layer/Group';\nimport LayerImage from 'ol/layer/Image';\nimport TileLayer from 'ol/layer/Tile';\nimport OSM from 'ol/source/OSM.js';\nimport XYZ from 'ol/source/XYZ';\nimport {fromLonLat, toLonLat} from 'ol/proj.js';\nimport VectorLayer from 'ol/layer/Vector.js';\nimport VectorSource from 'ol/source/Vector.js';\nimport VectorTileLayer from 'ol/layer/VectorTile.js';\nimport VectorTileSource from 'ol/source/VectorTile.js';\nimport OSMXML from 'ol/format/OSMXML.js';\nimport {Circle as CircleStyle, Fill, Stroke, Style, Text} from 'ol/style.js';\n\n\nconst coordinate_cccamp19 = fromLonLat([13.30735, 53.03127]);\n\nvar MapClass;\n\nif (WEBGL && false) {\n\tMapClass = WebGLMap;\n} else {\n\tMapClass = Map;\n}\n\nvar styles = {\n\t'amenity': {\n\t\t'parking': new Style({\n\t\t\tstroke: new Stroke({\n\t\t\t\tcolor: 'rgba(170, 170, 170, 1.0)',\n\t\t\t\twidth: 1\n\t\t\t}),\n\t\t\tfill: new Fill({\n\t\t\t\tcolor: 'rgba(170, 170, 170, 0.3)'\n\t\t\t})\n\t\t})\n\t},\n\t'building': {\n\t\t'.*': new Style({\n\t\t\tzIndex: 100,\n\t\t\tstroke: new Stroke({\n\t\t\t\tcolor: 'rgba(246, 99, 79, 1.0)',\n\t\t\t\twidth: 1\n\t\t\t}),\n\t\t\tfill: new Fill({\n\t\t\t\tcolor: 'rgba(246, 99, 79, 0.3)'\n\t\t\t}),\n\t\t\ttext: new Text({\n\t\t\t\tfont: '12px Calibri,sans-serif',\n\t\t\t\tfill: new Fill({\n\t\t\t\t\tcolor: '#000'\n\t\t\t\t}),\n\t\t\t\tstroke: new Stroke({\n\t\t\t\t\tcolor: '#fff',\n\t\t\t\t\twidth: 3\n\t\t\t\t})\n\t\t\t})\n\t\t})\n\t},\n\t'highway': {\n\t\t'service': new Style({\n\t\t\tstroke: new Stroke({\n\t\t\t\tcolor: 'rgba(255, 255, 255, 1.0)',\n\t\t\t\twidth: 2\n\t\t\t})\n\t\t}),\n\t\t'.*': new Style({\n\t\t\tstroke: new Stroke({\n\t\t\t\tcolor: 'rgba(255, 255, 255, 1.0)',\n\t\t\t\twidth: 3\n\t\t\t})\n\t\t})\n\t},\n\t'landuse': {\n\t\t'forest|grass|allotments': new Style({\n\t\t\tstroke: new Stroke({\n\t\t\t\tcolor: 'rgba(0, 0, 170, 1.0)',\n\t\t\t\twidth: 1\n\t\t\t}),\n\t\t\tfill: new Fill({\n\t\t\t\tcolor: 'rgba(0, 0, 170, 0.3)'\n\t\t\t}),\n\t\t\ttext: new Text({\n\t\t\t\tfont: '12px Calibri,sans-serif',\n\t\t\t\tfill: new Fill({\n\t\t\t\t\tcolor: '#000'\n\t\t\t\t}),\n\t\t\t\tstroke: new Stroke({\n\t\t\t\t\tcolor: '#fff',\n\t\t\t\t\twidth: 3\n\t\t\t\t})\n\t\t\t})\n\t\t})\n\t},\n\t'natural': {\n\t\t'tree': new Style({\n\t\t\timage: new CircleStyle({\n\t\t\t\tradius: 2,\n\t\t\t\tfill: new Fill({\n\t\t\t\t\t     color: 'rgba(140, 208, 95, 1.0)'\n\t\t\t\t\t   }),\n\t\t\t\tstroke: null\n\t\t\t})\n\t\t})\n\t},\n\t'name': {\n\t\t'.*': new Style({\n\t\t\ttext: new Text({\n\t\t\t\tfont: '12px Calibri,sans-serif',\n\t\t\t\tfill: new Fill({\n\t\t\t\t\tcolor: '#000'\n\t\t\t\t}),\n\t\t\t\tstroke: new Stroke({\n\t\t\t\t\tcolor: '#fff',\n\t\t\t\t\twidth: 3\n\t\t\t\t})\n\t\t\t})\n\t\t})\n\t}\n};\n\nvar vectorSource = new VectorSource({\n\tformat: new OSMXML(),\n\turl: 'https://seafile.milliways.info/f/688170149668429f9598/?dl=1',\n\tstrategy: allStrategy,\n\tattributions: '&#169;<a href=\"https://git.milliways.info/Milliways/cccamp19-map\">Milliways</a>',\n});\n\nvar orthoLayer = new TileLayer({\n\ttitle: 'Ortho Imagery',\n\ttype: 'base',\n\tsource: new XYZ({\n\t\turl: 'https://cdn.eventphone.de/maps/ziegeleipark/{z}/{x}/{y}.jpg',\n\t\tmaxZoom: 22,\n\t\tminZoom: 14,\n\t\tattributions: 'Bianco Veigel & Rene Hansen',\n\t\tattributionsCollapsible: false,\n\t})\n});\n\nvar vectorLayer =  new VectorLayer({\n      title: 'Milliways Overlay',\n      source: vectorSource,\n      style: function(feature) {\n        for (var key in styles) {\n          var value = feature.get(key);\n          if (value !== undefined) {\n            for (var regexp in styles[key]) {\n              if (new RegExp(regexp).test(value)) {\n                var style = styles[key][regexp];\n                var text = feature.get('name');\n                if(text !== undefined ) {\n                  if(feature.get('size') !== undefined) {\n                    text += '\\n' + feature.get('size');\n                  }\n                }\n                style.getText().setText(text);\n                return style;\n              }\n            }\n          }\n        }\n        return null;\n      }\n});\n\n\nvar osmLayer = new TileLayer({\n\ttitle: 'OSM',\n\ttype: 'base',\n\tsource: new OSM()\n});\n\nvar map = new MapClass({\n\ttarget: 'map',\n\tcontrols: defaultControls().extend([\n\t\tnew LayerSwitcher()\n\t]),\n\tnumZoomLevels: 19,\n\tunits: 'm',\n\tlayers: [\n\t\tnew LayerGroup({\n\t\t\ttitle: 'Base Layers',\n\t\t\tlayers: [\n\t\t\t\torthoLayer,\n\t\t\t\tosmLayer\n\t\t\t]\n\t\t}),\n\t\tnew LayerGroup({\n\t\t\ttitle: 'overlays',\n\t\t\tlayers: [\n\t\t\t\tvectorLayer\n\t\t\t]\n\t\t})\n\t],\n\tview: new View({\n\t\tcenter: coordinate_cccamp19,\n\t\tzoom: 17\n\t})\n});\n\n\nfunction parseURL(url) {\n\n\tvar parser = document.createElement('a'),\n\t\tsearchObject = {},\n\t\tqueries, split, i;\n\n\t// Let the browser do the work\n\tparser.href = url;\n\n\t// Convert query string to object\n\tqueries = parser.search.replace(/^\\?/, '').split('&');\n\tfor( i = 0; i < queries.length; i++ ) {\n\t\tsplit = queries[i].split('=');\n\t\tif(searchObject[split[0]]) {\n\t\t\tif(!Array.isArray(searchObject[split[0]])) {\n\t\t\t\tsearchObject[split[0]] = [searchObject[split[0]]];\n\t\t\t}\n\t\t\tsearchObject[split[0]].push(decodeURI(split[1]));\n\t\t} else {\n\t\t\tsearchObject[split[0]] = decodeURI(split[1]);\n\t\t}\n\t}\n\n\treturn {\n\t\tpathname: parser.pathname,\n\t\tsearch: parser.search,\n\t\tsearchObject: searchObject,\n\t\thash: parser.hash\n\t};\n\n}\n\n// start show coordinate in param and pars it [[[\nfunction generateHash(info) {\n\tvar params=[]\n\tfor( var param in info.searchObject) {\n\t\tif(param!='') {\n\t\t\tif(Array.isArray(info.searchObject[param])){\n\t\t\t\tinfo.searchObject[param].map(function(value) {\n\t\t\t\t\tparams.push(`${encodeURI(param)}=${encodeURI(value)}`);\n\t\t\t\t});\n\t\t\t} else {\n\t\t\t\tparams.push(`${encodeURI(param)}=${encodeURI(info.searchObject[param])}`);\n\t\t\t}\n\t\t}\n\t}\n\treturn `#${info.pathname}?${params.join('&')}`;\n}\n\nvar layers = [orthoLayer, osmLayer, vectorLayer];\nvar hash_info;\n\nvar coordinate_parser = /^(\\d+)\\/(-?\\d*\\.?\\d*)\\/(-?\\d*\\.?\\d*)/;\n\nfunction parseHash() {\n\thash_info=parseURL(location.hash.substr(1))\n\tif( hash_info.searchObject['map'] && coordinate_parser.test(hash_info.searchObject['map'])){\n\t\tvar map_info = coordinate_parser.exec(hash_info.searchObject['map']);\n\t\tmap.getView().setCenter(fromLonLat([Number(map_info[3]), Number(map_info[2])]));\n\t\tmap.getView().setZoom(map_info[1]);\n\t}\n\tif( hash_info.searchObject['layer']) {\n\t\tvar _layers = hash_info.searchObject['layer'];\n\t\tif(!Array.isArray(_layers)) {\n\t\t\t_layers = [_layers];\n\t\t}\n\t\tlayers.map(function(layer){\n\t\t\tlayer.setVisible(\n\t\t\t\t_layers.indexOf(layer.get('title')) >=0\n\t\t\t);\n\t\t});\n\t}\n}\n\nparseHash();\nwindow.onhashchange = function() {\n\tparseHash()\n};\n\nmap.on(\"moveend\", function(evt){\n\tvar map = evt.map;\n\tvar [lon, lat] = toLonLat(map.getView().getCenter());\n\tvar zoom = map.getView().getZoom();\n\thash_info.searchObject['map'] = `${zoom}/${lat}/${lon}`;\n\tlocation.hash = generateHash(hash_info);\n});\n\n// map types\nlayers.map(function(layer){\n\tlayer.addEventListener('change:visible',function(e){\n\t\thash_info=parseURL(location.hash.substr(1));\n\t\tvar _layers = [];\n\t\tlayers.map(function(layer) {\n\t\t\tif(layer.getVisible()){\n\t\t\t\t_layers.push(layer.get('title'));\n\t\t\t}\n\t\t});\n\t\thash_info.searchObject['layer'] = _layers;\n\t\tlocation.hash = generateHash(hash_info);\n\t});\n});\n\n// end coordinate parser ]]]\n\ndocument.Map = map;\n\n"],"sourceRoot":""}
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25);\n","/**\n * @module ol/util\n */\n\n/**\n * @return {?} Any return.\n */\nexport function abstract() {\n  return /** @type {?} */ ((function() {\n    throw new Error('Unimplemented abstract method.');\n  })());\n}\n\n/**\n * Inherit the prototype methods from one constructor into another.\n *\n * Usage:\n *\n *     function ParentClass(a, b) { }\n *     ParentClass.prototype.foo = function(a) { }\n *\n *     function ChildClass(a, b, c) {\n *       // Call parent constructor\n *       ParentClass.call(this, a, b);\n *     }\n *     inherits(ChildClass, ParentClass);\n *\n *     var child = new ChildClass('a', 'b', 'see');\n *     child.foo(); // This works.\n *\n * @param {!Function} childCtor Child constructor.\n * @param {!Function} parentCtor Parent constructor.\n * @function module:ol.inherits\n * @deprecated\n * @api\n */\nexport function inherits(childCtor, parentCtor) {\n  childCtor.prototype = Object.create(parentCtor.prototype);\n  childCtor.prototype.constructor = childCtor;\n}\n\n/**\n * Counter for getUid.\n * @type {number}\n * @private\n */\nvar uidCounter_ = 0;\n\n/**\n * Gets a unique ID for an object. This mutates the object so that further calls\n * with the same object as a parameter returns the same value. Unique IDs are generated\n * as a strictly increasing sequence. Adapted from goog.getUid.\n *\n * @param {Object} obj The object to get the unique ID for.\n * @return {string} The unique ID for the object.\n * @function module:ol.getUid\n * @api\n */\nexport function getUid(obj) {\n  return obj.ol_uid || (obj.ol_uid = String(++uidCounter_));\n}\n\n/**\n * OpenLayers version.\n * @type {string}\n */\nexport var VERSION = '5.3.3';\n\n//# sourceMappingURL=util.js.map","/**\n * @module ol/events\n */\nimport {clear} from './obj.js';\n\n\n/**\n * Key to use with {@link module:ol/Observable~Observable#unByKey}.\n * @typedef {Object} EventsKey\n * @property {Object} [bindTo]\n * @property {ListenerFunction} [boundListener]\n * @property {boolean} callOnce\n * @property {number} [deleteIndex]\n * @property {ListenerFunction} listener\n * @property {import(\"./events/Target.js\").EventTargetLike} target\n * @property {string} type\n * @api\n */\n\n\n/**\n * Listener function. This function is called with an event object as argument.\n * When the function returns `false`, event propagation will stop.\n *\n * @typedef {function((Event|import(\"./events/Event.js\").default)): (void|boolean)} ListenerFunction\n * @api\n */\n\n\n/**\n * @param {EventsKey} listenerObj Listener object.\n * @return {ListenerFunction} Bound listener.\n */\nexport function bindListener(listenerObj) {\n  var boundListener = function(evt) {\n    var listener = listenerObj.listener;\n    var bindTo = listenerObj.bindTo || listenerObj.target;\n    if (listenerObj.callOnce) {\n      unlistenByKey(listenerObj);\n    }\n    return listener.call(bindTo, evt);\n  };\n  listenerObj.boundListener = boundListener;\n  return boundListener;\n}\n\n\n/**\n * Finds the matching {@link module:ol/events~EventsKey} in the given listener\n * array.\n *\n * @param {!Array<!EventsKey>} listeners Array of listeners.\n * @param {!Function} listener The listener function.\n * @param {Object=} opt_this The `this` value inside the listener.\n * @param {boolean=} opt_setDeleteIndex Set the deleteIndex on the matching\n *     listener, for {@link module:ol/events~unlistenByKey}.\n * @return {EventsKey|undefined} The matching listener object.\n */\nexport function findListener(listeners, listener, opt_this, opt_setDeleteIndex) {\n  var listenerObj;\n  for (var i = 0, ii = listeners.length; i < ii; ++i) {\n    listenerObj = listeners[i];\n    if (listenerObj.listener === listener &&\n        listenerObj.bindTo === opt_this) {\n      if (opt_setDeleteIndex) {\n        listenerObj.deleteIndex = i;\n      }\n      return listenerObj;\n    }\n  }\n  return undefined;\n}\n\n\n/**\n * @param {import(\"./events/Target.js\").EventTargetLike} target Target.\n * @param {string} type Type.\n * @return {Array<EventsKey>|undefined} Listeners.\n */\nexport function getListeners(target, type) {\n  var listenerMap = getListenerMap(target);\n  return listenerMap ? listenerMap[type] : undefined;\n}\n\n\n/**\n * Get the lookup of listeners.\n * @param {Object} target Target.\n * @param {boolean=} opt_create If a map should be created if it doesn't exist.\n * @return {!Object<string, Array<EventsKey>>} Map of\n *     listeners by event type.\n */\nfunction getListenerMap(target, opt_create) {\n  var listenerMap = target.ol_lm;\n  if (!listenerMap && opt_create) {\n    listenerMap = target.ol_lm = {};\n  }\n  return listenerMap;\n}\n\n\n/**\n * Remove the listener map from a target.\n * @param {Object} target Target.\n */\nfunction removeListenerMap(target) {\n  delete target.ol_lm;\n}\n\n\n/**\n * Clean up all listener objects of the given type.  All properties on the\n * listener objects will be removed, and if no listeners remain in the listener\n * map, it will be removed from the target.\n * @param {import(\"./events/Target.js\").EventTargetLike} target Target.\n * @param {string} type Type.\n */\nfunction removeListeners(target, type) {\n  var listeners = getListeners(target, type);\n  if (listeners) {\n    for (var i = 0, ii = listeners.length; i < ii; ++i) {\n      /** @type {import(\"./events/Target.js\").default} */ (target).\n        removeEventListener(type, listeners[i].boundListener);\n      clear(listeners[i]);\n    }\n    listeners.length = 0;\n    var listenerMap = getListenerMap(target);\n    if (listenerMap) {\n      delete listenerMap[type];\n      if (Object.keys(listenerMap).length === 0) {\n        removeListenerMap(target);\n      }\n    }\n  }\n}\n\n\n/**\n * Registers an event listener on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * This function efficiently binds a `listener` to a `this` object, and returns\n * a key for use with {@link module:ol/events~unlistenByKey}.\n *\n * @param {import(\"./events/Target.js\").EventTargetLike} target Event target.\n * @param {string} type Event type.\n * @param {ListenerFunction} listener Listener.\n * @param {Object=} opt_this Object referenced by the `this` keyword in the\n *     listener. Default is the `target`.\n * @param {boolean=} opt_once If true, add the listener as one-off listener.\n * @return {EventsKey} Unique key for the listener.\n */\nexport function listen(target, type, listener, opt_this, opt_once) {\n  var listenerMap = getListenerMap(target, true);\n  var listeners = listenerMap[type];\n  if (!listeners) {\n    listeners = listenerMap[type] = [];\n  }\n  var listenerObj = findListener(listeners, listener, opt_this, false);\n  if (listenerObj) {\n    if (!opt_once) {\n      // Turn one-off listener into a permanent one.\n      listenerObj.callOnce = false;\n    }\n  } else {\n    listenerObj = /** @type {EventsKey} */ ({\n      bindTo: opt_this,\n      callOnce: !!opt_once,\n      listener: listener,\n      target: target,\n      type: type\n    });\n    /** @type {import(\"./events/Target.js\").default} */ (target).\n      addEventListener(type, bindListener(listenerObj));\n    listeners.push(listenerObj);\n  }\n\n  return listenerObj;\n}\n\n\n/**\n * Registers a one-off event listener on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * This function efficiently binds a `listener` as self-unregistering listener\n * to a `this` object, and returns a key for use with\n * {@link module:ol/events~unlistenByKey} in case the listener needs to be\n * unregistered before it is called.\n *\n * When {@link module:ol/events~listen} is called with the same arguments after this\n * function, the self-unregistering listener will be turned into a permanent\n * listener.\n *\n * @param {import(\"./events/Target.js\").EventTargetLike} target Event target.\n * @param {string} type Event type.\n * @param {ListenerFunction} listener Listener.\n * @param {Object=} opt_this Object referenced by the `this` keyword in the\n *     listener. Default is the `target`.\n * @return {EventsKey} Key for unlistenByKey.\n */\nexport function listenOnce(target, type, listener, opt_this) {\n  return listen(target, type, listener, opt_this, true);\n}\n\n\n/**\n * Unregisters an event listener on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * To return a listener, this function needs to be called with the exact same\n * arguments that were used for a previous {@link module:ol/events~listen} call.\n *\n * @param {import(\"./events/Target.js\").EventTargetLike} target Event target.\n * @param {string} type Event type.\n * @param {ListenerFunction} listener Listener.\n * @param {Object=} opt_this Object referenced by the `this` keyword in the\n *     listener. Default is the `target`.\n */\nexport function unlisten(target, type, listener, opt_this) {\n  var listeners = getListeners(target, type);\n  if (listeners) {\n    var listenerObj = findListener(listeners, listener, opt_this, true);\n    if (listenerObj) {\n      unlistenByKey(listenerObj);\n    }\n  }\n}\n\n\n/**\n * Unregisters event listeners on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * The argument passed to this function is the key returned from\n * {@link module:ol/events~listen} or {@link module:ol/events~listenOnce}.\n *\n * @param {EventsKey} key The key.\n */\nexport function unlistenByKey(key) {\n  if (key && key.target) {\n    /** @type {import(\"./events/Target.js\").default} */ (key.target).\n      removeEventListener(key.type, key.boundListener);\n    var listeners = getListeners(key.target, key.type);\n    if (listeners) {\n      var i = 'deleteIndex' in key ? key.deleteIndex : listeners.indexOf(key);\n      if (i !== -1) {\n        listeners.splice(i, 1);\n      }\n      if (listeners.length === 0) {\n        removeListeners(key.target, key.type);\n      }\n    }\n    clear(key);\n  }\n}\n\n\n/**\n * Unregisters all event listeners on an event target. Inspired by\n * https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html\n *\n * @param {import(\"./events/Target.js\").EventTargetLike} target Target.\n */\nexport function unlistenAll(target) {\n  var listenerMap = getListenerMap(target);\n  if (listenerMap) {\n    for (var type in listenerMap) {\n      removeListeners(target, type);\n    }\n  }\n}\n\n//# sourceMappingURL=events.js.map","/**\n * @module ol/events/EventType\n */\n\n/**\n * @enum {string}\n * @const\n */\nexport default {\n  /**\n   * Generic change event. Triggered when the revision counter is increased.\n   * @event module:ol/events/Event~Event#change\n   * @api\n   */\n  CHANGE: 'change',\n\n  CLEAR: 'clear',\n  CONTEXTMENU: 'contextmenu',\n  CLICK: 'click',\n  DBLCLICK: 'dblclick',\n  DRAGENTER: 'dragenter',\n  DRAGOVER: 'dragover',\n  DROP: 'drop',\n  ERROR: 'error',\n  KEYDOWN: 'keydown',\n  KEYPRESS: 'keypress',\n  LOAD: 'load',\n  MOUSEDOWN: 'mousedown',\n  MOUSEMOVE: 'mousemove',\n  MOUSEOUT: 'mouseout',\n  MOUSEUP: 'mouseup',\n  MOUSEWHEEL: 'mousewheel',\n  MSPOINTERDOWN: 'MSPointerDown',\n  RESIZE: 'resize',\n  TOUCHSTART: 'touchstart',\n  TOUCHMOVE: 'touchmove',\n  TOUCHEND: 'touchend',\n  WHEEL: 'wheel'\n};\n\n//# sourceMappingURL=EventType.js.map","/**\n * @module ol/obj\n */\n\n\n/**\n * Polyfill for Object.assign().  Assigns enumerable and own properties from\n * one or more source objects to a target object.\n * See https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Object/assign.\n *\n * @param {!Object} target The target object.\n * @param {...Object} var_sources The source object(s).\n * @return {!Object} The modified target object.\n */\nexport var assign = (typeof Object.assign === 'function') ? Object.assign : function(target, var_sources) {\n  var arguments$1 = arguments;\n\n  if (target === undefined || target === null) {\n    throw new TypeError('Cannot convert undefined or null to object');\n  }\n\n  var output = Object(target);\n  for (var i = 1, ii = arguments.length; i < ii; ++i) {\n    var source = arguments$1[i];\n    if (source !== undefined && source !== null) {\n      for (var key in source) {\n        if (source.hasOwnProperty(key)) {\n          output[key] = source[key];\n        }\n      }\n    }\n  }\n  return output;\n};\n\n\n/**\n * Removes all properties from an object.\n * @param {Object} object The object to clear.\n */\nexport function clear(object) {\n  for (var property in object) {\n    delete object[property];\n  }\n}\n\n\n/**\n * Get an array of property values from an object.\n * @param {Object<K,V>} object The object from which to get the values.\n * @return {!Array<V>} The property values.\n * @template K,V\n */\nexport function getValues(object) {\n  var values = [];\n  for (var property in object) {\n    values.push(object[property]);\n  }\n  return values;\n}\n\n\n/**\n * Determine if an object has any properties.\n * @param {Object} object The object to check.\n * @return {boolean} The object is empty.\n */\nexport function isEmpty(object) {\n  var property;\n  for (property in object) {\n    return false;\n  }\n  return !property;\n}\n\n//# sourceMappingURL=obj.js.map","/**\n * @module ol/dom\n */\n\n\n/**\n * Create an html canvas element and returns its 2d context.\n * @param {number=} opt_width Canvas width.\n * @param {number=} opt_height Canvas height.\n * @return {CanvasRenderingContext2D} The context.\n */\nexport function createCanvasContext2D(opt_width, opt_height) {\n  var canvas = /** @type {HTMLCanvasElement} */ (document.createElement('canvas'));\n  if (opt_width) {\n    canvas.width = opt_width;\n  }\n  if (opt_height) {\n    canvas.height = opt_height;\n  }\n  return /** @type {CanvasRenderingContext2D} */ (canvas.getContext('2d'));\n}\n\n\n/**\n * Get the current computed width for the given element including margin,\n * padding and border.\n * Equivalent to jQuery's `$(el).outerWidth(true)`.\n * @param {!HTMLElement} element Element.\n * @return {number} The width.\n */\nexport function outerWidth(element) {\n  var width = element.offsetWidth;\n  var style = getComputedStyle(element);\n  width += parseInt(style.marginLeft, 10) + parseInt(style.marginRight, 10);\n\n  return width;\n}\n\n\n/**\n * Get the current computed height for the given element including margin,\n * padding and border.\n * Equivalent to jQuery's `$(el).outerHeight(true)`.\n * @param {!HTMLElement} element Element.\n * @return {number} The height.\n */\nexport function outerHeight(element) {\n  var height = element.offsetHeight;\n  var style = getComputedStyle(element);\n  height += parseInt(style.marginTop, 10) + parseInt(style.marginBottom, 10);\n\n  return height;\n}\n\n/**\n * @param {Node} newNode Node to replace old node\n * @param {Node} oldNode The node to be replaced\n */\nexport function replaceNode(newNode, oldNode) {\n  var parent = oldNode.parentNode;\n  if (parent) {\n    parent.replaceChild(newNode, oldNode);\n  }\n}\n\n/**\n * @param {Node} node The node to remove.\n * @returns {Node} The node that was removed or null.\n */\nexport function removeNode(node) {\n  return node && node.parentNode ? node.parentNode.removeChild(node) : null;\n}\n\n/**\n * @param {Node} node The node to remove the children from.\n */\nexport function removeChildren(node) {\n  while (node.lastChild) {\n    node.removeChild(node.lastChild);\n  }\n}\n\n//# sourceMappingURL=dom.js.map","/**\n * @module ol/functions\n */\n\n/**\n * Always returns true.\n * @returns {boolean} true.\n */\nexport function TRUE() {\n  return true;\n}\n\n/**\n * Always returns false.\n * @returns {boolean} false.\n */\nexport function FALSE() {\n  return false;\n}\n\n/**\n * A reusable function, used e.g. as a default for callbacks.\n *\n * @return {void} Nothing.\n */\nexport function VOID() {}\n\n//# sourceMappingURL=functions.js.map","/**\n * @module ol/Object\n */\nimport {getUid} from './util.js';\nimport ObjectEventType from './ObjectEventType.js';\nimport Observable from './Observable.js';\nimport Event from './events/Event.js';\nimport {assign} from './obj.js';\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/Object~BaseObject} instances are instances of this type.\n */\nexport var ObjectEvent = /*@__PURE__*/(function (Event) {\n  function ObjectEvent(type, key, oldValue) {\n    Event.call(this, type);\n\n    /**\n     * The name of the property whose value is changing.\n     * @type {string}\n     * @api\n     */\n    this.key = key;\n\n    /**\n     * The old value. To get the new value use `e.target.get(e.key)` where\n     * `e` is the event object.\n     * @type {*}\n     * @api\n     */\n    this.oldValue = oldValue;\n\n  }\n\n  if ( Event ) ObjectEvent.__proto__ = Event;\n  ObjectEvent.prototype = Object.create( Event && Event.prototype );\n  ObjectEvent.prototype.constructor = ObjectEvent;\n\n  return ObjectEvent;\n}(Event));\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Most non-trivial classes inherit from this.\n *\n * This extends {@link module:ol/Observable} with observable\n * properties, where each property is observable as well as the object as a\n * whole.\n *\n * Classes that inherit from this have pre-defined properties, to which you can\n * add your owns. The pre-defined properties are listed in this documentation as\n * 'Observable Properties', and have their own accessors; for example,\n * {@link module:ol/Map~Map} has a `target` property, accessed with\n * `getTarget()` and changed with `setTarget()`. Not all properties are however\n * settable. There are also general-purpose accessors `get()` and `set()`. For\n * example, `get('target')` is equivalent to `getTarget()`.\n *\n * The `set` accessors trigger a change event, and you can monitor this by\n * registering a listener. For example, {@link module:ol/View~View} has a\n * `center` property, so `view.on('change:center', function(evt) {...});` would\n * call the function whenever the value of the center property changes. Within\n * the function, `evt.target` would be the view, so `evt.target.getCenter()`\n * would return the new center.\n *\n * You can add your own observable properties with\n * `object.set('prop', 'value')`, and retrieve that with `object.get('prop')`.\n * You can listen for changes on that property value with\n * `object.on('change:prop', listener)`. You can get a list of all\n * properties with {@link module:ol/Object~BaseObject#getProperties}.\n *\n * Note that the observable properties are separate from standard JS properties.\n * You can, for example, give your map object a title with\n * `map.title='New title'` and with `map.set('title', 'Another title')`. The\n * first will be a `hasOwnProperty`; the second will appear in\n * `getProperties()`. Only the second is observable.\n *\n * Properties can be deleted by using the unset method. E.g.\n * object.unset('foo').\n *\n * @fires ObjectEvent\n * @api\n */\nvar BaseObject = /*@__PURE__*/(function (Observable) {\n  function BaseObject(opt_values) {\n    Observable.call(this);\n\n    // Call {@link module:ol/util~getUid} to ensure that the order of objects' ids is\n    // the same as the order in which they were created.  This also helps to\n    // ensure that object properties are always added in the same order, which\n    // helps many JavaScript engines generate faster code.\n    getUid(this);\n\n    /**\n     * @private\n     * @type {!Object<string, *>}\n     */\n    this.values_ = {};\n\n    if (opt_values !== undefined) {\n      this.setProperties(opt_values);\n    }\n  }\n\n  if ( Observable ) BaseObject.__proto__ = Observable;\n  BaseObject.prototype = Object.create( Observable && Observable.prototype );\n  BaseObject.prototype.constructor = BaseObject;\n\n  /**\n   * Gets a value.\n   * @param {string} key Key name.\n   * @return {*} Value.\n   * @api\n   */\n  BaseObject.prototype.get = function get (key) {\n    var value;\n    if (this.values_.hasOwnProperty(key)) {\n      value = this.values_[key];\n    }\n    return value;\n  };\n\n  /**\n   * Get a list of object property names.\n   * @return {Array<string>} List of property names.\n   * @api\n   */\n  BaseObject.prototype.getKeys = function getKeys () {\n    return Object.keys(this.values_);\n  };\n\n  /**\n   * Get an object of all property names and values.\n   * @return {Object<string, *>} Object.\n   * @api\n   */\n  BaseObject.prototype.getProperties = function getProperties () {\n    return assign({}, this.values_);\n  };\n\n  /**\n   * @param {string} key Key name.\n   * @param {*} oldValue Old value.\n   */\n  BaseObject.prototype.notify = function notify (key, oldValue) {\n    var eventType;\n    eventType = getChangeEventType(key);\n    this.dispatchEvent(new ObjectEvent(eventType, key, oldValue));\n    eventType = ObjectEventType.PROPERTYCHANGE;\n    this.dispatchEvent(new ObjectEvent(eventType, key, oldValue));\n  };\n\n  /**\n   * Sets a value.\n   * @param {string} key Key name.\n   * @param {*} value Value.\n   * @param {boolean=} opt_silent Update without triggering an event.\n   * @api\n   */\n  BaseObject.prototype.set = function set (key, value, opt_silent) {\n    if (opt_silent) {\n      this.values_[key] = value;\n    } else {\n      var oldValue = this.values_[key];\n      this.values_[key] = value;\n      if (oldValue !== value) {\n        this.notify(key, oldValue);\n      }\n    }\n  };\n\n  /**\n   * Sets a collection of key-value pairs.  Note that this changes any existing\n   * properties and adds new ones (it does not remove any existing properties).\n   * @param {Object<string, *>} values Values.\n   * @param {boolean=} opt_silent Update without triggering an event.\n   * @api\n   */\n  BaseObject.prototype.setProperties = function setProperties (values, opt_silent) {\n    for (var key in values) {\n      this.set(key, values[key], opt_silent);\n    }\n  };\n\n  /**\n   * Unsets a property.\n   * @param {string} key Key name.\n   * @param {boolean=} opt_silent Unset without triggering an event.\n   * @api\n   */\n  BaseObject.prototype.unset = function unset (key, opt_silent) {\n    if (key in this.values_) {\n      var oldValue = this.values_[key];\n      delete this.values_[key];\n      if (!opt_silent) {\n        this.notify(key, oldValue);\n      }\n    }\n  };\n\n  return BaseObject;\n}(Observable));\n\n\n/**\n * @type {Object<string, string>}\n */\nvar changeEventTypeCache = {};\n\n\n/**\n * @param {string} key Key name.\n * @return {string} Change name.\n */\nexport function getChangeEventType(key) {\n  return changeEventTypeCache.hasOwnProperty(key) ?\n    changeEventTypeCache[key] :\n    (changeEventTypeCache[key] = 'change:' + key);\n}\n\n\nexport default BaseObject;\n\n//# sourceMappingURL=Object.js.map","/**\n * @module ol/events/Event\n */\n\n/**\n * @classdesc\n * Stripped down implementation of the W3C DOM Level 2 Event interface.\n * See https://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-interface.\n *\n * This implementation only provides `type` and `target` properties, and\n * `stopPropagation` and `preventDefault` methods. It is meant as base class\n * for higher level events defined in the library, and works with\n * {@link module:ol/events/Target~Target}.\n */\nvar Event = function Event(type) {\n\n  /**\n   * @type {boolean}\n   */\n  this.propagationStopped;\n\n  /**\n   * The event type.\n   * @type {string}\n   * @api\n   */\n  this.type = type;\n\n  /**\n   * The event target.\n   * @type {Object}\n   * @api\n   */\n  this.target = null;\n};\n\n/**\n * Stop event propagation.\n * @api\n */\nEvent.prototype.preventDefault = function preventDefault () {\n  this.propagationStopped = true;\n};\n\n/**\n * Stop event propagation.\n * @api\n */\nEvent.prototype.stopPropagation = function stopPropagation () {\n  this.propagationStopped = true;\n};\n\n\n/**\n * @param {Event|import(\"./Event.js\").default} evt Event\n */\nexport function stopPropagation(evt) {\n  evt.stopPropagation();\n}\n\n\n/**\n * @param {Event|import(\"./Event.js\").default} evt Event\n */\nexport function preventDefault(evt) {\n  evt.preventDefault();\n}\n\nexport default Event;\n\n//# sourceMappingURL=Event.js.map","/**\n * @module ol/events/Target\n */\nimport Disposable from '../Disposable.js';\nimport {unlistenAll} from '../events.js';\nimport {VOID} from '../functions.js';\nimport Event from './Event.js';\n\n\n/**\n * @typedef {EventTarget|Target} EventTargetLike\n */\n\n\n/**\n * @classdesc\n * A simplified implementation of the W3C DOM Level 2 EventTarget interface.\n * See https://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113/events.html#Events-EventTarget.\n *\n * There are two important simplifications compared to the specification:\n *\n * 1. The handling of `useCapture` in `addEventListener` and\n *    `removeEventListener`. There is no real capture model.\n * 2. The handling of `stopPropagation` and `preventDefault` on `dispatchEvent`.\n *    There is no event target hierarchy. When a listener calls\n *    `stopPropagation` or `preventDefault` on an event object, it means that no\n *    more listeners after this one will be called. Same as when the listener\n *    returns false.\n */\nvar Target = /*@__PURE__*/(function (Disposable) {\n  function Target() {\n\n    Disposable.call(this);\n\n    /**\n     * @private\n     * @type {!Object<string, number>}\n     */\n    this.pendingRemovals_ = {};\n\n    /**\n     * @private\n     * @type {!Object<string, number>}\n     */\n    this.dispatching_ = {};\n\n    /**\n     * @private\n     * @type {!Object<string, Array<import(\"../events.js\").ListenerFunction>>}\n     */\n    this.listeners_ = {};\n\n  }\n\n  if ( Disposable ) Target.__proto__ = Disposable;\n  Target.prototype = Object.create( Disposable && Disposable.prototype );\n  Target.prototype.constructor = Target;\n\n  /**\n   * @param {string} type Type.\n   * @param {import(\"../events.js\").ListenerFunction} listener Listener.\n   */\n  Target.prototype.addEventListener = function addEventListener (type, listener) {\n    var listeners = this.listeners_[type];\n    if (!listeners) {\n      listeners = this.listeners_[type] = [];\n    }\n    if (listeners.indexOf(listener) === -1) {\n      listeners.push(listener);\n    }\n  };\n\n  /**\n   * Dispatches an event and calls all listeners listening for events\n   * of this type. The event parameter can either be a string or an\n   * Object with a `type` property.\n   *\n   * @param {{type: string,\n   *     target: (EventTargetLike|undefined),\n   *     propagationStopped: (boolean|undefined)}|\n   *     import(\"./Event.js\").default|string} event Event object.\n   * @return {boolean|undefined} `false` if anyone called preventDefault on the\n   *     event object or if any of the listeners returned false.\n   * @api\n   */\n  Target.prototype.dispatchEvent = function dispatchEvent (event) {\n    var evt = typeof event === 'string' ? new Event(event) : event;\n    var type = evt.type;\n    evt.target = this;\n    var listeners = this.listeners_[type];\n    var propagate;\n    if (listeners) {\n      if (!(type in this.dispatching_)) {\n        this.dispatching_[type] = 0;\n        this.pendingRemovals_[type] = 0;\n      }\n      ++this.dispatching_[type];\n      for (var i = 0, ii = listeners.length; i < ii; ++i) {\n        if (listeners[i].call(this, evt) === false || evt.propagationStopped) {\n          propagate = false;\n          break;\n        }\n      }\n      --this.dispatching_[type];\n      if (this.dispatching_[type] === 0) {\n        var pendingRemovals = this.pendingRemovals_[type];\n        delete this.pendingRemovals_[type];\n        while (pendingRemovals--) {\n          this.removeEventListener(type, VOID);\n        }\n        delete this.dispatching_[type];\n      }\n      return propagate;\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  Target.prototype.disposeInternal = function disposeInternal () {\n    unlistenAll(this);\n  };\n\n  /**\n   * Get the listeners for a specified event type. Listeners are returned in the\n   * order that they will be called in.\n   *\n   * @param {string} type Type.\n   * @return {Array<import(\"../events.js\").ListenerFunction>} Listeners.\n   */\n  Target.prototype.getListeners = function getListeners (type) {\n    return this.listeners_[type];\n  };\n\n  /**\n   * @param {string=} opt_type Type. If not provided,\n   *     `true` will be returned if this event target has any listeners.\n   * @return {boolean} Has listeners.\n   */\n  Target.prototype.hasListener = function hasListener (opt_type) {\n    return opt_type ?\n      opt_type in this.listeners_ :\n      Object.keys(this.listeners_).length > 0;\n  };\n\n  /**\n   * @param {string} type Type.\n   * @param {import(\"../events.js\").ListenerFunction} listener Listener.\n   */\n  Target.prototype.removeEventListener = function removeEventListener (type, listener) {\n    var listeners = this.listeners_[type];\n    if (listeners) {\n      var index = listeners.indexOf(listener);\n      if (type in this.pendingRemovals_) {\n        // make listener a no-op, and remove later in #dispatchEvent()\n        listeners[index] = VOID;\n        ++this.pendingRemovals_[type];\n      } else {\n        listeners.splice(index, 1);\n        if (listeners.length === 0) {\n          delete this.listeners_[type];\n        }\n      }\n    }\n  };\n\n  return Target;\n}(Disposable));\n\n\nexport default Target;\n\n//# sourceMappingURL=Target.js.map","/**\n * @module ol/control/Control\n */\nimport {VOID} from '../functions.js';\nimport MapEventType from '../MapEventType.js';\nimport BaseObject from '../Object.js';\nimport {removeNode} from '../dom.js';\nimport {listen, unlistenByKey} from '../events.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {HTMLElement} [element] The element is the control's\n * container element. This only needs to be specified if you're developing\n * a custom control.\n * @property {function(import(\"../MapEvent.js\").default)} [render] Function called when\n * the control should be re-rendered. This is called in a `requestAnimationFrame`\n * callback.\n * @property {HTMLElement|string} [target] Specify a target if you want\n * the control to be rendered outside of the map's viewport.\n */\n\n\n/**\n * @classdesc\n * A control is a visible widget with a DOM element in a fixed position on the\n * screen. They can involve user input (buttons), or be informational only;\n * the position is determined using CSS. By default these are placed in the\n * container with CSS class name `ol-overlaycontainer-stopevent`, but can use\n * any outside DOM element.\n *\n * This is the base class for controls. You can use it for simple custom\n * controls by creating the element with listeners, creating an instance:\n * ```js\n * var myControl = new Control({element: myElement});\n * ```\n * and then adding this to the map.\n *\n * The main advantage of having this as a control rather than a simple separate\n * DOM element is that preventing propagation is handled for you. Controls\n * will also be objects in a {@link module:ol/Collection~Collection}, so you can use their methods.\n *\n * You can also extend this base for your own control class. See\n * examples/custom-controls for an example of how to do this.\n *\n * @api\n */\nvar Control = /*@__PURE__*/(function (BaseObject) {\n  function Control(options) {\n\n    BaseObject.call(this);\n\n    /**\n     * @protected\n     * @type {HTMLElement}\n     */\n    this.element = options.element ? options.element : null;\n\n    /**\n     * @private\n     * @type {HTMLElement}\n     */\n    this.target_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../PluggableMap.js\").default}\n     */\n    this.map_ = null;\n\n    /**\n     * @protected\n     * @type {!Array<import(\"../events.js\").EventsKey>}\n     */\n    this.listenerKeys = [];\n\n    /**\n     * @type {function(import(\"../MapEvent.js\").default)}\n     */\n    this.render = options.render ? options.render : VOID;\n\n    if (options.target) {\n      this.setTarget(options.target);\n    }\n\n  }\n\n  if ( BaseObject ) Control.__proto__ = BaseObject;\n  Control.prototype = Object.create( BaseObject && BaseObject.prototype );\n  Control.prototype.constructor = Control;\n\n  /**\n   * @inheritDoc\n   */\n  Control.prototype.disposeInternal = function disposeInternal () {\n    removeNode(this.element);\n    BaseObject.prototype.disposeInternal.call(this);\n  };\n\n  /**\n   * Get the map associated with this control.\n   * @return {import(\"../PluggableMap.js\").default} Map.\n   * @api\n   */\n  Control.prototype.getMap = function getMap () {\n    return this.map_;\n  };\n\n  /**\n   * Remove the control from its current map and attach it to the new map.\n   * Subclasses may set up event handlers to get notified about changes to\n   * the map here.\n   * @param {import(\"../PluggableMap.js\").default} map Map.\n   * @api\n   */\n  Control.prototype.setMap = function setMap (map) {\n    if (this.map_) {\n      removeNode(this.element);\n    }\n    for (var i = 0, ii = this.listenerKeys.length; i < ii; ++i) {\n      unlistenByKey(this.listenerKeys[i]);\n    }\n    this.listenerKeys.length = 0;\n    this.map_ = map;\n    if (this.map_) {\n      var target = this.target_ ?\n        this.target_ : map.getOverlayContainerStopEvent();\n      target.appendChild(this.element);\n      if (this.render !== VOID) {\n        this.listenerKeys.push(listen(map,\n          MapEventType.POSTRENDER, this.render, this));\n      }\n      map.render();\n    }\n  };\n\n  /**\n   * This function is used to set a target element for the control. It has no\n   * effect if it is called after the control has been added to the map (i.e.\n   * after `setMap` is called on the control). If no `target` is set in the\n   * options passed to the control constructor and if `setTarget` is not called\n   * then the control is added to the map's overlay container.\n   * @param {HTMLElement|string} target Target.\n   * @api\n   */\n  Control.prototype.setTarget = function setTarget (target) {\n    this.target_ = typeof target === 'string' ?\n      document.getElementById(target) :\n      target;\n  };\n\n  return Control;\n}(BaseObject));\n\n\nexport default Control;\n\n//# sourceMappingURL=Control.js.map","/**\n * @module ol/ObjectEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  /**\n   * Triggered when a property is changed.\n   * @event module:ol/Object.ObjectEvent#propertychange\n   * @api\n   */\n  PROPERTYCHANGE: 'propertychange'\n};\n\n//# sourceMappingURL=ObjectEventType.js.map","/**\n * @module ol/Disposable\n */\n\n/**\n * @classdesc\n * Objects that need to clean up after themselves.\n */\nvar Disposable = function Disposable() {\n  /**\n   * The object has already been disposed.\n   * @type {boolean}\n   * @private\n   */\n  this.disposed_ = false;\n};\n\n/**\n * Clean up.\n */\nDisposable.prototype.dispose = function dispose () {\n  if (!this.disposed_) {\n    this.disposed_ = true;\n    this.disposeInternal();\n  }\n};\n\n/**\n * Extension point for disposable objects.\n * @protected\n */\nDisposable.prototype.disposeInternal = function disposeInternal () {};\n\nexport default Disposable;\n\n//# sourceMappingURL=Disposable.js.map","/**\n * @module ol/MapEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n\n  /**\n   * Triggered after a map frame is rendered.\n   * @event module:ol/MapEvent~MapEvent#postrender\n   * @api\n   */\n  POSTRENDER: 'postrender',\n\n  /**\n   * Triggered when the map starts moving.\n   * @event module:ol/MapEvent~MapEvent#movestart\n   * @api\n   */\n  MOVESTART: 'movestart',\n\n  /**\n   * Triggered after the map is moved.\n   * @event module:ol/MapEvent~MapEvent#moveend\n   * @api\n   */\n  MOVEEND: 'moveend'\n\n};\n\n//# sourceMappingURL=MapEventType.js.map","/**\n * @module ol/Observable\n */\nimport {listen, unlistenByKey, unlisten, listenOnce} from './events.js';\nimport EventTarget from './events/Target.js';\nimport EventType from './events/EventType.js';\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * An event target providing convenient methods for listener registration\n * and unregistration. A generic `change` event is always available through\n * {@link module:ol/Observable~Observable#changed}.\n *\n * @fires import(\"./events/Event.js\").Event\n * @api\n */\nvar Observable = /*@__PURE__*/(function (EventTarget) {\n  function Observable() {\n\n    EventTarget.call(this);\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.revision_ = 0;\n\n  }\n\n  if ( EventTarget ) Observable.__proto__ = EventTarget;\n  Observable.prototype = Object.create( EventTarget && EventTarget.prototype );\n  Observable.prototype.constructor = Observable;\n\n  /**\n   * Increases the revision counter and dispatches a 'change' event.\n   * @api\n   */\n  Observable.prototype.changed = function changed () {\n    ++this.revision_;\n    this.dispatchEvent(EventType.CHANGE);\n  };\n\n  /**\n   * Get the version number for this object.  Each time the object is modified,\n   * its version number will be incremented.\n   * @return {number} Revision.\n   * @api\n   */\n  Observable.prototype.getRevision = function getRevision () {\n    return this.revision_;\n  };\n\n  /**\n   * Listen for a certain type of event.\n   * @param {string|Array<string>} type The event type or array of event types.\n   * @param {function(?): ?} listener The listener function.\n   * @return {import(\"./events.js\").EventsKey|Array<import(\"./events.js\").EventsKey>} Unique key for the listener. If\n   *     called with an array of event types as the first argument, the return\n   *     will be an array of keys.\n   * @api\n   */\n  Observable.prototype.on = function on (type, listener) {\n    if (Array.isArray(type)) {\n      var len = type.length;\n      var keys = new Array(len);\n      for (var i = 0; i < len; ++i) {\n        keys[i] = listen(this, type[i], listener);\n      }\n      return keys;\n    } else {\n      return listen(this, /** @type {string} */ (type), listener);\n    }\n  };\n\n  /**\n   * Listen once for a certain type of event.\n   * @param {string|Array<string>} type The event type or array of event types.\n   * @param {function(?): ?} listener The listener function.\n   * @return {import(\"./events.js\").EventsKey|Array<import(\"./events.js\").EventsKey>} Unique key for the listener. If\n   *     called with an array of event types as the first argument, the return\n   *     will be an array of keys.\n   * @api\n   */\n  Observable.prototype.once = function once (type, listener) {\n    if (Array.isArray(type)) {\n      var len = type.length;\n      var keys = new Array(len);\n      for (var i = 0; i < len; ++i) {\n        keys[i] = listenOnce(this, type[i], listener);\n      }\n      return keys;\n    } else {\n      return listenOnce(this, /** @type {string} */ (type), listener);\n    }\n  };\n\n  /**\n   * Unlisten for a certain type of event.\n   * @param {string|Array<string>} type The event type or array of event types.\n   * @param {function(?): ?} listener The listener function.\n   * @api\n   */\n  Observable.prototype.un = function un (type, listener) {\n    if (Array.isArray(type)) {\n      for (var i = 0, ii = type.length; i < ii; ++i) {\n        unlisten(this, type[i], listener);\n      }\n      return;\n    } else {\n      unlisten(this, /** @type {string} */ (type), listener);\n    }\n  };\n\n  return Observable;\n}(EventTarget));\n\n\n/**\n * Removes an event listener using the key returned by `on()` or `once()`.\n * @param {import(\"./events.js\").EventsKey|Array<import(\"./events.js\").EventsKey>} key The key returned by `on()`\n *     or `once()` (or an array of keys).\n * @api\n */\nexport function unByKey(key) {\n  if (Array.isArray(key)) {\n    for (var i = 0, ii = key.length; i < ii; ++i) {\n      unlistenByKey(key[i]);\n    }\n  } else {\n    unlistenByKey(/** @type {import(\"./events.js\").EventsKey} */ (key));\n  }\n}\n\n\nexport default Observable;\n\n//# sourceMappingURL=Observable.js.map","'use strict';\n\nmodule.exports = rbush;\nmodule.exports.default = rbush;\n\nvar quickselect = require('quickselect');\n\nfunction rbush(maxEntries, format) {\n    if (!(this instanceof rbush)) return new rbush(maxEntries, format);\n\n    // max entries in a node is 9 by default; min node fill is 40% for best performance\n    this._maxEntries = Math.max(4, maxEntries || 9);\n    this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));\n\n    if (format) {\n        this._initFormat(format);\n    }\n\n    this.clear();\n}\n\nrbush.prototype = {\n\n    all: function () {\n        return this._all(this.data, []);\n    },\n\n    search: function (bbox) {\n\n        var node = this.data,\n            result = [],\n            toBBox = this.toBBox;\n\n        if (!intersects(bbox, node)) return result;\n\n        var nodesToSearch = [],\n            i, len, child, childBBox;\n\n        while (node) {\n            for (i = 0, len = node.children.length; i < len; i++) {\n\n                child = node.children[i];\n                childBBox = node.leaf ? toBBox(child) : child;\n\n                if (intersects(bbox, childBBox)) {\n                    if (node.leaf) result.push(child);\n                    else if (contains(bbox, childBBox)) this._all(child, result);\n                    else nodesToSearch.push(child);\n                }\n            }\n            node = nodesToSearch.pop();\n        }\n\n        return result;\n    },\n\n    collides: function (bbox) {\n\n        var node = this.data,\n            toBBox = this.toBBox;\n\n        if (!intersects(bbox, node)) return false;\n\n        var nodesToSearch = [],\n            i, len, child, childBBox;\n\n        while (node) {\n            for (i = 0, len = node.children.length; i < len; i++) {\n\n                child = node.children[i];\n                childBBox = node.leaf ? toBBox(child) : child;\n\n                if (intersects(bbox, childBBox)) {\n                    if (node.leaf || contains(bbox, childBBox)) return true;\n                    nodesToSearch.push(child);\n                }\n            }\n            node = nodesToSearch.pop();\n        }\n\n        return false;\n    },\n\n    load: function (data) {\n        if (!(data && data.length)) return this;\n\n        if (data.length < this._minEntries) {\n            for (var i = 0, len = data.length; i < len; i++) {\n                this.insert(data[i]);\n            }\n            return this;\n        }\n\n        // recursively build the tree with the given data from scratch using OMT algorithm\n        var node = this._build(data.slice(), 0, data.length - 1, 0);\n\n        if (!this.data.children.length) {\n            // save as is if tree is empty\n            this.data = node;\n\n        } else if (this.data.height === node.height) {\n            // split root if trees have the same height\n            this._splitRoot(this.data, node);\n\n        } else {\n            if (this.data.height < node.height) {\n                // swap trees if inserted one is bigger\n                var tmpNode = this.data;\n                this.data = node;\n                node = tmpNode;\n            }\n\n            // insert the small tree into the large tree at appropriate level\n            this._insert(node, this.data.height - node.height - 1, true);\n        }\n\n        return this;\n    },\n\n    insert: function (item) {\n        if (item) this._insert(item, this.data.height - 1);\n        return this;\n    },\n\n    clear: function () {\n        this.data = createNode([]);\n        return this;\n    },\n\n    remove: function (item, equalsFn) {\n        if (!item) return this;\n\n        var node = this.data,\n            bbox = this.toBBox(item),\n            path = [],\n            indexes = [],\n            i, parent, index, goingUp;\n\n        // depth-first iterative tree traversal\n        while (node || path.length) {\n\n            if (!node) { // go up\n                node = path.pop();\n                parent = path[path.length - 1];\n                i = indexes.pop();\n                goingUp = true;\n            }\n\n            if (node.leaf) { // check current node\n                index = findItem(item, node.children, equalsFn);\n\n                if (index !== -1) {\n                    // item found, remove the item and condense tree upwards\n                    node.children.splice(index, 1);\n                    path.push(node);\n                    this._condense(path);\n                    return this;\n                }\n            }\n\n            if (!goingUp && !node.leaf && contains(node, bbox)) { // go down\n                path.push(node);\n                indexes.push(i);\n                i = 0;\n                parent = node;\n                node = node.children[0];\n\n            } else if (parent) { // go right\n                i++;\n                node = parent.children[i];\n                goingUp = false;\n\n            } else node = null; // nothing found\n        }\n\n        return this;\n    },\n\n    toBBox: function (item) { return item; },\n\n    compareMinX: compareNodeMinX,\n    compareMinY: compareNodeMinY,\n\n    toJSON: function () { return this.data; },\n\n    fromJSON: function (data) {\n        this.data = data;\n        return this;\n    },\n\n    _all: function (node, result) {\n        var nodesToSearch = [];\n        while (node) {\n            if (node.leaf) result.push.apply(result, node.children);\n            else nodesToSearch.push.apply(nodesToSearch, node.children);\n\n            node = nodesToSearch.pop();\n        }\n        return result;\n    },\n\n    _build: function (items, left, right, height) {\n\n        var N = right - left + 1,\n            M = this._maxEntries,\n            node;\n\n        if (N <= M) {\n            // reached leaf level; return leaf\n            node = createNode(items.slice(left, right + 1));\n            calcBBox(node, this.toBBox);\n            return node;\n        }\n\n        if (!height) {\n            // target height of the bulk-loaded tree\n            height = Math.ceil(Math.log(N) / Math.log(M));\n\n            // target number of root entries to maximize storage utilization\n            M = Math.ceil(N / Math.pow(M, height - 1));\n        }\n\n        node = createNode([]);\n        node.leaf = false;\n        node.height = height;\n\n        // split the items into M mostly square tiles\n\n        var N2 = Math.ceil(N / M),\n            N1 = N2 * Math.ceil(Math.sqrt(M)),\n            i, j, right2, right3;\n\n        multiSelect(items, left, right, N1, this.compareMinX);\n\n        for (i = left; i <= right; i += N1) {\n\n            right2 = Math.min(i + N1 - 1, right);\n\n            multiSelect(items, i, right2, N2, this.compareMinY);\n\n            for (j = i; j <= right2; j += N2) {\n\n                right3 = Math.min(j + N2 - 1, right2);\n\n                // pack each entry recursively\n                node.children.push(this._build(items, j, right3, height - 1));\n            }\n        }\n\n        calcBBox(node, this.toBBox);\n\n        return node;\n    },\n\n    _chooseSubtree: function (bbox, node, level, path) {\n\n        var i, len, child, targetNode, area, enlargement, minArea, minEnlargement;\n\n        while (true) {\n            path.push(node);\n\n            if (node.leaf || path.length - 1 === level) break;\n\n            minArea = minEnlargement = Infinity;\n\n            for (i = 0, len = node.children.length; i < len; i++) {\n                child = node.children[i];\n                area = bboxArea(child);\n                enlargement = enlargedArea(bbox, child) - area;\n\n                // choose entry with the least area enlargement\n                if (enlargement < minEnlargement) {\n                    minEnlargement = enlargement;\n                    minArea = area < minArea ? area : minArea;\n                    targetNode = child;\n\n                } else if (enlargement === minEnlargement) {\n                    // otherwise choose one with the smallest area\n                    if (area < minArea) {\n                        minArea = area;\n                        targetNode = child;\n                    }\n                }\n            }\n\n            node = targetNode || node.children[0];\n        }\n\n        return node;\n    },\n\n    _insert: function (item, level, isNode) {\n\n        var toBBox = this.toBBox,\n            bbox = isNode ? item : toBBox(item),\n            insertPath = [];\n\n        // find the best node for accommodating the item, saving all nodes along the path too\n        var node = this._chooseSubtree(bbox, this.data, level, insertPath);\n\n        // put the item into the node\n        node.children.push(item);\n        extend(node, bbox);\n\n        // split on node overflow; propagate upwards if necessary\n        while (level >= 0) {\n            if (insertPath[level].children.length > this._maxEntries) {\n                this._split(insertPath, level);\n                level--;\n            } else break;\n        }\n\n        // adjust bboxes along the insertion path\n        this._adjustParentBBoxes(bbox, insertPath, level);\n    },\n\n    // split overflowed node into two\n    _split: function (insertPath, level) {\n\n        var node = insertPath[level],\n            M = node.children.length,\n            m = this._minEntries;\n\n        this._chooseSplitAxis(node, m, M);\n\n        var splitIndex = this._chooseSplitIndex(node, m, M);\n\n        var newNode = createNode(node.children.splice(splitIndex, node.children.length - splitIndex));\n        newNode.height = node.height;\n        newNode.leaf = node.leaf;\n\n        calcBBox(node, this.toBBox);\n        calcBBox(newNode, this.toBBox);\n\n        if (level) insertPath[level - 1].children.push(newNode);\n        else this._splitRoot(node, newNode);\n    },\n\n    _splitRoot: function (node, newNode) {\n        // split root node\n        this.data = createNode([node, newNode]);\n        this.data.height = node.height + 1;\n        this.data.leaf = false;\n        calcBBox(this.data, this.toBBox);\n    },\n\n    _chooseSplitIndex: function (node, m, M) {\n\n        var i, bbox1, bbox2, overlap, area, minOverlap, minArea, index;\n\n        minOverlap = minArea = Infinity;\n\n        for (i = m; i <= M - m; i++) {\n            bbox1 = distBBox(node, 0, i, this.toBBox);\n            bbox2 = distBBox(node, i, M, this.toBBox);\n\n            overlap = intersectionArea(bbox1, bbox2);\n            area = bboxArea(bbox1) + bboxArea(bbox2);\n\n            // choose distribution with minimum overlap\n            if (overlap < minOverlap) {\n                minOverlap = overlap;\n                index = i;\n\n                minArea = area < minArea ? area : minArea;\n\n            } else if (overlap === minOverlap) {\n                // otherwise choose distribution with minimum area\n                if (area < minArea) {\n                    minArea = area;\n                    index = i;\n                }\n            }\n        }\n\n        return index;\n    },\n\n    // sorts node children by the best axis for split\n    _chooseSplitAxis: function (node, m, M) {\n\n        var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX,\n            compareMinY = node.leaf ? this.compareMinY : compareNodeMinY,\n            xMargin = this._allDistMargin(node, m, M, compareMinX),\n            yMargin = this._allDistMargin(node, m, M, compareMinY);\n\n        // if total distributions margin value is minimal for x, sort by minX,\n        // otherwise it's already sorted by minY\n        if (xMargin < yMargin) node.children.sort(compareMinX);\n    },\n\n    // total margin of all possible split distributions where each node is at least m full\n    _allDistMargin: function (node, m, M, compare) {\n\n        node.children.sort(compare);\n\n        var toBBox = this.toBBox,\n            leftBBox = distBBox(node, 0, m, toBBox),\n            rightBBox = distBBox(node, M - m, M, toBBox),\n            margin = bboxMargin(leftBBox) + bboxMargin(rightBBox),\n            i, child;\n\n        for (i = m; i < M - m; i++) {\n            child = node.children[i];\n            extend(leftBBox, node.leaf ? toBBox(child) : child);\n            margin += bboxMargin(leftBBox);\n        }\n\n        for (i = M - m - 1; i >= m; i--) {\n            child = node.children[i];\n            extend(rightBBox, node.leaf ? toBBox(child) : child);\n            margin += bboxMargin(rightBBox);\n        }\n\n        return margin;\n    },\n\n    _adjustParentBBoxes: function (bbox, path, level) {\n        // adjust bboxes along the given tree path\n        for (var i = level; i >= 0; i--) {\n            extend(path[i], bbox);\n        }\n    },\n\n    _condense: function (path) {\n        // go through the path, removing empty nodes and updating bboxes\n        for (var i = path.length - 1, siblings; i >= 0; i--) {\n            if (path[i].children.length === 0) {\n                if (i > 0) {\n                    siblings = path[i - 1].children;\n                    siblings.splice(siblings.indexOf(path[i]), 1);\n\n                } else this.clear();\n\n            } else calcBBox(path[i], this.toBBox);\n        }\n    },\n\n    _initFormat: function (format) {\n        // data format (minX, minY, maxX, maxY accessors)\n\n        // uses eval-type function compilation instead of just accepting a toBBox function\n        // because the algorithms are very sensitive to sorting functions performance,\n        // so they should be dead simple and without inner calls\n\n        var compareArr = ['return a', ' - b', ';'];\n\n        this.compareMinX = new Function('a', 'b', compareArr.join(format[0]));\n        this.compareMinY = new Function('a', 'b', compareArr.join(format[1]));\n\n        this.toBBox = new Function('a',\n            'return {minX: a' + format[0] +\n            ', minY: a' + format[1] +\n            ', maxX: a' + format[2] +\n            ', maxY: a' + format[3] + '};');\n    }\n};\n\nfunction findItem(item, items, equalsFn) {\n    if (!equalsFn) return items.indexOf(item);\n\n    for (var i = 0; i < items.length; i++) {\n        if (equalsFn(item, items[i])) return i;\n    }\n    return -1;\n}\n\n// calculate node's bbox from bboxes of its children\nfunction calcBBox(node, toBBox) {\n    distBBox(node, 0, node.children.length, toBBox, node);\n}\n\n// min bounding rectangle of node children from k to p-1\nfunction distBBox(node, k, p, toBBox, destNode) {\n    if (!destNode) destNode = createNode(null);\n    destNode.minX = Infinity;\n    destNode.minY = Infinity;\n    destNode.maxX = -Infinity;\n    destNode.maxY = -Infinity;\n\n    for (var i = k, child; i < p; i++) {\n        child = node.children[i];\n        extend(destNode, node.leaf ? toBBox(child) : child);\n    }\n\n    return destNode;\n}\n\nfunction extend(a, b) {\n    a.minX = Math.min(a.minX, b.minX);\n    a.minY = Math.min(a.minY, b.minY);\n    a.maxX = Math.max(a.maxX, b.maxX);\n    a.maxY = Math.max(a.maxY, b.maxY);\n    return a;\n}\n\nfunction compareNodeMinX(a, b) { return a.minX - b.minX; }\nfunction compareNodeMinY(a, b) { return a.minY - b.minY; }\n\nfunction bboxArea(a)   { return (a.maxX - a.minX) * (a.maxY - a.minY); }\nfunction bboxMargin(a) { return (a.maxX - a.minX) + (a.maxY - a.minY); }\n\nfunction enlargedArea(a, b) {\n    return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) *\n           (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));\n}\n\nfunction intersectionArea(a, b) {\n    var minX = Math.max(a.minX, b.minX),\n        minY = Math.max(a.minY, b.minY),\n        maxX = Math.min(a.maxX, b.maxX),\n        maxY = Math.min(a.maxY, b.maxY);\n\n    return Math.max(0, maxX - minX) *\n           Math.max(0, maxY - minY);\n}\n\nfunction contains(a, b) {\n    return a.minX <= b.minX &&\n           a.minY <= b.minY &&\n           b.maxX <= a.maxX &&\n           b.maxY <= a.maxY;\n}\n\nfunction intersects(a, b) {\n    return b.minX <= a.maxX &&\n           b.minY <= a.maxY &&\n           b.maxX >= a.minX &&\n           b.maxY >= a.minY;\n}\n\nfunction createNode(children) {\n    return {\n        children: children,\n        height: 1,\n        leaf: true,\n        minX: Infinity,\n        minY: Infinity,\n        maxX: -Infinity,\n        maxY: -Infinity\n    };\n}\n\n// sort an array so that items come in groups of n unsorted items, with groups sorted between each other;\n// combines selection algorithm with binary divide & conquer approach\n\nfunction multiSelect(arr, left, right, n, compare) {\n    var stack = [left, right],\n        mid;\n\n    while (stack.length) {\n        right = stack.pop();\n        left = stack.pop();\n\n        if (right - left <= n) continue;\n\n        mid = left + Math.ceil((right - left) / n / 2) * n;\n        quickselect(arr, mid, left, right, compare);\n\n        stack.push(left, mid, mid, right);\n    }\n}\n","(function (global, factory) {\n\ttypeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory(require('ol/control/Control'), require('ol/Observable')) :\n\ttypeof define === 'function' && define.amd ? define(['ol/control/Control', 'ol/Observable'], factory) :\n\t(global.LayerSwitcher = factory(global.ol.control.Control,global.ol.Observable));\n}(this, (function (Control,ol_Observable) { 'use strict';\n\nControl = 'default' in Control ? Control['default'] : Control;\n\nvar classCallCheck = function (instance, Constructor) {\n  if (!(instance instanceof Constructor)) {\n    throw new TypeError(\"Cannot call a class as a function\");\n  }\n};\n\nvar createClass = function () {\n  function defineProperties(target, props) {\n    for (var i = 0; i < props.length; i++) {\n      var descriptor = props[i];\n      descriptor.enumerable = descriptor.enumerable || false;\n      descriptor.configurable = true;\n      if (\"value\" in descriptor) descriptor.writable = true;\n      Object.defineProperty(target, descriptor.key, descriptor);\n    }\n  }\n\n  return function (Constructor, protoProps, staticProps) {\n    if (protoProps) defineProperties(Constructor.prototype, protoProps);\n    if (staticProps) defineProperties(Constructor, staticProps);\n    return Constructor;\n  };\n}();\n\n\n\n\n\n\n\nvar get = function get(object, property, receiver) {\n  if (object === null) object = Function.prototype;\n  var desc = Object.getOwnPropertyDescriptor(object, property);\n\n  if (desc === undefined) {\n    var parent = Object.getPrototypeOf(object);\n\n    if (parent === null) {\n      return undefined;\n    } else {\n      return get(parent, property, receiver);\n    }\n  } else if (\"value\" in desc) {\n    return desc.value;\n  } else {\n    var getter = desc.get;\n\n    if (getter === undefined) {\n      return undefined;\n    }\n\n    return getter.call(receiver);\n  }\n};\n\nvar inherits = function (subClass, superClass) {\n  if (typeof superClass !== \"function\" && superClass !== null) {\n    throw new TypeError(\"Super expression must either be null or a function, not \" + typeof superClass);\n  }\n\n  subClass.prototype = Object.create(superClass && superClass.prototype, {\n    constructor: {\n      value: subClass,\n      enumerable: false,\n      writable: true,\n      configurable: true\n    }\n  });\n  if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;\n};\n\n\n\n\n\n\n\n\n\n\n\nvar possibleConstructorReturn = function (self, call) {\n  if (!self) {\n    throw new ReferenceError(\"this hasn't been initialised - super() hasn't been called\");\n  }\n\n  return call && (typeof call === \"object\" || typeof call === \"function\") ? call : self;\n};\n\nvar CSS_PREFIX = 'layer-switcher-';\n\n/**\n * OpenLayers Layer Switcher Control.\n * See [the examples](./examples) for usage.\n * @constructor\n * @extends {ol/control/Control~Control}\n * @param {Object} opt_options Control options, extends ol/control/Control~Control#options adding:\n * @param {String} opt_options.tipLabel the button tooltip.\n * @param {String} opt_options.groupSelectStyle either `'none'` - groups don't get a checkbox,\n *   `'children'` (default) groups have a checkbox and affect child visibility or\n *   `'group'` groups have a checkbox but do not alter child visibility (like QGIS).\n */\n\nvar LayerSwitcher = function (_Control) {\n    inherits(LayerSwitcher, _Control);\n\n    function LayerSwitcher(opt_options) {\n        classCallCheck(this, LayerSwitcher);\n\n\n        var options = opt_options || {};\n\n        var tipLabel = options.tipLabel ? options.tipLabel : 'Legend';\n\n        var element = document.createElement('div');\n\n        var _this = possibleConstructorReturn(this, (LayerSwitcher.__proto__ || Object.getPrototypeOf(LayerSwitcher)).call(this, { element: element, target: options.target }));\n\n        _this.groupSelectStyle = ['none', 'children', 'group'].indexOf(options.groupSelectStyle) >= 0 ? options.groupSelectStyle : 'children';\n\n        _this.mapListeners = [];\n\n        _this.hiddenClassName = 'ol-unselectable ol-control layer-switcher';\n        if (LayerSwitcher.isTouchDevice_()) {\n            _this.hiddenClassName += ' touch';\n        }\n        _this.shownClassName = 'shown';\n\n        element.className = _this.hiddenClassName;\n\n        var button = document.createElement('button');\n        button.setAttribute('title', tipLabel);\n        element.appendChild(button);\n\n        _this.panel = document.createElement('div');\n        _this.panel.className = 'panel';\n        element.appendChild(_this.panel);\n        LayerSwitcher.enableTouchScroll_(_this.panel);\n\n        var this_ = _this;\n\n        button.onmouseover = function (e) {\n            this_.showPanel();\n        };\n\n        button.onclick = function (e) {\n            e = e || window.event;\n            this_.showPanel();\n            e.preventDefault();\n        };\n\n        this_.panel.onmouseout = function (e) {\n            e = e || window.event;\n            if (!this_.panel.contains(e.toElement || e.relatedTarget)) {\n                this_.hidePanel();\n            }\n        };\n\n        return _this;\n    }\n\n    /**\n    * Set the map instance the control is associated with.\n    * @param {ol/Map~Map} map The map instance.\n    */\n\n\n    createClass(LayerSwitcher, [{\n        key: 'setMap',\n        value: function setMap(map) {\n            // Clean up listeners associated with the previous map\n            for (var i = 0, key; i < this.mapListeners.length; i++) {\n                ol_Observable.unByKey(this.mapListeners[i]);\n            }\n            this.mapListeners.length = 0;\n            // Wire up listeners etc. and store reference to new map\n            get(LayerSwitcher.prototype.__proto__ || Object.getPrototypeOf(LayerSwitcher.prototype), 'setMap', this).call(this, map);\n            if (map) {\n                var this_ = this;\n                this.mapListeners.push(map.on('pointerdown', function () {\n                    this_.hidePanel();\n                }));\n                this.renderPanel();\n            }\n        }\n\n        /**\n        * Show the layer panel.\n        */\n\n    }, {\n        key: 'showPanel',\n        value: function showPanel() {\n            if (!this.element.classList.contains(this.shownClassName)) {\n                this.element.classList.add(this.shownClassName);\n                this.renderPanel();\n            }\n        }\n\n        /**\n        * Hide the layer panel.\n        */\n\n    }, {\n        key: 'hidePanel',\n        value: function hidePanel() {\n            if (this.element.classList.contains(this.shownClassName)) {\n                this.element.classList.remove(this.shownClassName);\n            }\n        }\n\n        /**\n        * Re-draw the layer panel to represent the current state of the layers.\n        */\n\n    }, {\n        key: 'renderPanel',\n        value: function renderPanel() {\n            LayerSwitcher.renderPanel(this.getMap(), this.panel, {\n                groupSelectStyle: this.groupSelectStyle\n            });\n        }\n\n        /**\n        * **Static** Re-draw the layer panel to represent the current state of the layers.\n        * @param {ol/Map~Map} map The OpenLayers Map instance to render layers for\n        * @param {Element} panel The DOM Element into which the layer tree will be rendered\n        */\n\n    }], [{\n        key: 'renderPanel',\n        value: function renderPanel(map, panel, options) {\n\n            options = options || {};\n\n            LayerSwitcher.ensureTopVisibleBaseLayerShown_(map);\n\n            while (panel.firstChild) {\n                panel.removeChild(panel.firstChild);\n            }\n\n            // Reset indeterminate state for all layers and groups before\n            // applying based on groupSelectStyle\n            LayerSwitcher.forEachRecursive(map, function (l, idx, a) {\n                l.set('indeterminate', false);\n            });\n\n            if (options.groupSelectStyle === 'children' || options.groupSelectStyle === 'none') {\n                // Set visibile and indeterminate state of groups based on\n                // their children's visibility\n                LayerSwitcher.setGroupVisibility(map);\n            } else if (options.groupSelectStyle === 'group') {\n                // Set child indetermiate state based on their parent's visibility\n                LayerSwitcher.setChildVisibility(map);\n            }\n\n            var ul = document.createElement('ul');\n            panel.appendChild(ul);\n            // passing two map arguments instead of lyr as we're passing the map as the root of the layers tree\n            LayerSwitcher.renderLayers_(map, map, ul, options, function render(changedLyr) {\n                // console.log('render');\n                LayerSwitcher.renderPanel(map, panel, options);\n            });\n        }\n    }, {\n        key: 'isBaseGroup',\n        value: function isBaseGroup(lyr) {\n            var lyrs = lyr.getLayers ? lyr.getLayers().getArray() : [];\n            return lyrs.length && lyrs[0].get('type') === 'base';\n        }\n    }, {\n        key: 'setGroupVisibility',\n        value: function setGroupVisibility(map) {\n            // Get a list of groups, with the deepest first\n            var groups = LayerSwitcher.getGroupsAndLayers(map, function (l) {\n                return l.getLayers && !l.get('combine') && !LayerSwitcher.isBaseGroup(l);\n            }).reverse();\n            // console.log(groups.map(g => g.get('title')));\n            groups.forEach(function (group) {\n                // TODO Can we use getLayersArray, is it public in the esm build?\n                var descendantVisibility = group.getLayersArray().map(function (l) {\n                    var state = l.getVisible();\n                    // console.log('>', l.get('title'), state);\n                    return state;\n                });\n                // console.log(descendantVisibility);\n                if (descendantVisibility.every(function (v) {\n                    return v === true;\n                })) {\n                    group.setVisible(true);\n                    group.set('indeterminate', false);\n                } else if (descendantVisibility.every(function (v) {\n                    return v === false;\n                })) {\n                    group.setVisible(false);\n                    group.set('indeterminate', false);\n                } else {\n                    group.setVisible(true);\n                    group.set('indeterminate', true);\n                }\n            });\n        }\n    }, {\n        key: 'setChildVisibility',\n        value: function setChildVisibility(map) {\n            // console.log('setChildVisibility');\n            var groups = LayerSwitcher.getGroupsAndLayers(map, function (l) {\n                return l.getLayers && !l.get('combine') && !LayerSwitcher.isBaseGroup(l);\n            });\n            groups.forEach(function (group) {\n                // console.log(group.get('title'));\n                var groupVisible = group.getVisible();\n                var groupIndeterminate = group.get('indeterminate');\n                group.getLayers().getArray().forEach(function (l) {\n                    // console.log('>', l.get('title'));\n                    l.set('indeterminate', false);\n                    if ((!groupVisible || groupIndeterminate) && l.getVisible()) {\n                        l.set('indeterminate', true);\n                    }\n                });\n            });\n        }\n\n        /**\n        * **Static** Ensure only the top-most base layer is visible if more than one is visible.\n        * @param {ol/Map~Map} map The map instance.\n        * @private\n        */\n\n    }, {\n        key: 'ensureTopVisibleBaseLayerShown_',\n        value: function ensureTopVisibleBaseLayerShown_(map) {\n            var lastVisibleBaseLyr;\n            LayerSwitcher.forEachRecursive(map, function (l, idx, a) {\n                if (l.get('type') === 'base' && l.getVisible()) {\n                    lastVisibleBaseLyr = l;\n                }\n            });\n            if (lastVisibleBaseLyr) LayerSwitcher.setVisible_(map, lastVisibleBaseLyr, true);\n        }\n    }, {\n        key: 'getGroupsAndLayers',\n        value: function getGroupsAndLayers(lyr, filterFn) {\n            var layers = [];\n            filterFn = filterFn || function (l, idx, a) {\n                return true;\n            };\n            LayerSwitcher.forEachRecursive(lyr, function (l, idx, a) {\n                if (l.get('title')) {\n                    if (filterFn(l, idx, a)) {\n                        layers.push(l);\n                    }\n                }\n            });\n            return layers;\n        }\n\n        /**\n        * **Static** Toggle the visible state of a layer.\n        * Takes care of hiding other layers in the same exclusive group if the layer\n        * is toggle to visible.\n        * @private\n        * @param {ol/Map~Map} map The map instance.\n        * @param {ol/layer/Base~BaseLayer} The layer whose visibility will be toggled.\n        */\n\n    }, {\n        key: 'setVisible_',\n        value: function setVisible_(map, lyr, visible, groupSelectStyle) {\n            // console.log(lyr.get('title'), visible, groupSelectStyle);\n            lyr.setVisible(visible);\n            if (visible && lyr.get('type') === 'base') {\n                // Hide all other base layers regardless of grouping\n                LayerSwitcher.forEachRecursive(map, function (l, idx, a) {\n                    if (l != lyr && l.get('type') === 'base') {\n                        l.setVisible(false);\n                    }\n                });\n            }\n            if (lyr.getLayers && !lyr.get('combine') && groupSelectStyle === 'children') {\n                lyr.getLayers().forEach(function (l) {\n                    LayerSwitcher.setVisible_(map, l, lyr.getVisible(), groupSelectStyle);\n                });\n            }\n        }\n\n        /**\n        * **Static** Render all layers that are children of a group.\n        * @private\n        * @param {ol/Map~Map} map The map instance.\n        * @param {ol/layer/Base~BaseLayer} lyr Layer to be rendered (should have a title property).\n        * @param {Number} idx Position in parent group list.\n        */\n\n    }, {\n        key: 'renderLayer_',\n        value: function renderLayer_(map, lyr, idx, options, render) {\n\n            var li = document.createElement('li');\n\n            var lyrTitle = lyr.get('title');\n\n            var checkboxId = LayerSwitcher.uuid();\n\n            var label = document.createElement('label');\n\n            if (lyr.getLayers && !lyr.get('combine')) {\n\n                var isBaseGroup = LayerSwitcher.isBaseGroup(lyr);\n\n                li.classList.add('group');\n                if (isBaseGroup) {\n                    li.classList.add(CSS_PREFIX + 'base-group');\n                }\n\n                // Group folding\n                if (lyr.get('fold')) {\n                    li.classList.add(CSS_PREFIX + 'fold');\n                    li.classList.add(CSS_PREFIX + lyr.get('fold'));\n                    var btn = document.createElement('button');\n                    btn.onclick = function (e) {\n                        LayerSwitcher.toggleFold_(lyr, li);\n                    };\n                    li.appendChild(btn);\n                }\n\n                if (!isBaseGroup && options.groupSelectStyle != 'none') {\n                    var _input = document.createElement('input');\n                    _input.type = 'checkbox';\n                    _input.id = checkboxId;\n                    _input.checked = lyr.getVisible();\n                    _input.indeterminate = lyr.get('indeterminate');\n                    _input.onchange = function (e) {\n                        LayerSwitcher.setVisible_(map, lyr, e.target.checked, options.groupSelectStyle);\n                        render(lyr);\n                    };\n                    li.appendChild(_input);\n                    label.htmlFor = checkboxId;\n                }\n\n                label.innerHTML = lyrTitle;\n                li.appendChild(label);\n                var ul = document.createElement('ul');\n                li.appendChild(ul);\n\n                LayerSwitcher.renderLayers_(map, lyr, ul, options, render);\n            } else {\n\n                li.className = 'layer';\n                var input = document.createElement('input');\n                if (lyr.get('type') === 'base') {\n                    input.type = 'radio';\n                    input.name = 'base';\n                } else {\n                    input.type = 'checkbox';\n                }\n                input.id = checkboxId;\n                input.checked = lyr.get('visible');\n                input.indeterminate = lyr.get('indeterminate');\n                input.onchange = function (e) {\n                    LayerSwitcher.setVisible_(map, lyr, e.target.checked, options.groupSelectStyle);\n                    render(lyr);\n                };\n                li.appendChild(input);\n\n                label.htmlFor = checkboxId;\n                label.innerHTML = lyrTitle;\n\n                var rsl = map.getView().getResolution();\n                if (rsl > lyr.getMaxResolution() || rsl < lyr.getMinResolution()) {\n                    label.className += ' disabled';\n                }\n\n                li.appendChild(label);\n            }\n\n            return li;\n        }\n\n        /**\n        * **Static** Render all layers that are children of a group.\n        * @private\n        * @param {ol/Map~Map} map The map instance.\n        * @param {ol/layer/Group~LayerGroup} lyr Group layer whose children will be rendered.\n        * @param {Element} elm DOM element that children will be appended to.\n        */\n\n    }, {\n        key: 'renderLayers_',\n        value: function renderLayers_(map, lyr, elm, options, render) {\n            var lyrs = lyr.getLayers().getArray().slice().reverse();\n            for (var i = 0, l; i < lyrs.length; i++) {\n                l = lyrs[i];\n                if (l.get('title')) {\n                    elm.appendChild(LayerSwitcher.renderLayer_(map, l, i, options, render));\n                }\n            }\n        }\n\n        /**\n        * **Static** Call the supplied function for each layer in the passed layer group\n        * recursing nested groups.\n        * @param {ol/layer/Group~LayerGroup} lyr The layer group to start iterating from.\n        * @param {Function} fn Callback which will be called for each `ol/layer/Base~BaseLayer`\n        * found under `lyr`. The signature for `fn` is the same as `ol/Collection~Collection#forEach`\n        */\n\n    }, {\n        key: 'forEachRecursive',\n        value: function forEachRecursive(lyr, fn) {\n            lyr.getLayers().forEach(function (lyr, idx, a) {\n                fn(lyr, idx, a);\n                if (lyr.getLayers) {\n                    LayerSwitcher.forEachRecursive(lyr, fn);\n                }\n            });\n        }\n\n        /**\n        * **Static** Generate a UUID\n        * Adapted from http://stackoverflow.com/a/2117523/526860\n        * @returns {String} UUID\n        */\n\n    }, {\n        key: 'uuid',\n        value: function uuid() {\n            return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {\n                var r = Math.random() * 16 | 0,\n                    v = c == 'x' ? r : r & 0x3 | 0x8;\n                return v.toString(16);\n            });\n        }\n\n        /**\n        * @private\n        * @desc Apply workaround to enable scrolling of overflowing content within an\n        * element. Adapted from https://gist.github.com/chrismbarr/4107472\n        */\n\n    }, {\n        key: 'enableTouchScroll_',\n        value: function enableTouchScroll_(elm) {\n            if (LayerSwitcher.isTouchDevice_()) {\n                var scrollStartPos = 0;\n                elm.addEventListener(\"touchstart\", function (event) {\n                    scrollStartPos = this.scrollTop + event.touches[0].pageY;\n                }, false);\n                elm.addEventListener(\"touchmove\", function (event) {\n                    this.scrollTop = scrollStartPos - event.touches[0].pageY;\n                }, false);\n            }\n        }\n\n        /**\n        * @private\n        * @desc Determine if the current browser supports touch events. Adapted from\n        * https://gist.github.com/chrismbarr/4107472\n        */\n\n    }, {\n        key: 'isTouchDevice_',\n        value: function isTouchDevice_() {\n            try {\n                document.createEvent(\"TouchEvent\");\n                return true;\n            } catch (e) {\n                return false;\n            }\n        }\n\n        /**\n        * Fold/unfold layer group\n        * @private\n        */\n\n    }, {\n        key: 'toggleFold_',\n        value: function toggleFold_(lyr, li) {\n            li.classList.remove(CSS_PREFIX + lyr.get('fold'));\n            lyr.set('fold', lyr.get('fold') === 'open' ? 'close' : 'open');\n            li.classList.add(CSS_PREFIX + lyr.get('fold'));\n        }\n    }]);\n    return LayerSwitcher;\n}(Control);\n\nif (window.ol && window.ol.control) {\n    window.ol.control.LayerSwitcher = LayerSwitcher;\n}\n\nreturn LayerSwitcher;\n\n})));\n","(function (global, factory) {\n\ttypeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :\n\ttypeof define === 'function' && define.amd ? define(factory) :\n\t(global.quickselect = factory());\n}(this, (function () { 'use strict';\n\nfunction quickselect(arr, k, left, right, compare) {\n    quickselectStep(arr, k, left || 0, right || (arr.length - 1), compare || defaultCompare);\n}\n\nfunction quickselectStep(arr, k, left, right, compare) {\n\n    while (right > left) {\n        if (right - left > 600) {\n            var n = right - left + 1;\n            var m = k - left + 1;\n            var z = Math.log(n);\n            var s = 0.5 * Math.exp(2 * z / 3);\n            var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);\n            var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));\n            var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));\n            quickselectStep(arr, k, newLeft, newRight, compare);\n        }\n\n        var t = arr[k];\n        var i = left;\n        var j = right;\n\n        swap(arr, left, k);\n        if (compare(arr[right], t) > 0) swap(arr, left, right);\n\n        while (i < j) {\n            swap(arr, i, j);\n            i++;\n            j--;\n            while (compare(arr[i], t) < 0) i++;\n            while (compare(arr[j], t) > 0) j--;\n        }\n\n        if (compare(arr[left], t) === 0) swap(arr, left, j);\n        else {\n            j++;\n            swap(arr, j, right);\n        }\n\n        if (j <= k) left = j + 1;\n        if (k <= j) right = j - 1;\n    }\n}\n\nfunction swap(arr, i, j) {\n    var tmp = arr[i];\n    arr[i] = arr[j];\n    arr[j] = tmp;\n}\n\nfunction defaultCompare(a, b) {\n    return a < b ? -1 : a > b ? 1 : 0;\n}\n\nreturn quickselect;\n\n})));\n","// extracted by mini-css-extract-plugin","/**\n * @module ol/AssertionError\n */\nimport {VERSION} from './util.js';\n\n/**\n * Error object thrown when an assertion failed. This is an ECMA-262 Error,\n * extended with a `code` property.\n * See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error.\n */\nvar AssertionError = /*@__PURE__*/(function (Error) {\n  function AssertionError(code) {\n    var path = VERSION === 'latest' ? VERSION : 'v' + VERSION.split('-')[0];\n    var message = 'Assertion failed. See https://openlayers.org/en/' + path +\n    '/doc/errors/#' + code + ' for details.';\n\n    Error.call(this, message);\n\n    /**\n     * Error code. The meaning of the code can be found on\n     * https://openlayers.org/en/latest/doc/errors/ (replace `latest` with\n     * the version found in the OpenLayers script's header comment if a version\n     * other than the latest is used).\n     * @type {number}\n     * @api\n     */\n    this.code = code;\n\n    /**\n     * @type {string}\n     */\n    this.name = 'AssertionError';\n\n    // Re-assign message, see https://github.com/Rich-Harris/buble/issues/40\n    this.message = message;\n  }\n\n  if ( Error ) AssertionError.__proto__ = Error;\n  AssertionError.prototype = Object.create( Error && Error.prototype );\n  AssertionError.prototype.constructor = AssertionError;\n\n  return AssertionError;\n}(Error));\n\nexport default AssertionError;\n\n//# sourceMappingURL=AssertionError.js.map","/**\n * @module ol/CollectionEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  /**\n   * Triggered when an item is added to the collection.\n   * @event module:ol/Collection.CollectionEvent#add\n   * @api\n   */\n  ADD: 'add',\n  /**\n   * Triggered when an item is removed from the collection.\n   * @event module:ol/Collection.CollectionEvent#remove\n   * @api\n   */\n  REMOVE: 'remove'\n};\n\n//# sourceMappingURL=CollectionEventType.js.map","/**\n * @module ol/Collection\n */\nimport AssertionError from './AssertionError.js';\nimport CollectionEventType from './CollectionEventType.js';\nimport BaseObject from './Object.js';\nimport Event from './events/Event.js';\n\n\n/**\n * @enum {string}\n * @private\n */\nvar Property = {\n  LENGTH: 'length'\n};\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/Collection~Collection} instances are instances of this\n * type.\n */\nexport var CollectionEvent = /*@__PURE__*/(function (Event) {\n  function CollectionEvent(type, opt_element) {\n    Event.call(this, type);\n\n    /**\n     * The element that is added to or removed from the collection.\n     * @type {*}\n     * @api\n     */\n    this.element = opt_element;\n\n  }\n\n  if ( Event ) CollectionEvent.__proto__ = Event;\n  CollectionEvent.prototype = Object.create( Event && Event.prototype );\n  CollectionEvent.prototype.constructor = CollectionEvent;\n\n  return CollectionEvent;\n}(Event));\n\n\n/**\n * @typedef {Object} Options\n * @property {boolean} [unique=false] Disallow the same item from being added to\n * the collection twice.\n */\n\n/**\n * @classdesc\n * An expanded version of standard JS Array, adding convenience methods for\n * manipulation. Add and remove changes to the Collection trigger a Collection\n * event. Note that this does not cover changes to the objects _within_ the\n * Collection; they trigger events on the appropriate object, not on the\n * Collection as a whole.\n *\n * @fires CollectionEvent\n *\n * @template T\n * @api\n */\nvar Collection = /*@__PURE__*/(function (BaseObject) {\n  function Collection(opt_array, opt_options) {\n\n    BaseObject.call(this);\n\n    var options = opt_options || {};\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.unique_ = !!options.unique;\n\n    /**\n     * @private\n     * @type {!Array<T>}\n     */\n    this.array_ = opt_array ? opt_array : [];\n\n    if (this.unique_) {\n      for (var i = 0, ii = this.array_.length; i < ii; ++i) {\n        this.assertUnique_(this.array_[i], i);\n      }\n    }\n\n    this.updateLength_();\n\n  }\n\n  if ( BaseObject ) Collection.__proto__ = BaseObject;\n  Collection.prototype = Object.create( BaseObject && BaseObject.prototype );\n  Collection.prototype.constructor = Collection;\n\n  /**\n   * Remove all elements from the collection.\n   * @api\n   */\n  Collection.prototype.clear = function clear () {\n    while (this.getLength() > 0) {\n      this.pop();\n    }\n  };\n\n  /**\n   * Add elements to the collection.  This pushes each item in the provided array\n   * to the end of the collection.\n   * @param {!Array<T>} arr Array.\n   * @return {Collection<T>} This collection.\n   * @api\n   */\n  Collection.prototype.extend = function extend (arr) {\n    for (var i = 0, ii = arr.length; i < ii; ++i) {\n      this.push(arr[i]);\n    }\n    return this;\n  };\n\n  /**\n   * Iterate over each element, calling the provided callback.\n   * @param {function(T, number, Array<T>): *} f The function to call\n   *     for every element. This function takes 3 arguments (the element, the\n   *     index and the array). The return value is ignored.\n   * @api\n   */\n  Collection.prototype.forEach = function forEach (f) {\n    var array = this.array_;\n    for (var i = 0, ii = array.length; i < ii; ++i) {\n      f(array[i], i, array);\n    }\n  };\n\n  /**\n   * Get a reference to the underlying Array object. Warning: if the array\n   * is mutated, no events will be dispatched by the collection, and the\n   * collection's \"length\" property won't be in sync with the actual length\n   * of the array.\n   * @return {!Array<T>} Array.\n   * @api\n   */\n  Collection.prototype.getArray = function getArray () {\n    return this.array_;\n  };\n\n  /**\n   * Get the element at the provided index.\n   * @param {number} index Index.\n   * @return {T} Element.\n   * @api\n   */\n  Collection.prototype.item = function item (index) {\n    return this.array_[index];\n  };\n\n  /**\n   * Get the length of this collection.\n   * @return {number} The length of the array.\n   * @observable\n   * @api\n   */\n  Collection.prototype.getLength = function getLength () {\n    return this.get(Property.LENGTH);\n  };\n\n  /**\n   * Insert an element at the provided index.\n   * @param {number} index Index.\n   * @param {T} elem Element.\n   * @api\n   */\n  Collection.prototype.insertAt = function insertAt (index, elem) {\n    if (this.unique_) {\n      this.assertUnique_(elem);\n    }\n    this.array_.splice(index, 0, elem);\n    this.updateLength_();\n    this.dispatchEvent(\n      new CollectionEvent(CollectionEventType.ADD, elem));\n  };\n\n  /**\n   * Remove the last element of the collection and return it.\n   * Return `undefined` if the collection is empty.\n   * @return {T|undefined} Element.\n   * @api\n   */\n  Collection.prototype.pop = function pop () {\n    return this.removeAt(this.getLength() - 1);\n  };\n\n  /**\n   * Insert the provided element at the end of the collection.\n   * @param {T} elem Element.\n   * @return {number} New length of the collection.\n   * @api\n   */\n  Collection.prototype.push = function push (elem) {\n    if (this.unique_) {\n      this.assertUnique_(elem);\n    }\n    var n = this.getLength();\n    this.insertAt(n, elem);\n    return this.getLength();\n  };\n\n  /**\n   * Remove the first occurrence of an element from the collection.\n   * @param {T} elem Element.\n   * @return {T|undefined} The removed element or undefined if none found.\n   * @api\n   */\n  Collection.prototype.remove = function remove (elem) {\n    var arr = this.array_;\n    for (var i = 0, ii = arr.length; i < ii; ++i) {\n      if (arr[i] === elem) {\n        return this.removeAt(i);\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * Remove the element at the provided index and return it.\n   * Return `undefined` if the collection does not contain this index.\n   * @param {number} index Index.\n   * @return {T|undefined} Value.\n   * @api\n   */\n  Collection.prototype.removeAt = function removeAt (index) {\n    var prev = this.array_[index];\n    this.array_.splice(index, 1);\n    this.updateLength_();\n    this.dispatchEvent(new CollectionEvent(CollectionEventType.REMOVE, prev));\n    return prev;\n  };\n\n  /**\n   * Set the element at the provided index.\n   * @param {number} index Index.\n   * @param {T} elem Element.\n   * @api\n   */\n  Collection.prototype.setAt = function setAt (index, elem) {\n    var n = this.getLength();\n    if (index < n) {\n      if (this.unique_) {\n        this.assertUnique_(elem, index);\n      }\n      var prev = this.array_[index];\n      this.array_[index] = elem;\n      this.dispatchEvent(\n        new CollectionEvent(CollectionEventType.REMOVE, prev));\n      this.dispatchEvent(\n        new CollectionEvent(CollectionEventType.ADD, elem));\n    } else {\n      for (var j = n; j < index; ++j) {\n        this.insertAt(j, undefined);\n      }\n      this.insertAt(index, elem);\n    }\n  };\n\n  /**\n   * @private\n   */\n  Collection.prototype.updateLength_ = function updateLength_ () {\n    this.set(Property.LENGTH, this.array_.length);\n  };\n\n  /**\n   * @private\n   * @param {T} elem Element.\n   * @param {number=} opt_except Optional index to ignore.\n   */\n  Collection.prototype.assertUnique_ = function assertUnique_ (elem, opt_except) {\n    for (var i = 0, ii = this.array_.length; i < ii; ++i) {\n      if (this.array_[i] === elem && i !== opt_except) {\n        throw new AssertionError(58);\n      }\n    }\n  };\n\n  return Collection;\n}(BaseObject));\n\n\nexport default Collection;\n\n//# sourceMappingURL=Collection.js.map","/**\n * @module ol/MapEvent\n */\nimport Event from './events/Event.js';\n\n/**\n * @classdesc\n * Events emitted as map events are instances of this type.\n * See {@link module:ol/PluggableMap~PluggableMap} for which events trigger a map event.\n */\nvar MapEvent = /*@__PURE__*/(function (Event) {\n  function MapEvent(type, map, opt_frameState) {\n\n    Event.call(this, type);\n\n    /**\n     * The map where the event occurred.\n     * @type {import(\"./PluggableMap.js\").default}\n     * @api\n     */\n    this.map = map;\n\n    /**\n     * The frame state at the time of the event.\n     * @type {?import(\"./PluggableMap.js\").FrameState}\n     * @api\n     */\n    this.frameState = opt_frameState !== undefined ? opt_frameState : null;\n\n  }\n\n  if ( Event ) MapEvent.__proto__ = Event;\n  MapEvent.prototype = Object.create( Event && Event.prototype );\n  MapEvent.prototype.constructor = MapEvent;\n\n  return MapEvent;\n}(Event));\n\nexport default MapEvent;\n\n//# sourceMappingURL=MapEvent.js.map","/**\n * @module ol/MapBrowserEvent\n */\nimport MapEvent from './MapEvent.js';\n\n/**\n * @classdesc\n * Events emitted as map browser events are instances of this type.\n * See {@link module:ol/PluggableMap~PluggableMap} for which events trigger a map browser event.\n */\nvar MapBrowserEvent = /*@__PURE__*/(function (MapEvent) {\n  function MapBrowserEvent(type, map, browserEvent, opt_dragging, opt_frameState) {\n\n    MapEvent.call(this, type, map, opt_frameState);\n\n    /**\n     * The original browser event.\n     * @const\n     * @type {Event}\n     * @api\n     */\n    this.originalEvent = browserEvent;\n\n    /**\n     * The map pixel relative to the viewport corresponding to the original browser event.\n     * @type {import(\"./pixel.js\").Pixel}\n     * @api\n     */\n    this.pixel = map.getEventPixel(browserEvent);\n\n    /**\n     * The coordinate in view projection corresponding to the original browser event.\n     * @type {import(\"./coordinate.js\").Coordinate}\n     * @api\n     */\n    this.coordinate = map.getCoordinateFromPixel(this.pixel);\n\n    /**\n     * Indicates if the map is currently being dragged. Only set for\n     * `POINTERDRAG` and `POINTERMOVE` events. Default is `false`.\n     *\n     * @type {boolean}\n     * @api\n     */\n    this.dragging = opt_dragging !== undefined ? opt_dragging : false;\n\n  }\n\n  if ( MapEvent ) MapBrowserEvent.__proto__ = MapEvent;\n  MapBrowserEvent.prototype = Object.create( MapEvent && MapEvent.prototype );\n  MapBrowserEvent.prototype.constructor = MapBrowserEvent;\n\n  /**\n   * Prevents the default browser action.\n   * See https://developer.mozilla.org/en-US/docs/Web/API/event.preventDefault.\n   * @override\n   * @api\n   */\n  MapBrowserEvent.prototype.preventDefault = function preventDefault () {\n    MapEvent.prototype.preventDefault.call(this);\n    this.originalEvent.preventDefault();\n  };\n\n  /**\n   * Prevents further propagation of the current event.\n   * See https://developer.mozilla.org/en-US/docs/Web/API/event.stopPropagation.\n   * @override\n   * @api\n   */\n  MapBrowserEvent.prototype.stopPropagation = function stopPropagation () {\n    MapEvent.prototype.stopPropagation.call(this);\n    this.originalEvent.stopPropagation();\n  };\n\n  return MapBrowserEvent;\n}(MapEvent));\n\n\nexport default MapBrowserEvent;\n\n//# sourceMappingURL=MapBrowserEvent.js.map","/**\n * @module ol/has\n */\n\nvar ua = typeof navigator !== 'undefined' ?\n  navigator.userAgent.toLowerCase() : '';\n\n/**\n * User agent string says we are dealing with Firefox as browser.\n * @type {boolean}\n */\nexport var FIREFOX = ua.indexOf('firefox') !== -1;\n\n/**\n * User agent string says we are dealing with Safari as browser.\n * @type {boolean}\n */\nexport var SAFARI = ua.indexOf('safari') !== -1 && ua.indexOf('chrom') == -1;\n\n/**\n * User agent string says we are dealing with a WebKit engine.\n * @type {boolean}\n */\nexport var WEBKIT = ua.indexOf('webkit') !== -1 && ua.indexOf('edge') == -1;\n\n/**\n * User agent string says we are dealing with a Mac as platform.\n * @type {boolean}\n */\nexport var MAC = ua.indexOf('macintosh') !== -1;\n\n\n/**\n * The ratio between physical pixels and device-independent pixels\n * (dips) on the device (`window.devicePixelRatio`).\n * @const\n * @type {number}\n * @api\n */\nexport var DEVICE_PIXEL_RATIO = window.devicePixelRatio || 1;\n\n\n/**\n * True if the browser's Canvas implementation implements {get,set}LineDash.\n * @type {boolean}\n */\nexport var CANVAS_LINE_DASH = function() {\n  var has = false;\n  try {\n    has = !!document.createElement('canvas').getContext('2d').setLineDash;\n  } catch (e) {\n    // pass\n  }\n  return has;\n}();\n\n\n/**\n * Is HTML5 geolocation supported in the current browser?\n * @const\n * @type {boolean}\n * @api\n */\nexport var GEOLOCATION = 'geolocation' in navigator;\n\n\n/**\n * True if browser supports touch events.\n * @const\n * @type {boolean}\n * @api\n */\nexport var TOUCH = 'ontouchstart' in window;\n\n\n/**\n * True if browser supports pointer events.\n * @const\n * @type {boolean}\n */\nexport var POINTER = 'PointerEvent' in window;\n\n\n/**\n * True if browser supports ms pointer events (IE 10).\n * @const\n * @type {boolean}\n */\nexport var MSPOINTER = !!(navigator.msPointerEnabled);\n\n\nexport {HAS as WEBGL} from './webgl.js';\n\n//# sourceMappingURL=has.js.map","/**\n * @module ol/MapBrowserEventType\n */\nimport EventType from './events/EventType.js';\n\n/**\n * Constants for event names.\n * @enum {string}\n */\nexport default {\n\n  /**\n   * A true single click with no dragging and no double click. Note that this\n   * event is delayed by 250 ms to ensure that it is not a double click.\n   * @event module:ol/MapBrowserEvent~MapBrowserEvent#singleclick\n   * @api\n   */\n  SINGLECLICK: 'singleclick',\n\n  /**\n   * A click with no dragging. A double click will fire two of this.\n   * @event module:ol/MapBrowserEvent~MapBrowserEvent#click\n   * @api\n   */\n  CLICK: EventType.CLICK,\n\n  /**\n   * A true double click, with no dragging.\n   * @event module:ol/MapBrowserEvent~MapBrowserEvent#dblclick\n   * @api\n   */\n  DBLCLICK: EventType.DBLCLICK,\n\n  /**\n   * Triggered when a pointer is dragged.\n   * @event module:ol/MapBrowserEvent~MapBrowserEvent#pointerdrag\n   * @api\n   */\n  POINTERDRAG: 'pointerdrag',\n\n  /**\n   * Triggered when a pointer is moved. Note that on touch devices this is\n   * triggered when the map is panned, so is not the same as mousemove.\n   * @event module:ol/MapBrowserEvent~MapBrowserEvent#pointermove\n   * @api\n   */\n  POINTERMOVE: 'pointermove',\n\n  POINTERDOWN: 'pointerdown',\n  POINTERUP: 'pointerup',\n  POINTEROVER: 'pointerover',\n  POINTEROUT: 'pointerout',\n  POINTERENTER: 'pointerenter',\n  POINTERLEAVE: 'pointerleave',\n  POINTERCANCEL: 'pointercancel'\n};\n\n//# sourceMappingURL=MapBrowserEventType.js.map","/**\n * @module ol/MapBrowserPointerEvent\n */\nimport MapBrowserEvent from './MapBrowserEvent.js';\n\nvar MapBrowserPointerEvent = /*@__PURE__*/(function (MapBrowserEvent) {\n  function MapBrowserPointerEvent(type, map, pointerEvent, opt_dragging, opt_frameState) {\n\n    MapBrowserEvent.call(this, type, map, pointerEvent.originalEvent, opt_dragging, opt_frameState);\n\n    /**\n     * @const\n     * @type {import(\"./pointer/PointerEvent.js\").default}\n     */\n    this.pointerEvent = pointerEvent;\n\n  }\n\n  if ( MapBrowserEvent ) MapBrowserPointerEvent.__proto__ = MapBrowserEvent;\n  MapBrowserPointerEvent.prototype = Object.create( MapBrowserEvent && MapBrowserEvent.prototype );\n  MapBrowserPointerEvent.prototype.constructor = MapBrowserPointerEvent;\n\n  return MapBrowserPointerEvent;\n}(MapBrowserEvent));\n\nexport default MapBrowserPointerEvent;\n\n//# sourceMappingURL=MapBrowserPointerEvent.js.map","/**\n * @module ol/pointer/EventType\n */\n\n/**\n * Constants for event names.\n * @enum {string}\n */\nexport default {\n  POINTERMOVE: 'pointermove',\n  POINTERDOWN: 'pointerdown',\n  POINTERUP: 'pointerup',\n  POINTEROVER: 'pointerover',\n  POINTEROUT: 'pointerout',\n  POINTERENTER: 'pointerenter',\n  POINTERLEAVE: 'pointerleave',\n  POINTERCANCEL: 'pointercancel'\n};\n\n//# sourceMappingURL=EventType.js.map","/**\n * @module ol/pointer/EventSource\n */\n\nvar EventSource = function EventSource(dispatcher, mapping) {\n\n  /**\n   * @type {import(\"./PointerEventHandler.js\").default}\n   */\n  this.dispatcher = dispatcher;\n\n  /**\n   * @private\n   * @const\n   * @type {!Object<string, function(Event)>}\n   */\n  this.mapping_ = mapping;\n};\n\n/**\n * List of events supported by this source.\n * @return {Array<string>} Event names\n */\nEventSource.prototype.getEvents = function getEvents () {\n  return Object.keys(this.mapping_);\n};\n\n/**\n * Returns the handler that should handle a given event type.\n * @param {string} eventType The event type.\n * @return {function(Event)} Handler\n */\nEventSource.prototype.getHandlerForEvent = function getHandlerForEvent (eventType) {\n  return this.mapping_[eventType];\n};\n\nexport default EventSource;\n\n//# sourceMappingURL=EventSource.js.map","/**\n * @module ol/pointer/MouseSource\n */\n\n// Based on https://github.com/Polymer/PointerEvents\n\n// Copyright (c) 2013 The Polymer Authors. All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are\n// met:\n//\n// * Redistributions of source code must retain the above copyright\n// notice, this list of conditions and the following disclaimer.\n// * Redistributions in binary form must reproduce the above\n// copyright notice, this list of conditions and the following disclaimer\n// in the documentation and/or other materials provided with the\n// distribution.\n// * Neither the name of Google Inc. nor the names of its\n// contributors may be used to endorse or promote products derived from\n// this software without specific prior written permission.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n\nimport EventSource from './EventSource.js';\n\n\n/**\n * @type {number}\n */\nexport var POINTER_ID = 1;\n\n\n/**\n * @type {string}\n */\nexport var POINTER_TYPE = 'mouse';\n\n\n/**\n * Radius around touchend that swallows mouse events.\n *\n * @type {number}\n */\nvar DEDUP_DIST = 25;\n\n/**\n * Handler for `mousedown`.\n *\n * @this {MouseSource}\n * @param {MouseEvent} inEvent The in event.\n */\nfunction mousedown(inEvent) {\n  if (!this.isEventSimulatedFromTouch_(inEvent)) {\n    // TODO(dfreedman) workaround for some elements not sending mouseup\n    // http://crbug/149091\n    if (POINTER_ID.toString() in this.pointerMap) {\n      this.cancel(inEvent);\n    }\n    var e = prepareEvent(inEvent, this.dispatcher);\n    this.pointerMap[POINTER_ID.toString()] = inEvent;\n    this.dispatcher.down(e, inEvent);\n  }\n}\n\n/**\n * Handler for `mousemove`.\n *\n * @this {MouseSource}\n * @param {MouseEvent} inEvent The in event.\n */\nfunction mousemove(inEvent) {\n  if (!this.isEventSimulatedFromTouch_(inEvent)) {\n    var e = prepareEvent(inEvent, this.dispatcher);\n    this.dispatcher.move(e, inEvent);\n  }\n}\n\n/**\n * Handler for `mouseup`.\n *\n * @this {MouseSource}\n * @param {MouseEvent} inEvent The in event.\n */\nfunction mouseup(inEvent) {\n  if (!this.isEventSimulatedFromTouch_(inEvent)) {\n    var p = this.pointerMap[POINTER_ID.toString()];\n\n    if (p && p.button === inEvent.button) {\n      var e = prepareEvent(inEvent, this.dispatcher);\n      this.dispatcher.up(e, inEvent);\n      this.cleanupMouse();\n    }\n  }\n}\n\n/**\n * Handler for `mouseover`.\n *\n * @this {MouseSource}\n * @param {MouseEvent} inEvent The in event.\n */\nfunction mouseover(inEvent) {\n  if (!this.isEventSimulatedFromTouch_(inEvent)) {\n    var e = prepareEvent(inEvent, this.dispatcher);\n    this.dispatcher.enterOver(e, inEvent);\n  }\n}\n\n/**\n * Handler for `mouseout`.\n *\n * @this {MouseSource}\n * @param {MouseEvent} inEvent The in event.\n */\nfunction mouseout(inEvent) {\n  if (!this.isEventSimulatedFromTouch_(inEvent)) {\n    var e = prepareEvent(inEvent, this.dispatcher);\n    this.dispatcher.leaveOut(e, inEvent);\n  }\n}\n\n\nvar MouseSource = /*@__PURE__*/(function (EventSource) {\n  function MouseSource(dispatcher) {\n    var mapping = {\n      'mousedown': mousedown,\n      'mousemove': mousemove,\n      'mouseup': mouseup,\n      'mouseover': mouseover,\n      'mouseout': mouseout\n    };\n    EventSource.call(this, dispatcher, mapping);\n\n    /**\n     * @const\n     * @type {!Object<string, Event|Object>}\n     */\n    this.pointerMap = dispatcher.pointerMap;\n\n    /**\n     * @const\n     * @type {Array<import(\"../pixel.js\").Pixel>}\n     */\n    this.lastTouches = [];\n  }\n\n  if ( EventSource ) MouseSource.__proto__ = EventSource;\n  MouseSource.prototype = Object.create( EventSource && EventSource.prototype );\n  MouseSource.prototype.constructor = MouseSource;\n\n  /**\n   * Detect if a mouse event was simulated from a touch by\n   * checking if previously there was a touch event at the\n   * same position.\n   *\n   * FIXME - Known problem with the native Android browser on\n   * Samsung GT-I9100 (Android 4.1.2):\n   * In case the page is scrolled, this function does not work\n   * correctly when a canvas is used (WebGL or canvas renderer).\n   * Mouse listeners on canvas elements (for this browser), create\n   * two mouse events: One 'good' and one 'bad' one (on other browsers or\n   * when a div is used, there is only one event). For the 'bad' one,\n   * clientX/clientY and also pageX/pageY are wrong when the page\n   * is scrolled. Because of that, this function can not detect if\n   * the events were simulated from a touch event. As result, a\n   * pointer event at a wrong position is dispatched, which confuses\n   * the map interactions.\n   * It is unclear, how one can get the correct position for the event\n   * or detect that the positions are invalid.\n   *\n   * @private\n   * @param {MouseEvent} inEvent The in event.\n   * @return {boolean} True, if the event was generated by a touch.\n   */\n  MouseSource.prototype.isEventSimulatedFromTouch_ = function isEventSimulatedFromTouch_ (inEvent) {\n    var lts = this.lastTouches;\n    var x = inEvent.clientX;\n    var y = inEvent.clientY;\n    for (var i = 0, l = lts.length, t = (void 0); i < l && (t = lts[i]); i++) {\n      // simulated mouse events will be swallowed near a primary touchend\n      var dx = Math.abs(x - t[0]);\n      var dy = Math.abs(y - t[1]);\n      if (dx <= DEDUP_DIST && dy <= DEDUP_DIST) {\n        return true;\n      }\n    }\n    return false;\n  };\n\n  /**\n   * Dispatches a `pointercancel` event.\n   *\n   * @param {Event} inEvent The in event.\n   */\n  MouseSource.prototype.cancel = function cancel (inEvent) {\n    var e = prepareEvent(inEvent, this.dispatcher);\n    this.dispatcher.cancel(e, inEvent);\n    this.cleanupMouse();\n  };\n\n  /**\n   * Remove the mouse from the list of active pointers.\n   */\n  MouseSource.prototype.cleanupMouse = function cleanupMouse () {\n    delete this.pointerMap[POINTER_ID.toString()];\n  };\n\n  return MouseSource;\n}(EventSource));\n\n\n/**\n * Creates a copy of the original event that will be used\n * for the fake pointer event.\n *\n * @param {Event} inEvent The in event.\n * @param {import(\"./PointerEventHandler.js\").default} dispatcher Event handler.\n * @return {Object} The copied event.\n */\nexport function prepareEvent(inEvent, dispatcher) {\n  var e = dispatcher.cloneEvent(inEvent, inEvent);\n\n  // forward mouse preventDefault\n  var pd = e.preventDefault;\n  e.preventDefault = function() {\n    inEvent.preventDefault();\n    pd();\n  };\n\n  e.pointerId = POINTER_ID;\n  e.isPrimary = true;\n  e.pointerType = POINTER_TYPE;\n\n  return e;\n}\n\n\nexport default MouseSource;\n\n//# sourceMappingURL=MouseSource.js.map","/**\n * @module ol/pointer/MsSource\n */\n// Based on https://github.com/Polymer/PointerEvents\n\n// Copyright (c) 2013 The Polymer Authors. All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are\n// met:\n//\n// * Redistributions of source code must retain the above copyright\n// notice, this list of conditions and the following disclaimer.\n// * Redistributions in binary form must reproduce the above\n// copyright notice, this list of conditions and the following disclaimer\n// in the documentation and/or other materials provided with the\n// distribution.\n// * Neither the name of Google Inc. nor the names of its\n// contributors may be used to endorse or promote products derived from\n// this software without specific prior written permission.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n\nimport EventSource from './EventSource.js';\n\n\n/**\n * @const\n * @type {Array<string>}\n */\nvar POINTER_TYPES = [\n  '',\n  'unavailable',\n  'touch',\n  'pen',\n  'mouse'\n];\n\n/**\n * Handler for `msPointerDown`.\n *\n * @this {MsSource}\n * @param {MSPointerEvent} inEvent The in event.\n */\nfunction msPointerDown(inEvent) {\n  this.pointerMap[inEvent.pointerId.toString()] = inEvent;\n  var e = this.prepareEvent_(inEvent);\n  this.dispatcher.down(e, inEvent);\n}\n\n/**\n * Handler for `msPointerMove`.\n *\n * @this {MsSource}\n * @param {MSPointerEvent} inEvent The in event.\n */\nfunction msPointerMove(inEvent) {\n  var e = this.prepareEvent_(inEvent);\n  this.dispatcher.move(e, inEvent);\n}\n\n/**\n * Handler for `msPointerUp`.\n *\n * @this {MsSource}\n * @param {MSPointerEvent} inEvent The in event.\n */\nfunction msPointerUp(inEvent) {\n  var e = this.prepareEvent_(inEvent);\n  this.dispatcher.up(e, inEvent);\n  this.cleanup(inEvent.pointerId);\n}\n\n/**\n * Handler for `msPointerOut`.\n *\n * @this {MsSource}\n * @param {MSPointerEvent} inEvent The in event.\n */\nfunction msPointerOut(inEvent) {\n  var e = this.prepareEvent_(inEvent);\n  this.dispatcher.leaveOut(e, inEvent);\n}\n\n/**\n * Handler for `msPointerOver`.\n *\n * @this {MsSource}\n * @param {MSPointerEvent} inEvent The in event.\n */\nfunction msPointerOver(inEvent) {\n  var e = this.prepareEvent_(inEvent);\n  this.dispatcher.enterOver(e, inEvent);\n}\n\n/**\n * Handler for `msPointerCancel`.\n *\n * @this {MsSource}\n * @param {MSPointerEvent} inEvent The in event.\n */\nfunction msPointerCancel(inEvent) {\n  var e = this.prepareEvent_(inEvent);\n  this.dispatcher.cancel(e, inEvent);\n  this.cleanup(inEvent.pointerId);\n}\n\n/**\n * Handler for `msLostPointerCapture`.\n *\n * @this {MsSource}\n * @param {MSPointerEvent} inEvent The in event.\n */\nfunction msLostPointerCapture(inEvent) {\n  var e = this.dispatcher.makeEvent('lostpointercapture', inEvent, inEvent);\n  this.dispatcher.dispatchEvent(e);\n}\n\n/**\n * Handler for `msGotPointerCapture`.\n *\n * @this {MsSource}\n * @param {MSPointerEvent} inEvent The in event.\n */\nfunction msGotPointerCapture(inEvent) {\n  var e = this.dispatcher.makeEvent('gotpointercapture', inEvent, inEvent);\n  this.dispatcher.dispatchEvent(e);\n}\n\nvar MsSource = /*@__PURE__*/(function (EventSource) {\n  function MsSource(dispatcher) {\n    var mapping = {\n      'MSPointerDown': msPointerDown,\n      'MSPointerMove': msPointerMove,\n      'MSPointerUp': msPointerUp,\n      'MSPointerOut': msPointerOut,\n      'MSPointerOver': msPointerOver,\n      'MSPointerCancel': msPointerCancel,\n      'MSGotPointerCapture': msGotPointerCapture,\n      'MSLostPointerCapture': msLostPointerCapture\n    };\n    EventSource.call(this, dispatcher, mapping);\n\n    /**\n     * @const\n     * @type {!Object<string, MSPointerEvent|Object>}\n     */\n    this.pointerMap = dispatcher.pointerMap;\n  }\n\n  if ( EventSource ) MsSource.__proto__ = EventSource;\n  MsSource.prototype = Object.create( EventSource && EventSource.prototype );\n  MsSource.prototype.constructor = MsSource;\n\n  /**\n   * Creates a copy of the original event that will be used\n   * for the fake pointer event.\n   *\n   * @private\n   * @param {MSPointerEvent} inEvent The in event.\n   * @return {Object} The copied event.\n   */\n  MsSource.prototype.prepareEvent_ = function prepareEvent_ (inEvent) {\n    /** @type {MSPointerEvent|Object} */\n    var e = inEvent;\n    if (typeof inEvent.pointerType === 'number') {\n      e = this.dispatcher.cloneEvent(inEvent, inEvent);\n      e.pointerType = POINTER_TYPES[inEvent.pointerType];\n    }\n\n    return e;\n  };\n\n  /**\n   * Remove this pointer from the list of active pointers.\n   * @param {number} pointerId Pointer identifier.\n   */\n  MsSource.prototype.cleanup = function cleanup (pointerId) {\n    delete this.pointerMap[pointerId.toString()];\n  };\n\n  return MsSource;\n}(EventSource));\n\nexport default MsSource;\n\n//# sourceMappingURL=MsSource.js.map","/**\n * @module ol/pointer/NativeSource\n */\n\n// Based on https://github.com/Polymer/PointerEvents\n\n// Copyright (c) 2013 The Polymer Authors. All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are\n// met:\n//\n// * Redistributions of source code must retain the above copyright\n// notice, this list of conditions and the following disclaimer.\n// * Redistributions in binary form must reproduce the above\n// copyright notice, this list of conditions and the following disclaimer\n// in the documentation and/or other materials provided with the\n// distribution.\n// * Neither the name of Google Inc. nor the names of its\n// contributors may be used to endorse or promote products derived from\n// this software without specific prior written permission.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n\nimport EventSource from './EventSource.js';\n\n/**\n * Handler for `pointerdown`.\n *\n * @this {NativeSource}\n * @param {Event} inEvent The in event.\n */\nfunction pointerDown(inEvent) {\n  this.dispatcher.fireNativeEvent(inEvent);\n}\n\n/**\n * Handler for `pointermove`.\n *\n * @this {NativeSource}\n * @param {Event} inEvent The in event.\n */\nfunction pointerMove(inEvent) {\n  this.dispatcher.fireNativeEvent(inEvent);\n}\n\n/**\n * Handler for `pointerup`.\n *\n * @this {NativeSource}\n * @param {Event} inEvent The in event.\n */\nfunction pointerUp(inEvent) {\n  this.dispatcher.fireNativeEvent(inEvent);\n}\n\n/**\n * Handler for `pointerout`.\n *\n * @this {NativeSource}\n * @param {Event} inEvent The in event.\n */\nfunction pointerOut(inEvent) {\n  this.dispatcher.fireNativeEvent(inEvent);\n}\n\n/**\n * Handler for `pointerover`.\n *\n * @this {NativeSource}\n * @param {Event} inEvent The in event.\n */\nfunction pointerOver(inEvent) {\n  this.dispatcher.fireNativeEvent(inEvent);\n}\n\n/**\n * Handler for `pointercancel`.\n *\n * @this {NativeSource}\n * @param {Event} inEvent The in event.\n */\nfunction pointerCancel(inEvent) {\n  this.dispatcher.fireNativeEvent(inEvent);\n}\n\n/**\n * Handler for `lostpointercapture`.\n *\n * @this {NativeSource}\n * @param {Event} inEvent The in event.\n */\nfunction lostPointerCapture(inEvent) {\n  this.dispatcher.fireNativeEvent(inEvent);\n}\n\n/**\n * Handler for `gotpointercapture`.\n *\n * @this {NativeSource}\n * @param {Event} inEvent The in event.\n */\nfunction gotPointerCapture(inEvent) {\n  this.dispatcher.fireNativeEvent(inEvent);\n}\n\nvar NativeSource = /*@__PURE__*/(function (EventSource) {\n  function NativeSource(dispatcher) {\n    var mapping = {\n      'pointerdown': pointerDown,\n      'pointermove': pointerMove,\n      'pointerup': pointerUp,\n      'pointerout': pointerOut,\n      'pointerover': pointerOver,\n      'pointercancel': pointerCancel,\n      'gotpointercapture': gotPointerCapture,\n      'lostpointercapture': lostPointerCapture\n    };\n    EventSource.call(this, dispatcher, mapping);\n  }\n\n  if ( EventSource ) NativeSource.__proto__ = EventSource;\n  NativeSource.prototype = Object.create( EventSource && EventSource.prototype );\n  NativeSource.prototype.constructor = NativeSource;\n\n  return NativeSource;\n}(EventSource));\n\nexport default NativeSource;\n\n//# sourceMappingURL=NativeSource.js.map","/**\n * @module ol/pointer/PointerEvent\n */\n\n// Based on https://github.com/Polymer/PointerEvents\n\n// Copyright (c) 2013 The Polymer Authors. All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are\n// met:\n//\n// * Redistributions of source code must retain the above copyright\n// notice, this list of conditions and the following disclaimer.\n// * Redistributions in binary form must reproduce the above\n// copyright notice, this list of conditions and the following disclaimer\n// in the documentation and/or other materials provided with the\n// distribution.\n// * Neither the name of Google Inc. nor the names of its\n// contributors may be used to endorse or promote products derived from\n// this software without specific prior written permission.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n\nimport _Event from '../events/Event.js';\n\n\n/**\n * Is the `buttons` property supported?\n * @type {boolean}\n */\nvar HAS_BUTTONS = false;\n\n\nvar PointerEvent = /*@__PURE__*/(function (_Event) {\n  function PointerEvent(type, originalEvent, opt_eventDict) {\n    _Event.call(this, type);\n\n    /**\n     * @const\n     * @type {Event}\n     */\n    this.originalEvent = originalEvent;\n\n    var eventDict = opt_eventDict ? opt_eventDict : {};\n\n    /**\n     * @type {number}\n     */\n    this.buttons = getButtons(eventDict);\n\n    /**\n     * @type {number}\n     */\n    this.pressure = getPressure(eventDict, this.buttons);\n\n    // MouseEvent related properties\n\n    /**\n     * @type {boolean}\n     */\n    this.bubbles = 'bubbles' in eventDict ? eventDict['bubbles'] : false;\n\n    /**\n     * @type {boolean}\n     */\n    this.cancelable = 'cancelable' in eventDict ? eventDict['cancelable'] : false;\n\n    /**\n     * @type {Object}\n     */\n    this.view = 'view' in eventDict ? eventDict['view'] : null;\n\n    /**\n     * @type {number}\n     */\n    this.detail = 'detail' in eventDict ? eventDict['detail'] : null;\n\n    /**\n     * @type {number}\n     */\n    this.screenX = 'screenX' in eventDict ? eventDict['screenX'] : 0;\n\n    /**\n     * @type {number}\n     */\n    this.screenY = 'screenY' in eventDict ? eventDict['screenY'] : 0;\n\n    /**\n     * @type {number}\n     */\n    this.clientX = 'clientX' in eventDict ? eventDict['clientX'] : 0;\n\n    /**\n     * @type {number}\n     */\n    this.clientY = 'clientY' in eventDict ? eventDict['clientY'] : 0;\n\n    /**\n     * @type {boolean}\n     */\n    this.ctrlKey = 'ctrlKey' in eventDict ? eventDict['ctrlKey'] : false;\n\n    /**\n     * @type {boolean}\n     */\n    this.altKey = 'altKey' in eventDict ? eventDict['altKey'] : false;\n\n    /**\n     * @type {boolean}\n     */\n    this.shiftKey = 'shiftKey' in eventDict ? eventDict['shiftKey'] : false;\n\n    /**\n     * @type {boolean}\n     */\n    this.metaKey = 'metaKey' in eventDict ? eventDict['metaKey'] : false;\n\n    /**\n     * @type {number}\n     */\n    this.button = 'button' in eventDict ? eventDict['button'] : 0;\n\n    /**\n     * @type {Node}\n     */\n    this.relatedTarget = 'relatedTarget' in eventDict ?\n      eventDict['relatedTarget'] : null;\n\n    // PointerEvent related properties\n\n    /**\n     * @const\n     * @type {number}\n     */\n    this.pointerId = 'pointerId' in eventDict ? eventDict['pointerId'] : 0;\n\n    /**\n     * @type {number}\n     */\n    this.width = 'width' in eventDict ? eventDict['width'] : 0;\n\n    /**\n     * @type {number}\n     */\n    this.height = 'height' in eventDict ? eventDict['height'] : 0;\n\n    /**\n     * @type {number}\n     */\n    this.tiltX = 'tiltX' in eventDict ? eventDict['tiltX'] : 0;\n\n    /**\n     * @type {number}\n     */\n    this.tiltY = 'tiltY' in eventDict ? eventDict['tiltY'] : 0;\n\n    /**\n     * @type {string}\n     */\n    this.pointerType = 'pointerType' in eventDict ? eventDict['pointerType'] : '';\n\n    /**\n     * @type {number}\n     */\n    this.hwTimestamp = 'hwTimestamp' in eventDict ? eventDict['hwTimestamp'] : 0;\n\n    /**\n     * @type {boolean}\n     */\n    this.isPrimary = 'isPrimary' in eventDict ? eventDict['isPrimary'] : false;\n\n    // keep the semantics of preventDefault\n    if (originalEvent.preventDefault) {\n      this.preventDefault = function() {\n        originalEvent.preventDefault();\n      };\n    }\n  }\n\n  if ( _Event ) PointerEvent.__proto__ = _Event;\n  PointerEvent.prototype = Object.create( _Event && _Event.prototype );\n  PointerEvent.prototype.constructor = PointerEvent;\n\n  return PointerEvent;\n}(_Event));\n\n\n/**\n * @param {Object<string, ?>} eventDict The event dictionary.\n * @return {number} Button indicator.\n */\nfunction getButtons(eventDict) {\n  // According to the w3c spec,\n  // http://www.w3.org/TR/DOM-Level-3-Events/#events-MouseEvent-button\n  // MouseEvent.button == 0 can mean either no mouse button depressed, or the\n  // left mouse button depressed.\n  //\n  // As of now, the only way to distinguish between the two states of\n  // MouseEvent.button is by using the deprecated MouseEvent.which property, as\n  // this maps mouse buttons to positive integers > 0, and uses 0 to mean that\n  // no mouse button is held.\n  //\n  // MouseEvent.which is derived from MouseEvent.button at MouseEvent creation,\n  // but initMouseEvent does not expose an argument with which to set\n  // MouseEvent.which. Calling initMouseEvent with a buttonArg of 0 will set\n  // MouseEvent.button == 0 and MouseEvent.which == 1, breaking the expectations\n  // of app developers.\n  //\n  // The only way to propagate the correct state of MouseEvent.which and\n  // MouseEvent.button to a new MouseEvent.button == 0 and MouseEvent.which == 0\n  // is to call initMouseEvent with a buttonArg value of -1.\n  //\n  // This is fixed with DOM Level 4's use of buttons\n  var buttons;\n  if (eventDict.buttons || HAS_BUTTONS) {\n    buttons = eventDict.buttons;\n  } else {\n    switch (eventDict.which) {\n      case 1: buttons = 1; break;\n      case 2: buttons = 4; break;\n      case 3: buttons = 2; break;\n      default: buttons = 0;\n    }\n  }\n  return buttons;\n}\n\n\n/**\n * @param {Object<string, ?>} eventDict The event dictionary.\n * @param {number} buttons Button indicator.\n * @return {number} The pressure.\n */\nfunction getPressure(eventDict, buttons) {\n  // Spec requires that pointers without pressure specified use 0.5 for down\n  // state and 0 for up state.\n  var pressure = 0;\n  if (eventDict.pressure) {\n    pressure = eventDict.pressure;\n  } else {\n    pressure = buttons ? 0.5 : 0;\n  }\n  return pressure;\n}\n\n\n/**\n * Checks if the `buttons` property is supported.\n */\n(function() {\n  try {\n    var ev = new MouseEvent('click', {buttons: 1});\n    HAS_BUTTONS = ev.buttons === 1;\n  } catch (e) {\n    // pass\n  }\n})();\n\nexport default PointerEvent;\n\n//# sourceMappingURL=PointerEvent.js.map","/**\n * @module ol/array\n */\n\n\n/**\n * Performs a binary search on the provided sorted list and returns the index of the item if found. If it can't be found it'll return -1.\n * https://github.com/darkskyapp/binary-search\n *\n * @param {Array<*>} haystack Items to search through.\n * @param {*} needle The item to look for.\n * @param {Function=} opt_comparator Comparator function.\n * @return {number} The index of the item if found, -1 if not.\n */\nexport function binarySearch(haystack, needle, opt_comparator) {\n  var mid, cmp;\n  var comparator = opt_comparator || numberSafeCompareFunction;\n  var low = 0;\n  var high = haystack.length;\n  var found = false;\n\n  while (low < high) {\n    /* Note that \"(low + high) >>> 1\" may overflow, and results in a typecast\n     * to double (which gives the wrong results). */\n    mid = low + (high - low >> 1);\n    cmp = +comparator(haystack[mid], needle);\n\n    if (cmp < 0.0) { /* Too low. */\n      low = mid + 1;\n\n    } else { /* Key found or too high */\n      high = mid;\n      found = !cmp;\n    }\n  }\n\n  /* Key not found. */\n  return found ? low : ~low;\n}\n\n\n/**\n * Compare function for array sort that is safe for numbers.\n * @param {*} a The first object to be compared.\n * @param {*} b The second object to be compared.\n * @return {number} A negative number, zero, or a positive number as the first\n *     argument is less than, equal to, or greater than the second.\n */\nexport function numberSafeCompareFunction(a, b) {\n  return a > b ? 1 : a < b ? -1 : 0;\n}\n\n\n/**\n * Whether the array contains the given object.\n * @param {Array<*>} arr The array to test for the presence of the element.\n * @param {*} obj The object for which to test.\n * @return {boolean} The object is in the array.\n */\nexport function includes(arr, obj) {\n  return arr.indexOf(obj) >= 0;\n}\n\n\n/**\n * @param {Array<number>} arr Array.\n * @param {number} target Target.\n * @param {number} direction 0 means return the nearest, > 0\n *    means return the largest nearest, < 0 means return the\n *    smallest nearest.\n * @return {number} Index.\n */\nexport function linearFindNearest(arr, target, direction) {\n  var n = arr.length;\n  if (arr[0] <= target) {\n    return 0;\n  } else if (target <= arr[n - 1]) {\n    return n - 1;\n  } else {\n    var i;\n    if (direction > 0) {\n      for (i = 1; i < n; ++i) {\n        if (arr[i] < target) {\n          return i - 1;\n        }\n      }\n    } else if (direction < 0) {\n      for (i = 1; i < n; ++i) {\n        if (arr[i] <= target) {\n          return i;\n        }\n      }\n    } else {\n      for (i = 1; i < n; ++i) {\n        if (arr[i] == target) {\n          return i;\n        } else if (arr[i] < target) {\n          if (arr[i - 1] - target < target - arr[i]) {\n            return i - 1;\n          } else {\n            return i;\n          }\n        }\n      }\n    }\n    return n - 1;\n  }\n}\n\n\n/**\n * @param {Array<*>} arr Array.\n * @param {number} begin Begin index.\n * @param {number} end End index.\n */\nexport function reverseSubArray(arr, begin, end) {\n  while (begin < end) {\n    var tmp = arr[begin];\n    arr[begin] = arr[end];\n    arr[end] = tmp;\n    ++begin;\n    --end;\n  }\n}\n\n\n/**\n * @param {Array<VALUE>} arr The array to modify.\n * @param {!Array<VALUE>|VALUE} data The elements or arrays of elements to add to arr.\n * @template VALUE\n */\nexport function extend(arr, data) {\n  var extension = Array.isArray(data) ? data : [data];\n  var length = extension.length;\n  for (var i = 0; i < length; i++) {\n    arr[arr.length] = extension[i];\n  }\n}\n\n\n/**\n * @param {Array<VALUE>} arr The array to modify.\n * @param {VALUE} obj The element to remove.\n * @template VALUE\n * @return {boolean} If the element was removed.\n */\nexport function remove(arr, obj) {\n  var i = arr.indexOf(obj);\n  var found = i > -1;\n  if (found) {\n    arr.splice(i, 1);\n  }\n  return found;\n}\n\n\n/**\n * @param {Array<VALUE>} arr The array to search in.\n * @param {function(VALUE, number, ?) : boolean} func The function to compare.\n * @template VALUE\n * @return {VALUE|null} The element found or null.\n */\nexport function find(arr, func) {\n  var length = arr.length >>> 0;\n  var value;\n\n  for (var i = 0; i < length; i++) {\n    value = arr[i];\n    if (func(value, i, arr)) {\n      return value;\n    }\n  }\n  return null;\n}\n\n\n/**\n * @param {Array|Uint8ClampedArray} arr1 The first array to compare.\n * @param {Array|Uint8ClampedArray} arr2 The second array to compare.\n * @return {boolean} Whether the two arrays are equal.\n */\nexport function equals(arr1, arr2) {\n  var len1 = arr1.length;\n  if (len1 !== arr2.length) {\n    return false;\n  }\n  for (var i = 0; i < len1; i++) {\n    if (arr1[i] !== arr2[i]) {\n      return false;\n    }\n  }\n  return true;\n}\n\n\n/**\n * Sort the passed array such that the relative order of equal elements is preverved.\n * See https://en.wikipedia.org/wiki/Sorting_algorithm#Stability for details.\n * @param {Array<*>} arr The array to sort (modifies original).\n * @param {!function(*, *): number} compareFnc Comparison function.\n * @api\n */\nexport function stableSort(arr, compareFnc) {\n  var length = arr.length;\n  var tmp = Array(arr.length);\n  var i;\n  for (i = 0; i < length; i++) {\n    tmp[i] = {index: i, value: arr[i]};\n  }\n  tmp.sort(function(a, b) {\n    return compareFnc(a.value, b.value) || a.index - b.index;\n  });\n  for (i = 0; i < arr.length; i++) {\n    arr[i] = tmp[i].value;\n  }\n}\n\n\n/**\n * @param {Array<*>} arr The array to search in.\n * @param {Function} func Comparison function.\n * @return {number} Return index.\n */\nexport function findIndex(arr, func) {\n  var index;\n  var found = !arr.every(function(el, idx) {\n    index = idx;\n    return !func(el, idx, arr);\n  });\n  return found ? index : -1;\n}\n\n\n/**\n * @param {Array<*>} arr The array to test.\n * @param {Function=} opt_func Comparison function.\n * @param {boolean=} opt_strict Strictly sorted (default false).\n * @return {boolean} Return index.\n */\nexport function isSorted(arr, opt_func, opt_strict) {\n  var compare = opt_func || numberSafeCompareFunction;\n  return arr.every(function(currentVal, index) {\n    if (index === 0) {\n      return true;\n    }\n    var res = compare(arr[index - 1], currentVal);\n    return !(res > 0 || opt_strict && res === 0);\n  });\n}\n\n//# sourceMappingURL=array.js.map","/**\n * @module ol/pointer/TouchSource\n */\n\n// Based on https://github.com/Polymer/PointerEvents\n\n// Copyright (c) 2013 The Polymer Authors. All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are\n// met:\n//\n// * Redistributions of source code must retain the above copyright\n// notice, this list of conditions and the following disclaimer.\n// * Redistributions in binary form must reproduce the above\n// copyright notice, this list of conditions and the following disclaimer\n// in the documentation and/or other materials provided with the\n// distribution.\n// * Neither the name of Google Inc. nor the names of its\n// contributors may be used to endorse or promote products derived from\n// this software without specific prior written permission.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n\nimport {remove} from '../array.js';\nimport EventSource from './EventSource.js';\nimport {POINTER_ID} from './MouseSource.js';\n\n\n/**\n * @type {number}\n */\nvar CLICK_COUNT_TIMEOUT = 200;\n\n/**\n * @type {string}\n */\nvar POINTER_TYPE = 'touch';\n\n/**\n * Handler for `touchstart`, triggers `pointerover`,\n * `pointerenter` and `pointerdown` events.\n *\n * @this {TouchSource}\n * @param {TouchEvent} inEvent The in event.\n */\nfunction touchstart(inEvent) {\n  this.vacuumTouches_(inEvent);\n  this.setPrimaryTouch_(inEvent.changedTouches[0]);\n  this.dedupSynthMouse_(inEvent);\n  this.clickCount_++;\n  this.processTouches_(inEvent, this.overDown_);\n}\n\n/**\n * Handler for `touchmove`.\n *\n * @this {TouchSource}\n * @param {TouchEvent} inEvent The in event.\n */\nfunction touchmove(inEvent) {\n  this.processTouches_(inEvent, this.moveOverOut_);\n}\n\n/**\n * Handler for `touchend`, triggers `pointerup`,\n * `pointerout` and `pointerleave` events.\n *\n * @this {TouchSource}\n * @param {TouchEvent} inEvent The event.\n */\nfunction touchend(inEvent) {\n  this.dedupSynthMouse_(inEvent);\n  this.processTouches_(inEvent, this.upOut_);\n}\n\n/**\n * Handler for `touchcancel`, triggers `pointercancel`,\n * `pointerout` and `pointerleave` events.\n *\n * @this {TouchSource}\n * @param {TouchEvent} inEvent The in event.\n */\nfunction touchcancel(inEvent) {\n  this.processTouches_(inEvent, this.cancelOut_);\n}\n\n\nvar TouchSource = /*@__PURE__*/(function (EventSource) {\n  function TouchSource(dispatcher, mouseSource) {\n    var mapping = {\n      'touchstart': touchstart,\n      'touchmove': touchmove,\n      'touchend': touchend,\n      'touchcancel': touchcancel\n    };\n    EventSource.call(this, dispatcher, mapping);\n\n    /**\n     * @const\n     * @type {!Object<string, Event|Object>}\n     */\n    this.pointerMap = dispatcher.pointerMap;\n\n    /**\n     * @const\n     * @type {import(\"./MouseSource.js\").default}\n     */\n    this.mouseSource = mouseSource;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.firstTouchId_ = undefined;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.clickCount_ = 0;\n\n    /**\n     * @private\n     * @type {?}\n     */\n    this.resetId_;\n\n    /**\n     * Mouse event timeout: This should be long enough to\n     * ignore compat mouse events made by touch.\n     * @private\n     * @type {number}\n     */\n    this.dedupTimeout_ = 2500;\n  }\n\n  if ( EventSource ) TouchSource.__proto__ = EventSource;\n  TouchSource.prototype = Object.create( EventSource && EventSource.prototype );\n  TouchSource.prototype.constructor = TouchSource;\n\n  /**\n   * @private\n   * @param {Touch} inTouch The in touch.\n   * @return {boolean} True, if this is the primary touch.\n   */\n  TouchSource.prototype.isPrimaryTouch_ = function isPrimaryTouch_ (inTouch) {\n    return this.firstTouchId_ === inTouch.identifier;\n  };\n\n  /**\n   * Set primary touch if there are no pointers, or the only pointer is the mouse.\n   * @param {Touch} inTouch The in touch.\n   * @private\n   */\n  TouchSource.prototype.setPrimaryTouch_ = function setPrimaryTouch_ (inTouch) {\n    var count = Object.keys(this.pointerMap).length;\n    if (count === 0 || (count === 1 && POINTER_ID.toString() in this.pointerMap)) {\n      this.firstTouchId_ = inTouch.identifier;\n      this.cancelResetClickCount_();\n    }\n  };\n\n  /**\n   * @private\n   * @param {PointerEvent} inPointer The in pointer object.\n   */\n  TouchSource.prototype.removePrimaryPointer_ = function removePrimaryPointer_ (inPointer) {\n    if (inPointer.isPrimary) {\n      this.firstTouchId_ = undefined;\n      this.resetClickCount_();\n    }\n  };\n\n  /**\n   * @private\n   */\n  TouchSource.prototype.resetClickCount_ = function resetClickCount_ () {\n    this.resetId_ = setTimeout(\n      this.resetClickCountHandler_.bind(this),\n      CLICK_COUNT_TIMEOUT);\n  };\n\n  /**\n   * @private\n   */\n  TouchSource.prototype.resetClickCountHandler_ = function resetClickCountHandler_ () {\n    this.clickCount_ = 0;\n    this.resetId_ = undefined;\n  };\n\n  /**\n   * @private\n   */\n  TouchSource.prototype.cancelResetClickCount_ = function cancelResetClickCount_ () {\n    if (this.resetId_ !== undefined) {\n      clearTimeout(this.resetId_);\n    }\n  };\n\n  /**\n   * @private\n   * @param {TouchEvent} browserEvent Browser event\n   * @param {Touch} inTouch Touch event\n   * @return {PointerEvent} A pointer object.\n   */\n  TouchSource.prototype.touchToPointer_ = function touchToPointer_ (browserEvent, inTouch) {\n    var e = this.dispatcher.cloneEvent(browserEvent, inTouch);\n    // Spec specifies that pointerId 1 is reserved for Mouse.\n    // Touch identifiers can start at 0.\n    // Add 2 to the touch identifier for compatibility.\n    e.pointerId = inTouch.identifier + 2;\n    // TODO: check if this is necessary?\n    //e.target = findTarget(e);\n    e.bubbles = true;\n    e.cancelable = true;\n    e.detail = this.clickCount_;\n    e.button = 0;\n    e.buttons = 1;\n    e.width = inTouch.radiusX || 0;\n    e.height = inTouch.radiusY || 0;\n    e.pressure = inTouch.force || 0.5;\n    e.isPrimary = this.isPrimaryTouch_(inTouch);\n    e.pointerType = POINTER_TYPE;\n\n    // make sure that the properties that are different for\n    // each `Touch` object are not copied from the BrowserEvent object\n    e.clientX = inTouch.clientX;\n    e.clientY = inTouch.clientY;\n    e.screenX = inTouch.screenX;\n    e.screenY = inTouch.screenY;\n\n    return e;\n  };\n\n  /**\n   * @private\n   * @param {TouchEvent} inEvent Touch event\n   * @param {function(TouchEvent, PointerEvent)} inFunction In function.\n   */\n  TouchSource.prototype.processTouches_ = function processTouches_ (inEvent, inFunction) {\n    var touches = Array.prototype.slice.call(inEvent.changedTouches);\n    var count = touches.length;\n    function preventDefault() {\n      inEvent.preventDefault();\n    }\n    for (var i = 0; i < count; ++i) {\n      var pointer = this.touchToPointer_(inEvent, touches[i]);\n      // forward touch preventDefaults\n      pointer.preventDefault = preventDefault;\n      inFunction.call(this, inEvent, pointer);\n    }\n  };\n\n  /**\n   * @private\n   * @param {TouchList} touchList The touch list.\n   * @param {number} searchId Search identifier.\n   * @return {boolean} True, if the `Touch` with the given id is in the list.\n   */\n  TouchSource.prototype.findTouch_ = function findTouch_ (touchList, searchId) {\n    var l = touchList.length;\n    for (var i = 0; i < l; i++) {\n      var touch = touchList[i];\n      if (touch.identifier === searchId) {\n        return true;\n      }\n    }\n    return false;\n  };\n\n  /**\n   * In some instances, a touchstart can happen without a touchend. This\n   * leaves the pointermap in a broken state.\n   * Therefore, on every touchstart, we remove the touches that did not fire a\n   * touchend event.\n   * To keep state globally consistent, we fire a pointercancel for\n   * this \"abandoned\" touch\n   *\n   * @private\n   * @param {TouchEvent} inEvent The in event.\n   */\n  TouchSource.prototype.vacuumTouches_ = function vacuumTouches_ (inEvent) {\n    var touchList = inEvent.touches;\n    // pointerMap.getCount() should be < touchList.length here,\n    // as the touchstart has not been processed yet.\n    var keys = Object.keys(this.pointerMap);\n    var count = keys.length;\n    if (count >= touchList.length) {\n      var d = [];\n      for (var i = 0; i < count; ++i) {\n        var key = Number(keys[i]);\n        var value = this.pointerMap[key];\n        // Never remove pointerId == 1, which is mouse.\n        // Touch identifiers are 2 smaller than their pointerId, which is the\n        // index in pointermap.\n        if (key != POINTER_ID && !this.findTouch_(touchList, key - 2)) {\n          d.push(value.out);\n        }\n      }\n      for (var i$1 = 0; i$1 < d.length; ++i$1) {\n        this.cancelOut_(inEvent, d[i$1]);\n      }\n    }\n  };\n\n  /**\n   * @private\n   * @param {TouchEvent} browserEvent The event.\n   * @param {PointerEvent} inPointer The in pointer object.\n   */\n  TouchSource.prototype.overDown_ = function overDown_ (browserEvent, inPointer) {\n    this.pointerMap[inPointer.pointerId] = {\n      target: inPointer.target,\n      out: inPointer,\n      outTarget: inPointer.target\n    };\n    this.dispatcher.over(inPointer, browserEvent);\n    this.dispatcher.enter(inPointer, browserEvent);\n    this.dispatcher.down(inPointer, browserEvent);\n  };\n\n  /**\n   * @private\n   * @param {TouchEvent} browserEvent The event.\n   * @param {PointerEvent} inPointer The in pointer.\n   */\n  TouchSource.prototype.moveOverOut_ = function moveOverOut_ (browserEvent, inPointer) {\n    var event = inPointer;\n    var pointer = this.pointerMap[event.pointerId];\n    // a finger drifted off the screen, ignore it\n    if (!pointer) {\n      return;\n    }\n    var outEvent = pointer.out;\n    var outTarget = pointer.outTarget;\n    this.dispatcher.move(event, browserEvent);\n    if (outEvent && outTarget !== event.target) {\n      outEvent.relatedTarget = event.target;\n      /** @type {Object} */ (event).relatedTarget = outTarget;\n      // recover from retargeting by shadow\n      outEvent.target = outTarget;\n      if (event.target) {\n        this.dispatcher.leaveOut(outEvent, browserEvent);\n        this.dispatcher.enterOver(event, browserEvent);\n      } else {\n        // clean up case when finger leaves the screen\n        /** @type {Object} */ (event).target = outTarget;\n        /** @type {Object} */ (event).relatedTarget = null;\n        this.cancelOut_(browserEvent, event);\n      }\n    }\n    pointer.out = event;\n    pointer.outTarget = event.target;\n  };\n\n  /**\n   * @private\n   * @param {TouchEvent} browserEvent An event.\n   * @param {PointerEvent} inPointer The inPointer object.\n   */\n  TouchSource.prototype.upOut_ = function upOut_ (browserEvent, inPointer) {\n    this.dispatcher.up(inPointer, browserEvent);\n    this.dispatcher.out(inPointer, browserEvent);\n    this.dispatcher.leave(inPointer, browserEvent);\n    this.cleanUpPointer_(inPointer);\n  };\n\n  /**\n   * @private\n   * @param {TouchEvent} browserEvent The event.\n   * @param {PointerEvent} inPointer The in pointer.\n   */\n  TouchSource.prototype.cancelOut_ = function cancelOut_ (browserEvent, inPointer) {\n    this.dispatcher.cancel(inPointer, browserEvent);\n    this.dispatcher.out(inPointer, browserEvent);\n    this.dispatcher.leave(inPointer, browserEvent);\n    this.cleanUpPointer_(inPointer);\n  };\n\n  /**\n   * @private\n   * @param {PointerEvent} inPointer The inPointer object.\n   */\n  TouchSource.prototype.cleanUpPointer_ = function cleanUpPointer_ (inPointer) {\n    delete this.pointerMap[inPointer.pointerId];\n    this.removePrimaryPointer_(inPointer);\n  };\n\n  /**\n   * Prevent synth mouse events from creating pointer events.\n   *\n   * @private\n   * @param {TouchEvent} inEvent The in event.\n   */\n  TouchSource.prototype.dedupSynthMouse_ = function dedupSynthMouse_ (inEvent) {\n    var lts = this.mouseSource.lastTouches;\n    var t = inEvent.changedTouches[0];\n    // only the primary finger will synth mouse events\n    if (this.isPrimaryTouch_(t)) {\n      // remember x/y of last touch\n      var lt = [t.clientX, t.clientY];\n      lts.push(lt);\n\n      setTimeout(function() {\n        // remove touch after timeout\n        remove(lts, lt);\n      }, this.dedupTimeout_);\n    }\n  };\n\n  return TouchSource;\n}(EventSource));\n\nexport default TouchSource;\n\n//# sourceMappingURL=TouchSource.js.map","/**\n * @module ol/pointer/PointerEventHandler\n */\n\n// Based on https://github.com/Polymer/PointerEvents\n\n// Copyright (c) 2013 The Polymer Authors. All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are\n// met:\n//\n// * Redistributions of source code must retain the above copyright\n// notice, this list of conditions and the following disclaimer.\n// * Redistributions in binary form must reproduce the above\n// copyright notice, this list of conditions and the following disclaimer\n// in the documentation and/or other materials provided with the\n// distribution.\n// * Neither the name of Google Inc. nor the names of its\n// contributors may be used to endorse or promote products derived from\n// this software without specific prior written permission.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n\nimport {listen, unlisten} from '../events.js';\nimport EventTarget from '../events/Target.js';\nimport {POINTER, MSPOINTER, TOUCH} from '../has.js';\nimport PointerEventType from './EventType.js';\nimport MouseSource, {prepareEvent as prepareMouseEvent} from './MouseSource.js';\nimport MsSource from './MsSource.js';\nimport NativeSource from './NativeSource.js';\nimport PointerEvent from './PointerEvent.js';\nimport TouchSource from './TouchSource.js';\n\n\n/**\n * Properties to copy when cloning an event, with default values.\n * @type {Array<Array>}\n */\nvar CLONE_PROPS = [\n  // MouseEvent\n  ['bubbles', false],\n  ['cancelable', false],\n  ['view', null],\n  ['detail', null],\n  ['screenX', 0],\n  ['screenY', 0],\n  ['clientX', 0],\n  ['clientY', 0],\n  ['ctrlKey', false],\n  ['altKey', false],\n  ['shiftKey', false],\n  ['metaKey', false],\n  ['button', 0],\n  ['relatedTarget', null],\n  // DOM Level 3\n  ['buttons', 0],\n  // PointerEvent\n  ['pointerId', 0],\n  ['width', 0],\n  ['height', 0],\n  ['pressure', 0],\n  ['tiltX', 0],\n  ['tiltY', 0],\n  ['pointerType', ''],\n  ['hwTimestamp', 0],\n  ['isPrimary', false],\n  // event instance\n  ['type', ''],\n  ['target', null],\n  ['currentTarget', null],\n  ['which', 0]\n];\n\n\nvar PointerEventHandler = /*@__PURE__*/(function (EventTarget) {\n  function PointerEventHandler(element) {\n    EventTarget.call(this);\n\n    /**\n     * @const\n     * @private\n     * @type {Element|HTMLDocument}\n     */\n    this.element_ = element;\n\n    /**\n     * @const\n     * @type {!Object<string, Event|Object>}\n     */\n    this.pointerMap = {};\n\n    /**\n     * @type {Object<string, function(Event)>}\n     * @private\n     */\n    this.eventMap_ = {};\n\n    /**\n     * @type {Array<import(\"./EventSource.js\").default>}\n     * @private\n     */\n    this.eventSourceList_ = [];\n\n    this.registerSources();\n  }\n\n  if ( EventTarget ) PointerEventHandler.__proto__ = EventTarget;\n  PointerEventHandler.prototype = Object.create( EventTarget && EventTarget.prototype );\n  PointerEventHandler.prototype.constructor = PointerEventHandler;\n\n  /**\n   * Set up the event sources (mouse, touch and native pointers)\n   * that generate pointer events.\n   */\n  PointerEventHandler.prototype.registerSources = function registerSources () {\n    if (POINTER) {\n      this.registerSource('native', new NativeSource(this));\n    } else if (MSPOINTER) {\n      this.registerSource('ms', new MsSource(this));\n    } else {\n      var mouseSource = new MouseSource(this);\n      this.registerSource('mouse', mouseSource);\n\n      if (TOUCH) {\n        this.registerSource('touch', new TouchSource(this, mouseSource));\n      }\n    }\n\n    // register events on the viewport element\n    this.register_();\n  };\n\n  /**\n   * Add a new event source that will generate pointer events.\n   *\n   * @param {string} name A name for the event source\n   * @param {import(\"./EventSource.js\").default} source The source event.\n   */\n  PointerEventHandler.prototype.registerSource = function registerSource (name, source) {\n    var s = source;\n    var newEvents = s.getEvents();\n\n    if (newEvents) {\n      newEvents.forEach(function(e) {\n        var handler = s.getHandlerForEvent(e);\n\n        if (handler) {\n          this.eventMap_[e] = handler.bind(s);\n        }\n      }.bind(this));\n      this.eventSourceList_.push(s);\n    }\n  };\n\n  /**\n   * Set up the events for all registered event sources.\n   * @private\n   */\n  PointerEventHandler.prototype.register_ = function register_ () {\n    var l = this.eventSourceList_.length;\n    for (var i = 0; i < l; i++) {\n      var eventSource = this.eventSourceList_[i];\n      this.addEvents_(eventSource.getEvents());\n    }\n  };\n\n  /**\n   * Remove all registered events.\n   * @private\n   */\n  PointerEventHandler.prototype.unregister_ = function unregister_ () {\n    var l = this.eventSourceList_.length;\n    for (var i = 0; i < l; i++) {\n      var eventSource = this.eventSourceList_[i];\n      this.removeEvents_(eventSource.getEvents());\n    }\n  };\n\n  /**\n   * Calls the right handler for a new event.\n   * @private\n   * @param {Event} inEvent Browser event.\n   */\n  PointerEventHandler.prototype.eventHandler_ = function eventHandler_ (inEvent) {\n    var type = inEvent.type;\n    var handler = this.eventMap_[type];\n    if (handler) {\n      handler(inEvent);\n    }\n  };\n\n  /**\n   * Setup listeners for the given events.\n   * @private\n   * @param {Array<string>} events List of events.\n   */\n  PointerEventHandler.prototype.addEvents_ = function addEvents_ (events) {\n    events.forEach(function(eventName) {\n      listen(this.element_, eventName, this.eventHandler_, this);\n    }.bind(this));\n  };\n\n  /**\n   * Unregister listeners for the given events.\n   * @private\n   * @param {Array<string>} events List of events.\n   */\n  PointerEventHandler.prototype.removeEvents_ = function removeEvents_ (events) {\n    events.forEach(function(e) {\n      unlisten(this.element_, e, this.eventHandler_, this);\n    }.bind(this));\n  };\n\n  /**\n   * Returns a snapshot of inEvent, with writable properties.\n   *\n   * @param {Event} event Browser event.\n   * @param {Event|Touch} inEvent An event that contains\n   *    properties to copy.\n   * @return {Object} An object containing shallow copies of\n   *    `inEvent`'s properties.\n   */\n  PointerEventHandler.prototype.cloneEvent = function cloneEvent (event, inEvent) {\n    var eventCopy = {};\n    for (var i = 0, ii = CLONE_PROPS.length; i < ii; i++) {\n      var p = CLONE_PROPS[i][0];\n      eventCopy[p] = event[p] || inEvent[p] || CLONE_PROPS[i][1];\n    }\n\n    return eventCopy;\n  };\n\n  // EVENTS\n\n\n  /**\n   * Triggers a 'pointerdown' event.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.down = function down (data, event) {\n    this.fireEvent(PointerEventType.POINTERDOWN, data, event);\n  };\n\n  /**\n   * Triggers a 'pointermove' event.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.move = function move (data, event) {\n    this.fireEvent(PointerEventType.POINTERMOVE, data, event);\n  };\n\n  /**\n   * Triggers a 'pointerup' event.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.up = function up (data, event) {\n    this.fireEvent(PointerEventType.POINTERUP, data, event);\n  };\n\n  /**\n   * Triggers a 'pointerenter' event.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.enter = function enter (data, event) {\n    data.bubbles = false;\n    this.fireEvent(PointerEventType.POINTERENTER, data, event);\n  };\n\n  /**\n   * Triggers a 'pointerleave' event.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.leave = function leave (data, event) {\n    data.bubbles = false;\n    this.fireEvent(PointerEventType.POINTERLEAVE, data, event);\n  };\n\n  /**\n   * Triggers a 'pointerover' event.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.over = function over (data, event) {\n    data.bubbles = true;\n    this.fireEvent(PointerEventType.POINTEROVER, data, event);\n  };\n\n  /**\n   * Triggers a 'pointerout' event.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.out = function out (data, event) {\n    data.bubbles = true;\n    this.fireEvent(PointerEventType.POINTEROUT, data, event);\n  };\n\n  /**\n   * Triggers a 'pointercancel' event.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.cancel = function cancel (data, event) {\n    this.fireEvent(PointerEventType.POINTERCANCEL, data, event);\n  };\n\n  /**\n   * Triggers a combination of 'pointerout' and 'pointerleave' events.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.leaveOut = function leaveOut (data, event) {\n    this.out(data, event);\n    if (!this.contains_(data.target, data.relatedTarget)) {\n      this.leave(data, event);\n    }\n  };\n\n  /**\n   * Triggers a combination of 'pointerover' and 'pointerevents' events.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.enterOver = function enterOver (data, event) {\n    this.over(data, event);\n    if (!this.contains_(data.target, data.relatedTarget)) {\n      this.enter(data, event);\n    }\n  };\n\n  /**\n   * @private\n   * @param {Element} container The container element.\n   * @param {Element} contained The contained element.\n   * @return {boolean} Returns true if the container element\n   *   contains the other element.\n   */\n  PointerEventHandler.prototype.contains_ = function contains_ (container, contained) {\n    if (!container || !contained) {\n      return false;\n    }\n    return container.contains(contained);\n  };\n\n  // EVENT CREATION AND TRACKING\n  /**\n   * Creates a new Event of type `inType`, based on the information in\n   * `data`.\n   *\n   * @param {string} inType A string representing the type of event to create.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   * @return {PointerEvent} A PointerEvent of type `inType`.\n   */\n  PointerEventHandler.prototype.makeEvent = function makeEvent (inType, data, event) {\n    return new PointerEvent(inType, event, data);\n  };\n\n  /**\n   * Make and dispatch an event in one call.\n   * @param {string} inType A string representing the type of event.\n   * @param {Object} data Pointer event data.\n   * @param {Event} event The event.\n   */\n  PointerEventHandler.prototype.fireEvent = function fireEvent (inType, data, event) {\n    var e = this.makeEvent(inType, data, event);\n    this.dispatchEvent(e);\n  };\n\n  /**\n   * Creates a pointer event from a native pointer event\n   * and dispatches this event.\n   * @param {Event} event A platform event with a target.\n   */\n  PointerEventHandler.prototype.fireNativeEvent = function fireNativeEvent (event) {\n    var e = this.makeEvent(event.type, event, event);\n    this.dispatchEvent(e);\n  };\n\n  /**\n   * Wrap a native mouse event into a pointer event.\n   * This proxy method is required for the legacy IE support.\n   * @param {string} eventType The pointer event type.\n   * @param {Event} event The event.\n   * @return {PointerEvent} The wrapped event.\n   */\n  PointerEventHandler.prototype.wrapMouseEvent = function wrapMouseEvent (eventType, event) {\n    var pointerEvent = this.makeEvent(\n      eventType, prepareMouseEvent(event, this), event);\n    return pointerEvent;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  PointerEventHandler.prototype.disposeInternal = function disposeInternal () {\n    this.unregister_();\n    EventTarget.prototype.disposeInternal.call(this);\n  };\n\n  return PointerEventHandler;\n}(EventTarget));\n\nexport default PointerEventHandler;\n\n//# sourceMappingURL=PointerEventHandler.js.map","/**\n * @module ol/MapBrowserEventHandler\n */\nimport {DEVICE_PIXEL_RATIO} from './has.js';\nimport MapBrowserEventType from './MapBrowserEventType.js';\nimport MapBrowserPointerEvent from './MapBrowserPointerEvent.js';\nimport {listen, unlistenByKey} from './events.js';\nimport EventTarget from './events/Target.js';\nimport PointerEventType from './pointer/EventType.js';\nimport PointerEventHandler from './pointer/PointerEventHandler.js';\n\nvar MapBrowserEventHandler = /*@__PURE__*/(function (EventTarget) {\n  function MapBrowserEventHandler(map, moveTolerance) {\n\n    EventTarget.call(this);\n\n    /**\n     * This is the element that we will listen to the real events on.\n     * @type {import(\"./PluggableMap.js\").default}\n     * @private\n     */\n    this.map_ = map;\n\n    /**\n     * @type {any}\n     * @private\n     */\n    this.clickTimeoutId_;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.dragging_ = false;\n\n    /**\n     * @type {!Array<import(\"./events.js\").EventsKey>}\n     * @private\n     */\n    this.dragListenerKeys_ = [];\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.moveTolerance_ = moveTolerance ?\n      moveTolerance * DEVICE_PIXEL_RATIO : DEVICE_PIXEL_RATIO;\n\n    /**\n     * The most recent \"down\" type event (or null if none have occurred).\n     * Set on pointerdown.\n     * @type {import(\"./pointer/PointerEvent.js\").default}\n     * @private\n     */\n    this.down_ = null;\n\n    var element = this.map_.getViewport();\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.activePointers_ = 0;\n\n    /**\n     * @type {!Object<number, boolean>}\n     * @private\n     */\n    this.trackedTouches_ = {};\n\n    /**\n     * Event handler which generates pointer events for\n     * the viewport element.\n     *\n     * @type {PointerEventHandler}\n     * @private\n     */\n    this.pointerEventHandler_ = new PointerEventHandler(element);\n\n    /**\n     * Event handler which generates pointer events for\n     * the document (used when dragging).\n     *\n     * @type {PointerEventHandler}\n     * @private\n     */\n    this.documentPointerEventHandler_ = null;\n\n    /**\n     * @type {?import(\"./events.js\").EventsKey}\n     * @private\n     */\n    this.pointerdownListenerKey_ = listen(this.pointerEventHandler_,\n      PointerEventType.POINTERDOWN,\n      this.handlePointerDown_, this);\n\n    /**\n     * @type {?import(\"./events.js\").EventsKey}\n     * @private\n     */\n    this.relayedListenerKey_ = listen(this.pointerEventHandler_,\n      PointerEventType.POINTERMOVE,\n      this.relayEvent_, this);\n\n  }\n\n  if ( EventTarget ) MapBrowserEventHandler.__proto__ = EventTarget;\n  MapBrowserEventHandler.prototype = Object.create( EventTarget && EventTarget.prototype );\n  MapBrowserEventHandler.prototype.constructor = MapBrowserEventHandler;\n\n  /**\n   * @param {import(\"./pointer/PointerEvent.js\").default} pointerEvent Pointer\n   * event.\n   * @private\n   */\n  MapBrowserEventHandler.prototype.emulateClick_ = function emulateClick_ (pointerEvent) {\n    var newEvent = new MapBrowserPointerEvent(\n      MapBrowserEventType.CLICK, this.map_, pointerEvent);\n    this.dispatchEvent(newEvent);\n    if (this.clickTimeoutId_ !== undefined) {\n      // double-click\n      clearTimeout(this.clickTimeoutId_);\n      this.clickTimeoutId_ = undefined;\n      newEvent = new MapBrowserPointerEvent(\n        MapBrowserEventType.DBLCLICK, this.map_, pointerEvent);\n      this.dispatchEvent(newEvent);\n    } else {\n      // click\n      this.clickTimeoutId_ = setTimeout(function() {\n        this.clickTimeoutId_ = undefined;\n        var newEvent = new MapBrowserPointerEvent(\n          MapBrowserEventType.SINGLECLICK, this.map_, pointerEvent);\n        this.dispatchEvent(newEvent);\n      }.bind(this), 250);\n    }\n  };\n\n  /**\n   * Keeps track on how many pointers are currently active.\n   *\n   * @param {import(\"./pointer/PointerEvent.js\").default} pointerEvent Pointer\n   * event.\n   * @private\n   */\n  MapBrowserEventHandler.prototype.updateActivePointers_ = function updateActivePointers_ (pointerEvent) {\n    var event = pointerEvent;\n\n    if (event.type == MapBrowserEventType.POINTERUP ||\n        event.type == MapBrowserEventType.POINTERCANCEL) {\n      delete this.trackedTouches_[event.pointerId];\n    } else if (event.type == MapBrowserEventType.POINTERDOWN) {\n      this.trackedTouches_[event.pointerId] = true;\n    }\n    this.activePointers_ = Object.keys(this.trackedTouches_).length;\n  };\n\n  /**\n   * @param {import(\"./pointer/PointerEvent.js\").default} pointerEvent Pointer\n   * event.\n   * @private\n   */\n  MapBrowserEventHandler.prototype.handlePointerUp_ = function handlePointerUp_ (pointerEvent) {\n    this.updateActivePointers_(pointerEvent);\n    var newEvent = new MapBrowserPointerEvent(\n      MapBrowserEventType.POINTERUP, this.map_, pointerEvent);\n    this.dispatchEvent(newEvent);\n\n    // We emulate click events on left mouse button click, touch contact, and pen\n    // contact. isMouseActionButton returns true in these cases (evt.button is set\n    // to 0).\n    // See http://www.w3.org/TR/pointerevents/#button-states\n    // We only fire click, singleclick, and doubleclick if nobody has called\n    // event.stopPropagation() or event.preventDefault().\n    if (!newEvent.propagationStopped && !this.dragging_ && this.isMouseActionButton_(pointerEvent)) {\n      this.emulateClick_(this.down_);\n    }\n\n    if (this.activePointers_ === 0) {\n      this.dragListenerKeys_.forEach(unlistenByKey);\n      this.dragListenerKeys_.length = 0;\n      this.dragging_ = false;\n      this.down_ = null;\n      this.documentPointerEventHandler_.dispose();\n      this.documentPointerEventHandler_ = null;\n    }\n  };\n\n  /**\n   * @param {import(\"./pointer/PointerEvent.js\").default} pointerEvent Pointer\n   * event.\n   * @return {boolean} If the left mouse button was pressed.\n   * @private\n   */\n  MapBrowserEventHandler.prototype.isMouseActionButton_ = function isMouseActionButton_ (pointerEvent) {\n    return pointerEvent.button === 0;\n  };\n\n  /**\n   * @param {import(\"./pointer/PointerEvent.js\").default} pointerEvent Pointer\n   * event.\n   * @private\n   */\n  MapBrowserEventHandler.prototype.handlePointerDown_ = function handlePointerDown_ (pointerEvent) {\n    this.updateActivePointers_(pointerEvent);\n    var newEvent = new MapBrowserPointerEvent(\n      MapBrowserEventType.POINTERDOWN, this.map_, pointerEvent);\n    this.dispatchEvent(newEvent);\n\n    this.down_ = pointerEvent;\n\n    if (this.dragListenerKeys_.length === 0) {\n      /* Set up a pointer event handler on the `document`,\n       * which is required when the pointer is moved outside\n       * the viewport when dragging.\n       */\n      this.documentPointerEventHandler_ =\n          new PointerEventHandler(document);\n\n      this.dragListenerKeys_.push(\n        listen(this.documentPointerEventHandler_,\n          MapBrowserEventType.POINTERMOVE,\n          this.handlePointerMove_, this),\n        listen(this.documentPointerEventHandler_,\n          MapBrowserEventType.POINTERUP,\n          this.handlePointerUp_, this),\n        /* Note that the listener for `pointercancel is set up on\n         * `pointerEventHandler_` and not `documentPointerEventHandler_` like\n         * the `pointerup` and `pointermove` listeners.\n         *\n         * The reason for this is the following: `TouchSource.vacuumTouches_()`\n         * issues `pointercancel` events, when there was no `touchend` for a\n         * `touchstart`. Now, let's say a first `touchstart` is registered on\n         * `pointerEventHandler_`. The `documentPointerEventHandler_` is set up.\n         * But `documentPointerEventHandler_` doesn't know about the first\n         * `touchstart`. If there is no `touchend` for the `touchstart`, we can\n         * only receive a `touchcancel` from `pointerEventHandler_`, because it is\n         * only registered there.\n         */\n        listen(this.pointerEventHandler_,\n          MapBrowserEventType.POINTERCANCEL,\n          this.handlePointerUp_, this)\n      );\n    }\n  };\n\n  /**\n   * @param {import(\"./pointer/PointerEvent.js\").default} pointerEvent Pointer\n   * event.\n   * @private\n   */\n  MapBrowserEventHandler.prototype.handlePointerMove_ = function handlePointerMove_ (pointerEvent) {\n    // Between pointerdown and pointerup, pointermove events are triggered.\n    // To avoid a 'false' touchmove event to be dispatched, we test if the pointer\n    // moved a significant distance.\n    if (this.isMoving_(pointerEvent)) {\n      this.dragging_ = true;\n      var newEvent = new MapBrowserPointerEvent(\n        MapBrowserEventType.POINTERDRAG, this.map_, pointerEvent,\n        this.dragging_);\n      this.dispatchEvent(newEvent);\n    }\n\n    // Some native android browser triggers mousemove events during small period\n    // of time. See: https://code.google.com/p/android/issues/detail?id=5491 or\n    // https://code.google.com/p/android/issues/detail?id=19827\n    // ex: Galaxy Tab P3110 + Android 4.1.1\n    pointerEvent.preventDefault();\n  };\n\n  /**\n   * Wrap and relay a pointer event.  Note that this requires that the type\n   * string for the MapBrowserPointerEvent matches the PointerEvent type.\n   * @param {import(\"./pointer/PointerEvent.js\").default} pointerEvent Pointer\n   * event.\n   * @private\n   */\n  MapBrowserEventHandler.prototype.relayEvent_ = function relayEvent_ (pointerEvent) {\n    var dragging = !!(this.down_ && this.isMoving_(pointerEvent));\n    this.dispatchEvent(new MapBrowserPointerEvent(\n      pointerEvent.type, this.map_, pointerEvent, dragging));\n  };\n\n  /**\n   * @param {import(\"./pointer/PointerEvent.js\").default} pointerEvent Pointer\n   * event.\n   * @return {boolean} Is moving.\n   * @private\n   */\n  MapBrowserEventHandler.prototype.isMoving_ = function isMoving_ (pointerEvent) {\n    return this.dragging_ ||\n        Math.abs(pointerEvent.clientX - this.down_.clientX) > this.moveTolerance_ ||\n        Math.abs(pointerEvent.clientY - this.down_.clientY) > this.moveTolerance_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  MapBrowserEventHandler.prototype.disposeInternal = function disposeInternal () {\n    if (this.relayedListenerKey_) {\n      unlistenByKey(this.relayedListenerKey_);\n      this.relayedListenerKey_ = null;\n    }\n    if (this.pointerdownListenerKey_) {\n      unlistenByKey(this.pointerdownListenerKey_);\n      this.pointerdownListenerKey_ = null;\n    }\n\n    this.dragListenerKeys_.forEach(unlistenByKey);\n    this.dragListenerKeys_.length = 0;\n\n    if (this.documentPointerEventHandler_) {\n      this.documentPointerEventHandler_.dispose();\n      this.documentPointerEventHandler_ = null;\n    }\n    if (this.pointerEventHandler_) {\n      this.pointerEventHandler_.dispose();\n      this.pointerEventHandler_ = null;\n    }\n    EventTarget.prototype.disposeInternal.call(this);\n  };\n\n  return MapBrowserEventHandler;\n}(EventTarget));\n\n\nexport default MapBrowserEventHandler;\n\n//# sourceMappingURL=MapBrowserEventHandler.js.map","/**\n * @module ol/MapProperty\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  LAYERGROUP: 'layergroup',\n  SIZE: 'size',\n  TARGET: 'target',\n  VIEW: 'view'\n};\n\n//# sourceMappingURL=MapProperty.js.map","/**\n * @module ol/render/EventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  /**\n   * @event module:ol/render/Event~RenderEvent#postcompose\n   * @api\n   */\n  POSTCOMPOSE: 'postcompose',\n  /**\n   * @event module:ol/render/Event~RenderEvent#precompose\n   * @api\n   */\n  PRECOMPOSE: 'precompose',\n  /**\n   * @event module:ol/render/Event~RenderEvent#render\n   * @api\n   */\n  RENDER: 'render',\n  /**\n   * Triggered when rendering is complete, i.e. all sources and tiles have\n   * finished loading for the current viewport, and all tiles are faded in.\n   * @event module:ol/render/Event~RenderEvent#rendercomplete\n   * @api\n   */\n  RENDERCOMPLETE: 'rendercomplete'\n};\n\n//# sourceMappingURL=EventType.js.map","/**\n * @module ol/TileState\n */\n\n/**\n * @enum {number}\n */\nexport default {\n  IDLE: 0,\n  LOADING: 1,\n  LOADED: 2,\n  /**\n   * Indicates that tile loading failed\n   * @type {number}\n   */\n  ERROR: 3,\n  EMPTY: 4,\n  ABORT: 5\n};\n\n//# sourceMappingURL=TileState.js.map","/**\n * @module ol/asserts\n */\nimport AssertionError from './AssertionError.js';\n\n/**\n * @param {*} assertion Assertion we expected to be truthy.\n * @param {number} errorCode Error code.\n */\nexport function assert(assertion, errorCode) {\n  if (!assertion) {\n    throw new AssertionError(errorCode);\n  }\n}\n\n//# sourceMappingURL=asserts.js.map","/**\n * @module ol/structs/PriorityQueue\n */\nimport {assert} from '../asserts.js';\nimport {clear} from '../obj.js';\n\n\n/**\n * @type {number}\n */\nexport var DROP = Infinity;\n\n\n/**\n * @classdesc\n * Priority queue.\n *\n * The implementation is inspired from the Closure Library's Heap class and\n * Python's heapq module.\n *\n * See http://closure-library.googlecode.com/svn/docs/closure_goog_structs_heap.js.source.html\n * and http://hg.python.org/cpython/file/2.7/Lib/heapq.py.\n *\n * @template T\n */\nvar PriorityQueue = function PriorityQueue(priorityFunction, keyFunction) {\n\n  /**\n   * @type {function(T): number}\n   * @private\n   */\n  this.priorityFunction_ = priorityFunction;\n\n  /**\n   * @type {function(T): string}\n   * @private\n   */\n  this.keyFunction_ = keyFunction;\n\n  /**\n   * @type {Array<T>}\n   * @private\n   */\n  this.elements_ = [];\n\n  /**\n   * @type {Array<number>}\n   * @private\n   */\n  this.priorities_ = [];\n\n  /**\n   * @type {!Object<string, boolean>}\n   * @private\n   */\n  this.queuedElements_ = {};\n\n};\n\n/**\n * FIXME empty description for jsdoc\n */\nPriorityQueue.prototype.clear = function clear$1 () {\n  this.elements_.length = 0;\n  this.priorities_.length = 0;\n  clear(this.queuedElements_);\n};\n\n\n/**\n * Remove and return the highest-priority element. O(log N).\n * @return {T} Element.\n */\nPriorityQueue.prototype.dequeue = function dequeue () {\n  var elements = this.elements_;\n  var priorities = this.priorities_;\n  var element = elements[0];\n  if (elements.length == 1) {\n    elements.length = 0;\n    priorities.length = 0;\n  } else {\n    elements[0] = elements.pop();\n    priorities[0] = priorities.pop();\n    this.siftUp_(0);\n  }\n  var elementKey = this.keyFunction_(element);\n  delete this.queuedElements_[elementKey];\n  return element;\n};\n\n\n/**\n * Enqueue an element. O(log N).\n * @param {T} element Element.\n * @return {boolean} The element was added to the queue.\n */\nPriorityQueue.prototype.enqueue = function enqueue (element) {\n  assert(!(this.keyFunction_(element) in this.queuedElements_),\n    31); // Tried to enqueue an `element` that was already added to the queue\n  var priority = this.priorityFunction_(element);\n  if (priority != DROP) {\n    this.elements_.push(element);\n    this.priorities_.push(priority);\n    this.queuedElements_[this.keyFunction_(element)] = true;\n    this.siftDown_(0, this.elements_.length - 1);\n    return true;\n  }\n  return false;\n};\n\n\n/**\n * @return {number} Count.\n */\nPriorityQueue.prototype.getCount = function getCount () {\n  return this.elements_.length;\n};\n\n\n/**\n * Gets the index of the left child of the node at the given index.\n * @param {number} index The index of the node to get the left child for.\n * @return {number} The index of the left child.\n * @private\n */\nPriorityQueue.prototype.getLeftChildIndex_ = function getLeftChildIndex_ (index) {\n  return index * 2 + 1;\n};\n\n\n/**\n * Gets the index of the right child of the node at the given index.\n * @param {number} index The index of the node to get the right child for.\n * @return {number} The index of the right child.\n * @private\n */\nPriorityQueue.prototype.getRightChildIndex_ = function getRightChildIndex_ (index) {\n  return index * 2 + 2;\n};\n\n\n/**\n * Gets the index of the parent of the node at the given index.\n * @param {number} index The index of the node to get the parent for.\n * @return {number} The index of the parent.\n * @private\n */\nPriorityQueue.prototype.getParentIndex_ = function getParentIndex_ (index) {\n  return (index - 1) >> 1;\n};\n\n\n/**\n * Make this a heap. O(N).\n * @private\n */\nPriorityQueue.prototype.heapify_ = function heapify_ () {\n  var i;\n  for (i = (this.elements_.length >> 1) - 1; i >= 0; i--) {\n    this.siftUp_(i);\n  }\n};\n\n\n/**\n * @return {boolean} Is empty.\n */\nPriorityQueue.prototype.isEmpty = function isEmpty () {\n  return this.elements_.length === 0;\n};\n\n\n/**\n * @param {string} key Key.\n * @return {boolean} Is key queued.\n */\nPriorityQueue.prototype.isKeyQueued = function isKeyQueued (key) {\n  return key in this.queuedElements_;\n};\n\n\n/**\n * @param {T} element Element.\n * @return {boolean} Is queued.\n */\nPriorityQueue.prototype.isQueued = function isQueued (element) {\n  return this.isKeyQueued(this.keyFunction_(element));\n};\n\n\n/**\n * @param {number} index The index of the node to move down.\n * @private\n */\nPriorityQueue.prototype.siftUp_ = function siftUp_ (index) {\n  var elements = this.elements_;\n  var priorities = this.priorities_;\n  var count = elements.length;\n  var element = elements[index];\n  var priority = priorities[index];\n  var startIndex = index;\n\n  while (index < (count >> 1)) {\n    var lIndex = this.getLeftChildIndex_(index);\n    var rIndex = this.getRightChildIndex_(index);\n\n    var smallerChildIndex = rIndex < count &&\n        priorities[rIndex] < priorities[lIndex] ?\n      rIndex : lIndex;\n\n    elements[index] = elements[smallerChildIndex];\n    priorities[index] = priorities[smallerChildIndex];\n    index = smallerChildIndex;\n  }\n\n  elements[index] = element;\n  priorities[index] = priority;\n  this.siftDown_(startIndex, index);\n};\n\n\n/**\n * @param {number} startIndex The index of the root.\n * @param {number} index The index of the node to move up.\n * @private\n */\nPriorityQueue.prototype.siftDown_ = function siftDown_ (startIndex, index) {\n  var elements = this.elements_;\n  var priorities = this.priorities_;\n  var element = elements[index];\n  var priority = priorities[index];\n\n  while (index > startIndex) {\n    var parentIndex = this.getParentIndex_(index);\n    if (priorities[parentIndex] > priority) {\n      elements[index] = elements[parentIndex];\n      priorities[index] = priorities[parentIndex];\n      index = parentIndex;\n    } else {\n      break;\n    }\n  }\n  elements[index] = element;\n  priorities[index] = priority;\n};\n\n\n/**\n * FIXME empty description for jsdoc\n */\nPriorityQueue.prototype.reprioritize = function reprioritize () {\n  var priorityFunction = this.priorityFunction_;\n  var elements = this.elements_;\n  var priorities = this.priorities_;\n  var index = 0;\n  var n = elements.length;\n  var element, i, priority;\n  for (i = 0; i < n; ++i) {\n    element = elements[i];\n    priority = priorityFunction(element);\n    if (priority == DROP) {\n      delete this.queuedElements_[this.keyFunction_(element)];\n    } else {\n      priorities[index] = priority;\n      elements[index++] = element;\n    }\n  }\n  elements.length = index;\n  priorities.length = index;\n  this.heapify_();\n};\n\n\nexport default PriorityQueue;\n\n//# sourceMappingURL=PriorityQueue.js.map","/**\n * @module ol/TileQueue\n */\nimport TileState from './TileState.js';\nimport {listen, unlisten} from './events.js';\nimport EventType from './events/EventType.js';\nimport PriorityQueue from './structs/PriorityQueue.js';\n\n\n/**\n * @typedef {function(import(\"./Tile.js\").default, string, import(\"./coordinate.js\").Coordinate, number): number} PriorityFunction\n */\n\n\nvar TileQueue = /*@__PURE__*/(function (PriorityQueue) {\n  function TileQueue(tilePriorityFunction, tileChangeCallback) {\n\n    PriorityQueue.call(\n      /**\n       * @param {Array} element Element.\n       * @return {number} Priority.\n       */\n      this, function(element) {\n        return tilePriorityFunction.apply(null, element);\n      },\n      /**\n       * @param {Array} element Element.\n       * @return {string} Key.\n       */\n      function(element) {\n        return (/** @type {import(\"./Tile.js\").default} */ (element[0]).getKey());\n      });\n\n    /**\n     * @private\n     * @type {function(): ?}\n     */\n    this.tileChangeCallback_ = tileChangeCallback;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.tilesLoading_ = 0;\n\n    /**\n     * @private\n     * @type {!Object<string,boolean>}\n     */\n    this.tilesLoadingKeys_ = {};\n\n  }\n\n  if ( PriorityQueue ) TileQueue.__proto__ = PriorityQueue;\n  TileQueue.prototype = Object.create( PriorityQueue && PriorityQueue.prototype );\n  TileQueue.prototype.constructor = TileQueue;\n\n  /**\n   * @inheritDoc\n   */\n  TileQueue.prototype.enqueue = function enqueue (element) {\n    var added = PriorityQueue.prototype.enqueue.call(this, element);\n    if (added) {\n      var tile = element[0];\n      listen(tile, EventType.CHANGE, this.handleTileChange, this);\n    }\n    return added;\n  };\n\n  /**\n   * @return {number} Number of tiles loading.\n   */\n  TileQueue.prototype.getTilesLoading = function getTilesLoading () {\n    return this.tilesLoading_;\n  };\n\n  /**\n   * @param {import(\"./events/Event.js\").default} event Event.\n   * @protected\n   */\n  TileQueue.prototype.handleTileChange = function handleTileChange (event) {\n    var tile = /** @type {import(\"./Tile.js\").default} */ (event.target);\n    var state = tile.getState();\n    if (state === TileState.LOADED || state === TileState.ERROR ||\n        state === TileState.EMPTY || state === TileState.ABORT) {\n      unlisten(tile, EventType.CHANGE, this.handleTileChange, this);\n      var tileKey = tile.getKey();\n      if (tileKey in this.tilesLoadingKeys_) {\n        delete this.tilesLoadingKeys_[tileKey];\n        --this.tilesLoading_;\n      }\n      this.tileChangeCallback_();\n    }\n  };\n\n  /**\n   * @param {number} maxTotalLoading Maximum number tiles to load simultaneously.\n   * @param {number} maxNewLoads Maximum number of new tiles to load.\n   */\n  TileQueue.prototype.loadMoreTiles = function loadMoreTiles (maxTotalLoading, maxNewLoads) {\n    var newLoads = 0;\n    var abortedTiles = false;\n    var state, tile, tileKey;\n    while (this.tilesLoading_ < maxTotalLoading && newLoads < maxNewLoads &&\n           this.getCount() > 0) {\n      tile = /** @type {import(\"./Tile.js\").default} */ (this.dequeue()[0]);\n      tileKey = tile.getKey();\n      state = tile.getState();\n      if (state === TileState.ABORT) {\n        abortedTiles = true;\n      } else if (state === TileState.IDLE && !(tileKey in this.tilesLoadingKeys_)) {\n        this.tilesLoadingKeys_[tileKey] = true;\n        ++this.tilesLoading_;\n        ++newLoads;\n        tile.load();\n      }\n    }\n    if (newLoads === 0 && abortedTiles) {\n      // Do not stop the render loop when all wanted tiles were aborted due to\n      // a small, saturated tile cache.\n      this.tileChangeCallback_();\n    }\n  };\n\n  return TileQueue;\n}(PriorityQueue));\n\n\nexport default TileQueue;\n\n//# sourceMappingURL=TileQueue.js.map","/**\n * @module ol/tilegrid/common\n */\n\n/**\n * Default maximum zoom for default tile grids.\n * @type {number}\n */\nexport var DEFAULT_MAX_ZOOM = 42;\n\n/**\n * Default tile size.\n * @type {number}\n */\nexport var DEFAULT_TILE_SIZE = 256;\n\n//# sourceMappingURL=common.js.map","/**\n * @module ol/math\n */\nimport {assert} from './asserts.js';\n\n/**\n * Takes a number and clamps it to within the provided bounds.\n * @param {number} value The input number.\n * @param {number} min The minimum value to return.\n * @param {number} max The maximum value to return.\n * @return {number} The input number if it is within bounds, or the nearest\n *     number within the bounds.\n */\nexport function clamp(value, min, max) {\n  return Math.min(Math.max(value, min), max);\n}\n\n\n/**\n * Return the hyperbolic cosine of a given number. The method will use the\n * native `Math.cosh` function if it is available, otherwise the hyperbolic\n * cosine will be calculated via the reference implementation of the Mozilla\n * developer network.\n *\n * @param {number} x X.\n * @return {number} Hyperbolic cosine of x.\n */\nexport var cosh = (function() {\n  // Wrapped in a iife, to save the overhead of checking for the native\n  // implementation on every invocation.\n  var cosh;\n  if ('cosh' in Math) {\n    // The environment supports the native Math.cosh function, use it…\n    cosh = Math.cosh;\n  } else {\n    // … else, use the reference implementation of MDN:\n    cosh = function(x) {\n      var y = /** @type {Math} */ (Math).exp(x);\n      return (y + 1 / y) / 2;\n    };\n  }\n  return cosh;\n}());\n\n\n/**\n * @param {number} x X.\n * @return {number} The smallest power of two greater than or equal to x.\n */\nexport function roundUpToPowerOfTwo(x) {\n  assert(0 < x, 29); // `x` must be greater than `0`\n  return Math.pow(2, Math.ceil(Math.log(x) / Math.LN2));\n}\n\n\n/**\n * Returns the square of the closest distance between the point (x, y) and the\n * line segment (x1, y1) to (x2, y2).\n * @param {number} x X.\n * @param {number} y Y.\n * @param {number} x1 X1.\n * @param {number} y1 Y1.\n * @param {number} x2 X2.\n * @param {number} y2 Y2.\n * @return {number} Squared distance.\n */\nexport function squaredSegmentDistance(x, y, x1, y1, x2, y2) {\n  var dx = x2 - x1;\n  var dy = y2 - y1;\n  if (dx !== 0 || dy !== 0) {\n    var t = ((x - x1) * dx + (y - y1) * dy) / (dx * dx + dy * dy);\n    if (t > 1) {\n      x1 = x2;\n      y1 = y2;\n    } else if (t > 0) {\n      x1 += dx * t;\n      y1 += dy * t;\n    }\n  }\n  return squaredDistance(x, y, x1, y1);\n}\n\n\n/**\n * Returns the square of the distance between the points (x1, y1) and (x2, y2).\n * @param {number} x1 X1.\n * @param {number} y1 Y1.\n * @param {number} x2 X2.\n * @param {number} y2 Y2.\n * @return {number} Squared distance.\n */\nexport function squaredDistance(x1, y1, x2, y2) {\n  var dx = x2 - x1;\n  var dy = y2 - y1;\n  return dx * dx + dy * dy;\n}\n\n\n/**\n * Solves system of linear equations using Gaussian elimination method.\n *\n * @param {Array<Array<number>>} mat Augmented matrix (n x n + 1 column)\n *                                     in row-major order.\n * @return {Array<number>} The resulting vector.\n */\nexport function solveLinearSystem(mat) {\n  var n = mat.length;\n\n  for (var i = 0; i < n; i++) {\n    // Find max in the i-th column (ignoring i - 1 first rows)\n    var maxRow = i;\n    var maxEl = Math.abs(mat[i][i]);\n    for (var r = i + 1; r < n; r++) {\n      var absValue = Math.abs(mat[r][i]);\n      if (absValue > maxEl) {\n        maxEl = absValue;\n        maxRow = r;\n      }\n    }\n\n    if (maxEl === 0) {\n      return null; // matrix is singular\n    }\n\n    // Swap max row with i-th (current) row\n    var tmp = mat[maxRow];\n    mat[maxRow] = mat[i];\n    mat[i] = tmp;\n\n    // Subtract the i-th row to make all the remaining rows 0 in the i-th column\n    for (var j = i + 1; j < n; j++) {\n      var coef = -mat[j][i] / mat[i][i];\n      for (var k = i; k < n + 1; k++) {\n        if (i == k) {\n          mat[j][k] = 0;\n        } else {\n          mat[j][k] += coef * mat[i][k];\n        }\n      }\n    }\n  }\n\n  // Solve Ax=b for upper triangular matrix A (mat)\n  var x = new Array(n);\n  for (var l = n - 1; l >= 0; l--) {\n    x[l] = mat[l][n] / mat[l][l];\n    for (var m = l - 1; m >= 0; m--) {\n      mat[m][n] -= mat[m][l] * x[l];\n    }\n  }\n  return x;\n}\n\n\n/**\n * Converts radians to to degrees.\n *\n * @param {number} angleInRadians Angle in radians.\n * @return {number} Angle in degrees.\n */\nexport function toDegrees(angleInRadians) {\n  return angleInRadians * 180 / Math.PI;\n}\n\n\n/**\n * Converts degrees to radians.\n *\n * @param {number} angleInDegrees Angle in degrees.\n * @return {number} Angle in radians.\n */\nexport function toRadians(angleInDegrees) {\n  return angleInDegrees * Math.PI / 180;\n}\n\n/**\n * Returns the modulo of a / b, depending on the sign of b.\n *\n * @param {number} a Dividend.\n * @param {number} b Divisor.\n * @return {number} Modulo.\n */\nexport function modulo(a, b) {\n  var r = a % b;\n  return r * b < 0 ? r + b : r;\n}\n\n/**\n * Calculates the linearly interpolated value of x between a and b.\n *\n * @param {number} a Number\n * @param {number} b Number\n * @param {number} x Value to be interpolated.\n * @return {number} Interpolated value.\n */\nexport function lerp(a, b, x) {\n  return a + x * (b - a);\n}\n\n//# sourceMappingURL=math.js.map","/**\n * @module ol/centerconstraint\n */\nimport {clamp} from './math.js';\n\n\n/**\n * @typedef {function((import(\"./coordinate.js\").Coordinate|undefined)): (import(\"./coordinate.js\").Coordinate|undefined)} Type\n */\n\n\n/**\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @return {Type} The constraint.\n */\nexport function createExtent(extent) {\n  return (\n    /**\n     * @param {import(\"./coordinate.js\").Coordinate=} center Center.\n     * @return {import(\"./coordinate.js\").Coordinate|undefined} Center.\n     */\n    function(center) {\n      if (center) {\n        return [\n          clamp(center[0], extent[0], extent[2]),\n          clamp(center[1], extent[1], extent[3])\n        ];\n      } else {\n        return undefined;\n      }\n    }\n  );\n}\n\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate=} center Center.\n * @return {import(\"./coordinate.js\").Coordinate|undefined} Center.\n */\nexport function none(center) {\n  return center;\n}\n\n//# sourceMappingURL=centerconstraint.js.map","/**\n * @module ol/resolutionconstraint\n */\nimport {linearFindNearest} from './array.js';\nimport {clamp} from './math.js';\n\n\n/**\n * @typedef {function((number|undefined), number, number): (number|undefined)} Type\n */\n\n\n/**\n * @param {Array<number>} resolutions Resolutions.\n * @return {Type} Zoom function.\n */\nexport function createSnapToResolutions(resolutions) {\n  return (\n    /**\n     * @param {number|undefined} resolution Resolution.\n     * @param {number} delta Delta.\n     * @param {number} direction Direction.\n     * @return {number|undefined} Resolution.\n     */\n    function(resolution, delta, direction) {\n      if (resolution !== undefined) {\n        var z = linearFindNearest(resolutions, resolution, direction);\n        z = clamp(z + delta, 0, resolutions.length - 1);\n        var index = Math.floor(z);\n        if (z != index && index < resolutions.length - 1) {\n          var power = resolutions[index] / resolutions[index + 1];\n          return resolutions[index] / Math.pow(power, z - index);\n        } else {\n          return resolutions[index];\n        }\n      } else {\n        return undefined;\n      }\n    }\n  );\n}\n\n\n/**\n * @param {number} power Power.\n * @param {number} maxResolution Maximum resolution.\n * @param {number=} opt_maxLevel Maximum level.\n * @return {Type} Zoom function.\n */\nexport function createSnapToPower(power, maxResolution, opt_maxLevel) {\n  return (\n    /**\n     * @param {number|undefined} resolution Resolution.\n     * @param {number} delta Delta.\n     * @param {number} direction Direction.\n     * @return {number|undefined} Resolution.\n     */\n    function(resolution, delta, direction) {\n      if (resolution !== undefined) {\n        var offset = -direction / 2 + 0.5;\n        var oldLevel = Math.floor(\n          Math.log(maxResolution / resolution) / Math.log(power) + offset);\n        var newLevel = Math.max(oldLevel + delta, 0);\n        if (opt_maxLevel !== undefined) {\n          newLevel = Math.min(newLevel, opt_maxLevel);\n        }\n        return maxResolution / Math.pow(power, newLevel);\n      } else {\n        return undefined;\n      }\n    });\n}\n\n//# sourceMappingURL=resolutionconstraint.js.map","/**\n * @module ol/rotationconstraint\n */\nimport {toRadians} from './math.js';\n\n\n/**\n * @typedef {function((number|undefined), number): (number|undefined)} Type\n */\n\n\n/**\n * @param {number|undefined} rotation Rotation.\n * @param {number} delta Delta.\n * @return {number|undefined} Rotation.\n */\nexport function disable(rotation, delta) {\n  if (rotation !== undefined) {\n    return 0;\n  } else {\n    return undefined;\n  }\n}\n\n\n/**\n * @param {number|undefined} rotation Rotation.\n * @param {number} delta Delta.\n * @return {number|undefined} Rotation.\n */\nexport function none(rotation, delta) {\n  if (rotation !== undefined) {\n    return rotation + delta;\n  } else {\n    return undefined;\n  }\n}\n\n\n/**\n * @param {number} n N.\n * @return {Type} Rotation constraint.\n */\nexport function createSnapToN(n) {\n  var theta = 2 * Math.PI / n;\n  return (\n    /**\n     * @param {number|undefined} rotation Rotation.\n     * @param {number} delta Delta.\n     * @return {number|undefined} Rotation.\n     */\n    function(rotation, delta) {\n      if (rotation !== undefined) {\n        rotation = Math.floor((rotation + delta) / theta + 0.5) * theta;\n        return rotation;\n      } else {\n        return undefined;\n      }\n    });\n}\n\n\n/**\n * @param {number=} opt_tolerance Tolerance.\n * @return {Type} Rotation constraint.\n */\nexport function createSnapToZero(opt_tolerance) {\n  var tolerance = opt_tolerance || toRadians(5);\n  return (\n    /**\n     * @param {number|undefined} rotation Rotation.\n     * @param {number} delta Delta.\n     * @return {number|undefined} Rotation.\n     */\n    function(rotation, delta) {\n      if (rotation !== undefined) {\n        if (Math.abs(rotation + delta) <= tolerance) {\n          return 0;\n        } else {\n          return rotation + delta;\n        }\n      } else {\n        return undefined;\n      }\n    });\n}\n\n//# sourceMappingURL=rotationconstraint.js.map","/**\n * @module ol/ViewHint\n */\n\n/**\n * @enum {number}\n */\nexport default {\n  ANIMATING: 0,\n  INTERACTING: 1\n};\n\n//# sourceMappingURL=ViewHint.js.map","/**\n * @module ol/ViewProperty\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  CENTER: 'center',\n  RESOLUTION: 'resolution',\n  ROTATION: 'rotation'\n};\n\n//# sourceMappingURL=ViewProperty.js.map","/**\n * @module ol/string\n */\n\n/**\n * @param {number} number Number to be formatted\n * @param {number} width The desired width\n * @param {number=} opt_precision Precision of the output string (i.e. number of decimal places)\n * @returns {string} Formatted string\n */\nexport function padNumber(number, width, opt_precision) {\n  var numberString = opt_precision !== undefined ? number.toFixed(opt_precision) : '' + number;\n  var decimal = numberString.indexOf('.');\n  decimal = decimal === -1 ? numberString.length : decimal;\n  return decimal > width ? numberString : new Array(1 + width - decimal).join('0') + numberString;\n}\n\n\n/**\n * Adapted from https://github.com/omichelsen/compare-versions/blob/master/index.js\n * @param {string|number} v1 First version\n * @param {string|number} v2 Second version\n * @returns {number} Value\n */\nexport function compareVersions(v1, v2) {\n  var s1 = ('' + v1).split('.');\n  var s2 = ('' + v2).split('.');\n\n  for (var i = 0; i < Math.max(s1.length, s2.length); i++) {\n    var n1 = parseInt(s1[i] || '0', 10);\n    var n2 = parseInt(s2[i] || '0', 10);\n\n    if (n1 > n2) {\n      return 1;\n    }\n    if (n2 > n1) {\n      return -1;\n    }\n  }\n\n  return 0;\n}\n\n//# sourceMappingURL=string.js.map","/**\n * @module ol/coordinate\n */\nimport {modulo} from './math.js';\nimport {padNumber} from './string.js';\n\n\n/**\n * An array of numbers representing an xy coordinate. Example: `[16, 48]`.\n * @typedef {Array<number>} Coordinate\n * @api\n */\n\n\n/**\n * A function that takes a {@link module:ol/coordinate~Coordinate} and\n * transforms it into a `{string}`.\n *\n * @typedef {function((Coordinate|undefined)): string} CoordinateFormat\n * @api\n */\n\n\n/**\n * Add `delta` to `coordinate`. `coordinate` is modified in place and returned\n * by the function.\n *\n * Example:\n *\n *     import {add} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     add(coord, [-2, 4]);\n *     // coord is now [5.85, 51.983333]\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {Coordinate} delta Delta.\n * @return {Coordinate} The input coordinate adjusted by\n * the given delta.\n * @api\n */\nexport function add(coordinate, delta) {\n  coordinate[0] += delta[0];\n  coordinate[1] += delta[1];\n  return coordinate;\n}\n\n\n/**\n * Calculates the point closest to the passed coordinate on the passed circle.\n *\n * @param {Coordinate} coordinate The coordinate.\n * @param {import(\"./geom/Circle.js\").default} circle The circle.\n * @return {Coordinate} Closest point on the circumference.\n */\nexport function closestOnCircle(coordinate, circle) {\n  var r = circle.getRadius();\n  var center = circle.getCenter();\n  var x0 = center[0];\n  var y0 = center[1];\n  var x1 = coordinate[0];\n  var y1 = coordinate[1];\n\n  var dx = x1 - x0;\n  var dy = y1 - y0;\n  if (dx === 0 && dy === 0) {\n    dx = 1;\n  }\n  var d = Math.sqrt(dx * dx + dy * dy);\n\n  var x = x0 + r * dx / d;\n  var y = y0 + r * dy / d;\n\n  return [x, y];\n}\n\n\n/**\n * Calculates the point closest to the passed coordinate on the passed segment.\n * This is the foot of the perpendicular of the coordinate to the segment when\n * the foot is on the segment, or the closest segment coordinate when the foot\n * is outside the segment.\n *\n * @param {Coordinate} coordinate The coordinate.\n * @param {Array<Coordinate>} segment The two coordinates\n * of the segment.\n * @return {Coordinate} The foot of the perpendicular of\n * the coordinate to the segment.\n */\nexport function closestOnSegment(coordinate, segment) {\n  var x0 = coordinate[0];\n  var y0 = coordinate[1];\n  var start = segment[0];\n  var end = segment[1];\n  var x1 = start[0];\n  var y1 = start[1];\n  var x2 = end[0];\n  var y2 = end[1];\n  var dx = x2 - x1;\n  var dy = y2 - y1;\n  var along = (dx === 0 && dy === 0) ? 0 :\n    ((dx * (x0 - x1)) + (dy * (y0 - y1))) / ((dx * dx + dy * dy) || 0);\n  var x, y;\n  if (along <= 0) {\n    x = x1;\n    y = y1;\n  } else if (along >= 1) {\n    x = x2;\n    y = y2;\n  } else {\n    x = x1 + along * dx;\n    y = y1 + along * dy;\n  }\n  return [x, y];\n}\n\n\n/**\n * Returns a {@link module:ol/coordinate~CoordinateFormat} function that can be\n * used to format\n * a {Coordinate} to a string.\n *\n * Example without specifying the fractional digits:\n *\n *     import {createStringXY} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     var stringifyFunc = createStringXY();\n *     var out = stringifyFunc(coord);\n *     // out is now '8, 48'\n *\n * Example with explicitly specifying 2 fractional digits:\n *\n *     import {createStringXY} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     var stringifyFunc = createStringXY(2);\n *     var out = stringifyFunc(coord);\n *     // out is now '7.85, 47.98'\n *\n * @param {number=} opt_fractionDigits The number of digits to include\n *    after the decimal point. Default is `0`.\n * @return {CoordinateFormat} Coordinate format.\n * @api\n */\nexport function createStringXY(opt_fractionDigits) {\n  return (\n    /**\n     * @param {Coordinate} coordinate Coordinate.\n     * @return {string} String XY.\n     */\n    function(coordinate) {\n      return toStringXY(coordinate, opt_fractionDigits);\n    }\n  );\n}\n\n\n/**\n * @param {string} hemispheres Hemispheres.\n * @param {number} degrees Degrees.\n * @param {number=} opt_fractionDigits The number of digits to include\n *    after the decimal point. Default is `0`.\n * @return {string} String.\n */\nexport function degreesToStringHDMS(hemispheres, degrees, opt_fractionDigits) {\n  var normalizedDegrees = modulo(degrees + 180, 360) - 180;\n  var x = Math.abs(3600 * normalizedDegrees);\n  var dflPrecision = opt_fractionDigits || 0;\n  var precision = Math.pow(10, dflPrecision);\n\n  var deg = Math.floor(x / 3600);\n  var min = Math.floor((x - deg * 3600) / 60);\n  var sec = x - (deg * 3600) - (min * 60);\n  sec = Math.ceil(sec * precision) / precision;\n\n  if (sec >= 60) {\n    sec = 0;\n    min += 1;\n  }\n\n  if (min >= 60) {\n    min = 0;\n    deg += 1;\n  }\n\n  return deg + '\\u00b0 ' + padNumber(min, 2) + '\\u2032 ' +\n    padNumber(sec, 2, dflPrecision) + '\\u2033' +\n    (normalizedDegrees == 0 ? '' : ' ' + hemispheres.charAt(normalizedDegrees < 0 ? 1 : 0));\n}\n\n\n/**\n * Transforms the given {@link module:ol/coordinate~Coordinate} to a string\n * using the given string template. The strings `{x}` and `{y}` in the template\n * will be replaced with the first and second coordinate values respectively.\n *\n * Example without specifying the fractional digits:\n *\n *     import {format} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     var template = 'Coordinate is ({x}|{y}).';\n *     var out = format(coord, template);\n *     // out is now 'Coordinate is (8|48).'\n *\n * Example explicitly specifying the fractional digits:\n *\n *     import {format} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     var template = 'Coordinate is ({x}|{y}).';\n *     var out = format(coord, template, 2);\n *     // out is now 'Coordinate is (7.85|47.98).'\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {string} template A template string with `{x}` and `{y}` placeholders\n *     that will be replaced by first and second coordinate values.\n * @param {number=} opt_fractionDigits The number of digits to include\n *    after the decimal point. Default is `0`.\n * @return {string} Formatted coordinate.\n * @api\n */\nexport function format(coordinate, template, opt_fractionDigits) {\n  if (coordinate) {\n    return template\n      .replace('{x}', coordinate[0].toFixed(opt_fractionDigits))\n      .replace('{y}', coordinate[1].toFixed(opt_fractionDigits));\n  } else {\n    return '';\n  }\n}\n\n\n/**\n * @param {Coordinate} coordinate1 First coordinate.\n * @param {Coordinate} coordinate2 Second coordinate.\n * @return {boolean} The two coordinates are equal.\n */\nexport function equals(coordinate1, coordinate2) {\n  var equals = true;\n  for (var i = coordinate1.length - 1; i >= 0; --i) {\n    if (coordinate1[i] != coordinate2[i]) {\n      equals = false;\n      break;\n    }\n  }\n  return equals;\n}\n\n\n/**\n * Rotate `coordinate` by `angle`. `coordinate` is modified in place and\n * returned by the function.\n *\n * Example:\n *\n *     import {rotate} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     var rotateRadians = Math.PI / 2; // 90 degrees\n *     rotate(coord, rotateRadians);\n *     // coord is now [-47.983333, 7.85]\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number} angle Angle in radian.\n * @return {Coordinate} Coordinate.\n * @api\n */\nexport function rotate(coordinate, angle) {\n  var cosAngle = Math.cos(angle);\n  var sinAngle = Math.sin(angle);\n  var x = coordinate[0] * cosAngle - coordinate[1] * sinAngle;\n  var y = coordinate[1] * cosAngle + coordinate[0] * sinAngle;\n  coordinate[0] = x;\n  coordinate[1] = y;\n  return coordinate;\n}\n\n\n/**\n * Scale `coordinate` by `scale`. `coordinate` is modified in place and returned\n * by the function.\n *\n * Example:\n *\n *     import {scale as scaleCoordinate} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     var scale = 1.2;\n *     scaleCoordinate(coord, scale);\n *     // coord is now [9.42, 57.5799996]\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number} scale Scale factor.\n * @return {Coordinate} Coordinate.\n */\nexport function scale(coordinate, scale) {\n  coordinate[0] *= scale;\n  coordinate[1] *= scale;\n  return coordinate;\n}\n\n\n/**\n * @param {Coordinate} coord1 First coordinate.\n * @param {Coordinate} coord2 Second coordinate.\n * @return {number} Squared distance between coord1 and coord2.\n */\nexport function squaredDistance(coord1, coord2) {\n  var dx = coord1[0] - coord2[0];\n  var dy = coord1[1] - coord2[1];\n  return dx * dx + dy * dy;\n}\n\n\n/**\n * @param {Coordinate} coord1 First coordinate.\n * @param {Coordinate} coord2 Second coordinate.\n * @return {number} Distance between coord1 and coord2.\n */\nexport function distance(coord1, coord2) {\n  return Math.sqrt(squaredDistance(coord1, coord2));\n}\n\n\n/**\n * Calculate the squared distance from a coordinate to a line segment.\n *\n * @param {Coordinate} coordinate Coordinate of the point.\n * @param {Array<Coordinate>} segment Line segment (2\n * coordinates).\n * @return {number} Squared distance from the point to the line segment.\n */\nexport function squaredDistanceToSegment(coordinate, segment) {\n  return squaredDistance(coordinate,\n    closestOnSegment(coordinate, segment));\n}\n\n\n/**\n * Format a geographic coordinate with the hemisphere, degrees, minutes, and\n * seconds.\n *\n * Example without specifying fractional digits:\n *\n *     import {toStringHDMS} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     var out = toStringHDMS(coord);\n *     // out is now '47° 58′ 60″ N 7° 50′ 60″ E'\n *\n * Example explicitly specifying 1 fractional digit:\n *\n *     import {toStringHDMS} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     var out = toStringHDMS(coord, 1);\n *     // out is now '47° 58′ 60.0″ N 7° 50′ 60.0″ E'\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number=} opt_fractionDigits The number of digits to include\n *    after the decimal point. Default is `0`.\n * @return {string} Hemisphere, degrees, minutes and seconds.\n * @api\n */\nexport function toStringHDMS(coordinate, opt_fractionDigits) {\n  if (coordinate) {\n    return degreesToStringHDMS('NS', coordinate[1], opt_fractionDigits) + ' ' +\n        degreesToStringHDMS('EW', coordinate[0], opt_fractionDigits);\n  } else {\n    return '';\n  }\n}\n\n\n/**\n * Format a coordinate as a comma delimited string.\n *\n * Example without specifying fractional digits:\n *\n *     import {toStringXY} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     var out = toStringXY(coord);\n *     // out is now '8, 48'\n *\n * Example explicitly specifying 1 fractional digit:\n *\n *     import {toStringXY} from 'ol/coordinate';\n *\n *     var coord = [7.85, 47.983333];\n *     var out = toStringXY(coord, 1);\n *     // out is now '7.8, 48.0'\n *\n * @param {Coordinate} coordinate Coordinate.\n * @param {number=} opt_fractionDigits The number of digits to include\n *    after the decimal point. Default is `0`.\n * @return {string} XY.\n * @api\n */\nexport function toStringXY(coordinate, opt_fractionDigits) {\n  return format(coordinate, '{x}, {y}', opt_fractionDigits);\n}\n\n//# sourceMappingURL=coordinate.js.map","/**\n * @module ol/easing\n */\n\n\n/**\n * Start slow and speed up.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function easeIn(t) {\n  return Math.pow(t, 3);\n}\n\n\n/**\n * Start fast and slow down.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function easeOut(t) {\n  return 1 - easeIn(1 - t);\n}\n\n\n/**\n * Start slow, speed up, and then slow down again.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function inAndOut(t) {\n  return 3 * t * t - 2 * t * t * t;\n}\n\n\n/**\n * Maintain a constant speed over time.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function linear(t) {\n  return t;\n}\n\n\n/**\n * Start slow, speed up, and at the very end slow down again.  This has the\n * same general behavior as {@link module:ol/easing~inAndOut}, but the final\n * slowdown is delayed.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function upAndDown(t) {\n  if (t < 0.5) {\n    return inAndOut(2 * t);\n  } else {\n    return 1 - inAndOut(2 * (t - 0.5));\n  }\n}\n\n//# sourceMappingURL=easing.js.map","/**\n * @module ol/extent/Corner\n */\n\n/**\n * Extent corner.\n * @enum {string}\n */\nexport default {\n  BOTTOM_LEFT: 'bottom-left',\n  BOTTOM_RIGHT: 'bottom-right',\n  TOP_LEFT: 'top-left',\n  TOP_RIGHT: 'top-right'\n};\n\n//# sourceMappingURL=Corner.js.map","/**\n * @module ol/extent/Relationship\n */\n\n/**\n * Relationship to an extent.\n * @enum {number}\n */\nexport default {\n  UNKNOWN: 0,\n  INTERSECTING: 1,\n  ABOVE: 2,\n  RIGHT: 4,\n  BELOW: 8,\n  LEFT: 16\n};\n\n//# sourceMappingURL=Relationship.js.map","/**\n * @module ol/extent\n */\nimport {assert} from './asserts.js';\nimport Corner from './extent/Corner.js';\nimport Relationship from './extent/Relationship.js';\n\n\n/**\n * An array of numbers representing an extent: `[minx, miny, maxx, maxy]`.\n * @typedef {Array<number>} Extent\n * @api\n */\n\n/**\n * Build an extent that includes all given coordinates.\n *\n * @param {Array<import(\"./coordinate.js\").Coordinate>} coordinates Coordinates.\n * @return {Extent} Bounding extent.\n * @api\n */\nexport function boundingExtent(coordinates) {\n  var extent = createEmpty();\n  for (var i = 0, ii = coordinates.length; i < ii; ++i) {\n    extendCoordinate(extent, coordinates[i]);\n  }\n  return extent;\n}\n\n\n/**\n * @param {Array<number>} xs Xs.\n * @param {Array<number>} ys Ys.\n * @param {Extent=} opt_extent Destination extent.\n * @private\n * @return {Extent} Extent.\n */\nfunction _boundingExtentXYs(xs, ys, opt_extent) {\n  var minX = Math.min.apply(null, xs);\n  var minY = Math.min.apply(null, ys);\n  var maxX = Math.max.apply(null, xs);\n  var maxY = Math.max.apply(null, ys);\n  return createOrUpdate(minX, minY, maxX, maxY, opt_extent);\n}\n\n\n/**\n * Return extent increased by the provided value.\n * @param {Extent} extent Extent.\n * @param {number} value The amount by which the extent should be buffered.\n * @param {Extent=} opt_extent Extent.\n * @return {Extent} Extent.\n * @api\n */\nexport function buffer(extent, value, opt_extent) {\n  if (opt_extent) {\n    opt_extent[0] = extent[0] - value;\n    opt_extent[1] = extent[1] - value;\n    opt_extent[2] = extent[2] + value;\n    opt_extent[3] = extent[3] + value;\n    return opt_extent;\n  } else {\n    return [\n      extent[0] - value,\n      extent[1] - value,\n      extent[2] + value,\n      extent[3] + value\n    ];\n  }\n}\n\n\n/**\n * Creates a clone of an extent.\n *\n * @param {Extent} extent Extent to clone.\n * @param {Extent=} opt_extent Extent.\n * @return {Extent} The clone.\n */\nexport function clone(extent, opt_extent) {\n  if (opt_extent) {\n    opt_extent[0] = extent[0];\n    opt_extent[1] = extent[1];\n    opt_extent[2] = extent[2];\n    opt_extent[3] = extent[3];\n    return opt_extent;\n  } else {\n    return extent.slice();\n  }\n}\n\n\n/**\n * @param {Extent} extent Extent.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {number} Closest squared distance.\n */\nexport function closestSquaredDistanceXY(extent, x, y) {\n  var dx, dy;\n  if (x < extent[0]) {\n    dx = extent[0] - x;\n  } else if (extent[2] < x) {\n    dx = x - extent[2];\n  } else {\n    dx = 0;\n  }\n  if (y < extent[1]) {\n    dy = extent[1] - y;\n  } else if (extent[3] < y) {\n    dy = y - extent[3];\n  } else {\n    dy = 0;\n  }\n  return dx * dx + dy * dy;\n}\n\n\n/**\n * Check if the passed coordinate is contained or on the edge of the extent.\n *\n * @param {Extent} extent Extent.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @return {boolean} The coordinate is contained in the extent.\n * @api\n */\nexport function containsCoordinate(extent, coordinate) {\n  return containsXY(extent, coordinate[0], coordinate[1]);\n}\n\n\n/**\n * Check if one extent contains another.\n *\n * An extent is deemed contained if it lies completely within the other extent,\n * including if they share one or more edges.\n *\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {boolean} The second extent is contained by or on the edge of the\n *     first.\n * @api\n */\nexport function containsExtent(extent1, extent2) {\n  return extent1[0] <= extent2[0] && extent2[2] <= extent1[2] &&\n      extent1[1] <= extent2[1] && extent2[3] <= extent1[3];\n}\n\n\n/**\n * Check if the passed coordinate is contained or on the edge of the extent.\n *\n * @param {Extent} extent Extent.\n * @param {number} x X coordinate.\n * @param {number} y Y coordinate.\n * @return {boolean} The x, y values are contained in the extent.\n * @api\n */\nexport function containsXY(extent, x, y) {\n  return extent[0] <= x && x <= extent[2] && extent[1] <= y && y <= extent[3];\n}\n\n\n/**\n * Get the relationship between a coordinate and extent.\n * @param {Extent} extent The extent.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate The coordinate.\n * @return {Relationship} The relationship (bitwise compare with\n *     import(\"./extent/Relationship.js\").Relationship).\n */\nexport function coordinateRelationship(extent, coordinate) {\n  var minX = extent[0];\n  var minY = extent[1];\n  var maxX = extent[2];\n  var maxY = extent[3];\n  var x = coordinate[0];\n  var y = coordinate[1];\n  var relationship = Relationship.UNKNOWN;\n  if (x < minX) {\n    relationship = relationship | Relationship.LEFT;\n  } else if (x > maxX) {\n    relationship = relationship | Relationship.RIGHT;\n  }\n  if (y < minY) {\n    relationship = relationship | Relationship.BELOW;\n  } else if (y > maxY) {\n    relationship = relationship | Relationship.ABOVE;\n  }\n  if (relationship === Relationship.UNKNOWN) {\n    relationship = Relationship.INTERSECTING;\n  }\n  return relationship;\n}\n\n\n/**\n * Create an empty extent.\n * @return {Extent} Empty extent.\n * @api\n */\nexport function createEmpty() {\n  return [Infinity, Infinity, -Infinity, -Infinity];\n}\n\n\n/**\n * Create a new extent or update the provided extent.\n * @param {number} minX Minimum X.\n * @param {number} minY Minimum Y.\n * @param {number} maxX Maximum X.\n * @param {number} maxY Maximum Y.\n * @param {Extent=} opt_extent Destination extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdate(minX, minY, maxX, maxY, opt_extent) {\n  if (opt_extent) {\n    opt_extent[0] = minX;\n    opt_extent[1] = minY;\n    opt_extent[2] = maxX;\n    opt_extent[3] = maxY;\n    return opt_extent;\n  } else {\n    return [minX, minY, maxX, maxY];\n  }\n}\n\n\n/**\n * Create a new empty extent or make the provided one empty.\n * @param {Extent=} opt_extent Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateEmpty(opt_extent) {\n  return createOrUpdate(\n    Infinity, Infinity, -Infinity, -Infinity, opt_extent);\n}\n\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {Extent=} opt_extent Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromCoordinate(coordinate, opt_extent) {\n  var x = coordinate[0];\n  var y = coordinate[1];\n  return createOrUpdate(x, y, x, y, opt_extent);\n}\n\n\n/**\n * @param {Array<import(\"./coordinate.js\").Coordinate>} coordinates Coordinates.\n * @param {Extent=} opt_extent Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromCoordinates(coordinates, opt_extent) {\n  var extent = createOrUpdateEmpty(opt_extent);\n  return extendCoordinates(extent, coordinates);\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {Extent=} opt_extent Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromFlatCoordinates(flatCoordinates, offset, end, stride, opt_extent) {\n  var extent = createOrUpdateEmpty(opt_extent);\n  return extendFlatCoordinates(extent, flatCoordinates, offset, end, stride);\n}\n\n/**\n * @param {Array<Array<import(\"./coordinate.js\").Coordinate>>} rings Rings.\n * @param {Extent=} opt_extent Extent.\n * @return {Extent} Extent.\n */\nexport function createOrUpdateFromRings(rings, opt_extent) {\n  var extent = createOrUpdateEmpty(opt_extent);\n  return extendRings(extent, rings);\n}\n\n\n/**\n * Determine if two extents are equivalent.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {boolean} The two extents are equivalent.\n * @api\n */\nexport function equals(extent1, extent2) {\n  return extent1[0] == extent2[0] && extent1[2] == extent2[2] &&\n      extent1[1] == extent2[1] && extent1[3] == extent2[3];\n}\n\n\n/**\n * Modify an extent to include another extent.\n * @param {Extent} extent1 The extent to be modified.\n * @param {Extent} extent2 The extent that will be included in the first.\n * @return {Extent} A reference to the first (extended) extent.\n * @api\n */\nexport function extend(extent1, extent2) {\n  if (extent2[0] < extent1[0]) {\n    extent1[0] = extent2[0];\n  }\n  if (extent2[2] > extent1[2]) {\n    extent1[2] = extent2[2];\n  }\n  if (extent2[1] < extent1[1]) {\n    extent1[1] = extent2[1];\n  }\n  if (extent2[3] > extent1[3]) {\n    extent1[3] = extent2[3];\n  }\n  return extent1;\n}\n\n\n/**\n * @param {Extent} extent Extent.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n */\nexport function extendCoordinate(extent, coordinate) {\n  if (coordinate[0] < extent[0]) {\n    extent[0] = coordinate[0];\n  }\n  if (coordinate[0] > extent[2]) {\n    extent[2] = coordinate[0];\n  }\n  if (coordinate[1] < extent[1]) {\n    extent[1] = coordinate[1];\n  }\n  if (coordinate[1] > extent[3]) {\n    extent[3] = coordinate[1];\n  }\n}\n\n\n/**\n * @param {Extent} extent Extent.\n * @param {Array<import(\"./coordinate.js\").Coordinate>} coordinates Coordinates.\n * @return {Extent} Extent.\n */\nexport function extendCoordinates(extent, coordinates) {\n  for (var i = 0, ii = coordinates.length; i < ii; ++i) {\n    extendCoordinate(extent, coordinates[i]);\n  }\n  return extent;\n}\n\n\n/**\n * @param {Extent} extent Extent.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {Extent} Extent.\n */\nexport function extendFlatCoordinates(extent, flatCoordinates, offset, end, stride) {\n  for (; offset < end; offset += stride) {\n    extendXY(extent, flatCoordinates[offset], flatCoordinates[offset + 1]);\n  }\n  return extent;\n}\n\n\n/**\n * @param {Extent} extent Extent.\n * @param {Array<Array<import(\"./coordinate.js\").Coordinate>>} rings Rings.\n * @return {Extent} Extent.\n */\nexport function extendRings(extent, rings) {\n  for (var i = 0, ii = rings.length; i < ii; ++i) {\n    extendCoordinates(extent, rings[i]);\n  }\n  return extent;\n}\n\n\n/**\n * @param {Extent} extent Extent.\n * @param {number} x X.\n * @param {number} y Y.\n */\nexport function extendXY(extent, x, y) {\n  extent[0] = Math.min(extent[0], x);\n  extent[1] = Math.min(extent[1], y);\n  extent[2] = Math.max(extent[2], x);\n  extent[3] = Math.max(extent[3], y);\n}\n\n\n/**\n * This function calls `callback` for each corner of the extent. If the\n * callback returns a truthy value the function returns that value\n * immediately. Otherwise the function returns `false`.\n * @param {Extent} extent Extent.\n * @param {function(this:T, import(\"./coordinate.js\").Coordinate): S} callback Callback.\n * @param {T=} opt_this Value to use as `this` when executing `callback`.\n * @return {S|boolean} Value.\n * @template S, T\n */\nexport function forEachCorner(extent, callback, opt_this) {\n  var val;\n  val = callback.call(opt_this, getBottomLeft(extent));\n  if (val) {\n    return val;\n  }\n  val = callback.call(opt_this, getBottomRight(extent));\n  if (val) {\n    return val;\n  }\n  val = callback.call(opt_this, getTopRight(extent));\n  if (val) {\n    return val;\n  }\n  val = callback.call(opt_this, getTopLeft(extent));\n  if (val) {\n    return val;\n  }\n  return false;\n}\n\n\n/**\n * Get the size of an extent.\n * @param {Extent} extent Extent.\n * @return {number} Area.\n * @api\n */\nexport function getArea(extent) {\n  var area = 0;\n  if (!isEmpty(extent)) {\n    area = getWidth(extent) * getHeight(extent);\n  }\n  return area;\n}\n\n\n/**\n * Get the bottom left coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Bottom left coordinate.\n * @api\n */\nexport function getBottomLeft(extent) {\n  return [extent[0], extent[1]];\n}\n\n\n/**\n * Get the bottom right coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Bottom right coordinate.\n * @api\n */\nexport function getBottomRight(extent) {\n  return [extent[2], extent[1]];\n}\n\n\n/**\n * Get the center coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Center.\n * @api\n */\nexport function getCenter(extent) {\n  return [(extent[0] + extent[2]) / 2, (extent[1] + extent[3]) / 2];\n}\n\n\n/**\n * Get a corner coordinate of an extent.\n * @param {Extent} extent Extent.\n * @param {Corner} corner Corner.\n * @return {import(\"./coordinate.js\").Coordinate} Corner coordinate.\n */\nexport function getCorner(extent, corner) {\n  var coordinate;\n  if (corner === Corner.BOTTOM_LEFT) {\n    coordinate = getBottomLeft(extent);\n  } else if (corner === Corner.BOTTOM_RIGHT) {\n    coordinate = getBottomRight(extent);\n  } else if (corner === Corner.TOP_LEFT) {\n    coordinate = getTopLeft(extent);\n  } else if (corner === Corner.TOP_RIGHT) {\n    coordinate = getTopRight(extent);\n  } else {\n    assert(false, 13); // Invalid corner\n  }\n  return coordinate;\n}\n\n\n/**\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {number} Enlarged area.\n */\nexport function getEnlargedArea(extent1, extent2) {\n  var minX = Math.min(extent1[0], extent2[0]);\n  var minY = Math.min(extent1[1], extent2[1]);\n  var maxX = Math.max(extent1[2], extent2[2]);\n  var maxY = Math.max(extent1[3], extent2[3]);\n  return (maxX - minX) * (maxY - minY);\n}\n\n\n/**\n * @param {import(\"./coordinate.js\").Coordinate} center Center.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {import(\"./size.js\").Size} size Size.\n * @param {Extent=} opt_extent Destination extent.\n * @return {Extent} Extent.\n */\nexport function getForViewAndSize(center, resolution, rotation, size, opt_extent) {\n  var dx = resolution * size[0] / 2;\n  var dy = resolution * size[1] / 2;\n  var cosRotation = Math.cos(rotation);\n  var sinRotation = Math.sin(rotation);\n  var xCos = dx * cosRotation;\n  var xSin = dx * sinRotation;\n  var yCos = dy * cosRotation;\n  var ySin = dy * sinRotation;\n  var x = center[0];\n  var y = center[1];\n  var x0 = x - xCos + ySin;\n  var x1 = x - xCos - ySin;\n  var x2 = x + xCos - ySin;\n  var x3 = x + xCos + ySin;\n  var y0 = y - xSin - yCos;\n  var y1 = y - xSin + yCos;\n  var y2 = y + xSin + yCos;\n  var y3 = y + xSin - yCos;\n  return createOrUpdate(\n    Math.min(x0, x1, x2, x3), Math.min(y0, y1, y2, y3),\n    Math.max(x0, x1, x2, x3), Math.max(y0, y1, y2, y3),\n    opt_extent);\n}\n\n\n/**\n * Get the height of an extent.\n * @param {Extent} extent Extent.\n * @return {number} Height.\n * @api\n */\nexport function getHeight(extent) {\n  return extent[3] - extent[1];\n}\n\n\n/**\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @return {number} Intersection area.\n */\nexport function getIntersectionArea(extent1, extent2) {\n  var intersection = getIntersection(extent1, extent2);\n  return getArea(intersection);\n}\n\n\n/**\n * Get the intersection of two extents.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent 2.\n * @param {Extent=} opt_extent Optional extent to populate with intersection.\n * @return {Extent} Intersecting extent.\n * @api\n */\nexport function getIntersection(extent1, extent2, opt_extent) {\n  var intersection = opt_extent ? opt_extent : createEmpty();\n  if (intersects(extent1, extent2)) {\n    if (extent1[0] > extent2[0]) {\n      intersection[0] = extent1[0];\n    } else {\n      intersection[0] = extent2[0];\n    }\n    if (extent1[1] > extent2[1]) {\n      intersection[1] = extent1[1];\n    } else {\n      intersection[1] = extent2[1];\n    }\n    if (extent1[2] < extent2[2]) {\n      intersection[2] = extent1[2];\n    } else {\n      intersection[2] = extent2[2];\n    }\n    if (extent1[3] < extent2[3]) {\n      intersection[3] = extent1[3];\n    } else {\n      intersection[3] = extent2[3];\n    }\n  } else {\n    createOrUpdateEmpty(intersection);\n  }\n  return intersection;\n}\n\n\n/**\n * @param {Extent} extent Extent.\n * @return {number} Margin.\n */\nexport function getMargin(extent) {\n  return getWidth(extent) + getHeight(extent);\n}\n\n\n/**\n * Get the size (width, height) of an extent.\n * @param {Extent} extent The extent.\n * @return {import(\"./size.js\").Size} The extent size.\n * @api\n */\nexport function getSize(extent) {\n  return [extent[2] - extent[0], extent[3] - extent[1]];\n}\n\n\n/**\n * Get the top left coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Top left coordinate.\n * @api\n */\nexport function getTopLeft(extent) {\n  return [extent[0], extent[3]];\n}\n\n\n/**\n * Get the top right coordinate of an extent.\n * @param {Extent} extent Extent.\n * @return {import(\"./coordinate.js\").Coordinate} Top right coordinate.\n * @api\n */\nexport function getTopRight(extent) {\n  return [extent[2], extent[3]];\n}\n\n\n/**\n * Get the width of an extent.\n * @param {Extent} extent Extent.\n * @return {number} Width.\n * @api\n */\nexport function getWidth(extent) {\n  return extent[2] - extent[0];\n}\n\n\n/**\n * Determine if one extent intersects another.\n * @param {Extent} extent1 Extent 1.\n * @param {Extent} extent2 Extent.\n * @return {boolean} The two extents intersect.\n * @api\n */\nexport function intersects(extent1, extent2) {\n  return extent1[0] <= extent2[2] &&\n      extent1[2] >= extent2[0] &&\n      extent1[1] <= extent2[3] &&\n      extent1[3] >= extent2[1];\n}\n\n\n/**\n * Determine if an extent is empty.\n * @param {Extent} extent Extent.\n * @return {boolean} Is empty.\n * @api\n */\nexport function isEmpty(extent) {\n  return extent[2] < extent[0] || extent[3] < extent[1];\n}\n\n\n/**\n * @param {Extent} extent Extent.\n * @param {Extent=} opt_extent Extent.\n * @return {Extent} Extent.\n */\nexport function returnOrUpdate(extent, opt_extent) {\n  if (opt_extent) {\n    opt_extent[0] = extent[0];\n    opt_extent[1] = extent[1];\n    opt_extent[2] = extent[2];\n    opt_extent[3] = extent[3];\n    return opt_extent;\n  } else {\n    return extent;\n  }\n}\n\n\n/**\n * @param {Extent} extent Extent.\n * @param {number} value Value.\n */\nexport function scaleFromCenter(extent, value) {\n  var deltaX = ((extent[2] - extent[0]) / 2) * (value - 1);\n  var deltaY = ((extent[3] - extent[1]) / 2) * (value - 1);\n  extent[0] -= deltaX;\n  extent[2] += deltaX;\n  extent[1] -= deltaY;\n  extent[3] += deltaY;\n}\n\n\n/**\n * Determine if the segment between two coordinates intersects (crosses,\n * touches, or is contained by) the provided extent.\n * @param {Extent} extent The extent.\n * @param {import(\"./coordinate.js\").Coordinate} start Segment start coordinate.\n * @param {import(\"./coordinate.js\").Coordinate} end Segment end coordinate.\n * @return {boolean} The segment intersects the extent.\n */\nexport function intersectsSegment(extent, start, end) {\n  var intersects = false;\n  var startRel = coordinateRelationship(extent, start);\n  var endRel = coordinateRelationship(extent, end);\n  if (startRel === Relationship.INTERSECTING ||\n      endRel === Relationship.INTERSECTING) {\n    intersects = true;\n  } else {\n    var minX = extent[0];\n    var minY = extent[1];\n    var maxX = extent[2];\n    var maxY = extent[3];\n    var startX = start[0];\n    var startY = start[1];\n    var endX = end[0];\n    var endY = end[1];\n    var slope = (endY - startY) / (endX - startX);\n    var x, y;\n    if (!!(endRel & Relationship.ABOVE) &&\n        !(startRel & Relationship.ABOVE)) {\n      // potentially intersects top\n      x = endX - ((endY - maxY) / slope);\n      intersects = x >= minX && x <= maxX;\n    }\n    if (!intersects && !!(endRel & Relationship.RIGHT) &&\n        !(startRel & Relationship.RIGHT)) {\n      // potentially intersects right\n      y = endY - ((endX - maxX) * slope);\n      intersects = y >= minY && y <= maxY;\n    }\n    if (!intersects && !!(endRel & Relationship.BELOW) &&\n        !(startRel & Relationship.BELOW)) {\n      // potentially intersects bottom\n      x = endX - ((endY - minY) / slope);\n      intersects = x >= minX && x <= maxX;\n    }\n    if (!intersects && !!(endRel & Relationship.LEFT) &&\n        !(startRel & Relationship.LEFT)) {\n      // potentially intersects left\n      y = endY - ((endX - minX) * slope);\n      intersects = y >= minY && y <= maxY;\n    }\n\n  }\n  return intersects;\n}\n\n\n/**\n * Apply a transform function to the extent.\n * @param {Extent} extent Extent.\n * @param {import(\"./proj.js\").TransformFunction} transformFn Transform function.\n * Called with `[minX, minY, maxX, maxY]` extent coordinates.\n * @param {Extent=} opt_extent Destination extent.\n * @return {Extent} Extent.\n * @api\n */\nexport function applyTransform(extent, transformFn, opt_extent) {\n  var coordinates = [\n    extent[0], extent[1],\n    extent[0], extent[3],\n    extent[2], extent[1],\n    extent[2], extent[3]\n  ];\n  transformFn(coordinates, coordinates, 2);\n  var xs = [coordinates[0], coordinates[2], coordinates[4], coordinates[6]];\n  var ys = [coordinates[1], coordinates[3], coordinates[5], coordinates[7]];\n  return _boundingExtentXYs(xs, ys, opt_extent);\n}\n\n//# sourceMappingURL=extent.js.map","/**\n * @module ol/geom/GeometryType\n */\n\n/**\n * The geometry type. One of `'Point'`, `'LineString'`, `'LinearRing'`,\n * `'Polygon'`, `'MultiPoint'`, `'MultiLineString'`, `'MultiPolygon'`,\n * `'GeometryCollection'`, `'Circle'`.\n * @enum {string}\n */\nexport default {\n  POINT: 'Point',\n  LINE_STRING: 'LineString',\n  LINEAR_RING: 'LinearRing',\n  POLYGON: 'Polygon',\n  MULTI_POINT: 'MultiPoint',\n  MULTI_LINE_STRING: 'MultiLineString',\n  MULTI_POLYGON: 'MultiPolygon',\n  GEOMETRY_COLLECTION: 'GeometryCollection',\n  CIRCLE: 'Circle'\n};\n\n//# sourceMappingURL=GeometryType.js.map","/**\n * @module ol/geom/GeometryLayout\n */\n\n/**\n * The coordinate layout for geometries, indicating whether a 3rd or 4th z ('Z')\n * or measure ('M') coordinate is available. Supported values are `'XY'`,\n * `'XYZ'`, `'XYM'`, `'XYZM'`.\n * @enum {string}\n */\nexport default {\n  XY: 'XY',\n  XYZ: 'XYZ',\n  XYM: 'XYM',\n  XYZM: 'XYZM'\n};\n\n//# sourceMappingURL=GeometryLayout.js.map","/**\n * @module ol/geom/flat/transform\n */\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../transform.js\").Transform} transform Transform.\n * @param {Array<number>=} opt_dest Destination.\n * @return {Array<number>} Transformed coordinates.\n */\nexport function transform2D(flatCoordinates, offset, end, stride, transform, opt_dest) {\n  var dest = opt_dest ? opt_dest : [];\n  var i = 0;\n  for (var j = offset; j < end; j += stride) {\n    var x = flatCoordinates[j];\n    var y = flatCoordinates[j + 1];\n    dest[i++] = transform[0] * x + transform[2] * y + transform[4];\n    dest[i++] = transform[1] * x + transform[3] * y + transform[5];\n  }\n  if (opt_dest && dest.length != i) {\n    dest.length = i;\n  }\n  return dest;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} angle Angle.\n * @param {Array<number>} anchor Rotation anchor point.\n * @param {Array<number>=} opt_dest Destination.\n * @return {Array<number>} Transformed coordinates.\n */\nexport function rotate(flatCoordinates, offset, end, stride, angle, anchor, opt_dest) {\n  var dest = opt_dest ? opt_dest : [];\n  var cos = Math.cos(angle);\n  var sin = Math.sin(angle);\n  var anchorX = anchor[0];\n  var anchorY = anchor[1];\n  var i = 0;\n  for (var j = offset; j < end; j += stride) {\n    var deltaX = flatCoordinates[j] - anchorX;\n    var deltaY = flatCoordinates[j + 1] - anchorY;\n    dest[i++] = anchorX + deltaX * cos - deltaY * sin;\n    dest[i++] = anchorY + deltaX * sin + deltaY * cos;\n    for (var k = j + 2; k < j + stride; ++k) {\n      dest[i++] = flatCoordinates[k];\n    }\n  }\n  if (opt_dest && dest.length != i) {\n    dest.length = i;\n  }\n  return dest;\n}\n\n\n/**\n * Scale the coordinates.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} sx Scale factor in the x-direction.\n * @param {number} sy Scale factor in the y-direction.\n * @param {Array<number>} anchor Scale anchor point.\n * @param {Array<number>=} opt_dest Destination.\n * @return {Array<number>} Transformed coordinates.\n */\nexport function scale(flatCoordinates, offset, end, stride, sx, sy, anchor, opt_dest) {\n  var dest = opt_dest ? opt_dest : [];\n  var anchorX = anchor[0];\n  var anchorY = anchor[1];\n  var i = 0;\n  for (var j = offset; j < end; j += stride) {\n    var deltaX = flatCoordinates[j] - anchorX;\n    var deltaY = flatCoordinates[j + 1] - anchorY;\n    dest[i++] = anchorX + sx * deltaX;\n    dest[i++] = anchorY + sy * deltaY;\n    for (var k = j + 2; k < j + stride; ++k) {\n      dest[i++] = flatCoordinates[k];\n    }\n  }\n  if (opt_dest && dest.length != i) {\n    dest.length = i;\n  }\n  return dest;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} deltaX Delta X.\n * @param {number} deltaY Delta Y.\n * @param {Array<number>=} opt_dest Destination.\n * @return {Array<number>} Transformed coordinates.\n */\nexport function translate(flatCoordinates, offset, end, stride, deltaX, deltaY, opt_dest) {\n  var dest = opt_dest ? opt_dest : [];\n  var i = 0;\n  for (var j = offset; j < end; j += stride) {\n    dest[i++] = flatCoordinates[j] + deltaX;\n    dest[i++] = flatCoordinates[j + 1] + deltaY;\n    for (var k = j + 2; k < j + stride; ++k) {\n      dest[i++] = flatCoordinates[k];\n    }\n  }\n  if (opt_dest && dest.length != i) {\n    dest.length = i;\n  }\n  return dest;\n}\n\n//# sourceMappingURL=transform.js.map","/**\n * @license\n * Latitude/longitude spherical geodesy formulae taken from\n * http://www.movable-type.co.uk/scripts/latlong.html\n * Licensed under CC-BY-3.0.\n */\n\n/**\n * @module ol/sphere\n */\nimport {toRadians, toDegrees} from './math.js';\nimport GeometryType from './geom/GeometryType.js';\n\n\n/**\n * Object literal with options for the {@link getLength} or {@link getArea}\n * functions.\n * @typedef {Object} SphereMetricOptions\n * @property {import(\"./proj.js\").ProjectionLike} [projection='EPSG:3857']\n * Projection of the  geometry.  By default, the geometry is assumed to be in\n * Web Mercator.\n * @property {number} [radius=6371008.8] Sphere radius.  By default, the radius of the\n * earth is used (Clarke 1866 Authalic Sphere).\n */\n\n\n/**\n * The mean Earth radius (1/3 * (2a + b)) for the WGS84 ellipsoid.\n * https://en.wikipedia.org/wiki/Earth_radius#Mean_radius\n * @type {number}\n */\nexport var DEFAULT_RADIUS = 6371008.8;\n\n\n/**\n * Get the great circle distance (in meters) between two geographic coordinates.\n * @param {Array} c1 Starting coordinate.\n * @param {Array} c2 Ending coordinate.\n * @param {number=} opt_radius The sphere radius to use.  Defaults to the Earth's\n *     mean radius using the WGS84 ellipsoid.\n * @return {number} The great circle distance between the points (in meters).\n * @api\n */\nexport function getDistance(c1, c2, opt_radius) {\n  var radius = opt_radius || DEFAULT_RADIUS;\n  var lat1 = toRadians(c1[1]);\n  var lat2 = toRadians(c2[1]);\n  var deltaLatBy2 = (lat2 - lat1) / 2;\n  var deltaLonBy2 = toRadians(c2[0] - c1[0]) / 2;\n  var a = Math.sin(deltaLatBy2) * Math.sin(deltaLatBy2) +\n      Math.sin(deltaLonBy2) * Math.sin(deltaLonBy2) *\n      Math.cos(lat1) * Math.cos(lat2);\n  return 2 * radius * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));\n}\n\n\n/**\n * Get the cumulative great circle length of linestring coordinates (geographic).\n * @param {Array} coordinates Linestring coordinates.\n * @param {number} radius The sphere radius to use.\n * @return {number} The length (in meters).\n */\nfunction getLengthInternal(coordinates, radius) {\n  var length = 0;\n  for (var i = 0, ii = coordinates.length; i < ii - 1; ++i) {\n    length += getDistance(coordinates[i], coordinates[i + 1], radius);\n  }\n  return length;\n}\n\n\n/**\n * Get the spherical length of a geometry.  This length is the sum of the\n * great circle distances between coordinates.  For polygons, the length is\n * the sum of all rings.  For points, the length is zero.  For multi-part\n * geometries, the length is the sum of the length of each part.\n * @param {import(\"./geom/Geometry.js\").default} geometry A geometry.\n * @param {SphereMetricOptions=} opt_options Options for the\n * length calculation.  By default, geometries are assumed to be in 'EPSG:3857'.\n * You can change this by providing a `projection` option.\n * @return {number} The spherical length (in meters).\n * @api\n */\nexport function getLength(geometry, opt_options) {\n  var options = opt_options || {};\n  var radius = options.radius || DEFAULT_RADIUS;\n  var projection = options.projection || 'EPSG:3857';\n  var type = geometry.getType();\n  if (type !== GeometryType.GEOMETRY_COLLECTION) {\n    geometry = geometry.clone().transform(projection, 'EPSG:4326');\n  }\n  var length = 0;\n  var coordinates, coords, i, ii, j, jj;\n  switch (type) {\n    case GeometryType.POINT:\n    case GeometryType.MULTI_POINT: {\n      break;\n    }\n    case GeometryType.LINE_STRING:\n    case GeometryType.LINEAR_RING: {\n      coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (geometry).getCoordinates();\n      length = getLengthInternal(coordinates, radius);\n      break;\n    }\n    case GeometryType.MULTI_LINE_STRING:\n    case GeometryType.POLYGON: {\n      coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (geometry).getCoordinates();\n      for (i = 0, ii = coordinates.length; i < ii; ++i) {\n        length += getLengthInternal(coordinates[i], radius);\n      }\n      break;\n    }\n    case GeometryType.MULTI_POLYGON: {\n      coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (geometry).getCoordinates();\n      for (i = 0, ii = coordinates.length; i < ii; ++i) {\n        coords = coordinates[i];\n        for (j = 0, jj = coords.length; j < jj; ++j) {\n          length += getLengthInternal(coords[j], radius);\n        }\n      }\n      break;\n    }\n    case GeometryType.GEOMETRY_COLLECTION: {\n      var geometries = /** @type {import(\"./geom/GeometryCollection.js\").default} */ (geometry).getGeometries();\n      for (i = 0, ii = geometries.length; i < ii; ++i) {\n        length += getLength(geometries[i], opt_options);\n      }\n      break;\n    }\n    default: {\n      throw new Error('Unsupported geometry type: ' + type);\n    }\n  }\n  return length;\n}\n\n\n/**\n * Returns the spherical area for a list of coordinates.\n *\n * [Reference](https://trs-new.jpl.nasa.gov/handle/2014/40409)\n * Robert. G. Chamberlain and William H. Duquette, \"Some Algorithms for\n * Polygons on a Sphere\", JPL Publication 07-03, Jet Propulsion\n * Laboratory, Pasadena, CA, June 2007\n *\n * @param {Array<import(\"./coordinate.js\").Coordinate>} coordinates List of coordinates of a linear\n * ring. If the ring is oriented clockwise, the area will be positive,\n * otherwise it will be negative.\n * @param {number} radius The sphere radius.\n * @return {number} Area (in square meters).\n */\nfunction getAreaInternal(coordinates, radius) {\n  var area = 0;\n  var len = coordinates.length;\n  var x1 = coordinates[len - 1][0];\n  var y1 = coordinates[len - 1][1];\n  for (var i = 0; i < len; i++) {\n    var x2 = coordinates[i][0];\n    var y2 = coordinates[i][1];\n    area += toRadians(x2 - x1) *\n        (2 + Math.sin(toRadians(y1)) +\n        Math.sin(toRadians(y2)));\n    x1 = x2;\n    y1 = y2;\n  }\n  return area * radius * radius / 2.0;\n}\n\n\n/**\n * Get the spherical area of a geometry.  This is the area (in meters) assuming\n * that polygon edges are segments of great circles on a sphere.\n * @param {import(\"./geom/Geometry.js\").default} geometry A geometry.\n * @param {SphereMetricOptions=} opt_options Options for the area\n *     calculation.  By default, geometries are assumed to be in 'EPSG:3857'.\n *     You can change this by providing a `projection` option.\n * @return {number} The spherical area (in square meters).\n * @api\n */\nexport function getArea(geometry, opt_options) {\n  var options = opt_options || {};\n  var radius = options.radius || DEFAULT_RADIUS;\n  var projection = options.projection || 'EPSG:3857';\n  var type = geometry.getType();\n  if (type !== GeometryType.GEOMETRY_COLLECTION) {\n    geometry = geometry.clone().transform(projection, 'EPSG:4326');\n  }\n  var area = 0;\n  var coordinates, coords, i, ii, j, jj;\n  switch (type) {\n    case GeometryType.POINT:\n    case GeometryType.MULTI_POINT:\n    case GeometryType.LINE_STRING:\n    case GeometryType.MULTI_LINE_STRING:\n    case GeometryType.LINEAR_RING: {\n      break;\n    }\n    case GeometryType.POLYGON: {\n      coordinates = /** @type {import(\"./geom/Polygon.js\").default} */ (geometry).getCoordinates();\n      area = Math.abs(getAreaInternal(coordinates[0], radius));\n      for (i = 1, ii = coordinates.length; i < ii; ++i) {\n        area -= Math.abs(getAreaInternal(coordinates[i], radius));\n      }\n      break;\n    }\n    case GeometryType.MULTI_POLYGON: {\n      coordinates = /** @type {import(\"./geom/SimpleGeometry.js\").default} */ (geometry).getCoordinates();\n      for (i = 0, ii = coordinates.length; i < ii; ++i) {\n        coords = coordinates[i];\n        area += Math.abs(getAreaInternal(coords[0], radius));\n        for (j = 1, jj = coords.length; j < jj; ++j) {\n          area -= Math.abs(getAreaInternal(coords[j], radius));\n        }\n      }\n      break;\n    }\n    case GeometryType.GEOMETRY_COLLECTION: {\n      var geometries = /** @type {import(\"./geom/GeometryCollection.js\").default} */ (geometry).getGeometries();\n      for (i = 0, ii = geometries.length; i < ii; ++i) {\n        area += getArea(geometries[i], opt_options);\n      }\n      break;\n    }\n    default: {\n      throw new Error('Unsupported geometry type: ' + type);\n    }\n  }\n  return area;\n}\n\n\n/**\n * Returns the coordinate at the given distance and bearing from `c1`.\n *\n * @param {import(\"./coordinate.js\").Coordinate} c1 The origin point (`[lon, lat]` in degrees).\n * @param {number} distance The great-circle distance between the origin\n *     point and the target point.\n * @param {number} bearing The bearing (in radians).\n * @param {number=} opt_radius The sphere radius to use.  Defaults to the Earth's\n *     mean radius using the WGS84 ellipsoid.\n * @return {import(\"./coordinate.js\").Coordinate} The target point.\n */\nexport function offset(c1, distance, bearing, opt_radius) {\n  var radius = opt_radius || DEFAULT_RADIUS;\n  var lat1 = toRadians(c1[1]);\n  var lon1 = toRadians(c1[0]);\n  var dByR = distance / radius;\n  var lat = Math.asin(\n    Math.sin(lat1) * Math.cos(dByR) +\n      Math.cos(lat1) * Math.sin(dByR) * Math.cos(bearing));\n  var lon = lon1 + Math.atan2(\n    Math.sin(bearing) * Math.sin(dByR) * Math.cos(lat1),\n    Math.cos(dByR) - Math.sin(lat1) * Math.sin(lat));\n  return [toDegrees(lon), toDegrees(lat)];\n}\n\n//# sourceMappingURL=sphere.js.map","/**\n * @module ol/proj/Units\n */\n\n/**\n * Projection units: `'degrees'`, `'ft'`, `'m'`, `'pixels'`, `'tile-pixels'` or\n * `'us-ft'`.\n * @enum {string}\n */\nvar Units = {\n  DEGREES: 'degrees',\n  FEET: 'ft',\n  METERS: 'm',\n  PIXELS: 'pixels',\n  TILE_PIXELS: 'tile-pixels',\n  USFEET: 'us-ft'\n};\n\n\n/**\n * Meters per unit lookup table.\n * @const\n * @type {Object<Units, number>}\n * @api\n */\nexport var METERS_PER_UNIT = {};\n// use the radius of the Normal sphere\nMETERS_PER_UNIT[Units.DEGREES] = 2 * Math.PI * 6370997 / 360;\nMETERS_PER_UNIT[Units.FEET] = 0.3048;\nMETERS_PER_UNIT[Units.METERS] = 1;\nMETERS_PER_UNIT[Units.USFEET] = 1200 / 3937;\n\nexport default Units;\n\n//# sourceMappingURL=Units.js.map","/**\n * @module ol/proj/Projection\n */\nimport {METERS_PER_UNIT} from './Units.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {string} code The SRS identifier code, e.g. `EPSG:4326`.\n * @property {import(\"./Units.js\").default|string} [units] Units. Required unless a\n * proj4 projection is defined for `code`.\n * @property {import(\"../extent.js\").Extent} [extent] The validity extent for the SRS.\n * @property {string} [axisOrientation='enu'] The axis orientation as specified in Proj4.\n * @property {boolean} [global=false] Whether the projection is valid for the whole globe.\n * @property {number} [metersPerUnit] The meters per unit for the SRS.\n * If not provided, the `units` are used to get the meters per unit from the {@link module:ol/proj/Units~METERS_PER_UNIT}\n * lookup table.\n * @property {import(\"../extent.js\").Extent} [worldExtent] The world extent for the SRS.\n * @property {function(number, import(\"../coordinate.js\").Coordinate):number} [getPointResolution]\n * Function to determine resolution at a point. The function is called with a\n * `{number}` view resolution and an `{import(\"../coordinate.js\").Coordinate}` as arguments, and returns\n * the `{number}` resolution at the passed coordinate. If this is `undefined`,\n * the default {@link module:ol/proj#getPointResolution} function will be used.\n */\n\n\n/**\n * @classdesc\n * Projection definition class. One of these is created for each projection\n * supported in the application and stored in the {@link module:ol/proj} namespace.\n * You can use these in applications, but this is not required, as API params\n * and options use {@link module:ol/proj~ProjectionLike} which means the simple string\n * code will suffice.\n *\n * You can use {@link module:ol/proj~get} to retrieve the object for a particular\n * projection.\n *\n * The library includes definitions for `EPSG:4326` and `EPSG:3857`, together\n * with the following aliases:\n * * `EPSG:4326`: CRS:84, urn:ogc:def:crs:EPSG:6.6:4326,\n *     urn:ogc:def:crs:OGC:1.3:CRS84, urn:ogc:def:crs:OGC:2:84,\n *     http://www.opengis.net/gml/srs/epsg.xml#4326,\n *     urn:x-ogc:def:crs:EPSG:4326\n * * `EPSG:3857`: EPSG:102100, EPSG:102113, EPSG:900913,\n *     urn:ogc:def:crs:EPSG:6.18:3:3857,\n *     http://www.opengis.net/gml/srs/epsg.xml#3857\n *\n * If you use [proj4js](https://github.com/proj4js/proj4js), aliases can\n * be added using `proj4.defs()`. After all required projection definitions are\n * added, call the {@link module:ol/proj/proj4~register} function.\n *\n * @api\n */\nvar Projection = function Projection(options) {\n  /**\n   * @private\n   * @type {string}\n   */\n  this.code_ = options.code;\n\n  /**\n   * Units of projected coordinates. When set to `TILE_PIXELS`, a\n   * `this.extent_` and `this.worldExtent_` must be configured properly for each\n   * tile.\n   * @private\n   * @type {import(\"./Units.js\").default}\n   */\n  this.units_ = /** @type {import(\"./Units.js\").default} */ (options.units);\n\n  /**\n   * Validity extent of the projection in projected coordinates. For projections\n   * with `TILE_PIXELS` units, this is the extent of the tile in\n   * tile pixel space.\n   * @private\n   * @type {import(\"../extent.js\").Extent}\n   */\n  this.extent_ = options.extent !== undefined ? options.extent : null;\n\n  /**\n   * Extent of the world in EPSG:4326. For projections with\n   * `TILE_PIXELS` units, this is the extent of the tile in\n   * projected coordinate space.\n   * @private\n   * @type {import(\"../extent.js\").Extent}\n   */\n  this.worldExtent_ = options.worldExtent !== undefined ?\n    options.worldExtent : null;\n\n  /**\n   * @private\n   * @type {string}\n   */\n  this.axisOrientation_ = options.axisOrientation !== undefined ?\n    options.axisOrientation : 'enu';\n\n  /**\n   * @private\n   * @type {boolean}\n   */\n  this.global_ = options.global !== undefined ? options.global : false;\n\n  /**\n   * @private\n   * @type {boolean}\n   */\n  this.canWrapX_ = !!(this.global_ && this.extent_);\n\n  /**\n   * @private\n   * @type {function(number, import(\"../coordinate.js\").Coordinate):number|undefined}\n   */\n  this.getPointResolutionFunc_ = options.getPointResolution;\n\n  /**\n   * @private\n   * @type {import(\"../tilegrid/TileGrid.js\").default}\n   */\n  this.defaultTileGrid_ = null;\n\n  /**\n   * @private\n   * @type {number|undefined}\n   */\n  this.metersPerUnit_ = options.metersPerUnit;\n};\n\n/**\n * @return {boolean} The projection is suitable for wrapping the x-axis\n */\nProjection.prototype.canWrapX = function canWrapX () {\n  return this.canWrapX_;\n};\n\n/**\n * Get the code for this projection, e.g. 'EPSG:4326'.\n * @return {string} Code.\n * @api\n */\nProjection.prototype.getCode = function getCode () {\n  return this.code_;\n};\n\n/**\n * Get the validity extent for this projection.\n * @return {import(\"../extent.js\").Extent} Extent.\n * @api\n */\nProjection.prototype.getExtent = function getExtent () {\n  return this.extent_;\n};\n\n/**\n * Get the units of this projection.\n * @return {import(\"./Units.js\").default} Units.\n * @api\n */\nProjection.prototype.getUnits = function getUnits () {\n  return this.units_;\n};\n\n/**\n * Get the amount of meters per unit of this projection.If the projection is\n * not configured with `metersPerUnit` or a units identifier, the return is\n * `undefined`.\n * @return {number|undefined} Meters.\n * @api\n */\nProjection.prototype.getMetersPerUnit = function getMetersPerUnit () {\n  return this.metersPerUnit_ || METERS_PER_UNIT[this.units_];\n};\n\n/**\n * Get the world extent for this projection.\n * @return {import(\"../extent.js\").Extent} Extent.\n * @api\n */\nProjection.prototype.getWorldExtent = function getWorldExtent () {\n  return this.worldExtent_;\n};\n\n/**\n * Get the axis orientation of this projection.\n * Example values are:\n * enu - the default easting, northing, elevation.\n * neu - northing, easting, up - useful for \"lat/long\" geographic coordinates,\n *   or south orientated transverse mercator.\n * wnu - westing, northing, up - some planetary coordinate systems have\n *   \"west positive\" coordinate systems\n * @return {string} Axis orientation.\n * @api\n */\nProjection.prototype.getAxisOrientation = function getAxisOrientation () {\n  return this.axisOrientation_;\n};\n\n/**\n * Is this projection a global projection which spans the whole world?\n * @return {boolean} Whether the projection is global.\n * @api\n */\nProjection.prototype.isGlobal = function isGlobal () {\n  return this.global_;\n};\n\n/**\n * Set if the projection is a global projection which spans the whole world\n * @param {boolean} global Whether the projection is global.\n * @api\n */\nProjection.prototype.setGlobal = function setGlobal (global) {\n  this.global_ = global;\n  this.canWrapX_ = !!(global && this.extent_);\n};\n\n/**\n * @return {import(\"../tilegrid/TileGrid.js\").default} The default tile grid.\n */\nProjection.prototype.getDefaultTileGrid = function getDefaultTileGrid () {\n  return this.defaultTileGrid_;\n};\n\n/**\n * @param {import(\"../tilegrid/TileGrid.js\").default} tileGrid The default tile grid.\n */\nProjection.prototype.setDefaultTileGrid = function setDefaultTileGrid (tileGrid) {\n  this.defaultTileGrid_ = tileGrid;\n};\n\n/**\n * Set the validity extent for this projection.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @api\n */\nProjection.prototype.setExtent = function setExtent (extent) {\n  this.extent_ = extent;\n  this.canWrapX_ = !!(this.global_ && extent);\n};\n\n/**\n * Set the world extent for this projection.\n * @param {import(\"../extent.js\").Extent} worldExtent World extent\n *   [minlon, minlat, maxlon, maxlat].\n * @api\n */\nProjection.prototype.setWorldExtent = function setWorldExtent (worldExtent) {\n  this.worldExtent_ = worldExtent;\n};\n\n/**\n * Set the getPointResolution function (see {@link module:ol/proj~getPointResolution}\n * for this projection.\n * @param {function(number, import(\"../coordinate.js\").Coordinate):number} func Function\n * @api\n */\nProjection.prototype.setGetPointResolution = function setGetPointResolution (func) {\n  this.getPointResolutionFunc_ = func;\n};\n\n/**\n * Get the custom point resolution function for this projection (if set).\n * @return {function(number, import(\"../coordinate.js\").Coordinate):number|undefined} The custom point\n * resolution function (if set).\n */\nProjection.prototype.getPointResolutionFunc = function getPointResolutionFunc () {\n  return this.getPointResolutionFunc_;\n};\n\nexport default Projection;\n\n//# sourceMappingURL=Projection.js.map","/**\n * @module ol/proj/epsg3857\n */\nimport {cosh} from '../math.js';\nimport Projection from './Projection.js';\nimport Units from './Units.js';\n\n\n/**\n * Radius of WGS84 sphere\n *\n * @const\n * @type {number}\n */\nexport var RADIUS = 6378137;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var HALF_SIZE = Math.PI * RADIUS;\n\n\n/**\n * @const\n * @type {import(\"../extent.js\").Extent}\n */\nexport var EXTENT = [\n  -HALF_SIZE, -HALF_SIZE,\n  HALF_SIZE, HALF_SIZE\n];\n\n\n/**\n * @const\n * @type {import(\"../extent.js\").Extent}\n */\nexport var WORLD_EXTENT = [-180, -85, 180, 85];\n\n\n/**\n * @classdesc\n * Projection object for web/spherical Mercator (EPSG:3857).\n */\nvar EPSG3857Projection = /*@__PURE__*/(function (Projection) {\n  function EPSG3857Projection(code) {\n    Projection.call(this, {\n      code: code,\n      units: Units.METERS,\n      extent: EXTENT,\n      global: true,\n      worldExtent: WORLD_EXTENT,\n      getPointResolution: function(resolution, point) {\n        return resolution / cosh(point[1] / RADIUS);\n      }\n    });\n\n  }\n\n  if ( Projection ) EPSG3857Projection.__proto__ = Projection;\n  EPSG3857Projection.prototype = Object.create( Projection && Projection.prototype );\n  EPSG3857Projection.prototype.constructor = EPSG3857Projection;\n\n  return EPSG3857Projection;\n}(Projection));\n\n\n/**\n * Projections equal to EPSG:3857.\n *\n * @const\n * @type {Array<import(\"./Projection.js\").default>}\n */\nexport var PROJECTIONS = [\n  new EPSG3857Projection('EPSG:3857'),\n  new EPSG3857Projection('EPSG:102100'),\n  new EPSG3857Projection('EPSG:102113'),\n  new EPSG3857Projection('EPSG:900913'),\n  new EPSG3857Projection('urn:ogc:def:crs:EPSG:6.18:3:3857'),\n  new EPSG3857Projection('urn:ogc:def:crs:EPSG::3857'),\n  new EPSG3857Projection('http://www.opengis.net/gml/srs/epsg.xml#3857')\n];\n\n\n/**\n * Transformation from EPSG:4326 to EPSG:3857.\n *\n * @param {Array<number>} input Input array of coordinate values.\n * @param {Array<number>=} opt_output Output array of coordinate values.\n * @param {number=} opt_dimension Dimension (default is `2`).\n * @return {Array<number>} Output array of coordinate values.\n */\nexport function fromEPSG4326(input, opt_output, opt_dimension) {\n  var length = input.length;\n  var dimension = opt_dimension > 1 ? opt_dimension : 2;\n  var output = opt_output;\n  if (output === undefined) {\n    if (dimension > 2) {\n      // preserve values beyond second dimension\n      output = input.slice();\n    } else {\n      output = new Array(length);\n    }\n  }\n  var halfSize = HALF_SIZE;\n  for (var i = 0; i < length; i += dimension) {\n    output[i] = halfSize * input[i] / 180;\n    var y = RADIUS *\n        Math.log(Math.tan(Math.PI * (input[i + 1] + 90) / 360));\n    if (y > halfSize) {\n      y = halfSize;\n    } else if (y < -halfSize) {\n      y = -halfSize;\n    }\n    output[i + 1] = y;\n  }\n  return output;\n}\n\n\n/**\n * Transformation from EPSG:3857 to EPSG:4326.\n *\n * @param {Array<number>} input Input array of coordinate values.\n * @param {Array<number>=} opt_output Output array of coordinate values.\n * @param {number=} opt_dimension Dimension (default is `2`).\n * @return {Array<number>} Output array of coordinate values.\n */\nexport function toEPSG4326(input, opt_output, opt_dimension) {\n  var length = input.length;\n  var dimension = opt_dimension > 1 ? opt_dimension : 2;\n  var output = opt_output;\n  if (output === undefined) {\n    if (dimension > 2) {\n      // preserve values beyond second dimension\n      output = input.slice();\n    } else {\n      output = new Array(length);\n    }\n  }\n  for (var i = 0; i < length; i += dimension) {\n    output[i] = 180 * input[i] / HALF_SIZE;\n    output[i + 1] = 360 * Math.atan(\n      Math.exp(input[i + 1] / RADIUS)) / Math.PI - 90;\n  }\n  return output;\n}\n\n//# sourceMappingURL=epsg3857.js.map","/**\n * @module ol/proj/epsg4326\n */\nimport Projection from './Projection.js';\nimport Units from './Units.js';\n\n\n/**\n * Semi-major radius of the WGS84 ellipsoid.\n *\n * @const\n * @type {number}\n */\nexport var RADIUS = 6378137;\n\n\n/**\n * Extent of the EPSG:4326 projection which is the whole world.\n *\n * @const\n * @type {import(\"../extent.js\").Extent}\n */\nexport var EXTENT = [-180, -90, 180, 90];\n\n\n/**\n * @const\n * @type {number}\n */\nexport var METERS_PER_UNIT = Math.PI * RADIUS / 180;\n\n\n/**\n * @classdesc\n * Projection object for WGS84 geographic coordinates (EPSG:4326).\n *\n * Note that OpenLayers does not strictly comply with the EPSG definition.\n * The EPSG registry defines 4326 as a CRS for Latitude,Longitude (y,x).\n * OpenLayers treats EPSG:4326 as a pseudo-projection, with x,y coordinates.\n */\nvar EPSG4326Projection = /*@__PURE__*/(function (Projection) {\n  function EPSG4326Projection(code, opt_axisOrientation) {\n    Projection.call(this, {\n      code: code,\n      units: Units.DEGREES,\n      extent: EXTENT,\n      axisOrientation: opt_axisOrientation,\n      global: true,\n      metersPerUnit: METERS_PER_UNIT,\n      worldExtent: EXTENT\n    });\n\n  }\n\n  if ( Projection ) EPSG4326Projection.__proto__ = Projection;\n  EPSG4326Projection.prototype = Object.create( Projection && Projection.prototype );\n  EPSG4326Projection.prototype.constructor = EPSG4326Projection;\n\n  return EPSG4326Projection;\n}(Projection));\n\n\n/**\n * Projections equal to EPSG:4326.\n *\n * @const\n * @type {Array<import(\"./Projection.js\").default>}\n */\nexport var PROJECTIONS = [\n  new EPSG4326Projection('CRS:84'),\n  new EPSG4326Projection('EPSG:4326', 'neu'),\n  new EPSG4326Projection('urn:ogc:def:crs:EPSG::4326', 'neu'),\n  new EPSG4326Projection('urn:ogc:def:crs:EPSG:6.6:4326', 'neu'),\n  new EPSG4326Projection('urn:ogc:def:crs:OGC:1.3:CRS84'),\n  new EPSG4326Projection('urn:ogc:def:crs:OGC:2:84'),\n  new EPSG4326Projection('http://www.opengis.net/gml/srs/epsg.xml#4326', 'neu'),\n  new EPSG4326Projection('urn:x-ogc:def:crs:EPSG:4326', 'neu')\n];\n\n//# sourceMappingURL=epsg4326.js.map","/**\n * @module ol/proj/projections\n */\n\n\n/**\n * @type {Object<string, import(\"./Projection.js\").default>}\n */\nvar cache = {};\n\n\n/**\n * Clear the projections cache.\n */\nexport function clear() {\n  cache = {};\n}\n\n\n/**\n * Get a cached projection by code.\n * @param {string} code The code for the projection.\n * @return {import(\"./Projection.js\").default} The projection (if cached).\n */\nexport function get(code) {\n  return cache[code] || null;\n}\n\n\n/**\n * Add a projection to the cache.\n * @param {string} code The projection code.\n * @param {import(\"./Projection.js\").default} projection The projection to cache.\n */\nexport function add(code, projection) {\n  cache[code] = projection;\n}\n\n//# sourceMappingURL=projections.js.map","/**\n * @module ol/proj/transforms\n */\nimport {isEmpty} from '../obj.js';\n\n\n/**\n * @private\n * @type {!Object<string, Object<string, import(\"../proj.js\").TransformFunction>>}\n */\nvar transforms = {};\n\n\n/**\n * Clear the transform cache.\n */\nexport function clear() {\n  transforms = {};\n}\n\n\n/**\n * Registers a conversion function to convert coordinates from the source\n * projection to the destination projection.\n *\n * @param {import(\"./Projection.js\").default} source Source.\n * @param {import(\"./Projection.js\").default} destination Destination.\n * @param {import(\"../proj.js\").TransformFunction} transformFn Transform.\n */\nexport function add(source, destination, transformFn) {\n  var sourceCode = source.getCode();\n  var destinationCode = destination.getCode();\n  if (!(sourceCode in transforms)) {\n    transforms[sourceCode] = {};\n  }\n  transforms[sourceCode][destinationCode] = transformFn;\n}\n\n\n/**\n * Unregisters the conversion function to convert coordinates from the source\n * projection to the destination projection.  This method is used to clean up\n * cached transforms during testing.\n *\n * @param {import(\"./Projection.js\").default} source Source projection.\n * @param {import(\"./Projection.js\").default} destination Destination projection.\n * @return {import(\"../proj.js\").TransformFunction} transformFn The unregistered transform.\n */\nexport function remove(source, destination) {\n  var sourceCode = source.getCode();\n  var destinationCode = destination.getCode();\n  var transform = transforms[sourceCode][destinationCode];\n  delete transforms[sourceCode][destinationCode];\n  if (isEmpty(transforms[sourceCode])) {\n    delete transforms[sourceCode];\n  }\n  return transform;\n}\n\n\n/**\n * Get a transform given a source code and a destination code.\n * @param {string} sourceCode The code for the source projection.\n * @param {string} destinationCode The code for the destination projection.\n * @return {import(\"../proj.js\").TransformFunction|undefined} The transform function (if found).\n */\nexport function get(sourceCode, destinationCode) {\n  var transform;\n  if (sourceCode in transforms && destinationCode in transforms[sourceCode]) {\n    transform = transforms[sourceCode][destinationCode];\n  }\n  return transform;\n}\n\n//# sourceMappingURL=transforms.js.map","/**\n * @module ol/proj\n */\n\n/**\n * The ol/proj module stores:\n * * a list of {@link module:ol/proj/Projection}\n * objects, one for each projection supported by the application\n * * a list of transform functions needed to convert coordinates in one projection\n * into another.\n *\n * The static functions are the methods used to maintain these.\n * Each transform function can handle not only simple coordinate pairs, but also\n * large arrays of coordinates such as vector geometries.\n *\n * When loaded, the library adds projection objects for EPSG:4326 (WGS84\n * geographic coordinates) and EPSG:3857 (Web or Spherical Mercator, as used\n * for example by Bing Maps or OpenStreetMap), together with the relevant\n * transform functions.\n *\n * Additional transforms may be added by using the http://proj4js.org/\n * library (version 2.2 or later). You can use the full build supplied by\n * Proj4js, or create a custom build to support those projections you need; see\n * the Proj4js website for how to do this. You also need the Proj4js definitions\n * for the required projections. These definitions can be obtained from\n * https://epsg.io/, and are a JS function, so can be loaded in a script\n * tag (as in the examples) or pasted into your application.\n *\n * After all required projection definitions are added to proj4's registry (by\n * using `proj4.defs()`), simply call `register(proj4)` from the `ol/proj/proj4`\n * package. Existing transforms are not changed by this function. See\n * examples/wms-image-custom-proj for an example of this.\n *\n * Additional projection definitions can be registered with `proj4.defs()` any\n * time. Just make sure to call `register(proj4)` again; for example, with user-supplied data where you don't\n * know in advance what projections are needed, you can initially load minimal\n * support and then load whichever are requested.\n *\n * Note that Proj4js does not support projection extents. If you want to add\n * one for creating default tile grids, you can add it after the Projection\n * object has been created with `setExtent`, for example,\n * `get('EPSG:1234').setExtent(extent)`.\n *\n * In addition to Proj4js support, any transform functions can be added with\n * {@link module:ol/proj~addCoordinateTransforms}. To use this, you must first create\n * a {@link module:ol/proj/Projection} object for the new projection and add it with\n * {@link module:ol/proj~addProjection}. You can then add the forward and inverse\n * functions with {@link module:ol/proj~addCoordinateTransforms}. See\n * examples/wms-custom-proj for an example of this.\n *\n * Note that if no transforms are needed and you only need to define the\n * projection, just add a {@link module:ol/proj/Projection} with\n * {@link module:ol/proj~addProjection}. See examples/wms-no-proj for an example of\n * this.\n */\nimport {getDistance} from './sphere.js';\nimport {applyTransform} from './extent.js';\nimport {modulo} from './math.js';\nimport {toEPSG4326, fromEPSG4326, PROJECTIONS as EPSG3857_PROJECTIONS} from './proj/epsg3857.js';\nimport {PROJECTIONS as EPSG4326_PROJECTIONS} from './proj/epsg4326.js';\nimport Projection from './proj/Projection.js';\nimport Units, {METERS_PER_UNIT} from './proj/Units.js';\nimport * as projections from './proj/projections.js';\nimport {add as addTransformFunc, clear as clearTransformFuncs, get as getTransformFunc} from './proj/transforms.js';\n\n\n/**\n * A projection as {@link module:ol/proj/Projection}, SRS identifier\n * string or undefined.\n * @typedef {Projection|string|undefined} ProjectionLike\n * @api\n */\n\n\n/**\n * A transform function accepts an array of input coordinate values, an optional\n * output array, and an optional dimension (default should be 2).  The function\n * transforms the input coordinate values, populates the output array, and\n * returns the output array.\n *\n * @typedef {function(Array<number>, Array<number>=, number=): Array<number>} TransformFunction\n * @api\n */\n\n\nexport {METERS_PER_UNIT};\n\nexport {Projection};\n\n/**\n * @param {Array<number>} input Input coordinate array.\n * @param {Array<number>=} opt_output Output array of coordinate values.\n * @param {number=} opt_dimension Dimension.\n * @return {Array<number>} Output coordinate array (new array, same coordinate\n *     values).\n */\nexport function cloneTransform(input, opt_output, opt_dimension) {\n  var output;\n  if (opt_output !== undefined) {\n    for (var i = 0, ii = input.length; i < ii; ++i) {\n      opt_output[i] = input[i];\n    }\n    output = opt_output;\n  } else {\n    output = input.slice();\n  }\n  return output;\n}\n\n\n/**\n * @param {Array<number>} input Input coordinate array.\n * @param {Array<number>=} opt_output Output array of coordinate values.\n * @param {number=} opt_dimension Dimension.\n * @return {Array<number>} Input coordinate array (same array as input).\n */\nexport function identityTransform(input, opt_output, opt_dimension) {\n  if (opt_output !== undefined && input !== opt_output) {\n    for (var i = 0, ii = input.length; i < ii; ++i) {\n      opt_output[i] = input[i];\n    }\n    input = opt_output;\n  }\n  return input;\n}\n\n\n/**\n * Add a Projection object to the list of supported projections that can be\n * looked up by their code.\n *\n * @param {Projection} projection Projection instance.\n * @api\n */\nexport function addProjection(projection) {\n  projections.add(projection.getCode(), projection);\n  addTransformFunc(projection, projection, cloneTransform);\n}\n\n\n/**\n * @param {Array<Projection>} projections Projections.\n */\nexport function addProjections(projections) {\n  projections.forEach(addProjection);\n}\n\n\n/**\n * Fetches a Projection object for the code specified.\n *\n * @param {ProjectionLike} projectionLike Either a code string which is\n *     a combination of authority and identifier such as \"EPSG:4326\", or an\n *     existing projection object, or undefined.\n * @return {Projection} Projection object, or null if not in list.\n * @api\n */\nexport function get(projectionLike) {\n  return typeof projectionLike === 'string' ?\n    projections.get(/** @type {string} */ (projectionLike)) :\n    (/** @type {Projection} */ (projectionLike) || null);\n}\n\n\n/**\n * Get the resolution of the point in degrees or distance units.\n * For projections with degrees as the unit this will simply return the\n * provided resolution. For other projections the point resolution is\n * by default estimated by transforming the 'point' pixel to EPSG:4326,\n * measuring its width and height on the normal sphere,\n * and taking the average of the width and height.\n * A custom function can be provided for a specific projection, either\n * by setting the `getPointResolution` option in the\n * {@link module:ol/proj/Projection~Projection} constructor or by using\n * {@link module:ol/proj/Projection~Projection#setGetPointResolution} to change an existing\n * projection object.\n * @param {ProjectionLike} projection The projection.\n * @param {number} resolution Nominal resolution in projection units.\n * @param {import(\"./coordinate.js\").Coordinate} point Point to find adjusted resolution at.\n * @param {Units=} opt_units Units to get the point resolution in.\n * Default is the projection's units.\n * @return {number} Point resolution.\n * @api\n */\nexport function getPointResolution(projection, resolution, point, opt_units) {\n  projection = get(projection);\n  var pointResolution;\n  var getter = projection.getPointResolutionFunc();\n  if (getter) {\n    pointResolution = getter(resolution, point);\n  } else {\n    var units = projection.getUnits();\n    if (units == Units.DEGREES && !opt_units || opt_units == Units.DEGREES) {\n      pointResolution = resolution;\n    } else {\n      // Estimate point resolution by transforming the center pixel to EPSG:4326,\n      // measuring its width and height on the normal sphere, and taking the\n      // average of the width and height.\n      var toEPSG4326 = getTransformFromProjections(projection, get('EPSG:4326'));\n      var vertices = [\n        point[0] - resolution / 2, point[1],\n        point[0] + resolution / 2, point[1],\n        point[0], point[1] - resolution / 2,\n        point[0], point[1] + resolution / 2\n      ];\n      vertices = toEPSG4326(vertices, vertices, 2);\n      var width = getDistance(vertices.slice(0, 2), vertices.slice(2, 4));\n      var height = getDistance(vertices.slice(4, 6), vertices.slice(6, 8));\n      pointResolution = (width + height) / 2;\n      var metersPerUnit = opt_units ?\n        METERS_PER_UNIT[opt_units] :\n        projection.getMetersPerUnit();\n      if (metersPerUnit !== undefined) {\n        pointResolution /= metersPerUnit;\n      }\n    }\n  }\n  return pointResolution;\n}\n\n\n/**\n * Registers transformation functions that don't alter coordinates. Those allow\n * to transform between projections with equal meaning.\n *\n * @param {Array<Projection>} projections Projections.\n * @api\n */\nexport function addEquivalentProjections(projections) {\n  addProjections(projections);\n  projections.forEach(function(source) {\n    projections.forEach(function(destination) {\n      if (source !== destination) {\n        addTransformFunc(source, destination, cloneTransform);\n      }\n    });\n  });\n}\n\n\n/**\n * Registers transformation functions to convert coordinates in any projection\n * in projection1 to any projection in projection2.\n *\n * @param {Array<Projection>} projections1 Projections with equal\n *     meaning.\n * @param {Array<Projection>} projections2 Projections with equal\n *     meaning.\n * @param {TransformFunction} forwardTransform Transformation from any\n *   projection in projection1 to any projection in projection2.\n * @param {TransformFunction} inverseTransform Transform from any projection\n *   in projection2 to any projection in projection1..\n */\nexport function addEquivalentTransforms(projections1, projections2, forwardTransform, inverseTransform) {\n  projections1.forEach(function(projection1) {\n    projections2.forEach(function(projection2) {\n      addTransformFunc(projection1, projection2, forwardTransform);\n      addTransformFunc(projection2, projection1, inverseTransform);\n    });\n  });\n}\n\n\n/**\n * Clear all cached projections and transforms.\n */\nexport function clearAllProjections() {\n  projections.clear();\n  clearTransformFuncs();\n}\n\n\n/**\n * @param {Projection|string|undefined} projection Projection.\n * @param {string} defaultCode Default code.\n * @return {Projection} Projection.\n */\nexport function createProjection(projection, defaultCode) {\n  if (!projection) {\n    return get(defaultCode);\n  } else if (typeof projection === 'string') {\n    return get(projection);\n  } else {\n    return (\n      /** @type {Projection} */ (projection)\n    );\n  }\n}\n\n\n/**\n * Creates a {@link module:ol/proj~TransformFunction} from a simple 2D coordinate transform\n * function.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} coordTransform Coordinate\n *     transform.\n * @return {TransformFunction} Transform function.\n */\nexport function createTransformFromCoordinateTransform(coordTransform) {\n  return (\n    /**\n     * @param {Array<number>} input Input.\n     * @param {Array<number>=} opt_output Output.\n     * @param {number=} opt_dimension Dimension.\n     * @return {Array<number>} Output.\n     */\n    function(input, opt_output, opt_dimension) {\n      var length = input.length;\n      var dimension = opt_dimension !== undefined ? opt_dimension : 2;\n      var output = opt_output !== undefined ? opt_output : new Array(length);\n      for (var i = 0; i < length; i += dimension) {\n        var point = coordTransform([input[i], input[i + 1]]);\n        output[i] = point[0];\n        output[i + 1] = point[1];\n        for (var j = dimension - 1; j >= 2; --j) {\n          output[i + j] = input[i + j];\n        }\n      }\n      return output;\n    });\n}\n\n\n/**\n * Registers coordinate transform functions to convert coordinates between the\n * source projection and the destination projection.\n * The forward and inverse functions convert coordinate pairs; this function\n * converts these into the functions used internally which also handle\n * extents and coordinate arrays.\n *\n * @param {ProjectionLike} source Source projection.\n * @param {ProjectionLike} destination Destination projection.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} forward The forward transform\n *     function (that is, from the source projection to the destination\n *     projection) that takes a {@link module:ol/coordinate~Coordinate} as argument and returns\n *     the transformed {@link module:ol/coordinate~Coordinate}.\n * @param {function(import(\"./coordinate.js\").Coordinate): import(\"./coordinate.js\").Coordinate} inverse The inverse transform\n *     function (that is, from the destination projection to the source\n *     projection) that takes a {@link module:ol/coordinate~Coordinate} as argument and returns\n *     the transformed {@link module:ol/coordinate~Coordinate}.\n * @api\n */\nexport function addCoordinateTransforms(source, destination, forward, inverse) {\n  var sourceProj = get(source);\n  var destProj = get(destination);\n  addTransformFunc(sourceProj, destProj, createTransformFromCoordinateTransform(forward));\n  addTransformFunc(destProj, sourceProj, createTransformFromCoordinateTransform(inverse));\n}\n\n\n/**\n * Transforms a coordinate from longitude/latitude to a different projection.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate as longitude and latitude, i.e.\n *     an array with longitude as 1st and latitude as 2nd element.\n * @param {ProjectionLike=} opt_projection Target projection. The\n *     default is Web Mercator, i.e. 'EPSG:3857'.\n * @return {import(\"./coordinate.js\").Coordinate} Coordinate projected to the target projection.\n * @api\n */\nexport function fromLonLat(coordinate, opt_projection) {\n  return transform(coordinate, 'EPSG:4326',\n    opt_projection !== undefined ? opt_projection : 'EPSG:3857');\n}\n\n\n/**\n * Transforms a coordinate to longitude/latitude.\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Projected coordinate.\n * @param {ProjectionLike=} opt_projection Projection of the coordinate.\n *     The default is Web Mercator, i.e. 'EPSG:3857'.\n * @return {import(\"./coordinate.js\").Coordinate} Coordinate as longitude and latitude, i.e. an array\n *     with longitude as 1st and latitude as 2nd element.\n * @api\n */\nexport function toLonLat(coordinate, opt_projection) {\n  var lonLat = transform(coordinate,\n    opt_projection !== undefined ? opt_projection : 'EPSG:3857', 'EPSG:4326');\n  var lon = lonLat[0];\n  if (lon < -180 || lon > 180) {\n    lonLat[0] = modulo(lon + 180, 360) - 180;\n  }\n  return lonLat;\n}\n\n\n/**\n * Checks if two projections are the same, that is every coordinate in one\n * projection does represent the same geographic point as the same coordinate in\n * the other projection.\n *\n * @param {Projection} projection1 Projection 1.\n * @param {Projection} projection2 Projection 2.\n * @return {boolean} Equivalent.\n * @api\n */\nexport function equivalent(projection1, projection2) {\n  if (projection1 === projection2) {\n    return true;\n  }\n  var equalUnits = projection1.getUnits() === projection2.getUnits();\n  if (projection1.getCode() === projection2.getCode()) {\n    return equalUnits;\n  } else {\n    var transformFunc = getTransformFromProjections(projection1, projection2);\n    return transformFunc === cloneTransform && equalUnits;\n  }\n}\n\n\n/**\n * Searches in the list of transform functions for the function for converting\n * coordinates from the source projection to the destination projection.\n *\n * @param {Projection} sourceProjection Source Projection object.\n * @param {Projection} destinationProjection Destination Projection\n *     object.\n * @return {TransformFunction} Transform function.\n */\nexport function getTransformFromProjections(sourceProjection, destinationProjection) {\n  var sourceCode = sourceProjection.getCode();\n  var destinationCode = destinationProjection.getCode();\n  var transformFunc = getTransformFunc(sourceCode, destinationCode);\n  if (!transformFunc) {\n    transformFunc = identityTransform;\n  }\n  return transformFunc;\n}\n\n\n/**\n * Given the projection-like objects, searches for a transformation\n * function to convert a coordinates array from the source projection to the\n * destination projection.\n *\n * @param {ProjectionLike} source Source.\n * @param {ProjectionLike} destination Destination.\n * @return {TransformFunction} Transform function.\n * @api\n */\nexport function getTransform(source, destination) {\n  var sourceProjection = get(source);\n  var destinationProjection = get(destination);\n  return getTransformFromProjections(sourceProjection, destinationProjection);\n}\n\n\n/**\n * Transforms a coordinate from source projection to destination projection.\n * This returns a new coordinate (and does not modify the original).\n *\n * See {@link module:ol/proj~transformExtent} for extent transformation.\n * See the transform method of {@link module:ol/geom/Geometry~Geometry} and its\n * subclasses for geometry transforms.\n *\n * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {ProjectionLike} source Source projection-like.\n * @param {ProjectionLike} destination Destination projection-like.\n * @return {import(\"./coordinate.js\").Coordinate} Coordinate.\n * @api\n */\nexport function transform(coordinate, source, destination) {\n  var transformFunc = getTransform(source, destination);\n  return transformFunc(coordinate, undefined, coordinate.length);\n}\n\n\n/**\n * Transforms an extent from source projection to destination projection.  This\n * returns a new extent (and does not modify the original).\n *\n * @param {import(\"./extent.js\").Extent} extent The extent to transform.\n * @param {ProjectionLike} source Source projection-like.\n * @param {ProjectionLike} destination Destination projection-like.\n * @return {import(\"./extent.js\").Extent} The transformed extent.\n * @api\n */\nexport function transformExtent(extent, source, destination) {\n  var transformFunc = getTransform(source, destination);\n  return applyTransform(extent, transformFunc);\n}\n\n\n/**\n * Transforms the given point to the destination projection.\n *\n * @param {import(\"./coordinate.js\").Coordinate} point Point.\n * @param {Projection} sourceProjection Source projection.\n * @param {Projection} destinationProjection Destination projection.\n * @return {import(\"./coordinate.js\").Coordinate} Point.\n */\nexport function transformWithProjections(point, sourceProjection, destinationProjection) {\n  var transformFunc = getTransformFromProjections(sourceProjection, destinationProjection);\n  return transformFunc(point);\n}\n\n/**\n * Add transforms to and from EPSG:4326 and EPSG:3857.  This function is called\n * by when this module is executed and should only need to be called again after\n * `clearAllProjections()` is called (e.g. in tests).\n */\nexport function addCommon() {\n  // Add transformations that don't alter coordinates to convert within set of\n  // projections with equal meaning.\n  addEquivalentProjections(EPSG3857_PROJECTIONS);\n  addEquivalentProjections(EPSG4326_PROJECTIONS);\n  // Add transformations to convert EPSG:4326 like coordinates to EPSG:3857 like\n  // coordinates and back.\n  addEquivalentTransforms(EPSG4326_PROJECTIONS, EPSG3857_PROJECTIONS, fromEPSG4326, toEPSG4326);\n}\n\naddCommon();\n\n//# sourceMappingURL=proj.js.map","/**\n * @module ol/transform\n */\nimport {assert} from './asserts.js';\n\n\n/**\n * An array representing an affine 2d transformation for use with\n * {@link module:ol/transform} functions. The array has 6 elements.\n * @typedef {!Array<number>} Transform\n */\n\n\n/**\n * Collection of affine 2d transformation functions. The functions work on an\n * array of 6 elements. The element order is compatible with the [SVGMatrix\n * interface](https://developer.mozilla.org/en-US/docs/Web/API/SVGMatrix) and is\n * a subset (elements a to f) of a 3×3 matrix:\n * ```\n * [ a c e ]\n * [ b d f ]\n * [ 0 0 1 ]\n * ```\n */\n\n\n/**\n * @private\n * @type {Transform}\n */\nvar tmp_ = new Array(6);\n\n\n/**\n * Create an identity transform.\n * @return {!Transform} Identity transform.\n */\nexport function create() {\n  return [1, 0, 0, 1, 0, 0];\n}\n\n\n/**\n * Resets the given transform to an identity transform.\n * @param {!Transform} transform Transform.\n * @return {!Transform} Transform.\n */\nexport function reset(transform) {\n  return set(transform, 1, 0, 0, 1, 0, 0);\n}\n\n\n/**\n * Multiply the underlying matrices of two transforms and return the result in\n * the first transform.\n * @param {!Transform} transform1 Transform parameters of matrix 1.\n * @param {!Transform} transform2 Transform parameters of matrix 2.\n * @return {!Transform} transform1 multiplied with transform2.\n */\nexport function multiply(transform1, transform2) {\n  var a1 = transform1[0];\n  var b1 = transform1[1];\n  var c1 = transform1[2];\n  var d1 = transform1[3];\n  var e1 = transform1[4];\n  var f1 = transform1[5];\n  var a2 = transform2[0];\n  var b2 = transform2[1];\n  var c2 = transform2[2];\n  var d2 = transform2[3];\n  var e2 = transform2[4];\n  var f2 = transform2[5];\n\n  transform1[0] = a1 * a2 + c1 * b2;\n  transform1[1] = b1 * a2 + d1 * b2;\n  transform1[2] = a1 * c2 + c1 * d2;\n  transform1[3] = b1 * c2 + d1 * d2;\n  transform1[4] = a1 * e2 + c1 * f2 + e1;\n  transform1[5] = b1 * e2 + d1 * f2 + f1;\n\n  return transform1;\n}\n\n/**\n * Set the transform components a-f on a given transform.\n * @param {!Transform} transform Transform.\n * @param {number} a The a component of the transform.\n * @param {number} b The b component of the transform.\n * @param {number} c The c component of the transform.\n * @param {number} d The d component of the transform.\n * @param {number} e The e component of the transform.\n * @param {number} f The f component of the transform.\n * @return {!Transform} Matrix with transform applied.\n */\nexport function set(transform, a, b, c, d, e, f) {\n  transform[0] = a;\n  transform[1] = b;\n  transform[2] = c;\n  transform[3] = d;\n  transform[4] = e;\n  transform[5] = f;\n  return transform;\n}\n\n\n/**\n * Set transform on one matrix from another matrix.\n * @param {!Transform} transform1 Matrix to set transform to.\n * @param {!Transform} transform2 Matrix to set transform from.\n * @return {!Transform} transform1 with transform from transform2 applied.\n */\nexport function setFromArray(transform1, transform2) {\n  transform1[0] = transform2[0];\n  transform1[1] = transform2[1];\n  transform1[2] = transform2[2];\n  transform1[3] = transform2[3];\n  transform1[4] = transform2[4];\n  transform1[5] = transform2[5];\n  return transform1;\n}\n\n\n/**\n * Transforms the given coordinate with the given transform returning the\n * resulting, transformed coordinate. The coordinate will be modified in-place.\n *\n * @param {Transform} transform The transformation.\n * @param {import(\"./coordinate.js\").Coordinate|import(\"./pixel.js\").Pixel} coordinate The coordinate to transform.\n * @return {import(\"./coordinate.js\").Coordinate|import(\"./pixel.js\").Pixel} return coordinate so that operations can be\n *     chained together.\n */\nexport function apply(transform, coordinate) {\n  var x = coordinate[0];\n  var y = coordinate[1];\n  coordinate[0] = transform[0] * x + transform[2] * y + transform[4];\n  coordinate[1] = transform[1] * x + transform[3] * y + transform[5];\n  return coordinate;\n}\n\n\n/**\n * Applies rotation to the given transform.\n * @param {!Transform} transform Transform.\n * @param {number} angle Angle in radians.\n * @return {!Transform} The rotated transform.\n */\nexport function rotate(transform, angle) {\n  var cos = Math.cos(angle);\n  var sin = Math.sin(angle);\n  return multiply(transform, set(tmp_, cos, sin, -sin, cos, 0, 0));\n}\n\n\n/**\n * Applies scale to a given transform.\n * @param {!Transform} transform Transform.\n * @param {number} x Scale factor x.\n * @param {number} y Scale factor y.\n * @return {!Transform} The scaled transform.\n */\nexport function scale(transform, x, y) {\n  return multiply(transform, set(tmp_, x, 0, 0, y, 0, 0));\n}\n\n\n/**\n * Applies translation to the given transform.\n * @param {!Transform} transform Transform.\n * @param {number} dx Translation x.\n * @param {number} dy Translation y.\n * @return {!Transform} The translated transform.\n */\nexport function translate(transform, dx, dy) {\n  return multiply(transform, set(tmp_, 1, 0, 0, 1, dx, dy));\n}\n\n\n/**\n * Creates a composite transform given an initial translation, scale, rotation, and\n * final translation (in that order only, not commutative).\n * @param {!Transform} transform The transform (will be modified in place).\n * @param {number} dx1 Initial translation x.\n * @param {number} dy1 Initial translation y.\n * @param {number} sx Scale factor x.\n * @param {number} sy Scale factor y.\n * @param {number} angle Rotation (in counter-clockwise radians).\n * @param {number} dx2 Final translation x.\n * @param {number} dy2 Final translation y.\n * @return {!Transform} The composite transform.\n */\nexport function compose(transform, dx1, dy1, sx, sy, angle, dx2, dy2) {\n  var sin = Math.sin(angle);\n  var cos = Math.cos(angle);\n  transform[0] = sx * cos;\n  transform[1] = sy * sin;\n  transform[2] = -sx * sin;\n  transform[3] = sy * cos;\n  transform[4] = dx2 * sx * cos - dy2 * sx * sin + dx1;\n  transform[5] = dx2 * sy * sin + dy2 * sy * cos + dy1;\n  return transform;\n}\n\n\n/**\n * Invert the given transform.\n * @param {!Transform} transform Transform.\n * @return {!Transform} Inverse of the transform.\n */\nexport function invert(transform) {\n  var det = determinant(transform);\n  assert(det !== 0, 32); // Transformation matrix cannot be inverted\n\n  var a = transform[0];\n  var b = transform[1];\n  var c = transform[2];\n  var d = transform[3];\n  var e = transform[4];\n  var f = transform[5];\n\n  transform[0] = d / det;\n  transform[1] = -b / det;\n  transform[2] = -c / det;\n  transform[3] = a / det;\n  transform[4] = (c * f - d * e) / det;\n  transform[5] = -(a * f - b * e) / det;\n\n  return transform;\n}\n\n\n/**\n * Returns the determinant of the given matrix.\n * @param {!Transform} mat Matrix.\n * @return {number} Determinant.\n */\nexport function determinant(mat) {\n  return mat[0] * mat[3] - mat[1] * mat[2];\n}\n\n//# sourceMappingURL=transform.js.map","/**\n * @module ol/geom/Geometry\n */\nimport {abstract} from '../util.js';\nimport BaseObject from '../Object.js';\nimport {createEmpty, getHeight, returnOrUpdate} from '../extent.js';\nimport {transform2D} from './flat/transform.js';\nimport {get as getProjection, getTransform} from '../proj.js';\nimport Units from '../proj/Units.js';\nimport {create as createTransform, compose as composeTransform} from '../transform.js';\n\n\n/**\n * @type {import(\"../transform.js\").Transform}\n */\nvar tmpTransform = createTransform();\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for vector geometries.\n *\n * To get notified of changes to the geometry, register a listener for the\n * generic `change` event on your geometry instance.\n *\n * @abstract\n * @api\n */\nvar Geometry = /*@__PURE__*/(function (BaseObject) {\n  function Geometry() {\n\n    BaseObject.call(this);\n\n    /**\n     * @private\n     * @type {import(\"../extent.js\").Extent}\n     */\n    this.extent_ = createEmpty();\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.extentRevision_ = -1;\n\n    /**\n     * @protected\n     * @type {Object<string, Geometry>}\n     */\n    this.simplifiedGeometryCache = {};\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.simplifiedGeometryMaxMinSquaredTolerance = 0;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.simplifiedGeometryRevision = 0;\n\n  }\n\n  if ( BaseObject ) Geometry.__proto__ = BaseObject;\n  Geometry.prototype = Object.create( BaseObject && BaseObject.prototype );\n  Geometry.prototype.constructor = Geometry;\n\n  /**\n   * Make a complete copy of the geometry.\n   * @abstract\n   * @return {!Geometry} Clone.\n   */\n  Geometry.prototype.clone = function clone () {\n    return abstract();\n  };\n\n  /**\n   * @abstract\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @param {import(\"../coordinate.js\").Coordinate} closestPoint Closest point.\n   * @param {number} minSquaredDistance Minimum squared distance.\n   * @return {number} Minimum squared distance.\n   */\n  Geometry.prototype.closestPointXY = function closestPointXY (x, y, closestPoint, minSquaredDistance) {\n    return abstract();\n  };\n\n  /**\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @return {boolean} Contains (x, y).\n   */\n  Geometry.prototype.containsXY = function containsXY (x, y) {\n    return false;\n  };\n\n  /**\n   * Return the closest point of the geometry to the passed point as\n   * {@link module:ol/coordinate~Coordinate coordinate}.\n   * @param {import(\"../coordinate.js\").Coordinate} point Point.\n   * @param {import(\"../coordinate.js\").Coordinate=} opt_closestPoint Closest point.\n   * @return {import(\"../coordinate.js\").Coordinate} Closest point.\n   * @api\n   */\n  Geometry.prototype.getClosestPoint = function getClosestPoint (point, opt_closestPoint) {\n    var closestPoint = opt_closestPoint ? opt_closestPoint : [NaN, NaN];\n    this.closestPointXY(point[0], point[1], closestPoint, Infinity);\n    return closestPoint;\n  };\n\n  /**\n   * Returns true if this geometry includes the specified coordinate. If the\n   * coordinate is on the boundary of the geometry, returns false.\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @return {boolean} Contains coordinate.\n   * @api\n   */\n  Geometry.prototype.intersectsCoordinate = function intersectsCoordinate (coordinate) {\n    return this.containsXY(coordinate[0], coordinate[1]);\n  };\n\n  /**\n   * @abstract\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @protected\n   * @return {import(\"../extent.js\").Extent} extent Extent.\n   */\n  Geometry.prototype.computeExtent = function computeExtent (extent) {\n    return abstract();\n  };\n\n  /**\n   * Get the extent of the geometry.\n   * @param {import(\"../extent.js\").Extent=} opt_extent Extent.\n   * @return {import(\"../extent.js\").Extent} extent Extent.\n   * @api\n   */\n  Geometry.prototype.getExtent = function getExtent (opt_extent) {\n    if (this.extentRevision_ != this.getRevision()) {\n      this.extent_ = this.computeExtent(this.extent_);\n      this.extentRevision_ = this.getRevision();\n    }\n    return returnOrUpdate(this.extent_, opt_extent);\n  };\n\n  /**\n   * Rotate the geometry around a given coordinate. This modifies the geometry\n   * coordinates in place.\n   * @abstract\n   * @param {number} angle Rotation angle in radians.\n   * @param {import(\"../coordinate.js\").Coordinate} anchor The rotation center.\n   * @api\n   */\n  Geometry.prototype.rotate = function rotate (angle, anchor) {\n    abstract();\n  };\n\n  /**\n   * Scale the geometry (with an optional origin).  This modifies the geometry\n   * coordinates in place.\n   * @abstract\n   * @param {number} sx The scaling factor in the x-direction.\n   * @param {number=} opt_sy The scaling factor in the y-direction (defaults to\n   *     sx).\n   * @param {import(\"../coordinate.js\").Coordinate=} opt_anchor The scale origin (defaults to the center\n   *     of the geometry extent).\n   * @api\n   */\n  Geometry.prototype.scale = function scale (sx, opt_sy, opt_anchor) {\n    abstract();\n  };\n\n  /**\n   * Create a simplified version of this geometry.  For linestrings, this uses\n   * the the {@link\n   * https://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm\n   * Douglas Peucker} algorithm.  For polygons, a quantization-based\n   * simplification is used to preserve topology.\n   * @param {number} tolerance The tolerance distance for simplification.\n   * @return {Geometry} A new, simplified version of the original geometry.\n   * @api\n   */\n  Geometry.prototype.simplify = function simplify (tolerance) {\n    return this.getSimplifiedGeometry(tolerance * tolerance);\n  };\n\n  /**\n   * Create a simplified version of this geometry using the Douglas Peucker\n   * algorithm.\n   * See https://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm.\n   * @abstract\n   * @param {number} squaredTolerance Squared tolerance.\n   * @return {Geometry} Simplified geometry.\n   */\n  Geometry.prototype.getSimplifiedGeometry = function getSimplifiedGeometry (squaredTolerance) {\n    return abstract();\n  };\n\n  /**\n   * Get the type of this geometry.\n   * @abstract\n   * @return {import(\"./GeometryType.js\").default} Geometry type.\n   */\n  Geometry.prototype.getType = function getType () {\n    return abstract();\n  };\n\n  /**\n   * Apply a transform function to each coordinate of the geometry.\n   * The geometry is modified in place.\n   * If you do not want the geometry modified in place, first `clone()` it and\n   * then use this function on the clone.\n   * @abstract\n   * @param {import(\"../proj.js\").TransformFunction} transformFn Transform.\n   */\n  Geometry.prototype.applyTransform = function applyTransform (transformFn) {\n    abstract();\n  };\n\n  /**\n   * Test if the geometry and the passed extent intersect.\n   * @abstract\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @return {boolean} `true` if the geometry and the extent intersect.\n   */\n  Geometry.prototype.intersectsExtent = function intersectsExtent (extent) {\n    return abstract();\n  };\n\n  /**\n   * Translate the geometry.  This modifies the geometry coordinates in place.  If\n   * instead you want a new geometry, first `clone()` this geometry.\n   * @abstract\n   * @param {number} deltaX Delta X.\n   * @param {number} deltaY Delta Y.\n   * @api\n   */\n  Geometry.prototype.translate = function translate (deltaX, deltaY) {\n    abstract();\n  };\n\n  /**\n   * Transform each coordinate of the geometry from one coordinate reference\n   * system to another. The geometry is modified in place.\n   * For example, a line will be transformed to a line and a circle to a circle.\n   * If you do not want the geometry modified in place, first `clone()` it and\n   * then use this function on the clone.\n   *\n   * @param {import(\"../proj.js\").ProjectionLike} source The current projection.  Can be a\n   *     string identifier or a {@link module:ol/proj/Projection~Projection} object.\n   * @param {import(\"../proj.js\").ProjectionLike} destination The desired projection.  Can be a\n   *     string identifier or a {@link module:ol/proj/Projection~Projection} object.\n   * @return {Geometry} This geometry.  Note that original geometry is\n   *     modified in place.\n   * @api\n   */\n  Geometry.prototype.transform = function transform (source, destination) {\n    /** @type {import(\"../proj/Projection.js\").default} */\n    var sourceProj = getProjection(source);\n    var transformFn = sourceProj.getUnits() == Units.TILE_PIXELS ?\n      function(inCoordinates, outCoordinates, stride) {\n        var pixelExtent = sourceProj.getExtent();\n        var projectedExtent = sourceProj.getWorldExtent();\n        var scale = getHeight(projectedExtent) / getHeight(pixelExtent);\n        composeTransform(tmpTransform,\n          projectedExtent[0], projectedExtent[3],\n          scale, -scale, 0,\n          0, 0);\n        transform2D(inCoordinates, 0, inCoordinates.length, stride,\n          tmpTransform, outCoordinates);\n        return getTransform(sourceProj, destination)(inCoordinates, outCoordinates, stride);\n      } :\n      getTransform(sourceProj, destination);\n    this.applyTransform(transformFn);\n    return this;\n  };\n\n  return Geometry;\n}(BaseObject));\n\n\nexport default Geometry;\n\n//# sourceMappingURL=Geometry.js.map","/**\n * @module ol/geom/SimpleGeometry\n */\nimport {abstract} from '../util.js';\nimport {createOrUpdateFromFlatCoordinates, getCenter} from '../extent.js';\nimport Geometry from './Geometry.js';\nimport GeometryLayout from './GeometryLayout.js';\nimport {rotate, scale, translate, transform2D} from './flat/transform.js';\nimport {clear} from '../obj.js';\n\n/**\n * @classdesc\n * Abstract base class; only used for creating subclasses; do not instantiate\n * in apps, as cannot be rendered.\n *\n * @abstract\n * @api\n */\nvar SimpleGeometry = /*@__PURE__*/(function (Geometry) {\n  function SimpleGeometry() {\n\n    Geometry.call(this);\n\n    /**\n     * @protected\n     * @type {GeometryLayout}\n     */\n    this.layout = GeometryLayout.XY;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.stride = 2;\n\n    /**\n     * @protected\n     * @type {Array<number>}\n     */\n    this.flatCoordinates = null;\n\n  }\n\n  if ( Geometry ) SimpleGeometry.__proto__ = Geometry;\n  SimpleGeometry.prototype = Object.create( Geometry && Geometry.prototype );\n  SimpleGeometry.prototype.constructor = SimpleGeometry;\n\n  /**\n   * @inheritDoc\n   */\n  SimpleGeometry.prototype.computeExtent = function computeExtent (extent) {\n    return createOrUpdateFromFlatCoordinates(this.flatCoordinates,\n      0, this.flatCoordinates.length, this.stride, extent);\n  };\n\n  /**\n   * @abstract\n   * @return {Array} Coordinates.\n   */\n  SimpleGeometry.prototype.getCoordinates = function getCoordinates () {\n    return abstract();\n  };\n\n  /**\n   * Return the first coordinate of the geometry.\n   * @return {import(\"../coordinate.js\").Coordinate} First coordinate.\n   * @api\n   */\n  SimpleGeometry.prototype.getFirstCoordinate = function getFirstCoordinate () {\n    return this.flatCoordinates.slice(0, this.stride);\n  };\n\n  /**\n   * @return {Array<number>} Flat coordinates.\n   */\n  SimpleGeometry.prototype.getFlatCoordinates = function getFlatCoordinates () {\n    return this.flatCoordinates;\n  };\n\n  /**\n   * Return the last coordinate of the geometry.\n   * @return {import(\"../coordinate.js\").Coordinate} Last point.\n   * @api\n   */\n  SimpleGeometry.prototype.getLastCoordinate = function getLastCoordinate () {\n    return this.flatCoordinates.slice(this.flatCoordinates.length - this.stride);\n  };\n\n  /**\n   * Return the {@link module:ol/geom/GeometryLayout layout} of the geometry.\n   * @return {GeometryLayout} Layout.\n   * @api\n   */\n  SimpleGeometry.prototype.getLayout = function getLayout () {\n    return this.layout;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  SimpleGeometry.prototype.getSimplifiedGeometry = function getSimplifiedGeometry (squaredTolerance) {\n    if (this.simplifiedGeometryRevision != this.getRevision()) {\n      clear(this.simplifiedGeometryCache);\n      this.simplifiedGeometryMaxMinSquaredTolerance = 0;\n      this.simplifiedGeometryRevision = this.getRevision();\n    }\n    // If squaredTolerance is negative or if we know that simplification will not\n    // have any effect then just return this.\n    if (squaredTolerance < 0 ||\n        (this.simplifiedGeometryMaxMinSquaredTolerance !== 0 &&\n         squaredTolerance <= this.simplifiedGeometryMaxMinSquaredTolerance)) {\n      return this;\n    }\n    var key = squaredTolerance.toString();\n    if (this.simplifiedGeometryCache.hasOwnProperty(key)) {\n      return this.simplifiedGeometryCache[key];\n    } else {\n      var simplifiedGeometry =\n          this.getSimplifiedGeometryInternal(squaredTolerance);\n      var simplifiedFlatCoordinates = simplifiedGeometry.getFlatCoordinates();\n      if (simplifiedFlatCoordinates.length < this.flatCoordinates.length) {\n        this.simplifiedGeometryCache[key] = simplifiedGeometry;\n        return simplifiedGeometry;\n      } else {\n        // Simplification did not actually remove any coordinates.  We now know\n        // that any calls to getSimplifiedGeometry with a squaredTolerance less\n        // than or equal to the current squaredTolerance will also not have any\n        // effect.  This allows us to short circuit simplification (saving CPU\n        // cycles) and prevents the cache of simplified geometries from filling\n        // up with useless identical copies of this geometry (saving memory).\n        this.simplifiedGeometryMaxMinSquaredTolerance = squaredTolerance;\n        return this;\n      }\n    }\n  };\n\n  /**\n   * @param {number} squaredTolerance Squared tolerance.\n   * @return {SimpleGeometry} Simplified geometry.\n   * @protected\n   */\n  SimpleGeometry.prototype.getSimplifiedGeometryInternal = function getSimplifiedGeometryInternal (squaredTolerance) {\n    return this;\n  };\n\n  /**\n   * @return {number} Stride.\n   */\n  SimpleGeometry.prototype.getStride = function getStride () {\n    return this.stride;\n  };\n\n  /**\n   * @param {GeometryLayout} layout Layout.\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   */\n  SimpleGeometry.prototype.setFlatCoordinates = function setFlatCoordinates (layout, flatCoordinates) {\n    this.stride = getStrideForLayout(layout);\n    this.layout = layout;\n    this.flatCoordinates = flatCoordinates;\n  };\n\n  /**\n   * @abstract\n   * @param {!Array} coordinates Coordinates.\n   * @param {GeometryLayout=} opt_layout Layout.\n   */\n  SimpleGeometry.prototype.setCoordinates = function setCoordinates (coordinates, opt_layout) {\n    abstract();\n  };\n\n  /**\n   * @param {GeometryLayout|undefined} layout Layout.\n   * @param {Array} coordinates Coordinates.\n   * @param {number} nesting Nesting.\n   * @protected\n   */\n  SimpleGeometry.prototype.setLayout = function setLayout (layout, coordinates, nesting) {\n    /** @type {number} */\n    var stride;\n    if (layout) {\n      stride = getStrideForLayout(layout);\n    } else {\n      for (var i = 0; i < nesting; ++i) {\n        if (coordinates.length === 0) {\n          this.layout = GeometryLayout.XY;\n          this.stride = 2;\n          return;\n        } else {\n          coordinates = /** @type {Array} */ (coordinates[0]);\n        }\n      }\n      stride = coordinates.length;\n      layout = getLayoutForStride(stride);\n    }\n    this.layout = layout;\n    this.stride = stride;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  SimpleGeometry.prototype.applyTransform = function applyTransform (transformFn) {\n    if (this.flatCoordinates) {\n      transformFn(this.flatCoordinates, this.flatCoordinates, this.stride);\n      this.changed();\n    }\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  SimpleGeometry.prototype.rotate = function rotate$1 (angle, anchor) {\n    var flatCoordinates = this.getFlatCoordinates();\n    if (flatCoordinates) {\n      var stride = this.getStride();\n      rotate(\n        flatCoordinates, 0, flatCoordinates.length,\n        stride, angle, anchor, flatCoordinates);\n      this.changed();\n    }\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  SimpleGeometry.prototype.scale = function scale$1 (sx, opt_sy, opt_anchor) {\n    var sy = opt_sy;\n    if (sy === undefined) {\n      sy = sx;\n    }\n    var anchor = opt_anchor;\n    if (!anchor) {\n      anchor = getCenter(this.getExtent());\n    }\n    var flatCoordinates = this.getFlatCoordinates();\n    if (flatCoordinates) {\n      var stride = this.getStride();\n      scale(\n        flatCoordinates, 0, flatCoordinates.length,\n        stride, sx, sy, anchor, flatCoordinates);\n      this.changed();\n    }\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  SimpleGeometry.prototype.translate = function translate$1 (deltaX, deltaY) {\n    var flatCoordinates = this.getFlatCoordinates();\n    if (flatCoordinates) {\n      var stride = this.getStride();\n      translate(\n        flatCoordinates, 0, flatCoordinates.length, stride,\n        deltaX, deltaY, flatCoordinates);\n      this.changed();\n    }\n  };\n\n  return SimpleGeometry;\n}(Geometry));\n\n\n/**\n * @param {number} stride Stride.\n * @return {GeometryLayout} layout Layout.\n */\nfunction getLayoutForStride(stride) {\n  var layout;\n  if (stride == 2) {\n    layout = GeometryLayout.XY;\n  } else if (stride == 3) {\n    layout = GeometryLayout.XYZ;\n  } else if (stride == 4) {\n    layout = GeometryLayout.XYZM;\n  }\n  return (\n    /** @type {GeometryLayout} */ (layout)\n  );\n}\n\n\n/**\n * @param {GeometryLayout} layout Layout.\n * @return {number} Stride.\n */\nexport function getStrideForLayout(layout) {\n  var stride;\n  if (layout == GeometryLayout.XY) {\n    stride = 2;\n  } else if (layout == GeometryLayout.XYZ || layout == GeometryLayout.XYM) {\n    stride = 3;\n  } else if (layout == GeometryLayout.XYZM) {\n    stride = 4;\n  }\n  return /** @type {number} */ (stride);\n}\n\n\n/**\n * @param {SimpleGeometry} simpleGeometry Simple geometry.\n * @param {import(\"../transform.js\").Transform} transform Transform.\n * @param {Array<number>=} opt_dest Destination.\n * @return {Array<number>} Transformed flat coordinates.\n */\nexport function transformGeom2D(simpleGeometry, transform, opt_dest) {\n  var flatCoordinates = simpleGeometry.getFlatCoordinates();\n  if (!flatCoordinates) {\n    return null;\n  } else {\n    var stride = simpleGeometry.getStride();\n    return transform2D(\n      flatCoordinates, 0, flatCoordinates.length, stride,\n      transform, opt_dest);\n  }\n}\n\nexport default SimpleGeometry;\n\n//# sourceMappingURL=SimpleGeometry.js.map","/**\n * @module ol/geom/flat/area\n */\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRing(flatCoordinates, offset, end, stride) {\n  var twiceArea = 0;\n  var x1 = flatCoordinates[end - stride];\n  var y1 = flatCoordinates[end - stride + 1];\n  for (; offset < end; offset += stride) {\n    var x2 = flatCoordinates[offset];\n    var y2 = flatCoordinates[offset + 1];\n    twiceArea += y1 * x2 - x1 * y2;\n    x1 = x2;\n    y1 = y2;\n  }\n  return twiceArea / 2;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRings(flatCoordinates, offset, ends, stride) {\n  var area = 0;\n  for (var i = 0, ii = ends.length; i < ii; ++i) {\n    var end = ends[i];\n    area += linearRing(flatCoordinates, offset, end, stride);\n    offset = end;\n  }\n  return area;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRingss(flatCoordinates, offset, endss, stride) {\n  var area = 0;\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    var ends = endss[i];\n    area += linearRings(flatCoordinates, offset, ends, stride);\n    offset = ends[ends.length - 1];\n  }\n  return area;\n}\n\n//# sourceMappingURL=area.js.map","/**\n * @module ol/geom/flat/closest\n */\nimport {lerp, squaredDistance as squaredDx} from '../../math.js';\n\n\n/**\n * Returns the point on the 2D line segment flatCoordinates[offset1] to\n * flatCoordinates[offset2] that is closest to the point (x, y).  Extra\n * dimensions are linearly interpolated.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset1 Offset 1.\n * @param {number} offset2 Offset 2.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array<number>} closestPoint Closest point.\n */\nfunction assignClosest(flatCoordinates, offset1, offset2, stride, x, y, closestPoint) {\n  var x1 = flatCoordinates[offset1];\n  var y1 = flatCoordinates[offset1 + 1];\n  var dx = flatCoordinates[offset2] - x1;\n  var dy = flatCoordinates[offset2 + 1] - y1;\n  var offset;\n  if (dx === 0 && dy === 0) {\n    offset = offset1;\n  } else {\n    var t = ((x - x1) * dx + (y - y1) * dy) / (dx * dx + dy * dy);\n    if (t > 1) {\n      offset = offset2;\n    } else if (t > 0) {\n      for (var i = 0; i < stride; ++i) {\n        closestPoint[i] = lerp(flatCoordinates[offset1 + i],\n          flatCoordinates[offset2 + i], t);\n      }\n      closestPoint.length = stride;\n      return;\n    } else {\n      offset = offset1;\n    }\n  }\n  for (var i$1 = 0; i$1 < stride; ++i$1) {\n    closestPoint[i$1] = flatCoordinates[offset + i$1];\n  }\n  closestPoint.length = stride;\n}\n\n\n/**\n * Return the squared of the largest distance between any pair of consecutive\n * coordinates.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function maxSquaredDelta(flatCoordinates, offset, end, stride, max) {\n  var x1 = flatCoordinates[offset];\n  var y1 = flatCoordinates[offset + 1];\n  for (offset += stride; offset < end; offset += stride) {\n    var x2 = flatCoordinates[offset];\n    var y2 = flatCoordinates[offset + 1];\n    var squaredDelta = squaredDx(x1, y1, x2, y2);\n    if (squaredDelta > max) {\n      max = squaredDelta;\n    }\n    x1 = x2;\n    y1 = y2;\n  }\n  return max;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function arrayMaxSquaredDelta(flatCoordinates, offset, ends, stride, max) {\n  for (var i = 0, ii = ends.length; i < ii; ++i) {\n    var end = ends[i];\n    max = maxSquaredDelta(\n      flatCoordinates, offset, end, stride, max);\n    offset = end;\n  }\n  return max;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function multiArrayMaxSquaredDelta(flatCoordinates, offset, endss, stride, max) {\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    var ends = endss[i];\n    max = arrayMaxSquaredDelta(\n      flatCoordinates, offset, ends, stride, max);\n    offset = ends[ends.length - 1];\n  }\n  return max;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array<number>} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array<number>=} opt_tmpPoint Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestPoint(flatCoordinates, offset, end,\n  stride, maxDelta, isRing, x, y, closestPoint, minSquaredDistance,\n  opt_tmpPoint) {\n  if (offset == end) {\n    return minSquaredDistance;\n  }\n  var i, squaredDistance;\n  if (maxDelta === 0) {\n    // All points are identical, so just test the first point.\n    squaredDistance = squaredDx(\n      x, y, flatCoordinates[offset], flatCoordinates[offset + 1]);\n    if (squaredDistance < minSquaredDistance) {\n      for (i = 0; i < stride; ++i) {\n        closestPoint[i] = flatCoordinates[offset + i];\n      }\n      closestPoint.length = stride;\n      return squaredDistance;\n    } else {\n      return minSquaredDistance;\n    }\n  }\n  var tmpPoint = opt_tmpPoint ? opt_tmpPoint : [NaN, NaN];\n  var index = offset + stride;\n  while (index < end) {\n    assignClosest(\n      flatCoordinates, index - stride, index, stride, x, y, tmpPoint);\n    squaredDistance = squaredDx(x, y, tmpPoint[0], tmpPoint[1]);\n    if (squaredDistance < minSquaredDistance) {\n      minSquaredDistance = squaredDistance;\n      for (i = 0; i < stride; ++i) {\n        closestPoint[i] = tmpPoint[i];\n      }\n      closestPoint.length = stride;\n      index += stride;\n    } else {\n      // Skip ahead multiple points, because we know that all the skipped\n      // points cannot be any closer than the closest point we have found so\n      // far.  We know this because we know how close the current point is, how\n      // close the closest point we have found so far is, and the maximum\n      // distance between consecutive points.  For example, if we're currently\n      // at distance 10, the best we've found so far is 3, and that the maximum\n      // distance between consecutive points is 2, then we'll need to skip at\n      // least (10 - 3) / 2 == 3 (rounded down) points to have any chance of\n      // finding a closer point.  We use Math.max(..., 1) to ensure that we\n      // always advance at least one point, to avoid an infinite loop.\n      index += stride * Math.max(\n        ((Math.sqrt(squaredDistance) -\n            Math.sqrt(minSquaredDistance)) / maxDelta) | 0, 1);\n    }\n  }\n  if (isRing) {\n    // Check the closing segment.\n    assignClosest(\n      flatCoordinates, end - stride, offset, stride, x, y, tmpPoint);\n    squaredDistance = squaredDx(x, y, tmpPoint[0], tmpPoint[1]);\n    if (squaredDistance < minSquaredDistance) {\n      minSquaredDistance = squaredDistance;\n      for (i = 0; i < stride; ++i) {\n        closestPoint[i] = tmpPoint[i];\n      }\n      closestPoint.length = stride;\n    }\n  }\n  return minSquaredDistance;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array<number>} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array<number>=} opt_tmpPoint Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestArrayPoint(flatCoordinates, offset, ends,\n  stride, maxDelta, isRing, x, y, closestPoint, minSquaredDistance,\n  opt_tmpPoint) {\n  var tmpPoint = opt_tmpPoint ? opt_tmpPoint : [NaN, NaN];\n  for (var i = 0, ii = ends.length; i < ii; ++i) {\n    var end = ends[i];\n    minSquaredDistance = assignClosestPoint(\n      flatCoordinates, offset, end, stride,\n      maxDelta, isRing, x, y, closestPoint, minSquaredDistance, tmpPoint);\n    offset = end;\n  }\n  return minSquaredDistance;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array<number>} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array<number>=} opt_tmpPoint Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestMultiArrayPoint(flatCoordinates, offset,\n  endss, stride, maxDelta, isRing, x, y, closestPoint, minSquaredDistance,\n  opt_tmpPoint) {\n  var tmpPoint = opt_tmpPoint ? opt_tmpPoint : [NaN, NaN];\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    var ends = endss[i];\n    minSquaredDistance = assignClosestArrayPoint(\n      flatCoordinates, offset, ends, stride,\n      maxDelta, isRing, x, y, closestPoint, minSquaredDistance, tmpPoint);\n    offset = ends[ends.length - 1];\n  }\n  return minSquaredDistance;\n}\n\n//# sourceMappingURL=closest.js.map","/**\n * @module ol/geom/flat/deflate\n */\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {number} stride Stride.\n * @return {number} offset Offset.\n */\nexport function deflateCoordinate(flatCoordinates, offset, coordinate, stride) {\n  for (var i = 0, ii = coordinate.length; i < ii; ++i) {\n    flatCoordinates[offset++] = coordinate[i];\n  }\n  return offset;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<import(\"../../coordinate.js\").Coordinate>} coordinates Coordinates.\n * @param {number} stride Stride.\n * @return {number} offset Offset.\n */\nexport function deflateCoordinates(flatCoordinates, offset, coordinates, stride) {\n  for (var i = 0, ii = coordinates.length; i < ii; ++i) {\n    var coordinate = coordinates[i];\n    for (var j = 0; j < stride; ++j) {\n      flatCoordinates[offset++] = coordinate[j];\n    }\n  }\n  return offset;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<import(\"../../coordinate.js\").Coordinate>>} coordinatess Coordinatess.\n * @param {number} stride Stride.\n * @param {Array<number>=} opt_ends Ends.\n * @return {Array<number>} Ends.\n */\nexport function deflateCoordinatesArray(flatCoordinates, offset, coordinatess, stride, opt_ends) {\n  var ends = opt_ends ? opt_ends : [];\n  var i = 0;\n  for (var j = 0, jj = coordinatess.length; j < jj; ++j) {\n    var end = deflateCoordinates(\n      flatCoordinates, offset, coordinatess[j], stride);\n    ends[i++] = end;\n    offset = end;\n  }\n  ends.length = i;\n  return ends;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<Array<import(\"../../coordinate.js\").Coordinate>>>} coordinatesss Coordinatesss.\n * @param {number} stride Stride.\n * @param {Array<Array<number>>=} opt_endss Endss.\n * @return {Array<Array<number>>} Endss.\n */\nexport function deflateMultiCoordinatesArray(flatCoordinates, offset, coordinatesss, stride, opt_endss) {\n  var endss = opt_endss ? opt_endss : [];\n  var i = 0;\n  for (var j = 0, jj = coordinatesss.length; j < jj; ++j) {\n    var ends = deflateCoordinatesArray(\n      flatCoordinates, offset, coordinatesss[j], stride, endss[i]);\n    endss[i++] = ends;\n    offset = ends[ends.length - 1];\n  }\n  endss.length = i;\n  return endss;\n}\n\n//# sourceMappingURL=deflate.js.map","/**\n * @module ol/geom/flat/inflate\n */\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {Array<import(\"../../coordinate.js\").Coordinate>=} opt_coordinates Coordinates.\n * @return {Array<import(\"../../coordinate.js\").Coordinate>} Coordinates.\n */\nexport function inflateCoordinates(flatCoordinates, offset, end, stride, opt_coordinates) {\n  var coordinates = opt_coordinates !== undefined ? opt_coordinates : [];\n  var i = 0;\n  for (var j = offset; j < end; j += stride) {\n    coordinates[i++] = flatCoordinates.slice(j, j + stride);\n  }\n  coordinates.length = i;\n  return coordinates;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {Array<Array<import(\"../../coordinate.js\").Coordinate>>=} opt_coordinatess Coordinatess.\n * @return {Array<Array<import(\"../../coordinate.js\").Coordinate>>} Coordinatess.\n */\nexport function inflateCoordinatesArray(flatCoordinates, offset, ends, stride, opt_coordinatess) {\n  var coordinatess = opt_coordinatess !== undefined ? opt_coordinatess : [];\n  var i = 0;\n  for (var j = 0, jj = ends.length; j < jj; ++j) {\n    var end = ends[j];\n    coordinatess[i++] = inflateCoordinates(\n      flatCoordinates, offset, end, stride, coordinatess[i]);\n    offset = end;\n  }\n  coordinatess.length = i;\n  return coordinatess;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {Array<Array<Array<import(\"../../coordinate.js\").Coordinate>>>=} opt_coordinatesss\n *     Coordinatesss.\n * @return {Array<Array<Array<import(\"../../coordinate.js\").Coordinate>>>} Coordinatesss.\n */\nexport function inflateMultiCoordinatesArray(flatCoordinates, offset, endss, stride, opt_coordinatesss) {\n  var coordinatesss = opt_coordinatesss !== undefined ? opt_coordinatesss : [];\n  var i = 0;\n  for (var j = 0, jj = endss.length; j < jj; ++j) {\n    var ends = endss[j];\n    coordinatesss[i++] = inflateCoordinatesArray(\n      flatCoordinates, offset, ends, stride, coordinatesss[i]);\n    offset = ends[ends.length - 1];\n  }\n  coordinatesss.length = i;\n  return coordinatesss;\n}\n\n//# sourceMappingURL=inflate.js.map","/**\n * @module ol/geom/flat/simplify\n */\n// Based on simplify-js https://github.com/mourner/simplify-js\n// Copyright (c) 2012, Vladimir Agafonkin\n// All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are met:\n//\n//    1. Redistributions of source code must retain the above copyright notice,\n//       this list of conditions and the following disclaimer.\n//\n//    2. Redistributions in binary form must reproduce the above copyright\n//       notice, this list of conditions and the following disclaimer in the\n//       documentation and/or other materials provided with the distribution.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\"\n// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\n// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\n// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE\n// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\n// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\n// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS\n// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\n// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\n// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE\n// POSSIBILITY OF SUCH DAMAGE.\n\nimport {squaredSegmentDistance, squaredDistance} from '../../math.js';\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {boolean} highQuality Highest quality.\n * @param {Array<number>=} opt_simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @return {Array<number>} Simplified line string.\n */\nexport function simplifyLineString(flatCoordinates, offset, end,\n  stride, squaredTolerance, highQuality, opt_simplifiedFlatCoordinates) {\n  var simplifiedFlatCoordinates = opt_simplifiedFlatCoordinates !== undefined ?\n    opt_simplifiedFlatCoordinates : [];\n  if (!highQuality) {\n    end = radialDistance(flatCoordinates, offset, end,\n      stride, squaredTolerance,\n      simplifiedFlatCoordinates, 0);\n    flatCoordinates = simplifiedFlatCoordinates;\n    offset = 0;\n    stride = 2;\n  }\n  simplifiedFlatCoordinates.length = douglasPeucker(\n    flatCoordinates, offset, end, stride, squaredTolerance,\n    simplifiedFlatCoordinates, 0);\n  return simplifiedFlatCoordinates;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function douglasPeucker(flatCoordinates, offset, end,\n  stride, squaredTolerance, simplifiedFlatCoordinates, simplifiedOffset) {\n  var n = (end - offset) / stride;\n  if (n < 3) {\n    for (; offset < end; offset += stride) {\n      simplifiedFlatCoordinates[simplifiedOffset++] =\n          flatCoordinates[offset];\n      simplifiedFlatCoordinates[simplifiedOffset++] =\n          flatCoordinates[offset + 1];\n    }\n    return simplifiedOffset;\n  }\n  /** @type {Array<number>} */\n  var markers = new Array(n);\n  markers[0] = 1;\n  markers[n - 1] = 1;\n  /** @type {Array<number>} */\n  var stack = [offset, end - stride];\n  var index = 0;\n  while (stack.length > 0) {\n    var last = stack.pop();\n    var first = stack.pop();\n    var maxSquaredDistance = 0;\n    var x1 = flatCoordinates[first];\n    var y1 = flatCoordinates[first + 1];\n    var x2 = flatCoordinates[last];\n    var y2 = flatCoordinates[last + 1];\n    for (var i = first + stride; i < last; i += stride) {\n      var x = flatCoordinates[i];\n      var y = flatCoordinates[i + 1];\n      var squaredDistance = squaredSegmentDistance(\n        x, y, x1, y1, x2, y2);\n      if (squaredDistance > maxSquaredDistance) {\n        index = i;\n        maxSquaredDistance = squaredDistance;\n      }\n    }\n    if (maxSquaredDistance > squaredTolerance) {\n      markers[(index - offset) / stride] = 1;\n      if (first + stride < index) {\n        stack.push(first, index);\n      }\n      if (index + stride < last) {\n        stack.push(index, last);\n      }\n    }\n  }\n  for (var i$1 = 0; i$1 < n; ++i$1) {\n    if (markers[i$1]) {\n      simplifiedFlatCoordinates[simplifiedOffset++] =\n          flatCoordinates[offset + i$1 * stride];\n      simplifiedFlatCoordinates[simplifiedOffset++] =\n          flatCoordinates[offset + i$1 * stride + 1];\n    }\n  }\n  return simplifiedOffset;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array<number>} simplifiedEnds Simplified ends.\n * @return {number} Simplified offset.\n */\nexport function douglasPeuckerArray(flatCoordinates, offset,\n  ends, stride, squaredTolerance, simplifiedFlatCoordinates,\n  simplifiedOffset, simplifiedEnds) {\n  for (var i = 0, ii = ends.length; i < ii; ++i) {\n    var end = ends[i];\n    simplifiedOffset = douglasPeucker(\n      flatCoordinates, offset, end, stride, squaredTolerance,\n      simplifiedFlatCoordinates, simplifiedOffset);\n    simplifiedEnds.push(simplifiedOffset);\n    offset = end;\n  }\n  return simplifiedOffset;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array<Array<number>>} simplifiedEndss Simplified endss.\n * @return {number} Simplified offset.\n */\nexport function douglasPeuckerMultiArray(\n  flatCoordinates, offset, endss, stride, squaredTolerance,\n  simplifiedFlatCoordinates, simplifiedOffset, simplifiedEndss) {\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    var ends = endss[i];\n    var simplifiedEnds = [];\n    simplifiedOffset = douglasPeuckerArray(\n      flatCoordinates, offset, ends, stride, squaredTolerance,\n      simplifiedFlatCoordinates, simplifiedOffset, simplifiedEnds);\n    simplifiedEndss.push(simplifiedEnds);\n    offset = ends[ends.length - 1];\n  }\n  return simplifiedOffset;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function radialDistance(flatCoordinates, offset, end,\n  stride, squaredTolerance, simplifiedFlatCoordinates, simplifiedOffset) {\n  if (end <= offset + stride) {\n    // zero or one point, no simplification possible, so copy and return\n    for (; offset < end; offset += stride) {\n      simplifiedFlatCoordinates[simplifiedOffset++] = flatCoordinates[offset];\n      simplifiedFlatCoordinates[simplifiedOffset++] =\n          flatCoordinates[offset + 1];\n    }\n    return simplifiedOffset;\n  }\n  var x1 = flatCoordinates[offset];\n  var y1 = flatCoordinates[offset + 1];\n  // copy first point\n  simplifiedFlatCoordinates[simplifiedOffset++] = x1;\n  simplifiedFlatCoordinates[simplifiedOffset++] = y1;\n  var x2 = x1;\n  var y2 = y1;\n  for (offset += stride; offset < end; offset += stride) {\n    x2 = flatCoordinates[offset];\n    y2 = flatCoordinates[offset + 1];\n    if (squaredDistance(x1, y1, x2, y2) > squaredTolerance) {\n      // copy point at offset\n      simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n      simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n      x1 = x2;\n      y1 = y2;\n    }\n  }\n  if (x2 != x1 || y2 != y1) {\n    // copy last point\n    simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n    simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n  }\n  return simplifiedOffset;\n}\n\n\n/**\n * @param {number} value Value.\n * @param {number} tolerance Tolerance.\n * @return {number} Rounded value.\n */\nexport function snap(value, tolerance) {\n  return tolerance * Math.round(value / tolerance);\n}\n\n\n/**\n * Simplifies a line string using an algorithm designed by Tim Schaub.\n * Coordinates are snapped to the nearest value in a virtual grid and\n * consecutive duplicate coordinates are discarded.  This effectively preserves\n * topology as the simplification of any subsection of a line string is\n * independent of the rest of the line string.  This means that, for examples,\n * the common edge between two polygons will be simplified to the same line\n * string independently in both polygons.  This implementation uses a single\n * pass over the coordinates and eliminates intermediate collinear points.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function quantize(flatCoordinates, offset, end, stride,\n  tolerance, simplifiedFlatCoordinates, simplifiedOffset) {\n  // do nothing if the line is empty\n  if (offset == end) {\n    return simplifiedOffset;\n  }\n  // snap the first coordinate (P1)\n  var x1 = snap(flatCoordinates[offset], tolerance);\n  var y1 = snap(flatCoordinates[offset + 1], tolerance);\n  offset += stride;\n  // add the first coordinate to the output\n  simplifiedFlatCoordinates[simplifiedOffset++] = x1;\n  simplifiedFlatCoordinates[simplifiedOffset++] = y1;\n  // find the next coordinate that does not snap to the same value as the first\n  // coordinate (P2)\n  var x2, y2;\n  do {\n    x2 = snap(flatCoordinates[offset], tolerance);\n    y2 = snap(flatCoordinates[offset + 1], tolerance);\n    offset += stride;\n    if (offset == end) {\n      // all coordinates snap to the same value, the line collapses to a point\n      // push the last snapped value anyway to ensure that the output contains\n      // at least two points\n      // FIXME should we really return at least two points anyway?\n      simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n      simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n      return simplifiedOffset;\n    }\n  } while (x2 == x1 && y2 == y1);\n  while (offset < end) {\n    // snap the next coordinate (P3)\n    var x3 = snap(flatCoordinates[offset], tolerance);\n    var y3 = snap(flatCoordinates[offset + 1], tolerance);\n    offset += stride;\n    // skip P3 if it is equal to P2\n    if (x3 == x2 && y3 == y2) {\n      continue;\n    }\n    // calculate the delta between P1 and P2\n    var dx1 = x2 - x1;\n    var dy1 = y2 - y1;\n    // calculate the delta between P3 and P1\n    var dx2 = x3 - x1;\n    var dy2 = y3 - y1;\n    // if P1, P2, and P3 are colinear and P3 is further from P1 than P2 is from\n    // P1 in the same direction then P2 is on the straight line between P1 and\n    // P3\n    if ((dx1 * dy2 == dy1 * dx2) &&\n        ((dx1 < 0 && dx2 < dx1) || dx1 == dx2 || (dx1 > 0 && dx2 > dx1)) &&\n        ((dy1 < 0 && dy2 < dy1) || dy1 == dy2 || (dy1 > 0 && dy2 > dy1))) {\n      // discard P2 and set P2 = P3\n      x2 = x3;\n      y2 = y3;\n      continue;\n    }\n    // either P1, P2, and P3 are not colinear, or they are colinear but P3 is\n    // between P3 and P1 or on the opposite half of the line to P2.  add P2,\n    // and continue with P1 = P2 and P2 = P3\n    simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n    simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n    x1 = x2;\n    y1 = y2;\n    x2 = x3;\n    y2 = y3;\n  }\n  // add the last point (P2)\n  simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n  simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n  return simplifiedOffset;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array<number>} simplifiedEnds Simplified ends.\n * @return {number} Simplified offset.\n */\nexport function quantizeArray(\n  flatCoordinates, offset, ends, stride,\n  tolerance,\n  simplifiedFlatCoordinates, simplifiedOffset, simplifiedEnds) {\n  for (var i = 0, ii = ends.length; i < ii; ++i) {\n    var end = ends[i];\n    simplifiedOffset = quantize(\n      flatCoordinates, offset, end, stride,\n      tolerance,\n      simplifiedFlatCoordinates, simplifiedOffset);\n    simplifiedEnds.push(simplifiedOffset);\n    offset = end;\n  }\n  return simplifiedOffset;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array<number>} simplifiedFlatCoordinates Simplified flat\n *     coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array<Array<number>>} simplifiedEndss Simplified endss.\n * @return {number} Simplified offset.\n */\nexport function quantizeMultiArray(\n  flatCoordinates, offset, endss, stride,\n  tolerance,\n  simplifiedFlatCoordinates, simplifiedOffset, simplifiedEndss) {\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    var ends = endss[i];\n    var simplifiedEnds = [];\n    simplifiedOffset = quantizeArray(\n      flatCoordinates, offset, ends, stride,\n      tolerance,\n      simplifiedFlatCoordinates, simplifiedOffset, simplifiedEnds);\n    simplifiedEndss.push(simplifiedEnds);\n    offset = ends[ends.length - 1];\n  }\n  return simplifiedOffset;\n}\n\n//# sourceMappingURL=simplify.js.map","/**\n * @module ol/geom/LinearRing\n */\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport GeometryLayout from './GeometryLayout.js';\nimport GeometryType from './GeometryType.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {linearRing as linearRingArea} from './flat/area.js';\nimport {assignClosestPoint, maxSquaredDelta} from './flat/closest.js';\nimport {deflateCoordinates} from './flat/deflate.js';\nimport {inflateCoordinates} from './flat/inflate.js';\nimport {douglasPeucker} from './flat/simplify.js';\n\n/**\n * @classdesc\n * Linear ring geometry. Only used as part of polygon; cannot be rendered\n * on its own.\n *\n * @api\n */\nvar LinearRing = /*@__PURE__*/(function (SimpleGeometry) {\n  function LinearRing(coordinates, opt_layout) {\n\n    SimpleGeometry.call(this);\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDelta_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDeltaRevision_ = -1;\n\n    if (opt_layout !== undefined && !Array.isArray(coordinates[0])) {\n      this.setFlatCoordinates(opt_layout, /** @type {Array<number>} */ (coordinates));\n    } else {\n      this.setCoordinates(/** @type {Array<import(\"../coordinate.js\").Coordinate>} */ (coordinates), opt_layout);\n    }\n\n  }\n\n  if ( SimpleGeometry ) LinearRing.__proto__ = SimpleGeometry;\n  LinearRing.prototype = Object.create( SimpleGeometry && SimpleGeometry.prototype );\n  LinearRing.prototype.constructor = LinearRing;\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!LinearRing} Clone.\n   * @override\n   * @api\n   */\n  LinearRing.prototype.clone = function clone () {\n    return new LinearRing(this.flatCoordinates.slice(), this.layout);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  LinearRing.prototype.closestPointXY = function closestPointXY (x, y, closestPoint, minSquaredDistance) {\n    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n      return minSquaredDistance;\n    }\n    if (this.maxDeltaRevision_ != this.getRevision()) {\n      this.maxDelta_ = Math.sqrt(maxSquaredDelta(\n        this.flatCoordinates, 0, this.flatCoordinates.length, this.stride, 0));\n      this.maxDeltaRevision_ = this.getRevision();\n    }\n    return assignClosestPoint(\n      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,\n      this.maxDelta_, true, x, y, closestPoint, minSquaredDistance);\n  };\n\n  /**\n   * Return the area of the linear ring on projected plane.\n   * @return {number} Area (on projected plane).\n   * @api\n   */\n  LinearRing.prototype.getArea = function getArea () {\n    return linearRingArea(this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);\n  };\n\n  /**\n   * Return the coordinates of the linear ring.\n   * @return {Array<import(\"../coordinate.js\").Coordinate>} Coordinates.\n   * @override\n   * @api\n   */\n  LinearRing.prototype.getCoordinates = function getCoordinates () {\n    return inflateCoordinates(\n      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  LinearRing.prototype.getSimplifiedGeometryInternal = function getSimplifiedGeometryInternal (squaredTolerance) {\n    var simplifiedFlatCoordinates = [];\n    simplifiedFlatCoordinates.length = douglasPeucker(\n      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,\n      squaredTolerance, simplifiedFlatCoordinates, 0);\n    return new LinearRing(simplifiedFlatCoordinates, GeometryLayout.XY);\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  LinearRing.prototype.getType = function getType () {\n    return GeometryType.LINEAR_RING;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  LinearRing.prototype.intersectsExtent = function intersectsExtent (extent) {\n    return false;\n  };\n\n  /**\n   * Set the coordinates of the linear ring.\n   * @param {!Array<import(\"../coordinate.js\").Coordinate>} coordinates Coordinates.\n   * @param {GeometryLayout=} opt_layout Layout.\n   * @override\n   * @api\n   */\n  LinearRing.prototype.setCoordinates = function setCoordinates (coordinates, opt_layout) {\n    this.setLayout(opt_layout, coordinates, 1);\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = [];\n    }\n    this.flatCoordinates.length = deflateCoordinates(\n      this.flatCoordinates, 0, coordinates, this.stride);\n    this.changed();\n  };\n\n  return LinearRing;\n}(SimpleGeometry));\n\n\nexport default LinearRing;\n\n//# sourceMappingURL=LinearRing.js.map","/**\n * @module ol/geom/Point\n */\nimport {createOrUpdateFromCoordinate, containsXY} from '../extent.js';\nimport GeometryType from './GeometryType.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {deflateCoordinate} from './flat/deflate.js';\nimport {squaredDistance as squaredDx} from '../math.js';\n\n/**\n * @classdesc\n * Point geometry.\n *\n * @api\n */\nvar Point = /*@__PURE__*/(function (SimpleGeometry) {\n  function Point(coordinates, opt_layout) {\n    SimpleGeometry.call(this);\n    this.setCoordinates(coordinates, opt_layout);\n  }\n\n  if ( SimpleGeometry ) Point.__proto__ = SimpleGeometry;\n  Point.prototype = Object.create( SimpleGeometry && SimpleGeometry.prototype );\n  Point.prototype.constructor = Point;\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!Point} Clone.\n   * @override\n   * @api\n   */\n  Point.prototype.clone = function clone () {\n    var point = new Point(this.flatCoordinates.slice(), this.layout);\n    return point;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  Point.prototype.closestPointXY = function closestPointXY (x, y, closestPoint, minSquaredDistance) {\n    var flatCoordinates = this.flatCoordinates;\n    var squaredDistance = squaredDx(x, y, flatCoordinates[0], flatCoordinates[1]);\n    if (squaredDistance < minSquaredDistance) {\n      var stride = this.stride;\n      for (var i = 0; i < stride; ++i) {\n        closestPoint[i] = flatCoordinates[i];\n      }\n      closestPoint.length = stride;\n      return squaredDistance;\n    } else {\n      return minSquaredDistance;\n    }\n  };\n\n  /**\n   * Return the coordinate of the point.\n   * @return {import(\"../coordinate.js\").Coordinate} Coordinates.\n   * @override\n   * @api\n   */\n  Point.prototype.getCoordinates = function getCoordinates () {\n    return !this.flatCoordinates ? [] : this.flatCoordinates.slice();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  Point.prototype.computeExtent = function computeExtent (extent) {\n    return createOrUpdateFromCoordinate(this.flatCoordinates, extent);\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  Point.prototype.getType = function getType () {\n    return GeometryType.POINT;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  Point.prototype.intersectsExtent = function intersectsExtent (extent) {\n    return containsXY(extent, this.flatCoordinates[0], this.flatCoordinates[1]);\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  Point.prototype.setCoordinates = function setCoordinates (coordinates, opt_layout) {\n    this.setLayout(opt_layout, coordinates, 0);\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = [];\n    }\n    this.flatCoordinates.length = deflateCoordinate(\n      this.flatCoordinates, 0, coordinates, this.stride);\n    this.changed();\n  };\n\n  return Point;\n}(SimpleGeometry));\n\n\nexport default Point;\n\n//# sourceMappingURL=Point.js.map","/**\n * @module ol/geom/flat/contains\n */\nimport {forEachCorner} from '../../extent.js';\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} Contains extent.\n */\nexport function linearRingContainsExtent(flatCoordinates, offset, end, stride, extent) {\n  var outside = forEachCorner(extent,\n    /**\n     * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n     * @return {boolean} Contains (x, y).\n     */\n    function(coordinate) {\n      return !linearRingContainsXY(flatCoordinates, offset, end, stride, coordinate[0], coordinate[1]);\n    });\n  return !outside;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingContainsXY(flatCoordinates, offset, end, stride, x, y) {\n  // http://geomalgorithms.com/a03-_inclusion.html\n  // Copyright 2000 softSurfer, 2012 Dan Sunday\n  // This code may be freely used and modified for any purpose\n  // providing that this copyright notice is included with it.\n  // SoftSurfer makes no warranty for this code, and cannot be held\n  // liable for any real or imagined damage resulting from its use.\n  // Users of this code must verify correctness for their application.\n  var wn = 0;\n  var x1 = flatCoordinates[end - stride];\n  var y1 = flatCoordinates[end - stride + 1];\n  for (; offset < end; offset += stride) {\n    var x2 = flatCoordinates[offset];\n    var y2 = flatCoordinates[offset + 1];\n    if (y1 <= y) {\n      if (y2 > y && ((x2 - x1) * (y - y1)) - ((x - x1) * (y2 - y1)) > 0) {\n        wn++;\n      }\n    } else if (y2 <= y && ((x2 - x1) * (y - y1)) - ((x - x1) * (y2 - y1)) < 0) {\n      wn--;\n    }\n    x1 = x2;\n    y1 = y2;\n  }\n  return wn !== 0;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingsContainsXY(flatCoordinates, offset, ends, stride, x, y) {\n  if (ends.length === 0) {\n    return false;\n  }\n  if (!linearRingContainsXY(flatCoordinates, offset, ends[0], stride, x, y)) {\n    return false;\n  }\n  for (var i = 1, ii = ends.length; i < ii; ++i) {\n    if (linearRingContainsXY(flatCoordinates, ends[i - 1], ends[i], stride, x, y)) {\n      return false;\n    }\n  }\n  return true;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingssContainsXY(flatCoordinates, offset, endss, stride, x, y) {\n  if (endss.length === 0) {\n    return false;\n  }\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    var ends = endss[i];\n    if (linearRingsContainsXY(flatCoordinates, offset, ends, stride, x, y)) {\n      return true;\n    }\n    offset = ends[ends.length - 1];\n  }\n  return false;\n}\n\n//# sourceMappingURL=contains.js.map","/**\n * @module ol/geom/flat/interiorpoint\n */\nimport {numberSafeCompareFunction} from '../../array.js';\nimport {linearRingsContainsXY} from './contains.js';\n\n\n/**\n * Calculates a point that is likely to lie in the interior of the linear rings.\n * Inspired by JTS's com.vividsolutions.jts.geom.Geometry#getInteriorPoint.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {Array<number>} flatCenters Flat centers.\n * @param {number} flatCentersOffset Flat center offset.\n * @param {Array<number>=} opt_dest Destination.\n * @return {Array<number>} Destination point as XYM coordinate, where M is the\n * length of the horizontal intersection that the point belongs to.\n */\nexport function getInteriorPointOfArray(flatCoordinates, offset,\n  ends, stride, flatCenters, flatCentersOffset, opt_dest) {\n  var i, ii, x, x1, x2, y1, y2;\n  var y = flatCenters[flatCentersOffset + 1];\n  /** @type {Array<number>} */\n  var intersections = [];\n  // Calculate intersections with the horizontal line\n  for (var r = 0, rr = ends.length; r < rr; ++r) {\n    var end = ends[r];\n    x1 = flatCoordinates[end - stride];\n    y1 = flatCoordinates[end - stride + 1];\n    for (i = offset; i < end; i += stride) {\n      x2 = flatCoordinates[i];\n      y2 = flatCoordinates[i + 1];\n      if ((y <= y1 && y2 <= y) || (y1 <= y && y <= y2)) {\n        x = (y - y1) / (y2 - y1) * (x2 - x1) + x1;\n        intersections.push(x);\n      }\n      x1 = x2;\n      y1 = y2;\n    }\n  }\n  // Find the longest segment of the horizontal line that has its center point\n  // inside the linear ring.\n  var pointX = NaN;\n  var maxSegmentLength = -Infinity;\n  intersections.sort(numberSafeCompareFunction);\n  x1 = intersections[0];\n  for (i = 1, ii = intersections.length; i < ii; ++i) {\n    x2 = intersections[i];\n    var segmentLength = Math.abs(x2 - x1);\n    if (segmentLength > maxSegmentLength) {\n      x = (x1 + x2) / 2;\n      if (linearRingsContainsXY(flatCoordinates, offset, ends, stride, x, y)) {\n        pointX = x;\n        maxSegmentLength = segmentLength;\n      }\n    }\n    x1 = x2;\n  }\n  if (isNaN(pointX)) {\n    // There is no horizontal line that has its center point inside the linear\n    // ring.  Use the center of the the linear ring's extent.\n    pointX = flatCenters[flatCentersOffset];\n  }\n  if (opt_dest) {\n    opt_dest.push(pointX, y, maxSegmentLength);\n    return opt_dest;\n  } else {\n    return [pointX, y, maxSegmentLength];\n  }\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {Array<number>} flatCenters Flat centers.\n * @return {Array<number>} Interior points as XYM coordinates, where M is the\n * length of the horizontal intersection that the point belongs to.\n */\nexport function getInteriorPointsOfMultiArray(flatCoordinates, offset, endss, stride, flatCenters) {\n  var interiorPoints = [];\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    var ends = endss[i];\n    interiorPoints = getInteriorPointOfArray(flatCoordinates,\n      offset, ends, stride, flatCenters, 2 * i, interiorPoints);\n    offset = ends[ends.length - 1];\n  }\n  return interiorPoints;\n}\n\n//# sourceMappingURL=interiorpoint.js.map","/**\n * @module ol/geom/flat/segments\n */\n\n\n/**\n * This function calls `callback` for each segment of the flat coordinates\n * array. If the callback returns a truthy value the function returns that\n * value immediately. Otherwise the function returns `false`.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {function(this: S, import(\"../../coordinate.js\").Coordinate, import(\"../../coordinate.js\").Coordinate): T} callback Function\n *     called for each segment.\n * @param {S=} opt_this The object to be used as the value of 'this'\n *     within callback.\n * @return {T|boolean} Value.\n * @template T,S\n */\nexport function forEach(flatCoordinates, offset, end, stride, callback, opt_this) {\n  var point1 = [flatCoordinates[offset], flatCoordinates[offset + 1]];\n  var point2 = [];\n  var ret;\n  for (; (offset + stride) < end; offset += stride) {\n    point2[0] = flatCoordinates[offset + stride];\n    point2[1] = flatCoordinates[offset + stride + 1];\n    ret = callback.call(opt_this, point1, point2);\n    if (ret) {\n      return ret;\n    }\n    point1[0] = point2[0];\n    point1[1] = point2[1];\n  }\n  return false;\n}\n\n//# sourceMappingURL=segments.js.map","/**\n * @module ol/geom/flat/intersectsextent\n */\nimport {containsExtent, createEmpty, extendFlatCoordinates, intersects, intersectsSegment} from '../../extent.js';\nimport {linearRingContainsXY, linearRingContainsExtent} from './contains.js';\nimport {forEach as forEachSegment} from './segments.js';\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLineString(flatCoordinates, offset, end, stride, extent) {\n  var coordinatesExtent = extendFlatCoordinates(\n    createEmpty(), flatCoordinates, offset, end, stride);\n  if (!intersects(extent, coordinatesExtent)) {\n    return false;\n  }\n  if (containsExtent(extent, coordinatesExtent)) {\n    return true;\n  }\n  if (coordinatesExtent[0] >= extent[0] &&\n      coordinatesExtent[2] <= extent[2]) {\n    return true;\n  }\n  if (coordinatesExtent[1] >= extent[1] &&\n      coordinatesExtent[3] <= extent[3]) {\n    return true;\n  }\n  return forEachSegment(flatCoordinates, offset, end, stride,\n    /**\n     * @param {import(\"../../coordinate.js\").Coordinate} point1 Start point.\n     * @param {import(\"../../coordinate.js\").Coordinate} point2 End point.\n     * @return {boolean} `true` if the segment and the extent intersect,\n     *     `false` otherwise.\n     */\n    function(point1, point2) {\n      return intersectsSegment(extent, point1, point2);\n    });\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLineStringArray(flatCoordinates, offset, ends, stride, extent) {\n  for (var i = 0, ii = ends.length; i < ii; ++i) {\n    if (intersectsLineString(\n      flatCoordinates, offset, ends[i], stride, extent)) {\n      return true;\n    }\n    offset = ends[i];\n  }\n  return false;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRing(flatCoordinates, offset, end, stride, extent) {\n  if (intersectsLineString(\n    flatCoordinates, offset, end, stride, extent)) {\n    return true;\n  }\n  if (linearRingContainsXY(flatCoordinates, offset, end, stride, extent[0], extent[1])) {\n    return true;\n  }\n  if (linearRingContainsXY(flatCoordinates, offset, end, stride, extent[0], extent[3])) {\n    return true;\n  }\n  if (linearRingContainsXY(flatCoordinates, offset, end, stride, extent[2], extent[1])) {\n    return true;\n  }\n  if (linearRingContainsXY(flatCoordinates, offset, end, stride, extent[2], extent[3])) {\n    return true;\n  }\n  return false;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRingArray(flatCoordinates, offset, ends, stride, extent) {\n  if (!intersectsLinearRing(\n    flatCoordinates, offset, ends[0], stride, extent)) {\n    return false;\n  }\n  if (ends.length === 1) {\n    return true;\n  }\n  for (var i = 1, ii = ends.length; i < ii; ++i) {\n    if (linearRingContainsExtent(flatCoordinates, ends[i - 1], ends[i], stride, extent)) {\n      if (!intersectsLineString(flatCoordinates, ends[i - 1], ends[i], stride, extent)) {\n        return false;\n      }\n    }\n  }\n  return true;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {import(\"../../extent.js\").Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRingMultiArray(flatCoordinates, offset, endss, stride, extent) {\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    var ends = endss[i];\n    if (intersectsLinearRingArray(\n      flatCoordinates, offset, ends, stride, extent)) {\n      return true;\n    }\n    offset = ends[ends.length - 1];\n  }\n  return false;\n}\n\n//# sourceMappingURL=intersectsextent.js.map","/**\n * @module ol/geom/flat/reverse\n */\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n */\nexport function coordinates(flatCoordinates, offset, end, stride) {\n  while (offset < end - stride) {\n    for (var i = 0; i < stride; ++i) {\n      var tmp = flatCoordinates[offset + i];\n      flatCoordinates[offset + i] = flatCoordinates[end - stride + i];\n      flatCoordinates[end - stride + i] = tmp;\n    }\n    offset += stride;\n    end -= stride;\n  }\n}\n\n//# sourceMappingURL=reverse.js.map","/**\n * @module ol/geom/flat/orient\n */\nimport {coordinates as reverseCoordinates} from './reverse.js';\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {boolean} Is clockwise.\n */\nexport function linearRingIsClockwise(flatCoordinates, offset, end, stride) {\n  // http://tinyurl.com/clockwise-method\n  // https://github.com/OSGeo/gdal/blob/trunk/gdal/ogr/ogrlinearring.cpp\n  var edge = 0;\n  var x1 = flatCoordinates[end - stride];\n  var y1 = flatCoordinates[end - stride + 1];\n  for (; offset < end; offset += stride) {\n    var x2 = flatCoordinates[offset];\n    var y2 = flatCoordinates[offset + 1];\n    edge += (x2 - x1) * (y2 + y1);\n    x1 = x2;\n    y1 = y2;\n  }\n  return edge > 0;\n}\n\n\n/**\n * Determines if linear rings are oriented.  By default, left-hand orientation\n * is tested (first ring must be clockwise, remaining rings counter-clockwise).\n * To test for right-hand orientation, use the `opt_right` argument.\n *\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean=} opt_right Test for right-hand orientation\n *     (counter-clockwise exterior ring and clockwise interior rings).\n * @return {boolean} Rings are correctly oriented.\n */\nexport function linearRingIsOriented(flatCoordinates, offset, ends, stride, opt_right) {\n  var right = opt_right !== undefined ? opt_right : false;\n  for (var i = 0, ii = ends.length; i < ii; ++i) {\n    var end = ends[i];\n    var isClockwise = linearRingIsClockwise(\n      flatCoordinates, offset, end, stride);\n    if (i === 0) {\n      if ((right && isClockwise) || (!right && !isClockwise)) {\n        return false;\n      }\n    } else {\n      if ((right && !isClockwise) || (!right && isClockwise)) {\n        return false;\n      }\n    }\n    offset = end;\n  }\n  return true;\n}\n\n\n/**\n * Determines if linear rings are oriented.  By default, left-hand orientation\n * is tested (first ring must be clockwise, remaining rings counter-clockwise).\n * To test for right-hand orientation, use the `opt_right` argument.\n *\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Array of array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean=} opt_right Test for right-hand orientation\n *     (counter-clockwise exterior ring and clockwise interior rings).\n * @return {boolean} Rings are correctly oriented.\n */\nexport function linearRingsAreOriented(flatCoordinates, offset, endss, stride, opt_right) {\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    if (!linearRingIsOriented(\n      flatCoordinates, offset, endss[i], stride, opt_right)) {\n      return false;\n    }\n  }\n  return true;\n}\n\n\n/**\n * Orient coordinates in a flat array of linear rings.  By default, rings\n * are oriented following the left-hand rule (clockwise for exterior and\n * counter-clockwise for interior rings).  To orient according to the\n * right-hand rule, use the `opt_right` argument.\n *\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {boolean=} opt_right Follow the right-hand rule for orientation.\n * @return {number} End.\n */\nexport function orientLinearRings(flatCoordinates, offset, ends, stride, opt_right) {\n  var right = opt_right !== undefined ? opt_right : false;\n  for (var i = 0, ii = ends.length; i < ii; ++i) {\n    var end = ends[i];\n    var isClockwise = linearRingIsClockwise(\n      flatCoordinates, offset, end, stride);\n    var reverse = i === 0 ?\n      (right && isClockwise) || (!right && !isClockwise) :\n      (right && !isClockwise) || (!right && isClockwise);\n    if (reverse) {\n      reverseCoordinates(flatCoordinates, offset, end, stride);\n    }\n    offset = end;\n  }\n  return offset;\n}\n\n\n/**\n * Orient coordinates in a flat array of linear rings.  By default, rings\n * are oriented following the left-hand rule (clockwise for exterior and\n * counter-clockwise for interior rings).  To orient according to the\n * right-hand rule, use the `opt_right` argument.\n *\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Array of array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean=} opt_right Follow the right-hand rule for orientation.\n * @return {number} End.\n */\nexport function orientLinearRingsArray(flatCoordinates, offset, endss, stride, opt_right) {\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    offset = orientLinearRings(\n      flatCoordinates, offset, endss[i], stride, opt_right);\n  }\n  return offset;\n}\n\n//# sourceMappingURL=orient.js.map","/**\n * @module ol/geom/Polygon\n */\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY, getCenter} from '../extent.js';\nimport GeometryLayout from './GeometryLayout.js';\nimport GeometryType from './GeometryType.js';\nimport LinearRing from './LinearRing.js';\nimport Point from './Point.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {offset as sphereOffset} from '../sphere.js';\nimport {linearRings as linearRingsArea} from './flat/area.js';\nimport {assignClosestArrayPoint, arrayMaxSquaredDelta} from './flat/closest.js';\nimport {linearRingsContainsXY} from './flat/contains.js';\nimport {deflateCoordinatesArray} from './flat/deflate.js';\nimport {inflateCoordinatesArray} from './flat/inflate.js';\nimport {getInteriorPointOfArray} from './flat/interiorpoint.js';\nimport {intersectsLinearRingArray} from './flat/intersectsextent.js';\nimport {linearRingIsOriented, orientLinearRings} from './flat/orient.js';\nimport {quantizeArray} from './flat/simplify.js';\nimport {modulo} from '../math.js';\n\n/**\n * @classdesc\n * Polygon geometry.\n *\n * @api\n */\nvar Polygon = /*@__PURE__*/(function (SimpleGeometry) {\n  function Polygon(coordinates, opt_layout, opt_ends) {\n\n    SimpleGeometry.call(this);\n\n    /**\n     * @type {Array<number>}\n     * @private\n     */\n    this.ends_ = [];\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.flatInteriorPointRevision_ = -1;\n\n    /**\n     * @private\n     * @type {import(\"../coordinate.js\").Coordinate}\n     */\n    this.flatInteriorPoint_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDelta_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDeltaRevision_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.orientedRevision_ = -1;\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.orientedFlatCoordinates_ = null;\n\n    if (opt_layout !== undefined && opt_ends) {\n      this.setFlatCoordinates(opt_layout, /** @type {Array<number>} */ (coordinates));\n      this.ends_ = opt_ends;\n    } else {\n      this.setCoordinates(/** @type {Array<Array<import(\"../coordinate.js\").Coordinate>>} */ (coordinates), opt_layout);\n    }\n\n  }\n\n  if ( SimpleGeometry ) Polygon.__proto__ = SimpleGeometry;\n  Polygon.prototype = Object.create( SimpleGeometry && SimpleGeometry.prototype );\n  Polygon.prototype.constructor = Polygon;\n\n  /**\n   * Append the passed linear ring to this polygon.\n   * @param {LinearRing} linearRing Linear ring.\n   * @api\n   */\n  Polygon.prototype.appendLinearRing = function appendLinearRing (linearRing) {\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = linearRing.getFlatCoordinates().slice();\n    } else {\n      extend(this.flatCoordinates, linearRing.getFlatCoordinates());\n    }\n    this.ends_.push(this.flatCoordinates.length);\n    this.changed();\n  };\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!Polygon} Clone.\n   * @override\n   * @api\n   */\n  Polygon.prototype.clone = function clone () {\n    return new Polygon(this.flatCoordinates.slice(), this.layout, this.ends_.slice());\n  };\n\n  /**\n   * @inheritDoc\n   */\n  Polygon.prototype.closestPointXY = function closestPointXY (x, y, closestPoint, minSquaredDistance) {\n    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n      return minSquaredDistance;\n    }\n    if (this.maxDeltaRevision_ != this.getRevision()) {\n      this.maxDelta_ = Math.sqrt(arrayMaxSquaredDelta(\n        this.flatCoordinates, 0, this.ends_, this.stride, 0));\n      this.maxDeltaRevision_ = this.getRevision();\n    }\n    return assignClosestArrayPoint(\n      this.flatCoordinates, 0, this.ends_, this.stride,\n      this.maxDelta_, true, x, y, closestPoint, minSquaredDistance);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  Polygon.prototype.containsXY = function containsXY (x, y) {\n    return linearRingsContainsXY(this.getOrientedFlatCoordinates(), 0, this.ends_, this.stride, x, y);\n  };\n\n  /**\n   * Return the area of the polygon on projected plane.\n   * @return {number} Area (on projected plane).\n   * @api\n   */\n  Polygon.prototype.getArea = function getArea () {\n    return linearRingsArea(this.getOrientedFlatCoordinates(), 0, this.ends_, this.stride);\n  };\n\n  /**\n   * Get the coordinate array for this geometry.  This array has the structure\n   * of a GeoJSON coordinate array for polygons.\n   *\n   * @param {boolean=} opt_right Orient coordinates according to the right-hand\n   *     rule (counter-clockwise for exterior and clockwise for interior rings).\n   *     If `false`, coordinates will be oriented according to the left-hand rule\n   *     (clockwise for exterior and counter-clockwise for interior rings).\n   *     By default, coordinate orientation will depend on how the geometry was\n   *     constructed.\n   * @return {Array<Array<import(\"../coordinate.js\").Coordinate>>} Coordinates.\n   * @override\n   * @api\n   */\n  Polygon.prototype.getCoordinates = function getCoordinates (opt_right) {\n    var flatCoordinates;\n    if (opt_right !== undefined) {\n      flatCoordinates = this.getOrientedFlatCoordinates().slice();\n      orientLinearRings(\n        flatCoordinates, 0, this.ends_, this.stride, opt_right);\n    } else {\n      flatCoordinates = this.flatCoordinates;\n    }\n\n    return inflateCoordinatesArray(\n      flatCoordinates, 0, this.ends_, this.stride);\n  };\n\n  /**\n   * @return {Array<number>} Ends.\n   */\n  Polygon.prototype.getEnds = function getEnds () {\n    return this.ends_;\n  };\n\n  /**\n   * @return {Array<number>} Interior point.\n   */\n  Polygon.prototype.getFlatInteriorPoint = function getFlatInteriorPoint () {\n    if (this.flatInteriorPointRevision_ != this.getRevision()) {\n      var flatCenter = getCenter(this.getExtent());\n      this.flatInteriorPoint_ = getInteriorPointOfArray(\n        this.getOrientedFlatCoordinates(), 0, this.ends_, this.stride,\n        flatCenter, 0);\n      this.flatInteriorPointRevision_ = this.getRevision();\n    }\n    return this.flatInteriorPoint_;\n  };\n\n  /**\n   * Return an interior point of the polygon.\n   * @return {Point} Interior point as XYM coordinate, where M is the\n   * length of the horizontal intersection that the point belongs to.\n   * @api\n   */\n  Polygon.prototype.getInteriorPoint = function getInteriorPoint () {\n    return new Point(this.getFlatInteriorPoint(), GeometryLayout.XYM);\n  };\n\n  /**\n   * Return the number of rings of the polygon,  this includes the exterior\n   * ring and any interior rings.\n   *\n   * @return {number} Number of rings.\n   * @api\n   */\n  Polygon.prototype.getLinearRingCount = function getLinearRingCount () {\n    return this.ends_.length;\n  };\n\n  /**\n   * Return the Nth linear ring of the polygon geometry. Return `null` if the\n   * given index is out of range.\n   * The exterior linear ring is available at index `0` and the interior rings\n   * at index `1` and beyond.\n   *\n   * @param {number} index Index.\n   * @return {LinearRing} Linear ring.\n   * @api\n   */\n  Polygon.prototype.getLinearRing = function getLinearRing (index) {\n    if (index < 0 || this.ends_.length <= index) {\n      return null;\n    }\n    return new LinearRing(this.flatCoordinates.slice(\n      index === 0 ? 0 : this.ends_[index - 1], this.ends_[index]), this.layout);\n  };\n\n  /**\n   * Return the linear rings of the polygon.\n   * @return {Array<LinearRing>} Linear rings.\n   * @api\n   */\n  Polygon.prototype.getLinearRings = function getLinearRings () {\n    var layout = this.layout;\n    var flatCoordinates = this.flatCoordinates;\n    var ends = this.ends_;\n    var linearRings = [];\n    var offset = 0;\n    for (var i = 0, ii = ends.length; i < ii; ++i) {\n      var end = ends[i];\n      var linearRing = new LinearRing(flatCoordinates.slice(offset, end), layout);\n      linearRings.push(linearRing);\n      offset = end;\n    }\n    return linearRings;\n  };\n\n  /**\n   * @return {Array<number>} Oriented flat coordinates.\n   */\n  Polygon.prototype.getOrientedFlatCoordinates = function getOrientedFlatCoordinates () {\n    if (this.orientedRevision_ != this.getRevision()) {\n      var flatCoordinates = this.flatCoordinates;\n      if (linearRingIsOriented(\n        flatCoordinates, 0, this.ends_, this.stride)) {\n        this.orientedFlatCoordinates_ = flatCoordinates;\n      } else {\n        this.orientedFlatCoordinates_ = flatCoordinates.slice();\n        this.orientedFlatCoordinates_.length =\n            orientLinearRings(\n              this.orientedFlatCoordinates_, 0, this.ends_, this.stride);\n      }\n      this.orientedRevision_ = this.getRevision();\n    }\n    return this.orientedFlatCoordinates_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  Polygon.prototype.getSimplifiedGeometryInternal = function getSimplifiedGeometryInternal (squaredTolerance) {\n    var simplifiedFlatCoordinates = [];\n    var simplifiedEnds = [];\n    simplifiedFlatCoordinates.length = quantizeArray(\n      this.flatCoordinates, 0, this.ends_, this.stride,\n      Math.sqrt(squaredTolerance),\n      simplifiedFlatCoordinates, 0, simplifiedEnds);\n    return new Polygon(simplifiedFlatCoordinates, GeometryLayout.XY, simplifiedEnds);\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  Polygon.prototype.getType = function getType () {\n    return GeometryType.POLYGON;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  Polygon.prototype.intersectsExtent = function intersectsExtent (extent) {\n    return intersectsLinearRingArray(\n      this.getOrientedFlatCoordinates(), 0, this.ends_, this.stride, extent);\n  };\n\n  /**\n   * Set the coordinates of the polygon.\n   * @param {!Array<Array<import(\"../coordinate.js\").Coordinate>>} coordinates Coordinates.\n   * @param {GeometryLayout=} opt_layout Layout.\n   * @override\n   * @api\n   */\n  Polygon.prototype.setCoordinates = function setCoordinates (coordinates, opt_layout) {\n    this.setLayout(opt_layout, coordinates, 2);\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = [];\n    }\n    var ends = deflateCoordinatesArray(\n      this.flatCoordinates, 0, coordinates, this.stride, this.ends_);\n    this.flatCoordinates.length = ends.length === 0 ? 0 : ends[ends.length - 1];\n    this.changed();\n  };\n\n  return Polygon;\n}(SimpleGeometry));\n\n\nexport default Polygon;\n\n\n/**\n * Create an approximation of a circle on the surface of a sphere.\n * @param {import(\"../coordinate.js\").Coordinate} center Center (`[lon, lat]` in degrees).\n * @param {number} radius The great-circle distance from the center to\n *     the polygon vertices.\n * @param {number=} opt_n Optional number of vertices for the resulting\n *     polygon. Default is `32`.\n * @param {number=} opt_sphereRadius Optional radius for the sphere (defaults to\n *     the Earth's mean radius using the WGS84 ellipsoid).\n * @return {Polygon} The \"circular\" polygon.\n * @api\n */\nexport function circular(center, radius, opt_n, opt_sphereRadius) {\n  var n = opt_n ? opt_n : 32;\n  /** @type {Array<number>} */\n  var flatCoordinates = [];\n  for (var i = 0; i < n; ++i) {\n    extend(flatCoordinates, sphereOffset(center, radius, 2 * Math.PI * i / n, opt_sphereRadius));\n  }\n  flatCoordinates.push(flatCoordinates[0], flatCoordinates[1]);\n  return new Polygon(flatCoordinates, GeometryLayout.XY, [flatCoordinates.length]);\n}\n\n\n/**\n * Create a polygon from an extent. The layout used is `XY`.\n * @param {import(\"../extent.js\").Extent} extent The extent.\n * @return {Polygon} The polygon.\n * @api\n */\nexport function fromExtent(extent) {\n  var minX = extent[0];\n  var minY = extent[1];\n  var maxX = extent[2];\n  var maxY = extent[3];\n  var flatCoordinates =\n      [minX, minY, minX, maxY, maxX, maxY, maxX, minY, minX, minY];\n  return new Polygon(flatCoordinates, GeometryLayout.XY, [flatCoordinates.length]);\n}\n\n\n/**\n * Create a regular polygon from a circle.\n * @param {import(\"./Circle.js\").default} circle Circle geometry.\n * @param {number=} opt_sides Number of sides of the polygon. Default is 32.\n * @param {number=} opt_angle Start angle for the first vertex of the polygon in\n *     radians. Default is 0.\n * @return {Polygon} Polygon geometry.\n * @api\n */\nexport function fromCircle(circle, opt_sides, opt_angle) {\n  var sides = opt_sides ? opt_sides : 32;\n  var stride = circle.getStride();\n  var layout = circle.getLayout();\n  var center = circle.getCenter();\n  var arrayLength = stride * (sides + 1);\n  var flatCoordinates = new Array(arrayLength);\n  for (var i = 0; i < arrayLength; i += stride) {\n    flatCoordinates[i] = 0;\n    flatCoordinates[i + 1] = 0;\n    for (var j = 2; j < stride; j++) {\n      flatCoordinates[i + j] = center[j];\n    }\n  }\n  var ends = [flatCoordinates.length];\n  var polygon = new Polygon(flatCoordinates, layout, ends);\n  makeRegular(polygon, center, circle.getRadius(), opt_angle);\n  return polygon;\n}\n\n\n/**\n * Modify the coordinates of a polygon to make it a regular polygon.\n * @param {Polygon} polygon Polygon geometry.\n * @param {import(\"../coordinate.js\").Coordinate} center Center of the regular polygon.\n * @param {number} radius Radius of the regular polygon.\n * @param {number=} opt_angle Start angle for the first vertex of the polygon in\n *     radians. Default is 0.\n */\nexport function makeRegular(polygon, center, radius, opt_angle) {\n  var flatCoordinates = polygon.getFlatCoordinates();\n  var stride = polygon.getStride();\n  var sides = flatCoordinates.length / stride - 1;\n  var startAngle = opt_angle ? opt_angle : 0;\n  for (var i = 0; i <= sides; ++i) {\n    var offset = i * stride;\n    var angle = startAngle + (modulo(i, sides) * 2 * Math.PI / sides);\n    flatCoordinates[offset] = center[0] + (radius * Math.cos(angle));\n    flatCoordinates[offset + 1] = center[1] + (radius * Math.sin(angle));\n  }\n  polygon.changed();\n}\n\n//# sourceMappingURL=Polygon.js.map","/**\n * @module ol/View\n */\nimport {DEFAULT_TILE_SIZE} from './tilegrid/common.js';\nimport {getUid} from './util.js';\nimport {VOID} from './functions.js';\nimport {createExtent, none as centerNone} from './centerconstraint.js';\nimport BaseObject from './Object.js';\nimport {createSnapToResolutions, createSnapToPower} from './resolutionconstraint.js';\nimport {createSnapToZero, createSnapToN, none as rotationNone, disable} from './rotationconstraint.js';\nimport ViewHint from './ViewHint.js';\nimport ViewProperty from './ViewProperty.js';\nimport {linearFindNearest} from './array.js';\nimport {assert} from './asserts.js';\nimport {add as addCoordinate, rotate as rotateCoordinate, equals as coordinatesEqual} from './coordinate.js';\nimport {inAndOut} from './easing.js';\nimport {getForViewAndSize, getCenter, getHeight, getWidth, isEmpty} from './extent.js';\nimport GeometryType from './geom/GeometryType.js';\nimport {fromExtent as polygonFromExtent} from './geom/Polygon.js';\nimport {clamp, modulo} from './math.js';\nimport {assign} from './obj.js';\nimport {createProjection, METERS_PER_UNIT} from './proj.js';\nimport Units from './proj/Units.js';\n\n\n/**\n * An animation configuration\n *\n * @typedef {Object} Animation\n * @property {import(\"./coordinate.js\").Coordinate} [sourceCenter]\n * @property {import(\"./coordinate.js\").Coordinate} [targetCenter]\n * @property {number} [sourceResolution]\n * @property {number} [targetResolution]\n * @property {number} [sourceRotation]\n * @property {number} [targetRotation]\n * @property {import(\"./coordinate.js\").Coordinate} [anchor]\n * @property {number} start\n * @property {number} duration\n * @property {boolean} complete\n * @property {function(number):number} easing\n * @property {function(boolean)} callback\n */\n\n\n/**\n * @typedef {Object} Constraints\n * @property {import(\"./centerconstraint.js\").Type} center\n * @property {import(\"./resolutionconstraint.js\").Type} resolution\n * @property {import(\"./rotationconstraint.js\").Type} rotation\n */\n\n\n/**\n * @typedef {Object} FitOptions\n * @property {import(\"./size.js\").Size} [size] The size in pixels of the box to fit\n * the extent into. Default is the current size of the first map in the DOM that\n * uses this view, or `[100, 100]` if no such map is found.\n * @property {!Array<number>} [padding=[0, 0, 0, 0]] Padding (in pixels) to be\n * cleared inside the view. Values in the array are top, right, bottom and left\n * padding.\n * @property {boolean} [constrainResolution=true] Constrain the resolution.\n * @property {boolean} [nearest=false] If `constrainResolution` is `true`, get\n * the nearest extent instead of the closest that actually fits the view.\n * @property {number} [minResolution=0] Minimum resolution that we zoom to.\n * @property {number} [maxZoom] Maximum zoom level that we zoom to. If\n * `minResolution` is given, this property is ignored.\n * @property {number} [duration] The duration of the animation in milliseconds.\n * By default, there is no animation to the target extent.\n * @property {function(number):number} [easing] The easing function used during\n * the animation (defaults to {@link module:ol/easing~inAndOut}).\n * The function will be called for each frame with a number representing a\n * fraction of the animation's duration.  The function should return a number\n * between 0 and 1 representing the progress toward the destination state.\n * @property {function(boolean)} [callback] Function called when the view is in\n * its final position. The callback will be called with `true` if the animation\n * series completed on its own or `false` if it was cancelled.\n */\n\n\n/**\n * @typedef {Object} ViewOptions\n * @property {import(\"./coordinate.js\").Coordinate} [center] The initial center for\n * the view. The coordinate system for the center is specified with the\n * `projection` option. Layer sources will not be fetched if this is not set,\n * but the center can be set later with {@link #setCenter}.\n * @property {boolean|number} [constrainRotation=true] Rotation constraint.\n * `false` means no constraint. `true` means no constraint, but snap to zero\n * near zero. A number constrains the rotation to that number of values. For\n * example, `4` will constrain the rotation to 0, 90, 180, and 270 degrees.\n * @property {boolean} [enableRotation=true] Enable rotation.\n * If `false`, a rotation constraint that always sets the rotation to zero is\n * used. The `constrainRotation` option has no effect if `enableRotation` is\n * `false`.\n * @property {import(\"./extent.js\").Extent} [extent] The extent that constrains the\n * center, in other words, center cannot be set outside this extent.\n * @property {number} [maxResolution] The maximum resolution used to determine\n * the resolution constraint. It is used together with `minResolution` (or\n * `maxZoom`) and `zoomFactor`. If unspecified it is calculated in such a way\n * that the projection's validity extent fits in a 256x256 px tile. If the\n * projection is Spherical Mercator (the default) then `maxResolution` defaults\n * to `40075016.68557849 / 256 = 156543.03392804097`.\n * @property {number} [minResolution] The minimum resolution used to determine\n * the resolution constraint.  It is used together with `maxResolution` (or\n * `minZoom`) and `zoomFactor`.  If unspecified it is calculated assuming 29\n * zoom levels (with a factor of 2). If the projection is Spherical Mercator\n * (the default) then `minResolution` defaults to\n * `40075016.68557849 / 256 / Math.pow(2, 28) = 0.0005831682455839253`.\n * @property {number} [maxZoom=28] The maximum zoom level used to determine the\n * resolution constraint. It is used together with `minZoom` (or\n * `maxResolution`) and `zoomFactor`.  Note that if `minResolution` is also\n * provided, it is given precedence over `maxZoom`.\n * @property {number} [minZoom=0] The minimum zoom level used to determine the\n * resolution constraint. It is used together with `maxZoom` (or\n * `minResolution`) and `zoomFactor`.  Note that if `maxResolution` is also\n * provided, it is given precedence over `minZoom`.\n * @property {import(\"./proj.js\").ProjectionLike} [projection='EPSG:3857'] The\n * projection. The default is Spherical Mercator.\n * @property {number} [resolution] The initial resolution for the view. The\n * units are `projection` units per pixel (e.g. meters per pixel). An\n * alternative to setting this is to set `zoom`. Layer sources will not be\n * fetched if neither this nor `zoom` are defined, but they can be set later\n * with {@link #setZoom} or {@link #setResolution}.\n * @property {Array<number>} [resolutions] Resolutions to determine the\n * resolution constraint. If set the `maxResolution`, `minResolution`,\n * `minZoom`, `maxZoom`, and `zoomFactor` options are ignored.\n * @property {number} [rotation=0] The initial rotation for the view in radians\n * (positive rotation clockwise, 0 means North).\n * @property {number} [zoom] Only used if `resolution` is not defined. Zoom\n * level used to calculate the initial resolution for the view. The initial\n * resolution is determined using the {@link #constrainResolution} method.\n * @property {number} [zoomFactor=2] The zoom factor used to determine the\n * resolution constraint.\n */\n\n\n/**\n * @typedef {Object} AnimationOptions\n * @property {import(\"./coordinate.js\").Coordinate} [center] The center of the view at the end of\n * the animation.\n * @property {number} [zoom] The zoom level of the view at the end of the\n * animation. This takes precedence over `resolution`.\n * @property {number} [resolution] The resolution of the view at the end\n * of the animation.  If `zoom` is also provided, this option will be ignored.\n * @property {number} [rotation] The rotation of the view at the end of\n * the animation.\n * @property {import(\"./coordinate.js\").Coordinate} [anchor] Optional anchor to remained fixed\n * during a rotation or resolution animation.\n * @property {number} [duration=1000] The duration of the animation in milliseconds.\n * @property {function(number):number} [easing] The easing function used\n * during the animation (defaults to {@link module:ol/easing~inAndOut}).\n * The function will be called for each frame with a number representing a\n * fraction of the animation's duration.  The function should return a number\n * between 0 and 1 representing the progress toward the destination state.\n */\n\n\n/**\n * @typedef {Object} State\n * @property {import(\"./coordinate.js\").Coordinate} center\n * @property {import(\"./proj/Projection.js\").default} projection\n * @property {number} resolution\n * @property {number} rotation\n * @property {number} zoom\n */\n\n\n/**\n * Default min zoom level for the map view.\n * @type {number}\n */\nvar DEFAULT_MIN_ZOOM = 0;\n\n\n/**\n * @classdesc\n * A View object represents a simple 2D view of the map.\n *\n * This is the object to act upon to change the center, resolution,\n * and rotation of the map.\n *\n * ### The view states\n *\n * An View is determined by three states: `center`, `resolution`,\n * and `rotation`. Each state has a corresponding getter and setter, e.g.\n * `getCenter` and `setCenter` for the `center` state.\n *\n * An View has a `projection`. The projection determines the\n * coordinate system of the center, and its units determine the units of the\n * resolution (projection units per pixel). The default projection is\n * Spherical Mercator (EPSG:3857).\n *\n * ### The constraints\n *\n * `setCenter`, `setResolution` and `setRotation` can be used to change the\n * states of the view. Any value can be passed to the setters. And the value\n * that is passed to a setter will effectively be the value set in the view,\n * and returned by the corresponding getter.\n *\n * But a View object also has a *resolution constraint*, a\n * *rotation constraint* and a *center constraint*.\n *\n * As said above, no constraints are applied when the setters are used to set\n * new states for the view. Applying constraints is done explicitly through\n * the use of the `constrain*` functions (`constrainResolution` and\n * `constrainRotation` and `constrainCenter`).\n *\n * The main users of the constraints are the interactions and the\n * controls. For example, double-clicking on the map changes the view to\n * the \"next\" resolution. And releasing the fingers after pinch-zooming\n * snaps to the closest resolution (with an animation).\n *\n * The *resolution constraint* snaps to specific resolutions. It is\n * determined by the following options: `resolutions`, `maxResolution`,\n * `maxZoom`, and `zoomFactor`. If `resolutions` is set, the other three\n * options are ignored. See documentation for each option for more\n * information.\n *\n * The *rotation constraint* snaps to specific angles. It is determined\n * by the following options: `enableRotation` and `constrainRotation`.\n * By default the rotation value is snapped to zero when approaching the\n * horizontal.\n *\n * The *center constraint* is determined by the `extent` option. By\n * default the center is not constrained at all.\n *\n  * @api\n */\nvar View = /*@__PURE__*/(function (BaseObject) {\n  function View(opt_options) {\n    BaseObject.call(this);\n\n    var options = assign({}, opt_options);\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.hints_ = [0, 0];\n\n    /**\n     * @private\n     * @type {Array<Array<Animation>>}\n     */\n    this.animations_ = [];\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.updateAnimationKey_;\n\n    this.updateAnimations_ = this.updateAnimations_.bind(this);\n\n    /**\n     * @private\n     * @const\n     * @type {import(\"./proj/Projection.js\").default}\n     */\n    this.projection_ = createProjection(options.projection, 'EPSG:3857');\n\n    this.applyOptions_(options);\n  }\n\n  if ( BaseObject ) View.__proto__ = BaseObject;\n  View.prototype = Object.create( BaseObject && BaseObject.prototype );\n  View.prototype.constructor = View;\n\n  /**\n   * Set up the view with the given options.\n   * @param {ViewOptions} options View options.\n   */\n  View.prototype.applyOptions_ = function applyOptions_ (options) {\n\n    /**\n     * @type {Object<string, *>}\n     */\n    var properties = {};\n    properties[ViewProperty.CENTER] = options.center !== undefined ?\n      options.center : null;\n\n    var resolutionConstraintInfo = createResolutionConstraint(options);\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxResolution_ = resolutionConstraintInfo.maxResolution;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.minResolution_ = resolutionConstraintInfo.minResolution;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.zoomFactor_ = resolutionConstraintInfo.zoomFactor;\n\n    /**\n     * @private\n     * @type {Array<number>|undefined}\n     */\n    this.resolutions_ = options.resolutions;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.minZoom_ = resolutionConstraintInfo.minZoom;\n\n    var centerConstraint = createCenterConstraint(options);\n    var resolutionConstraint = resolutionConstraintInfo.constraint;\n    var rotationConstraint = createRotationConstraint(options);\n\n    /**\n     * @private\n     * @type {Constraints}\n     */\n    this.constraints_ = {\n      center: centerConstraint,\n      resolution: resolutionConstraint,\n      rotation: rotationConstraint\n    };\n\n    if (options.resolution !== undefined) {\n      properties[ViewProperty.RESOLUTION] = options.resolution;\n    } else if (options.zoom !== undefined) {\n      properties[ViewProperty.RESOLUTION] = this.constrainResolution(\n        this.maxResolution_, options.zoom - this.minZoom_);\n\n      if (this.resolutions_) { // in case map zoom is out of min/max zoom range\n        properties[ViewProperty.RESOLUTION] = clamp(\n          Number(this.getResolution() || properties[ViewProperty.RESOLUTION]),\n          this.minResolution_, this.maxResolution_);\n      }\n    }\n    properties[ViewProperty.ROTATION] = options.rotation !== undefined ? options.rotation : 0;\n    this.setProperties(properties);\n\n    /**\n     * @private\n     * @type {ViewOptions}\n     */\n    this.options_ = options;\n\n  };\n\n  /**\n   * Get an updated version of the view options used to construct the view.  The\n   * current resolution (or zoom), center, and rotation are applied to any stored\n   * options.  The provided options can be used to apply new min/max zoom or\n   * resolution limits.\n   * @param {ViewOptions} newOptions New options to be applied.\n   * @return {ViewOptions} New options updated with the current view state.\n   */\n  View.prototype.getUpdatedOptions_ = function getUpdatedOptions_ (newOptions) {\n    var options = assign({}, this.options_);\n\n    // preserve resolution (or zoom)\n    if (options.resolution !== undefined) {\n      options.resolution = this.getResolution();\n    } else {\n      options.zoom = this.getZoom();\n    }\n\n    // preserve center\n    options.center = this.getCenter();\n\n    // preserve rotation\n    options.rotation = this.getRotation();\n\n    return assign({}, options, newOptions);\n  };\n\n  /**\n   * Animate the view.  The view's center, zoom (or resolution), and rotation\n   * can be animated for smooth transitions between view states.  For example,\n   * to animate the view to a new zoom level:\n   *\n   *     view.animate({zoom: view.getZoom() + 1});\n   *\n   * By default, the animation lasts one second and uses in-and-out easing.  You\n   * can customize this behavior by including `duration` (in milliseconds) and\n   * `easing` options (see {@link module:ol/easing}).\n   *\n   * To chain together multiple animations, call the method with multiple\n   * animation objects.  For example, to first zoom and then pan:\n   *\n   *     view.animate({zoom: 10}, {center: [0, 0]});\n   *\n   * If you provide a function as the last argument to the animate method, it\n   * will get called at the end of an animation series.  The callback will be\n   * called with `true` if the animation series completed on its own or `false`\n   * if it was cancelled.\n   *\n   * Animations are cancelled by user interactions (e.g. dragging the map) or by\n   * calling `view.setCenter()`, `view.setResolution()`, or `view.setRotation()`\n   * (or another method that calls one of these).\n   *\n   * @param {...(AnimationOptions|function(boolean))} var_args Animation\n   *     options.  Multiple animations can be run in series by passing multiple\n   *     options objects.  To run multiple animations in parallel, call the method\n   *     multiple times.  An optional callback can be provided as a final\n   *     argument.  The callback will be called with a boolean indicating whether\n   *     the animation completed without being cancelled.\n   * @api\n   */\n  View.prototype.animate = function animate (var_args) {\n    var arguments$1 = arguments;\n\n    var animationCount = arguments.length;\n    var callback;\n    if (animationCount > 1 && typeof arguments[animationCount - 1] === 'function') {\n      callback = arguments[animationCount - 1];\n      --animationCount;\n    }\n    if (!this.isDef()) {\n      // if view properties are not yet set, shortcut to the final state\n      var state = arguments[animationCount - 1];\n      if (state.center) {\n        this.setCenter(state.center);\n      }\n      if (state.zoom !== undefined) {\n        this.setZoom(state.zoom);\n      }\n      if (state.rotation !== undefined) {\n        this.setRotation(state.rotation);\n      }\n      if (callback) {\n        animationCallback(callback, true);\n      }\n      return;\n    }\n    var start = Date.now();\n    var center = this.getCenter().slice();\n    var resolution = this.getResolution();\n    var rotation = this.getRotation();\n    var series = [];\n    for (var i = 0; i < animationCount; ++i) {\n      var options = /** @type {AnimationOptions} */ (arguments$1[i]);\n\n      var animation = /** @type {Animation} */ ({\n        start: start,\n        complete: false,\n        anchor: options.anchor,\n        duration: options.duration !== undefined ? options.duration : 1000,\n        easing: options.easing || inAndOut\n      });\n\n      if (options.center) {\n        animation.sourceCenter = center;\n        animation.targetCenter = options.center;\n        center = animation.targetCenter;\n      }\n\n      if (options.zoom !== undefined) {\n        animation.sourceResolution = resolution;\n        animation.targetResolution = this.constrainResolution(\n          this.maxResolution_, options.zoom - this.minZoom_, 0);\n        resolution = animation.targetResolution;\n      } else if (options.resolution) {\n        animation.sourceResolution = resolution;\n        animation.targetResolution = options.resolution;\n        resolution = animation.targetResolution;\n      }\n\n      if (options.rotation !== undefined) {\n        animation.sourceRotation = rotation;\n        var delta = modulo(options.rotation - rotation + Math.PI, 2 * Math.PI) - Math.PI;\n        animation.targetRotation = rotation + delta;\n        rotation = animation.targetRotation;\n      }\n\n      animation.callback = callback;\n\n      // check if animation is a no-op\n      if (isNoopAnimation(animation)) {\n        animation.complete = true;\n        // we still push it onto the series for callback handling\n      } else {\n        start += animation.duration;\n      }\n      series.push(animation);\n    }\n    this.animations_.push(series);\n    this.setHint(ViewHint.ANIMATING, 1);\n    this.updateAnimations_();\n  };\n\n  /**\n   * Determine if the view is being animated.\n   * @return {boolean} The view is being animated.\n   * @api\n   */\n  View.prototype.getAnimating = function getAnimating () {\n    return this.hints_[ViewHint.ANIMATING] > 0;\n  };\n\n  /**\n   * Determine if the user is interacting with the view, such as panning or zooming.\n   * @return {boolean} The view is being interacted with.\n   * @api\n   */\n  View.prototype.getInteracting = function getInteracting () {\n    return this.hints_[ViewHint.INTERACTING] > 0;\n  };\n\n  /**\n   * Cancel any ongoing animations.\n   * @api\n   */\n  View.prototype.cancelAnimations = function cancelAnimations () {\n    this.setHint(ViewHint.ANIMATING, -this.hints_[ViewHint.ANIMATING]);\n    for (var i = 0, ii = this.animations_.length; i < ii; ++i) {\n      var series = this.animations_[i];\n      if (series[0].callback) {\n        animationCallback(series[0].callback, false);\n      }\n    }\n    this.animations_.length = 0;\n  };\n\n  /**\n   * Update all animations.\n   */\n  View.prototype.updateAnimations_ = function updateAnimations_ () {\n    if (this.updateAnimationKey_ !== undefined) {\n      cancelAnimationFrame(this.updateAnimationKey_);\n      this.updateAnimationKey_ = undefined;\n    }\n    if (!this.getAnimating()) {\n      return;\n    }\n    var now = Date.now();\n    var more = false;\n    for (var i = this.animations_.length - 1; i >= 0; --i) {\n      var series = this.animations_[i];\n      var seriesComplete = true;\n      for (var j = 0, jj = series.length; j < jj; ++j) {\n        var animation = series[j];\n        if (animation.complete) {\n          continue;\n        }\n        var elapsed = now - animation.start;\n        var fraction = animation.duration > 0 ? elapsed / animation.duration : 1;\n        if (fraction >= 1) {\n          animation.complete = true;\n          fraction = 1;\n        } else {\n          seriesComplete = false;\n        }\n        var progress = animation.easing(fraction);\n        if (animation.sourceCenter) {\n          var x0 = animation.sourceCenter[0];\n          var y0 = animation.sourceCenter[1];\n          var x1 = animation.targetCenter[0];\n          var y1 = animation.targetCenter[1];\n          var x = x0 + progress * (x1 - x0);\n          var y = y0 + progress * (y1 - y0);\n          this.set(ViewProperty.CENTER, [x, y]);\n        }\n        if (animation.sourceResolution && animation.targetResolution) {\n          var resolution = progress === 1 ?\n            animation.targetResolution :\n            animation.sourceResolution + progress * (animation.targetResolution - animation.sourceResolution);\n          if (animation.anchor) {\n            this.set(ViewProperty.CENTER,\n              this.calculateCenterZoom(resolution, animation.anchor));\n          }\n          this.set(ViewProperty.RESOLUTION, resolution);\n        }\n        if (animation.sourceRotation !== undefined && animation.targetRotation !== undefined) {\n          var rotation = progress === 1 ?\n            modulo(animation.targetRotation + Math.PI, 2 * Math.PI) - Math.PI :\n            animation.sourceRotation + progress * (animation.targetRotation - animation.sourceRotation);\n          if (animation.anchor) {\n            this.set(ViewProperty.CENTER,\n              this.calculateCenterRotate(rotation, animation.anchor));\n          }\n          this.set(ViewProperty.ROTATION, rotation);\n        }\n        more = true;\n        if (!animation.complete) {\n          break;\n        }\n      }\n      if (seriesComplete) {\n        this.animations_[i] = null;\n        this.setHint(ViewHint.ANIMATING, -1);\n        var callback = series[0].callback;\n        if (callback) {\n          animationCallback(callback, true);\n        }\n      }\n    }\n    // prune completed series\n    this.animations_ = this.animations_.filter(Boolean);\n    if (more && this.updateAnimationKey_ === undefined) {\n      this.updateAnimationKey_ = requestAnimationFrame(this.updateAnimations_);\n    }\n  };\n\n  /**\n   * @param {number} rotation Target rotation.\n   * @param {import(\"./coordinate.js\").Coordinate} anchor Rotation anchor.\n   * @return {import(\"./coordinate.js\").Coordinate|undefined} Center for rotation and anchor.\n   */\n  View.prototype.calculateCenterRotate = function calculateCenterRotate (rotation, anchor) {\n    var center;\n    var currentCenter = this.getCenter();\n    if (currentCenter !== undefined) {\n      center = [currentCenter[0] - anchor[0], currentCenter[1] - anchor[1]];\n      rotateCoordinate(center, rotation - this.getRotation());\n      addCoordinate(center, anchor);\n    }\n    return center;\n  };\n\n  /**\n   * @param {number} resolution Target resolution.\n   * @param {import(\"./coordinate.js\").Coordinate} anchor Zoom anchor.\n   * @return {import(\"./coordinate.js\").Coordinate|undefined} Center for resolution and anchor.\n   */\n  View.prototype.calculateCenterZoom = function calculateCenterZoom (resolution, anchor) {\n    var center;\n    var currentCenter = this.getCenter();\n    var currentResolution = this.getResolution();\n    if (currentCenter !== undefined && currentResolution !== undefined) {\n      var x = anchor[0] - resolution * (anchor[0] - currentCenter[0]) / currentResolution;\n      var y = anchor[1] - resolution * (anchor[1] - currentCenter[1]) / currentResolution;\n      center = [x, y];\n    }\n    return center;\n  };\n\n  /**\n   * @private\n   * @return {import(\"./size.js\").Size} Viewport size or `[100, 100]` when no viewport is found.\n   */\n  View.prototype.getSizeFromViewport_ = function getSizeFromViewport_ () {\n    var size = [100, 100];\n    var selector = '.ol-viewport[data-view=\"' + getUid(this) + '\"]';\n    var element = document.querySelector(selector);\n    if (element) {\n      var metrics = getComputedStyle(element);\n      size[0] = parseInt(metrics.width, 10);\n      size[1] = parseInt(metrics.height, 10);\n    }\n    return size;\n  };\n\n  /**\n   * Get the constrained center of this view.\n   * @param {import(\"./coordinate.js\").Coordinate|undefined} center Center.\n   * @return {import(\"./coordinate.js\").Coordinate|undefined} Constrained center.\n   * @api\n   */\n  View.prototype.constrainCenter = function constrainCenter (center) {\n    return this.constraints_.center(center);\n  };\n\n  /**\n   * Get the constrained resolution of this view.\n   * @param {number|undefined} resolution Resolution.\n   * @param {number=} opt_delta Delta. Default is `0`.\n   * @param {number=} opt_direction Direction. Default is `0`.\n   * @return {number|undefined} Constrained resolution.\n   * @api\n   */\n  View.prototype.constrainResolution = function constrainResolution (resolution, opt_delta, opt_direction) {\n    var delta = opt_delta || 0;\n    var direction = opt_direction || 0;\n    return this.constraints_.resolution(resolution, delta, direction);\n  };\n\n  /**\n   * Get the constrained rotation of this view.\n   * @param {number|undefined} rotation Rotation.\n   * @param {number=} opt_delta Delta. Default is `0`.\n   * @return {number|undefined} Constrained rotation.\n   * @api\n   */\n  View.prototype.constrainRotation = function constrainRotation (rotation, opt_delta) {\n    var delta = opt_delta || 0;\n    return this.constraints_.rotation(rotation, delta);\n  };\n\n  /**\n   * Get the view center.\n   * @return {import(\"./coordinate.js\").Coordinate|undefined} The center of the view.\n   * @observable\n   * @api\n   */\n  View.prototype.getCenter = function getCenter () {\n    return (\n      /** @type {import(\"./coordinate.js\").Coordinate|undefined} */ (this.get(ViewProperty.CENTER))\n    );\n  };\n\n  /**\n   * @return {Constraints} Constraints.\n   */\n  View.prototype.getConstraints = function getConstraints () {\n    return this.constraints_;\n  };\n\n  /**\n   * @param {Array<number>=} opt_hints Destination array.\n   * @return {Array<number>} Hint.\n   */\n  View.prototype.getHints = function getHints (opt_hints) {\n    if (opt_hints !== undefined) {\n      opt_hints[0] = this.hints_[0];\n      opt_hints[1] = this.hints_[1];\n      return opt_hints;\n    } else {\n      return this.hints_.slice();\n    }\n  };\n\n  /**\n   * Calculate the extent for the current view state and the passed size.\n   * The size is the pixel dimensions of the box into which the calculated extent\n   * should fit. In most cases you want to get the extent of the entire map,\n   * that is `map.getSize()`.\n   * @param {import(\"./size.js\").Size=} opt_size Box pixel size. If not provided, the size of the\n   * first map that uses this view will be used.\n   * @return {import(\"./extent.js\").Extent} Extent.\n   * @api\n   */\n  View.prototype.calculateExtent = function calculateExtent (opt_size) {\n    var size = opt_size || this.getSizeFromViewport_();\n    var center = /** @type {!import(\"./coordinate.js\").Coordinate} */ (this.getCenter());\n    assert(center, 1); // The view center is not defined\n    var resolution = /** @type {!number} */ (this.getResolution());\n    assert(resolution !== undefined, 2); // The view resolution is not defined\n    var rotation = /** @type {!number} */ (this.getRotation());\n    assert(rotation !== undefined, 3); // The view rotation is not defined\n\n    return getForViewAndSize(center, resolution, rotation, size);\n  };\n\n  /**\n   * Get the maximum resolution of the view.\n   * @return {number} The maximum resolution of the view.\n   * @api\n   */\n  View.prototype.getMaxResolution = function getMaxResolution () {\n    return this.maxResolution_;\n  };\n\n  /**\n   * Get the minimum resolution of the view.\n   * @return {number} The minimum resolution of the view.\n   * @api\n   */\n  View.prototype.getMinResolution = function getMinResolution () {\n    return this.minResolution_;\n  };\n\n  /**\n   * Get the maximum zoom level for the view.\n   * @return {number} The maximum zoom level.\n   * @api\n   */\n  View.prototype.getMaxZoom = function getMaxZoom () {\n    return /** @type {number} */ (this.getZoomForResolution(this.minResolution_));\n  };\n\n  /**\n   * Set a new maximum zoom level for the view.\n   * @param {number} zoom The maximum zoom level.\n   * @api\n   */\n  View.prototype.setMaxZoom = function setMaxZoom (zoom) {\n    this.applyOptions_(this.getUpdatedOptions_({maxZoom: zoom}));\n  };\n\n  /**\n   * Get the minimum zoom level for the view.\n   * @return {number} The minimum zoom level.\n   * @api\n   */\n  View.prototype.getMinZoom = function getMinZoom () {\n    return /** @type {number} */ (this.getZoomForResolution(this.maxResolution_));\n  };\n\n  /**\n   * Set a new minimum zoom level for the view.\n   * @param {number} zoom The minimum zoom level.\n   * @api\n   */\n  View.prototype.setMinZoom = function setMinZoom (zoom) {\n    this.applyOptions_(this.getUpdatedOptions_({minZoom: zoom}));\n  };\n\n  /**\n   * Get the view projection.\n   * @return {import(\"./proj/Projection.js\").default} The projection of the view.\n   * @api\n   */\n  View.prototype.getProjection = function getProjection () {\n    return this.projection_;\n  };\n\n  /**\n   * Get the view resolution.\n   * @return {number|undefined} The resolution of the view.\n   * @observable\n   * @api\n   */\n  View.prototype.getResolution = function getResolution () {\n    return /** @type {number|undefined} */ (this.get(ViewProperty.RESOLUTION));\n  };\n\n  /**\n   * Get the resolutions for the view. This returns the array of resolutions\n   * passed to the constructor of the View, or undefined if none were given.\n   * @return {Array<number>|undefined} The resolutions of the view.\n   * @api\n   */\n  View.prototype.getResolutions = function getResolutions () {\n    return this.resolutions_;\n  };\n\n  /**\n   * Get the resolution for a provided extent (in map units) and size (in pixels).\n   * @param {import(\"./extent.js\").Extent} extent Extent.\n   * @param {import(\"./size.js\").Size=} opt_size Box pixel size.\n   * @return {number} The resolution at which the provided extent will render at\n   *     the given size.\n   * @api\n   */\n  View.prototype.getResolutionForExtent = function getResolutionForExtent (extent, opt_size) {\n    var size = opt_size || this.getSizeFromViewport_();\n    var xResolution = getWidth(extent) / size[0];\n    var yResolution = getHeight(extent) / size[1];\n    return Math.max(xResolution, yResolution);\n  };\n\n  /**\n   * Return a function that returns a value between 0 and 1 for a\n   * resolution. Exponential scaling is assumed.\n   * @param {number=} opt_power Power.\n   * @return {function(number): number} Resolution for value function.\n   */\n  View.prototype.getResolutionForValueFunction = function getResolutionForValueFunction (opt_power) {\n    var power = opt_power || 2;\n    var maxResolution = this.maxResolution_;\n    var minResolution = this.minResolution_;\n    var max = Math.log(maxResolution / minResolution) / Math.log(power);\n    return (\n      /**\n       * @param {number} value Value.\n       * @return {number} Resolution.\n       */\n      function(value) {\n        var resolution = maxResolution / Math.pow(power, value * max);\n        return resolution;\n      });\n  };\n\n  /**\n   * Get the view rotation.\n   * @return {number} The rotation of the view in radians.\n   * @observable\n   * @api\n   */\n  View.prototype.getRotation = function getRotation () {\n    return /** @type {number} */ (this.get(ViewProperty.ROTATION));\n  };\n\n  /**\n   * Return a function that returns a resolution for a value between\n   * 0 and 1. Exponential scaling is assumed.\n   * @param {number=} opt_power Power.\n   * @return {function(number): number} Value for resolution function.\n   */\n  View.prototype.getValueForResolutionFunction = function getValueForResolutionFunction (opt_power) {\n    var power = opt_power || 2;\n    var maxResolution = this.maxResolution_;\n    var minResolution = this.minResolution_;\n    var max = Math.log(maxResolution / minResolution) / Math.log(power);\n    return (\n      /**\n       * @param {number} resolution Resolution.\n       * @return {number} Value.\n       */\n      function(resolution) {\n        var value = (Math.log(maxResolution / resolution) / Math.log(power)) / max;\n        return value;\n      });\n  };\n\n  /**\n   * @param {number} pixelRatio Pixel ratio for center rounding.\n   * @return {State} View state.\n   */\n  View.prototype.getState = function getState (pixelRatio) {\n    var center = /** @type {import(\"./coordinate.js\").Coordinate} */ (this.getCenter());\n    var projection = this.getProjection();\n    var resolution = /** @type {number} */ (this.getResolution());\n    var pixelResolution = resolution / pixelRatio;\n    var rotation = this.getRotation();\n    return (\n      /** @type {State} */ ({\n        center: [\n          Math.round(center[0] / pixelResolution) * pixelResolution,\n          Math.round(center[1] / pixelResolution) * pixelResolution\n        ],\n        projection: projection !== undefined ? projection : null,\n        resolution: resolution,\n        rotation: rotation,\n        zoom: this.getZoom()\n      })\n    );\n  };\n\n  /**\n   * Get the current zoom level.  If you configured your view with a resolutions\n   * array (this is rare), this method may return non-integer zoom levels (so\n   * the zoom level is not safe to use as an index into a resolutions array).\n   * @return {number|undefined} Zoom.\n   * @api\n   */\n  View.prototype.getZoom = function getZoom () {\n    var zoom;\n    var resolution = this.getResolution();\n    if (resolution !== undefined) {\n      zoom = this.getZoomForResolution(resolution);\n    }\n    return zoom;\n  };\n\n  /**\n   * Get the zoom level for a resolution.\n   * @param {number} resolution The resolution.\n   * @return {number|undefined} The zoom level for the provided resolution.\n   * @api\n   */\n  View.prototype.getZoomForResolution = function getZoomForResolution (resolution) {\n    var offset = this.minZoom_ || 0;\n    var max, zoomFactor;\n    if (this.resolutions_) {\n      var nearest = linearFindNearest(this.resolutions_, resolution, 1);\n      offset = nearest;\n      max = this.resolutions_[nearest];\n      if (nearest == this.resolutions_.length - 1) {\n        zoomFactor = 2;\n      } else {\n        zoomFactor = max / this.resolutions_[nearest + 1];\n      }\n    } else {\n      max = this.maxResolution_;\n      zoomFactor = this.zoomFactor_;\n    }\n    return offset + Math.log(max / resolution) / Math.log(zoomFactor);\n  };\n\n  /**\n   * Get the resolution for a zoom level.\n   * @param {number} zoom Zoom level.\n   * @return {number} The view resolution for the provided zoom level.\n   * @api\n   */\n  View.prototype.getResolutionForZoom = function getResolutionForZoom (zoom) {\n    return /** @type {number} */ (this.constrainResolution(\n      this.maxResolution_, zoom - this.minZoom_, 0));\n  };\n\n  /**\n   * Fit the given geometry or extent based on the given map size and border.\n   * The size is pixel dimensions of the box to fit the extent into.\n   * In most cases you will want to use the map size, that is `map.getSize()`.\n   * Takes care of the map angle.\n   * @param {import(\"./geom/SimpleGeometry.js\").default|import(\"./extent.js\").Extent} geometryOrExtent The geometry or\n   *     extent to fit the view to.\n   * @param {FitOptions=} opt_options Options.\n   * @api\n   */\n  View.prototype.fit = function fit (geometryOrExtent, opt_options) {\n    var options = opt_options || {};\n    var size = options.size;\n    if (!size) {\n      size = this.getSizeFromViewport_();\n    }\n    /** @type {import(\"./geom/SimpleGeometry.js\").default} */\n    var geometry;\n    assert(Array.isArray(geometryOrExtent) || typeof /** @type {?} */ (geometryOrExtent).getSimplifiedGeometry === 'function',\n      24); // Invalid extent or geometry provided as `geometry`\n    if (Array.isArray(geometryOrExtent)) {\n      assert(!isEmpty(geometryOrExtent),\n        25); // Cannot fit empty extent provided as `geometry`\n      geometry = polygonFromExtent(geometryOrExtent);\n    } else if (geometryOrExtent.getType() === GeometryType.CIRCLE) {\n      geometryOrExtent = geometryOrExtent.getExtent();\n      geometry = polygonFromExtent(geometryOrExtent);\n      geometry.rotate(this.getRotation(), getCenter(geometryOrExtent));\n    } else {\n      geometry = geometryOrExtent;\n    }\n\n    var padding = options.padding !== undefined ? options.padding : [0, 0, 0, 0];\n    var constrainResolution = options.constrainResolution !== undefined ?\n      options.constrainResolution : true;\n    var nearest = options.nearest !== undefined ? options.nearest : false;\n    var minResolution;\n    if (options.minResolution !== undefined) {\n      minResolution = options.minResolution;\n    } else if (options.maxZoom !== undefined) {\n      minResolution = this.constrainResolution(\n        this.maxResolution_, options.maxZoom - this.minZoom_, 0);\n    } else {\n      minResolution = 0;\n    }\n    var coords = geometry.getFlatCoordinates();\n\n    // calculate rotated extent\n    var rotation = this.getRotation();\n    var cosAngle = Math.cos(-rotation);\n    var sinAngle = Math.sin(-rotation);\n    var minRotX = +Infinity;\n    var minRotY = +Infinity;\n    var maxRotX = -Infinity;\n    var maxRotY = -Infinity;\n    var stride = geometry.getStride();\n    for (var i = 0, ii = coords.length; i < ii; i += stride) {\n      var rotX = coords[i] * cosAngle - coords[i + 1] * sinAngle;\n      var rotY = coords[i] * sinAngle + coords[i + 1] * cosAngle;\n      minRotX = Math.min(minRotX, rotX);\n      minRotY = Math.min(minRotY, rotY);\n      maxRotX = Math.max(maxRotX, rotX);\n      maxRotY = Math.max(maxRotY, rotY);\n    }\n\n    // calculate resolution\n    var resolution = this.getResolutionForExtent(\n      [minRotX, minRotY, maxRotX, maxRotY],\n      [size[0] - padding[1] - padding[3], size[1] - padding[0] - padding[2]]);\n    resolution = isNaN(resolution) ? minResolution :\n      Math.max(resolution, minResolution);\n    if (constrainResolution) {\n      var constrainedResolution = this.constrainResolution(resolution, 0, 0);\n      if (!nearest && constrainedResolution < resolution) {\n        constrainedResolution = this.constrainResolution(\n          constrainedResolution, -1, 0);\n      }\n      resolution = constrainedResolution;\n    }\n\n    // calculate center\n    sinAngle = -sinAngle; // go back to original rotation\n    var centerRotX = (minRotX + maxRotX) / 2;\n    var centerRotY = (minRotY + maxRotY) / 2;\n    centerRotX += (padding[1] - padding[3]) / 2 * resolution;\n    centerRotY += (padding[0] - padding[2]) / 2 * resolution;\n    var centerX = centerRotX * cosAngle - centerRotY * sinAngle;\n    var centerY = centerRotY * cosAngle + centerRotX * sinAngle;\n    var center = [centerX, centerY];\n    var callback = options.callback ? options.callback : VOID;\n\n    if (options.duration !== undefined) {\n      this.animate({\n        resolution: resolution,\n        center: center,\n        duration: options.duration,\n        easing: options.easing\n      }, callback);\n    } else {\n      this.setResolution(resolution);\n      this.setCenter(center);\n      animationCallback(callback, true);\n    }\n  };\n\n  /**\n   * Center on coordinate and view position.\n   * @param {import(\"./coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"./size.js\").Size} size Box pixel size.\n   * @param {import(\"./pixel.js\").Pixel} position Position on the view to center on.\n   * @api\n   */\n  View.prototype.centerOn = function centerOn (coordinate, size, position) {\n    // calculate rotated position\n    var rotation = this.getRotation();\n    var cosAngle = Math.cos(-rotation);\n    var sinAngle = Math.sin(-rotation);\n    var rotX = coordinate[0] * cosAngle - coordinate[1] * sinAngle;\n    var rotY = coordinate[1] * cosAngle + coordinate[0] * sinAngle;\n    var resolution = this.getResolution();\n    rotX += (size[0] / 2 - position[0]) * resolution;\n    rotY += (position[1] - size[1] / 2) * resolution;\n\n    // go back to original angle\n    sinAngle = -sinAngle; // go back to original rotation\n    var centerX = rotX * cosAngle - rotY * sinAngle;\n    var centerY = rotY * cosAngle + rotX * sinAngle;\n\n    this.setCenter([centerX, centerY]);\n  };\n\n  /**\n   * @return {boolean} Is defined.\n   */\n  View.prototype.isDef = function isDef () {\n    return !!this.getCenter() && this.getResolution() !== undefined;\n  };\n\n  /**\n   * Rotate the view around a given coordinate.\n   * @param {number} rotation New rotation value for the view.\n   * @param {import(\"./coordinate.js\").Coordinate=} opt_anchor The rotation center.\n   * @api\n   */\n  View.prototype.rotate = function rotate (rotation, opt_anchor) {\n    if (opt_anchor !== undefined) {\n      var center = this.calculateCenterRotate(rotation, opt_anchor);\n      this.setCenter(center);\n    }\n    this.setRotation(rotation);\n  };\n\n  /**\n   * Set the center of the current view.\n   * @param {import(\"./coordinate.js\").Coordinate|undefined} center The center of the view.\n   * @observable\n   * @api\n   */\n  View.prototype.setCenter = function setCenter (center) {\n    this.set(ViewProperty.CENTER, center);\n    if (this.getAnimating()) {\n      this.cancelAnimations();\n    }\n  };\n\n  /**\n   * @param {ViewHint} hint Hint.\n   * @param {number} delta Delta.\n   * @return {number} New value.\n   */\n  View.prototype.setHint = function setHint (hint, delta) {\n    this.hints_[hint] += delta;\n    this.changed();\n    return this.hints_[hint];\n  };\n\n  /**\n   * Set the resolution for this view.\n   * @param {number|undefined} resolution The resolution of the view.\n   * @observable\n   * @api\n   */\n  View.prototype.setResolution = function setResolution (resolution) {\n    this.set(ViewProperty.RESOLUTION, resolution);\n    if (this.getAnimating()) {\n      this.cancelAnimations();\n    }\n  };\n\n  /**\n   * Set the rotation for this view.\n   * @param {number} rotation The rotation of the view in radians.\n   * @observable\n   * @api\n   */\n  View.prototype.setRotation = function setRotation (rotation) {\n    this.set(ViewProperty.ROTATION, rotation);\n    if (this.getAnimating()) {\n      this.cancelAnimations();\n    }\n  };\n\n  /**\n   * Zoom to a specific zoom level.\n   * @param {number} zoom Zoom level.\n   * @api\n   */\n  View.prototype.setZoom = function setZoom (zoom) {\n    this.setResolution(this.getResolutionForZoom(zoom));\n  };\n\n  return View;\n}(BaseObject));\n\n\n/**\n * @param {Function} callback Callback.\n * @param {*} returnValue Return value.\n */\nfunction animationCallback(callback, returnValue) {\n  setTimeout(function() {\n    callback(returnValue);\n  }, 0);\n}\n\n\n/**\n * @param {ViewOptions} options View options.\n * @return {import(\"./centerconstraint.js\").Type} The constraint.\n */\nexport function createCenterConstraint(options) {\n  if (options.extent !== undefined) {\n    return createExtent(options.extent);\n  } else {\n    return centerNone;\n  }\n}\n\n\n/**\n * @param {ViewOptions} options View options.\n * @return {{constraint: import(\"./resolutionconstraint.js\").Type, maxResolution: number,\n *     minResolution: number, minZoom: number, zoomFactor: number}} The constraint.\n */\nexport function createResolutionConstraint(options) {\n  var resolutionConstraint;\n  var maxResolution;\n  var minResolution;\n\n  // TODO: move these to be ol constants\n  // see https://github.com/openlayers/openlayers/issues/2076\n  var defaultMaxZoom = 28;\n  var defaultZoomFactor = 2;\n\n  var minZoom = options.minZoom !== undefined ?\n    options.minZoom : DEFAULT_MIN_ZOOM;\n\n  var maxZoom = options.maxZoom !== undefined ?\n    options.maxZoom : defaultMaxZoom;\n\n  var zoomFactor = options.zoomFactor !== undefined ?\n    options.zoomFactor : defaultZoomFactor;\n\n  if (options.resolutions !== undefined) {\n    var resolutions = options.resolutions;\n    maxResolution = resolutions[minZoom];\n    minResolution = resolutions[maxZoom] !== undefined ?\n      resolutions[maxZoom] : resolutions[resolutions.length - 1];\n    resolutionConstraint = createSnapToResolutions(\n      resolutions);\n  } else {\n    // calculate the default min and max resolution\n    var projection = createProjection(options.projection, 'EPSG:3857');\n    var extent = projection.getExtent();\n    var size = !extent ?\n      // use an extent that can fit the whole world if need be\n      360 * METERS_PER_UNIT[Units.DEGREES] /\n            projection.getMetersPerUnit() :\n      Math.max(getWidth(extent), getHeight(extent));\n\n    var defaultMaxResolution = size / DEFAULT_TILE_SIZE / Math.pow(\n      defaultZoomFactor, DEFAULT_MIN_ZOOM);\n\n    var defaultMinResolution = defaultMaxResolution / Math.pow(\n      defaultZoomFactor, defaultMaxZoom - DEFAULT_MIN_ZOOM);\n\n    // user provided maxResolution takes precedence\n    maxResolution = options.maxResolution;\n    if (maxResolution !== undefined) {\n      minZoom = 0;\n    } else {\n      maxResolution = defaultMaxResolution / Math.pow(zoomFactor, minZoom);\n    }\n\n    // user provided minResolution takes precedence\n    minResolution = options.minResolution;\n    if (minResolution === undefined) {\n      if (options.maxZoom !== undefined) {\n        if (options.maxResolution !== undefined) {\n          minResolution = maxResolution / Math.pow(zoomFactor, maxZoom);\n        } else {\n          minResolution = defaultMaxResolution / Math.pow(zoomFactor, maxZoom);\n        }\n      } else {\n        minResolution = defaultMinResolution;\n      }\n    }\n\n    // given discrete zoom levels, minResolution may be different than provided\n    maxZoom = minZoom + Math.floor(\n      Math.log(maxResolution / minResolution) / Math.log(zoomFactor));\n    minResolution = maxResolution / Math.pow(zoomFactor, maxZoom - minZoom);\n\n    resolutionConstraint = createSnapToPower(\n      zoomFactor, maxResolution, maxZoom - minZoom);\n  }\n  return {constraint: resolutionConstraint, maxResolution: maxResolution,\n    minResolution: minResolution, minZoom: minZoom, zoomFactor: zoomFactor};\n}\n\n\n/**\n * @param {ViewOptions} options View options.\n * @return {import(\"./rotationconstraint.js\").Type} Rotation constraint.\n */\nexport function createRotationConstraint(options) {\n  var enableRotation = options.enableRotation !== undefined ?\n    options.enableRotation : true;\n  if (enableRotation) {\n    var constrainRotation = options.constrainRotation;\n    if (constrainRotation === undefined || constrainRotation === true) {\n      return createSnapToZero();\n    } else if (constrainRotation === false) {\n      return rotationNone;\n    } else if (typeof constrainRotation === 'number') {\n      return createSnapToN(constrainRotation);\n    } else {\n      return rotationNone;\n    }\n  } else {\n    return disable;\n  }\n}\n\n\n/**\n * Determine if an animation involves no view change.\n * @param {Animation} animation The animation.\n * @return {boolean} The animation involves no view change.\n */\nexport function isNoopAnimation(animation) {\n  if (animation.sourceCenter && animation.targetCenter) {\n    if (!coordinatesEqual(animation.sourceCenter, animation.targetCenter)) {\n      return false;\n    }\n  }\n  if (animation.sourceResolution !== animation.targetResolution) {\n    return false;\n  }\n  if (animation.sourceRotation !== animation.targetRotation) {\n    return false;\n  }\n  return true;\n}\n\nexport default View;\n\n//# sourceMappingURL=View.js.map","/**\n * @module ol/layer/Property\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  OPACITY: 'opacity',\n  VISIBLE: 'visible',\n  EXTENT: 'extent',\n  Z_INDEX: 'zIndex',\n  MAX_RESOLUTION: 'maxResolution',\n  MIN_RESOLUTION: 'minResolution',\n  SOURCE: 'source'\n};\n\n//# sourceMappingURL=Property.js.map","/**\n * @module ol/layer/Base\n */\nimport {abstract} from '../util.js';\nimport BaseObject from '../Object.js';\nimport LayerProperty from './Property.js';\nimport {clamp} from '../math.js';\nimport {assign} from '../obj.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n */\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Note that with {@link module:ol/layer/Base} and all its subclasses, any property set in\n * the options is set as a {@link module:ol/Object} property on the layer object, so\n * is observable, and has get/set accessors.\n *\n * @api\n */\nvar BaseLayer = /*@__PURE__*/(function (BaseObject) {\n  function BaseLayer(options) {\n\n    BaseObject.call(this);\n\n    /**\n     * @type {Object<string, *>}\n     */\n    var properties = assign({}, options);\n    properties[LayerProperty.OPACITY] =\n       options.opacity !== undefined ? options.opacity : 1;\n    properties[LayerProperty.VISIBLE] =\n       options.visible !== undefined ? options.visible : true;\n    properties[LayerProperty.Z_INDEX] = options.zIndex;\n    properties[LayerProperty.MAX_RESOLUTION] =\n       options.maxResolution !== undefined ? options.maxResolution : Infinity;\n    properties[LayerProperty.MIN_RESOLUTION] =\n       options.minResolution !== undefined ? options.minResolution : 0;\n\n    this.setProperties(properties);\n\n    /**\n     * @type {import(\"./Layer.js\").State}\n     * @private\n     */\n    this.state_ = null;\n\n    /**\n     * The layer type.\n     * @type {import(\"../LayerType.js\").default}\n     * @protected;\n     */\n    this.type;\n\n  }\n\n  if ( BaseObject ) BaseLayer.__proto__ = BaseObject;\n  BaseLayer.prototype = Object.create( BaseObject && BaseObject.prototype );\n  BaseLayer.prototype.constructor = BaseLayer;\n\n  /**\n   * Get the layer type (used when creating a layer renderer).\n   * @return {import(\"../LayerType.js\").default} The layer type.\n   */\n  BaseLayer.prototype.getType = function getType () {\n    return this.type;\n  };\n\n  /**\n   * @return {import(\"./Layer.js\").State} Layer state.\n   */\n  BaseLayer.prototype.getLayerState = function getLayerState () {\n    /** @type {import(\"./Layer.js\").State} */\n    var state = this.state_ || /** @type {?} */ ({\n      layer: this,\n      managed: true\n    });\n    state.opacity = clamp(this.getOpacity(), 0, 1);\n    state.sourceState = this.getSourceState();\n    state.visible = this.getVisible();\n    state.extent = this.getExtent();\n    state.zIndex = this.getZIndex() || 0;\n    state.maxResolution = this.getMaxResolution();\n    state.minResolution = Math.max(this.getMinResolution(), 0);\n    this.state_ = state;\n\n    return state;\n  };\n\n  /**\n   * @abstract\n   * @param {Array<import(\"./Layer.js\").default>=} opt_array Array of layers (to be\n   *     modified in place).\n   * @return {Array<import(\"./Layer.js\").default>} Array of layers.\n   */\n  BaseLayer.prototype.getLayersArray = function getLayersArray (opt_array) {\n    return abstract();\n  };\n\n  /**\n   * @abstract\n   * @param {Array<import(\"./Layer.js\").State>=} opt_states Optional list of layer\n   *     states (to be modified in place).\n   * @return {Array<import(\"./Layer.js\").State>} List of layer states.\n   */\n  BaseLayer.prototype.getLayerStatesArray = function getLayerStatesArray (opt_states) {\n    return abstract();\n  };\n\n  /**\n   * Return the {@link module:ol/extent~Extent extent} of the layer or `undefined` if it\n   * will be visible regardless of extent.\n   * @return {import(\"../extent.js\").Extent|undefined} The layer extent.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.getExtent = function getExtent () {\n    return (\n      /** @type {import(\"../extent.js\").Extent|undefined} */ (this.get(LayerProperty.EXTENT))\n    );\n  };\n\n  /**\n   * Return the maximum resolution of the layer.\n   * @return {number} The maximum resolution of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.getMaxResolution = function getMaxResolution () {\n    return /** @type {number} */ (this.get(LayerProperty.MAX_RESOLUTION));\n  };\n\n  /**\n   * Return the minimum resolution of the layer.\n   * @return {number} The minimum resolution of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.getMinResolution = function getMinResolution () {\n    return /** @type {number} */ (this.get(LayerProperty.MIN_RESOLUTION));\n  };\n\n  /**\n   * Return the opacity of the layer (between 0 and 1).\n   * @return {number} The opacity of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.getOpacity = function getOpacity () {\n    return /** @type {number} */ (this.get(LayerProperty.OPACITY));\n  };\n\n  /**\n   * @abstract\n   * @return {import(\"../source/State.js\").default} Source state.\n   */\n  BaseLayer.prototype.getSourceState = function getSourceState () {\n    return abstract();\n  };\n\n  /**\n   * Return the visibility of the layer (`true` or `false`).\n   * @return {boolean} The visibility of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.getVisible = function getVisible () {\n    return /** @type {boolean} */ (this.get(LayerProperty.VISIBLE));\n  };\n\n  /**\n   * Return the Z-index of the layer, which is used to order layers before\n   * rendering. The default Z-index is 0.\n   * @return {number} The Z-index of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.getZIndex = function getZIndex () {\n    return /** @type {number} */ (this.get(LayerProperty.Z_INDEX));\n  };\n\n  /**\n   * Set the extent at which the layer is visible.  If `undefined`, the layer\n   * will be visible at all extents.\n   * @param {import(\"../extent.js\").Extent|undefined} extent The extent of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.setExtent = function setExtent (extent) {\n    this.set(LayerProperty.EXTENT, extent);\n  };\n\n  /**\n   * Set the maximum resolution at which the layer is visible.\n   * @param {number} maxResolution The maximum resolution of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.setMaxResolution = function setMaxResolution (maxResolution) {\n    this.set(LayerProperty.MAX_RESOLUTION, maxResolution);\n  };\n\n  /**\n   * Set the minimum resolution at which the layer is visible.\n   * @param {number} minResolution The minimum resolution of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.setMinResolution = function setMinResolution (minResolution) {\n    this.set(LayerProperty.MIN_RESOLUTION, minResolution);\n  };\n\n  /**\n   * Set the opacity of the layer, allowed values range from 0 to 1.\n   * @param {number} opacity The opacity of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.setOpacity = function setOpacity (opacity) {\n    this.set(LayerProperty.OPACITY, opacity);\n  };\n\n  /**\n   * Set the visibility of the layer (`true` or `false`).\n   * @param {boolean} visible The visibility of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.setVisible = function setVisible (visible) {\n    this.set(LayerProperty.VISIBLE, visible);\n  };\n\n  /**\n   * Set Z-index of the layer, which is used to order layers before rendering.\n   * The default Z-index is 0.\n   * @param {number} zindex The z-index of the layer.\n   * @observable\n   * @api\n   */\n  BaseLayer.prototype.setZIndex = function setZIndex (zindex) {\n    this.set(LayerProperty.Z_INDEX, zindex);\n  };\n\n  return BaseLayer;\n}(BaseObject));\n\n\nexport default BaseLayer;\n\n//# sourceMappingURL=Base.js.map","/**\n * @module ol/source/State\n */\n\n/**\n * @enum {string}\n * State of the source, one of 'undefined', 'loading', 'ready' or 'error'.\n */\nexport default {\n  UNDEFINED: 'undefined',\n  LOADING: 'loading',\n  READY: 'ready',\n  ERROR: 'error'\n};\n\n//# sourceMappingURL=State.js.map","/**\n * @module ol/layer/Group\n */\nimport {getUid} from '../util.js';\nimport Collection from '../Collection.js';\nimport CollectionEventType from '../CollectionEventType.js';\nimport {getChangeEventType} from '../Object.js';\nimport ObjectEventType from '../ObjectEventType.js';\nimport {assert} from '../asserts.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {getIntersection} from '../extent.js';\nimport BaseLayer from './Base.js';\nimport {assign, clear} from '../obj.js';\nimport SourceState from '../source/State.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {Array<import(\"./Base.js\").default>|import(\"../Collection.js\").default<import(\"./Base.js\").default>} [layers] Child layers.\n */\n\n\n/**\n * @enum {string}\n * @private\n */\nvar Property = {\n  LAYERS: 'layers'\n};\n\n\n/**\n * @classdesc\n * A {@link module:ol/Collection~Collection} of layers that are handled together.\n *\n * A generic `change` event is triggered when the group/Collection changes.\n *\n * @api\n */\nvar LayerGroup = /*@__PURE__*/(function (BaseLayer) {\n  function LayerGroup(opt_options) {\n\n    var options = opt_options || {};\n    var baseOptions = /** @type {Options} */ (assign({}, options));\n    delete baseOptions.layers;\n\n    var layers = options.layers;\n\n    BaseLayer.call(this, baseOptions);\n\n    /**\n     * @private\n     * @type {Array<import(\"../events.js\").EventsKey>}\n     */\n    this.layersListenerKeys_ = [];\n\n    /**\n     * @private\n     * @type {Object<string, Array<import(\"../events.js\").EventsKey>>}\n     */\n    this.listenerKeys_ = {};\n\n    listen(this,\n      getChangeEventType(Property.LAYERS),\n      this.handleLayersChanged_, this);\n\n    if (layers) {\n      if (Array.isArray(layers)) {\n        layers = new Collection(layers.slice(), {unique: true});\n      } else {\n        assert(typeof /** @type {?} */ (layers).getArray === 'function',\n          43); // Expected `layers` to be an array or a `Collection`\n      }\n    } else {\n      layers = new Collection(undefined, {unique: true});\n    }\n\n    this.setLayers(layers);\n\n  }\n\n  if ( BaseLayer ) LayerGroup.__proto__ = BaseLayer;\n  LayerGroup.prototype = Object.create( BaseLayer && BaseLayer.prototype );\n  LayerGroup.prototype.constructor = LayerGroup;\n\n  /**\n   * @private\n   */\n  LayerGroup.prototype.handleLayerChange_ = function handleLayerChange_ () {\n    this.changed();\n  };\n\n  /**\n   * @private\n   */\n  LayerGroup.prototype.handleLayersChanged_ = function handleLayersChanged_ () {\n    this.layersListenerKeys_.forEach(unlistenByKey);\n    this.layersListenerKeys_.length = 0;\n\n    var layers = this.getLayers();\n    this.layersListenerKeys_.push(\n      listen(layers, CollectionEventType.ADD, this.handleLayersAdd_, this),\n      listen(layers, CollectionEventType.REMOVE, this.handleLayersRemove_, this)\n    );\n\n    for (var id in this.listenerKeys_) {\n      this.listenerKeys_[id].forEach(unlistenByKey);\n    }\n    clear(this.listenerKeys_);\n\n    var layersArray = layers.getArray();\n    for (var i = 0, ii = layersArray.length; i < ii; i++) {\n      var layer = layersArray[i];\n      this.listenerKeys_[getUid(layer)] = [\n        listen(layer, ObjectEventType.PROPERTYCHANGE, this.handleLayerChange_, this),\n        listen(layer, EventType.CHANGE, this.handleLayerChange_, this)\n      ];\n    }\n\n    this.changed();\n  };\n\n  /**\n   * @param {import(\"../Collection.js\").CollectionEvent} collectionEvent CollectionEvent.\n   * @private\n   */\n  LayerGroup.prototype.handleLayersAdd_ = function handleLayersAdd_ (collectionEvent) {\n    var layer = /** @type {import(\"./Base.js\").default} */ (collectionEvent.element);\n    this.listenerKeys_[getUid(layer)] = [\n      listen(layer, ObjectEventType.PROPERTYCHANGE, this.handleLayerChange_, this),\n      listen(layer, EventType.CHANGE, this.handleLayerChange_, this)\n    ];\n    this.changed();\n  };\n\n  /**\n   * @param {import(\"../Collection.js\").CollectionEvent} collectionEvent CollectionEvent.\n   * @private\n   */\n  LayerGroup.prototype.handleLayersRemove_ = function handleLayersRemove_ (collectionEvent) {\n    var layer = /** @type {import(\"./Base.js\").default} */ (collectionEvent.element);\n    var key = getUid(layer);\n    this.listenerKeys_[key].forEach(unlistenByKey);\n    delete this.listenerKeys_[key];\n    this.changed();\n  };\n\n  /**\n   * Returns the {@link module:ol/Collection collection} of {@link module:ol/layer/Layer~Layer layers}\n   * in this group.\n   * @return {!import(\"../Collection.js\").default<import(\"./Base.js\").default>} Collection of\n   *   {@link module:ol/layer/Base layers} that are part of this group.\n   * @observable\n   * @api\n   */\n  LayerGroup.prototype.getLayers = function getLayers () {\n    return (\n      /** @type {!import(\"../Collection.js\").default<import(\"./Base.js\").default>} */ (this.get(Property.LAYERS))\n    );\n  };\n\n  /**\n   * Set the {@link module:ol/Collection collection} of {@link module:ol/layer/Layer~Layer layers}\n   * in this group.\n   * @param {!import(\"../Collection.js\").default<import(\"./Base.js\").default>} layers Collection of\n   *   {@link module:ol/layer/Base layers} that are part of this group.\n   * @observable\n   * @api\n   */\n  LayerGroup.prototype.setLayers = function setLayers (layers) {\n    this.set(Property.LAYERS, layers);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  LayerGroup.prototype.getLayersArray = function getLayersArray (opt_array) {\n    var array = opt_array !== undefined ? opt_array : [];\n    this.getLayers().forEach(function(layer) {\n      layer.getLayersArray(array);\n    });\n    return array;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  LayerGroup.prototype.getLayerStatesArray = function getLayerStatesArray (opt_states) {\n    var states = opt_states !== undefined ? opt_states : [];\n\n    var pos = states.length;\n\n    this.getLayers().forEach(function(layer) {\n      layer.getLayerStatesArray(states);\n    });\n\n    var ownLayerState = this.getLayerState();\n    for (var i = pos, ii = states.length; i < ii; i++) {\n      var layerState = states[i];\n      layerState.opacity *= ownLayerState.opacity;\n      layerState.visible = layerState.visible && ownLayerState.visible;\n      layerState.maxResolution = Math.min(\n        layerState.maxResolution, ownLayerState.maxResolution);\n      layerState.minResolution = Math.max(\n        layerState.minResolution, ownLayerState.minResolution);\n      if (ownLayerState.extent !== undefined) {\n        if (layerState.extent !== undefined) {\n          layerState.extent = getIntersection(layerState.extent, ownLayerState.extent);\n        } else {\n          layerState.extent = ownLayerState.extent;\n        }\n      }\n    }\n\n    return states;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  LayerGroup.prototype.getSourceState = function getSourceState () {\n    return SourceState.READY;\n  };\n\n  return LayerGroup;\n}(BaseLayer));\n\n\nexport default LayerGroup;\n\n//# sourceMappingURL=Group.js.map","/**\n * @module ol/size\n */\n\n\n/**\n * An array of numbers representing a size: `[width, height]`.\n * @typedef {Array<number>} Size\n * @api\n */\n\n\n/**\n * Returns a buffered size.\n * @param {Size} size Size.\n * @param {number} num The amount by which to buffer.\n * @param {Size=} opt_size Optional reusable size array.\n * @return {Size} The buffered size.\n */\nexport function buffer(size, num, opt_size) {\n  if (opt_size === undefined) {\n    opt_size = [0, 0];\n  }\n  opt_size[0] = size[0] + 2 * num;\n  opt_size[1] = size[1] + 2 * num;\n  return opt_size;\n}\n\n\n/**\n * Determines if a size has a positive area.\n * @param {Size} size The size to test.\n * @return {boolean} The size has a positive area.\n */\nexport function hasArea(size) {\n  return size[0] > 0 && size[1] > 0;\n}\n\n\n/**\n * Returns a size scaled by a ratio. The result will be an array of integers.\n * @param {Size} size Size.\n * @param {number} ratio Ratio.\n * @param {Size=} opt_size Optional reusable size array.\n * @return {Size} The scaled size.\n */\nexport function scale(size, ratio, opt_size) {\n  if (opt_size === undefined) {\n    opt_size = [0, 0];\n  }\n  opt_size[0] = (size[0] * ratio + 0.5) | 0;\n  opt_size[1] = (size[1] * ratio + 0.5) | 0;\n  return opt_size;\n}\n\n\n/**\n * Returns an `Size` array for the passed in number (meaning: square) or\n * `Size` array.\n * (meaning: non-square),\n * @param {number|Size} size Width and height.\n * @param {Size=} opt_size Optional reusable size array.\n * @return {Size} Size.\n * @api\n */\nexport function toSize(size, opt_size) {\n  if (Array.isArray(size)) {\n    return size;\n  } else {\n    if (opt_size === undefined) {\n      opt_size = [size, size];\n    } else {\n      opt_size[0] = opt_size[1] = /** @type {number} */ (size);\n    }\n    return opt_size;\n  }\n}\n\n//# sourceMappingURL=size.js.map","/**\n * @module ol/PluggableMap\n */\nimport {getUid} from './util.js';\nimport Collection from './Collection.js';\nimport CollectionEventType from './CollectionEventType.js';\nimport MapBrowserEvent from './MapBrowserEvent.js';\nimport MapBrowserEventHandler from './MapBrowserEventHandler.js';\nimport MapBrowserEventType from './MapBrowserEventType.js';\nimport MapEvent from './MapEvent.js';\nimport MapEventType from './MapEventType.js';\nimport MapProperty from './MapProperty.js';\nimport RenderEventType from './render/EventType.js';\nimport BaseObject, {getChangeEventType} from './Object.js';\nimport ObjectEventType from './ObjectEventType.js';\nimport TileQueue from './TileQueue.js';\nimport View from './View.js';\nimport ViewHint from './ViewHint.js';\nimport {assert} from './asserts.js';\nimport {removeNode} from './dom.js';\nimport {listen, unlistenByKey, unlisten} from './events.js';\nimport {stopPropagation} from './events/Event.js';\nimport EventType from './events/EventType.js';\nimport {createEmpty, clone, createOrUpdateEmpty, equals, getForViewAndSize, isEmpty} from './extent.js';\nimport {TRUE} from './functions.js';\nimport {DEVICE_PIXEL_RATIO, TOUCH} from './has.js';\nimport LayerGroup from './layer/Group.js';\nimport {hasArea} from './size.js';\nimport {DROP} from './structs/PriorityQueue.js';\nimport {create as createTransform, apply as applyTransform} from './transform.js';\n\n\n/**\n * State of the current frame. Only `pixelRatio`, `time` and `viewState` should\n * be used in applications.\n * @typedef {Object} FrameState\n * @property {number} pixelRatio The pixel ratio of the frame.\n * @property {number} time The time when rendering of the frame was requested.\n * @property {import(\"./View.js\").State} viewState The state of the current view.\n * @property {boolean} animate\n * @property {import(\"./transform.js\").Transform} coordinateToPixelTransform\n * @property {null|import(\"./extent.js\").Extent} extent\n * @property {import(\"./coordinate.js\").Coordinate} focus\n * @property {number} index\n * @property {Object<string, import(\"./layer/Layer.js\").State>} layerStates\n * @property {Array<import(\"./layer/Layer.js\").State>} layerStatesArray\n * @property {import(\"./transform.js\").Transform} pixelToCoordinateTransform\n * @property {Array<PostRenderFunction>} postRenderFunctions\n * @property {import(\"./size.js\").Size} size\n * @property {!Object<string, boolean>} skippedFeatureUids\n * @property {TileQueue} tileQueue\n * @property {Object<string, Object<string, import(\"./TileRange.js\").default>>} usedTiles\n * @property {Array<number>} viewHints\n * @property {!Object<string, Object<string, boolean>>} wantedTiles\n */\n\n\n/**\n * @typedef {function(PluggableMap, ?FrameState): boolean} PostRenderFunction\n */\n\n\n/**\n * @typedef {Object} AtPixelOptions\n * @property {undefined|function(import(\"./layer/Layer.js\").default): boolean} layerFilter Layer filter\n * function. The filter function will receive one argument, the\n * {@link module:ol/layer/Layer layer-candidate} and it should return a boolean value.\n * Only layers which are visible and for which this function returns `true`\n * will be tested for features. By default, all visible layers will be tested.\n * @property {number} [hitTolerance=0] Hit-detection tolerance in pixels. Pixels\n * inside the radius around the given position will be checked for features. This only\n * works for the canvas renderer and not for WebGL.\n */\n\n\n/**\n * @typedef {Object} MapOptionsInternal\n * @property {Collection<import(\"./control/Control.js\").default>} [controls]\n * @property {Collection<import(\"./interaction/Interaction.js\").default>} [interactions]\n * @property {HTMLElement|Document} keyboardEventTarget\n * @property {Collection<import(\"./Overlay.js\").default>} overlays\n * @property {Object<string, *>} values\n */\n\n\n/**\n * Object literal with config options for the map.\n * @typedef {Object} MapOptions\n * @property {Collection<import(\"./control/Control.js\").default>|Array<import(\"./control/Control.js\").default>} [controls]\n * Controls initially added to the map. If not specified,\n * {@link module:ol/control~defaults} is used.\n * @property {number} [pixelRatio=window.devicePixelRatio] The ratio between\n * physical pixels and device-independent pixels (dips) on the device.\n * @property {Collection<import(\"./interaction/Interaction.js\").default>|Array<import(\"./interaction/Interaction.js\").default>} [interactions]\n * Interactions that are initially added to the map. If not specified,\n * {@link module:ol/interaction~defaults} is used.\n * @property {HTMLElement|Document|string} [keyboardEventTarget] The element to\n * listen to keyboard events on. This determines when the `KeyboardPan` and\n * `KeyboardZoom` interactions trigger. For example, if this option is set to\n * `document` the keyboard interactions will always trigger. If this option is\n * not specified, the element the library listens to keyboard events on is the\n * map target (i.e. the user-provided div for the map). If this is not\n * `document`, the target element needs to be focused for key events to be\n * emitted, requiring that the target element has a `tabindex` attribute.\n * @property {Array<import(\"./layer/Base.js\").default>|Collection<import(\"./layer/Base.js\").default>|LayerGroup} [layers]\n * Layers. If this is not defined, a map with no layers will be rendered. Note\n * that layers are rendered in the order supplied, so if you want, for example,\n * a vector layer to appear on top of a tile layer, it must come after the tile\n * layer.\n * @property {number} [maxTilesLoading=16] Maximum number tiles to load\n * simultaneously.\n * @property {boolean} [loadTilesWhileAnimating=false] When set to `true`, tiles\n * will be loaded during animations. This may improve the user experience, but\n * can also make animations stutter on devices with slow memory.\n * @property {boolean} [loadTilesWhileInteracting=false] When set to `true`,\n * tiles will be loaded while interacting with the map. This may improve the\n * user experience, but can also make map panning and zooming choppy on devices\n * with slow memory.\n * @property {number} [moveTolerance=1] The minimum distance in pixels the\n * cursor must move to be detected as a map move event instead of a click.\n * Increasing this value can make it easier to click on the map.\n * @property {Collection<import(\"./Overlay.js\").default>|Array<import(\"./Overlay.js\").default>} [overlays]\n * Overlays initially added to the map. By default, no overlays are added.\n * @property {HTMLElement|string} [target] The container for the map, either the\n * element itself or the `id` of the element. If not specified at construction\n * time, {@link module:ol/Map~Map#setTarget} must be called for the map to be\n * rendered.\n * @property {View} [view] The map's view.  No layer sources will be\n * fetched unless this is specified at construction time or through\n * {@link module:ol/Map~Map#setView}.\n */\n\n\n/**\n * @fires import(\"./MapBrowserEvent.js\").MapBrowserEvent\n * @fires import(\"./MapEvent.js\").MapEvent\n * @fires module:ol/render/Event~RenderEvent#postcompose\n * @fires module:ol/render/Event~RenderEvent#precompose\n * @fires module:ol/render/Event~RenderEvent#rendercomplete\n * @api\n */\nvar PluggableMap = /*@__PURE__*/(function (BaseObject) {\n  function PluggableMap(options) {\n\n    BaseObject.call(this);\n\n    var optionsInternal = createOptionsInternal(options);\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.maxTilesLoading_ = options.maxTilesLoading !== undefined ? options.maxTilesLoading : 16;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.loadTilesWhileAnimating_ =\n        options.loadTilesWhileAnimating !== undefined ?\n          options.loadTilesWhileAnimating : false;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.loadTilesWhileInteracting_ =\n        options.loadTilesWhileInteracting !== undefined ?\n          options.loadTilesWhileInteracting : false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.pixelRatio_ = options.pixelRatio !== undefined ?\n      options.pixelRatio : DEVICE_PIXEL_RATIO;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.animationDelayKey_;\n\n    /**\n     * @private\n     */\n    this.animationDelay_ = function() {\n      this.animationDelayKey_ = undefined;\n      this.renderFrame_.call(this, Date.now());\n    }.bind(this);\n\n    /**\n     * @private\n     * @type {import(\"./transform.js\").Transform}\n     */\n    this.coordinateToPixelTransform_ = createTransform();\n\n    /**\n     * @private\n     * @type {import(\"./transform.js\").Transform}\n     */\n    this.pixelToCoordinateTransform_ = createTransform();\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.frameIndex_ = 0;\n\n    /**\n     * @private\n     * @type {?FrameState}\n     */\n    this.frameState_ = null;\n\n    /**\n     * The extent at the previous 'moveend' event.\n     * @private\n     * @type {import(\"./extent.js\").Extent}\n     */\n    this.previousExtent_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"./events.js\").EventsKey}\n     */\n    this.viewPropertyListenerKey_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"./events.js\").EventsKey}\n     */\n    this.viewChangeListenerKey_ = null;\n\n    /**\n     * @private\n     * @type {Array<import(\"./events.js\").EventsKey>}\n     */\n    this.layerGroupPropertyListenerKeys_ = null;\n\n    /**\n     * @private\n     * @type {!HTMLElement}\n     */\n    this.viewport_ = document.createElement('div');\n    this.viewport_.className = 'ol-viewport' + (TOUCH ? ' ol-touch' : '');\n    this.viewport_.style.position = 'relative';\n    this.viewport_.style.overflow = 'hidden';\n    this.viewport_.style.width = '100%';\n    this.viewport_.style.height = '100%';\n    // prevent page zoom on IE >= 10 browsers\n    this.viewport_.style.msTouchAction = 'none';\n    this.viewport_.style.touchAction = 'none';\n\n    /**\n     * @private\n     * @type {!HTMLElement}\n     */\n    this.overlayContainer_ = document.createElement('div');\n    this.overlayContainer_.className = 'ol-overlaycontainer';\n    this.viewport_.appendChild(this.overlayContainer_);\n\n    /**\n     * @private\n     * @type {!HTMLElement}\n     */\n    this.overlayContainerStopEvent_ = document.createElement('div');\n    this.overlayContainerStopEvent_.className = 'ol-overlaycontainer-stopevent';\n    var overlayEvents = [\n      EventType.CLICK,\n      EventType.DBLCLICK,\n      EventType.MOUSEDOWN,\n      EventType.TOUCHSTART,\n      EventType.MSPOINTERDOWN,\n      MapBrowserEventType.POINTERDOWN,\n      EventType.MOUSEWHEEL,\n      EventType.WHEEL\n    ];\n    for (var i = 0, ii = overlayEvents.length; i < ii; ++i) {\n      listen(this.overlayContainerStopEvent_, overlayEvents[i], stopPropagation);\n    }\n    this.viewport_.appendChild(this.overlayContainerStopEvent_);\n\n    /**\n     * @private\n     * @type {MapBrowserEventHandler}\n     */\n    this.mapBrowserEventHandler_ = new MapBrowserEventHandler(this, options.moveTolerance);\n    for (var key in MapBrowserEventType) {\n      listen(this.mapBrowserEventHandler_, MapBrowserEventType[key],\n        this.handleMapBrowserEvent, this);\n    }\n\n    /**\n     * @private\n     * @type {HTMLElement|Document}\n     */\n    this.keyboardEventTarget_ = optionsInternal.keyboardEventTarget;\n\n    /**\n     * @private\n     * @type {Array<import(\"./events.js\").EventsKey>}\n     */\n    this.keyHandlerKeys_ = null;\n\n    listen(this.viewport_, EventType.CONTEXTMENU, this.handleBrowserEvent, this);\n    listen(this.viewport_, EventType.WHEEL, this.handleBrowserEvent, this);\n    listen(this.viewport_, EventType.MOUSEWHEEL, this.handleBrowserEvent, this);\n\n    /**\n     * @type {Collection<import(\"./control/Control.js\").default>}\n     * @protected\n     */\n    this.controls = optionsInternal.controls || new Collection();\n\n    /**\n     * @type {Collection<import(\"./interaction/Interaction.js\").default>}\n     * @protected\n     */\n    this.interactions = optionsInternal.interactions || new Collection();\n\n    /**\n     * @type {Collection<import(\"./Overlay.js\").default>}\n     * @private\n     */\n    this.overlays_ = optionsInternal.overlays;\n\n    /**\n     * A lookup of overlays by id.\n     * @private\n     * @type {Object<string, import(\"./Overlay.js\").default>}\n     */\n    this.overlayIdIndex_ = {};\n\n    /**\n     * @type {import(\"./renderer/Map.js\").default}\n     * @private\n     */\n    this.renderer_ = this.createRenderer();\n\n    /**\n     * @type {function(Event)|undefined}\n     * @private\n     */\n    this.handleResize_;\n\n    /**\n     * @private\n     * @type {import(\"./coordinate.js\").Coordinate}\n     */\n    this.focus_ = null;\n\n    /**\n     * @private\n     * @type {!Array<PostRenderFunction>}\n     */\n    this.postRenderFunctions_ = [];\n\n    /**\n     * @private\n     * @type {TileQueue}\n     */\n    this.tileQueue_ = new TileQueue(\n      this.getTilePriority.bind(this),\n      this.handleTileChange_.bind(this));\n\n    /**\n     * Uids of features to skip at rendering time.\n     * @type {Object<string, boolean>}\n     * @private\n     */\n    this.skippedFeatureUids_ = {};\n\n    listen(\n      this, getChangeEventType(MapProperty.LAYERGROUP),\n      this.handleLayerGroupChanged_, this);\n    listen(this, getChangeEventType(MapProperty.VIEW),\n      this.handleViewChanged_, this);\n    listen(this, getChangeEventType(MapProperty.SIZE),\n      this.handleSizeChanged_, this);\n    listen(this, getChangeEventType(MapProperty.TARGET),\n      this.handleTargetChanged_, this);\n\n    // setProperties will trigger the rendering of the map if the map\n    // is \"defined\" already.\n    this.setProperties(optionsInternal.values);\n\n    this.controls.forEach(\n      /**\n       * @param {import(\"./control/Control.js\").default} control Control.\n       * @this {PluggableMap}\n       */\n      (function(control) {\n        control.setMap(this);\n      }).bind(this));\n\n    listen(this.controls, CollectionEventType.ADD,\n      /**\n       * @param {import(\"./Collection.js\").CollectionEvent} event CollectionEvent.\n       */\n      function(event) {\n        event.element.setMap(this);\n      }, this);\n\n    listen(this.controls, CollectionEventType.REMOVE,\n      /**\n       * @param {import(\"./Collection.js\").CollectionEvent} event CollectionEvent.\n       */\n      function(event) {\n        event.element.setMap(null);\n      }, this);\n\n    this.interactions.forEach(\n      /**\n       * @param {import(\"./interaction/Interaction.js\").default} interaction Interaction.\n       * @this {PluggableMap}\n       */\n      (function(interaction) {\n        interaction.setMap(this);\n      }).bind(this));\n\n    listen(this.interactions, CollectionEventType.ADD,\n      /**\n       * @param {import(\"./Collection.js\").CollectionEvent} event CollectionEvent.\n       */\n      function(event) {\n        event.element.setMap(this);\n      }, this);\n\n    listen(this.interactions, CollectionEventType.REMOVE,\n      /**\n       * @param {import(\"./Collection.js\").CollectionEvent} event CollectionEvent.\n       */\n      function(event) {\n        event.element.setMap(null);\n      }, this);\n\n    this.overlays_.forEach(this.addOverlayInternal_.bind(this));\n\n    listen(this.overlays_, CollectionEventType.ADD,\n      /**\n       * @param {import(\"./Collection.js\").CollectionEvent} event CollectionEvent.\n       */\n      function(event) {\n        this.addOverlayInternal_(/** @type {import(\"./Overlay.js\").default} */ (event.element));\n      }, this);\n\n    listen(this.overlays_, CollectionEventType.REMOVE,\n      /**\n       * @param {import(\"./Collection.js\").CollectionEvent} event CollectionEvent.\n       */\n      function(event) {\n        var overlay = /** @type {import(\"./Overlay.js\").default} */ (event.element);\n        var id = overlay.getId();\n        if (id !== undefined) {\n          delete this.overlayIdIndex_[id.toString()];\n        }\n        event.element.setMap(null);\n      }, this);\n\n  }\n\n  if ( BaseObject ) PluggableMap.__proto__ = BaseObject;\n  PluggableMap.prototype = Object.create( BaseObject && BaseObject.prototype );\n  PluggableMap.prototype.constructor = PluggableMap;\n\n  /**\n   * @abstract\n   * @return {import(\"./renderer/Map.js\").default} The map renderer\n   */\n  PluggableMap.prototype.createRenderer = function createRenderer () {\n    throw new Error('Use a map type that has a createRenderer method');\n  };\n\n  /**\n   * Add the given control to the map.\n   * @param {import(\"./control/Control.js\").default} control Control.\n   * @api\n   */\n  PluggableMap.prototype.addControl = function addControl (control) {\n    this.getControls().push(control);\n  };\n\n  /**\n   * Add the given interaction to the map.\n   * @param {import(\"./interaction/Interaction.js\").default} interaction Interaction to add.\n   * @api\n   */\n  PluggableMap.prototype.addInteraction = function addInteraction (interaction) {\n    this.getInteractions().push(interaction);\n  };\n\n  /**\n   * Adds the given layer to the top of this map. If you want to add a layer\n   * elsewhere in the stack, use `getLayers()` and the methods available on\n   * {@link module:ol/Collection~Collection}.\n   * @param {import(\"./layer/Base.js\").default} layer Layer.\n   * @api\n   */\n  PluggableMap.prototype.addLayer = function addLayer (layer) {\n    var layers = this.getLayerGroup().getLayers();\n    layers.push(layer);\n  };\n\n  /**\n   * Add the given overlay to the map.\n   * @param {import(\"./Overlay.js\").default} overlay Overlay.\n   * @api\n   */\n  PluggableMap.prototype.addOverlay = function addOverlay (overlay) {\n    this.getOverlays().push(overlay);\n  };\n\n  /**\n   * This deals with map's overlay collection changes.\n   * @param {import(\"./Overlay.js\").default} overlay Overlay.\n   * @private\n   */\n  PluggableMap.prototype.addOverlayInternal_ = function addOverlayInternal_ (overlay) {\n    var id = overlay.getId();\n    if (id !== undefined) {\n      this.overlayIdIndex_[id.toString()] = overlay;\n    }\n    overlay.setMap(this);\n  };\n\n  /**\n   *\n   * @inheritDoc\n   */\n  PluggableMap.prototype.disposeInternal = function disposeInternal () {\n    this.mapBrowserEventHandler_.dispose();\n    unlisten(this.viewport_, EventType.CONTEXTMENU, this.handleBrowserEvent, this);\n    unlisten(this.viewport_, EventType.WHEEL, this.handleBrowserEvent, this);\n    unlisten(this.viewport_, EventType.MOUSEWHEEL, this.handleBrowserEvent, this);\n    if (this.handleResize_ !== undefined) {\n      removeEventListener(EventType.RESIZE, this.handleResize_, false);\n      this.handleResize_ = undefined;\n    }\n    if (this.animationDelayKey_) {\n      cancelAnimationFrame(this.animationDelayKey_);\n      this.animationDelayKey_ = undefined;\n    }\n    this.setTarget(null);\n    BaseObject.prototype.disposeInternal.call(this);\n  };\n\n  /**\n   * Detect features that intersect a pixel on the viewport, and execute a\n   * callback with each intersecting feature. Layers included in the detection can\n   * be configured through the `layerFilter` option in `opt_options`.\n   * @param {import(\"./pixel.js\").Pixel} pixel Pixel.\n   * @param {function(this: S, import(\"./Feature.js\").FeatureLike,\n   *     import(\"./layer/Layer.js\").default): T} callback Feature callback. The callback will be\n   *     called with two arguments. The first argument is one\n   *     {@link module:ol/Feature feature} or\n   *     {@link module:ol/render/Feature render feature} at the pixel, the second is\n   *     the {@link module:ol/layer/Layer layer} of the feature and will be null for\n   *     unmanaged layers. To stop detection, callback functions can return a\n   *     truthy value.\n   * @param {AtPixelOptions=} opt_options Optional options.\n   * @return {T|undefined} Callback result, i.e. the return value of last\n   * callback execution, or the first truthy callback return value.\n   * @template S,T\n   * @api\n   */\n  PluggableMap.prototype.forEachFeatureAtPixel = function forEachFeatureAtPixel (pixel, callback, opt_options) {\n    if (!this.frameState_) {\n      return;\n    }\n    var coordinate = this.getCoordinateFromPixel(pixel);\n    opt_options = opt_options !== undefined ? opt_options :\n      /** @type {AtPixelOptions} */ ({});\n    var hitTolerance = opt_options.hitTolerance !== undefined ?\n      opt_options.hitTolerance * this.frameState_.pixelRatio : 0;\n    var layerFilter = opt_options.layerFilter !== undefined ?\n      opt_options.layerFilter : TRUE;\n    return this.renderer_.forEachFeatureAtCoordinate(\n      coordinate, this.frameState_, hitTolerance, callback, null,\n      layerFilter, null);\n  };\n\n  /**\n   * Get all features that intersect a pixel on the viewport.\n   * @param {import(\"./pixel.js\").Pixel} pixel Pixel.\n   * @param {AtPixelOptions=} opt_options Optional options.\n   * @return {Array<import(\"./Feature.js\").FeatureLike>} The detected features or\n   * `null` if none were found.\n   * @api\n   */\n  PluggableMap.prototype.getFeaturesAtPixel = function getFeaturesAtPixel (pixel, opt_options) {\n    var features = null;\n    this.forEachFeatureAtPixel(pixel, function(feature) {\n      if (!features) {\n        features = [];\n      }\n      features.push(feature);\n    }, opt_options);\n    return features;\n  };\n\n  /**\n   * Detect layers that have a color value at a pixel on the viewport, and\n   * execute a callback with each matching layer. Layers included in the\n   * detection can be configured through `opt_layerFilter`.\n   * @param {import(\"./pixel.js\").Pixel} pixel Pixel.\n   * @param {function(this: S, import(\"./layer/Layer.js\").default, (Uint8ClampedArray|Uint8Array)): T} callback\n   *     Layer callback. This callback will receive two arguments: first is the\n   *     {@link module:ol/layer/Layer layer}, second argument is an array representing\n   *     [R, G, B, A] pixel values (0 - 255) and will be `null` for layer types\n   *     that do not currently support this argument. To stop detection, callback\n   *     functions can return a truthy value.\n   * @param {AtPixelOptions=} opt_options Configuration options.\n   * @return {T|undefined} Callback result, i.e. the return value of last\n   * callback execution, or the first truthy callback return value.\n   * @template S,T\n   * @api\n   */\n  PluggableMap.prototype.forEachLayerAtPixel = function forEachLayerAtPixel (pixel, callback, opt_options) {\n    if (!this.frameState_) {\n      return;\n    }\n    var options = opt_options || /** @type {AtPixelOptions} */ ({});\n    var hitTolerance = options.hitTolerance !== undefined ?\n      opt_options.hitTolerance * this.frameState_.pixelRatio : 0;\n    var layerFilter = options.layerFilter || TRUE;\n    return this.renderer_.forEachLayerAtPixel(\n      pixel, this.frameState_, hitTolerance, callback, null, layerFilter, null);\n  };\n\n  /**\n   * Detect if features intersect a pixel on the viewport. Layers included in the\n   * detection can be configured through `opt_layerFilter`.\n   * @param {import(\"./pixel.js\").Pixel} pixel Pixel.\n   * @param {AtPixelOptions=} opt_options Optional options.\n   * @return {boolean} Is there a feature at the given pixel?\n   * @template U\n   * @api\n   */\n  PluggableMap.prototype.hasFeatureAtPixel = function hasFeatureAtPixel (pixel, opt_options) {\n    if (!this.frameState_) {\n      return false;\n    }\n    var coordinate = this.getCoordinateFromPixel(pixel);\n    opt_options = opt_options !== undefined ? opt_options :\n      /** @type {AtPixelOptions} */ ({});\n    var layerFilter = opt_options.layerFilter !== undefined ? opt_options.layerFilter : TRUE;\n    var hitTolerance = opt_options.hitTolerance !== undefined ?\n      opt_options.hitTolerance * this.frameState_.pixelRatio : 0;\n    return this.renderer_.hasFeatureAtCoordinate(\n      coordinate, this.frameState_, hitTolerance, layerFilter, null);\n  };\n\n  /**\n   * Returns the coordinate in view projection for a browser event.\n   * @param {Event} event Event.\n   * @return {import(\"./coordinate.js\").Coordinate} Coordinate.\n   * @api\n   */\n  PluggableMap.prototype.getEventCoordinate = function getEventCoordinate (event) {\n    return this.getCoordinateFromPixel(this.getEventPixel(event));\n  };\n\n  /**\n   * Returns the map pixel position for a browser event relative to the viewport.\n   * @param {Event|TouchEvent} event Event.\n   * @return {import(\"./pixel.js\").Pixel} Pixel.\n   * @api\n   */\n  PluggableMap.prototype.getEventPixel = function getEventPixel (event) {\n    var viewportPosition = this.viewport_.getBoundingClientRect();\n    var eventPosition = 'changedTouches' in event ?\n      /** @type {TouchEvent} */ (event).changedTouches[0] :\n      /** @type {MouseEvent} */ (event);\n\n    return [\n      eventPosition.clientX - viewportPosition.left,\n      eventPosition.clientY - viewportPosition.top\n    ];\n  };\n\n  /**\n   * Get the target in which this map is rendered.\n   * Note that this returns what is entered as an option or in setTarget:\n   * if that was an element, it returns an element; if a string, it returns that.\n   * @return {HTMLElement|string|undefined} The Element or id of the Element that the\n   *     map is rendered in.\n   * @observable\n   * @api\n   */\n  PluggableMap.prototype.getTarget = function getTarget () {\n    return /** @type {HTMLElement|string|undefined} */ (this.get(MapProperty.TARGET));\n  };\n\n  /**\n   * Get the DOM element into which this map is rendered. In contrast to\n   * `getTarget` this method always return an `Element`, or `null` if the\n   * map has no target.\n   * @return {HTMLElement} The element that the map is rendered in.\n   * @api\n   */\n  PluggableMap.prototype.getTargetElement = function getTargetElement () {\n    var target = this.getTarget();\n    if (target !== undefined) {\n      return typeof target === 'string' ? document.getElementById(target) : target;\n    } else {\n      return null;\n    }\n  };\n\n  /**\n   * Get the coordinate for a given pixel.  This returns a coordinate in the\n   * map view projection.\n   * @param {import(\"./pixel.js\").Pixel} pixel Pixel position in the map viewport.\n   * @return {import(\"./coordinate.js\").Coordinate} The coordinate for the pixel position.\n   * @api\n   */\n  PluggableMap.prototype.getCoordinateFromPixel = function getCoordinateFromPixel (pixel) {\n    var frameState = this.frameState_;\n    if (!frameState) {\n      return null;\n    } else {\n      return applyTransform(frameState.pixelToCoordinateTransform, pixel.slice());\n    }\n  };\n\n  /**\n   * Get the map controls. Modifying this collection changes the controls\n   * associated with the map.\n   * @return {Collection<import(\"./control/Control.js\").default>} Controls.\n   * @api\n   */\n  PluggableMap.prototype.getControls = function getControls () {\n    return this.controls;\n  };\n\n  /**\n   * Get the map overlays. Modifying this collection changes the overlays\n   * associated with the map.\n   * @return {Collection<import(\"./Overlay.js\").default>} Overlays.\n   * @api\n   */\n  PluggableMap.prototype.getOverlays = function getOverlays () {\n    return this.overlays_;\n  };\n\n  /**\n   * Get an overlay by its identifier (the value returned by overlay.getId()).\n   * Note that the index treats string and numeric identifiers as the same. So\n   * `map.getOverlayById(2)` will return an overlay with id `'2'` or `2`.\n   * @param {string|number} id Overlay identifier.\n   * @return {import(\"./Overlay.js\").default} Overlay.\n   * @api\n   */\n  PluggableMap.prototype.getOverlayById = function getOverlayById (id) {\n    var overlay = this.overlayIdIndex_[id.toString()];\n    return overlay !== undefined ? overlay : null;\n  };\n\n  /**\n   * Get the map interactions. Modifying this collection changes the interactions\n   * associated with the map.\n   *\n   * Interactions are used for e.g. pan, zoom and rotate.\n   * @return {Collection<import(\"./interaction/Interaction.js\").default>} Interactions.\n   * @api\n   */\n  PluggableMap.prototype.getInteractions = function getInteractions () {\n    return this.interactions;\n  };\n\n  /**\n   * Get the layergroup associated with this map.\n   * @return {LayerGroup} A layer group containing the layers in this map.\n   * @observable\n   * @api\n   */\n  PluggableMap.prototype.getLayerGroup = function getLayerGroup () {\n    return (\n      /** @type {LayerGroup} */ (this.get(MapProperty.LAYERGROUP))\n    );\n  };\n\n  /**\n   * Get the collection of layers associated with this map.\n   * @return {!Collection<import(\"./layer/Base.js\").default>} Layers.\n   * @api\n   */\n  PluggableMap.prototype.getLayers = function getLayers () {\n    var layers = this.getLayerGroup().getLayers();\n    return layers;\n  };\n\n  /**\n   * Get the pixel for a coordinate.  This takes a coordinate in the map view\n   * projection and returns the corresponding pixel.\n   * @param {import(\"./coordinate.js\").Coordinate} coordinate A map coordinate.\n   * @return {import(\"./pixel.js\").Pixel} A pixel position in the map viewport.\n   * @api\n   */\n  PluggableMap.prototype.getPixelFromCoordinate = function getPixelFromCoordinate (coordinate) {\n    var frameState = this.frameState_;\n    if (!frameState) {\n      return null;\n    } else {\n      return applyTransform(frameState.coordinateToPixelTransform, coordinate.slice(0, 2));\n    }\n  };\n\n  /**\n   * Get the map renderer.\n   * @return {import(\"./renderer/Map.js\").default} Renderer\n   */\n  PluggableMap.prototype.getRenderer = function getRenderer () {\n    return this.renderer_;\n  };\n\n  /**\n   * Get the size of this map.\n   * @return {import(\"./size.js\").Size|undefined} The size in pixels of the map in the DOM.\n   * @observable\n   * @api\n   */\n  PluggableMap.prototype.getSize = function getSize () {\n    return (\n      /** @type {import(\"./size.js\").Size|undefined} */ (this.get(MapProperty.SIZE))\n    );\n  };\n\n  /**\n   * Get the view associated with this map. A view manages properties such as\n   * center and resolution.\n   * @return {View} The view that controls this map.\n   * @observable\n   * @api\n   */\n  PluggableMap.prototype.getView = function getView () {\n    return (\n      /** @type {View} */ (this.get(MapProperty.VIEW))\n    );\n  };\n\n  /**\n   * Get the element that serves as the map viewport.\n   * @return {HTMLElement} Viewport.\n   * @api\n   */\n  PluggableMap.prototype.getViewport = function getViewport () {\n    return this.viewport_;\n  };\n\n  /**\n   * Get the element that serves as the container for overlays.  Elements added to\n   * this container will let mousedown and touchstart events through to the map,\n   * so clicks and gestures on an overlay will trigger {@link module:ol/MapBrowserEvent~MapBrowserEvent}\n   * events.\n   * @return {!HTMLElement} The map's overlay container.\n   */\n  PluggableMap.prototype.getOverlayContainer = function getOverlayContainer () {\n    return this.overlayContainer_;\n  };\n\n  /**\n   * Get the element that serves as a container for overlays that don't allow\n   * event propagation. Elements added to this container won't let mousedown and\n   * touchstart events through to the map, so clicks and gestures on an overlay\n   * don't trigger any {@link module:ol/MapBrowserEvent~MapBrowserEvent}.\n   * @return {!HTMLElement} The map's overlay container that stops events.\n   */\n  PluggableMap.prototype.getOverlayContainerStopEvent = function getOverlayContainerStopEvent () {\n    return this.overlayContainerStopEvent_;\n  };\n\n  /**\n   * @param {import(\"./Tile.js\").default} tile Tile.\n   * @param {string} tileSourceKey Tile source key.\n   * @param {import(\"./coordinate.js\").Coordinate} tileCenter Tile center.\n   * @param {number} tileResolution Tile resolution.\n   * @return {number} Tile priority.\n   */\n  PluggableMap.prototype.getTilePriority = function getTilePriority (tile, tileSourceKey, tileCenter, tileResolution) {\n    // Filter out tiles at higher zoom levels than the current zoom level, or that\n    // are outside the visible extent.\n    var frameState = this.frameState_;\n    if (!frameState || !(tileSourceKey in frameState.wantedTiles)) {\n      return DROP;\n    }\n    if (!frameState.wantedTiles[tileSourceKey][tile.getKey()]) {\n      return DROP;\n    }\n    // Prioritize the highest zoom level tiles closest to the focus.\n    // Tiles at higher zoom levels are prioritized using Math.log(tileResolution).\n    // Within a zoom level, tiles are prioritized by the distance in pixels\n    // between the center of the tile and the focus.  The factor of 65536 means\n    // that the prioritization should behave as desired for tiles up to\n    // 65536 * Math.log(2) = 45426 pixels from the focus.\n    var deltaX = tileCenter[0] - frameState.focus[0];\n    var deltaY = tileCenter[1] - frameState.focus[1];\n    return 65536 * Math.log(tileResolution) +\n        Math.sqrt(deltaX * deltaX + deltaY * deltaY) / tileResolution;\n  };\n\n  /**\n   * @param {Event} browserEvent Browser event.\n   * @param {string=} opt_type Type.\n   */\n  PluggableMap.prototype.handleBrowserEvent = function handleBrowserEvent (browserEvent, opt_type) {\n    var type = opt_type || browserEvent.type;\n    var mapBrowserEvent = new MapBrowserEvent(type, this, browserEvent);\n    this.handleMapBrowserEvent(mapBrowserEvent);\n  };\n\n  /**\n   * @param {MapBrowserEvent} mapBrowserEvent The event to handle.\n   */\n  PluggableMap.prototype.handleMapBrowserEvent = function handleMapBrowserEvent (mapBrowserEvent) {\n    if (!this.frameState_) {\n      // With no view defined, we cannot translate pixels into geographical\n      // coordinates so interactions cannot be used.\n      return;\n    }\n    this.focus_ = mapBrowserEvent.coordinate;\n    mapBrowserEvent.frameState = this.frameState_;\n    var interactionsArray = this.getInteractions().getArray();\n    if (this.dispatchEvent(mapBrowserEvent) !== false) {\n      for (var i = interactionsArray.length - 1; i >= 0; i--) {\n        var interaction = interactionsArray[i];\n        if (!interaction.getActive()) {\n          continue;\n        }\n        var cont = interaction.handleEvent(mapBrowserEvent);\n        if (!cont) {\n          break;\n        }\n      }\n    }\n  };\n\n  /**\n   * @protected\n   */\n  PluggableMap.prototype.handlePostRender = function handlePostRender () {\n\n    var frameState = this.frameState_;\n\n    // Manage the tile queue\n    // Image loads are expensive and a limited resource, so try to use them\n    // efficiently:\n    // * When the view is static we allow a large number of parallel tile loads\n    //   to complete the frame as quickly as possible.\n    // * When animating or interacting, image loads can cause janks, so we reduce\n    //   the maximum number of loads per frame and limit the number of parallel\n    //   tile loads to remain reactive to view changes and to reduce the chance of\n    //   loading tiles that will quickly disappear from view.\n    var tileQueue = this.tileQueue_;\n    if (!tileQueue.isEmpty()) {\n      var maxTotalLoading = this.maxTilesLoading_;\n      var maxNewLoads = maxTotalLoading;\n      if (frameState) {\n        var hints = frameState.viewHints;\n        if (hints[ViewHint.ANIMATING]) {\n          maxTotalLoading = this.loadTilesWhileAnimating_ ? 8 : 0;\n          maxNewLoads = 2;\n        }\n        if (hints[ViewHint.INTERACTING]) {\n          maxTotalLoading = this.loadTilesWhileInteracting_ ? 8 : 0;\n          maxNewLoads = 2;\n        }\n      }\n      if (tileQueue.getTilesLoading() < maxTotalLoading) {\n        tileQueue.reprioritize(); // FIXME only call if view has changed\n        tileQueue.loadMoreTiles(maxTotalLoading, maxNewLoads);\n      }\n    }\n    if (frameState && this.hasListener(RenderEventType.RENDERCOMPLETE) && !frameState.animate &&\n        !this.tileQueue_.getTilesLoading() && !getLoading(this.getLayers().getArray())) {\n      this.renderer_.dispatchRenderEvent(RenderEventType.RENDERCOMPLETE, frameState);\n    }\n\n    var postRenderFunctions = this.postRenderFunctions_;\n    for (var i = 0, ii = postRenderFunctions.length; i < ii; ++i) {\n      postRenderFunctions[i](this, frameState);\n    }\n    postRenderFunctions.length = 0;\n  };\n\n  /**\n   * @private\n   */\n  PluggableMap.prototype.handleSizeChanged_ = function handleSizeChanged_ () {\n    this.render();\n  };\n\n  /**\n   * @private\n   */\n  PluggableMap.prototype.handleTargetChanged_ = function handleTargetChanged_ () {\n    // target may be undefined, null, a string or an Element.\n    // If it's a string we convert it to an Element before proceeding.\n    // If it's not now an Element we remove the viewport from the DOM.\n    // If it's an Element we append the viewport element to it.\n\n    var targetElement;\n    if (this.getTarget()) {\n      targetElement = this.getTargetElement();\n    }\n\n    if (this.keyHandlerKeys_) {\n      for (var i = 0, ii = this.keyHandlerKeys_.length; i < ii; ++i) {\n        unlistenByKey(this.keyHandlerKeys_[i]);\n      }\n      this.keyHandlerKeys_ = null;\n    }\n\n    if (!targetElement) {\n      this.renderer_.removeLayerRenderers();\n      removeNode(this.viewport_);\n      if (this.handleResize_ !== undefined) {\n        removeEventListener(EventType.RESIZE, this.handleResize_, false);\n        this.handleResize_ = undefined;\n      }\n    } else {\n      targetElement.appendChild(this.viewport_);\n\n      var keyboardEventTarget = !this.keyboardEventTarget_ ?\n        targetElement : this.keyboardEventTarget_;\n      this.keyHandlerKeys_ = [\n        listen(keyboardEventTarget, EventType.KEYDOWN, this.handleBrowserEvent, this),\n        listen(keyboardEventTarget, EventType.KEYPRESS, this.handleBrowserEvent, this)\n      ];\n\n      if (!this.handleResize_) {\n        this.handleResize_ = this.updateSize.bind(this);\n        window.addEventListener(EventType.RESIZE, this.handleResize_, false);\n      }\n    }\n\n    this.updateSize();\n    // updateSize calls setSize, so no need to call this.render\n    // ourselves here.\n  };\n\n  /**\n   * @private\n   */\n  PluggableMap.prototype.handleTileChange_ = function handleTileChange_ () {\n    this.render();\n  };\n\n  /**\n   * @private\n   */\n  PluggableMap.prototype.handleViewPropertyChanged_ = function handleViewPropertyChanged_ () {\n    this.render();\n  };\n\n  /**\n   * @private\n   */\n  PluggableMap.prototype.handleViewChanged_ = function handleViewChanged_ () {\n    if (this.viewPropertyListenerKey_) {\n      unlistenByKey(this.viewPropertyListenerKey_);\n      this.viewPropertyListenerKey_ = null;\n    }\n    if (this.viewChangeListenerKey_) {\n      unlistenByKey(this.viewChangeListenerKey_);\n      this.viewChangeListenerKey_ = null;\n    }\n    var view = this.getView();\n    if (view) {\n      this.viewport_.setAttribute('data-view', getUid(view));\n      this.viewPropertyListenerKey_ = listen(\n        view, ObjectEventType.PROPERTYCHANGE,\n        this.handleViewPropertyChanged_, this);\n      this.viewChangeListenerKey_ = listen(\n        view, EventType.CHANGE,\n        this.handleViewPropertyChanged_, this);\n    }\n    this.render();\n  };\n\n  /**\n   * @private\n   */\n  PluggableMap.prototype.handleLayerGroupChanged_ = function handleLayerGroupChanged_ () {\n    if (this.layerGroupPropertyListenerKeys_) {\n      this.layerGroupPropertyListenerKeys_.forEach(unlistenByKey);\n      this.layerGroupPropertyListenerKeys_ = null;\n    }\n    var layerGroup = this.getLayerGroup();\n    if (layerGroup) {\n      this.layerGroupPropertyListenerKeys_ = [\n        listen(\n          layerGroup, ObjectEventType.PROPERTYCHANGE,\n          this.render, this),\n        listen(\n          layerGroup, EventType.CHANGE,\n          this.render, this)\n      ];\n    }\n    this.render();\n  };\n\n  /**\n   * @return {boolean} Is rendered.\n   */\n  PluggableMap.prototype.isRendered = function isRendered () {\n    return !!this.frameState_;\n  };\n\n  /**\n   * Requests an immediate render in a synchronous manner.\n   * @api\n   */\n  PluggableMap.prototype.renderSync = function renderSync () {\n    if (this.animationDelayKey_) {\n      cancelAnimationFrame(this.animationDelayKey_);\n    }\n    this.animationDelay_();\n  };\n\n  /**\n   * Request a map rendering (at the next animation frame).\n   * @api\n   */\n  PluggableMap.prototype.render = function render () {\n    if (this.animationDelayKey_ === undefined) {\n      this.animationDelayKey_ = requestAnimationFrame(this.animationDelay_);\n    }\n  };\n\n  /**\n   * Remove the given control from the map.\n   * @param {import(\"./control/Control.js\").default} control Control.\n   * @return {import(\"./control/Control.js\").default|undefined} The removed control (or undefined\n   *     if the control was not found).\n   * @api\n   */\n  PluggableMap.prototype.removeControl = function removeControl (control) {\n    return this.getControls().remove(control);\n  };\n\n  /**\n   * Remove the given interaction from the map.\n   * @param {import(\"./interaction/Interaction.js\").default} interaction Interaction to remove.\n   * @return {import(\"./interaction/Interaction.js\").default|undefined} The removed interaction (or\n   *     undefined if the interaction was not found).\n   * @api\n   */\n  PluggableMap.prototype.removeInteraction = function removeInteraction (interaction) {\n    return this.getInteractions().remove(interaction);\n  };\n\n  /**\n   * Removes the given layer from the map.\n   * @param {import(\"./layer/Base.js\").default} layer Layer.\n   * @return {import(\"./layer/Base.js\").default|undefined} The removed layer (or undefined if the\n   *     layer was not found).\n   * @api\n   */\n  PluggableMap.prototype.removeLayer = function removeLayer (layer) {\n    var layers = this.getLayerGroup().getLayers();\n    return layers.remove(layer);\n  };\n\n  /**\n   * Remove the given overlay from the map.\n   * @param {import(\"./Overlay.js\").default} overlay Overlay.\n   * @return {import(\"./Overlay.js\").default|undefined} The removed overlay (or undefined\n   *     if the overlay was not found).\n   * @api\n   */\n  PluggableMap.prototype.removeOverlay = function removeOverlay (overlay) {\n    return this.getOverlays().remove(overlay);\n  };\n\n  /**\n   * @param {number} time Time.\n   * @private\n   */\n  PluggableMap.prototype.renderFrame_ = function renderFrame_ (time) {\n    var viewState;\n\n    var size = this.getSize();\n    var view = this.getView();\n    var extent = createEmpty();\n    var previousFrameState = this.frameState_;\n    /** @type {?FrameState} */\n    var frameState = null;\n    if (size !== undefined && hasArea(size) && view && view.isDef()) {\n      var viewHints = view.getHints(this.frameState_ ? this.frameState_.viewHints : undefined);\n      var layerStatesArray = this.getLayerGroup().getLayerStatesArray();\n      var layerStates = {};\n      for (var i = 0, ii = layerStatesArray.length; i < ii; ++i) {\n        layerStates[getUid(layerStatesArray[i].layer)] = layerStatesArray[i];\n      }\n      viewState = view.getState(this.pixelRatio_);\n      frameState = /** @type {FrameState} */ ({\n        animate: false,\n        coordinateToPixelTransform: this.coordinateToPixelTransform_,\n        extent: extent,\n        focus: this.focus_ ? this.focus_ : viewState.center,\n        index: this.frameIndex_++,\n        layerStates: layerStates,\n        layerStatesArray: layerStatesArray,\n        pixelRatio: this.pixelRatio_,\n        pixelToCoordinateTransform: this.pixelToCoordinateTransform_,\n        postRenderFunctions: [],\n        size: size,\n        skippedFeatureUids: this.skippedFeatureUids_,\n        tileQueue: this.tileQueue_,\n        time: time,\n        usedTiles: {},\n        viewState: viewState,\n        viewHints: viewHints,\n        wantedTiles: {}\n      });\n    }\n\n    if (frameState) {\n      frameState.extent = getForViewAndSize(viewState.center,\n        viewState.resolution, viewState.rotation, frameState.size, extent);\n    }\n\n    this.frameState_ = frameState;\n    this.renderer_.renderFrame(frameState);\n\n    if (frameState) {\n      if (frameState.animate) {\n        this.render();\n      }\n      Array.prototype.push.apply(this.postRenderFunctions_, frameState.postRenderFunctions);\n\n      if (previousFrameState) {\n        var moveStart = !this.previousExtent_ ||\n                    (!isEmpty(this.previousExtent_) &&\n                    !equals(frameState.extent, this.previousExtent_));\n        if (moveStart) {\n          this.dispatchEvent(\n            new MapEvent(MapEventType.MOVESTART, this, previousFrameState));\n          this.previousExtent_ = createOrUpdateEmpty(this.previousExtent_);\n        }\n      }\n\n      var idle = this.previousExtent_ &&\n          !frameState.viewHints[ViewHint.ANIMATING] &&\n          !frameState.viewHints[ViewHint.INTERACTING] &&\n          !equals(frameState.extent, this.previousExtent_);\n\n      if (idle) {\n        this.dispatchEvent(new MapEvent(MapEventType.MOVEEND, this, frameState));\n        clone(frameState.extent, this.previousExtent_);\n      }\n    }\n\n    this.dispatchEvent(new MapEvent(MapEventType.POSTRENDER, this, frameState));\n\n    setTimeout(this.handlePostRender.bind(this), 0);\n\n  };\n\n  /**\n   * Sets the layergroup of this map.\n   * @param {LayerGroup} layerGroup A layer group containing the layers in this map.\n   * @observable\n   * @api\n   */\n  PluggableMap.prototype.setLayerGroup = function setLayerGroup (layerGroup) {\n    this.set(MapProperty.LAYERGROUP, layerGroup);\n  };\n\n  /**\n   * Set the size of this map.\n   * @param {import(\"./size.js\").Size|undefined} size The size in pixels of the map in the DOM.\n   * @observable\n   * @api\n   */\n  PluggableMap.prototype.setSize = function setSize (size) {\n    this.set(MapProperty.SIZE, size);\n  };\n\n  /**\n   * Set the target element to render this map into.\n   * @param {HTMLElement|string|undefined} target The Element or id of the Element\n   *     that the map is rendered in.\n   * @observable\n   * @api\n   */\n  PluggableMap.prototype.setTarget = function setTarget (target) {\n    this.set(MapProperty.TARGET, target);\n  };\n\n  /**\n   * Set the view for this map.\n   * @param {View} view The view that controls this map.\n   * @observable\n   * @api\n   */\n  PluggableMap.prototype.setView = function setView (view) {\n    this.set(MapProperty.VIEW, view);\n  };\n\n  /**\n   * @param {import(\"./Feature.js\").default} feature Feature.\n   */\n  PluggableMap.prototype.skipFeature = function skipFeature (feature) {\n    this.skippedFeatureUids_[getUid(feature)] = true;\n    this.render();\n  };\n\n  /**\n   * Force a recalculation of the map viewport size.  This should be called when\n   * third-party code changes the size of the map viewport.\n   * @api\n   */\n  PluggableMap.prototype.updateSize = function updateSize () {\n    var targetElement = this.getTargetElement();\n\n    if (!targetElement) {\n      this.setSize(undefined);\n    } else {\n      var computedStyle = getComputedStyle(targetElement);\n      this.setSize([\n        targetElement.offsetWidth -\n            parseFloat(computedStyle['borderLeftWidth']) -\n            parseFloat(computedStyle['paddingLeft']) -\n            parseFloat(computedStyle['paddingRight']) -\n            parseFloat(computedStyle['borderRightWidth']),\n        targetElement.offsetHeight -\n            parseFloat(computedStyle['borderTopWidth']) -\n            parseFloat(computedStyle['paddingTop']) -\n            parseFloat(computedStyle['paddingBottom']) -\n            parseFloat(computedStyle['borderBottomWidth'])\n      ]);\n    }\n  };\n\n  /**\n   * @param {import(\"./Feature.js\").default} feature Feature.\n   */\n  PluggableMap.prototype.unskipFeature = function unskipFeature (feature) {\n    delete this.skippedFeatureUids_[getUid(feature)];\n    this.render();\n  };\n\n  return PluggableMap;\n}(BaseObject));\n\n\n/**\n * @param {MapOptions} options Map options.\n * @return {MapOptionsInternal} Internal map options.\n */\nfunction createOptionsInternal(options) {\n\n  /**\n   * @type {HTMLElement|Document}\n   */\n  var keyboardEventTarget = null;\n  if (options.keyboardEventTarget !== undefined) {\n    keyboardEventTarget = typeof options.keyboardEventTarget === 'string' ?\n      document.getElementById(options.keyboardEventTarget) :\n      options.keyboardEventTarget;\n  }\n\n  /**\n   * @type {Object<string, *>}\n   */\n  var values = {};\n\n  var layerGroup = options.layers && typeof /** @type {?} */ (options.layers).getLayers === 'function' ?\n    /** @type {LayerGroup} */ (options.layers) : new LayerGroup({layers: /** @type {Collection} */ (options.layers)});\n  values[MapProperty.LAYERGROUP] = layerGroup;\n\n  values[MapProperty.TARGET] = options.target;\n\n  values[MapProperty.VIEW] = options.view !== undefined ?\n    options.view : new View();\n\n  var controls;\n  if (options.controls !== undefined) {\n    if (Array.isArray(options.controls)) {\n      controls = new Collection(options.controls.slice());\n    } else {\n      assert(typeof /** @type {?} */ (options.controls).getArray === 'function',\n        47); // Expected `controls` to be an array or an `import(\"./Collection.js\").Collection`\n      controls = /** @type {Collection} */ (options.controls);\n    }\n  }\n\n  var interactions;\n  if (options.interactions !== undefined) {\n    if (Array.isArray(options.interactions)) {\n      interactions = new Collection(options.interactions.slice());\n    } else {\n      assert(typeof /** @type {?} */ (options.interactions).getArray === 'function',\n        48); // Expected `interactions` to be an array or an `import(\"./Collection.js\").Collection`\n      interactions = /** @type {Collection} */ (options.interactions);\n    }\n  }\n\n  var overlays;\n  if (options.overlays !== undefined) {\n    if (Array.isArray(options.overlays)) {\n      overlays = new Collection(options.overlays.slice());\n    } else {\n      assert(typeof /** @type {?} */ (options.overlays).getArray === 'function',\n        49); // Expected `overlays` to be an array or an `import(\"./Collection.js\").Collection`\n      overlays = options.overlays;\n    }\n  } else {\n    overlays = new Collection();\n  }\n\n  return {\n    controls: controls,\n    interactions: interactions,\n    keyboardEventTarget: keyboardEventTarget,\n    overlays: overlays,\n    values: values\n  };\n\n}\nexport default PluggableMap;\n\n/**\n * @param  {Array<import(\"./layer/Base.js\").default>} layers Layers.\n * @return {boolean} Layers have sources that are still loading.\n */\nfunction getLoading(layers) {\n  for (var i = 0, ii = layers.length; i < ii; ++i) {\n    var layer = layers[i];\n    if (typeof /** @type {?} */ (layer).getLayers === 'function') {\n      return getLoading(/** @type {LayerGroup} */ (layer).getLayers().getArray());\n    } else {\n      var source = /** @type {import(\"./layer/Layer.js\").default} */ (\n        layer).getSource();\n      if (source && source.loading) {\n        return true;\n      }\n    }\n  }\n  return false;\n}\n\n//# sourceMappingURL=PluggableMap.js.map","/**\n * @module ol/css\n */\n\n\n/**\n * The CSS class for hidden feature.\n *\n * @const\n * @type {string}\n */\nexport var CLASS_HIDDEN = 'ol-hidden';\n\n\n/**\n * The CSS class that we'll give the DOM elements to have them selectable.\n *\n * @const\n * @type {string}\n */\nexport var CLASS_SELECTABLE = 'ol-selectable';\n\n\n/**\n * The CSS class that we'll give the DOM elements to have them unselectable.\n *\n * @const\n * @type {string}\n */\nexport var CLASS_UNSELECTABLE = 'ol-unselectable';\n\n\n/**\n * The CSS class for unsupported feature.\n *\n * @const\n * @type {string}\n */\nexport var CLASS_UNSUPPORTED = 'ol-unsupported';\n\n\n/**\n * The CSS class for controls.\n *\n * @const\n * @type {string}\n */\nexport var CLASS_CONTROL = 'ol-control';\n\n\n/**\n * The CSS class that we'll give the DOM elements that are collapsed, i.e.\n * to those elements which usually can be expanded.\n *\n * @const\n * @type {string}\n */\nexport var CLASS_COLLAPSED = 'ol-collapsed';\n\n\n/**\n * Get the list of font families from a font spec.  Note that this doesn't work\n * for font families that have commas in them.\n * @param {string} The CSS font property.\n * @return {Object<string>} The font families (or null if the input spec is invalid).\n */\nexport var getFontFamilies = (function() {\n  var style;\n  var cache = {};\n  return function(font) {\n    if (!style) {\n      style = document.createElement('div').style;\n    }\n    if (!(font in cache)) {\n      style.font = font;\n      var family = style.fontFamily;\n      style.font = '';\n      if (!family) {\n        return null;\n      }\n      cache[font] = family.split(/,\\s?/);\n    }\n    return cache[font];\n  };\n})();\n\n//# sourceMappingURL=css.js.map","/**\n * @module ol/layer/Layer\n */\nimport {listen, unlistenByKey} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {getUid} from '../util.js';\nimport {getChangeEventType} from '../Object.js';\nimport BaseLayer from './Base.js';\nimport LayerProperty from './Property.js';\nimport {assign} from '../obj.js';\nimport RenderEventType from '../render/EventType.js';\nimport SourceState from '../source/State.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {import(\"../source/Source.js\").default} [source] Source for this layer.  If not provided to the constructor,\n * the source can be set by calling {@link module:ol/layer/Layer#setSource layer.setSource(source)} after\n * construction.\n * @property {import(\"../PluggableMap.js\").default} [map] Map.\n */\n\n\n/**\n * @typedef {Object} State\n * @property {import(\"./Base.js\").default} layer\n * @property {number} opacity\n * @property {SourceState} sourceState\n * @property {boolean} visible\n * @property {boolean} managed\n * @property {import(\"../extent.js\").Extent} [extent]\n * @property {number} zIndex\n * @property {number} maxResolution\n * @property {number} minResolution\n */\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * A visual representation of raster or vector map data.\n * Layers group together those properties that pertain to how the data is to be\n * displayed, irrespective of the source of that data.\n *\n * Layers are usually added to a map with {@link module:ol/Map#addLayer}. Components\n * like {@link module:ol/interaction/Select~Select} use unmanaged layers\n * internally. These unmanaged layers are associated with the map using\n * {@link module:ol/layer/Layer~Layer#setMap} instead.\n *\n * A generic `change` event is fired when the state of the source changes.\n *\n * @fires import(\"../render/Event.js\").RenderEvent\n */\nvar Layer = /*@__PURE__*/(function (BaseLayer) {\n  function Layer(options) {\n\n    var baseOptions = assign({}, options);\n    delete baseOptions.source;\n\n    BaseLayer.call(this, baseOptions);\n\n    /**\n     * @private\n     * @type {?import(\"../events.js\").EventsKey}\n     */\n    this.mapPrecomposeKey_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../events.js\").EventsKey}\n     */\n    this.mapRenderKey_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../events.js\").EventsKey}\n     */\n    this.sourceChangeKey_ = null;\n\n    if (options.map) {\n      this.setMap(options.map);\n    }\n\n    listen(this,\n      getChangeEventType(LayerProperty.SOURCE),\n      this.handleSourcePropertyChange_, this);\n\n    var source = options.source ? options.source : null;\n    this.setSource(source);\n  }\n\n  if ( BaseLayer ) Layer.__proto__ = BaseLayer;\n  Layer.prototype = Object.create( BaseLayer && BaseLayer.prototype );\n  Layer.prototype.constructor = Layer;\n\n  /**\n   * @inheritDoc\n   */\n  Layer.prototype.getLayersArray = function getLayersArray (opt_array) {\n    var array = opt_array ? opt_array : [];\n    array.push(this);\n    return array;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  Layer.prototype.getLayerStatesArray = function getLayerStatesArray (opt_states) {\n    var states = opt_states ? opt_states : [];\n    states.push(this.getLayerState());\n    return states;\n  };\n\n  /**\n   * Get the layer source.\n   * @return {import(\"../source/Source.js\").default} The layer source (or `null` if not yet set).\n   * @observable\n   * @api\n   */\n  Layer.prototype.getSource = function getSource () {\n    var source = this.get(LayerProperty.SOURCE);\n    return (\n      /** @type {import(\"../source/Source.js\").default} */ (source) || null\n    );\n  };\n\n  /**\n    * @inheritDoc\n    */\n  Layer.prototype.getSourceState = function getSourceState () {\n    var source = this.getSource();\n    return !source ? SourceState.UNDEFINED : source.getState();\n  };\n\n  /**\n   * @private\n   */\n  Layer.prototype.handleSourceChange_ = function handleSourceChange_ () {\n    this.changed();\n  };\n\n  /**\n   * @private\n   */\n  Layer.prototype.handleSourcePropertyChange_ = function handleSourcePropertyChange_ () {\n    if (this.sourceChangeKey_) {\n      unlistenByKey(this.sourceChangeKey_);\n      this.sourceChangeKey_ = null;\n    }\n    var source = this.getSource();\n    if (source) {\n      this.sourceChangeKey_ = listen(source,\n        EventType.CHANGE, this.handleSourceChange_, this);\n    }\n    this.changed();\n  };\n\n  /**\n   * Sets the layer to be rendered on top of other layers on a map. The map will\n   * not manage this layer in its layers collection, and the callback in\n   * {@link module:ol/Map#forEachLayerAtPixel} will receive `null` as layer. This\n   * is useful for temporary layers. To remove an unmanaged layer from the map,\n   * use `#setMap(null)`.\n   *\n   * To add the layer to a map and have it managed by the map, use\n   * {@link module:ol/Map#addLayer} instead.\n   * @param {import(\"../PluggableMap.js\").default} map Map.\n   * @api\n   */\n  Layer.prototype.setMap = function setMap (map) {\n    if (this.mapPrecomposeKey_) {\n      unlistenByKey(this.mapPrecomposeKey_);\n      this.mapPrecomposeKey_ = null;\n    }\n    if (!map) {\n      this.changed();\n    }\n    if (this.mapRenderKey_) {\n      unlistenByKey(this.mapRenderKey_);\n      this.mapRenderKey_ = null;\n    }\n    if (map) {\n      this.mapPrecomposeKey_ = listen(map, RenderEventType.PRECOMPOSE, function(evt) {\n        var renderEvent = /** @type {import(\"../render/Event.js\").default} */ (evt);\n        var layerState = this.getLayerState();\n        layerState.managed = false;\n        if (this.getZIndex() === undefined) {\n          layerState.zIndex = Infinity;\n        }\n        renderEvent.frameState.layerStatesArray.push(layerState);\n        renderEvent.frameState.layerStates[getUid(this)] = layerState;\n      }, this);\n      this.mapRenderKey_ = listen(this, EventType.CHANGE, map.render, map);\n      this.changed();\n    }\n  };\n\n  /**\n   * Set the layer source.\n   * @param {import(\"../source/Source.js\").default} source The layer source.\n   * @observable\n   * @api\n   */\n  Layer.prototype.setSource = function setSource (source) {\n    this.set(LayerProperty.SOURCE, source);\n  };\n\n  return Layer;\n}(BaseLayer));\n\n\n/**\n * Return `true` if the layer is visible, and if the passed resolution is\n * between the layer's minResolution and maxResolution. The comparison is\n * inclusive for `minResolution` and exclusive for `maxResolution`.\n * @param {State} layerState Layer state.\n * @param {number} resolution Resolution.\n * @return {boolean} The layer is visible at the given resolution.\n */\nexport function visibleAtResolution(layerState, resolution) {\n  return layerState.visible && resolution >= layerState.minResolution &&\n      resolution < layerState.maxResolution;\n}\n\n\nexport default Layer;\n\n//# sourceMappingURL=Layer.js.map","/**\n * @module ol/control/Attribution\n */\nimport {equals} from '../array.js';\nimport Control from './Control.js';\nimport {CLASS_CONTROL, CLASS_UNSELECTABLE, CLASS_COLLAPSED} from '../css.js';\nimport {removeChildren, replaceNode} from '../dom.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {visibleAtResolution} from '../layer/Layer.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-attribution'] CSS class name.\n * @property {HTMLElement|string} [target] Specify a target if you\n * want the control to be rendered outside of the map's\n * viewport.\n * @property {boolean} [collapsible] Specify if attributions can\n * be collapsed. If not specified, sources control this behavior with their\n * `attributionsCollapsible` setting.\n * @property {boolean} [collapsed=true] Specify if attributions should\n * be collapsed at startup.\n * @property {string} [tipLabel='Attributions'] Text label to use for the button tip.\n * @property {string} [label='i'] Text label to use for the\n * collapsed attributions button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string|HTMLElement} [collapseLabel='»'] Text label to use\n * for the expanded attributions button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {function(import(\"../MapEvent.js\").default)} [render] Function called when\n * the control should be re-rendered. This is called in a `requestAnimationFrame`\n * callback.\n */\n\n\n/**\n * @classdesc\n * Control to show all the attributions associated with the layer sources\n * in the map. This control is one of the default controls included in maps.\n * By default it will show in the bottom right portion of the map, but this can\n * be changed by using a css selector for `.ol-attribution`.\n *\n * @api\n */\nvar Attribution = /*@__PURE__*/(function (Control) {\n  function Attribution(opt_options) {\n\n    var options = opt_options ? opt_options : {};\n\n    Control.call(this, {\n      element: document.createElement('div'),\n      render: options.render || render,\n      target: options.target\n    });\n\n    /**\n     * @private\n     * @type {HTMLElement}\n     */\n    this.ulElement_ = document.createElement('ul');\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.collapsed_ = options.collapsed !== undefined ? options.collapsed : true;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.overrideCollapsible_ = options.collapsible !== undefined;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.collapsible_ = options.collapsible !== undefined ?\n      options.collapsible : true;\n\n    if (!this.collapsible_) {\n      this.collapsed_ = false;\n    }\n\n    var className = options.className !== undefined ? options.className : 'ol-attribution';\n\n    var tipLabel = options.tipLabel !== undefined ? options.tipLabel : 'Attributions';\n\n    var collapseLabel = options.collapseLabel !== undefined ? options.collapseLabel : '\\u00BB';\n\n    if (typeof collapseLabel === 'string') {\n      /**\n       * @private\n       * @type {HTMLElement}\n       */\n      this.collapseLabel_ = document.createElement('span');\n      this.collapseLabel_.textContent = collapseLabel;\n    } else {\n      this.collapseLabel_ = collapseLabel;\n    }\n\n    var label = options.label !== undefined ? options.label : 'i';\n\n    if (typeof label === 'string') {\n      /**\n       * @private\n       * @type {HTMLElement}\n       */\n      this.label_ = document.createElement('span');\n      this.label_.textContent = label;\n    } else {\n      this.label_ = label;\n    }\n\n\n    var activeLabel = (this.collapsible_ && !this.collapsed_) ?\n      this.collapseLabel_ : this.label_;\n    var button = document.createElement('button');\n    button.setAttribute('type', 'button');\n    button.title = tipLabel;\n    button.appendChild(activeLabel);\n\n    listen(button, EventType.CLICK, this.handleClick_, this);\n\n    var cssClasses = className + ' ' + CLASS_UNSELECTABLE + ' ' + CLASS_CONTROL +\n        (this.collapsed_ && this.collapsible_ ? ' ' + CLASS_COLLAPSED : '') +\n        (this.collapsible_ ? '' : ' ol-uncollapsible');\n    var element = this.element;\n    element.className = cssClasses;\n    element.appendChild(this.ulElement_);\n    element.appendChild(button);\n\n    /**\n     * A list of currently rendered resolutions.\n     * @type {Array<string>}\n     * @private\n     */\n    this.renderedAttributions_ = [];\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.renderedVisible_ = true;\n\n  }\n\n  if ( Control ) Attribution.__proto__ = Control;\n  Attribution.prototype = Object.create( Control && Control.prototype );\n  Attribution.prototype.constructor = Attribution;\n\n  /**\n   * Collect a list of visible attributions and set the collapsible state.\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   * @return {Array<string>} Attributions.\n   * @private\n   */\n  Attribution.prototype.collectSourceAttributions_ = function collectSourceAttributions_ (frameState) {\n    /**\n     * Used to determine if an attribution already exists.\n     * @type {!Object<string, boolean>}\n     */\n    var lookup = {};\n\n    /**\n     * A list of visible attributions.\n     * @type {Array<string>}\n     */\n    var visibleAttributions = [];\n\n    var layerStatesArray = frameState.layerStatesArray;\n    var resolution = frameState.viewState.resolution;\n    for (var i = 0, ii = layerStatesArray.length; i < ii; ++i) {\n      var layerState = layerStatesArray[i];\n      if (!visibleAtResolution(layerState, resolution)) {\n        continue;\n      }\n\n      var source = /** @type {import(\"../layer/Layer.js\").default} */ (layerState.layer).getSource();\n      if (!source) {\n        continue;\n      }\n\n      var attributionGetter = source.getAttributions();\n      if (!attributionGetter) {\n        continue;\n      }\n\n      var attributions = attributionGetter(frameState);\n      if (!attributions) {\n        continue;\n      }\n\n      if (!this.overrideCollapsible_ && source.getAttributionsCollapsible() === false) {\n        this.setCollapsible(false);\n      }\n\n      if (Array.isArray(attributions)) {\n        for (var j = 0, jj = attributions.length; j < jj; ++j) {\n          if (!(attributions[j] in lookup)) {\n            visibleAttributions.push(attributions[j]);\n            lookup[attributions[j]] = true;\n          }\n        }\n      } else {\n        if (!(attributions in lookup)) {\n          visibleAttributions.push(attributions);\n          lookup[attributions] = true;\n        }\n      }\n    }\n    return visibleAttributions;\n  };\n\n  /**\n   * @private\n   * @param {?import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   */\n  Attribution.prototype.updateElement_ = function updateElement_ (frameState) {\n    if (!frameState) {\n      if (this.renderedVisible_) {\n        this.element.style.display = 'none';\n        this.renderedVisible_ = false;\n      }\n      return;\n    }\n\n    var attributions = this.collectSourceAttributions_(frameState);\n\n    var visible = attributions.length > 0;\n    if (this.renderedVisible_ != visible) {\n      this.element.style.display = visible ? '' : 'none';\n      this.renderedVisible_ = visible;\n    }\n\n    if (equals(attributions, this.renderedAttributions_)) {\n      return;\n    }\n\n    removeChildren(this.ulElement_);\n\n    // append the attributions\n    for (var i = 0, ii = attributions.length; i < ii; ++i) {\n      var element = document.createElement('li');\n      element.innerHTML = attributions[i];\n      this.ulElement_.appendChild(element);\n    }\n\n    this.renderedAttributions_ = attributions;\n  };\n\n  /**\n   * @param {MouseEvent} event The event to handle\n   * @private\n   */\n  Attribution.prototype.handleClick_ = function handleClick_ (event) {\n    event.preventDefault();\n    this.handleToggle_();\n  };\n\n  /**\n   * @private\n   */\n  Attribution.prototype.handleToggle_ = function handleToggle_ () {\n    this.element.classList.toggle(CLASS_COLLAPSED);\n    if (this.collapsed_) {\n      replaceNode(this.collapseLabel_, this.label_);\n    } else {\n      replaceNode(this.label_, this.collapseLabel_);\n    }\n    this.collapsed_ = !this.collapsed_;\n  };\n\n  /**\n   * Return `true` if the attribution is collapsible, `false` otherwise.\n   * @return {boolean} True if the widget is collapsible.\n   * @api\n   */\n  Attribution.prototype.getCollapsible = function getCollapsible () {\n    return this.collapsible_;\n  };\n\n  /**\n   * Set whether the attribution should be collapsible.\n   * @param {boolean} collapsible True if the widget is collapsible.\n   * @api\n   */\n  Attribution.prototype.setCollapsible = function setCollapsible (collapsible) {\n    if (this.collapsible_ === collapsible) {\n      return;\n    }\n    this.collapsible_ = collapsible;\n    this.element.classList.toggle('ol-uncollapsible');\n    if (!collapsible && this.collapsed_) {\n      this.handleToggle_();\n    }\n  };\n\n  /**\n   * Collapse or expand the attribution according to the passed parameter. Will\n   * not do anything if the attribution isn't collapsible or if the current\n   * collapsed state is already the one requested.\n   * @param {boolean} collapsed True if the widget is collapsed.\n   * @api\n   */\n  Attribution.prototype.setCollapsed = function setCollapsed (collapsed) {\n    if (!this.collapsible_ || this.collapsed_ === collapsed) {\n      return;\n    }\n    this.handleToggle_();\n  };\n\n  /**\n   * Return `true` when the attribution is currently collapsed or `false`\n   * otherwise.\n   * @return {boolean} True if the widget is collapsed.\n   * @api\n   */\n  Attribution.prototype.getCollapsed = function getCollapsed () {\n    return this.collapsed_;\n  };\n\n  return Attribution;\n}(Control));\n\n\n/**\n * Update the attribution element.\n * @param {import(\"../MapEvent.js\").default} mapEvent Map event.\n * @this {Attribution}\n * @api\n */\nexport function render(mapEvent) {\n  this.updateElement_(mapEvent.frameState);\n}\n\n\nexport default Attribution;\n\n//# sourceMappingURL=Attribution.js.map","/**\n * @module ol/control/Rotate\n */\nimport Control from './Control.js';\nimport {CLASS_CONTROL, CLASS_HIDDEN, CLASS_UNSELECTABLE} from '../css.js';\nimport {easeOut} from '../easing.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-rotate'] CSS class name.\n * @property {string|HTMLElement} [label='⇧'] Text label to use for the rotate button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string} [tipLabel='Reset rotation'] Text label to use for the rotate tip.\n * @property {number} [duration=250] Animation duration in milliseconds.\n * @property {boolean} [autoHide=true] Hide the control when rotation is 0.\n * @property {function(import(\"../MapEvent.js\").default)} [render] Function called when the control should\n * be re-rendered. This is called in a `requestAnimationFrame` callback.\n * @property {function()} [resetNorth] Function called when the control is clicked.\n * This will override the default `resetNorth`.\n * @property {HTMLElement|string} [target] Specify a target if you want the control to be\n * rendered outside of the map's viewport.\n */\n\n\n/**\n * @classdesc\n * A button control to reset rotation to 0.\n * To style this control use css selector `.ol-rotate`. A `.ol-hidden` css\n * selector is added to the button when the rotation is 0.\n *\n * @api\n */\nvar Rotate = /*@__PURE__*/(function (Control) {\n  function Rotate(opt_options) {\n\n    var options = opt_options ? opt_options : {};\n\n    Control.call(this, {\n      element: document.createElement('div'),\n      render: options.render || render,\n      target: options.target\n    });\n\n    var className = options.className !== undefined ? options.className : 'ol-rotate';\n\n    var label = options.label !== undefined ? options.label : '\\u21E7';\n\n    /**\n     * @type {HTMLElement}\n     * @private\n     */\n    this.label_ = null;\n\n    if (typeof label === 'string') {\n      this.label_ = document.createElement('span');\n      this.label_.className = 'ol-compass';\n      this.label_.textContent = label;\n    } else {\n      this.label_ = label;\n      this.label_.classList.add('ol-compass');\n    }\n\n    var tipLabel = options.tipLabel ? options.tipLabel : 'Reset rotation';\n\n    var button = document.createElement('button');\n    button.className = className + '-reset';\n    button.setAttribute('type', 'button');\n    button.title = tipLabel;\n    button.appendChild(this.label_);\n\n    listen(button, EventType.CLICK, this.handleClick_, this);\n\n    var cssClasses = className + ' ' + CLASS_UNSELECTABLE + ' ' + CLASS_CONTROL;\n    var element = this.element;\n    element.className = cssClasses;\n    element.appendChild(button);\n\n    this.callResetNorth_ = options.resetNorth ? options.resetNorth : undefined;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.autoHide_ = options.autoHide !== undefined ? options.autoHide : true;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.rotation_ = undefined;\n\n    if (this.autoHide_) {\n      this.element.classList.add(CLASS_HIDDEN);\n    }\n\n  }\n\n  if ( Control ) Rotate.__proto__ = Control;\n  Rotate.prototype = Object.create( Control && Control.prototype );\n  Rotate.prototype.constructor = Rotate;\n\n  /**\n   * @param {MouseEvent} event The event to handle\n   * @private\n   */\n  Rotate.prototype.handleClick_ = function handleClick_ (event) {\n    event.preventDefault();\n    if (this.callResetNorth_ !== undefined) {\n      this.callResetNorth_();\n    } else {\n      this.resetNorth_();\n    }\n  };\n\n  /**\n   * @private\n   */\n  Rotate.prototype.resetNorth_ = function resetNorth_ () {\n    var map = this.getMap();\n    var view = map.getView();\n    if (!view) {\n      // the map does not have a view, so we can't act\n      // upon it\n      return;\n    }\n    if (view.getRotation() !== undefined) {\n      if (this.duration_ > 0) {\n        view.animate({\n          rotation: 0,\n          duration: this.duration_,\n          easing: easeOut\n        });\n      } else {\n        view.setRotation(0);\n      }\n    }\n  };\n\n  return Rotate;\n}(Control));\n\n\n/**\n * Update the rotate control element.\n * @param {import(\"../MapEvent.js\").default} mapEvent Map event.\n * @this {Rotate}\n * @api\n */\nexport function render(mapEvent) {\n  var frameState = mapEvent.frameState;\n  if (!frameState) {\n    return;\n  }\n  var rotation = frameState.viewState.rotation;\n  if (rotation != this.rotation_) {\n    var transform = 'rotate(' + rotation + 'rad)';\n    if (this.autoHide_) {\n      var contains = this.element.classList.contains(CLASS_HIDDEN);\n      if (!contains && rotation === 0) {\n        this.element.classList.add(CLASS_HIDDEN);\n      } else if (contains && rotation !== 0) {\n        this.element.classList.remove(CLASS_HIDDEN);\n      }\n    }\n    this.label_.style.msTransform = transform;\n    this.label_.style.webkitTransform = transform;\n    this.label_.style.transform = transform;\n  }\n  this.rotation_ = rotation;\n}\n\nexport default Rotate;\n\n//# sourceMappingURL=Rotate.js.map","/**\n * @module ol/control/Zoom\n */\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport Control from './Control.js';\nimport {CLASS_CONTROL, CLASS_UNSELECTABLE} from '../css.js';\nimport {easeOut} from '../easing.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=250] Animation duration in milliseconds.\n * @property {string} [className='ol-zoom'] CSS class name.\n * @property {string|HTMLElement} [zoomInLabel='+'] Text label to use for the zoom-in\n * button. Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string|HTMLElement} [zoomOutLabel='-'] Text label to use for the zoom-out button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string} [zoomInTipLabel='Zoom in'] Text label to use for the button tip.\n * @property {string} [zoomOutTipLabel='Zoom out'] Text label to use for the button tip.\n * @property {number} [delta=1] The zoom delta applied on each click.\n * @property {HTMLElement|string} [target] Specify a target if you want the control to be\n * rendered outside of the map's viewport.\n */\n\n\n/**\n * @classdesc\n * A control with 2 buttons, one for zoom in and one for zoom out.\n * This control is one of the default controls of a map. To style this control\n * use css selectors `.ol-zoom-in` and `.ol-zoom-out`.\n *\n * @api\n */\nvar Zoom = /*@__PURE__*/(function (Control) {\n  function Zoom(opt_options) {\n\n    var options = opt_options ? opt_options : {};\n\n    Control.call(this, {\n      element: document.createElement('div'),\n      target: options.target\n    });\n\n    var className = options.className !== undefined ? options.className : 'ol-zoom';\n\n    var delta = options.delta !== undefined ? options.delta : 1;\n\n    var zoomInLabel = options.zoomInLabel !== undefined ? options.zoomInLabel : '+';\n    var zoomOutLabel = options.zoomOutLabel !== undefined ? options.zoomOutLabel : '\\u2212';\n\n    var zoomInTipLabel = options.zoomInTipLabel !== undefined ?\n      options.zoomInTipLabel : 'Zoom in';\n    var zoomOutTipLabel = options.zoomOutTipLabel !== undefined ?\n      options.zoomOutTipLabel : 'Zoom out';\n\n    var inElement = document.createElement('button');\n    inElement.className = className + '-in';\n    inElement.setAttribute('type', 'button');\n    inElement.title = zoomInTipLabel;\n    inElement.appendChild(\n      typeof zoomInLabel === 'string' ? document.createTextNode(zoomInLabel) : zoomInLabel\n    );\n\n    listen(inElement, EventType.CLICK, this.handleClick_.bind(this, delta));\n\n    var outElement = document.createElement('button');\n    outElement.className = className + '-out';\n    outElement.setAttribute('type', 'button');\n    outElement.title = zoomOutTipLabel;\n    outElement.appendChild(\n      typeof zoomOutLabel === 'string' ? document.createTextNode(zoomOutLabel) : zoomOutLabel\n    );\n\n    listen(outElement, EventType.CLICK, this.handleClick_.bind(this, -delta));\n\n    var cssClasses = className + ' ' + CLASS_UNSELECTABLE + ' ' + CLASS_CONTROL;\n    var element = this.element;\n    element.className = cssClasses;\n    element.appendChild(inElement);\n    element.appendChild(outElement);\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n  }\n\n  if ( Control ) Zoom.__proto__ = Control;\n  Zoom.prototype = Object.create( Control && Control.prototype );\n  Zoom.prototype.constructor = Zoom;\n\n  /**\n   * @param {number} delta Zoom delta.\n   * @param {MouseEvent} event The event to handle\n   * @private\n   */\n  Zoom.prototype.handleClick_ = function handleClick_ (delta, event) {\n    event.preventDefault();\n    this.zoomByDelta_(delta);\n  };\n\n  /**\n   * @param {number} delta Zoom delta.\n   * @private\n   */\n  Zoom.prototype.zoomByDelta_ = function zoomByDelta_ (delta) {\n    var map = this.getMap();\n    var view = map.getView();\n    if (!view) {\n      // the map does not have a view, so we can't act\n      // upon it\n      return;\n    }\n    var currentResolution = view.getResolution();\n    if (currentResolution) {\n      var newResolution = view.constrainResolution(currentResolution, delta);\n      if (this.duration_ > 0) {\n        if (view.getAnimating()) {\n          view.cancelAnimations();\n        }\n        view.animate({\n          resolution: newResolution,\n          duration: this.duration_,\n          easing: easeOut\n        });\n      } else {\n        view.setResolution(newResolution);\n      }\n    }\n  };\n\n  return Zoom;\n}(Control));\n\n\nexport default Zoom;\n\n//# sourceMappingURL=Zoom.js.map","/**\n * @module ol/control/util\n */\nimport Collection from '../Collection.js';\nimport Attribution from './Attribution.js';\nimport Rotate from './Rotate.js';\nimport Zoom from './Zoom.js';\n\n\n/**\n * @typedef {Object} DefaultsOptions\n * @property {boolean} [attribution=true] Include\n * {@link module:ol/control/Attribution~Attribution}.\n * @property {import(\"./Attribution.js\").Options} [attributionOptions]\n * Options for {@link module:ol/control/Attribution~Attribution}.\n * @property {boolean} [rotate=true] Include\n * {@link module:ol/control/Rotate~Rotate}.\n * @property {import(\"./Rotate.js\").Options} [rotateOptions] Options\n * for {@link module:ol/control/Rotate~Rotate}.\n * @property {boolean} [zoom] Include {@link module:ol/control/Zoom~Zoom}.\n * @property {import(\"./Zoom.js\").Options} [zoomOptions] Options for\n * {@link module:ol/control/Zoom~Zoom}.\n * @api\n */\n\n\n/**\n * Set of controls included in maps by default. Unless configured otherwise,\n * this returns a collection containing an instance of each of the following\n * controls:\n * * {@link module:ol/control/Zoom~Zoom}\n * * {@link module:ol/control/Rotate~Rotate}\n * * {@link module:ol/control/Attribution~Attribution}\n *\n * @param {DefaultsOptions=} opt_options\n * Defaults options.\n * @return {Collection<import(\"./Control.js\").default>}\n * Controls.\n * @function module:ol/control.defaults\n * @api\n */\nexport function defaults(opt_options) {\n\n  var options = opt_options ? opt_options : {};\n\n  var controls = new Collection();\n\n  var zoomControl = options.zoom !== undefined ? options.zoom : true;\n  if (zoomControl) {\n    controls.push(new Zoom(options.zoomOptions));\n  }\n\n  var rotateControl = options.rotate !== undefined ? options.rotate : true;\n  if (rotateControl) {\n    controls.push(new Rotate(options.rotateOptions));\n  }\n\n  var attributionControl = options.attribution !== undefined ?\n    options.attribution : true;\n  if (attributionControl) {\n    controls.push(new Attribution(options.attributionOptions));\n  }\n\n  return controls;\n}\n\n//# sourceMappingURL=util.js.map","/**\n * @module ol/Kinetic\n */\n\n/**\n * @classdesc\n * Implementation of inertial deceleration for map movement.\n *\n * @api\n */\nvar Kinetic = function Kinetic(decay, minVelocity, delay) {\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.decay_ = decay;\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.minVelocity_ = minVelocity;\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.delay_ = delay;\n\n  /**\n   * @private\n   * @type {Array<number>}\n   */\n  this.points_ = [];\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.angle_ = 0;\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.initialVelocity_ = 0;\n};\n\n/**\n * FIXME empty description for jsdoc\n */\nKinetic.prototype.begin = function begin () {\n  this.points_.length = 0;\n  this.angle_ = 0;\n  this.initialVelocity_ = 0;\n};\n\n/**\n * @param {number} x X.\n * @param {number} y Y.\n */\nKinetic.prototype.update = function update (x, y) {\n  this.points_.push(x, y, Date.now());\n};\n\n/**\n * @return {boolean} Whether we should do kinetic animation.\n */\nKinetic.prototype.end = function end () {\n  if (this.points_.length < 6) {\n    // at least 2 points are required (i.e. there must be at least 6 elements\n    // in the array)\n    return false;\n  }\n  var delay = Date.now() - this.delay_;\n  var lastIndex = this.points_.length - 3;\n  if (this.points_[lastIndex + 2] < delay) {\n    // the last tracked point is too old, which means that the user stopped\n    // panning before releasing the map\n    return false;\n  }\n\n  // get the first point which still falls into the delay time\n  var firstIndex = lastIndex - 3;\n  while (firstIndex > 0 && this.points_[firstIndex + 2] > delay) {\n    firstIndex -= 3;\n  }\n\n  var duration = this.points_[lastIndex + 2] - this.points_[firstIndex + 2];\n  // we don't want a duration of 0 (divide by zero)\n  // we also make sure the user panned for a duration of at least one frame\n  // (1/60s) to compute sane displacement values\n  if (duration < 1000 / 60) {\n    return false;\n  }\n\n  var dx = this.points_[lastIndex] - this.points_[firstIndex];\n  var dy = this.points_[lastIndex + 1] - this.points_[firstIndex + 1];\n  this.angle_ = Math.atan2(dy, dx);\n  this.initialVelocity_ = Math.sqrt(dx * dx + dy * dy) / duration;\n  return this.initialVelocity_ > this.minVelocity_;\n};\n\n/**\n * @return {number} Total distance travelled (pixels).\n */\nKinetic.prototype.getDistance = function getDistance () {\n  return (this.minVelocity_ - this.initialVelocity_) / this.decay_;\n};\n\n/**\n * @return {number} Angle of the kinetic panning animation (radians).\n */\nKinetic.prototype.getAngle = function getAngle () {\n  return this.angle_;\n};\n\nexport default Kinetic;\n\n//# sourceMappingURL=Kinetic.js.map","/**\n * @module ol/interaction/Property\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  ACTIVE: 'active'\n};\n\n//# sourceMappingURL=Property.js.map","/**\n * @module ol/interaction/Interaction\n */\nimport BaseObject from '../Object.js';\nimport {easeOut, linear} from '../easing.js';\nimport InteractionProperty from './Property.js';\nimport {clamp} from '../math.js';\n\n\n/**\n * Object literal with config options for interactions.\n * @typedef {Object} InteractionOptions\n * @property {function(import(\"../MapBrowserEvent.js\").default):boolean} handleEvent\n * Method called by the map to notify the interaction that a browser event was\n * dispatched to the map. If the function returns a falsy value, propagation of\n * the event to other interactions in the map's interactions chain will be\n * prevented (this includes functions with no explicit return).\n */\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * User actions that change the state of the map. Some are similar to controls,\n * but are not associated with a DOM element.\n * For example, {@link module:ol/interaction/KeyboardZoom~KeyboardZoom} is\n * functionally the same as {@link module:ol/control/Zoom~Zoom}, but triggered\n * by a keyboard event not a button element event.\n * Although interactions do not have a DOM element, some of them do render\n * vectors and so are visible on the screen.\n * @api\n */\nvar Interaction = /*@__PURE__*/(function (BaseObject) {\n  function Interaction(options) {\n    BaseObject.call(this);\n\n    if (options.handleEvent) {\n      this.handleEvent = options.handleEvent;\n    }\n\n    /**\n     * @private\n     * @type {import(\"../PluggableMap.js\").default}\n     */\n    this.map_ = null;\n\n    this.setActive(true);\n  }\n\n  if ( BaseObject ) Interaction.__proto__ = BaseObject;\n  Interaction.prototype = Object.create( BaseObject && BaseObject.prototype );\n  Interaction.prototype.constructor = Interaction;\n\n  /**\n   * Return whether the interaction is currently active.\n   * @return {boolean} `true` if the interaction is active, `false` otherwise.\n   * @observable\n   * @api\n   */\n  Interaction.prototype.getActive = function getActive () {\n    return /** @type {boolean} */ (this.get(InteractionProperty.ACTIVE));\n  };\n\n  /**\n   * Get the map associated with this interaction.\n   * @return {import(\"../PluggableMap.js\").default} Map.\n   * @api\n   */\n  Interaction.prototype.getMap = function getMap () {\n    return this.map_;\n  };\n\n  /**\n   * Handles the {@link module:ol/MapBrowserEvent map browser event}.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n   * @return {boolean} `false` to stop event propagation.\n   * @api\n   */\n  Interaction.prototype.handleEvent = function handleEvent (mapBrowserEvent) {\n    return true;\n  };\n\n  /**\n   * Activate or deactivate the interaction.\n   * @param {boolean} active Active.\n   * @observable\n   * @api\n   */\n  Interaction.prototype.setActive = function setActive (active) {\n    this.set(InteractionProperty.ACTIVE, active);\n  };\n\n  /**\n   * Remove the interaction from its current map and attach it to the new map.\n   * Subclasses may set up event handlers to get notified about changes to\n   * the map here.\n   * @param {import(\"../PluggableMap.js\").default} map Map.\n   */\n  Interaction.prototype.setMap = function setMap (map) {\n    this.map_ = map;\n  };\n\n  return Interaction;\n}(BaseObject));\n\n\n/**\n * @param {import(\"../View.js\").default} view View.\n * @param {import(\"../coordinate.js\").Coordinate} delta Delta.\n * @param {number=} opt_duration Duration.\n */\nexport function pan(view, delta, opt_duration) {\n  var currentCenter = view.getCenter();\n  if (currentCenter) {\n    var center = view.constrainCenter(\n      [currentCenter[0] + delta[0], currentCenter[1] + delta[1]]);\n    if (opt_duration) {\n      view.animate({\n        duration: opt_duration,\n        easing: linear,\n        center: center\n      });\n    } else {\n      view.setCenter(center);\n    }\n  }\n}\n\n\n/**\n * @param {import(\"../View.js\").default} view View.\n * @param {number|undefined} rotation Rotation.\n * @param {import(\"../coordinate.js\").Coordinate=} opt_anchor Anchor coordinate.\n * @param {number=} opt_duration Duration.\n */\nexport function rotate(view, rotation, opt_anchor, opt_duration) {\n  rotation = view.constrainRotation(rotation, 0);\n  rotateWithoutConstraints(view, rotation, opt_anchor, opt_duration);\n}\n\n\n/**\n * @param {import(\"../View.js\").default} view View.\n * @param {number|undefined} rotation Rotation.\n * @param {import(\"../coordinate.js\").Coordinate=} opt_anchor Anchor coordinate.\n * @param {number=} opt_duration Duration.\n */\nexport function rotateWithoutConstraints(view, rotation, opt_anchor, opt_duration) {\n  if (rotation !== undefined) {\n    var currentRotation = view.getRotation();\n    var currentCenter = view.getCenter();\n    if (currentRotation !== undefined && currentCenter && opt_duration > 0) {\n      view.animate({\n        rotation: rotation,\n        anchor: opt_anchor,\n        duration: opt_duration,\n        easing: easeOut\n      });\n    } else {\n      view.rotate(rotation, opt_anchor);\n    }\n  }\n}\n\n\n/**\n * @param {import(\"../View.js\").default} view View.\n * @param {number|undefined} resolution Resolution to go to.\n * @param {import(\"../coordinate.js\").Coordinate=} opt_anchor Anchor coordinate.\n * @param {number=} opt_duration Duration.\n * @param {number=} opt_direction Zooming direction; > 0 indicates\n *     zooming out, in which case the constraints system will select\n *     the largest nearest resolution; < 0 indicates zooming in, in\n *     which case the constraints system will select the smallest\n *     nearest resolution; == 0 indicates that the zooming direction\n *     is unknown/not relevant, in which case the constraints system\n *     will select the nearest resolution. If not defined 0 is\n *     assumed.\n */\nexport function zoom(view, resolution, opt_anchor, opt_duration, opt_direction) {\n  resolution = view.constrainResolution(resolution, 0, opt_direction);\n  zoomWithoutConstraints(view, resolution, opt_anchor, opt_duration);\n}\n\n\n/**\n * @param {import(\"../View.js\").default} view View.\n * @param {number} delta Delta from previous zoom level.\n * @param {import(\"../coordinate.js\").Coordinate=} opt_anchor Anchor coordinate.\n * @param {number=} opt_duration Duration.\n */\nexport function zoomByDelta(view, delta, opt_anchor, opt_duration) {\n  var currentResolution = view.getResolution();\n  var resolution = view.constrainResolution(currentResolution, delta, 0);\n\n  if (resolution !== undefined) {\n    var resolutions = view.getResolutions();\n    resolution = clamp(\n      resolution,\n      view.getMinResolution() || resolutions[resolutions.length - 1],\n      view.getMaxResolution() || resolutions[0]);\n  }\n\n  // If we have a constraint on center, we need to change the anchor so that the\n  // new center is within the extent. We first calculate the new center, apply\n  // the constraint to it, and then calculate back the anchor\n  if (opt_anchor && resolution !== undefined && resolution !== currentResolution) {\n    var currentCenter = view.getCenter();\n    var center = view.calculateCenterZoom(resolution, opt_anchor);\n    center = view.constrainCenter(center);\n\n    opt_anchor = [\n      (resolution * currentCenter[0] - currentResolution * center[0]) /\n          (resolution - currentResolution),\n      (resolution * currentCenter[1] - currentResolution * center[1]) /\n          (resolution - currentResolution)\n    ];\n  }\n\n  zoomWithoutConstraints(view, resolution, opt_anchor, opt_duration);\n}\n\n\n/**\n * @param {import(\"../View.js\").default} view View.\n * @param {number|undefined} resolution Resolution to go to.\n * @param {import(\"../coordinate.js\").Coordinate=} opt_anchor Anchor coordinate.\n * @param {number=} opt_duration Duration.\n */\nexport function zoomWithoutConstraints(view, resolution, opt_anchor, opt_duration) {\n  if (resolution) {\n    var currentResolution = view.getResolution();\n    var currentCenter = view.getCenter();\n    if (currentResolution !== undefined && currentCenter &&\n        resolution !== currentResolution && opt_duration) {\n      view.animate({\n        resolution: resolution,\n        anchor: opt_anchor,\n        duration: opt_duration,\n        easing: easeOut\n      });\n    } else {\n      if (opt_anchor) {\n        var center = view.calculateCenterZoom(resolution, opt_anchor);\n        view.setCenter(center);\n      }\n      view.setResolution(resolution);\n    }\n  }\n}\n\nexport default Interaction;\n\n//# sourceMappingURL=Interaction.js.map","/**\n * @module ol/interaction/DoubleClickZoom\n */\nimport MapBrowserEventType from '../MapBrowserEventType.js';\nimport Interaction, {zoomByDelta} from './Interaction.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=250] Animation duration in milliseconds.\n * @property {number} [delta=1] The zoom delta applied on each double click.\n */\n\n\n/**\n * @classdesc\n * Allows the user to zoom by double-clicking on the map.\n * @api\n */\nvar DoubleClickZoom = /*@__PURE__*/(function (Interaction) {\n  function DoubleClickZoom(opt_options) {\n    Interaction.call(this, {\n      handleEvent: handleEvent\n    });\n\n    var options = opt_options ? opt_options : {};\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.delta_ = options.delta ? options.delta : 1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n  }\n\n  if ( Interaction ) DoubleClickZoom.__proto__ = Interaction;\n  DoubleClickZoom.prototype = Object.create( Interaction && Interaction.prototype );\n  DoubleClickZoom.prototype.constructor = DoubleClickZoom;\n\n  return DoubleClickZoom;\n}(Interaction));\n\n\n/**\n * Handles the {@link module:ol/MapBrowserEvent map browser event} (if it was a\n * doubleclick) and eventually zooms the map.\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} `false` to stop event propagation.\n * @this {DoubleClickZoom}\n */\nfunction handleEvent(mapBrowserEvent) {\n  var stopEvent = false;\n  if (mapBrowserEvent.type == MapBrowserEventType.DBLCLICK) {\n    var browserEvent = /** @type {MouseEvent} */ (mapBrowserEvent.originalEvent);\n    var map = mapBrowserEvent.map;\n    var anchor = mapBrowserEvent.coordinate;\n    var delta = browserEvent.shiftKey ? -this.delta_ : this.delta_;\n    var view = map.getView();\n    zoomByDelta(view, delta, anchor, this.duration_);\n    mapBrowserEvent.preventDefault();\n    stopEvent = true;\n  }\n  return !stopEvent;\n}\n\nexport default DoubleClickZoom;\n\n//# sourceMappingURL=DoubleClickZoom.js.map","/**\n * @module ol/events/condition\n */\nimport MapBrowserEventType from '../MapBrowserEventType.js';\nimport {assert} from '../asserts.js';\nimport {TRUE, FALSE} from '../functions.js';\nimport {WEBKIT, MAC} from '../has.js';\n\n\n/**\n * A function that takes an {@link module:ol/MapBrowserEvent} and returns a\n * `{boolean}`. If the condition is met, true should be returned.\n *\n * @typedef {function(this: ?, import(\"../MapBrowserEvent.js\").default): boolean} Condition\n */\n\n\n/**\n * Return `true` if only the alt-key is pressed, `false` otherwise (e.g. when\n * additionally the shift-key is pressed).\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if only the alt key is pressed.\n * @api\n */\nexport var altKeyOnly = function(mapBrowserEvent) {\n  var originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (mapBrowserEvent.originalEvent);\n  return (\n    originalEvent.altKey &&\n      !(originalEvent.metaKey || originalEvent.ctrlKey) &&\n      !originalEvent.shiftKey);\n};\n\n\n/**\n * Return `true` if only the alt-key and shift-key is pressed, `false` otherwise\n * (e.g. when additionally the platform-modifier-key is pressed).\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if only the alt and shift keys are pressed.\n * @api\n */\nexport var altShiftKeysOnly = function(mapBrowserEvent) {\n  var originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (mapBrowserEvent.originalEvent);\n  return (\n    originalEvent.altKey &&\n      !(originalEvent.metaKey || originalEvent.ctrlKey) &&\n      originalEvent.shiftKey);\n};\n\n\n/**\n * Return `true` if the map has the focus. This condition requires a map target\n * element with a `tabindex` attribute, e.g. `<div id=\"map\" tabindex=\"1\">`.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} event Map browser event.\n * @return {boolean} The map has the focus.\n * @api\n */\nexport var focus = function(event) {\n  return event.target.getTargetElement() === document.activeElement;\n};\n\n\n/**\n * Return always true.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True.\n * @api\n */\nexport var always = TRUE;\n\n\n/**\n * Return `true` if the event is a `click` event, `false` otherwise.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event is a map `click` event.\n * @api\n */\nexport var click = function(mapBrowserEvent) {\n  return mapBrowserEvent.type == MapBrowserEventType.CLICK;\n};\n\n\n/**\n * Return `true` if the event has an \"action\"-producing mouse button.\n *\n * By definition, this includes left-click on windows/linux, and left-click\n * without the ctrl key on Macs.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} The result.\n */\nexport var mouseActionButton = function(mapBrowserEvent) {\n  var originalEvent = /** @type {MouseEvent} */ (mapBrowserEvent.originalEvent);\n  return originalEvent.button == 0 &&\n      !(WEBKIT && MAC && originalEvent.ctrlKey);\n};\n\n\n/**\n * Return always false.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} False.\n * @api\n */\nexport var never = FALSE;\n\n\n/**\n * Return `true` if the browser event is a `pointermove` event, `false`\n * otherwise.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the browser event is a `pointermove` event.\n * @api\n */\nexport var pointerMove = function(mapBrowserEvent) {\n  return mapBrowserEvent.type == 'pointermove';\n};\n\n\n/**\n * Return `true` if the event is a map `singleclick` event, `false` otherwise.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event is a map `singleclick` event.\n * @api\n */\nexport var singleClick = function(mapBrowserEvent) {\n  return mapBrowserEvent.type == MapBrowserEventType.SINGLECLICK;\n};\n\n\n/**\n * Return `true` if the event is a map `dblclick` event, `false` otherwise.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event is a map `dblclick` event.\n * @api\n */\nexport var doubleClick = function(mapBrowserEvent) {\n  return mapBrowserEvent.type == MapBrowserEventType.DBLCLICK;\n};\n\n\n/**\n * Return `true` if no modifier key (alt-, shift- or platform-modifier-key) is\n * pressed.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True only if there no modifier keys are pressed.\n * @api\n */\nexport var noModifierKeys = function(mapBrowserEvent) {\n  var originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (mapBrowserEvent.originalEvent);\n  return (\n    !originalEvent.altKey &&\n      !(originalEvent.metaKey || originalEvent.ctrlKey) &&\n      !originalEvent.shiftKey);\n};\n\n\n/**\n * Return `true` if only the platform-modifier-key (the meta-key on Mac,\n * ctrl-key otherwise) is pressed, `false` otherwise (e.g. when additionally\n * the shift-key is pressed).\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if only the platform modifier key is pressed.\n * @api\n */\nexport var platformModifierKeyOnly = function(mapBrowserEvent) {\n  var originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (mapBrowserEvent.originalEvent);\n  return !originalEvent.altKey &&\n    (MAC ? originalEvent.metaKey : originalEvent.ctrlKey) &&\n    !originalEvent.shiftKey;\n};\n\n\n/**\n * Return `true` if only the shift-key is pressed, `false` otherwise (e.g. when\n * additionally the alt-key is pressed).\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if only the shift key is pressed.\n * @api\n */\nexport var shiftKeyOnly = function(mapBrowserEvent) {\n  var originalEvent = /** @type {KeyboardEvent|MouseEvent|TouchEvent} */ (mapBrowserEvent.originalEvent);\n  return (\n    !originalEvent.altKey &&\n      !(originalEvent.metaKey || originalEvent.ctrlKey) &&\n      originalEvent.shiftKey);\n};\n\n\n/**\n * Return `true` if the target element is not editable, i.e. not a `<input>`-,\n * `<select>`- or `<textarea>`-element, `false` otherwise.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True only if the target element is not editable.\n * @api\n */\nexport var targetNotEditable = function(mapBrowserEvent) {\n  var target = mapBrowserEvent.originalEvent.target;\n  var tagName = /** @type {Element} */ (target).tagName;\n  return (\n    tagName !== 'INPUT' &&\n      tagName !== 'SELECT' &&\n      tagName !== 'TEXTAREA');\n};\n\n\n/**\n * Return `true` if the event originates from a mouse device.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event originates from a mouse device.\n * @api\n */\nexport var mouseOnly = function(mapBrowserEvent) {\n  var pointerEvent = /** @type {import(\"../MapBrowserPointerEvent\").default} */ (mapBrowserEvent).pointerEvent;\n  assert(pointerEvent !== undefined, 56); // mapBrowserEvent must originate from a pointer event\n  // see http://www.w3.org/TR/pointerevents/#widl-PointerEvent-pointerType\n  return pointerEvent.pointerType == 'mouse';\n};\n\n\n/**\n * Return `true` if the event originates from a primary pointer in\n * contact with the surface or if the left mouse button is pressed.\n * See http://www.w3.org/TR/pointerevents/#button-states.\n *\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event originates from a primary pointer.\n * @api\n */\nexport var primaryAction = function(mapBrowserEvent) {\n  var pointerEvent = /** @type {import(\"../MapBrowserPointerEvent\").default} */ (mapBrowserEvent).pointerEvent;\n  assert(pointerEvent !== undefined, 56); // mapBrowserEvent must originate from a pointer event\n  return pointerEvent.isPrimary && pointerEvent.button === 0;\n};\n\n//# sourceMappingURL=condition.js.map","/**\n * @module ol/interaction/Pointer\n */\nimport MapBrowserEventType from '../MapBrowserEventType.js';\nimport Interaction from './Interaction.js';\nimport {getValues} from '../obj.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {function(import(\"../MapBrowserPointerEvent.js\").default):boolean} [handleDownEvent]\n * Function handling \"down\" events. If the function returns `true` then a drag\n * sequence is started.\n * @property {function(import(\"../MapBrowserPointerEvent.js\").default)} [handleDragEvent]\n * Function handling \"drag\" events. This function is called on \"move\" events\n * during a drag sequence.\n * @property {function(import(\"../MapBrowserEvent.js\").default):boolean} [handleEvent]\n * Method called by the map to notify the interaction that a browser event was\n * dispatched to the map. The function may return `false` to prevent the\n * propagation of the event to other interactions in the map's interactions\n * chain.\n * @property {function(import(\"../MapBrowserPointerEvent.js\").default)} [handleMoveEvent]\n * Function handling \"move\" events. This function is called on \"move\" events,\n * also during a drag sequence (so during a drag sequence both the\n * `handleDragEvent` function and this function are called).\n * @property {function(import(\"../MapBrowserPointerEvent.js\").default):boolean} [handleUpEvent]\n *  Function handling \"up\" events. If the function returns `false` then the\n * current drag sequence is stopped.\n * @property {function(boolean):boolean} [stopDown]\n * Should the down event be propagated to other interactions, or should be\n * stopped?\n */\n\n\n/**\n * @classdesc\n * Base class that calls user-defined functions on `down`, `move` and `up`\n * events. This class also manages \"drag sequences\".\n *\n * When the `handleDownEvent` user function returns `true` a drag sequence is\n * started. During a drag sequence the `handleDragEvent` user function is\n * called on `move` events. The drag sequence ends when the `handleUpEvent`\n * user function is called and returns `false`.\n * @api\n */\nvar PointerInteraction = /*@__PURE__*/(function (Interaction) {\n  function PointerInteraction(opt_options) {\n\n    var options = opt_options ? opt_options : {};\n\n    Interaction.call(/** @type {import(\"./Interaction.js\").InteractionOptions} */ this, (options));\n\n    if (options.handleDownEvent) {\n      this.handleDownEvent = options.handleDownEvent;\n    }\n\n    if (options.handleDragEvent) {\n      this.handleDragEvent = options.handleDragEvent;\n    }\n\n    if (options.handleMoveEvent) {\n      this.handleMoveEvent = options.handleMoveEvent;\n    }\n\n    if (options.handleUpEvent) {\n      this.handleUpEvent = options.handleUpEvent;\n    }\n\n    if (options.stopDown) {\n      this.stopDown = options.stopDown;\n    }\n\n    /**\n     * @type {boolean}\n     * @protected\n     */\n    this.handlingDownUpSequence = false;\n\n    /**\n     * @type {!Object<string, import(\"../pointer/PointerEvent.js\").default>}\n     * @private\n     */\n    this.trackedPointers_ = {};\n\n    /**\n     * @type {Array<import(\"../pointer/PointerEvent.js\").default>}\n     * @protected\n     */\n    this.targetPointers = [];\n\n  }\n\n  if ( Interaction ) PointerInteraction.__proto__ = Interaction;\n  PointerInteraction.prototype = Object.create( Interaction && Interaction.prototype );\n  PointerInteraction.prototype.constructor = PointerInteraction;\n\n  /**\n   * Handle pointer down events.\n   * @param {import(\"../MapBrowserPointerEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   * @protected\n   */\n  PointerInteraction.prototype.handleDownEvent = function handleDownEvent (mapBrowserEvent) {\n    return false;\n  };\n\n  /**\n   * Handle pointer drag events.\n   * @param {import(\"../MapBrowserPointerEvent.js\").default} mapBrowserEvent Event.\n   * @protected\n   */\n  PointerInteraction.prototype.handleDragEvent = function handleDragEvent (mapBrowserEvent) {};\n\n  /**\n   * Handles the {@link module:ol/MapBrowserEvent map browser event} and may call into\n   * other functions, if event sequences like e.g. 'drag' or 'down-up' etc. are\n   * detected.\n   * @override\n   * @api\n   */\n  PointerInteraction.prototype.handleEvent = function handleEvent (mapBrowserEvent) {\n    if (!(/** @type {import(\"../MapBrowserPointerEvent.js\").default} */ (mapBrowserEvent).pointerEvent)) {\n      return true;\n    }\n\n    var stopEvent = false;\n    this.updateTrackedPointers_(mapBrowserEvent);\n    if (this.handlingDownUpSequence) {\n      if (mapBrowserEvent.type == MapBrowserEventType.POINTERDRAG) {\n        this.handleDragEvent(mapBrowserEvent);\n      } else if (mapBrowserEvent.type == MapBrowserEventType.POINTERUP) {\n        var handledUp = this.handleUpEvent(mapBrowserEvent);\n        this.handlingDownUpSequence = handledUp && this.targetPointers.length > 0;\n      }\n    } else {\n      if (mapBrowserEvent.type == MapBrowserEventType.POINTERDOWN) {\n        var handled = this.handleDownEvent(mapBrowserEvent);\n        if (handled) {\n          mapBrowserEvent.preventDefault();\n        }\n        this.handlingDownUpSequence = handled;\n        stopEvent = this.stopDown(handled);\n      } else if (mapBrowserEvent.type == MapBrowserEventType.POINTERMOVE) {\n        this.handleMoveEvent(mapBrowserEvent);\n      }\n    }\n    return !stopEvent;\n  };\n\n  /**\n   * Handle pointer move events.\n   * @param {import(\"../MapBrowserPointerEvent.js\").default} mapBrowserEvent Event.\n   * @protected\n   */\n  PointerInteraction.prototype.handleMoveEvent = function handleMoveEvent (mapBrowserEvent) {};\n\n  /**\n   * Handle pointer up events.\n   * @param {import(\"../MapBrowserPointerEvent.js\").default} mapBrowserEvent Event.\n   * @return {boolean} If the event was consumed.\n   * @protected\n   */\n  PointerInteraction.prototype.handleUpEvent = function handleUpEvent (mapBrowserEvent) {\n    return false;\n  };\n\n  /**\n   * This function is used to determine if \"down\" events should be propagated\n   * to other interactions or should be stopped.\n   * @param {boolean} handled Was the event handled by the interaction?\n   * @return {boolean} Should the `down` event be stopped?\n   */\n  PointerInteraction.prototype.stopDown = function stopDown (handled) {\n    return handled;\n  };\n\n  /**\n   * @param {import(\"../MapBrowserPointerEvent.js\").default} mapBrowserEvent Event.\n   * @private\n   */\n  PointerInteraction.prototype.updateTrackedPointers_ = function updateTrackedPointers_ (mapBrowserEvent) {\n    if (isPointerDraggingEvent(mapBrowserEvent)) {\n      var event = mapBrowserEvent.pointerEvent;\n\n      var id = event.pointerId.toString();\n      if (mapBrowserEvent.type == MapBrowserEventType.POINTERUP) {\n        delete this.trackedPointers_[id];\n      } else if (mapBrowserEvent.type ==\n          MapBrowserEventType.POINTERDOWN) {\n        this.trackedPointers_[id] = event;\n      } else if (id in this.trackedPointers_) {\n        // update only when there was a pointerdown event for this pointer\n        this.trackedPointers_[id] = event;\n      }\n      this.targetPointers = getValues(this.trackedPointers_);\n    }\n  };\n\n  return PointerInteraction;\n}(Interaction));\n\n\n/**\n * @param {Array<import(\"../pointer/PointerEvent.js\").default>} pointerEvents List of events.\n * @return {import(\"../pixel.js\").Pixel} Centroid pixel.\n */\nexport function centroid(pointerEvents) {\n  var length = pointerEvents.length;\n  var clientX = 0;\n  var clientY = 0;\n  for (var i = 0; i < length; i++) {\n    clientX += pointerEvents[i].clientX;\n    clientY += pointerEvents[i].clientY;\n  }\n  return [clientX / length, clientY / length];\n}\n\n\n/**\n * @param {import(\"../MapBrowserPointerEvent.js\").default} mapBrowserEvent Event.\n * @return {boolean} Whether the event is a pointerdown, pointerdrag\n *     or pointerup event.\n */\nfunction isPointerDraggingEvent(mapBrowserEvent) {\n  var type = mapBrowserEvent.type;\n  return type === MapBrowserEventType.POINTERDOWN ||\n    type === MapBrowserEventType.POINTERDRAG ||\n    type === MapBrowserEventType.POINTERUP;\n}\n\n\nexport default PointerInteraction;\n\n//# sourceMappingURL=Pointer.js.map","/**\n * @module ol/interaction/DragPan\n */\nimport ViewHint from '../ViewHint.js';\nimport {scale as scaleCoordinate, rotate as rotateCoordinate, add as addCoordinate} from '../coordinate.js';\nimport {easeOut} from '../easing.js';\nimport {noModifierKeys} from '../events/condition.js';\nimport {FALSE} from '../functions.js';\nimport PointerInteraction, {centroid as centroidFromPointers} from './Pointer.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a boolean\n * to indicate whether that event should be handled.\n * Default is {@link module:ol/events/condition~noModifierKeys}.\n * @property {import(\"../Kinetic.js\").default} [kinetic] Kinetic inertia to apply to the pan.\n */\n\n\n/**\n * @classdesc\n * Allows the user to pan the map by dragging the map.\n * @api\n */\nvar DragPan = /*@__PURE__*/(function (PointerInteraction) {\n  function DragPan(opt_options) {\n\n    PointerInteraction.call(this, {\n      stopDown: FALSE\n    });\n\n    var options = opt_options ? opt_options : {};\n\n    /**\n     * @private\n     * @type {import(\"../Kinetic.js\").default|undefined}\n     */\n    this.kinetic_ = options.kinetic;\n\n    /**\n     * @type {import(\"../pixel.js\").Pixel}\n     */\n    this.lastCentroid = null;\n\n    /**\n     * @type {number}\n     */\n    this.lastPointersCount_;\n\n    /**\n     * @type {boolean}\n     */\n    this.panning_ = false;\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.condition ? options.condition : noModifierKeys;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.noKinetic_ = false;\n\n  }\n\n  if ( PointerInteraction ) DragPan.__proto__ = PointerInteraction;\n  DragPan.prototype = Object.create( PointerInteraction && PointerInteraction.prototype );\n  DragPan.prototype.constructor = DragPan;\n\n  /**\n   * @inheritDoc\n   */\n  DragPan.prototype.handleDragEvent = function handleDragEvent (mapBrowserEvent) {\n    if (!this.panning_) {\n      this.panning_ = true;\n      this.getMap().getView().setHint(ViewHint.INTERACTING, 1);\n    }\n    var targetPointers = this.targetPointers;\n    var centroid = centroidFromPointers(targetPointers);\n    if (targetPointers.length == this.lastPointersCount_) {\n      if (this.kinetic_) {\n        this.kinetic_.update(centroid[0], centroid[1]);\n      }\n      if (this.lastCentroid) {\n        var deltaX = this.lastCentroid[0] - centroid[0];\n        var deltaY = centroid[1] - this.lastCentroid[1];\n        var map = mapBrowserEvent.map;\n        var view = map.getView();\n        var center = [deltaX, deltaY];\n        scaleCoordinate(center, view.getResolution());\n        rotateCoordinate(center, view.getRotation());\n        addCoordinate(center, view.getCenter());\n        center = view.constrainCenter(center);\n        view.setCenter(center);\n      }\n    } else if (this.kinetic_) {\n      // reset so we don't overestimate the kinetic energy after\n      // after one finger down, tiny drag, second finger down\n      this.kinetic_.begin();\n    }\n    this.lastCentroid = centroid;\n    this.lastPointersCount_ = targetPointers.length;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  DragPan.prototype.handleUpEvent = function handleUpEvent (mapBrowserEvent) {\n    var map = mapBrowserEvent.map;\n    var view = map.getView();\n    if (this.targetPointers.length === 0) {\n      if (!this.noKinetic_ && this.kinetic_ && this.kinetic_.end()) {\n        var distance = this.kinetic_.getDistance();\n        var angle = this.kinetic_.getAngle();\n        var center = /** @type {!import(\"../coordinate.js\").Coordinate} */ (view.getCenter());\n        var centerpx = map.getPixelFromCoordinate(center);\n        var dest = map.getCoordinateFromPixel([\n          centerpx[0] - distance * Math.cos(angle),\n          centerpx[1] - distance * Math.sin(angle)\n        ]);\n        view.animate({\n          center: view.constrainCenter(dest),\n          duration: 500,\n          easing: easeOut\n        });\n      }\n      if (this.panning_) {\n        this.panning_ = false;\n        view.setHint(ViewHint.INTERACTING, -1);\n      }\n      return false;\n    } else {\n      if (this.kinetic_) {\n        // reset so we don't overestimate the kinetic energy after\n        // after one finger up, tiny drag, second finger up\n        this.kinetic_.begin();\n      }\n      this.lastCentroid = null;\n      return true;\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  DragPan.prototype.handleDownEvent = function handleDownEvent (mapBrowserEvent) {\n    if (this.targetPointers.length > 0 && this.condition_(mapBrowserEvent)) {\n      var map = mapBrowserEvent.map;\n      var view = map.getView();\n      this.lastCentroid = null;\n      // stop any current animation\n      if (view.getAnimating()) {\n        view.setCenter(mapBrowserEvent.frameState.viewState.center);\n      }\n      if (this.kinetic_) {\n        this.kinetic_.begin();\n      }\n      // No kinetic as soon as more than one pointer on the screen is\n      // detected. This is to prevent nasty pans after pinch.\n      this.noKinetic_ = this.targetPointers.length > 1;\n      return true;\n    } else {\n      return false;\n    }\n  };\n\n  return DragPan;\n}(PointerInteraction));\n\nexport default DragPan;\n\n//# sourceMappingURL=DragPan.js.map","/**\n * @module ol/interaction/DragRotate\n */\nimport {disable} from '../rotationconstraint.js';\nimport ViewHint from '../ViewHint.js';\nimport {altShiftKeysOnly, mouseOnly, mouseActionButton} from '../events/condition.js';\nimport {FALSE} from '../functions.js';\nimport {rotate, rotateWithoutConstraints} from './Interaction.js';\nimport PointerInteraction from './Pointer.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that takes an\n * {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a boolean\n * to indicate whether that event should be handled.\n * Default is {@link module:ol/events/condition~altShiftKeysOnly}.\n * @property {number} [duration=250] Animation duration in milliseconds.\n */\n\n\n/**\n * @classdesc\n * Allows the user to rotate the map by clicking and dragging on the map,\n * normally combined with an {@link module:ol/events/condition} that limits\n * it to when the alt and shift keys are held down.\n *\n * This interaction is only supported for mouse devices.\n * @api\n */\nvar DragRotate = /*@__PURE__*/(function (PointerInteraction) {\n  function DragRotate(opt_options) {\n\n    var options = opt_options ? opt_options : {};\n\n    PointerInteraction.call(this, {\n      stopDown: FALSE\n    });\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.condition ? options.condition : altShiftKeysOnly;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.lastAngle_ = undefined;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n  }\n\n  if ( PointerInteraction ) DragRotate.__proto__ = PointerInteraction;\n  DragRotate.prototype = Object.create( PointerInteraction && PointerInteraction.prototype );\n  DragRotate.prototype.constructor = DragRotate;\n\n  /**\n   * @inheritDoc\n   */\n  DragRotate.prototype.handleDragEvent = function handleDragEvent (mapBrowserEvent) {\n    if (!mouseOnly(mapBrowserEvent)) {\n      return;\n    }\n\n    var map = mapBrowserEvent.map;\n    var view = map.getView();\n    if (view.getConstraints().rotation === disable) {\n      return;\n    }\n    var size = map.getSize();\n    var offset = mapBrowserEvent.pixel;\n    var theta =\n        Math.atan2(size[1] / 2 - offset[1], offset[0] - size[0] / 2);\n    if (this.lastAngle_ !== undefined) {\n      var delta = theta - this.lastAngle_;\n      var rotation = view.getRotation();\n      rotateWithoutConstraints(view, rotation - delta);\n    }\n    this.lastAngle_ = theta;\n  };\n\n\n  /**\n   * @inheritDoc\n   */\n  DragRotate.prototype.handleUpEvent = function handleUpEvent (mapBrowserEvent) {\n    if (!mouseOnly(mapBrowserEvent)) {\n      return true;\n    }\n\n    var map = mapBrowserEvent.map;\n    var view = map.getView();\n    view.setHint(ViewHint.INTERACTING, -1);\n    var rotation = view.getRotation();\n    rotate(view, rotation, undefined, this.duration_);\n    return false;\n  };\n\n\n  /**\n   * @inheritDoc\n   */\n  DragRotate.prototype.handleDownEvent = function handleDownEvent (mapBrowserEvent) {\n    if (!mouseOnly(mapBrowserEvent)) {\n      return false;\n    }\n\n    if (mouseActionButton(mapBrowserEvent) && this.condition_(mapBrowserEvent)) {\n      var map = mapBrowserEvent.map;\n      map.getView().setHint(ViewHint.INTERACTING, 1);\n      this.lastAngle_ = undefined;\n      return true;\n    } else {\n      return false;\n    }\n  };\n\n  return DragRotate;\n}(PointerInteraction));\n\nexport default DragRotate;\n\n//# sourceMappingURL=DragRotate.js.map","/**\n * @module ol/render/Box\n */\n\nimport Disposable from '../Disposable.js';\nimport Polygon from '../geom/Polygon.js';\n\nvar RenderBox = /*@__PURE__*/(function (Disposable) {\n  function RenderBox(className) {\n    Disposable.call(this);\n\n    /**\n     * @type {import(\"../geom/Polygon.js\").default}\n     * @private\n     */\n    this.geometry_ = null;\n\n    /**\n     * @type {HTMLDivElement}\n     * @private\n     */\n    this.element_ = /** @type {HTMLDivElement} */ (document.createElement('div'));\n    this.element_.style.position = 'absolute';\n    this.element_.className = 'ol-box ' + className;\n\n    /**\n     * @private\n     * @type {import(\"../PluggableMap.js\").default}\n     */\n    this.map_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../pixel.js\").Pixel}\n     */\n    this.startPixel_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../pixel.js\").Pixel}\n     */\n    this.endPixel_ = null;\n\n  }\n\n  if ( Disposable ) RenderBox.__proto__ = Disposable;\n  RenderBox.prototype = Object.create( Disposable && Disposable.prototype );\n  RenderBox.prototype.constructor = RenderBox;\n\n  /**\n   * @inheritDoc\n   */\n  RenderBox.prototype.disposeInternal = function disposeInternal () {\n    this.setMap(null);\n  };\n\n  /**\n   * @private\n   */\n  RenderBox.prototype.render_ = function render_ () {\n    var startPixel = this.startPixel_;\n    var endPixel = this.endPixel_;\n    var px = 'px';\n    var style = this.element_.style;\n    style.left = Math.min(startPixel[0], endPixel[0]) + px;\n    style.top = Math.min(startPixel[1], endPixel[1]) + px;\n    style.width = Math.abs(endPixel[0] - startPixel[0]) + px;\n    style.height = Math.abs(endPixel[1] - startPixel[1]) + px;\n  };\n\n  /**\n   * @param {import(\"../PluggableMap.js\").default} map Map.\n   */\n  RenderBox.prototype.setMap = function setMap (map) {\n    if (this.map_) {\n      this.map_.getOverlayContainer().removeChild(this.element_);\n      var style = this.element_.style;\n      style.left = style.top = style.width = style.height = 'inherit';\n    }\n    this.map_ = map;\n    if (this.map_) {\n      this.map_.getOverlayContainer().appendChild(this.element_);\n    }\n  };\n\n  /**\n   * @param {import(\"../pixel.js\").Pixel} startPixel Start pixel.\n   * @param {import(\"../pixel.js\").Pixel} endPixel End pixel.\n   */\n  RenderBox.prototype.setPixels = function setPixels (startPixel, endPixel) {\n    this.startPixel_ = startPixel;\n    this.endPixel_ = endPixel;\n    this.createOrUpdateGeometry();\n    this.render_();\n  };\n\n  /**\n   * Creates or updates the cached geometry.\n   */\n  RenderBox.prototype.createOrUpdateGeometry = function createOrUpdateGeometry () {\n    var startPixel = this.startPixel_;\n    var endPixel = this.endPixel_;\n    var pixels = [\n      startPixel,\n      [startPixel[0], endPixel[1]],\n      endPixel,\n      [endPixel[0], startPixel[1]]\n    ];\n    var coordinates = pixels.map(this.map_.getCoordinateFromPixel, this.map_);\n    // close the polygon\n    coordinates[4] = coordinates[0].slice();\n    if (!this.geometry_) {\n      this.geometry_ = new Polygon([coordinates]);\n    } else {\n      this.geometry_.setCoordinates([coordinates]);\n    }\n  };\n\n  /**\n   * @return {import(\"../geom/Polygon.js\").default} Geometry.\n   */\n  RenderBox.prototype.getGeometry = function getGeometry () {\n    return this.geometry_;\n  };\n\n  return RenderBox;\n}(Disposable));\n\n\nexport default RenderBox;\n\n//# sourceMappingURL=Box.js.map","/**\n * @module ol/interaction/DragBox\n */\n// FIXME draw drag box\nimport Event from '../events/Event.js';\nimport {always, mouseOnly, mouseActionButton} from '../events/condition.js';\nimport {VOID} from '../functions.js';\nimport PointerInteraction from './Pointer.js';\nimport RenderBox from '../render/Box.js';\n\n\n/**\n * A function that takes a {@link module:ol/MapBrowserEvent} and two\n * {@link module:ol/pixel~Pixel}s and returns a `{boolean}`. If the condition is met,\n * true should be returned.\n * @typedef {function(this: ?, import(\"../MapBrowserEvent.js\").default, import(\"../pixel.js\").Pixel, import(\"../pixel.js\").Pixel):boolean} EndCondition\n */\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-dragbox'] CSS class name for styling the box.\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a boolean\n * to indicate whether that event should be handled.\n * Default is {@link ol/events/condition~always}.\n * @property {number} [minArea=64] The minimum area of the box in pixel, this value is used by the default\n * `boxEndCondition` function.\n * @property {EndCondition} [boxEndCondition] A function that takes a {@link module:ol/MapBrowserEvent~MapBrowserEvent} and two\n * {@link module:ol/pixel~Pixel}s to indicate whether a `boxend` event should be fired.\n * Default is `true` if the area of the box is bigger than the `minArea` option.\n * @property {function(this:DragBox, import(\"../MapBrowserEvent.js\").default)} onBoxEnd Code to execute just\n * before `boxend` is fired.\n */\n\n\n/**\n * @enum {string}\n */\nvar DragBoxEventType = {\n  /**\n   * Triggered upon drag box start.\n   * @event DragBoxEvent#boxstart\n   * @api\n   */\n  BOXSTART: 'boxstart',\n\n  /**\n   * Triggered on drag when box is active.\n   * @event DragBoxEvent#boxdrag\n   * @api\n   */\n  BOXDRAG: 'boxdrag',\n\n  /**\n   * Triggered upon drag box end.\n   * @event DragBoxEvent#boxend\n   * @api\n   */\n  BOXEND: 'boxend'\n};\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/interaction/DragBox~DragBox} instances are instances of\n * this type.\n */\nvar DragBoxEvent = /*@__PURE__*/(function (Event) {\n  function DragBoxEvent(type, coordinate, mapBrowserEvent) {\n    Event.call(this, type);\n\n    /**\n     * The coordinate of the drag event.\n     * @const\n     * @type {import(\"../coordinate.js\").Coordinate}\n     * @api\n     */\n    this.coordinate = coordinate;\n\n    /**\n     * @const\n     * @type {import(\"../MapBrowserEvent.js\").default}\n     * @api\n     */\n    this.mapBrowserEvent = mapBrowserEvent;\n\n  }\n\n  if ( Event ) DragBoxEvent.__proto__ = Event;\n  DragBoxEvent.prototype = Object.create( Event && Event.prototype );\n  DragBoxEvent.prototype.constructor = DragBoxEvent;\n\n  return DragBoxEvent;\n}(Event));\n\n\n/**\n * @classdesc\n * Allows the user to draw a vector box by clicking and dragging on the map,\n * normally combined with an {@link module:ol/events/condition} that limits\n * it to when the shift or other key is held down. This is used, for example,\n * for zooming to a specific area of the map\n * (see {@link module:ol/interaction/DragZoom~DragZoom} and\n * {@link module:ol/interaction/DragRotateAndZoom}).\n *\n * This interaction is only supported for mouse devices.\n *\n * @fires DragBoxEvent\n * @api\n */\nvar DragBox = /*@__PURE__*/(function (PointerInteraction) {\n  function DragBox(opt_options) {\n\n    PointerInteraction.call(this);\n\n    var options = opt_options ? opt_options : {};\n\n    /**\n    * @type {import(\"../render/Box.js\").default}\n    * @private\n    */\n    this.box_ = new RenderBox(options.className || 'ol-dragbox');\n\n    /**\n    * @type {number}\n    * @private\n    */\n    this.minArea_ = options.minArea !== undefined ? options.minArea : 64;\n\n    /**\n     * Function to execute just before `onboxend` is fired\n     * @type {function(this:DragBox, import(\"../MapBrowserEvent.js\").default)}\n     * @private\n     */\n    this.onBoxEnd_ = options.onBoxEnd ? options.onBoxEnd : VOID;\n\n    /**\n    * @type {import(\"../pixel.js\").Pixel}\n    * @private\n    */\n    this.startPixel_ = null;\n\n    /**\n    * @private\n    * @type {import(\"../events/condition.js\").Condition}\n    */\n    this.condition_ = options.condition ? options.condition : always;\n\n    /**\n    * @private\n    * @type {EndCondition}\n    */\n    this.boxEndCondition_ = options.boxEndCondition ?\n      options.boxEndCondition : this.defaultBoxEndCondition;\n  }\n\n  if ( PointerInteraction ) DragBox.__proto__ = PointerInteraction;\n  DragBox.prototype = Object.create( PointerInteraction && PointerInteraction.prototype );\n  DragBox.prototype.constructor = DragBox;\n\n  /**\n   * The default condition for determining whether the boxend event\n   * should fire.\n   * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent The originating MapBrowserEvent\n   *     leading to the box end.\n   * @param {import(\"../pixel.js\").Pixel} startPixel The starting pixel of the box.\n   * @param {import(\"../pixel.js\").Pixel} endPixel The end pixel of the box.\n   * @return {boolean} Whether or not the boxend condition should be fired.\n   */\n  DragBox.prototype.defaultBoxEndCondition = function defaultBoxEndCondition (mapBrowserEvent, startPixel, endPixel) {\n    var width = endPixel[0] - startPixel[0];\n    var height = endPixel[1] - startPixel[1];\n    return width * width + height * height >= this.minArea_;\n  };\n\n  /**\n  * Returns geometry of last drawn box.\n  * @return {import(\"../geom/Polygon.js\").default} Geometry.\n  * @api\n  */\n  DragBox.prototype.getGeometry = function getGeometry () {\n    return this.box_.getGeometry();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  DragBox.prototype.handleDragEvent = function handleDragEvent (mapBrowserEvent) {\n    if (!mouseOnly(mapBrowserEvent)) {\n      return;\n    }\n\n    this.box_.setPixels(this.startPixel_, mapBrowserEvent.pixel);\n\n    this.dispatchEvent(new DragBoxEvent(DragBoxEventType.BOXDRAG,\n      mapBrowserEvent.coordinate, mapBrowserEvent));\n  };\n\n  /**\n   * @inheritDoc\n   */\n  DragBox.prototype.handleUpEvent = function handleUpEvent (mapBrowserEvent) {\n    if (!mouseOnly(mapBrowserEvent)) {\n      return true;\n    }\n\n    this.box_.setMap(null);\n\n    if (this.boxEndCondition_(mapBrowserEvent, this.startPixel_, mapBrowserEvent.pixel)) {\n      this.onBoxEnd_(mapBrowserEvent);\n      this.dispatchEvent(new DragBoxEvent(DragBoxEventType.BOXEND,\n        mapBrowserEvent.coordinate, mapBrowserEvent));\n    }\n    return false;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  DragBox.prototype.handleDownEvent = function handleDownEvent (mapBrowserEvent) {\n    if (!mouseOnly(mapBrowserEvent)) {\n      return false;\n    }\n\n    if (mouseActionButton(mapBrowserEvent) &&\n        this.condition_(mapBrowserEvent)) {\n      this.startPixel_ = mapBrowserEvent.pixel;\n      this.box_.setMap(mapBrowserEvent.map);\n      this.box_.setPixels(this.startPixel_, this.startPixel_);\n      this.dispatchEvent(new DragBoxEvent(DragBoxEventType.BOXSTART,\n        mapBrowserEvent.coordinate, mapBrowserEvent));\n      return true;\n    } else {\n      return false;\n    }\n  };\n\n  return DragBox;\n}(PointerInteraction));\n\n\nexport default DragBox;\n\n//# sourceMappingURL=DragBox.js.map","/**\n * @module ol/interaction/DragZoom\n */\nimport {easeOut} from '../easing.js';\nimport {shiftKeyOnly} from '../events/condition.js';\nimport {createOrUpdateFromCoordinates, getBottomLeft, getCenter, getTopRight, scaleFromCenter} from '../extent.js';\nimport DragBox from './DragBox.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-dragzoom'] CSS class name for styling the\n * box.\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled.\n * Default is {@link module:ol/events/condition~shiftKeyOnly}.\n * @property {number} [duration=200] Animation duration in milliseconds.\n * @property {boolean} [out=false] Use interaction for zooming out.\n */\n\n\n/**\n * @classdesc\n * Allows the user to zoom the map by clicking and dragging on the map,\n * normally combined with an {@link module:ol/events/condition} that limits\n * it to when a key, shift by default, is held down.\n *\n * To change the style of the box, use CSS and the `.ol-dragzoom` selector, or\n * your custom one configured with `className`.\n * @api\n */\nvar DragZoom = /*@__PURE__*/(function (DragBox) {\n  function DragZoom(opt_options) {\n    var options = opt_options ? opt_options : {};\n\n    var condition = options.condition ? options.condition : shiftKeyOnly;\n\n    DragBox.call(this, {\n      condition: condition,\n      className: options.className || 'ol-dragzoom',\n      onBoxEnd: onBoxEnd\n    });\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 200;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.out_ = options.out !== undefined ? options.out : false;\n  }\n\n  if ( DragBox ) DragZoom.__proto__ = DragBox;\n  DragZoom.prototype = Object.create( DragBox && DragBox.prototype );\n  DragZoom.prototype.constructor = DragZoom;\n\n  return DragZoom;\n}(DragBox));\n\n\n/**\n * @this {DragZoom}\n */\nfunction onBoxEnd() {\n  var map = this.getMap();\n  var view = /** @type {!import(\"../View.js\").default} */ (map.getView());\n  var size = /** @type {!import(\"../size.js\").Size} */ (map.getSize());\n  var extent = this.getGeometry().getExtent();\n\n  if (this.out_) {\n    var mapExtent = view.calculateExtent(size);\n    var boxPixelExtent = createOrUpdateFromCoordinates([\n      map.getPixelFromCoordinate(getBottomLeft(extent)),\n      map.getPixelFromCoordinate(getTopRight(extent))]);\n    var factor = view.getResolutionForExtent(boxPixelExtent, size);\n\n    scaleFromCenter(mapExtent, 1 / factor);\n    extent = mapExtent;\n  }\n\n  var resolution = view.constrainResolution(\n    view.getResolutionForExtent(extent, size));\n\n  var center = getCenter(extent);\n  center = view.constrainCenter(center);\n\n  view.animate({\n    resolution: resolution,\n    center: center,\n    duration: this.duration_,\n    easing: easeOut\n  });\n}\n\n\nexport default DragZoom;\n\n//# sourceMappingURL=DragZoom.js.map","/**\n * @module ol/events/KeyCode\n */\n\n/**\n * @enum {number}\n * @const\n */\nexport default {\n  LEFT: 37,\n  UP: 38,\n  RIGHT: 39,\n  DOWN: 40\n};\n\n//# sourceMappingURL=KeyCode.js.map","/**\n * @module ol/interaction/KeyboardPan\n */\nimport {rotate as rotateCoordinate} from '../coordinate.js';\nimport EventType from '../events/EventType.js';\nimport KeyCode from '../events/KeyCode.js';\nimport {noModifierKeys, targetNotEditable} from '../events/condition.js';\nimport Interaction, {pan} from './Interaction.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. Default is\n * {@link module:ol/events/condition~noModifierKeys} and\n * {@link module:ol/events/condition~targetNotEditable}.\n * @property {number} [duration=100] Animation duration in milliseconds.\n * @property {number} [pixelDelta=128] The amount of pixels to pan on each key\n * press.\n */\n\n\n/**\n * @classdesc\n * Allows the user to pan the map using keyboard arrows.\n * Note that, although this interaction is by default included in maps,\n * the keys can only be used when browser focus is on the element to which\n * the keyboard events are attached. By default, this is the map div,\n * though you can change this with the `keyboardEventTarget` in\n * {@link module:ol/Map~Map}. `document` never loses focus but, for any other\n * element, focus will have to be on, and returned to, this element if the keys\n * are to function.\n * See also {@link module:ol/interaction/KeyboardZoom~KeyboardZoom}.\n * @api\n */\nvar KeyboardPan = /*@__PURE__*/(function (Interaction) {\n  function KeyboardPan(opt_options) {\n\n    Interaction.call(this, {\n      handleEvent: handleEvent\n    });\n\n    var options = opt_options || {};\n\n    /**\n     * @private\n     * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Browser event.\n     * @return {boolean} Combined condition result.\n     */\n    this.defaultCondition_ = function(mapBrowserEvent) {\n      return noModifierKeys(mapBrowserEvent) &&\n        targetNotEditable(mapBrowserEvent);\n    };\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.condition !== undefined ?\n      options.condition : this.defaultCondition_;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 100;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.pixelDelta_ = options.pixelDelta !== undefined ?\n      options.pixelDelta : 128;\n\n  }\n\n  if ( Interaction ) KeyboardPan.__proto__ = Interaction;\n  KeyboardPan.prototype = Object.create( Interaction && Interaction.prototype );\n  KeyboardPan.prototype.constructor = KeyboardPan;\n\n  return KeyboardPan;\n}(Interaction));\n\n\n/**\n * Handles the {@link module:ol/MapBrowserEvent map browser event} if it was a\n * `KeyEvent`, and decides the direction to pan to (if an arrow key was\n * pressed).\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} `false` to stop event propagation.\n * @this {KeyboardPan}\n */\nfunction handleEvent(mapBrowserEvent) {\n  var stopEvent = false;\n  if (mapBrowserEvent.type == EventType.KEYDOWN) {\n    var keyEvent = /** @type {KeyboardEvent} */ (mapBrowserEvent.originalEvent);\n    var keyCode = keyEvent.keyCode;\n    if (this.condition_(mapBrowserEvent) &&\n        (keyCode == KeyCode.DOWN ||\n        keyCode == KeyCode.LEFT ||\n        keyCode == KeyCode.RIGHT ||\n        keyCode == KeyCode.UP)) {\n      var map = mapBrowserEvent.map;\n      var view = map.getView();\n      var mapUnitsDelta = view.getResolution() * this.pixelDelta_;\n      var deltaX = 0, deltaY = 0;\n      if (keyCode == KeyCode.DOWN) {\n        deltaY = -mapUnitsDelta;\n      } else if (keyCode == KeyCode.LEFT) {\n        deltaX = -mapUnitsDelta;\n      } else if (keyCode == KeyCode.RIGHT) {\n        deltaX = mapUnitsDelta;\n      } else {\n        deltaY = mapUnitsDelta;\n      }\n      var delta = [deltaX, deltaY];\n      rotateCoordinate(delta, view.getRotation());\n      pan(view, delta, this.duration_);\n      mapBrowserEvent.preventDefault();\n      stopEvent = true;\n    }\n  }\n  return !stopEvent;\n}\n\nexport default KeyboardPan;\n\n//# sourceMappingURL=KeyboardPan.js.map","/**\n * @module ol/interaction/KeyboardZoom\n */\nimport EventType from '../events/EventType.js';\nimport {targetNotEditable} from '../events/condition.js';\nimport Interaction, {zoomByDelta} from './Interaction.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=100] Animation duration in milliseconds.\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. Default is\n * {@link module:ol/events/condition~targetNotEditable}.\n * @property {number} [delta=1] The zoom level delta on each key press.\n */\n\n\n/**\n * @classdesc\n * Allows the user to zoom the map using keyboard + and -.\n * Note that, although this interaction is by default included in maps,\n * the keys can only be used when browser focus is on the element to which\n * the keyboard events are attached. By default, this is the map div,\n * though you can change this with the `keyboardEventTarget` in\n * {@link module:ol/Map~Map}. `document` never loses focus but, for any other\n * element, focus will have to be on, and returned to, this element if the keys\n * are to function.\n * See also {@link module:ol/interaction/KeyboardPan~KeyboardPan}.\n * @api\n */\nvar KeyboardZoom = /*@__PURE__*/(function (Interaction) {\n  function KeyboardZoom(opt_options) {\n\n    Interaction.call(this, {\n      handleEvent: handleEvent\n    });\n\n    var options = opt_options ? opt_options : {};\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.condition ? options.condition : targetNotEditable;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.delta_ = options.delta ? options.delta : 1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 100;\n\n  }\n\n  if ( Interaction ) KeyboardZoom.__proto__ = Interaction;\n  KeyboardZoom.prototype = Object.create( Interaction && Interaction.prototype );\n  KeyboardZoom.prototype.constructor = KeyboardZoom;\n\n  return KeyboardZoom;\n}(Interaction));\n\n\n/**\n * Handles the {@link module:ol/MapBrowserEvent map browser event} if it was a\n * `KeyEvent`, and decides whether to zoom in or out (depending on whether the\n * key pressed was '+' or '-').\n * @param {import(\"../MapBrowserEvent.js\").default} mapBrowserEvent Map browser event.\n * @return {boolean} `false` to stop event propagation.\n * @this {KeyboardZoom}\n */\nfunction handleEvent(mapBrowserEvent) {\n  var stopEvent = false;\n  if (mapBrowserEvent.type == EventType.KEYDOWN ||\n      mapBrowserEvent.type == EventType.KEYPRESS) {\n    var keyEvent = /** @type {KeyboardEvent} */ (mapBrowserEvent.originalEvent);\n    var charCode = keyEvent.charCode;\n    if (this.condition_(mapBrowserEvent) &&\n        (charCode == '+'.charCodeAt(0) || charCode == '-'.charCodeAt(0))) {\n      var map = mapBrowserEvent.map;\n      var delta = (charCode == '+'.charCodeAt(0)) ? this.delta_ : -this.delta_;\n      var view = map.getView();\n      zoomByDelta(view, delta, undefined, this.duration_);\n      mapBrowserEvent.preventDefault();\n      stopEvent = true;\n    }\n  }\n  return !stopEvent;\n}\n\nexport default KeyboardZoom;\n\n//# sourceMappingURL=KeyboardZoom.js.map","/**\n * @module ol/interaction/MouseWheelZoom\n */\nimport ViewHint from '../ViewHint.js';\nimport {always} from '../events/condition.js';\nimport {easeOut} from '../easing.js';\nimport EventType from '../events/EventType.js';\nimport {DEVICE_PIXEL_RATIO, FIREFOX, SAFARI} from '../has.js';\nimport Interaction, {zoomByDelta} from './Interaction.js';\nimport {clamp} from '../math.js';\n\n\n/**\n * Maximum mouse wheel delta.\n * @type {number}\n */\nvar MAX_DELTA = 1;\n\n\n/**\n * @enum {string}\n */\nexport var Mode = {\n  TRACKPAD: 'trackpad',\n  WHEEL: 'wheel'\n};\n\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. Default is\n * {@link module:ol/events/condition~always}.\n * @property {number} [duration=250] Animation duration in milliseconds.\n * @property {number} [timeout=80] Mouse wheel timeout duration in milliseconds.\n * @property {boolean} [constrainResolution=false] When using a trackpad or\n * magic mouse, zoom to the closest integer zoom level after the scroll gesture\n * ends.\n * @property {boolean} [useAnchor=true] Enable zooming using the mouse's\n * location as the anchor. When set to `false`, zooming in and out will zoom to\n * the center of the screen instead of zooming on the mouse's location.\n */\n\n\n/**\n * @classdesc\n * Allows the user to zoom the map by scrolling the mouse wheel.\n * @api\n */\nvar MouseWheelZoom = /*@__PURE__*/(function (Interaction) {\n  function MouseWheelZoom(opt_options) {\n\n    var options = opt_options ? opt_options : {};\n\n    Interaction.call(/** @type {import(\"./Interaction.js\").InteractionOptions} */ this, (options));\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.delta_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.timeout_ = options.timeout !== undefined ? options.timeout : 80;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.useAnchor_ = options.useAnchor !== undefined ? options.useAnchor : true;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.constrainResolution_ = options.constrainResolution || false;\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.condition ? options.condition : always;\n\n    /**\n     * @private\n     * @type {?import(\"../coordinate.js\").Coordinate}\n     */\n    this.lastAnchor_ = null;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.startTime_ = undefined;\n\n    /**\n     * @private\n     * @type {?}\n     */\n    this.timeoutId_;\n\n    /**\n     * @private\n     * @type {Mode|undefined}\n     */\n    this.mode_ = undefined;\n\n    /**\n     * Trackpad events separated by this delay will be considered separate\n     * interactions.\n     * @type {number}\n     */\n    this.trackpadEventGap_ = 400;\n\n    /**\n     * @type {?}\n     */\n    this.trackpadTimeoutId_;\n\n    /**\n     * The number of delta values per zoom level\n     * @private\n     * @type {number}\n     */\n    this.trackpadDeltaPerZoom_ = 300;\n\n    /**\n     * The zoom factor by which scroll zooming is allowed to exceed the limits.\n     * @private\n     * @type {number}\n     */\n    this.trackpadZoomBuffer_ = 1.5;\n\n  }\n\n  if ( Interaction ) MouseWheelZoom.__proto__ = Interaction;\n  MouseWheelZoom.prototype = Object.create( Interaction && Interaction.prototype );\n  MouseWheelZoom.prototype.constructor = MouseWheelZoom;\n\n  /**\n   * @private\n   */\n  MouseWheelZoom.prototype.decrementInteractingHint_ = function decrementInteractingHint_ () {\n    this.trackpadTimeoutId_ = undefined;\n    var view = this.getMap().getView();\n    view.setHint(ViewHint.INTERACTING, -1);\n  };\n\n  /**\n   * Handles the {@link module:ol/MapBrowserEvent map browser event} (if it was a mousewheel-event) and eventually\n   * zooms the map.\n   * @override\n   */\n  MouseWheelZoom.prototype.handleEvent = function handleEvent (mapBrowserEvent) {\n    if (!this.condition_(mapBrowserEvent)) {\n      return true;\n    }\n    var type = mapBrowserEvent.type;\n    if (type !== EventType.WHEEL && type !== EventType.MOUSEWHEEL) {\n      return true;\n    }\n\n    mapBrowserEvent.preventDefault();\n\n    var map = mapBrowserEvent.map;\n    var wheelEvent = /** @type {WheelEvent} */ (mapBrowserEvent.originalEvent);\n\n    if (this.useAnchor_) {\n      this.lastAnchor_ = mapBrowserEvent.coordinate;\n    }\n\n    // Delta normalisation inspired by\n    // https://github.com/mapbox/mapbox-gl-js/blob/001c7b9/js/ui/handler/scroll_zoom.js\n    var delta;\n    if (mapBrowserEvent.type == EventType.WHEEL) {\n      delta = wheelEvent.deltaY;\n      if (FIREFOX &&\n          wheelEvent.deltaMode === WheelEvent.DOM_DELTA_PIXEL) {\n        delta /= DEVICE_PIXEL_RATIO;\n      }\n      if (wheelEvent.deltaMode === WheelEvent.DOM_DELTA_LINE) {\n        delta *= 40;\n      }\n    } else if (mapBrowserEvent.type == EventType.MOUSEWHEEL) {\n      delta = -wheelEvent.wheelDeltaY;\n      if (SAFARI) {\n        delta /= 3;\n      }\n    }\n\n    if (delta === 0) {\n      return false;\n    }\n\n    var now = Date.now();\n\n    if (this.startTime_ === undefined) {\n      this.startTime_ = now;\n    }\n\n    if (!this.mode_ || now - this.startTime_ > this.trackpadEventGap_) {\n      this.mode_ = Math.abs(delta) < 4 ?\n        Mode.TRACKPAD :\n        Mode.WHEEL;\n    }\n\n    if (this.mode_ === Mode.TRACKPAD) {\n      var view = map.getView();\n      if (this.trackpadTimeoutId_) {\n        clearTimeout(this.trackpadTimeoutId_);\n      } else {\n        view.setHint(ViewHint.INTERACTING, 1);\n      }\n      this.trackpadTimeoutId_ = setTimeout(this.decrementInteractingHint_.bind(this), this.trackpadEventGap_);\n      var resolution = view.getResolution() * Math.pow(2, delta / this.trackpadDeltaPerZoom_);\n      var minResolution = view.getMinResolution();\n      var maxResolution = view.getMaxResolution();\n      var rebound = 0;\n      if (resolution < minResolution) {\n        resolution = Math.max(resolution, minResolution / this.trackpadZoomBuffer_);\n        rebound = 1;\n      } else if (resolution > maxResolution) {\n        resolution = Math.min(resolution, maxResolution * this.trackpadZoomBuffer_);\n        rebound = -1;\n      }\n      if (this.lastAnchor_) {\n        var center = view.calculateCenterZoom(resolution, this.lastAnchor_);\n        view.setCenter(view.constrainCenter(center));\n      }\n      view.setResolution(resolution);\n\n      if (rebound === 0 && this.constrainResolution_) {\n        view.animate({\n          resolution: view.constrainResolution(resolution, delta > 0 ? -1 : 1),\n          easing: easeOut,\n          anchor: this.lastAnchor_,\n          duration: this.duration_\n        });\n      }\n\n      if (rebound > 0) {\n        view.animate({\n          resolution: minResolution,\n          easing: easeOut,\n          anchor: this.lastAnchor_,\n          duration: 500\n        });\n      } else if (rebound < 0) {\n        view.animate({\n          resolution: maxResolution,\n          easing: easeOut,\n          anchor: this.lastAnchor_,\n          duration: 500\n        });\n      }\n      this.startTime_ = now;\n      return false;\n    }\n\n    this.delta_ += delta;\n\n    var timeLeft = Math.max(this.timeout_ - (now - this.startTime_), 0);\n\n    clearTimeout(this.timeoutId_);\n    this.timeoutId_ = setTimeout(this.handleWheelZoom_.bind(this, map), timeLeft);\n\n    return false;\n  };\n\n  /**\n   * @private\n   * @param {import(\"../PluggableMap.js\").default} map Map.\n   */\n  MouseWheelZoom.prototype.handleWheelZoom_ = function handleWheelZoom_ (map) {\n    var view = map.getView();\n    if (view.getAnimating()) {\n      view.cancelAnimations();\n    }\n    var maxDelta = MAX_DELTA;\n    var delta = clamp(this.delta_, -maxDelta, maxDelta);\n    zoomByDelta(view, -delta, this.lastAnchor_, this.duration_);\n    this.mode_ = undefined;\n    this.delta_ = 0;\n    this.lastAnchor_ = null;\n    this.startTime_ = undefined;\n    this.timeoutId_ = undefined;\n  };\n\n  /**\n   * Enable or disable using the mouse's location as an anchor when zooming\n   * @param {boolean} useAnchor true to zoom to the mouse's location, false\n   * to zoom to the center of the map\n   * @api\n   */\n  MouseWheelZoom.prototype.setMouseAnchor = function setMouseAnchor (useAnchor) {\n    this.useAnchor_ = useAnchor;\n    if (!useAnchor) {\n      this.lastAnchor_ = null;\n    }\n  };\n\n  return MouseWheelZoom;\n}(Interaction));\n\nexport default MouseWheelZoom;\n\n//# sourceMappingURL=MouseWheelZoom.js.map","/**\n * @module ol/interaction/PinchRotate\n */\nimport ViewHint from '../ViewHint.js';\nimport {FALSE} from '../functions.js';\nimport {rotate, rotateWithoutConstraints} from './Interaction.js';\nimport PointerInteraction, {centroid as centroidFromPointers} from './Pointer.js';\nimport {disable} from '../rotationconstraint.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=250] The duration of the animation in\n * milliseconds.\n * @property {number} [threshold=0.3] Minimal angle in radians to start a rotation.\n */\n\n\n/**\n * @classdesc\n * Allows the user to rotate the map by twisting with two fingers\n * on a touch screen.\n * @api\n */\nvar PinchRotate = /*@__PURE__*/(function (PointerInteraction) {\n  function PinchRotate(opt_options) {\n\n    var options = opt_options ? opt_options : {};\n\n    var pointerOptions = /** @type {import(\"./Pointer.js\").Options} */ (options);\n\n    if (!pointerOptions.stopDown) {\n      pointerOptions.stopDown = FALSE;\n    }\n\n    PointerInteraction.call(this, pointerOptions);\n\n    /**\n     * @private\n     * @type {import(\"../coordinate.js\").Coordinate}\n     */\n    this.anchor_ = null;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.lastAngle_ = undefined;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.rotating_ = false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.rotationDelta_ = 0.0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.threshold_ = options.threshold !== undefined ? options.threshold : 0.3;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n  }\n\n  if ( PointerInteraction ) PinchRotate.__proto__ = PointerInteraction;\n  PinchRotate.prototype = Object.create( PointerInteraction && PointerInteraction.prototype );\n  PinchRotate.prototype.constructor = PinchRotate;\n\n  /**\n   * @inheritDoc\n   */\n  PinchRotate.prototype.handleDragEvent = function handleDragEvent (mapBrowserEvent) {\n    var rotationDelta = 0.0;\n\n    var touch0 = this.targetPointers[0];\n    var touch1 = this.targetPointers[1];\n\n    // angle between touches\n    var angle = Math.atan2(\n      touch1.clientY - touch0.clientY,\n      touch1.clientX - touch0.clientX);\n\n    if (this.lastAngle_ !== undefined) {\n      var delta = angle - this.lastAngle_;\n      this.rotationDelta_ += delta;\n      if (!this.rotating_ &&\n          Math.abs(this.rotationDelta_) > this.threshold_) {\n        this.rotating_ = true;\n      }\n      rotationDelta = delta;\n    }\n    this.lastAngle_ = angle;\n\n    var map = mapBrowserEvent.map;\n    var view = map.getView();\n    if (view.getConstraints().rotation === disable) {\n      return;\n    }\n\n    // rotate anchor point.\n    // FIXME: should be the intersection point between the lines:\n    //     touch0,touch1 and previousTouch0,previousTouch1\n    var viewportPosition = map.getViewport().getBoundingClientRect();\n    var centroid = centroidFromPointers(this.targetPointers);\n    centroid[0] -= viewportPosition.left;\n    centroid[1] -= viewportPosition.top;\n    this.anchor_ = map.getCoordinateFromPixel(centroid);\n\n    // rotate\n    if (this.rotating_) {\n      var rotation = view.getRotation();\n      map.render();\n      rotateWithoutConstraints(view, rotation + rotationDelta, this.anchor_);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  PinchRotate.prototype.handleUpEvent = function handleUpEvent (mapBrowserEvent) {\n    if (this.targetPointers.length < 2) {\n      var map = mapBrowserEvent.map;\n      var view = map.getView();\n      view.setHint(ViewHint.INTERACTING, -1);\n      if (this.rotating_) {\n        var rotation = view.getRotation();\n        rotate(view, rotation, this.anchor_, this.duration_);\n      }\n      return false;\n    } else {\n      return true;\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  PinchRotate.prototype.handleDownEvent = function handleDownEvent (mapBrowserEvent) {\n    if (this.targetPointers.length >= 2) {\n      var map = mapBrowserEvent.map;\n      this.anchor_ = null;\n      this.lastAngle_ = undefined;\n      this.rotating_ = false;\n      this.rotationDelta_ = 0.0;\n      if (!this.handlingDownUpSequence) {\n        map.getView().setHint(ViewHint.INTERACTING, 1);\n      }\n      return true;\n    } else {\n      return false;\n    }\n  };\n\n  return PinchRotate;\n}(PointerInteraction));\n\nexport default PinchRotate;\n\n//# sourceMappingURL=PinchRotate.js.map","/**\n * @module ol/interaction/PinchZoom\n */\nimport ViewHint from '../ViewHint.js';\nimport {FALSE} from '../functions.js';\nimport {zoom, zoomWithoutConstraints} from './Interaction.js';\nimport PointerInteraction, {centroid as centroidFromPointers} from './Pointer.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=400] Animation duration in milliseconds.\n * @property {boolean} [constrainResolution=false] Zoom to the closest integer\n * zoom level after the pinch gesture ends.\n */\n\n\n/**\n * @classdesc\n * Allows the user to zoom the map by pinching with two fingers\n * on a touch screen.\n * @api\n */\nvar PinchZoom = /*@__PURE__*/(function (PointerInteraction) {\n  function PinchZoom(opt_options) {\n\n    var options = opt_options ? opt_options : {};\n\n    var pointerOptions = /** @type {import(\"./Pointer.js\").Options} */ (options);\n\n    if (!pointerOptions.stopDown) {\n      pointerOptions.stopDown = FALSE;\n    }\n\n    PointerInteraction.call(this, pointerOptions);\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.constrainResolution_ = options.constrainResolution || false;\n\n    /**\n     * @private\n     * @type {import(\"../coordinate.js\").Coordinate}\n     */\n    this.anchor_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.duration_ = options.duration !== undefined ? options.duration : 400;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.lastDistance_ = undefined;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.lastScaleDelta_ = 1;\n\n  }\n\n  if ( PointerInteraction ) PinchZoom.__proto__ = PointerInteraction;\n  PinchZoom.prototype = Object.create( PointerInteraction && PointerInteraction.prototype );\n  PinchZoom.prototype.constructor = PinchZoom;\n\n  /**\n   * @inheritDoc\n   */\n  PinchZoom.prototype.handleDragEvent = function handleDragEvent (mapBrowserEvent) {\n    var scaleDelta = 1.0;\n\n    var touch0 = this.targetPointers[0];\n    var touch1 = this.targetPointers[1];\n    var dx = touch0.clientX - touch1.clientX;\n    var dy = touch0.clientY - touch1.clientY;\n\n    // distance between touches\n    var distance = Math.sqrt(dx * dx + dy * dy);\n\n    if (this.lastDistance_ !== undefined) {\n      scaleDelta = this.lastDistance_ / distance;\n    }\n    this.lastDistance_ = distance;\n\n\n    var map = mapBrowserEvent.map;\n    var view = map.getView();\n    var resolution = view.getResolution();\n    var maxResolution = view.getMaxResolution();\n    var minResolution = view.getMinResolution();\n    var newResolution = resolution * scaleDelta;\n    if (newResolution > maxResolution) {\n      scaleDelta = maxResolution / resolution;\n      newResolution = maxResolution;\n    } else if (newResolution < minResolution) {\n      scaleDelta = minResolution / resolution;\n      newResolution = minResolution;\n    }\n\n    if (scaleDelta != 1.0) {\n      this.lastScaleDelta_ = scaleDelta;\n    }\n\n    // scale anchor point.\n    var viewportPosition = map.getViewport().getBoundingClientRect();\n    var centroid = centroidFromPointers(this.targetPointers);\n    centroid[0] -= viewportPosition.left;\n    centroid[1] -= viewportPosition.top;\n    this.anchor_ = map.getCoordinateFromPixel(centroid);\n\n    // scale, bypass the resolution constraint\n    map.render();\n    zoomWithoutConstraints(view, newResolution, this.anchor_);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  PinchZoom.prototype.handleUpEvent = function handleUpEvent (mapBrowserEvent) {\n    if (this.targetPointers.length < 2) {\n      var map = mapBrowserEvent.map;\n      var view = map.getView();\n      view.setHint(ViewHint.INTERACTING, -1);\n      var resolution = view.getResolution();\n      if (this.constrainResolution_ ||\n          resolution < view.getMinResolution() ||\n          resolution > view.getMaxResolution()) {\n        // Zoom to final resolution, with an animation, and provide a\n        // direction not to zoom out/in if user was pinching in/out.\n        // Direction is > 0 if pinching out, and < 0 if pinching in.\n        var direction = this.lastScaleDelta_ - 1;\n        zoom(view, resolution, this.anchor_, this.duration_, direction);\n      }\n      return false;\n    } else {\n      return true;\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  PinchZoom.prototype.handleDownEvent = function handleDownEvent (mapBrowserEvent) {\n    if (this.targetPointers.length >= 2) {\n      var map = mapBrowserEvent.map;\n      this.anchor_ = null;\n      this.lastDistance_ = undefined;\n      this.lastScaleDelta_ = 1;\n      if (!this.handlingDownUpSequence) {\n        map.getView().setHint(ViewHint.INTERACTING, 1);\n      }\n      return true;\n    } else {\n      return false;\n    }\n  };\n\n  return PinchZoom;\n}(PointerInteraction));\n\nexport default PinchZoom;\n\n//# sourceMappingURL=PinchZoom.js.map","/**\n * @module ol/interaction\n */\nimport Collection from './Collection.js';\nimport Kinetic from './Kinetic.js';\nimport DoubleClickZoom from './interaction/DoubleClickZoom.js';\nimport DragPan from './interaction/DragPan.js';\nimport DragRotate from './interaction/DragRotate.js';\nimport DragZoom from './interaction/DragZoom.js';\nimport KeyboardPan from './interaction/KeyboardPan.js';\nimport KeyboardZoom from './interaction/KeyboardZoom.js';\nimport MouseWheelZoom from './interaction/MouseWheelZoom.js';\nimport PinchRotate from './interaction/PinchRotate.js';\nimport PinchZoom from './interaction/PinchZoom.js';\nimport {focus} from './events/condition.js';\n\nexport {default as DoubleClickZoom} from './interaction/DoubleClickZoom.js';\nexport {default as DragAndDrop} from './interaction/DragAndDrop.js';\nexport {default as DragBox} from './interaction/DragBox.js';\nexport {default as DragPan} from './interaction/DragPan.js';\nexport {default as DragRotate} from './interaction/DragRotate.js';\nexport {default as DragRotateAndZoom} from './interaction/DragRotateAndZoom.js';\nexport {default as DragZoom} from './interaction/DragZoom.js';\nexport {default as Draw} from './interaction/Draw.js';\nexport {default as Extent} from './interaction/Extent.js';\nexport {default as Interaction} from './interaction/Interaction.js';\nexport {default as KeyboardPan} from './interaction/KeyboardPan.js';\nexport {default as KeyboardZoom} from './interaction/KeyboardZoom.js';\nexport {default as Modify} from './interaction/Modify.js';\nexport {default as MouseWheelZoom} from './interaction/MouseWheelZoom.js';\nexport {default as PinchRotate} from './interaction/PinchRotate.js';\nexport {default as PinchZoom} from './interaction/PinchZoom.js';\nexport {default as Pointer} from './interaction/Pointer.js';\nexport {default as Select} from './interaction/Select.js';\nexport {default as Snap} from './interaction/Snap.js';\nexport {default as Translate} from './interaction/Translate.js';\n\n\n/**\n * @typedef {Object} DefaultsOptions\n * @property {boolean} [altShiftDragRotate=true] Whether Alt-Shift-drag rotate is\n * desired.\n * @property {boolean} [onFocusOnly=false] Interact only when the map has the\n * focus. This affects the `MouseWheelZoom` and `DragPan` interactions and is\n * useful when page scroll is desired for maps that do not have the browser's\n * focus.\n * @property {boolean} [constrainResolution=false] Zoom to the closest integer\n * zoom level after the wheel/trackpad or pinch gesture ends.\n * @property {boolean} [doubleClickZoom=true] Whether double click zoom is\n * desired.\n * @property {boolean} [keyboard=true] Whether keyboard interaction is desired.\n * @property {boolean} [mouseWheelZoom=true] Whether mousewheel zoom is desired.\n * @property {boolean} [shiftDragZoom=true] Whether Shift-drag zoom is desired.\n * @property {boolean} [dragPan=true] Whether drag pan is desired.\n * @property {boolean} [pinchRotate=true] Whether pinch rotate is desired.\n * @property {boolean} [pinchZoom=true] Whether pinch zoom is desired.\n * @property {number} [zoomDelta] Zoom level delta when using keyboard or\n * mousewheel zoom.\n * @property {number} [zoomDuration] Duration of the zoom animation in\n * milliseconds.\n */\n\n\n/**\n * Set of interactions included in maps by default. Specific interactions can be\n * excluded by setting the appropriate option to false in the constructor\n * options, but the order of the interactions is fixed.  If you want to specify\n * a different order for interactions, you will need to create your own\n * {@link module:ol/interaction/Interaction} instances and insert\n * them into a {@link module:ol/Collection} in the order you want\n * before creating your {@link module:ol/Map~Map} instance. The default set of\n * interactions, in sequence, is:\n * * {@link module:ol/interaction/DragRotate~DragRotate}\n * * {@link module:ol/interaction/DoubleClickZoom~DoubleClickZoom}\n * * {@link module:ol/interaction/DragPan~DragPan}\n * * {@link module:ol/interaction/PinchRotate~PinchRotate}\n * * {@link module:ol/interaction/PinchZoom~PinchZoom}\n * * {@link module:ol/interaction/KeyboardPan~KeyboardPan}\n * * {@link module:ol/interaction/KeyboardZoom~KeyboardZoom}\n * * {@link module:ol/interaction/MouseWheelZoom~MouseWheelZoom}\n * * {@link module:ol/interaction/DragZoom~DragZoom}\n *\n * @param {DefaultsOptions=} opt_options Defaults options.\n * @return {import(\"./Collection.js\").default<import(\"./interaction/Interaction.js\").default>}\n * A collection of interactions to be used with the {@link module:ol/Map~Map}\n * constructor's `interactions` option.\n * @api\n */\nexport function defaults(opt_options) {\n\n  var options = opt_options ? opt_options : {};\n\n  var interactions = new Collection();\n\n  var kinetic = new Kinetic(-0.005, 0.05, 100);\n\n  var altShiftDragRotate = options.altShiftDragRotate !== undefined ?\n    options.altShiftDragRotate : true;\n  if (altShiftDragRotate) {\n    interactions.push(new DragRotate());\n  }\n\n  var doubleClickZoom = options.doubleClickZoom !== undefined ?\n    options.doubleClickZoom : true;\n  if (doubleClickZoom) {\n    interactions.push(new DoubleClickZoom({\n      delta: options.zoomDelta,\n      duration: options.zoomDuration\n    }));\n  }\n\n  var dragPan = options.dragPan !== undefined ? options.dragPan : true;\n  if (dragPan) {\n    interactions.push(new DragPan({\n      condition: options.onFocusOnly ? focus : undefined,\n      kinetic: kinetic\n    }));\n  }\n\n  var pinchRotate = options.pinchRotate !== undefined ? options.pinchRotate :\n    true;\n  if (pinchRotate) {\n    interactions.push(new PinchRotate());\n  }\n\n  var pinchZoom = options.pinchZoom !== undefined ? options.pinchZoom : true;\n  if (pinchZoom) {\n    interactions.push(new PinchZoom({\n      constrainResolution: options.constrainResolution,\n      duration: options.zoomDuration\n    }));\n  }\n\n  var keyboard = options.keyboard !== undefined ? options.keyboard : true;\n  if (keyboard) {\n    interactions.push(new KeyboardPan());\n    interactions.push(new KeyboardZoom({\n      delta: options.zoomDelta,\n      duration: options.zoomDuration\n    }));\n  }\n\n  var mouseWheelZoom = options.mouseWheelZoom !== undefined ?\n    options.mouseWheelZoom : true;\n  if (mouseWheelZoom) {\n    interactions.push(new MouseWheelZoom({\n      condition: options.onFocusOnly ? focus : undefined,\n      constrainResolution: options.constrainResolution,\n      duration: options.zoomDuration\n    }));\n  }\n\n  var shiftDragZoom = options.shiftDragZoom !== undefined ?\n    options.shiftDragZoom : true;\n  if (shiftDragZoom) {\n    interactions.push(new DragZoom({\n      duration: options.zoomDuration\n    }));\n  }\n\n  return interactions;\n\n}\n\n//# sourceMappingURL=interaction.js.map","/**\n * @module ol/reproj/common\n */\n\n/**\n * Default maximum allowed threshold  (in pixels) for reprojection\n * triangulation.\n * @type {number}\n */\nexport var ERROR_THRESHOLD = 0.5;\n\n/**\n * Enable automatic reprojection of raster sources. Default is `true`.\n * TODO: decide if we want to expose this as a build flag or remove it\n * @type {boolean}\n */\nexport var ENABLE_RASTER_REPROJECTION = true;\n\n//# sourceMappingURL=common.js.map","/**\n * @module ol/ImageBase\n */\nimport {abstract} from './util.js';\nimport EventTarget from './events/Target.js';\nimport EventType from './events/EventType.js';\n\n/**\n * @abstract\n */\nvar ImageBase = /*@__PURE__*/(function (EventTarget) {\n  function ImageBase(extent, resolution, pixelRatio, state) {\n\n    EventTarget.call(this);\n\n    /**\n     * @protected\n     * @type {import(\"./extent.js\").Extent}\n     */\n    this.extent = extent;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.pixelRatio_ = pixelRatio;\n\n    /**\n     * @protected\n     * @type {number|undefined}\n     */\n    this.resolution = resolution;\n\n    /**\n     * @protected\n     * @type {import(\"./ImageState.js\").default}\n     */\n    this.state = state;\n\n  }\n\n  if ( EventTarget ) ImageBase.__proto__ = EventTarget;\n  ImageBase.prototype = Object.create( EventTarget && EventTarget.prototype );\n  ImageBase.prototype.constructor = ImageBase;\n\n  /**\n   * @protected\n   */\n  ImageBase.prototype.changed = function changed () {\n    this.dispatchEvent(EventType.CHANGE);\n  };\n\n  /**\n   * @return {import(\"./extent.js\").Extent} Extent.\n   */\n  ImageBase.prototype.getExtent = function getExtent () {\n    return this.extent;\n  };\n\n  /**\n   * @abstract\n   * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.\n   */\n  ImageBase.prototype.getImage = function getImage () {\n    return abstract();\n  };\n\n  /**\n   * @return {number} PixelRatio.\n   */\n  ImageBase.prototype.getPixelRatio = function getPixelRatio () {\n    return this.pixelRatio_;\n  };\n\n  /**\n   * @return {number} Resolution.\n   */\n  ImageBase.prototype.getResolution = function getResolution () {\n    return /** @type {number} */ (this.resolution);\n  };\n\n  /**\n   * @return {import(\"./ImageState.js\").default} State.\n   */\n  ImageBase.prototype.getState = function getState () {\n    return this.state;\n  };\n\n  /**\n   * Load not yet loaded URI.\n   * @abstract\n   */\n  ImageBase.prototype.load = function load () {\n    abstract();\n  };\n\n  return ImageBase;\n}(EventTarget));\n\n\nexport default ImageBase;\n\n//# sourceMappingURL=ImageBase.js.map","/**\n * @module ol/ImageState\n */\n\n/**\n * @enum {number}\n */\nexport default {\n  IDLE: 0,\n  LOADING: 1,\n  LOADED: 2,\n  ERROR: 3\n};\n\n//# sourceMappingURL=ImageState.js.map","/**\n * @module ol/ImageCanvas\n */\nimport ImageBase from './ImageBase.js';\nimport ImageState from './ImageState.js';\n\n\n/**\n * A function that is called to trigger asynchronous canvas drawing.  It is\n * called with a \"done\" callback that should be called when drawing is done.\n * If any error occurs during drawing, the \"done\" callback should be called with\n * that error.\n *\n * @typedef {function(function(Error=))} Loader\n */\n\n\nvar ImageCanvas = /*@__PURE__*/(function (ImageBase) {\n  function ImageCanvas(extent, resolution, pixelRatio, canvas, opt_loader) {\n\n    var state = opt_loader !== undefined ? ImageState.IDLE : ImageState.LOADED;\n\n    ImageBase.call(this, extent, resolution, pixelRatio, state);\n\n    /**\n     * Optional canvas loader function.\n     * @type {?Loader}\n     * @private\n     */\n    this.loader_ = opt_loader !== undefined ? opt_loader : null;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.canvas_ = canvas;\n\n    /**\n     * @private\n     * @type {Error}\n     */\n    this.error_ = null;\n\n  }\n\n  if ( ImageBase ) ImageCanvas.__proto__ = ImageBase;\n  ImageCanvas.prototype = Object.create( ImageBase && ImageBase.prototype );\n  ImageCanvas.prototype.constructor = ImageCanvas;\n\n  /**\n   * Get any error associated with asynchronous rendering.\n   * @return {Error} Any error that occurred during rendering.\n   */\n  ImageCanvas.prototype.getError = function getError () {\n    return this.error_;\n  };\n\n  /**\n   * Handle async drawing complete.\n   * @param {Error=} err Any error during drawing.\n   * @private\n   */\n  ImageCanvas.prototype.handleLoad_ = function handleLoad_ (err) {\n    if (err) {\n      this.error_ = err;\n      this.state = ImageState.ERROR;\n    } else {\n      this.state = ImageState.LOADED;\n    }\n    this.changed();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  ImageCanvas.prototype.load = function load () {\n    if (this.state == ImageState.IDLE) {\n      this.state = ImageState.LOADING;\n      this.changed();\n      this.loader_(this.handleLoad_.bind(this));\n    }\n  };\n\n  /**\n   * @return {HTMLCanvasElement} Canvas element.\n   */\n  ImageCanvas.prototype.getImage = function getImage () {\n    return this.canvas_;\n  };\n\n  return ImageCanvas;\n}(ImageBase));\n\n\nexport default ImageCanvas;\n\n//# sourceMappingURL=ImageCanvas.js.map","/**\n * @module ol/LayerType\n */\n\n/**\n * A layer type used when creating layer renderers.\n * @enum {string}\n */\nexport default {\n  IMAGE: 'IMAGE',\n  TILE: 'TILE',\n  VECTOR_TILE: 'VECTOR_TILE',\n  VECTOR: 'VECTOR'\n};\n\n//# sourceMappingURL=LayerType.js.map","/**\n * @module ol/layer/VectorRenderType\n */\n\n/**\n * @enum {string}\n * Render mode for vector layers:\n *  * `'image'`: Vector layers are rendered as images. Great performance, but\n *    point symbols and texts are always rotated with the view and pixels are\n *    scaled during zoom animations.\n *  * `'vector'`: Vector layers are rendered as vectors. Most accurate rendering\n *    even during animations, but slower performance.\n * @api\n */\nexport default {\n  IMAGE: 'image',\n  VECTOR: 'vector'\n};\n\n//# sourceMappingURL=VectorRenderType.js.map","/**\n * @module ol/render/Event\n */\n\nimport Event from '../events/Event.js';\n\nvar RenderEvent = /*@__PURE__*/(function (Event) {\n  function RenderEvent(type, opt_vectorContext, opt_frameState, opt_context, opt_glContext) {\n\n    Event.call(this, type);\n\n    /**\n     * For canvas, this is an instance of {@link module:ol/render/canvas/Immediate}.\n     * @type {import(\"./VectorContext.js\").default|undefined}\n     * @api\n     */\n    this.vectorContext = opt_vectorContext;\n\n    /**\n     * An object representing the current render frame state.\n     * @type {import(\"../PluggableMap.js\").FrameState|undefined}\n     * @api\n     */\n    this.frameState = opt_frameState;\n\n    /**\n     * Canvas context. Only available when a Canvas renderer is used, null\n     * otherwise.\n     * @type {CanvasRenderingContext2D|null|undefined}\n     * @api\n     */\n    this.context = opt_context;\n\n    /**\n     * WebGL context. Only available when a WebGL renderer is used, null\n     * otherwise.\n     * @type {import(\"../webgl/Context.js\").default|null|undefined}\n     * @api\n     */\n    this.glContext = opt_glContext;\n\n  }\n\n  if ( Event ) RenderEvent.__proto__ = Event;\n  RenderEvent.prototype = Object.create( Event && Event.prototype );\n  RenderEvent.prototype.constructor = RenderEvent;\n\n  return RenderEvent;\n}(Event));\n\nexport default RenderEvent;\n\n//# sourceMappingURL=Event.js.map","/**\n * @module ol/structs/LRUCache\n */\n\nimport {assert} from '../asserts.js';\nimport EventTarget from '../events/Target.js';\nimport EventType from '../events/EventType.js';\n\n\n/**\n * @typedef {Object} Entry\n * @property {string} key_\n * @property {Object} newer\n * @property {Object} older\n * @property {*} value_\n */\n\n\n/**\n * @classdesc\n * Implements a Least-Recently-Used cache where the keys do not conflict with\n * Object's properties (e.g. 'hasOwnProperty' is not allowed as a key). Expiring\n * items from the cache is the responsibility of the user.\n *\n * @fires import(\"../events/Event.js\").Event\n * @template T\n */\nvar LRUCache = /*@__PURE__*/(function (EventTarget) {\n  function LRUCache(opt_highWaterMark) {\n\n    EventTarget.call(this);\n\n    /**\n     * @type {number}\n     */\n    this.highWaterMark = opt_highWaterMark !== undefined ? opt_highWaterMark : 2048;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.count_ = 0;\n\n    /**\n     * @private\n     * @type {!Object<string, Entry>}\n     */\n    this.entries_ = {};\n\n    /**\n     * @private\n     * @type {?Entry}\n     */\n    this.oldest_ = null;\n\n    /**\n     * @private\n     * @type {?Entry}\n     */\n    this.newest_ = null;\n\n  }\n\n  if ( EventTarget ) LRUCache.__proto__ = EventTarget;\n  LRUCache.prototype = Object.create( EventTarget && EventTarget.prototype );\n  LRUCache.prototype.constructor = LRUCache;\n\n\n  /**\n   * @return {boolean} Can expire cache.\n   */\n  LRUCache.prototype.canExpireCache = function canExpireCache () {\n    return this.getCount() > this.highWaterMark;\n  };\n\n\n  /**\n   * FIXME empty description for jsdoc\n   */\n  LRUCache.prototype.clear = function clear () {\n    this.count_ = 0;\n    this.entries_ = {};\n    this.oldest_ = null;\n    this.newest_ = null;\n    this.dispatchEvent(EventType.CLEAR);\n  };\n\n\n  /**\n   * @param {string} key Key.\n   * @return {boolean} Contains key.\n   */\n  LRUCache.prototype.containsKey = function containsKey (key) {\n    return this.entries_.hasOwnProperty(key);\n  };\n\n\n  /**\n   * @param {function(this: S, T, string, LRUCache): ?} f The function\n   *     to call for every entry from the oldest to the newer. This function takes\n   *     3 arguments (the entry value, the entry key and the LRUCache object).\n   *     The return value is ignored.\n   * @param {S=} opt_this The object to use as `this` in `f`.\n   * @template S\n   */\n  LRUCache.prototype.forEach = function forEach (f, opt_this) {\n    var entry = this.oldest_;\n    while (entry) {\n      f.call(opt_this, entry.value_, entry.key_, this);\n      entry = entry.newer;\n    }\n  };\n\n\n  /**\n   * @param {string} key Key.\n   * @return {T} Value.\n   */\n  LRUCache.prototype.get = function get (key) {\n    var entry = this.entries_[key];\n    assert(entry !== undefined,\n      15); // Tried to get a value for a key that does not exist in the cache\n    if (entry === this.newest_) {\n      return entry.value_;\n    } else if (entry === this.oldest_) {\n      this.oldest_ = /** @type {Entry} */ (this.oldest_.newer);\n      this.oldest_.older = null;\n    } else {\n      entry.newer.older = entry.older;\n      entry.older.newer = entry.newer;\n    }\n    entry.newer = null;\n    entry.older = this.newest_;\n    this.newest_.newer = entry;\n    this.newest_ = entry;\n    return entry.value_;\n  };\n\n\n  /**\n   * Remove an entry from the cache.\n   * @param {string} key The entry key.\n   * @return {T} The removed entry.\n   */\n  LRUCache.prototype.remove = function remove (key) {\n    var entry = this.entries_[key];\n    assert(entry !== undefined, 15); // Tried to get a value for a key that does not exist in the cache\n    if (entry === this.newest_) {\n      this.newest_ = /** @type {Entry} */ (entry.older);\n      if (this.newest_) {\n        this.newest_.newer = null;\n      }\n    } else if (entry === this.oldest_) {\n      this.oldest_ = /** @type {Entry} */ (entry.newer);\n      if (this.oldest_) {\n        this.oldest_.older = null;\n      }\n    } else {\n      entry.newer.older = entry.older;\n      entry.older.newer = entry.newer;\n    }\n    delete this.entries_[key];\n    --this.count_;\n    return entry.value_;\n  };\n\n\n  /**\n   * @return {number} Count.\n   */\n  LRUCache.prototype.getCount = function getCount () {\n    return this.count_;\n  };\n\n\n  /**\n   * @return {Array<string>} Keys.\n   */\n  LRUCache.prototype.getKeys = function getKeys () {\n    var keys = new Array(this.count_);\n    var i = 0;\n    var entry;\n    for (entry = this.newest_; entry; entry = entry.older) {\n      keys[i++] = entry.key_;\n    }\n    return keys;\n  };\n\n\n  /**\n   * @return {Array<T>} Values.\n   */\n  LRUCache.prototype.getValues = function getValues () {\n    var values = new Array(this.count_);\n    var i = 0;\n    var entry;\n    for (entry = this.newest_; entry; entry = entry.older) {\n      values[i++] = entry.value_;\n    }\n    return values;\n  };\n\n\n  /**\n   * @return {T} Last value.\n   */\n  LRUCache.prototype.peekLast = function peekLast () {\n    return this.oldest_.value_;\n  };\n\n\n  /**\n   * @return {string} Last key.\n   */\n  LRUCache.prototype.peekLastKey = function peekLastKey () {\n    return this.oldest_.key_;\n  };\n\n\n  /**\n   * Get the key of the newest item in the cache.  Throws if the cache is empty.\n   * @return {string} The newest key.\n   */\n  LRUCache.prototype.peekFirstKey = function peekFirstKey () {\n    return this.newest_.key_;\n  };\n\n\n  /**\n   * @return {T} value Value.\n   */\n  LRUCache.prototype.pop = function pop () {\n    var entry = this.oldest_;\n    delete this.entries_[entry.key_];\n    if (entry.newer) {\n      entry.newer.older = null;\n    }\n    this.oldest_ = /** @type {Entry} */ (entry.newer);\n    if (!this.oldest_) {\n      this.newest_ = null;\n    }\n    --this.count_;\n    return entry.value_;\n  };\n\n\n  /**\n   * @param {string} key Key.\n   * @param {T} value Value.\n   */\n  LRUCache.prototype.replace = function replace (key, value) {\n    this.get(key); // update `newest_`\n    this.entries_[key].value_ = value;\n  };\n\n\n  /**\n   * @param {string} key Key.\n   * @param {T} value Value.\n   */\n  LRUCache.prototype.set = function set (key, value) {\n    assert(!(key in this.entries_),\n      16); // Tried to set a value for a key that is used already\n    var entry = /** @type {Entry} */ ({\n      key_: key,\n      newer: null,\n      older: this.newest_,\n      value_: value\n    });\n    if (!this.newest_) {\n      this.oldest_ = entry;\n    } else {\n      this.newest_.newer = entry;\n    }\n    this.newest_ = entry;\n    this.entries_[key] = entry;\n    ++this.count_;\n  };\n\n\n  /**\n   * Set a maximum number of entries for the cache.\n   * @param {number} size Cache size.\n   * @api\n   */\n  LRUCache.prototype.setSize = function setSize (size) {\n    this.highWaterMark = size;\n  };\n\n\n  /**\n   * Prune the cache.\n   */\n  LRUCache.prototype.prune = function prune () {\n    while (this.canExpireCache()) {\n      this.pop();\n    }\n  };\n\n  return LRUCache;\n}(EventTarget));\n\nexport default LRUCache;\n\n//# sourceMappingURL=LRUCache.js.map","/**\n * @module ol/render/canvas\n */\nimport {getFontFamilies} from '../css.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {clear} from '../obj.js';\nimport LRUCache from '../structs/LRUCache.js';\nimport {create as createTransform} from '../transform.js';\n\n\n/**\n * @typedef {Object} FillState\n * @property {import(\"../colorlike.js\").ColorLike} fillStyle\n */\n\n\n/**\n * @typedef {Object} FillStrokeState\n * @property {import(\"../colorlike.js\").ColorLike} [currentFillStyle]\n * @property {import(\"../colorlike.js\").ColorLike} [currentStrokeStyle]\n * @property {string} [currentLineCap]\n * @property {Array<number>} currentLineDash\n * @property {number} [currentLineDashOffset]\n * @property {string} [currentLineJoin]\n * @property {number} [currentLineWidth]\n * @property {number} [currentMiterLimit]\n * @property {number} [lastStroke]\n * @property {import(\"../colorlike.js\").ColorLike} [fillStyle]\n * @property {import(\"../colorlike.js\").ColorLike} [strokeStyle]\n * @property {string} [lineCap]\n * @property {Array<number>} lineDash\n * @property {number} [lineDashOffset]\n * @property {string} [lineJoin]\n * @property {number} [lineWidth]\n * @property {number} [miterLimit]\n */\n\n\n/**\n * @typedef {Object} StrokeState\n * @property {string} lineCap\n * @property {Array<number>} lineDash\n * @property {number} lineDashOffset\n * @property {string} lineJoin\n * @property {number} lineWidth\n * @property {number} miterLimit\n * @property {import(\"../colorlike.js\").ColorLike} strokeStyle\n */\n\n\n/**\n * @typedef {Object} TextState\n * @property {string} font\n * @property {string} [textAlign]\n * @property {string} textBaseline\n * @property {string} [placement]\n * @property {number} [maxAngle]\n * @property {boolean} [overflow]\n * @property {import(\"../style/Fill.js\").default} [backgroundFill]\n * @property {import(\"../style/Stroke.js\").default} [backgroundStroke]\n * @property {number} [scale]\n * @property {Array<number>} [padding]\n */\n\n\n/**\n * Container for decluttered replay instructions that need to be rendered or\n * omitted together, i.e. when styles render both an image and text, or for the\n * characters that form text along lines. The basic elements of this array are\n * `[minX, minY, maxX, maxY, count]`, where the first four entries are the\n * rendered extent of the group in pixel space. `count` is the number of styles\n * in the group, i.e. 2 when an image and a text are grouped, or 1 otherwise.\n * In addition to these four elements, declutter instruction arrays (i.e. the\n * arguments to {@link module:ol/render/canvas~drawImage} are appended to the array.\n * @typedef {Array<*>} DeclutterGroup\n */\n\n\n/**\n * @const\n * @type {string}\n */\nexport var defaultFont = '10px sans-serif';\n\n\n/**\n * @const\n * @type {import(\"../color.js\").Color}\n */\nexport var defaultFillStyle = [0, 0, 0, 1];\n\n\n/**\n * @const\n * @type {string}\n */\nexport var defaultLineCap = 'round';\n\n\n/**\n * @const\n * @type {Array<number>}\n */\nexport var defaultLineDash = [];\n\n\n/**\n * @const\n * @type {number}\n */\nexport var defaultLineDashOffset = 0;\n\n\n/**\n * @const\n * @type {string}\n */\nexport var defaultLineJoin = 'round';\n\n\n/**\n * @const\n * @type {number}\n */\nexport var defaultMiterLimit = 10;\n\n\n/**\n * @const\n * @type {import(\"../color.js\").Color}\n */\nexport var defaultStrokeStyle = [0, 0, 0, 1];\n\n\n/**\n * @const\n * @type {string}\n */\nexport var defaultTextAlign = 'center';\n\n\n/**\n * @const\n * @type {string}\n */\nexport var defaultTextBaseline = 'middle';\n\n\n/**\n * @const\n * @type {Array<number>}\n */\nexport var defaultPadding = [0, 0, 0, 0];\n\n\n/**\n * @const\n * @type {number}\n */\nexport var defaultLineWidth = 1;\n\n\n/**\n * The label cache for text rendering. To change the default cache size of 2048\n * entries, use {@link module:ol/structs/LRUCache#setSize}.\n * @type {LRUCache<HTMLCanvasElement>}\n * @api\n */\nexport var labelCache = new LRUCache();\n\n\n/**\n * @type {!Object<string, number>}\n */\nexport var checkedFonts = {};\n\n\n/**\n * @type {CanvasRenderingContext2D}\n */\nvar measureContext = null;\n\n\n/**\n * @type {!Object<string, number>}\n */\nexport var textHeights = {};\n\n\n/**\n * Clears the label cache when a font becomes available.\n * @param {string} fontSpec CSS font spec.\n */\nexport var checkFont = (function() {\n  var retries = 60;\n  var checked = checkedFonts;\n  var size = '32px ';\n  var referenceFonts = ['monospace', 'serif'];\n  var len = referenceFonts.length;\n  var text = 'wmytzilWMYTZIL@#/&?$%10\\uF013';\n  var interval, referenceWidth;\n\n  function isAvailable(font) {\n    var context = getMeasureContext();\n    // Check weight ranges according to\n    // https://developer.mozilla.org/en-US/docs/Web/CSS/font-weight#Fallback_weights\n    for (var weight = 100; weight <= 700; weight += 300) {\n      var fontWeight = weight + ' ';\n      var available = true;\n      for (var i = 0; i < len; ++i) {\n        var referenceFont = referenceFonts[i];\n        context.font = fontWeight + size + referenceFont;\n        referenceWidth = context.measureText(text).width;\n        if (font != referenceFont) {\n          context.font = fontWeight + size + font + ',' + referenceFont;\n          var width = context.measureText(text).width;\n          // If width and referenceWidth are the same, then the fallback was used\n          // instead of the font we wanted, so the font is not available.\n          available = available && width != referenceWidth;\n        }\n      }\n      if (available) {\n        // Consider font available when it is available in one weight range.\n        //FIXME With this we miss rare corner cases, so we should consider\n        //FIXME checking availability for each requested weight range.\n        return true;\n      }\n    }\n    return false;\n  }\n\n  function check() {\n    var done = true;\n    for (var font in checked) {\n      if (checked[font] < retries) {\n        if (isAvailable(font)) {\n          checked[font] = retries;\n          clear(textHeights);\n          // Make sure that loaded fonts are picked up by Safari\n          measureContext = null;\n          labelCache.clear();\n        } else {\n          ++checked[font];\n          done = false;\n        }\n      }\n    }\n    if (done) {\n      clearInterval(interval);\n      interval = undefined;\n    }\n  }\n\n  return function(fontSpec) {\n    var fontFamilies = getFontFamilies(fontSpec);\n    if (!fontFamilies) {\n      return;\n    }\n    for (var i = 0, ii = fontFamilies.length; i < ii; ++i) {\n      var fontFamily = fontFamilies[i];\n      if (!(fontFamily in checked)) {\n        checked[fontFamily] = retries;\n        if (!isAvailable(fontFamily)) {\n          checked[fontFamily] = 0;\n          if (interval === undefined) {\n            interval = setInterval(check, 32);\n          }\n        }\n      }\n    }\n  };\n})();\n\n\n/**\n * @return {CanvasRenderingContext2D} Measure context.\n */\nfunction getMeasureContext() {\n  if (!measureContext) {\n    measureContext = createCanvasContext2D(1, 1);\n  }\n  return measureContext;\n}\n\n\n/**\n * @param {string} font Font to use for measuring.\n * @return {import(\"../size.js\").Size} Measurement.\n */\nexport var measureTextHeight = (function() {\n  var span;\n  var heights = textHeights;\n  return function(font) {\n    var height = heights[font];\n    if (height == undefined) {\n      if (!span) {\n        span = document.createElement('span');\n        span.textContent = 'M';\n        span.style.margin = span.style.padding = '0 !important';\n        span.style.position = 'absolute !important';\n        span.style.left = '-99999px !important';\n      }\n      span.style.font = font;\n      document.body.appendChild(span);\n      height = heights[font] = span.offsetHeight;\n      document.body.removeChild(span);\n    }\n    return height;\n  };\n})();\n\n\n/**\n * @param {string} font Font.\n * @param {string} text Text.\n * @return {number} Width.\n */\nexport function measureTextWidth(font, text) {\n  var measureContext = getMeasureContext();\n  if (font != measureContext.font) {\n    measureContext.font = font;\n  }\n  return measureContext.measureText(text).width;\n}\n\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {number} rotation Rotation.\n * @param {number} offsetX X offset.\n * @param {number} offsetY Y offset.\n */\nexport function rotateAtOffset(context, rotation, offsetX, offsetY) {\n  if (rotation !== 0) {\n    context.translate(offsetX, offsetY);\n    context.rotate(rotation);\n    context.translate(-offsetX, -offsetY);\n  }\n}\n\n\nexport var resetTransform = createTransform();\n\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {import(\"../transform.js\").Transform|null} transform Transform.\n * @param {number} opacity Opacity.\n * @param {HTMLImageElement|HTMLCanvasElement|HTMLVideoElement} image Image.\n * @param {number} originX Origin X.\n * @param {number} originY Origin Y.\n * @param {number} w Width.\n * @param {number} h Height.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {number} scale Scale.\n */\nexport function drawImage(context,\n  transform, opacity, image, originX, originY, w, h, x, y, scale) {\n  var alpha;\n  if (opacity != 1) {\n    alpha = context.globalAlpha;\n    context.globalAlpha = alpha * opacity;\n  }\n  if (transform) {\n    context.setTransform.apply(context, transform);\n  }\n\n  context.drawImage(image, originX, originY, w, h, x, y, w * scale, h * scale);\n\n  if (alpha) {\n    context.globalAlpha = alpha;\n  }\n  if (transform) {\n    context.setTransform.apply(context, resetTransform);\n  }\n}\n\n//# sourceMappingURL=canvas.js.map","/**\n * @module ol/color\n */\nimport {assert} from './asserts.js';\nimport {clamp} from './math.js';\n\n\n/**\n * A color represented as a short array [red, green, blue, alpha].\n * red, green, and blue should be integers in the range 0..255 inclusive.\n * alpha should be a float in the range 0..1 inclusive. If no alpha value is\n * given then `1` will be used.\n * @typedef {Array<number>} Color\n * @api\n */\n\n\n/**\n * This RegExp matches # followed by 3, 4, 6, or 8 hex digits.\n * @const\n * @type {RegExp}\n * @private\n */\nvar HEX_COLOR_RE_ = /^#([a-f0-9]{3}|[a-f0-9]{4}(?:[a-f0-9]{2}){0,2})$/i;\n\n\n/**\n * Regular expression for matching potential named color style strings.\n * @const\n * @type {RegExp}\n * @private\n */\nvar NAMED_COLOR_RE_ = /^([a-z]*)$/i;\n\n\n/**\n * Return the color as an rgba string.\n * @param {Color|string} color Color.\n * @return {string} Rgba string.\n * @api\n */\nexport function asString(color) {\n  if (typeof color === 'string') {\n    return color;\n  } else {\n    return toString(color);\n  }\n}\n\n/**\n * Return named color as an rgba string.\n * @param {string} color Named color.\n * @return {string} Rgb string.\n */\nfunction fromNamed(color) {\n  var el = document.createElement('div');\n  el.style.color = color;\n  if (el.style.color !== '') {\n    document.body.appendChild(el);\n    var rgb = getComputedStyle(el).color;\n    document.body.removeChild(el);\n    return rgb;\n  } else {\n    return '';\n  }\n}\n\n\n/**\n * @param {string} s String.\n * @return {Color} Color.\n */\nexport var fromString = (\n  function() {\n\n    // We maintain a small cache of parsed strings.  To provide cheap LRU-like\n    // semantics, whenever the cache grows too large we simply delete an\n    // arbitrary 25% of the entries.\n\n    /**\n     * @const\n     * @type {number}\n     */\n    var MAX_CACHE_SIZE = 1024;\n\n    /**\n     * @type {Object<string, Color>}\n     */\n    var cache = {};\n\n    /**\n     * @type {number}\n     */\n    var cacheSize = 0;\n\n    return (\n      /**\n       * @param {string} s String.\n       * @return {Color} Color.\n       */\n      function(s) {\n        var color;\n        if (cache.hasOwnProperty(s)) {\n          color = cache[s];\n        } else {\n          if (cacheSize >= MAX_CACHE_SIZE) {\n            var i = 0;\n            for (var key in cache) {\n              if ((i++ & 3) === 0) {\n                delete cache[key];\n                --cacheSize;\n              }\n            }\n          }\n          color = fromStringInternal_(s);\n          cache[s] = color;\n          ++cacheSize;\n        }\n        return color;\n      }\n    );\n\n  })();\n\n/**\n * Return the color as an array. This function maintains a cache of calculated\n * arrays which means the result should not be modified.\n * @param {Color|string} color Color.\n * @return {Color} Color.\n * @api\n */\nexport function asArray(color) {\n  if (Array.isArray(color)) {\n    return color;\n  } else {\n    return fromString(color);\n  }\n}\n\n/**\n * @param {string} s String.\n * @private\n * @return {Color} Color.\n */\nfunction fromStringInternal_(s) {\n  var r, g, b, a, color;\n\n  if (NAMED_COLOR_RE_.exec(s)) {\n    s = fromNamed(s);\n  }\n\n  if (HEX_COLOR_RE_.exec(s)) { // hex\n    var n = s.length - 1; // number of hex digits\n    var d; // number of digits per channel\n    if (n <= 4) {\n      d = 1;\n    } else {\n      d = 2;\n    }\n    var hasAlpha = n === 4 || n === 8;\n    r = parseInt(s.substr(1 + 0 * d, d), 16);\n    g = parseInt(s.substr(1 + 1 * d, d), 16);\n    b = parseInt(s.substr(1 + 2 * d, d), 16);\n    if (hasAlpha) {\n      a = parseInt(s.substr(1 + 3 * d, d), 16);\n    } else {\n      a = 255;\n    }\n    if (d == 1) {\n      r = (r << 4) + r;\n      g = (g << 4) + g;\n      b = (b << 4) + b;\n      if (hasAlpha) {\n        a = (a << 4) + a;\n      }\n    }\n    color = [r, g, b, a / 255];\n  } else if (s.indexOf('rgba(') == 0) { // rgba()\n    color = s.slice(5, -1).split(',').map(Number);\n    normalize(color);\n  } else if (s.indexOf('rgb(') == 0) { // rgb()\n    color = s.slice(4, -1).split(',').map(Number);\n    color.push(1);\n    normalize(color);\n  } else {\n    assert(false, 14); // Invalid color\n  }\n  return color;\n}\n\n\n/**\n * TODO this function is only used in the test, we probably shouldn't export it\n * @param {Color} color Color.\n * @return {Color} Clamped color.\n */\nexport function normalize(color) {\n  color[0] = clamp((color[0] + 0.5) | 0, 0, 255);\n  color[1] = clamp((color[1] + 0.5) | 0, 0, 255);\n  color[2] = clamp((color[2] + 0.5) | 0, 0, 255);\n  color[3] = clamp(color[3], 0, 1);\n  return color;\n}\n\n\n/**\n * @param {Color} color Color.\n * @return {string} String.\n */\nexport function toString(color) {\n  var r = color[0];\n  if (r != (r | 0)) {\n    r = (r + 0.5) | 0;\n  }\n  var g = color[1];\n  if (g != (g | 0)) {\n    g = (g + 0.5) | 0;\n  }\n  var b = color[2];\n  if (b != (b | 0)) {\n    b = (b + 0.5) | 0;\n  }\n  var a = color[3] === undefined ? 1 : color[3];\n  return 'rgba(' + r + ',' + g + ',' + b + ',' + a + ')';\n}\n\n//# sourceMappingURL=color.js.map","/**\n * @module ol/colorlike\n */\nimport {toString} from './color.js';\n\n\n/**\n * A type accepted by CanvasRenderingContext2D.fillStyle\n * or CanvasRenderingContext2D.strokeStyle.\n * Represents a color, pattern, or gradient. The origin for patterns and\n * gradients as fill style is an increment of 512 css pixels from map coordinate\n * `[0, 0]`. For seamless repeat patterns, width and height of the pattern image\n * must be a factor of two (2, 4, 8, ..., 512).\n *\n * @typedef {string|CanvasPattern|CanvasGradient} ColorLike\n * @api\n */\n\n\n/**\n * @param {import(\"./color.js\").Color|ColorLike} color Color.\n * @return {ColorLike} The color as an {@link ol/colorlike~ColorLike}.\n * @api\n */\nexport function asColorLike(color) {\n  if (Array.isArray(color)) {\n    return toString(color);\n  } else {\n    return color;\n  }\n}\n\n//# sourceMappingURL=colorlike.js.map","/**\n * @module ol/render/VectorContext\n */\n\n/**\n * @classdesc\n * Context for drawing geometries.  A vector context is available on render\n * events and does not need to be constructed directly.\n * @api\n */\nvar VectorContext = function VectorContext () {};\n\nVectorContext.prototype.drawCustom = function drawCustom (geometry, feature, renderer) {};\n\n/**\n * Render a geometry.\n *\n * @param {import(\"../geom/Geometry.js\").default} geometry The geometry to render.\n */\nVectorContext.prototype.drawGeometry = function drawGeometry (geometry) {};\n\n/**\n * Set the rendering style.\n *\n * @param {import(\"../style/Style.js\").default} style The rendering style.\n */\nVectorContext.prototype.setStyle = function setStyle (style) {};\n\n/**\n * @param {import(\"../geom/Circle.js\").default} circleGeometry Circle geometry.\n * @param {import(\"../Feature.js\").default} feature Feature.\n */\nVectorContext.prototype.drawCircle = function drawCircle (circleGeometry, feature) {};\n\n/**\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {import(\"../style/Style.js\").default} style Style.\n */\nVectorContext.prototype.drawFeature = function drawFeature (feature, style) {};\n\n/**\n * @param {import(\"../geom/GeometryCollection.js\").default} geometryCollectionGeometry Geometry collection.\n * @param {import(\"../Feature.js\").default} feature Feature.\n */\nVectorContext.prototype.drawGeometryCollection = function drawGeometryCollection (geometryCollectionGeometry, feature) {};\n\n/**\n * @param {import(\"../geom/LineString.js\").default|import(\"./Feature.js\").default} lineStringGeometry Line string geometry.\n * @param {import(\"../Feature.js\").default|import(\"./Feature.js\").default} feature Feature.\n */\nVectorContext.prototype.drawLineString = function drawLineString (lineStringGeometry, feature) {};\n\n/**\n * @param {import(\"../geom/MultiLineString.js\").default|import(\"./Feature.js\").default} multiLineStringGeometry MultiLineString geometry.\n * @param {import(\"../Feature.js\").default|import(\"./Feature.js\").default} feature Feature.\n */\nVectorContext.prototype.drawMultiLineString = function drawMultiLineString (multiLineStringGeometry, feature) {};\n\n/**\n * @param {import(\"../geom/MultiPoint.js\").default|import(\"./Feature.js\").default} multiPointGeometry MultiPoint geometry.\n * @param {import(\"../Feature.js\").default|import(\"./Feature.js\").default} feature Feature.\n */\nVectorContext.prototype.drawMultiPoint = function drawMultiPoint (multiPointGeometry, feature) {};\n\n/**\n * @param {import(\"../geom/MultiPolygon.js\").default} multiPolygonGeometry MultiPolygon geometry.\n * @param {import(\"../Feature.js\").default|import(\"./Feature.js\").default} feature Feature.\n */\nVectorContext.prototype.drawMultiPolygon = function drawMultiPolygon (multiPolygonGeometry, feature) {};\n\n/**\n * @param {import(\"../geom/Point.js\").default|import(\"./Feature.js\").default} pointGeometry Point geometry.\n * @param {import(\"../Feature.js\").default|import(\"./Feature.js\").default} feature Feature.\n */\nVectorContext.prototype.drawPoint = function drawPoint (pointGeometry, feature) {};\n\n/**\n * @param {import(\"../geom/Polygon.js\").default|import(\"./Feature.js\").default} polygonGeometry Polygon geometry.\n * @param {import(\"../Feature.js\").default|import(\"./Feature.js\").default} feature Feature.\n */\nVectorContext.prototype.drawPolygon = function drawPolygon (polygonGeometry, feature) {};\n\n/**\n * @param {import(\"../geom/Geometry.js\").default|import(\"./Feature.js\").default} geometry Geometry.\n * @param {import(\"../Feature.js\").default|import(\"./Feature.js\").default} feature Feature.\n */\nVectorContext.prototype.drawText = function drawText (geometry, feature) {};\n\n/**\n * @param {import(\"../style/Fill.js\").default} fillStyle Fill style.\n * @param {import(\"../style/Stroke.js\").default} strokeStyle Stroke style.\n */\nVectorContext.prototype.setFillStrokeStyle = function setFillStrokeStyle (fillStyle, strokeStyle) {};\n\n/**\n * @param {import(\"../style/Image.js\").default} imageStyle Image style.\n * @param {import(\"./canvas.js\").DeclutterGroup=} opt_declutterGroup Declutter.\n */\nVectorContext.prototype.setImageStyle = function setImageStyle (imageStyle, opt_declutterGroup) {};\n\n/**\n * @param {import(\"../style/Text.js\").default} textStyle Text style.\n * @param {import(\"./canvas.js\").DeclutterGroup=} opt_declutterGroup Declutter.\n */\nVectorContext.prototype.setTextStyle = function setTextStyle (textStyle, opt_declutterGroup) {};\n\nexport default VectorContext;\n\n//# sourceMappingURL=VectorContext.js.map","/**\n * @module ol/render/canvas/Immediate\n */\n// FIXME test, especially polygons with holes and multipolygons\n// FIXME need to handle large thick features (where pixel size matters)\n// FIXME add offset and end to ol/geom/flat/transform~transform2D?\n\nimport {equals} from '../../array.js';\nimport {asColorLike} from '../../colorlike.js';\nimport {intersects} from '../../extent.js';\nimport GeometryType from '../../geom/GeometryType.js';\nimport {transformGeom2D} from '../../geom/SimpleGeometry.js';\nimport {transform2D} from '../../geom/flat/transform.js';\nimport {CANVAS_LINE_DASH} from '../../has.js';\nimport VectorContext from '../VectorContext.js';\nimport {defaultTextAlign, defaultFillStyle, defaultLineCap, defaultLineDash, defaultLineDashOffset, defaultLineJoin, defaultLineWidth, defaultMiterLimit, defaultStrokeStyle, defaultTextBaseline, defaultFont} from '../canvas.js';\nimport {create as createTransform, compose as composeTransform} from '../../transform.js';\n\n/**\n * @classdesc\n * A concrete subclass of {@link module:ol/render/VectorContext} that implements\n * direct rendering of features and geometries to an HTML5 Canvas context.\n * Instances of this class are created internally by the library and\n * provided to application code as vectorContext member of the\n * {@link module:ol/render/Event~RenderEvent} object associated with postcompose, precompose and\n * render events emitted by layers and maps.\n */\nvar CanvasImmediateRenderer = /*@__PURE__*/(function (VectorContext) {\n  function CanvasImmediateRenderer(context, pixelRatio, extent, transform, viewRotation) {\n    VectorContext.call(this);\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.context_ = context;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.pixelRatio_ = pixelRatio;\n\n    /**\n     * @private\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.extent_ = extent;\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.transform_ = transform;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.viewRotation_ = viewRotation;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").FillState}\n     */\n    this.contextFillState_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").StrokeState}\n     */\n    this.contextStrokeState_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").TextState}\n     */\n    this.contextTextState_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").FillState}\n     */\n    this.fillState_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").StrokeState}\n     */\n    this.strokeState_ = null;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement}\n     */\n    this.image_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageAnchorX_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageAnchorY_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageHeight_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageOpacity_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageOriginX_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageOriginY_ = 0;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.imageRotateWithView_ = false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageRotation_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageScale_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.imageWidth_ = 0;\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.text_ = '';\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textOffsetX_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textOffsetY_ = 0;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.textRotateWithView_ = false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textRotation_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textScale_ = 0;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").FillState}\n     */\n    this.textFillState_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").StrokeState}\n     */\n    this.textStrokeState_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").TextState}\n     */\n    this.textState_ = null;\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.pixelCoordinates_ = [];\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.tmpLocalTransform_ = createTransform();\n\n  }\n\n  if ( VectorContext ) CanvasImmediateRenderer.__proto__ = VectorContext;\n  CanvasImmediateRenderer.prototype = Object.create( VectorContext && VectorContext.prototype );\n  CanvasImmediateRenderer.prototype.constructor = CanvasImmediateRenderer;\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @private\n   */\n  CanvasImmediateRenderer.prototype.drawImages_ = function drawImages_ (flatCoordinates, offset, end, stride) {\n    if (!this.image_) {\n      return;\n    }\n    var pixelCoordinates = transform2D(\n      flatCoordinates, offset, end, 2, this.transform_,\n      this.pixelCoordinates_);\n    var context = this.context_;\n    var localTransform = this.tmpLocalTransform_;\n    var alpha = context.globalAlpha;\n    if (this.imageOpacity_ != 1) {\n      context.globalAlpha = alpha * this.imageOpacity_;\n    }\n    var rotation = this.imageRotation_;\n    if (this.imageRotateWithView_) {\n      rotation += this.viewRotation_;\n    }\n    for (var i = 0, ii = pixelCoordinates.length; i < ii; i += 2) {\n      var x = pixelCoordinates[i] - this.imageAnchorX_;\n      var y = pixelCoordinates[i + 1] - this.imageAnchorY_;\n      if (rotation !== 0 || this.imageScale_ != 1) {\n        var centerX = x + this.imageAnchorX_;\n        var centerY = y + this.imageAnchorY_;\n        composeTransform(localTransform,\n          centerX, centerY,\n          this.imageScale_, this.imageScale_,\n          rotation,\n          -centerX, -centerY);\n        context.setTransform.apply(context, localTransform);\n      }\n      context.drawImage(this.image_, this.imageOriginX_, this.imageOriginY_,\n        this.imageWidth_, this.imageHeight_, x, y,\n        this.imageWidth_, this.imageHeight_);\n    }\n    if (rotation !== 0 || this.imageScale_ != 1) {\n      context.setTransform(1, 0, 0, 1, 0, 0);\n    }\n    if (this.imageOpacity_ != 1) {\n      context.globalAlpha = alpha;\n    }\n  };\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @private\n   */\n  CanvasImmediateRenderer.prototype.drawText_ = function drawText_ (flatCoordinates, offset, end, stride) {\n    if (!this.textState_ || this.text_ === '') {\n      return;\n    }\n    if (this.textFillState_) {\n      this.setContextFillState_(this.textFillState_);\n    }\n    if (this.textStrokeState_) {\n      this.setContextStrokeState_(this.textStrokeState_);\n    }\n    this.setContextTextState_(this.textState_);\n    var pixelCoordinates = transform2D(\n      flatCoordinates, offset, end, stride, this.transform_,\n      this.pixelCoordinates_);\n    var context = this.context_;\n    var rotation = this.textRotation_;\n    if (this.textRotateWithView_) {\n      rotation += this.viewRotation_;\n    }\n    for (; offset < end; offset += stride) {\n      var x = pixelCoordinates[offset] + this.textOffsetX_;\n      var y = pixelCoordinates[offset + 1] + this.textOffsetY_;\n      if (rotation !== 0 || this.textScale_ != 1) {\n        var localTransform = composeTransform(this.tmpLocalTransform_,\n          x, y,\n          this.textScale_, this.textScale_,\n          rotation,\n          -x, -y);\n        context.setTransform.apply(context, localTransform);\n      }\n      if (this.textStrokeState_) {\n        context.strokeText(this.text_, x, y);\n      }\n      if (this.textFillState_) {\n        context.fillText(this.text_, x, y);\n      }\n    }\n    if (rotation !== 0 || this.textScale_ != 1) {\n      context.setTransform(1, 0, 0, 1, 0, 0);\n    }\n  };\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @param {boolean} close Close.\n   * @private\n   * @return {number} end End.\n   */\n  CanvasImmediateRenderer.prototype.moveToLineTo_ = function moveToLineTo_ (flatCoordinates, offset, end, stride, close) {\n    var context = this.context_;\n    var pixelCoordinates = transform2D(\n      flatCoordinates, offset, end, stride, this.transform_,\n      this.pixelCoordinates_);\n    context.moveTo(pixelCoordinates[0], pixelCoordinates[1]);\n    var length = pixelCoordinates.length;\n    if (close) {\n      length -= 2;\n    }\n    for (var i = 2; i < length; i += 2) {\n      context.lineTo(pixelCoordinates[i], pixelCoordinates[i + 1]);\n    }\n    if (close) {\n      context.closePath();\n    }\n    return end;\n  };\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {Array<number>} ends Ends.\n   * @param {number} stride Stride.\n   * @private\n   * @return {number} End.\n   */\n  CanvasImmediateRenderer.prototype.drawRings_ = function drawRings_ (flatCoordinates, offset, ends, stride) {\n    for (var i = 0, ii = ends.length; i < ii; ++i) {\n      offset = this.moveToLineTo_(flatCoordinates, offset, ends[i], stride, true);\n    }\n    return offset;\n  };\n\n  /**\n   * Render a circle geometry into the canvas.  Rendering is immediate and uses\n   * the current fill and stroke styles.\n   *\n   * @param {import(\"../../geom/Circle.js\").default} geometry Circle geometry.\n   * @override\n   * @api\n   */\n  CanvasImmediateRenderer.prototype.drawCircle = function drawCircle (geometry) {\n    if (!intersects(this.extent_, geometry.getExtent())) {\n      return;\n    }\n    if (this.fillState_ || this.strokeState_) {\n      if (this.fillState_) {\n        this.setContextFillState_(this.fillState_);\n      }\n      if (this.strokeState_) {\n        this.setContextStrokeState_(this.strokeState_);\n      }\n      var pixelCoordinates = transformGeom2D(\n        geometry, this.transform_, this.pixelCoordinates_);\n      var dx = pixelCoordinates[2] - pixelCoordinates[0];\n      var dy = pixelCoordinates[3] - pixelCoordinates[1];\n      var radius = Math.sqrt(dx * dx + dy * dy);\n      var context = this.context_;\n      context.beginPath();\n      context.arc(\n        pixelCoordinates[0], pixelCoordinates[1], radius, 0, 2 * Math.PI);\n      if (this.fillState_) {\n        context.fill();\n      }\n      if (this.strokeState_) {\n        context.stroke();\n      }\n    }\n    if (this.text_ !== '') {\n      this.drawText_(geometry.getCenter(), 0, 2, 2);\n    }\n  };\n\n  /**\n   * Set the rendering style.  Note that since this is an immediate rendering API,\n   * any `zIndex` on the provided style will be ignored.\n   *\n   * @param {import(\"../../style/Style.js\").default} style The rendering style.\n   * @override\n   * @api\n   */\n  CanvasImmediateRenderer.prototype.setStyle = function setStyle (style) {\n    this.setFillStrokeStyle(style.getFill(), style.getStroke());\n    this.setImageStyle(style.getImage());\n    this.setTextStyle(style.getText());\n  };\n\n  /**\n   * Render a geometry into the canvas.  Call\n   * {@link module:ol/render/canvas/Immediate#setStyle} first to set the rendering style.\n   *\n   * @param {import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default} geometry The geometry to render.\n   * @override\n   * @api\n   */\n  CanvasImmediateRenderer.prototype.drawGeometry = function drawGeometry (geometry) {\n    var type = geometry.getType();\n    switch (type) {\n      case GeometryType.POINT:\n        this.drawPoint(/** @type {import(\"../../geom/Point.js\").default} */ (geometry));\n        break;\n      case GeometryType.LINE_STRING:\n        this.drawLineString(/** @type {import(\"../../geom/LineString.js\").default} */ (geometry));\n        break;\n      case GeometryType.POLYGON:\n        this.drawPolygon(/** @type {import(\"../../geom/Polygon.js\").default} */ (geometry));\n        break;\n      case GeometryType.MULTI_POINT:\n        this.drawMultiPoint(/** @type {import(\"../../geom/MultiPoint.js\").default} */ (geometry));\n        break;\n      case GeometryType.MULTI_LINE_STRING:\n        this.drawMultiLineString(/** @type {import(\"../../geom/MultiLineString.js\").default} */ (geometry));\n        break;\n      case GeometryType.MULTI_POLYGON:\n        this.drawMultiPolygon(/** @type {import(\"../../geom/MultiPolygon.js\").default} */ (geometry));\n        break;\n      case GeometryType.GEOMETRY_COLLECTION:\n        this.drawGeometryCollection(/** @type {import(\"../../geom/GeometryCollection.js\").default} */ (geometry));\n        break;\n      case GeometryType.CIRCLE:\n        this.drawCircle(/** @type {import(\"../../geom/Circle.js\").default} */ (geometry));\n        break;\n      default:\n    }\n  };\n\n  /**\n   * Render a feature into the canvas.  Note that any `zIndex` on the provided\n   * style will be ignored - features are rendered immediately in the order that\n   * this method is called.  If you need `zIndex` support, you should be using an\n   * {@link module:ol/layer/Vector~VectorLayer} instead.\n   *\n   * @param {import(\"../../Feature.js\").default} feature Feature.\n   * @param {import(\"../../style/Style.js\").default} style Style.\n   * @override\n   * @api\n   */\n  CanvasImmediateRenderer.prototype.drawFeature = function drawFeature (feature, style) {\n    var geometry = style.getGeometryFunction()(feature);\n    if (!geometry || !intersects(this.extent_, geometry.getExtent())) {\n      return;\n    }\n    this.setStyle(style);\n    this.drawGeometry(geometry);\n  };\n\n  /**\n   * Render a GeometryCollection to the canvas.  Rendering is immediate and\n   * uses the current styles appropriate for each geometry in the collection.\n   *\n   * @param {import(\"../../geom/GeometryCollection.js\").default} geometry Geometry collection.\n   * @override\n   */\n  CanvasImmediateRenderer.prototype.drawGeometryCollection = function drawGeometryCollection (geometry) {\n    var geometries = geometry.getGeometriesArray();\n    for (var i = 0, ii = geometries.length; i < ii; ++i) {\n      this.drawGeometry(geometries[i]);\n    }\n  };\n\n  /**\n   * Render a Point geometry into the canvas.  Rendering is immediate and uses\n   * the current style.\n   *\n   * @param {import(\"../../geom/Point.js\").default|import(\"../Feature.js\").default} geometry Point geometry.\n   * @override\n   */\n  CanvasImmediateRenderer.prototype.drawPoint = function drawPoint (geometry) {\n    var flatCoordinates = geometry.getFlatCoordinates();\n    var stride = geometry.getStride();\n    if (this.image_) {\n      this.drawImages_(flatCoordinates, 0, flatCoordinates.length, stride);\n    }\n    if (this.text_ !== '') {\n      this.drawText_(flatCoordinates, 0, flatCoordinates.length, stride);\n    }\n  };\n\n  /**\n   * Render a MultiPoint geometry  into the canvas.  Rendering is immediate and\n   * uses the current style.\n   *\n   * @param {import(\"../../geom/MultiPoint.js\").default|import(\"../Feature.js\").default} geometry MultiPoint geometry.\n   * @override\n   */\n  CanvasImmediateRenderer.prototype.drawMultiPoint = function drawMultiPoint (geometry) {\n    var flatCoordinates = geometry.getFlatCoordinates();\n    var stride = geometry.getStride();\n    if (this.image_) {\n      this.drawImages_(flatCoordinates, 0, flatCoordinates.length, stride);\n    }\n    if (this.text_ !== '') {\n      this.drawText_(flatCoordinates, 0, flatCoordinates.length, stride);\n    }\n  };\n\n  /**\n   * Render a LineString into the canvas.  Rendering is immediate and uses\n   * the current style.\n   *\n   * @param {import(\"../../geom/LineString.js\").default|import(\"../Feature.js\").default} geometry LineString geometry.\n   * @override\n   */\n  CanvasImmediateRenderer.prototype.drawLineString = function drawLineString (geometry) {\n    if (!intersects(this.extent_, geometry.getExtent())) {\n      return;\n    }\n    if (this.strokeState_) {\n      this.setContextStrokeState_(this.strokeState_);\n      var context = this.context_;\n      var flatCoordinates = geometry.getFlatCoordinates();\n      context.beginPath();\n      this.moveToLineTo_(flatCoordinates, 0, flatCoordinates.length,\n        geometry.getStride(), false);\n      context.stroke();\n    }\n    if (this.text_ !== '') {\n      var flatMidpoint = geometry.getFlatMidpoint();\n      this.drawText_(flatMidpoint, 0, 2, 2);\n    }\n  };\n\n  /**\n   * Render a MultiLineString geometry into the canvas.  Rendering is immediate\n   * and uses the current style.\n   *\n   * @param {import(\"../../geom/MultiLineString.js\").default|import(\"../Feature.js\").default} geometry MultiLineString geometry.\n   * @override\n   */\n  CanvasImmediateRenderer.prototype.drawMultiLineString = function drawMultiLineString (geometry) {\n    var geometryExtent = geometry.getExtent();\n    if (!intersects(this.extent_, geometryExtent)) {\n      return;\n    }\n    if (this.strokeState_) {\n      this.setContextStrokeState_(this.strokeState_);\n      var context = this.context_;\n      var flatCoordinates = geometry.getFlatCoordinates();\n      var offset = 0;\n      var ends = /** @type {Array<number>} */ (geometry.getEnds());\n      var stride = geometry.getStride();\n      context.beginPath();\n      for (var i = 0, ii = ends.length; i < ii; ++i) {\n        offset = this.moveToLineTo_(flatCoordinates, offset, ends[i], stride, false);\n      }\n      context.stroke();\n    }\n    if (this.text_ !== '') {\n      var flatMidpoints = geometry.getFlatMidpoints();\n      this.drawText_(flatMidpoints, 0, flatMidpoints.length, 2);\n    }\n  };\n\n  /**\n   * Render a Polygon geometry into the canvas.  Rendering is immediate and uses\n   * the current style.\n   *\n   * @param {import(\"../../geom/Polygon.js\").default|import(\"../Feature.js\").default} geometry Polygon geometry.\n   * @override\n   */\n  CanvasImmediateRenderer.prototype.drawPolygon = function drawPolygon (geometry) {\n    if (!intersects(this.extent_, geometry.getExtent())) {\n      return;\n    }\n    if (this.strokeState_ || this.fillState_) {\n      if (this.fillState_) {\n        this.setContextFillState_(this.fillState_);\n      }\n      if (this.strokeState_) {\n        this.setContextStrokeState_(this.strokeState_);\n      }\n      var context = this.context_;\n      context.beginPath();\n      this.drawRings_(geometry.getOrientedFlatCoordinates(),\n        0, /** @type {Array<number>} */ (geometry.getEnds()), geometry.getStride());\n      if (this.fillState_) {\n        context.fill();\n      }\n      if (this.strokeState_) {\n        context.stroke();\n      }\n    }\n    if (this.text_ !== '') {\n      var flatInteriorPoint = geometry.getFlatInteriorPoint();\n      this.drawText_(flatInteriorPoint, 0, 2, 2);\n    }\n  };\n\n  /**\n   * Render MultiPolygon geometry into the canvas.  Rendering is immediate and\n   * uses the current style.\n   * @param {import(\"../../geom/MultiPolygon.js\").default} geometry MultiPolygon geometry.\n   * @override\n   */\n  CanvasImmediateRenderer.prototype.drawMultiPolygon = function drawMultiPolygon (geometry) {\n    if (!intersects(this.extent_, geometry.getExtent())) {\n      return;\n    }\n    if (this.strokeState_ || this.fillState_) {\n      if (this.fillState_) {\n        this.setContextFillState_(this.fillState_);\n      }\n      if (this.strokeState_) {\n        this.setContextStrokeState_(this.strokeState_);\n      }\n      var context = this.context_;\n      var flatCoordinates = geometry.getOrientedFlatCoordinates();\n      var offset = 0;\n      var endss = geometry.getEndss();\n      var stride = geometry.getStride();\n      context.beginPath();\n      for (var i = 0, ii = endss.length; i < ii; ++i) {\n        var ends = endss[i];\n        offset = this.drawRings_(flatCoordinates, offset, ends, stride);\n      }\n      if (this.fillState_) {\n        context.fill();\n      }\n      if (this.strokeState_) {\n        context.stroke();\n      }\n    }\n    if (this.text_ !== '') {\n      var flatInteriorPoints = geometry.getFlatInteriorPoints();\n      this.drawText_(flatInteriorPoints, 0, flatInteriorPoints.length, 2);\n    }\n  };\n\n  /**\n   * @param {import(\"../canvas.js\").FillState} fillState Fill state.\n   * @private\n   */\n  CanvasImmediateRenderer.prototype.setContextFillState_ = function setContextFillState_ (fillState) {\n    var context = this.context_;\n    var contextFillState = this.contextFillState_;\n    if (!contextFillState) {\n      context.fillStyle = fillState.fillStyle;\n      this.contextFillState_ = {\n        fillStyle: fillState.fillStyle\n      };\n    } else {\n      if (contextFillState.fillStyle != fillState.fillStyle) {\n        contextFillState.fillStyle = context.fillStyle = fillState.fillStyle;\n      }\n    }\n  };\n\n  /**\n   * @param {import(\"../canvas.js\").StrokeState} strokeState Stroke state.\n   * @private\n   */\n  CanvasImmediateRenderer.prototype.setContextStrokeState_ = function setContextStrokeState_ (strokeState) {\n    var context = this.context_;\n    var contextStrokeState = this.contextStrokeState_;\n    if (!contextStrokeState) {\n      context.lineCap = /** @type {CanvasLineCap} */ (strokeState.lineCap);\n      if (CANVAS_LINE_DASH) {\n        context.setLineDash(strokeState.lineDash);\n        context.lineDashOffset = strokeState.lineDashOffset;\n      }\n      context.lineJoin = /** @type {CanvasLineJoin} */ (strokeState.lineJoin);\n      context.lineWidth = strokeState.lineWidth;\n      context.miterLimit = strokeState.miterLimit;\n      context.strokeStyle = strokeState.strokeStyle;\n      this.contextStrokeState_ = {\n        lineCap: strokeState.lineCap,\n        lineDash: strokeState.lineDash,\n        lineDashOffset: strokeState.lineDashOffset,\n        lineJoin: strokeState.lineJoin,\n        lineWidth: strokeState.lineWidth,\n        miterLimit: strokeState.miterLimit,\n        strokeStyle: strokeState.strokeStyle\n      };\n    } else {\n      if (contextStrokeState.lineCap != strokeState.lineCap) {\n        contextStrokeState.lineCap = context.lineCap = /** @type {CanvasLineCap} */ (strokeState.lineCap);\n      }\n      if (CANVAS_LINE_DASH) {\n        if (!equals(contextStrokeState.lineDash, strokeState.lineDash)) {\n          context.setLineDash(contextStrokeState.lineDash = strokeState.lineDash);\n        }\n        if (contextStrokeState.lineDashOffset != strokeState.lineDashOffset) {\n          contextStrokeState.lineDashOffset = context.lineDashOffset =\n              strokeState.lineDashOffset;\n        }\n      }\n      if (contextStrokeState.lineJoin != strokeState.lineJoin) {\n        contextStrokeState.lineJoin = context.lineJoin = /** @type {CanvasLineJoin} */ (strokeState.lineJoin);\n      }\n      if (contextStrokeState.lineWidth != strokeState.lineWidth) {\n        contextStrokeState.lineWidth = context.lineWidth = strokeState.lineWidth;\n      }\n      if (contextStrokeState.miterLimit != strokeState.miterLimit) {\n        contextStrokeState.miterLimit = context.miterLimit =\n            strokeState.miterLimit;\n      }\n      if (contextStrokeState.strokeStyle != strokeState.strokeStyle) {\n        contextStrokeState.strokeStyle = context.strokeStyle =\n            strokeState.strokeStyle;\n      }\n    }\n  };\n\n  /**\n   * @param {import(\"../canvas.js\").TextState} textState Text state.\n   * @private\n   */\n  CanvasImmediateRenderer.prototype.setContextTextState_ = function setContextTextState_ (textState) {\n    var context = this.context_;\n    var contextTextState = this.contextTextState_;\n    var textAlign = textState.textAlign ?\n      textState.textAlign : defaultTextAlign;\n    if (!contextTextState) {\n      context.font = textState.font;\n      context.textAlign = /** @type {CanvasTextAlign} */ (textAlign);\n      context.textBaseline = /** @type {CanvasTextBaseline} */ (textState.textBaseline);\n      this.contextTextState_ = {\n        font: textState.font,\n        textAlign: textAlign,\n        textBaseline: textState.textBaseline\n      };\n    } else {\n      if (contextTextState.font != textState.font) {\n        contextTextState.font = context.font = textState.font;\n      }\n      if (contextTextState.textAlign != textAlign) {\n        contextTextState.textAlign = context.textAlign = /** @type {CanvasTextAlign} */ (textAlign);\n      }\n      if (contextTextState.textBaseline != textState.textBaseline) {\n        contextTextState.textBaseline = context.textBaseline =\n          /** @type {CanvasTextBaseline} */ (textState.textBaseline);\n      }\n    }\n  };\n\n  /**\n   * Set the fill and stroke style for subsequent draw operations.  To clear\n   * either fill or stroke styles, pass null for the appropriate parameter.\n   *\n   * @param {import(\"../../style/Fill.js\").default} fillStyle Fill style.\n   * @param {import(\"../../style/Stroke.js\").default} strokeStyle Stroke style.\n   * @override\n   */\n  CanvasImmediateRenderer.prototype.setFillStrokeStyle = function setFillStrokeStyle (fillStyle, strokeStyle) {\n    if (!fillStyle) {\n      this.fillState_ = null;\n    } else {\n      var fillStyleColor = fillStyle.getColor();\n      this.fillState_ = {\n        fillStyle: asColorLike(fillStyleColor ?\n          fillStyleColor : defaultFillStyle)\n      };\n    }\n    if (!strokeStyle) {\n      this.strokeState_ = null;\n    } else {\n      var strokeStyleColor = strokeStyle.getColor();\n      var strokeStyleLineCap = strokeStyle.getLineCap();\n      var strokeStyleLineDash = strokeStyle.getLineDash();\n      var strokeStyleLineDashOffset = strokeStyle.getLineDashOffset();\n      var strokeStyleLineJoin = strokeStyle.getLineJoin();\n      var strokeStyleWidth = strokeStyle.getWidth();\n      var strokeStyleMiterLimit = strokeStyle.getMiterLimit();\n      this.strokeState_ = {\n        lineCap: strokeStyleLineCap !== undefined ?\n          strokeStyleLineCap : defaultLineCap,\n        lineDash: strokeStyleLineDash ?\n          strokeStyleLineDash : defaultLineDash,\n        lineDashOffset: strokeStyleLineDashOffset ?\n          strokeStyleLineDashOffset : defaultLineDashOffset,\n        lineJoin: strokeStyleLineJoin !== undefined ?\n          strokeStyleLineJoin : defaultLineJoin,\n        lineWidth: this.pixelRatio_ * (strokeStyleWidth !== undefined ?\n          strokeStyleWidth : defaultLineWidth),\n        miterLimit: strokeStyleMiterLimit !== undefined ?\n          strokeStyleMiterLimit : defaultMiterLimit,\n        strokeStyle: asColorLike(strokeStyleColor ?\n          strokeStyleColor : defaultStrokeStyle)\n      };\n    }\n  };\n\n  /**\n   * Set the image style for subsequent draw operations.  Pass null to remove\n   * the image style.\n   *\n   * @param {import(\"../../style/Image.js\").default} imageStyle Image style.\n   * @override\n   */\n  CanvasImmediateRenderer.prototype.setImageStyle = function setImageStyle (imageStyle) {\n    if (!imageStyle) {\n      this.image_ = null;\n    } else {\n      var imageAnchor = imageStyle.getAnchor();\n      // FIXME pixel ratio\n      var imageImage = imageStyle.getImage(1);\n      var imageOrigin = imageStyle.getOrigin();\n      var imageSize = imageStyle.getSize();\n      this.imageAnchorX_ = imageAnchor[0];\n      this.imageAnchorY_ = imageAnchor[1];\n      this.imageHeight_ = imageSize[1];\n      this.image_ = imageImage;\n      this.imageOpacity_ = imageStyle.getOpacity();\n      this.imageOriginX_ = imageOrigin[0];\n      this.imageOriginY_ = imageOrigin[1];\n      this.imageRotateWithView_ = imageStyle.getRotateWithView();\n      this.imageRotation_ = imageStyle.getRotation();\n      this.imageScale_ = imageStyle.getScale() * this.pixelRatio_;\n      this.imageWidth_ = imageSize[0];\n    }\n  };\n\n  /**\n   * Set the text style for subsequent draw operations.  Pass null to\n   * remove the text style.\n   *\n   * @param {import(\"../../style/Text.js\").default} textStyle Text style.\n   * @override\n   */\n  CanvasImmediateRenderer.prototype.setTextStyle = function setTextStyle (textStyle) {\n    if (!textStyle) {\n      this.text_ = '';\n    } else {\n      var textFillStyle = textStyle.getFill();\n      if (!textFillStyle) {\n        this.textFillState_ = null;\n      } else {\n        var textFillStyleColor = textFillStyle.getColor();\n        this.textFillState_ = {\n          fillStyle: asColorLike(textFillStyleColor ?\n            textFillStyleColor : defaultFillStyle)\n        };\n      }\n      var textStrokeStyle = textStyle.getStroke();\n      if (!textStrokeStyle) {\n        this.textStrokeState_ = null;\n      } else {\n        var textStrokeStyleColor = textStrokeStyle.getColor();\n        var textStrokeStyleLineCap = textStrokeStyle.getLineCap();\n        var textStrokeStyleLineDash = textStrokeStyle.getLineDash();\n        var textStrokeStyleLineDashOffset = textStrokeStyle.getLineDashOffset();\n        var textStrokeStyleLineJoin = textStrokeStyle.getLineJoin();\n        var textStrokeStyleWidth = textStrokeStyle.getWidth();\n        var textStrokeStyleMiterLimit = textStrokeStyle.getMiterLimit();\n        this.textStrokeState_ = {\n          lineCap: textStrokeStyleLineCap !== undefined ?\n            textStrokeStyleLineCap : defaultLineCap,\n          lineDash: textStrokeStyleLineDash ?\n            textStrokeStyleLineDash : defaultLineDash,\n          lineDashOffset: textStrokeStyleLineDashOffset ?\n            textStrokeStyleLineDashOffset : defaultLineDashOffset,\n          lineJoin: textStrokeStyleLineJoin !== undefined ?\n            textStrokeStyleLineJoin : defaultLineJoin,\n          lineWidth: textStrokeStyleWidth !== undefined ?\n            textStrokeStyleWidth : defaultLineWidth,\n          miterLimit: textStrokeStyleMiterLimit !== undefined ?\n            textStrokeStyleMiterLimit : defaultMiterLimit,\n          strokeStyle: asColorLike(textStrokeStyleColor ?\n            textStrokeStyleColor : defaultStrokeStyle)\n        };\n      }\n      var textFont = textStyle.getFont();\n      var textOffsetX = textStyle.getOffsetX();\n      var textOffsetY = textStyle.getOffsetY();\n      var textRotateWithView = textStyle.getRotateWithView();\n      var textRotation = textStyle.getRotation();\n      var textScale = textStyle.getScale();\n      var textText = textStyle.getText();\n      var textTextAlign = textStyle.getTextAlign();\n      var textTextBaseline = textStyle.getTextBaseline();\n      this.textState_ = {\n        font: textFont !== undefined ?\n          textFont : defaultFont,\n        textAlign: textTextAlign !== undefined ?\n          textTextAlign : defaultTextAlign,\n        textBaseline: textTextBaseline !== undefined ?\n          textTextBaseline : defaultTextBaseline\n      };\n      this.text_ = textText !== undefined ? textText : '';\n      this.textOffsetX_ =\n          textOffsetX !== undefined ? (this.pixelRatio_ * textOffsetX) : 0;\n      this.textOffsetY_ =\n          textOffsetY !== undefined ? (this.pixelRatio_ * textOffsetY) : 0;\n      this.textRotateWithView_ = textRotateWithView !== undefined ? textRotateWithView : false;\n      this.textRotation_ = textRotation !== undefined ? textRotation : 0;\n      this.textScale_ = this.pixelRatio_ * (textScale !== undefined ?\n        textScale : 1);\n    }\n  };\n\n  return CanvasImmediateRenderer;\n}(VectorContext));\n\n\nexport default CanvasImmediateRenderer;\n\n//# sourceMappingURL=Immediate.js.map","/**\n * @module ol/style/IconImageCache\n */\nimport {asString} from '../color.js';\n\n/**\n * @classdesc\n * Singleton class. Available through {@link module:ol/style/IconImageCache~shared}.\n */\nvar IconImageCache = function IconImageCache() {\n\n  /**\n  * @type {!Object<string, import(\"./IconImage.js\").default>}\n  * @private\n  */\n  this.cache_ = {};\n\n  /**\n  * @type {number}\n  * @private\n  */\n  this.cacheSize_ = 0;\n\n  /**\n  * @type {number}\n  * @private\n  */\n  this.maxCacheSize_ = 32;\n};\n\n/**\n* FIXME empty description for jsdoc\n*/\nIconImageCache.prototype.clear = function clear () {\n  this.cache_ = {};\n  this.cacheSize_ = 0;\n};\n\n/**\n* FIXME empty description for jsdoc\n*/\nIconImageCache.prototype.expire = function expire () {\n  if (this.cacheSize_ > this.maxCacheSize_) {\n    var i = 0;\n    for (var key in this.cache_) {\n      var iconImage = this.cache_[key];\n      if ((i++ & 3) === 0 && !iconImage.hasListener()) {\n        delete this.cache_[key];\n        --this.cacheSize_;\n      }\n    }\n  }\n};\n\n/**\n* @param {string} src Src.\n* @param {?string} crossOrigin Cross origin.\n* @param {import(\"../color.js\").Color} color Color.\n* @return {import(\"./IconImage.js\").default} Icon image.\n*/\nIconImageCache.prototype.get = function get (src, crossOrigin, color) {\n  var key = getKey(src, crossOrigin, color);\n  return key in this.cache_ ? this.cache_[key] : null;\n};\n\n/**\n* @param {string} src Src.\n* @param {?string} crossOrigin Cross origin.\n* @param {import(\"../color.js\").Color} color Color.\n* @param {import(\"./IconImage.js\").default} iconImage Icon image.\n*/\nIconImageCache.prototype.set = function set (src, crossOrigin, color, iconImage) {\n  var key = getKey(src, crossOrigin, color);\n  this.cache_[key] = iconImage;\n  ++this.cacheSize_;\n};\n\n/**\n* Set the cache size of the icon cache. Default is `32`. Change this value when\n* your map uses more than 32 different icon images and you are not caching icon\n* styles on the application level.\n* @param {number} maxCacheSize Cache max size.\n* @api\n*/\nIconImageCache.prototype.setSize = function setSize (maxCacheSize) {\n  this.maxCacheSize_ = maxCacheSize;\n  this.expire();\n};\n\n\n/**\n * @param {string} src Src.\n * @param {?string} crossOrigin Cross origin.\n * @param {import(\"../color.js\").Color} color Color.\n * @return {string} Cache key.\n */\nfunction getKey(src, crossOrigin, color) {\n  var colorString = color ? asString(color) : 'null';\n  return crossOrigin + ':' + src + ':' + colorString;\n}\n\n\nexport default IconImageCache;\n\n\n/**\n * The {@link module:ol/style/IconImageCache~IconImageCache} for\n * {@link module:ol/style/Icon~Icon} images.\n * @api\n */\nexport var shared = new IconImageCache();\n\n//# sourceMappingURL=IconImageCache.js.map","/**\n * @module ol/renderer/Map\n */\nimport {abstract, getUid} from '../util.js';\nimport Disposable from '../Disposable.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {getWidth} from '../extent.js';\nimport {TRUE} from '../functions.js';\nimport {visibleAtResolution} from '../layer/Layer.js';\nimport {shared as iconImageCache} from '../style/IconImageCache.js';\nimport {compose as composeTransform, invert as invertTransform, setFromArray as transformSetFromArray} from '../transform.js';\n\n/**\n * @abstract\n */\nvar MapRenderer = /*@__PURE__*/(function (Disposable) {\n  function MapRenderer(map) {\n    Disposable.call(this);\n\n    /**\n     * @private\n     * @type {import(\"../PluggableMap.js\").default}\n     */\n    this.map_ = map;\n\n    /**\n     * @private\n     * @type {!Object<string, import(\"./Layer.js\").default>}\n     */\n    this.layerRenderers_ = {};\n\n    /**\n     * @private\n     * @type {Object<string, import(\"../events.js\").EventsKey>}\n     */\n    this.layerRendererListeners_ = {};\n\n    /**\n     * @private\n     * @type {Array<typeof import(\"./Layer.js\").default>}\n     */\n    this.layerRendererConstructors_ = [];\n\n  }\n\n  if ( Disposable ) MapRenderer.__proto__ = Disposable;\n  MapRenderer.prototype = Object.create( Disposable && Disposable.prototype );\n  MapRenderer.prototype.constructor = MapRenderer;\n\n  /**\n   * @abstract\n   * @param {import(\"../render/EventType.js\").default} type Event type.\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   */\n  MapRenderer.prototype.dispatchRenderEvent = function dispatchRenderEvent (type, frameState) {\n    abstract();\n  };\n\n  /**\n   * Register layer renderer constructors.\n   * @param {Array<typeof import(\"./Layer.js\").default>} constructors Layer renderers.\n   */\n  MapRenderer.prototype.registerLayerRenderers = function registerLayerRenderers (constructors) {\n    this.layerRendererConstructors_.push.apply(this.layerRendererConstructors_, constructors);\n  };\n\n  /**\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState FrameState.\n   * @protected\n   */\n  MapRenderer.prototype.calculateMatrices2D = function calculateMatrices2D (frameState) {\n    var viewState = frameState.viewState;\n    var coordinateToPixelTransform = frameState.coordinateToPixelTransform;\n    var pixelToCoordinateTransform = frameState.pixelToCoordinateTransform;\n\n    composeTransform(coordinateToPixelTransform,\n      frameState.size[0] / 2, frameState.size[1] / 2,\n      1 / viewState.resolution, -1 / viewState.resolution,\n      -viewState.rotation,\n      -viewState.center[0], -viewState.center[1]);\n\n    invertTransform(\n      transformSetFromArray(pixelToCoordinateTransform, coordinateToPixelTransform));\n  };\n\n  /**\n   * Removes all layer renderers.\n   */\n  MapRenderer.prototype.removeLayerRenderers = function removeLayerRenderers () {\n    for (var key in this.layerRenderers_) {\n      this.removeLayerRendererByKey_(key).dispose();\n    }\n  };\n\n  /**\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState FrameState.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {function(this: S, import(\"../Feature.js\").FeatureLike,\n   *     import(\"../layer/Layer.js\").default): T} callback Feature callback.\n   * @param {S} thisArg Value to use as `this` when executing `callback`.\n   * @param {function(this: U, import(\"../layer/Layer.js\").default): boolean} layerFilter Layer filter\n   *     function, only layers which are visible and for which this function\n   *     returns `true` will be tested for features.  By default, all visible\n   *     layers will be tested.\n   * @param {U} thisArg2 Value to use as `this` when executing `layerFilter`.\n   * @return {T|undefined} Callback result.\n   * @template S,T,U\n   */\n  MapRenderer.prototype.forEachFeatureAtCoordinate = function forEachFeatureAtCoordinate (\n    coordinate,\n    frameState,\n    hitTolerance,\n    callback,\n    thisArg,\n    layerFilter,\n    thisArg2\n  ) {\n    var result;\n    var viewState = frameState.viewState;\n    var viewResolution = viewState.resolution;\n\n    /**\n     * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n     * @param {import(\"../layer/Layer.js\").default} layer Layer.\n     * @return {?} Callback result.\n     */\n    function forEachFeatureAtCoordinate(feature, layer) {\n      var managed = frameState.layerStates[getUid(layer)].managed;\n      if (!(getUid(feature) in frameState.skippedFeatureUids && !managed)) {\n        return callback.call(thisArg, feature, managed ? layer : null);\n      }\n    }\n\n    var projection = viewState.projection;\n\n    var translatedCoordinate = coordinate;\n    if (projection.canWrapX()) {\n      var projectionExtent = projection.getExtent();\n      var worldWidth = getWidth(projectionExtent);\n      var x = coordinate[0];\n      if (x < projectionExtent[0] || x > projectionExtent[2]) {\n        var worldsAway = Math.ceil((projectionExtent[0] - x) / worldWidth);\n        translatedCoordinate = [x + worldWidth * worldsAway, coordinate[1]];\n      }\n    }\n\n    var layerStates = frameState.layerStatesArray;\n    var numLayers = layerStates.length;\n    var i;\n    for (i = numLayers - 1; i >= 0; --i) {\n      var layerState = layerStates[i];\n      var layer = layerState.layer;\n      if (visibleAtResolution(layerState, viewResolution) && layerFilter.call(thisArg2, layer)) {\n        var layerRenderer = this.getLayerRenderer(layer);\n        var source = /** @type {import(\"../layer/Layer.js\").default} */ (layer).getSource();\n        if (source) {\n          result = layerRenderer.forEachFeatureAtCoordinate(\n            source.getWrapX() ? translatedCoordinate : coordinate,\n            frameState, hitTolerance, forEachFeatureAtCoordinate);\n        }\n        if (result) {\n          return result;\n        }\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * @abstract\n   * @param {import(\"../pixel.js\").Pixel} pixel Pixel.\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState FrameState.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {function(this: S, import(\"../layer/Layer.js\").default, (Uint8ClampedArray|Uint8Array)): T} callback Layer\n   *     callback.\n   * @param {S} thisArg Value to use as `this` when executing `callback`.\n   * @param {function(this: U, import(\"../layer/Layer.js\").default): boolean} layerFilter Layer filter\n   *     function, only layers which are visible and for which this function\n   *     returns `true` will be tested for features.  By default, all visible\n   *     layers will be tested.\n   * @param {U} thisArg2 Value to use as `this` when executing `layerFilter`.\n   * @return {T|undefined} Callback result.\n   * @template S,T,U\n   */\n  MapRenderer.prototype.forEachLayerAtPixel = function forEachLayerAtPixel (pixel, frameState, hitTolerance, callback, thisArg, layerFilter, thisArg2) {\n    return abstract();\n  };\n\n  /**\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState FrameState.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {function(this: U, import(\"../layer/Layer.js\").default): boolean} layerFilter Layer filter\n   *     function, only layers which are visible and for which this function\n   *     returns `true` will be tested for features.  By default, all visible\n   *     layers will be tested.\n   * @param {U} thisArg Value to use as `this` when executing `layerFilter`.\n   * @return {boolean} Is there a feature at the given coordinate?\n   * @template U\n   */\n  MapRenderer.prototype.hasFeatureAtCoordinate = function hasFeatureAtCoordinate (coordinate, frameState, hitTolerance, layerFilter, thisArg) {\n    var hasFeature = this.forEachFeatureAtCoordinate(\n      coordinate, frameState, hitTolerance, TRUE, this, layerFilter, thisArg);\n\n    return hasFeature !== undefined;\n  };\n\n  /**\n   * @param {import(\"../layer/Base.js\").default} layer Layer.\n   * @protected\n   * @return {import(\"./Layer.js\").default} Layer renderer.\n   */\n  MapRenderer.prototype.getLayerRenderer = function getLayerRenderer (layer) {\n    var layerKey = getUid(layer);\n    if (layerKey in this.layerRenderers_) {\n      return this.layerRenderers_[layerKey];\n    } else {\n      var renderer;\n      for (var i = 0, ii = this.layerRendererConstructors_.length; i < ii; ++i) {\n        var candidate = this.layerRendererConstructors_[i];\n        if (candidate['handles'](layer)) {\n          renderer = candidate['create'](this, layer);\n          break;\n        }\n      }\n      if (renderer) {\n        this.layerRenderers_[layerKey] = renderer;\n        this.layerRendererListeners_[layerKey] = listen(renderer,\n          EventType.CHANGE, this.handleLayerRendererChange_, this);\n      } else {\n        throw new Error('Unable to create renderer for layer: ' + layer.getType());\n      }\n      return renderer;\n    }\n  };\n\n  /**\n   * @param {string} layerKey Layer key.\n   * @protected\n   * @return {import(\"./Layer.js\").default} Layer renderer.\n   */\n  MapRenderer.prototype.getLayerRendererByKey = function getLayerRendererByKey (layerKey) {\n    return this.layerRenderers_[layerKey];\n  };\n\n  /**\n   * @protected\n   * @return {Object<string, import(\"./Layer.js\").default>} Layer renderers.\n   */\n  MapRenderer.prototype.getLayerRenderers = function getLayerRenderers () {\n    return this.layerRenderers_;\n  };\n\n  /**\n   * @return {import(\"../PluggableMap.js\").default} Map.\n   */\n  MapRenderer.prototype.getMap = function getMap () {\n    return this.map_;\n  };\n\n  /**\n   * Handle changes in a layer renderer.\n   * @private\n   */\n  MapRenderer.prototype.handleLayerRendererChange_ = function handleLayerRendererChange_ () {\n    this.map_.render();\n  };\n\n  /**\n   * @param {string} layerKey Layer key.\n   * @return {import(\"./Layer.js\").default} Layer renderer.\n   * @private\n   */\n  MapRenderer.prototype.removeLayerRendererByKey_ = function removeLayerRendererByKey_ (layerKey) {\n    var layerRenderer = this.layerRenderers_[layerKey];\n    delete this.layerRenderers_[layerKey];\n\n    unlistenByKey(this.layerRendererListeners_[layerKey]);\n    delete this.layerRendererListeners_[layerKey];\n\n    return layerRenderer;\n  };\n\n  /**\n   * @param {import(\"../PluggableMap.js\").default} map Map.\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   * @private\n   */\n  MapRenderer.prototype.removeUnusedLayerRenderers_ = function removeUnusedLayerRenderers_ (map, frameState) {\n    for (var layerKey in this.layerRenderers_) {\n      if (!frameState || !(layerKey in frameState.layerStates)) {\n        this.removeLayerRendererByKey_(layerKey).dispose();\n      }\n    }\n  };\n\n  /**\n   * Render.\n   * @abstract\n   * @param {?import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   */\n  MapRenderer.prototype.renderFrame = function renderFrame (frameState) {\n    abstract();\n  };\n\n  /**\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   * @protected\n   */\n  MapRenderer.prototype.scheduleExpireIconCache = function scheduleExpireIconCache (frameState) {\n    frameState.postRenderFunctions.push(/** @type {import(\"../PluggableMap.js\").PostRenderFunction} */ (expireIconCache));\n  };\n\n  /**\n   * @param {!import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   * @protected\n   */\n  MapRenderer.prototype.scheduleRemoveUnusedLayerRenderers = function scheduleRemoveUnusedLayerRenderers (frameState) {\n    for (var layerKey in this.layerRenderers_) {\n      if (!(layerKey in frameState.layerStates)) {\n        frameState.postRenderFunctions.push(\n          /** @type {import(\"../PluggableMap.js\").PostRenderFunction} */ (this.removeUnusedLayerRenderers_.bind(this))\n        );\n        return;\n      }\n    }\n  };\n\n  return MapRenderer;\n}(Disposable));\n\n\n/**\n * @param {import(\"../PluggableMap.js\").default} map Map.\n * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n */\nfunction expireIconCache(map, frameState) {\n  iconImageCache.expire();\n}\n\n\n/**\n * @param {import(\"../layer/Layer.js\").State} state1 First layer state.\n * @param {import(\"../layer/Layer.js\").State} state2 Second layer state.\n * @return {number} The zIndex difference.\n */\nexport function sortByZIndex(state1, state2) {\n  return state1.zIndex - state2.zIndex;\n}\nexport default MapRenderer;\n\n//# sourceMappingURL=Map.js.map","/**\n * @module ol/renderer/canvas/Map\n */\nimport {create as createTransform, apply as applyTransform, compose as composeTransform} from '../../transform.js';\nimport {includes, stableSort} from '../../array.js';\nimport {CLASS_UNSELECTABLE} from '../../css.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {visibleAtResolution} from '../../layer/Layer.js';\nimport RenderEvent from '../../render/Event.js';\nimport RenderEventType from '../../render/EventType.js';\nimport {rotateAtOffset} from '../../render/canvas.js';\nimport CanvasImmediateRenderer from '../../render/canvas/Immediate.js';\nimport MapRenderer, {sortByZIndex} from '../Map.js';\nimport SourceState from '../../source/State.js';\n\n\n/**\n * @type {Array<typeof import(\"../Layer.js\").default>}\n */\nexport var layerRendererConstructors = [];\n\n/**\n * @classdesc\n * Canvas map renderer.\n * @api\n */\nvar CanvasMapRenderer = /*@__PURE__*/(function (MapRenderer) {\n  function CanvasMapRenderer(map) {\n    MapRenderer.call(this, map);\n\n    var container = map.getViewport();\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.context_ = createCanvasContext2D();\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.canvas_ = this.context_.canvas;\n\n    this.canvas_.style.width = '100%';\n    this.canvas_.style.height = '100%';\n    this.canvas_.style.display = 'block';\n    this.canvas_.className = CLASS_UNSELECTABLE;\n    container.insertBefore(this.canvas_, container.childNodes[0] || null);\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.renderedVisible_ = true;\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.transform_ = createTransform();\n\n  }\n\n  if ( MapRenderer ) CanvasMapRenderer.__proto__ = MapRenderer;\n  CanvasMapRenderer.prototype = Object.create( MapRenderer && MapRenderer.prototype );\n  CanvasMapRenderer.prototype.constructor = CanvasMapRenderer;\n\n  /**\n   * @param {import(\"../../render/EventType.js\").default} type Event type.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   */\n  CanvasMapRenderer.prototype.dispatchRenderEvent = function dispatchRenderEvent (type, frameState) {\n    var map = this.getMap();\n    var context = this.context_;\n    if (map.hasListener(type)) {\n      var extent = frameState.extent;\n      var pixelRatio = frameState.pixelRatio;\n      var viewState = frameState.viewState;\n      var rotation = viewState.rotation;\n\n      var transform = this.getTransform(frameState);\n\n      var vectorContext = new CanvasImmediateRenderer(context, pixelRatio,\n        extent, transform, rotation);\n      var composeEvent = new RenderEvent(type, vectorContext,\n        frameState, context, null);\n      map.dispatchEvent(composeEvent);\n    }\n  };\n\n  /**\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @protected\n   * @return {!import(\"../../transform.js\").Transform} Transform.\n   */\n  CanvasMapRenderer.prototype.getTransform = function getTransform (frameState) {\n    var viewState = frameState.viewState;\n    var dx1 = this.canvas_.width / 2;\n    var dy1 = this.canvas_.height / 2;\n    var sx = frameState.pixelRatio / viewState.resolution;\n    var sy = -sx;\n    var angle = -viewState.rotation;\n    var dx2 = -viewState.center[0];\n    var dy2 = -viewState.center[1];\n    return composeTransform(this.transform_, dx1, dy1, sx, sy, angle, dx2, dy2);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasMapRenderer.prototype.renderFrame = function renderFrame (frameState) {\n\n    if (!frameState) {\n      if (this.renderedVisible_) {\n        this.canvas_.style.display = 'none';\n        this.renderedVisible_ = false;\n      }\n      return;\n    }\n\n    var context = this.context_;\n    var pixelRatio = frameState.pixelRatio;\n    var width = Math.round(frameState.size[0] * pixelRatio);\n    var height = Math.round(frameState.size[1] * pixelRatio);\n    if (this.canvas_.width != width || this.canvas_.height != height) {\n      this.canvas_.width = width;\n      this.canvas_.height = height;\n    } else {\n      context.clearRect(0, 0, width, height);\n    }\n\n    var rotation = frameState.viewState.rotation;\n\n    this.calculateMatrices2D(frameState);\n\n    this.dispatchRenderEvent(RenderEventType.PRECOMPOSE, frameState);\n\n    var layerStatesArray = frameState.layerStatesArray;\n    stableSort(layerStatesArray, sortByZIndex);\n\n    if (rotation) {\n      context.save();\n      rotateAtOffset(context, rotation, width / 2, height / 2);\n    }\n\n    var viewResolution = frameState.viewState.resolution;\n    var i, ii;\n    for (i = 0, ii = layerStatesArray.length; i < ii; ++i) {\n      var layerState = layerStatesArray[i];\n      var layer = layerState.layer;\n      var layerRenderer = /** @type {import(\"./Layer.js\").default} */ (this.getLayerRenderer(layer));\n      if (!visibleAtResolution(layerState, viewResolution) ||\n          layerState.sourceState != SourceState.READY) {\n        continue;\n      }\n      if (layerRenderer.prepareFrame(frameState, layerState)) {\n        layerRenderer.composeFrame(frameState, layerState, context);\n      }\n    }\n\n    if (rotation) {\n      context.restore();\n    }\n\n    this.dispatchRenderEvent(RenderEventType.POSTCOMPOSE, frameState);\n\n    if (!this.renderedVisible_) {\n      this.canvas_.style.display = '';\n      this.renderedVisible_ = true;\n    }\n\n    this.scheduleRemoveUnusedLayerRenderers(frameState);\n    this.scheduleExpireIconCache(frameState);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasMapRenderer.prototype.forEachLayerAtPixel = function forEachLayerAtPixel (pixel, frameState, hitTolerance, callback, thisArg, layerFilter, thisArg2) {\n    var result;\n    var viewState = frameState.viewState;\n    var viewResolution = viewState.resolution;\n\n    var layerStates = frameState.layerStatesArray;\n    var numLayers = layerStates.length;\n\n    var coordinate = applyTransform(\n      frameState.pixelToCoordinateTransform, pixel.slice());\n\n    var i;\n    for (i = numLayers - 1; i >= 0; --i) {\n      var layerState = layerStates[i];\n      var layer = layerState.layer;\n      if (visibleAtResolution(layerState, viewResolution) && layerFilter.call(thisArg2, layer)) {\n        var layerRenderer = /** @type {import(\"./Layer.js\").default} */ (this.getLayerRenderer(layer));\n        result = layerRenderer.forEachLayerAtCoordinate(\n          coordinate, frameState, hitTolerance, callback, thisArg);\n        if (result) {\n          return result;\n        }\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasMapRenderer.prototype.registerLayerRenderers = function registerLayerRenderers (constructors) {\n    MapRenderer.prototype.registerLayerRenderers.call(this, constructors);\n    for (var i = 0, ii = constructors.length; i < ii; ++i) {\n      var ctor = constructors[i];\n      if (!includes(layerRendererConstructors, ctor)) {\n        layerRendererConstructors.push(ctor);\n      }\n    }\n  };\n\n  return CanvasMapRenderer;\n}(MapRenderer));\n\n\nexport default CanvasMapRenderer;\n\n//# sourceMappingURL=Map.js.map","/**\n * @module ol/renderer/Layer\n */\nimport {getUid} from '../util.js';\nimport ImageState from '../ImageState.js';\nimport Observable from '../Observable.js';\nimport TileState from '../TileState.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport SourceState from '../source/State.js';\n\nvar LayerRenderer = /*@__PURE__*/(function (Observable) {\n  function LayerRenderer(layer) {\n\n    Observable.call(this);\n\n    /**\n     * @private\n     * @type {import(\"../layer/Layer.js\").default}\n     */\n    this.layer_ = layer;\n\n  }\n\n  if ( Observable ) LayerRenderer.__proto__ = Observable;\n  LayerRenderer.prototype = Object.create( Observable && Observable.prototype );\n  LayerRenderer.prototype.constructor = LayerRenderer;\n\n  /**\n   * Create a function that adds loaded tiles to the tile lookup.\n   * @param {import(\"../source/Tile.js\").default} source Tile source.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection of the tiles.\n   * @param {Object<number, Object<string, import(\"../Tile.js\").default>>} tiles Lookup of loaded tiles by zoom level.\n   * @return {function(number, import(\"../TileRange.js\").default):boolean} A function that can be\n   *     called with a zoom level and a tile range to add loaded tiles to the lookup.\n   * @protected\n   */\n  LayerRenderer.prototype.createLoadedTileFinder = function createLoadedTileFinder (source, projection, tiles) {\n    return (\n      /**\n       * @param {number} zoom Zoom level.\n       * @param {import(\"../TileRange.js\").default} tileRange Tile range.\n       * @return {boolean} The tile range is fully loaded.\n       */\n      function(zoom, tileRange) {\n        /**\n         * @param {import(\"../Tile.js\").default} tile Tile.\n         */\n        function callback(tile) {\n          if (!tiles[zoom]) {\n            tiles[zoom] = {};\n          }\n          tiles[zoom][tile.tileCoord.toString()] = tile;\n        }\n        return source.forEachLoadedTile(projection, zoom, tileRange, callback);\n      }\n    );\n  };\n\n  /**\n   * @abstract\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {function(import(\"../Feature.js\").FeatureLike, import(\"../layer/Layer.js\").default): T} callback Feature callback.\n   * @return {T|void} Callback result.\n   * @template T\n   */\n  LayerRenderer.prototype.forEachFeatureAtCoordinate = function forEachFeatureAtCoordinate (coordinate, frameState, hitTolerance, callback) {};\n\n  /**\n   * @return {import(\"../layer/Layer.js\").default} Layer.\n   */\n  LayerRenderer.prototype.getLayer = function getLayer () {\n    return this.layer_;\n  };\n\n  /**\n   * Handle changes in image state.\n   * @param {import(\"../events/Event.js\").default} event Image change event.\n   * @private\n   */\n  LayerRenderer.prototype.handleImageChange_ = function handleImageChange_ (event) {\n    var image = /** @type {import(\"../Image.js\").default} */ (event.target);\n    if (image.getState() === ImageState.LOADED) {\n      this.renderIfReadyAndVisible();\n    }\n  };\n\n  /**\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   * @return {boolean} Is there a feature at the given coordinate?\n   */\n  LayerRenderer.prototype.hasFeatureAtCoordinate = function hasFeatureAtCoordinate (coordinate, frameState) {\n    return false;\n  };\n\n  /**\n   * Load the image if not already loaded, and register the image change\n   * listener if needed.\n   * @param {import(\"../ImageBase.js\").default} image Image.\n   * @return {boolean} `true` if the image is already loaded, `false` otherwise.\n   * @protected\n   */\n  LayerRenderer.prototype.loadImage = function loadImage (image) {\n    var imageState = image.getState();\n    if (imageState != ImageState.LOADED && imageState != ImageState.ERROR) {\n      listen(image, EventType.CHANGE, this.handleImageChange_, this);\n    }\n    if (imageState == ImageState.IDLE) {\n      image.load();\n      imageState = image.getState();\n    }\n    return imageState == ImageState.LOADED;\n  };\n\n  /**\n   * @protected\n   */\n  LayerRenderer.prototype.renderIfReadyAndVisible = function renderIfReadyAndVisible () {\n    var layer = this.getLayer();\n    if (layer.getVisible() && layer.getSourceState() == SourceState.READY) {\n      this.changed();\n    }\n  };\n\n  /**\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../source/Tile.js\").default} tileSource Tile source.\n   * @protected\n   */\n  LayerRenderer.prototype.scheduleExpireCache = function scheduleExpireCache (frameState, tileSource) {\n    if (tileSource.canExpireCache()) {\n      /**\n       * @param {import(\"../source/Tile.js\").default} tileSource Tile source.\n       * @param {import(\"../PluggableMap.js\").default} map Map.\n       * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n       */\n      var postRenderFunction = function(tileSource, map, frameState) {\n        var tileSourceKey = getUid(tileSource);\n        if (tileSourceKey in frameState.usedTiles) {\n          tileSource.expireCache(frameState.viewState.projection,\n            frameState.usedTiles[tileSourceKey]);\n        }\n      }.bind(null, tileSource);\n\n      frameState.postRenderFunctions.push(\n        /** @type {import(\"../PluggableMap.js\").PostRenderFunction} */ (postRenderFunction)\n      );\n    }\n  };\n\n  /**\n   * @param {!Object<string, !Object<string, import(\"../TileRange.js\").default>>} usedTiles Used tiles.\n   * @param {import(\"../source/Tile.js\").default} tileSource Tile source.\n   * @param {number} z Z.\n   * @param {import(\"../TileRange.js\").default} tileRange Tile range.\n   * @protected\n   */\n  LayerRenderer.prototype.updateUsedTiles = function updateUsedTiles (usedTiles, tileSource, z, tileRange) {\n    // FIXME should we use tilesToDrawByZ instead?\n    var tileSourceKey = getUid(tileSource);\n    var zKey = z.toString();\n    if (tileSourceKey in usedTiles) {\n      if (zKey in usedTiles[tileSourceKey]) {\n        usedTiles[tileSourceKey][zKey].extend(tileRange);\n      } else {\n        usedTiles[tileSourceKey][zKey] = tileRange;\n      }\n    } else {\n      usedTiles[tileSourceKey] = {};\n      usedTiles[tileSourceKey][zKey] = tileRange;\n    }\n  };\n\n  /**\n   * Manage tile pyramid.\n   * This function performs a number of functions related to the tiles at the\n   * current zoom and lower zoom levels:\n   * - registers idle tiles in frameState.wantedTiles so that they are not\n   *   discarded by the tile queue\n   * - enqueues missing tiles\n   * @param {import(\"../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../source/Tile.js\").default} tileSource Tile source.\n   * @param {import(\"../tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} currentZ Current Z.\n   * @param {number} preload Load low resolution tiles up to 'preload' levels.\n   * @param {function(this: T, import(\"../Tile.js\").default)=} opt_tileCallback Tile callback.\n   * @param {T=} opt_this Object to use as `this` in `opt_tileCallback`.\n   * @protected\n   * @template T\n   */\n  LayerRenderer.prototype.manageTilePyramid = function manageTilePyramid (\n    frameState,\n    tileSource,\n    tileGrid,\n    pixelRatio,\n    projection,\n    extent,\n    currentZ,\n    preload,\n    opt_tileCallback,\n    opt_this\n  ) {\n    var tileSourceKey = getUid(tileSource);\n    if (!(tileSourceKey in frameState.wantedTiles)) {\n      frameState.wantedTiles[tileSourceKey] = {};\n    }\n    var wantedTiles = frameState.wantedTiles[tileSourceKey];\n    var tileQueue = frameState.tileQueue;\n    var minZoom = tileGrid.getMinZoom();\n    var tile, tileRange, tileResolution, x, y, z;\n    for (z = minZoom; z <= currentZ; ++z) {\n      tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z, tileRange);\n      tileResolution = tileGrid.getResolution(z);\n      for (x = tileRange.minX; x <= tileRange.maxX; ++x) {\n        for (y = tileRange.minY; y <= tileRange.maxY; ++y) {\n          if (currentZ - z <= preload) {\n            tile = tileSource.getTile(z, x, y, pixelRatio, projection);\n            if (tile.getState() == TileState.IDLE) {\n              wantedTiles[tile.getKey()] = true;\n              if (!tileQueue.isKeyQueued(tile.getKey())) {\n                tileQueue.enqueue([tile, tileSourceKey,\n                  tileGrid.getTileCoordCenter(tile.tileCoord), tileResolution]);\n              }\n            }\n            if (opt_tileCallback !== undefined) {\n              opt_tileCallback.call(opt_this, tile);\n            }\n          } else {\n            tileSource.useTile(z, x, y, projection);\n          }\n        }\n      }\n    }\n  };\n\n  return LayerRenderer;\n}(Observable));\n\nexport default LayerRenderer;\n\n//# sourceMappingURL=Layer.js.map","/**\n * @module ol/renderer/canvas/Layer\n */\nimport {abstract} from '../../util.js';\nimport {getBottomLeft, getBottomRight, getTopLeft, getTopRight} from '../../extent.js';\nimport {TRUE} from '../../functions.js';\nimport RenderEvent from '../../render/Event.js';\nimport RenderEventType from '../../render/EventType.js';\nimport {rotateAtOffset} from '../../render/canvas.js';\nimport CanvasImmediateRenderer from '../../render/canvas/Immediate.js';\nimport LayerRenderer from '../Layer.js';\nimport {create as createTransform, apply as applyTransform, compose as composeTransform} from '../../transform.js';\n\n/**\n * @abstract\n */\nvar CanvasLayerRenderer = /*@__PURE__*/(function (LayerRenderer) {\n  function CanvasLayerRenderer(layer) {\n\n    LayerRenderer.call(this, layer);\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.renderedResolution;\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.transform_ = createTransform();\n\n  }\n\n  if ( LayerRenderer ) CanvasLayerRenderer.__proto__ = LayerRenderer;\n  CanvasLayerRenderer.prototype = Object.create( LayerRenderer && LayerRenderer.prototype );\n  CanvasLayerRenderer.prototype.constructor = CanvasLayerRenderer;\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../extent.js\").Extent} extent Clip extent.\n   * @protected\n   */\n  CanvasLayerRenderer.prototype.clip = function clip (context, frameState, extent) {\n    var pixelRatio = frameState.pixelRatio;\n    var width = frameState.size[0] * pixelRatio;\n    var height = frameState.size[1] * pixelRatio;\n    var rotation = frameState.viewState.rotation;\n    var topLeft = getTopLeft(extent);\n    var topRight = getTopRight(extent);\n    var bottomRight = getBottomRight(extent);\n    var bottomLeft = getBottomLeft(extent);\n\n    applyTransform(frameState.coordinateToPixelTransform, topLeft);\n    applyTransform(frameState.coordinateToPixelTransform, topRight);\n    applyTransform(frameState.coordinateToPixelTransform, bottomRight);\n    applyTransform(frameState.coordinateToPixelTransform, bottomLeft);\n\n    context.save();\n    rotateAtOffset(context, -rotation, width / 2, height / 2);\n    context.beginPath();\n    context.moveTo(topLeft[0] * pixelRatio, topLeft[1] * pixelRatio);\n    context.lineTo(topRight[0] * pixelRatio, topRight[1] * pixelRatio);\n    context.lineTo(bottomRight[0] * pixelRatio, bottomRight[1] * pixelRatio);\n    context.lineTo(bottomLeft[0] * pixelRatio, bottomLeft[1] * pixelRatio);\n    context.clip();\n    rotateAtOffset(context, rotation, width / 2, height / 2);\n  };\n\n  /**\n   * @param {import(\"../../render/EventType.js\").default} type Event type.\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../transform.js\").Transform=} opt_transform Transform.\n   * @private\n   */\n  CanvasLayerRenderer.prototype.dispatchComposeEvent_ = function dispatchComposeEvent_ (type, context, frameState, opt_transform) {\n    var layer = this.getLayer();\n    if (layer.hasListener(type)) {\n      var width = frameState.size[0] * frameState.pixelRatio;\n      var height = frameState.size[1] * frameState.pixelRatio;\n      var rotation = frameState.viewState.rotation;\n      rotateAtOffset(context, -rotation, width / 2, height / 2);\n      var transform = opt_transform !== undefined ?\n        opt_transform : this.getTransform(frameState, 0);\n      var render = new CanvasImmediateRenderer(\n        context, frameState.pixelRatio, frameState.extent, transform,\n        frameState.viewState.rotation);\n      var composeEvent = new RenderEvent(type, render, frameState,\n        context, null);\n      layer.dispatchEvent(composeEvent);\n      rotateAtOffset(context, rotation, width / 2, height / 2);\n    }\n  };\n\n  /**\n   * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState FrameState.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {function(this: S, import(\"../../layer/Layer.js\").default, (Uint8ClampedArray|Uint8Array)): T} callback Layer\n   *     callback.\n   * @param {S} thisArg Value to use as `this` when executing `callback`.\n   * @return {T|undefined} Callback result.\n   * @template S,T,U\n   */\n  CanvasLayerRenderer.prototype.forEachLayerAtCoordinate = function forEachLayerAtCoordinate (coordinate, frameState, hitTolerance, callback, thisArg) {\n    var hasFeature = this.forEachFeatureAtCoordinate(coordinate, frameState, hitTolerance, TRUE);\n\n    if (hasFeature) {\n      return callback.call(thisArg, this.getLayer(), null);\n    } else {\n      return undefined;\n    }\n  };\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../layer/Layer.js\").State} layerState Layer state.\n   * @param {import(\"../../transform.js\").Transform=} opt_transform Transform.\n   * @protected\n   */\n  CanvasLayerRenderer.prototype.postCompose = function postCompose (context, frameState, layerState, opt_transform) {\n    this.dispatchComposeEvent_(RenderEventType.POSTCOMPOSE, context, frameState, opt_transform);\n  };\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../transform.js\").Transform=} opt_transform Transform.\n   * @protected\n   */\n  CanvasLayerRenderer.prototype.preCompose = function preCompose (context, frameState, opt_transform) {\n    this.dispatchComposeEvent_(RenderEventType.PRECOMPOSE, context, frameState, opt_transform);\n  };\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../transform.js\").Transform=} opt_transform Transform.\n   * @protected\n   */\n  CanvasLayerRenderer.prototype.dispatchRenderEvent = function dispatchRenderEvent (context, frameState, opt_transform) {\n    this.dispatchComposeEvent_(RenderEventType.RENDER, context, frameState, opt_transform);\n  };\n\n  /**\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {number} offsetX Offset on the x-axis in view coordinates.\n   * @protected\n   * @return {!import(\"../../transform.js\").Transform} Transform.\n   */\n  CanvasLayerRenderer.prototype.getTransform = function getTransform (frameState, offsetX) {\n    var viewState = frameState.viewState;\n    var pixelRatio = frameState.pixelRatio;\n    var dx1 = pixelRatio * frameState.size[0] / 2;\n    var dy1 = pixelRatio * frameState.size[1] / 2;\n    var sx = pixelRatio / viewState.resolution;\n    var sy = -sx;\n    var angle = -viewState.rotation;\n    var dx2 = -viewState.center[0] + offsetX;\n    var dy2 = -viewState.center[1];\n    return composeTransform(this.transform_, dx1, dy1, sx, sy, angle, dx2, dy2);\n  };\n\n  /**\n   * @abstract\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../layer/Layer.js\").State} layerState Layer state.\n   * @param {CanvasRenderingContext2D} context Context.\n   */\n  CanvasLayerRenderer.prototype.composeFrame = function composeFrame (frameState, layerState, context) {\n    abstract();\n  };\n\n  /**\n   * @abstract\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../layer/Layer.js\").State} layerState Layer state.\n   * @return {boolean} whether composeFrame should be called.\n   */\n  CanvasLayerRenderer.prototype.prepareFrame = function prepareFrame (frameState, layerState) {\n    return abstract();\n  };\n\n  return CanvasLayerRenderer;\n}(LayerRenderer));\n\nexport default CanvasLayerRenderer;\n\n//# sourceMappingURL=Layer.js.map","/**\n * @module ol/renderer/canvas/IntermediateCanvas\n */\nimport {abstract} from '../../util.js';\nimport {scale as scaleCoordinate} from '../../coordinate.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {containsExtent, intersects} from '../../extent.js';\nimport CanvasLayerRenderer from './Layer.js';\nimport {create as createTransform, apply as applyTransform} from '../../transform.js';\n\n/**\n * @abstract\n */\nvar IntermediateCanvasRenderer = /*@__PURE__*/(function (CanvasLayerRenderer) {\n  function IntermediateCanvasRenderer(layer) {\n\n    CanvasLayerRenderer.call(this, layer);\n\n    /**\n     * @protected\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.coordinateToCanvasPixelTransform = createTransform();\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.hitCanvasContext_ = null;\n\n  }\n\n  if ( CanvasLayerRenderer ) IntermediateCanvasRenderer.__proto__ = CanvasLayerRenderer;\n  IntermediateCanvasRenderer.prototype = Object.create( CanvasLayerRenderer && CanvasLayerRenderer.prototype );\n  IntermediateCanvasRenderer.prototype.constructor = IntermediateCanvasRenderer;\n\n  /**\n   * @inheritDoc\n   */\n  IntermediateCanvasRenderer.prototype.composeFrame = function composeFrame (frameState, layerState, context) {\n\n    this.preCompose(context, frameState);\n\n    var image = this.getImage();\n    if (image) {\n\n      // clipped rendering if layer extent is set\n      var extent = layerState.extent;\n      var clipped = extent !== undefined &&\n          !containsExtent(extent, frameState.extent) &&\n          intersects(extent, frameState.extent);\n      if (clipped) {\n        this.clip(context, frameState, /** @type {import(\"../../extent.js\").Extent} */ (extent));\n      }\n\n      var imageTransform = this.getImageTransform();\n      // for performance reasons, context.save / context.restore is not used\n      // to save and restore the transformation matrix and the opacity.\n      // see http://jsperf.com/context-save-restore-versus-variable\n      var alpha = context.globalAlpha;\n      context.globalAlpha = layerState.opacity;\n\n      // for performance reasons, context.setTransform is only used\n      // when the view is rotated. see http://jsperf.com/canvas-transform\n      var dx = imageTransform[4];\n      var dy = imageTransform[5];\n      var dw = image.width * imageTransform[0];\n      var dh = image.height * imageTransform[3];\n      if (dw >= 0.5 && dh >= 0.5) {\n        context.drawImage(image, 0, 0, +image.width, +image.height,\n          Math.round(dx), Math.round(dy), Math.round(dw), Math.round(dh));\n      }\n      context.globalAlpha = alpha;\n\n      if (clipped) {\n        context.restore();\n      }\n    }\n\n    this.postCompose(context, frameState, layerState);\n  };\n\n  /**\n   * @abstract\n   * @return {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement} Canvas.\n   */\n  IntermediateCanvasRenderer.prototype.getImage = function getImage () {\n    return abstract();\n  };\n\n  /**\n   * @abstract\n   * @return {!import(\"../../transform.js\").Transform} Image transform.\n   */\n  IntermediateCanvasRenderer.prototype.getImageTransform = function getImageTransform () {\n    return abstract();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  IntermediateCanvasRenderer.prototype.forEachLayerAtCoordinate = function forEachLayerAtCoordinate (coordinate, frameState, hitTolerance, callback, thisArg) {\n    if (!this.getImage()) {\n      return undefined;\n    }\n\n    var pixel = applyTransform(this.coordinateToCanvasPixelTransform, coordinate.slice());\n    scaleCoordinate(pixel, frameState.viewState.resolution / this.renderedResolution);\n\n    if (!this.hitCanvasContext_) {\n      this.hitCanvasContext_ = createCanvasContext2D(1, 1);\n    }\n\n    this.hitCanvasContext_.clearRect(0, 0, 1, 1);\n    this.hitCanvasContext_.drawImage(this.getImage(), pixel[0], pixel[1], 1, 1, 0, 0, 1, 1);\n\n    var imageData = this.hitCanvasContext_.getImageData(0, 0, 1, 1).data;\n    if (imageData[3] > 0) {\n      return callback.call(thisArg, this.getLayer(), imageData);\n    } else {\n      return undefined;\n    }\n  };\n\n  return IntermediateCanvasRenderer;\n}(CanvasLayerRenderer));\n\n\nexport default IntermediateCanvasRenderer;\n\n//# sourceMappingURL=IntermediateCanvas.js.map","/**\n * @module ol/renderer/canvas/ImageLayer\n */\nimport {ENABLE_RASTER_REPROJECTION} from '../../reproj/common.js';\nimport ImageCanvas from '../../ImageCanvas.js';\nimport LayerType from '../../LayerType.js';\nimport ViewHint from '../../ViewHint.js';\nimport {equals} from '../../array.js';\nimport {getHeight, getIntersection, getWidth, isEmpty} from '../../extent.js';\nimport VectorRenderType from '../../layer/VectorRenderType.js';\nimport {assign} from '../../obj.js';\nimport {layerRendererConstructors} from './Map.js';\nimport IntermediateCanvasRenderer from './IntermediateCanvas.js';\nimport {create as createTransform, compose as composeTransform} from '../../transform.js';\n\n/**\n * @classdesc\n * Canvas renderer for image layers.\n * @api\n */\nvar CanvasImageLayerRenderer = /*@__PURE__*/(function (IntermediateCanvasRenderer) {\n  function CanvasImageLayerRenderer(imageLayer) {\n\n    IntermediateCanvasRenderer.call(this, imageLayer);\n\n    /**\n     * @private\n     * @type {?import(\"../../ImageBase.js\").default}\n     */\n    this.image_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.imageTransform_ = createTransform();\n\n    /**\n     * @type {!Array<string>}\n     */\n    this.skippedFeatures_ = [];\n\n    /**\n     * @private\n     * @type {import(\"./VectorLayer.js\").default}\n     */\n    this.vectorRenderer_ = null;\n\n    if (imageLayer.getType() === LayerType.VECTOR) {\n      for (var i = 0, ii = layerRendererConstructors.length; i < ii; ++i) {\n        var ctor = layerRendererConstructors[i];\n        if (ctor !== CanvasImageLayerRenderer && ctor['handles'](imageLayer)) {\n          this.vectorRenderer_ = /** @type {import(\"./VectorLayer.js\").default} */ (new ctor(imageLayer));\n          break;\n        }\n      }\n    }\n\n  }\n\n  if ( IntermediateCanvasRenderer ) CanvasImageLayerRenderer.__proto__ = IntermediateCanvasRenderer;\n  CanvasImageLayerRenderer.prototype = Object.create( IntermediateCanvasRenderer && IntermediateCanvasRenderer.prototype );\n  CanvasImageLayerRenderer.prototype.constructor = CanvasImageLayerRenderer;\n\n  /**\n   * @inheritDoc\n   */\n  CanvasImageLayerRenderer.prototype.disposeInternal = function disposeInternal () {\n    if (this.vectorRenderer_) {\n      this.vectorRenderer_.dispose();\n    }\n    IntermediateCanvasRenderer.prototype.disposeInternal.call(this);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasImageLayerRenderer.prototype.getImage = function getImage () {\n    return !this.image_ ? null : this.image_.getImage();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasImageLayerRenderer.prototype.getImageTransform = function getImageTransform () {\n    return this.imageTransform_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasImageLayerRenderer.prototype.prepareFrame = function prepareFrame (frameState, layerState) {\n\n    var pixelRatio = frameState.pixelRatio;\n    var size = frameState.size;\n    var viewState = frameState.viewState;\n    var viewCenter = viewState.center;\n    var viewResolution = viewState.resolution;\n\n    var image;\n    var imageLayer = /** @type {import(\"../../layer/Image.js\").default} */ (this.getLayer());\n    var imageSource = /** @type {import(\"../../source/Image.js\").default} */ (imageLayer.getSource());\n\n    var hints = frameState.viewHints;\n\n    var vectorRenderer = this.vectorRenderer_;\n    var renderedExtent = frameState.extent;\n    if (!vectorRenderer && layerState.extent !== undefined) {\n      renderedExtent = getIntersection(renderedExtent, layerState.extent);\n    }\n\n    if (!hints[ViewHint.ANIMATING] && !hints[ViewHint.INTERACTING] &&\n        !isEmpty(renderedExtent)) {\n      var projection = viewState.projection;\n      if (!ENABLE_RASTER_REPROJECTION) {\n        var sourceProjection = imageSource.getProjection();\n        if (sourceProjection) {\n          projection = sourceProjection;\n        }\n      }\n      var skippedFeatures = this.skippedFeatures_;\n      if (vectorRenderer) {\n        var context = vectorRenderer.context;\n        var imageFrameState = /** @type {import(\"../../PluggableMap.js\").FrameState} */ (assign({}, frameState, {\n          size: [\n            getWidth(renderedExtent) / viewResolution,\n            getHeight(renderedExtent) / viewResolution\n          ],\n          viewState: /** @type {import(\"../../View.js\").State} */ (assign({}, frameState.viewState, {\n            rotation: 0\n          }))\n        }));\n        var newSkippedFeatures = Object.keys(imageFrameState.skippedFeatureUids).sort();\n        image = new ImageCanvas(renderedExtent, viewResolution, pixelRatio, context.canvas, function(callback) {\n          if (vectorRenderer.prepareFrame(imageFrameState, layerState) &&\n              (vectorRenderer.replayGroupChanged ||\n              !equals(skippedFeatures, newSkippedFeatures))) {\n            context.canvas.width = imageFrameState.size[0] * pixelRatio;\n            context.canvas.height = imageFrameState.size[1] * pixelRatio;\n            vectorRenderer.compose(context, imageFrameState, layerState);\n            skippedFeatures = newSkippedFeatures;\n            callback();\n          }\n        });\n      } else {\n        image = imageSource.getImage(\n          renderedExtent, viewResolution, pixelRatio, projection);\n      }\n      if (image && this.loadImage(image)) {\n        this.image_ = image;\n        this.skippedFeatures_ = skippedFeatures;\n      }\n    }\n\n    if (this.image_) {\n      image = this.image_;\n      var imageExtent = image.getExtent();\n      var imageResolution = image.getResolution();\n      var imagePixelRatio = image.getPixelRatio();\n      var scale = pixelRatio * imageResolution /\n          (viewResolution * imagePixelRatio);\n      var transform = composeTransform(this.imageTransform_,\n        pixelRatio * size[0] / 2, pixelRatio * size[1] / 2,\n        scale, scale,\n        0,\n        imagePixelRatio * (imageExtent[0] - viewCenter[0]) / imageResolution,\n        imagePixelRatio * (viewCenter[1] - imageExtent[3]) / imageResolution);\n      composeTransform(this.coordinateToCanvasPixelTransform,\n        pixelRatio * size[0] / 2 - transform[4], pixelRatio * size[1] / 2 - transform[5],\n        pixelRatio / viewResolution, -pixelRatio / viewResolution,\n        0,\n        -viewCenter[0], -viewCenter[1]);\n\n      this.renderedResolution = imageResolution * pixelRatio / imagePixelRatio;\n    }\n\n    return !!this.image_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasImageLayerRenderer.prototype.forEachFeatureAtCoordinate = function forEachFeatureAtCoordinate (coordinate, frameState, hitTolerance, callback) {\n    if (this.vectorRenderer_) {\n      return this.vectorRenderer_.forEachFeatureAtCoordinate(coordinate, frameState, hitTolerance, callback);\n    } else {\n      return IntermediateCanvasRenderer.prototype.forEachFeatureAtCoordinate.call(this, coordinate, frameState, hitTolerance, callback);\n    }\n  };\n\n  return CanvasImageLayerRenderer;\n}(IntermediateCanvasRenderer));\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {import(\"../../layer/Layer.js\").default} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nCanvasImageLayerRenderer['handles'] = function(layer) {\n  return layer.getType() === LayerType.IMAGE ||\n    layer.getType() === LayerType.VECTOR &&\n    /** @type {import(\"../../layer/Vector.js\").default} */ (layer).getRenderMode() === VectorRenderType.IMAGE;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {import(\"../Map.js\").default} mapRenderer The map renderer.\n * @param {import(\"../../layer/Layer.js\").default} layer The layer to be rendererd.\n * @return {CanvasImageLayerRenderer} The layer renderer.\n */\nCanvasImageLayerRenderer['create'] = function(mapRenderer, layer) {\n  return new CanvasImageLayerRenderer(/** @type {import(\"../../layer/Image.js\").default} */ (layer));\n};\n\n\nexport default CanvasImageLayerRenderer;\n\n//# sourceMappingURL=ImageLayer.js.map","/**\n * @module ol/TileRange\n */\n\n/**\n * A representation of a contiguous block of tiles.  A tile range is specified\n * by its min/max tile coordinates and is inclusive of coordinates.\n */\nvar TileRange = function TileRange(minX, maxX, minY, maxY) {\n\n  /**\n   * @type {number}\n   */\n  this.minX = minX;\n\n  /**\n   * @type {number}\n   */\n  this.maxX = maxX;\n\n  /**\n   * @type {number}\n   */\n  this.minY = minY;\n\n  /**\n   * @type {number}\n   */\n  this.maxY = maxY;\n\n};\n\n/**\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @return {boolean} Contains tile coordinate.\n */\nTileRange.prototype.contains = function contains (tileCoord) {\n  return this.containsXY(tileCoord[1], tileCoord[2]);\n};\n\n/**\n * @param {TileRange} tileRange Tile range.\n * @return {boolean} Contains.\n */\nTileRange.prototype.containsTileRange = function containsTileRange (tileRange) {\n  return this.minX <= tileRange.minX && tileRange.maxX <= this.maxX &&\n     this.minY <= tileRange.minY && tileRange.maxY <= this.maxY;\n};\n\n/**\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n * @return {boolean} Contains coordinate.\n */\nTileRange.prototype.containsXY = function containsXY (x, y) {\n  return this.minX <= x && x <= this.maxX && this.minY <= y && y <= this.maxY;\n};\n\n/**\n * @param {TileRange} tileRange Tile range.\n * @return {boolean} Equals.\n */\nTileRange.prototype.equals = function equals (tileRange) {\n  return this.minX == tileRange.minX && this.minY == tileRange.minY &&\n     this.maxX == tileRange.maxX && this.maxY == tileRange.maxY;\n};\n\n/**\n * @param {TileRange} tileRange Tile range.\n */\nTileRange.prototype.extend = function extend (tileRange) {\n  if (tileRange.minX < this.minX) {\n    this.minX = tileRange.minX;\n  }\n  if (tileRange.maxX > this.maxX) {\n    this.maxX = tileRange.maxX;\n  }\n  if (tileRange.minY < this.minY) {\n    this.minY = tileRange.minY;\n  }\n  if (tileRange.maxY > this.maxY) {\n    this.maxY = tileRange.maxY;\n  }\n};\n\n/**\n * @return {number} Height.\n */\nTileRange.prototype.getHeight = function getHeight () {\n  return this.maxY - this.minY + 1;\n};\n\n/**\n * @return {import(\"./size.js\").Size} Size.\n */\nTileRange.prototype.getSize = function getSize () {\n  return [this.getWidth(), this.getHeight()];\n};\n\n/**\n * @return {number} Width.\n */\nTileRange.prototype.getWidth = function getWidth () {\n  return this.maxX - this.minX + 1;\n};\n\n/**\n * @param {TileRange} tileRange Tile range.\n * @return {boolean} Intersects.\n */\nTileRange.prototype.intersects = function intersects (tileRange) {\n  return this.minX <= tileRange.maxX &&\n     this.maxX >= tileRange.minX &&\n     this.minY <= tileRange.maxY &&\n     this.maxY >= tileRange.minY;\n};\n\n\n/**\n * @param {number} minX Minimum X.\n * @param {number} maxX Maximum X.\n * @param {number} minY Minimum Y.\n * @param {number} maxY Maximum Y.\n * @param {TileRange=} tileRange TileRange.\n * @return {TileRange} Tile range.\n */\nexport function createOrUpdate(minX, maxX, minY, maxY, tileRange) {\n  if (tileRange !== undefined) {\n    tileRange.minX = minX;\n    tileRange.maxX = maxX;\n    tileRange.minY = minY;\n    tileRange.maxY = maxY;\n    return tileRange;\n  } else {\n    return new TileRange(minX, maxX, minY, maxY);\n  }\n}\n\n\nexport default TileRange;\n\n//# sourceMappingURL=TileRange.js.map","/**\n * @module ol/renderer/canvas/TileLayer\n */\nimport {getUid} from '../../util.js';\nimport LayerType from '../../LayerType.js';\nimport TileRange from '../../TileRange.js';\nimport TileState from '../../TileState.js';\nimport ViewHint from '../../ViewHint.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {containsExtent, createEmpty, equals, getIntersection, isEmpty} from '../../extent.js';\nimport IntermediateCanvasRenderer from './IntermediateCanvas.js';\nimport {create as createTransform, compose as composeTransform} from '../../transform.js';\n\n/**\n * @classdesc\n * Canvas renderer for tile layers.\n * @api\n */\nvar CanvasTileLayerRenderer = /*@__PURE__*/(function (IntermediateCanvasRenderer) {\n  function CanvasTileLayerRenderer(tileLayer, opt_noContext) {\n\n    IntermediateCanvasRenderer.call(this, tileLayer);\n\n    /**\n     * @protected\n     * @type {CanvasRenderingContext2D}\n     */\n    this.context = opt_noContext ? null : createCanvasContext2D();\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.oversampling_;\n\n    /**\n     * @private\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.renderedExtent_ = null;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.renderedRevision;\n\n    /**\n     * @protected\n     * @type {!Array<import(\"../../Tile.js\").default>}\n     */\n    this.renderedTiles = [];\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.newTiles_ = false;\n\n    /**\n     * @protected\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.tmpExtent = createEmpty();\n\n    /**\n     * @private\n     * @type {import(\"../../TileRange.js\").default}\n     */\n    this.tmpTileRange_ = new TileRange(0, 0, 0, 0);\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.imageTransform_ = createTransform();\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.zDirection = 0;\n\n  }\n\n  if ( IntermediateCanvasRenderer ) CanvasTileLayerRenderer.__proto__ = IntermediateCanvasRenderer;\n  CanvasTileLayerRenderer.prototype = Object.create( IntermediateCanvasRenderer && IntermediateCanvasRenderer.prototype );\n  CanvasTileLayerRenderer.prototype.constructor = CanvasTileLayerRenderer;\n\n  /**\n   * @private\n   * @param {import(\"../../Tile.js\").default} tile Tile.\n   * @return {boolean} Tile is drawable.\n   */\n  CanvasTileLayerRenderer.prototype.isDrawableTile_ = function isDrawableTile_ (tile) {\n    var tileLayer = /** @type {import(\"../../layer/Tile.js\").default} */ (this.getLayer());\n    var tileState = tile.getState();\n    var useInterimTilesOnError = tileLayer.getUseInterimTilesOnError();\n    return tileState == TileState.LOADED ||\n        tileState == TileState.EMPTY ||\n        tileState == TileState.ERROR && !useInterimTilesOnError;\n  };\n\n  /**\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../../proj/Projection.js\").default} projection Projection.\n   * @return {!import(\"../../Tile.js\").default} Tile.\n   */\n  CanvasTileLayerRenderer.prototype.getTile = function getTile (z, x, y, pixelRatio, projection) {\n    var tileLayer = /** @type {import(\"../../layer/Tile.js\").default} */ (this.getLayer());\n    var tileSource = /** @type {import(\"../../source/Tile.js\").default} */ (tileLayer.getSource());\n    var tile = tileSource.getTile(z, x, y, pixelRatio, projection);\n    if (tile.getState() == TileState.ERROR) {\n      if (!tileLayer.getUseInterimTilesOnError()) {\n        // When useInterimTilesOnError is false, we consider the error tile as loaded.\n        tile.setState(TileState.LOADED);\n      } else if (tileLayer.getPreload() > 0) {\n        // Preloaded tiles for lower resolutions might have finished loading.\n        this.newTiles_ = true;\n      }\n    }\n    if (!this.isDrawableTile_(tile)) {\n      tile = tile.getInterimTile();\n    }\n    return tile;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasTileLayerRenderer.prototype.prepareFrame = function prepareFrame (frameState, layerState) {\n\n    var pixelRatio = frameState.pixelRatio;\n    var size = frameState.size;\n    var viewState = frameState.viewState;\n    var projection = viewState.projection;\n    var viewResolution = viewState.resolution;\n    var viewCenter = viewState.center;\n\n    var tileLayer = /** @type {import(\"../../layer/Tile.js\").default} */ (this.getLayer());\n    var tileSource = /** @type {import(\"../../source/Tile.js\").default} */ (tileLayer.getSource());\n    var sourceRevision = tileSource.getRevision();\n    var tileGrid = tileSource.getTileGridForProjection(projection);\n    var z = tileGrid.getZForResolution(viewResolution, this.zDirection);\n    var tileResolution = tileGrid.getResolution(z);\n    var oversampling = Math.round(viewResolution / tileResolution) || 1;\n    var extent = frameState.extent;\n\n    if (layerState.extent !== undefined) {\n      extent = getIntersection(extent, layerState.extent);\n    }\n    if (isEmpty(extent)) {\n      // Return false to prevent the rendering of the layer.\n      return false;\n    }\n\n    var tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z);\n    var imageExtent = tileGrid.getTileRangeExtent(z, tileRange);\n\n    var tilePixelRatio = tileSource.getTilePixelRatio(pixelRatio);\n\n    /**\n     * @type {Object<number, Object<string, import(\"../../Tile.js\").default>>}\n     */\n    var tilesToDrawByZ = {};\n    tilesToDrawByZ[z] = {};\n\n    var findLoadedTiles = this.createLoadedTileFinder(\n      tileSource, projection, tilesToDrawByZ);\n\n    var hints = frameState.viewHints;\n    var animatingOrInteracting = hints[ViewHint.ANIMATING] || hints[ViewHint.INTERACTING];\n\n    var tmpExtent = this.tmpExtent;\n    var tmpTileRange = this.tmpTileRange_;\n    this.newTiles_ = false;\n    var tile, x, y;\n    for (x = tileRange.minX; x <= tileRange.maxX; ++x) {\n      for (y = tileRange.minY; y <= tileRange.maxY; ++y) {\n        if (Date.now() - frameState.time > 16 && animatingOrInteracting) {\n          continue;\n        }\n        tile = this.getTile(z, x, y, pixelRatio, projection);\n        if (this.isDrawableTile_(tile)) {\n          var uid = getUid(this);\n          if (tile.getState() == TileState.LOADED) {\n            tilesToDrawByZ[z][tile.tileCoord.toString()] = tile;\n            var inTransition = tile.inTransition(uid);\n            if (!this.newTiles_ && (inTransition || this.renderedTiles.indexOf(tile) === -1)) {\n              this.newTiles_ = true;\n            }\n          }\n          if (tile.getAlpha(uid, frameState.time) === 1) {\n            // don't look for alt tiles if alpha is 1\n            continue;\n          }\n        }\n\n        var childTileRange = tileGrid.getTileCoordChildTileRange(\n          tile.tileCoord, tmpTileRange, tmpExtent);\n        var covered = false;\n        if (childTileRange) {\n          covered = findLoadedTiles(z + 1, childTileRange);\n        }\n        if (!covered) {\n          tileGrid.forEachTileCoordParentTileRange(\n            tile.tileCoord, findLoadedTiles, null, tmpTileRange, tmpExtent);\n        }\n\n      }\n    }\n\n    var renderedResolution = tileResolution * pixelRatio / tilePixelRatio * oversampling;\n    if (!(this.renderedResolution && Date.now() - frameState.time > 16 && animatingOrInteracting) && (\n      this.newTiles_ ||\n          !(this.renderedExtent_ && containsExtent(this.renderedExtent_, extent)) ||\n          this.renderedRevision != sourceRevision ||\n          oversampling != this.oversampling_ ||\n          !animatingOrInteracting && renderedResolution != this.renderedResolution\n    )) {\n\n      var context = this.context;\n      if (context) {\n        var tilePixelSize = tileSource.getTilePixelSize(z, pixelRatio, projection);\n        var width = Math.round(tileRange.getWidth() * tilePixelSize[0] / oversampling);\n        var height = Math.round(tileRange.getHeight() * tilePixelSize[1] / oversampling);\n        var canvas = context.canvas;\n        if (canvas.width != width || canvas.height != height) {\n          this.oversampling_ = oversampling;\n          canvas.width = width;\n          canvas.height = height;\n        } else {\n          if ((this.renderedExtent_ && !equals(imageExtent, this.renderedExtent_)) ||\n              this.renderedRevision != sourceRevision) {\n            context.clearRect(0, 0, width, height);\n          }\n          oversampling = this.oversampling_;\n        }\n      }\n\n      this.renderedTiles.length = 0;\n      /** @type {Array<number>} */\n      var zs = Object.keys(tilesToDrawByZ).map(Number);\n      zs.sort(function(a, b) {\n        if (a === z) {\n          return 1;\n        } else if (b === z) {\n          return -1;\n        } else {\n          return a > b ? 1 : a < b ? -1 : 0;\n        }\n      });\n      var currentResolution, currentScale, currentTilePixelSize, currentZ, i, ii;\n      var tileExtent, tileGutter, tilesToDraw, w, h;\n      for (i = 0, ii = zs.length; i < ii; ++i) {\n        currentZ = zs[i];\n        currentTilePixelSize = tileSource.getTilePixelSize(currentZ, pixelRatio, projection);\n        currentResolution = tileGrid.getResolution(currentZ);\n        currentScale = currentResolution / tileResolution;\n        tileGutter = tilePixelRatio * tileSource.getGutterForProjection(projection);\n        tilesToDraw = tilesToDrawByZ[currentZ];\n        for (var tileCoordKey in tilesToDraw) {\n          tile = tilesToDraw[tileCoordKey];\n          tileExtent = tileGrid.getTileCoordExtent(tile.getTileCoord(), tmpExtent);\n          x = (tileExtent[0] - imageExtent[0]) / tileResolution * tilePixelRatio / oversampling;\n          y = (imageExtent[3] - tileExtent[3]) / tileResolution * tilePixelRatio / oversampling;\n          w = currentTilePixelSize[0] * currentScale / oversampling;\n          h = currentTilePixelSize[1] * currentScale / oversampling;\n          this.drawTileImage(tile, frameState, layerState, x, y, w, h, tileGutter, z === currentZ);\n          this.renderedTiles.push(tile);\n        }\n      }\n\n      this.renderedRevision = sourceRevision;\n      this.renderedResolution = tileResolution * pixelRatio / tilePixelRatio * oversampling;\n      this.renderedExtent_ = imageExtent;\n    }\n\n    var scale = this.renderedResolution / viewResolution;\n    var transform = composeTransform(this.imageTransform_,\n      pixelRatio * size[0] / 2, pixelRatio * size[1] / 2,\n      scale, scale,\n      0,\n      (this.renderedExtent_[0] - viewCenter[0]) / this.renderedResolution * pixelRatio,\n      (viewCenter[1] - this.renderedExtent_[3]) / this.renderedResolution * pixelRatio);\n    composeTransform(this.coordinateToCanvasPixelTransform,\n      pixelRatio * size[0] / 2 - transform[4], pixelRatio * size[1] / 2 - transform[5],\n      pixelRatio / viewResolution, -pixelRatio / viewResolution,\n      0,\n      -viewCenter[0], -viewCenter[1]);\n\n\n    this.updateUsedTiles(frameState.usedTiles, tileSource, z, tileRange);\n    this.manageTilePyramid(frameState, tileSource, tileGrid, pixelRatio,\n      projection, extent, z, tileLayer.getPreload());\n    this.scheduleExpireCache(frameState, tileSource);\n\n    return this.renderedTiles.length > 0;\n  };\n\n  /**\n   * @param {import(\"../../Tile.js\").default} tile Tile.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../layer/Layer.js\").State} layerState Layer state.\n   * @param {number} x Left of the tile.\n   * @param {number} y Top of the tile.\n   * @param {number} w Width of the tile.\n   * @param {number} h Height of the tile.\n   * @param {number} gutter Tile gutter.\n   * @param {boolean} transition Apply an alpha transition.\n   */\n  CanvasTileLayerRenderer.prototype.drawTileImage = function drawTileImage (tile, frameState, layerState, x, y, w, h, gutter, transition) {\n    var image = this.getTileImage(tile);\n    if (!image) {\n      return;\n    }\n    var uid = getUid(this);\n    var alpha = transition ? tile.getAlpha(uid, frameState.time) : 1;\n    var tileLayer = /** @type {import(\"../../layer/Tile.js\").default} */ (this.getLayer());\n    var tileSource = /** @type {import(\"../../source/Tile.js\").default} */ (tileLayer.getSource());\n    if (alpha === 1 && !tileSource.getOpaque(frameState.viewState.projection)) {\n      this.context.clearRect(x, y, w, h);\n    }\n    var alphaChanged = alpha !== this.context.globalAlpha;\n    if (alphaChanged) {\n      this.context.save();\n      this.context.globalAlpha = alpha;\n    }\n    this.context.drawImage(image, gutter, gutter,\n      image.width - 2 * gutter, image.height - 2 * gutter, x, y, w, h);\n\n    if (alphaChanged) {\n      this.context.restore();\n    }\n    if (alpha !== 1) {\n      frameState.animate = true;\n    } else if (transition) {\n      tile.endTransition(uid);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasTileLayerRenderer.prototype.getImage = function getImage () {\n    var context = this.context;\n    return context ? context.canvas : null;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasTileLayerRenderer.prototype.getImageTransform = function getImageTransform () {\n    return this.imageTransform_;\n  };\n\n  /**\n   * Get the image from a tile.\n   * @param {import(\"../../Tile.js\").default} tile Tile.\n   * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.\n   * @protected\n   */\n  CanvasTileLayerRenderer.prototype.getTileImage = function getTileImage (tile) {\n    return /** @type {import(\"../../ImageTile.js\").default} */ (tile).getImage();\n  };\n\n  return CanvasTileLayerRenderer;\n}(IntermediateCanvasRenderer));\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {import(\"../../layer/Layer.js\").default} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nCanvasTileLayerRenderer['handles'] = function(layer) {\n  return layer.getType() === LayerType.TILE;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {import(\"../Map.js\").default} mapRenderer The map renderer.\n * @param {import(\"../../layer/Layer.js\").default} layer The layer to be rendererd.\n * @return {CanvasTileLayerRenderer} The layer renderer.\n */\nCanvasTileLayerRenderer['create'] = function(mapRenderer, layer) {\n  return new CanvasTileLayerRenderer(/** @type {import(\"../../layer/Tile.js\").default} */ (layer));\n};\n\n\n/**\n * @function\n * @return {import(\"../../layer/Tile.js\").default|import(\"../../layer/VectorTile.js\").default}\n */\nCanvasTileLayerRenderer.prototype.getLayer;\n\n\nexport default CanvasTileLayerRenderer;\n\n//# sourceMappingURL=TileLayer.js.map","/**\n * @module ol/render/ReplayGroup\n */\nimport {abstract} from '../util.js';\n\n/**\n * Base class for replay groups.\n */\nvar ReplayGroup = function ReplayGroup () {};\n\nReplayGroup.prototype.getReplay = function getReplay (zIndex, replayType) {\n  return abstract();\n};\n\n/**\n * @abstract\n * @return {boolean} Is empty.\n */\nReplayGroup.prototype.isEmpty = function isEmpty () {\n  return abstract();\n};\n\n/**\n * @abstract\n * @param {boolean} group Group with previous replay\n * @return {Array<*>} The resulting instruction group\n */\nReplayGroup.prototype.addDeclutter = function addDeclutter (group) {\n  return abstract();\n};\n\nexport default ReplayGroup;\n\n//# sourceMappingURL=ReplayGroup.js.map","/**\n * @module ol/render/ReplayType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  CIRCLE: 'Circle',\n  DEFAULT: 'Default',\n  IMAGE: 'Image',\n  LINE_STRING: 'LineString',\n  POLYGON: 'Polygon',\n  TEXT: 'Text'\n};\n\n//# sourceMappingURL=ReplayType.js.map","/**\n * @module ol/geom/flat/length\n */\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {number} Length.\n */\nexport function lineStringLength(flatCoordinates, offset, end, stride) {\n  var x1 = flatCoordinates[offset];\n  var y1 = flatCoordinates[offset + 1];\n  var length = 0;\n  for (var i = offset + stride; i < end; i += stride) {\n    var x2 = flatCoordinates[i];\n    var y2 = flatCoordinates[i + 1];\n    length += Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));\n    x1 = x2;\n    y1 = y2;\n  }\n  return length;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {number} Perimeter.\n */\nexport function linearRingLength(flatCoordinates, offset, end, stride) {\n  var perimeter = lineStringLength(flatCoordinates, offset, end, stride);\n  var dx = flatCoordinates[end - stride] - flatCoordinates[offset];\n  var dy = flatCoordinates[end - stride + 1] - flatCoordinates[offset + 1];\n  perimeter += Math.sqrt(dx * dx + dy * dy);\n  return perimeter;\n}\n\n//# sourceMappingURL=length.js.map","/**\n * @module ol/geom/flat/textpath\n */\nimport {lerp} from '../../math.js';\n\n\n/**\n * @param {Array<number>} flatCoordinates Path to put text on.\n * @param {number} offset Start offset of the `flatCoordinates`.\n * @param {number} end End offset of the `flatCoordinates`.\n * @param {number} stride Stride.\n * @param {string} text Text to place on the path.\n * @param {function(string):number} measure Measure function returning the\n * width of the character passed as 1st argument.\n * @param {number} startM m along the path where the text starts.\n * @param {number} maxAngle Max angle between adjacent chars in radians.\n * @return {Array<Array<*>>} The result array of null if `maxAngle` was\n * exceeded. Entries of the array are x, y, anchorX, angle, chunk.\n */\nexport function drawTextOnPath(\n  flatCoordinates, offset, end, stride, text, measure, startM, maxAngle) {\n  var result = [];\n\n  // Keep text upright\n  var reverse = flatCoordinates[offset] > flatCoordinates[end - stride];\n\n  var numChars = text.length;\n\n  var x1 = flatCoordinates[offset];\n  var y1 = flatCoordinates[offset + 1];\n  offset += stride;\n  var x2 = flatCoordinates[offset];\n  var y2 = flatCoordinates[offset + 1];\n  var segmentM = 0;\n  var segmentLength = Math.sqrt(Math.pow(x2 - x1, 2) + Math.pow(y2 - y1, 2));\n\n  var chunk = '';\n  var chunkLength = 0;\n  var data, index, previousAngle;\n  for (var i = 0; i < numChars; ++i) {\n    index = reverse ? numChars - i - 1 : i;\n    var char = text.charAt(index);\n    chunk = reverse ? char + chunk : chunk + char;\n    var charLength = measure(chunk) - chunkLength;\n    chunkLength += charLength;\n    var charM = startM + charLength / 2;\n    while (offset < end - stride && segmentM + segmentLength < charM) {\n      x1 = x2;\n      y1 = y2;\n      offset += stride;\n      x2 = flatCoordinates[offset];\n      y2 = flatCoordinates[offset + 1];\n      segmentM += segmentLength;\n      segmentLength = Math.sqrt(Math.pow(x2 - x1, 2) + Math.pow(y2 - y1, 2));\n    }\n    var segmentPos = charM - segmentM;\n    var angle = Math.atan2(y2 - y1, x2 - x1);\n    if (reverse) {\n      angle += angle > 0 ? -Math.PI : Math.PI;\n    }\n    if (previousAngle !== undefined) {\n      var delta = angle - previousAngle;\n      delta += (delta > Math.PI) ? -2 * Math.PI : (delta < -Math.PI) ? 2 * Math.PI : 0;\n      if (Math.abs(delta) > maxAngle) {\n        return null;\n      }\n    }\n    var interpolate = segmentPos / segmentLength;\n    var x = lerp(x1, x2, interpolate);\n    var y = lerp(y1, y2, interpolate);\n    if (previousAngle == angle) {\n      if (reverse) {\n        data[0] = x;\n        data[1] = y;\n        data[2] = charLength / 2;\n      }\n      data[4] = chunk;\n    } else {\n      chunk = char;\n      chunkLength = charLength;\n      data = [x, y, charLength / 2, angle, chunk];\n      if (reverse) {\n        result.unshift(data);\n      } else {\n        result.push(data);\n      }\n      previousAngle = angle;\n    }\n    startM += charLength;\n  }\n  return result;\n}\n\n//# sourceMappingURL=textpath.js.map","/**\n * @module ol/render/canvas/Instruction\n */\n\n/**\n * @enum {number}\n */\nvar Instruction = {\n  BEGIN_GEOMETRY: 0,\n  BEGIN_PATH: 1,\n  CIRCLE: 2,\n  CLOSE_PATH: 3,\n  CUSTOM: 4,\n  DRAW_CHARS: 5,\n  DRAW_IMAGE: 6,\n  END_GEOMETRY: 7,\n  FILL: 8,\n  MOVE_TO_LINE_TO: 9,\n  SET_FILL_STYLE: 10,\n  SET_STROKE_STYLE: 11,\n  STROKE: 12\n};\n\n\n/**\n * @type {Array<Instruction>}\n */\nexport var fillInstruction = [Instruction.FILL];\n\n\n/**\n * @type {Array<Instruction>}\n */\nexport var strokeInstruction = [Instruction.STROKE];\n\n\n/**\n * @type {Array<Instruction>}\n */\nexport var beginPathInstruction = [Instruction.BEGIN_PATH];\n\n\n/**\n * @type {Array<Instruction>}\n */\nexport var closePathInstruction = [Instruction.CLOSE_PATH];\n\n\nexport default Instruction;\n\n//# sourceMappingURL=Instruction.js.map","/**\n * @module ol/render/replay\n */\nimport ReplayType from './ReplayType.js';\n\n\n/**\n * @const\n * @type {Array<ReplayType>}\n */\nexport var ORDER = [\n  ReplayType.POLYGON,\n  ReplayType.CIRCLE,\n  ReplayType.LINE_STRING,\n  ReplayType.IMAGE,\n  ReplayType.TEXT,\n  ReplayType.DEFAULT\n];\n\n/**\n * @const\n * @enum {number}\n */\nexport var TEXT_ALIGN = {};\nTEXT_ALIGN['left'] = 0;\nTEXT_ALIGN['end'] = 0;\nTEXT_ALIGN['center'] = 0.5;\nTEXT_ALIGN['right'] = 1;\nTEXT_ALIGN['start'] = 1;\nTEXT_ALIGN['top'] = 0;\nTEXT_ALIGN['middle'] = 0.5;\nTEXT_ALIGN['hanging'] = 0.2;\nTEXT_ALIGN['alphabetic'] = 0.8;\nTEXT_ALIGN['ideographic'] = 0.8;\nTEXT_ALIGN['bottom'] = 1;\n\n//# sourceMappingURL=replay.js.map","/**\n * @module ol/render/canvas/Replay\n */\nimport {getUid} from '../../util.js';\nimport {equals, reverseSubArray} from '../../array.js';\nimport {asColorLike} from '../../colorlike.js';\nimport {buffer, clone, coordinateRelationship, createEmpty, createOrUpdate,\n  createOrUpdateEmpty, extend, extendCoordinate, intersects} from '../../extent.js';\nimport Relationship from '../../extent/Relationship.js';\nimport GeometryType from '../../geom/GeometryType.js';\nimport {inflateCoordinates, inflateCoordinatesArray, inflateMultiCoordinatesArray} from '../../geom/flat/inflate.js';\nimport {lineStringLength} from '../../geom/flat/length.js';\nimport {drawTextOnPath} from '../../geom/flat/textpath.js';\nimport {transform2D} from '../../geom/flat/transform.js';\nimport {CANVAS_LINE_DASH} from '../../has.js';\nimport {isEmpty} from '../../obj.js';\nimport VectorContext from '../VectorContext.js';\nimport {drawImage, resetTransform, defaultPadding, defaultFillStyle, defaultStrokeStyle,\n  defaultMiterLimit, defaultLineWidth, defaultLineJoin, defaultLineDashOffset,\n  defaultLineDash, defaultLineCap} from '../canvas.js';\nimport CanvasInstruction from './Instruction.js';\nimport {TEXT_ALIGN} from '../replay.js';\nimport {\n  create as createTransform,\n  compose as composeTransform,\n  apply as applyTransform,\n  setFromArray as transformSetFromArray\n} from '../../transform.js';\n\n\n/**\n * @type {import(\"../../extent.js\").Extent}\n */\nvar tmpExtent = createEmpty();\n\n\n/**\n * @type {!import(\"../../transform.js\").Transform}\n */\nvar tmpTransform = createTransform();\n\n\nvar CanvasReplay = /*@__PURE__*/(function (VectorContext) {\n  function CanvasReplay(tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree) {\n    VectorContext.call(this);\n\n    /**\n     * @type {?}\n     */\n    this.declutterTree = declutterTree;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.tolerance = tolerance;\n\n    /**\n     * @protected\n     * @const\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.maxExtent = maxExtent;\n\n    /**\n     * @protected\n     * @type {boolean}\n     */\n    this.overlaps = overlaps;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.pixelRatio = pixelRatio;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.maxLineWidth = 0;\n\n    /**\n     * @protected\n     * @const\n     * @type {number}\n     */\n    this.resolution = resolution;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.alignFill_;\n\n    /**\n     * @private\n     * @type {Array<*>}\n     */\n    this.beginGeometryInstruction1_ = null;\n\n    /**\n     * @private\n     * @type {Array<*>}\n     */\n    this.beginGeometryInstruction2_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.bufferedMaxExtent_ = null;\n\n    /**\n     * @protected\n     * @type {Array<*>}\n     */\n    this.instructions = [];\n\n    /**\n     * @protected\n     * @type {Array<number>}\n     */\n    this.coordinates = [];\n\n    /**\n     * @private\n     * @type {!Object<number,import(\"../../coordinate.js\").Coordinate|Array<import(\"../../coordinate.js\").Coordinate>|Array<Array<import(\"../../coordinate.js\").Coordinate>>>}\n     */\n    this.coordinateCache_ = {};\n\n    /**\n     * @private\n     * @type {!import(\"../../transform.js\").Transform}\n     */\n    this.renderedTransform_ = createTransform();\n\n    /**\n     * @protected\n     * @type {Array<*>}\n     */\n    this.hitDetectionInstructions = [];\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.pixelCoordinates_ = null;\n\n    /**\n     * @protected\n     * @type {import(\"../canvas.js\").FillStrokeState}\n     */\n    this.state = /** @type {import(\"../canvas.js\").FillStrokeState} */ ({});\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.viewRotation_ = 0;\n\n  }\n\n  if ( VectorContext ) CanvasReplay.__proto__ = VectorContext;\n  CanvasReplay.prototype = Object.create( VectorContext && VectorContext.prototype );\n  CanvasReplay.prototype.constructor = CanvasReplay;\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../coordinate.js\").Coordinate} p1 1st point of the background box.\n   * @param {import(\"../../coordinate.js\").Coordinate} p2 2nd point of the background box.\n   * @param {import(\"../../coordinate.js\").Coordinate} p3 3rd point of the background box.\n   * @param {import(\"../../coordinate.js\").Coordinate} p4 4th point of the background box.\n   * @param {Array<*>} fillInstruction Fill instruction.\n   * @param {Array<*>} strokeInstruction Stroke instruction.\n   */\n  CanvasReplay.prototype.replayTextBackground_ = function replayTextBackground_ (context, p1, p2, p3, p4, fillInstruction, strokeInstruction) {\n    context.beginPath();\n    context.moveTo.apply(context, p1);\n    context.lineTo.apply(context, p2);\n    context.lineTo.apply(context, p3);\n    context.lineTo.apply(context, p4);\n    context.lineTo.apply(context, p1);\n    if (fillInstruction) {\n      this.alignFill_ = /** @type {boolean} */ (fillInstruction[2]);\n      this.fill_(context);\n    }\n    if (strokeInstruction) {\n      this.setStrokeStyle_(context, /** @type {Array<*>} */ (strokeInstruction));\n      context.stroke();\n    }\n  };\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {number} x X.\n   * @param {number} y Y.\n   * @param {HTMLImageElement|HTMLCanvasElement|HTMLVideoElement} image Image.\n   * @param {number} anchorX Anchor X.\n   * @param {number} anchorY Anchor Y.\n   * @param {import(\"../canvas.js\").DeclutterGroup} declutterGroup Declutter group.\n   * @param {number} height Height.\n   * @param {number} opacity Opacity.\n   * @param {number} originX Origin X.\n   * @param {number} originY Origin Y.\n   * @param {number} rotation Rotation.\n   * @param {number} scale Scale.\n   * @param {boolean} snapToPixel Snap to pixel.\n   * @param {number} width Width.\n   * @param {Array<number>} padding Padding.\n   * @param {Array<*>} fillInstruction Fill instruction.\n   * @param {Array<*>} strokeInstruction Stroke instruction.\n   */\n  CanvasReplay.prototype.replayImage_ = function replayImage_ (\n    context,\n    x,\n    y,\n    image,\n    anchorX,\n    anchorY,\n    declutterGroup,\n    height,\n    opacity,\n    originX,\n    originY,\n    rotation,\n    scale,\n    snapToPixel,\n    width,\n    padding,\n    fillInstruction,\n    strokeInstruction\n  ) {\n    var fillStroke = fillInstruction || strokeInstruction;\n    anchorX *= scale;\n    anchorY *= scale;\n    x -= anchorX;\n    y -= anchorY;\n\n    var w = (width + originX > image.width) ? image.width - originX : width;\n    var h = (height + originY > image.height) ? image.height - originY : height;\n    var boxW = padding[3] + w * scale + padding[1];\n    var boxH = padding[0] + h * scale + padding[2];\n    var boxX = x - padding[3];\n    var boxY = y - padding[0];\n\n    /** @type {import(\"../../coordinate.js\").Coordinate} */\n    var p1;\n    /** @type {import(\"../../coordinate.js\").Coordinate} */\n    var p2;\n    /** @type {import(\"../../coordinate.js\").Coordinate} */\n    var p3;\n    /** @type {import(\"../../coordinate.js\").Coordinate} */\n    var p4;\n    if (fillStroke || rotation !== 0) {\n      p1 = [boxX, boxY];\n      p2 = [boxX + boxW, boxY];\n      p3 = [boxX + boxW, boxY + boxH];\n      p4 = [boxX, boxY + boxH];\n    }\n\n    var transform = null;\n    if (rotation !== 0) {\n      var centerX = x + anchorX;\n      var centerY = y + anchorY;\n      transform = composeTransform(tmpTransform, centerX, centerY, 1, 1, rotation, -centerX, -centerY);\n\n      createOrUpdateEmpty(tmpExtent);\n      extendCoordinate(tmpExtent, applyTransform(tmpTransform, p1));\n      extendCoordinate(tmpExtent, applyTransform(tmpTransform, p2));\n      extendCoordinate(tmpExtent, applyTransform(tmpTransform, p3));\n      extendCoordinate(tmpExtent, applyTransform(tmpTransform, p4));\n    } else {\n      createOrUpdate(boxX, boxY, boxX + boxW, boxY + boxH, tmpExtent);\n    }\n    var canvas = context.canvas;\n    var strokePadding = strokeInstruction ? (strokeInstruction[2] * scale / 2) : 0;\n    var intersects =\n        tmpExtent[0] - strokePadding <= canvas.width && tmpExtent[2] + strokePadding >= 0 &&\n        tmpExtent[1] - strokePadding <= canvas.height && tmpExtent[3] + strokePadding >= 0;\n\n    if (snapToPixel) {\n      x = Math.round(x);\n      y = Math.round(y);\n    }\n\n    if (declutterGroup) {\n      if (!intersects && declutterGroup[4] == 1) {\n        return;\n      }\n      extend(declutterGroup, tmpExtent);\n      var declutterArgs = intersects ?\n        [context, transform ? transform.slice(0) : null, opacity, image, originX, originY, w, h, x, y, scale] :\n        null;\n      if (declutterArgs && fillStroke) {\n        declutterArgs.push(fillInstruction, strokeInstruction, p1, p2, p3, p4);\n      }\n      declutterGroup.push(declutterArgs);\n    } else if (intersects) {\n      if (fillStroke) {\n        this.replayTextBackground_(context, p1, p2, p3, p4,\n          /** @type {Array<*>} */ (fillInstruction),\n          /** @type {Array<*>} */ (strokeInstruction));\n      }\n      drawImage(context, transform, opacity, image, originX, originY, w, h, x, y, scale);\n    }\n  };\n\n  /**\n   * @protected\n   * @param {Array<number>} dashArray Dash array.\n   * @return {Array<number>} Dash array with pixel ratio applied\n   */\n  CanvasReplay.prototype.applyPixelRatio = function applyPixelRatio (dashArray) {\n    var pixelRatio = this.pixelRatio;\n    return pixelRatio == 1 ? dashArray : dashArray.map(function(dash) {\n      return dash * pixelRatio;\n    });\n  };\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @param {boolean} closed Last input coordinate equals first.\n   * @param {boolean} skipFirst Skip first coordinate.\n   * @protected\n   * @return {number} My end.\n   */\n  CanvasReplay.prototype.appendFlatCoordinates = function appendFlatCoordinates (flatCoordinates, offset, end, stride, closed, skipFirst) {\n\n    var myEnd = this.coordinates.length;\n    var extent = this.getBufferedMaxExtent();\n    if (skipFirst) {\n      offset += stride;\n    }\n    var lastCoord = [flatCoordinates[offset], flatCoordinates[offset + 1]];\n    var nextCoord = [NaN, NaN];\n    var skipped = true;\n\n    var i, lastRel, nextRel;\n    for (i = offset + stride; i < end; i += stride) {\n      nextCoord[0] = flatCoordinates[i];\n      nextCoord[1] = flatCoordinates[i + 1];\n      nextRel = coordinateRelationship(extent, nextCoord);\n      if (nextRel !== lastRel) {\n        if (skipped) {\n          this.coordinates[myEnd++] = lastCoord[0];\n          this.coordinates[myEnd++] = lastCoord[1];\n        }\n        this.coordinates[myEnd++] = nextCoord[0];\n        this.coordinates[myEnd++] = nextCoord[1];\n        skipped = false;\n      } else if (nextRel === Relationship.INTERSECTING) {\n        this.coordinates[myEnd++] = nextCoord[0];\n        this.coordinates[myEnd++] = nextCoord[1];\n        skipped = false;\n      } else {\n        skipped = true;\n      }\n      lastCoord[0] = nextCoord[0];\n      lastCoord[1] = nextCoord[1];\n      lastRel = nextRel;\n    }\n\n    // Last coordinate equals first or only one point to append:\n    if ((closed && skipped) || i === offset + stride) {\n      this.coordinates[myEnd++] = lastCoord[0];\n      this.coordinates[myEnd++] = lastCoord[1];\n    }\n    return myEnd;\n  };\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {Array<number>} ends Ends.\n   * @param {number} stride Stride.\n   * @param {Array<number>} replayEnds Replay ends.\n   * @return {number} Offset.\n   */\n  CanvasReplay.prototype.drawCustomCoordinates_ = function drawCustomCoordinates_ (flatCoordinates, offset, ends, stride, replayEnds) {\n    for (var i = 0, ii = ends.length; i < ii; ++i) {\n      var end = ends[i];\n      var replayEnd = this.appendFlatCoordinates(flatCoordinates, offset, end, stride, false, false);\n      replayEnds.push(replayEnd);\n      offset = end;\n    }\n    return offset;\n  };\n\n  /**\n   * @inheritDoc.\n   */\n  CanvasReplay.prototype.drawCustom = function drawCustom (geometry, feature, renderer) {\n    this.beginGeometry(geometry, feature);\n    var type = geometry.getType();\n    var stride = geometry.getStride();\n    var replayBegin = this.coordinates.length;\n    var flatCoordinates, replayEnd, replayEnds, replayEndss;\n    var offset;\n    if (type == GeometryType.MULTI_POLYGON) {\n      geometry = /** @type {import(\"../../geom/MultiPolygon.js\").default} */ (geometry);\n      flatCoordinates = geometry.getOrientedFlatCoordinates();\n      replayEndss = [];\n      var endss = geometry.getEndss();\n      offset = 0;\n      for (var i = 0, ii = endss.length; i < ii; ++i) {\n        var myEnds = [];\n        offset = this.drawCustomCoordinates_(flatCoordinates, offset, endss[i], stride, myEnds);\n        replayEndss.push(myEnds);\n      }\n      this.instructions.push([CanvasInstruction.CUSTOM,\n        replayBegin, replayEndss, geometry, renderer, inflateMultiCoordinatesArray]);\n    } else if (type == GeometryType.POLYGON || type == GeometryType.MULTI_LINE_STRING) {\n      replayEnds = [];\n      flatCoordinates = (type == GeometryType.POLYGON) ?\n        /** @type {import(\"../../geom/Polygon.js\").default} */ (geometry).getOrientedFlatCoordinates() :\n        geometry.getFlatCoordinates();\n      offset = this.drawCustomCoordinates_(flatCoordinates, 0,\n        /** @type {import(\"../../geom/Polygon.js\").default|import(\"../../geom/MultiLineString.js\").default} */ (geometry).getEnds(),\n        stride, replayEnds);\n      this.instructions.push([CanvasInstruction.CUSTOM,\n        replayBegin, replayEnds, geometry, renderer, inflateCoordinatesArray]);\n    } else if (type == GeometryType.LINE_STRING || type == GeometryType.MULTI_POINT) {\n      flatCoordinates = geometry.getFlatCoordinates();\n      replayEnd = this.appendFlatCoordinates(\n        flatCoordinates, 0, flatCoordinates.length, stride, false, false);\n      this.instructions.push([CanvasInstruction.CUSTOM,\n        replayBegin, replayEnd, geometry, renderer, inflateCoordinates]);\n    } else if (type == GeometryType.POINT) {\n      flatCoordinates = geometry.getFlatCoordinates();\n      this.coordinates.push(flatCoordinates[0], flatCoordinates[1]);\n      replayEnd = this.coordinates.length;\n      this.instructions.push([CanvasInstruction.CUSTOM,\n        replayBegin, replayEnd, geometry, renderer]);\n    }\n    this.endGeometry(geometry, feature);\n  };\n\n  /**\n   * @protected\n   * @param {import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default} geometry Geometry.\n   * @param {import(\"../../Feature.js\").default|import(\"../Feature.js\").default} feature Feature.\n   */\n  CanvasReplay.prototype.beginGeometry = function beginGeometry (geometry, feature) {\n    this.beginGeometryInstruction1_ = [CanvasInstruction.BEGIN_GEOMETRY, feature, 0];\n    this.instructions.push(this.beginGeometryInstruction1_);\n    this.beginGeometryInstruction2_ = [CanvasInstruction.BEGIN_GEOMETRY, feature, 0];\n    this.hitDetectionInstructions.push(this.beginGeometryInstruction2_);\n  };\n\n  /**\n   * FIXME empty description for jsdoc\n   */\n  CanvasReplay.prototype.finish = function finish () {};\n\n  /**\n   * @private\n   * @param {CanvasRenderingContext2D} context Context.\n   */\n  CanvasReplay.prototype.fill_ = function fill_ (context) {\n    if (this.alignFill_) {\n      var origin = applyTransform(this.renderedTransform_, [0, 0]);\n      var repeatSize = 512 * this.pixelRatio;\n      context.translate(origin[0] % repeatSize, origin[1] % repeatSize);\n      context.rotate(this.viewRotation_);\n    }\n    context.fill();\n    if (this.alignFill_) {\n      context.setTransform.apply(context, resetTransform);\n    }\n  };\n\n  /**\n   * @private\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {Array<*>} instruction Instruction.\n   */\n  CanvasReplay.prototype.setStrokeStyle_ = function setStrokeStyle_ (context, instruction) {\n    context.strokeStyle = /** @type {import(\"../../colorlike.js\").ColorLike} */ (instruction[1]);\n    context.lineWidth = /** @type {number} */ (instruction[2]);\n    context.lineCap = /** @type {CanvasLineCap} */ (instruction[3]);\n    context.lineJoin = /** @type {CanvasLineJoin} */ (instruction[4]);\n    context.miterLimit = /** @type {number} */ (instruction[5]);\n    if (CANVAS_LINE_DASH) {\n      context.lineDashOffset = /** @type {number} */ (instruction[7]);\n      context.setLineDash(/** @type {Array<number>} */ (instruction[6]));\n    }\n  };\n\n  /**\n   * @param {import(\"../canvas.js\").DeclutterGroup} declutterGroup Declutter group.\n   * @param {import(\"../../Feature.js\").default|import(\"../Feature.js\").default} feature Feature.\n   */\n  CanvasReplay.prototype.renderDeclutter_ = function renderDeclutter_ (declutterGroup, feature) {\n    if (declutterGroup && declutterGroup.length > 5) {\n      var groupCount = declutterGroup[4];\n      if (groupCount == 1 || groupCount == declutterGroup.length - 5) {\n        /** @type {import(\"../../structs/RBush.js\").Entry} */\n        var box = {\n          minX: /** @type {number} */ (declutterGroup[0]),\n          minY: /** @type {number} */ (declutterGroup[1]),\n          maxX: /** @type {number} */ (declutterGroup[2]),\n          maxY: /** @type {number} */ (declutterGroup[3]),\n          value: feature\n        };\n        if (!this.declutterTree.collides(box)) {\n          this.declutterTree.insert(box);\n          for (var j = 5, jj = declutterGroup.length; j < jj; ++j) {\n            var declutterData = /** @type {Array} */ (declutterGroup[j]);\n            if (declutterData) {\n              if (declutterData.length > 11) {\n                this.replayTextBackground_(declutterData[0],\n                  declutterData[13], declutterData[14], declutterData[15], declutterData[16],\n                  declutterData[11], declutterData[12]);\n              }\n              drawImage.apply(undefined, declutterData);\n            }\n          }\n        }\n        declutterGroup.length = 5;\n        createOrUpdateEmpty(declutterGroup);\n      }\n    }\n  };\n\n  /**\n   * @private\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../transform.js\").Transform} transform Transform.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features\n   *     to skip.\n   * @param {Array<*>} instructions Instructions array.\n   * @param {boolean} snapToPixel Snap point symbols and text to integer pixels.\n   * @param {function((import(\"../../Feature.js\").default|import(\"../Feature.js\").default)): T|undefined} featureCallback Feature callback.\n   * @param {import(\"../../extent.js\").Extent=} opt_hitExtent Only check features that intersect this\n   *     extent.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  CanvasReplay.prototype.replay_ = function replay_ (\n    context,\n    transform,\n    skippedFeaturesHash,\n    instructions,\n    snapToPixel,\n    featureCallback,\n    opt_hitExtent\n  ) {\n    /** @type {Array<number>} */\n    var pixelCoordinates;\n    if (this.pixelCoordinates_ && equals(transform, this.renderedTransform_)) {\n      pixelCoordinates = this.pixelCoordinates_;\n    } else {\n      if (!this.pixelCoordinates_) {\n        this.pixelCoordinates_ = [];\n      }\n      pixelCoordinates = transform2D(\n        this.coordinates, 0, this.coordinates.length, 2,\n        transform, this.pixelCoordinates_);\n      transformSetFromArray(this.renderedTransform_, transform);\n    }\n    var skipFeatures = !isEmpty(skippedFeaturesHash);\n    var i = 0; // instruction index\n    var ii = instructions.length; // end of instructions\n    var d = 0; // data index\n    var dd; // end of per-instruction data\n    var anchorX, anchorY, prevX, prevY, roundX, roundY, declutterGroup, image;\n    var pendingFill = 0;\n    var pendingStroke = 0;\n    var lastFillInstruction = null;\n    var lastStrokeInstruction = null;\n    var coordinateCache = this.coordinateCache_;\n    var viewRotation = this.viewRotation_;\n\n    var state = /** @type {import(\"../../render.js\").State} */ ({\n      context: context,\n      pixelRatio: this.pixelRatio,\n      resolution: this.resolution,\n      rotation: viewRotation\n    });\n\n    // When the batch size gets too big, performance decreases. 200 is a good\n    // balance between batch size and number of fill/stroke instructions.\n    var batchSize = this.instructions != instructions || this.overlaps ? 0 : 200;\n    var /** @type {import(\"../../Feature.js\").default|import(\"../Feature.js\").default} */ feature;\n    var x, y;\n    while (i < ii) {\n      var instruction = instructions[i];\n      var type = /** @type {CanvasInstruction} */ (instruction[0]);\n      switch (type) {\n        case CanvasInstruction.BEGIN_GEOMETRY:\n          feature = /** @type {import(\"../../Feature.js\").default|import(\"../Feature.js\").default} */ (instruction[1]);\n          if ((skipFeatures && skippedFeaturesHash[getUid(feature)]) || !feature.getGeometry()) {\n            i = /** @type {number} */ (instruction[2]);\n          } else if (opt_hitExtent !== undefined && !intersects(\n            opt_hitExtent, feature.getGeometry().getExtent())) {\n            i = /** @type {number} */ (instruction[2]) + 1;\n          } else {\n            ++i;\n          }\n          break;\n        case CanvasInstruction.BEGIN_PATH:\n          if (pendingFill > batchSize) {\n            this.fill_(context);\n            pendingFill = 0;\n          }\n          if (pendingStroke > batchSize) {\n            context.stroke();\n            pendingStroke = 0;\n          }\n          if (!pendingFill && !pendingStroke) {\n            context.beginPath();\n            prevX = prevY = NaN;\n          }\n          ++i;\n          break;\n        case CanvasInstruction.CIRCLE:\n          d = /** @type {number} */ (instruction[1]);\n          var x1 = pixelCoordinates[d];\n          var y1 = pixelCoordinates[d + 1];\n          var x2 = pixelCoordinates[d + 2];\n          var y2 = pixelCoordinates[d + 3];\n          var dx = x2 - x1;\n          var dy = y2 - y1;\n          var r = Math.sqrt(dx * dx + dy * dy);\n          context.moveTo(x1 + r, y1);\n          context.arc(x1, y1, r, 0, 2 * Math.PI, true);\n          ++i;\n          break;\n        case CanvasInstruction.CLOSE_PATH:\n          context.closePath();\n          ++i;\n          break;\n        case CanvasInstruction.CUSTOM:\n          d = /** @type {number} */ (instruction[1]);\n          dd = instruction[2];\n          var geometry = /** @type {import(\"../../geom/SimpleGeometry.js\").default} */ (instruction[3]);\n          var renderer = instruction[4];\n          var fn = instruction.length == 6 ? instruction[5] : undefined;\n          state.geometry = geometry;\n          state.feature = feature;\n          if (!(i in coordinateCache)) {\n            coordinateCache[i] = [];\n          }\n          var coords = coordinateCache[i];\n          if (fn) {\n            fn(pixelCoordinates, d, dd, 2, coords);\n          } else {\n            coords[0] = pixelCoordinates[d];\n            coords[1] = pixelCoordinates[d + 1];\n            coords.length = 2;\n          }\n          renderer(coords, state);\n          ++i;\n          break;\n        case CanvasInstruction.DRAW_IMAGE:\n          d = /** @type {number} */ (instruction[1]);\n          dd = /** @type {number} */ (instruction[2]);\n          image = /** @type {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement} */\n              (instruction[3]);\n          // Remaining arguments in DRAW_IMAGE are in alphabetical order\n          anchorX = /** @type {number} */ (instruction[4]);\n          anchorY = /** @type {number} */ (instruction[5]);\n          declutterGroup = featureCallback ? null : /** @type {import(\"../canvas.js\").DeclutterGroup} */ (instruction[6]);\n          var height = /** @type {number} */ (instruction[7]);\n          var opacity = /** @type {number} */ (instruction[8]);\n          var originX = /** @type {number} */ (instruction[9]);\n          var originY = /** @type {number} */ (instruction[10]);\n          var rotateWithView = /** @type {boolean} */ (instruction[11]);\n          var rotation = /** @type {number} */ (instruction[12]);\n          var scale = /** @type {number} */ (instruction[13]);\n          var width = /** @type {number} */ (instruction[14]);\n\n          var padding = (void 0), backgroundFill = (void 0), backgroundStroke = (void 0);\n          if (instruction.length > 16) {\n            padding = /** @type {Array<number>} */ (instruction[15]);\n            backgroundFill = /** @type {boolean} */ (instruction[16]);\n            backgroundStroke = /** @type {boolean} */ (instruction[17]);\n          } else {\n            padding = defaultPadding;\n            backgroundFill = backgroundStroke = false;\n          }\n\n          if (rotateWithView) {\n            rotation += viewRotation;\n          }\n          for (; d < dd; d += 2) {\n            this.replayImage_(context,\n              pixelCoordinates[d], pixelCoordinates[d + 1], image, anchorX, anchorY,\n              declutterGroup, height, opacity, originX, originY, rotation, scale,\n              snapToPixel, width, padding,\n              backgroundFill ? /** @type {Array<*>} */ (lastFillInstruction) : null,\n              backgroundStroke ? /** @type {Array<*>} */ (lastStrokeInstruction) : null);\n          }\n          this.renderDeclutter_(declutterGroup, feature);\n          ++i;\n          break;\n        case CanvasInstruction.DRAW_CHARS:\n          var begin = /** @type {number} */ (instruction[1]);\n          var end = /** @type {number} */ (instruction[2]);\n          var baseline = /** @type {number} */ (instruction[3]);\n          declutterGroup = featureCallback ? null : /** @type {import(\"../canvas.js\").DeclutterGroup} */ (instruction[4]);\n          var overflow = /** @type {number} */ (instruction[5]);\n          var fillKey = /** @type {string} */ (instruction[6]);\n          var maxAngle = /** @type {number} */ (instruction[7]);\n          var measure = /** @type {function(string):number} */ (instruction[8]);\n          var offsetY = /** @type {number} */ (instruction[9]);\n          var strokeKey = /** @type {string} */ (instruction[10]);\n          var strokeWidth = /** @type {number} */ (instruction[11]);\n          var text = /** @type {string} */ (instruction[12]);\n          var textKey = /** @type {string} */ (instruction[13]);\n          var textScale = /** @type {number} */ (instruction[14]);\n\n          var pathLength = lineStringLength(pixelCoordinates, begin, end, 2);\n          var textLength = measure(text);\n          if (overflow || textLength <= pathLength) {\n            /** @type {import(\"./TextReplay.js\").default} */\n            var textReplay = /** @type {?} */ (this);\n            var textAlign = textReplay.textStates[textKey].textAlign;\n            var startM = (pathLength - textLength) * TEXT_ALIGN[textAlign];\n            var parts = drawTextOnPath(\n              pixelCoordinates, begin, end, 2, text, measure, startM, maxAngle);\n            if (parts) {\n              var c = (void 0), cc = (void 0), chars = (void 0), label = (void 0), part = (void 0);\n              if (strokeKey) {\n                for (c = 0, cc = parts.length; c < cc; ++c) {\n                  part = parts[c]; // x, y, anchorX, rotation, chunk\n                  chars = /** @type {string} */ (part[4]);\n                  label = textReplay.getImage(chars, textKey, '', strokeKey);\n                  anchorX = /** @type {number} */ (part[2]) + strokeWidth;\n                  anchorY = baseline * label.height + (0.5 - baseline) * 2 * strokeWidth - offsetY;\n                  this.replayImage_(context,\n                    /** @type {number} */ (part[0]), /** @type {number} */ (part[1]), label,\n                    anchorX, anchorY, declutterGroup, label.height, 1, 0, 0,\n                    /** @type {number} */ (part[3]), textScale, false, label.width,\n                    defaultPadding, null, null);\n                }\n              }\n              if (fillKey) {\n                for (c = 0, cc = parts.length; c < cc; ++c) {\n                  part = parts[c]; // x, y, anchorX, rotation, chunk\n                  chars = /** @type {string} */ (part[4]);\n                  label = textReplay.getImage(chars, textKey, fillKey, '');\n                  anchorX = /** @type {number} */ (part[2]);\n                  anchorY = baseline * label.height - offsetY;\n                  this.replayImage_(context,\n                    /** @type {number} */ (part[0]), /** @type {number} */ (part[1]), label,\n                    anchorX, anchorY, declutterGroup, label.height, 1, 0, 0,\n                    /** @type {number} */ (part[3]), textScale, false, label.width,\n                    defaultPadding, null, null);\n                }\n              }\n            }\n          }\n          this.renderDeclutter_(declutterGroup, feature);\n          ++i;\n          break;\n        case CanvasInstruction.END_GEOMETRY:\n          if (featureCallback !== undefined) {\n            feature = /** @type {import(\"../../Feature.js\").default|import(\"../Feature.js\").default} */ (instruction[1]);\n            var result = featureCallback(feature);\n            if (result) {\n              return result;\n            }\n          }\n          ++i;\n          break;\n        case CanvasInstruction.FILL:\n          if (batchSize) {\n            pendingFill++;\n          } else {\n            this.fill_(context);\n          }\n          ++i;\n          break;\n        case CanvasInstruction.MOVE_TO_LINE_TO:\n          d = /** @type {number} */ (instruction[1]);\n          dd = /** @type {number} */ (instruction[2]);\n          x = pixelCoordinates[d];\n          y = pixelCoordinates[d + 1];\n          roundX = (x + 0.5) | 0;\n          roundY = (y + 0.5) | 0;\n          if (roundX !== prevX || roundY !== prevY) {\n            context.moveTo(x, y);\n            prevX = roundX;\n            prevY = roundY;\n          }\n          for (d += 2; d < dd; d += 2) {\n            x = pixelCoordinates[d];\n            y = pixelCoordinates[d + 1];\n            roundX = (x + 0.5) | 0;\n            roundY = (y + 0.5) | 0;\n            if (d == dd - 2 || roundX !== prevX || roundY !== prevY) {\n              context.lineTo(x, y);\n              prevX = roundX;\n              prevY = roundY;\n            }\n          }\n          ++i;\n          break;\n        case CanvasInstruction.SET_FILL_STYLE:\n          lastFillInstruction = instruction;\n          this.alignFill_ = instruction[2];\n\n          if (pendingFill) {\n            this.fill_(context);\n            pendingFill = 0;\n            if (pendingStroke) {\n              context.stroke();\n              pendingStroke = 0;\n            }\n          }\n\n          context.fillStyle = /** @type {import(\"../../colorlike.js\").ColorLike} */ (instruction[1]);\n          ++i;\n          break;\n        case CanvasInstruction.SET_STROKE_STYLE:\n          lastStrokeInstruction = instruction;\n          if (pendingStroke) {\n            context.stroke();\n            pendingStroke = 0;\n          }\n          this.setStrokeStyle_(context, /** @type {Array<*>} */ (instruction));\n          ++i;\n          break;\n        case CanvasInstruction.STROKE:\n          if (batchSize) {\n            pendingStroke++;\n          } else {\n            context.stroke();\n          }\n          ++i;\n          break;\n        default:\n          ++i; // consume the instruction anyway, to avoid an infinite loop\n          break;\n      }\n    }\n    if (pendingFill) {\n      this.fill_(context);\n    }\n    if (pendingStroke) {\n      context.stroke();\n    }\n    return undefined;\n  };\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../transform.js\").Transform} transform Transform.\n   * @param {number} viewRotation View rotation.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features\n   *     to skip.\n   * @param {boolean} snapToPixel Snap point symbols and text to integer pixels.\n   */\n  CanvasReplay.prototype.replay = function replay (context, transform, viewRotation, skippedFeaturesHash, snapToPixel) {\n    this.viewRotation_ = viewRotation;\n    this.replay_(context, transform,\n      skippedFeaturesHash, this.instructions, snapToPixel, undefined, undefined);\n  };\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../transform.js\").Transform} transform Transform.\n   * @param {number} viewRotation View rotation.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features\n   *     to skip.\n   * @param {function((import(\"../../Feature.js\").default|import(\"../Feature.js\").default)): T=} opt_featureCallback\n   *     Feature callback.\n   * @param {import(\"../../extent.js\").Extent=} opt_hitExtent Only check features that intersect this\n   *     extent.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  CanvasReplay.prototype.replayHitDetection = function replayHitDetection (\n    context,\n    transform,\n    viewRotation,\n    skippedFeaturesHash,\n    opt_featureCallback,\n    opt_hitExtent\n  ) {\n    this.viewRotation_ = viewRotation;\n    return this.replay_(context, transform, skippedFeaturesHash,\n      this.hitDetectionInstructions, true, opt_featureCallback, opt_hitExtent);\n  };\n\n  /**\n   * Reverse the hit detection instructions.\n   */\n  CanvasReplay.prototype.reverseHitDetectionInstructions = function reverseHitDetectionInstructions () {\n    var hitDetectionInstructions = this.hitDetectionInstructions;\n    // step 1 - reverse array\n    hitDetectionInstructions.reverse();\n    // step 2 - reverse instructions within geometry blocks\n    var i;\n    var n = hitDetectionInstructions.length;\n    var instruction;\n    var type;\n    var begin = -1;\n    for (i = 0; i < n; ++i) {\n      instruction = hitDetectionInstructions[i];\n      type = /** @type {CanvasInstruction} */ (instruction[0]);\n      if (type == CanvasInstruction.END_GEOMETRY) {\n        begin = i;\n      } else if (type == CanvasInstruction.BEGIN_GEOMETRY) {\n        instruction[2] = i;\n        reverseSubArray(this.hitDetectionInstructions, begin, i);\n        begin = -1;\n      }\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasReplay.prototype.setFillStrokeStyle = function setFillStrokeStyle (fillStyle, strokeStyle) {\n    var state = this.state;\n    if (fillStyle) {\n      var fillStyleColor = fillStyle.getColor();\n      state.fillStyle = asColorLike(fillStyleColor ?\n        fillStyleColor : defaultFillStyle);\n    } else {\n      state.fillStyle = undefined;\n    }\n    if (strokeStyle) {\n      var strokeStyleColor = strokeStyle.getColor();\n      state.strokeStyle = asColorLike(strokeStyleColor ?\n        strokeStyleColor : defaultStrokeStyle);\n      var strokeStyleLineCap = strokeStyle.getLineCap();\n      state.lineCap = strokeStyleLineCap !== undefined ?\n        strokeStyleLineCap : defaultLineCap;\n      var strokeStyleLineDash = strokeStyle.getLineDash();\n      state.lineDash = strokeStyleLineDash ?\n        strokeStyleLineDash.slice() : defaultLineDash;\n      var strokeStyleLineDashOffset = strokeStyle.getLineDashOffset();\n      state.lineDashOffset = strokeStyleLineDashOffset ?\n        strokeStyleLineDashOffset : defaultLineDashOffset;\n      var strokeStyleLineJoin = strokeStyle.getLineJoin();\n      state.lineJoin = strokeStyleLineJoin !== undefined ?\n        strokeStyleLineJoin : defaultLineJoin;\n      var strokeStyleWidth = strokeStyle.getWidth();\n      state.lineWidth = strokeStyleWidth !== undefined ?\n        strokeStyleWidth : defaultLineWidth;\n      var strokeStyleMiterLimit = strokeStyle.getMiterLimit();\n      state.miterLimit = strokeStyleMiterLimit !== undefined ?\n        strokeStyleMiterLimit : defaultMiterLimit;\n\n      if (state.lineWidth > this.maxLineWidth) {\n        this.maxLineWidth = state.lineWidth;\n        // invalidate the buffered max extent cache\n        this.bufferedMaxExtent_ = null;\n      }\n    } else {\n      state.strokeStyle = undefined;\n      state.lineCap = undefined;\n      state.lineDash = null;\n      state.lineDashOffset = undefined;\n      state.lineJoin = undefined;\n      state.lineWidth = undefined;\n      state.miterLimit = undefined;\n    }\n  };\n\n  /**\n   * @param {import(\"../canvas.js\").FillStrokeState} state State.\n   * @param {import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default} geometry Geometry.\n   * @return {Array<*>} Fill instruction.\n   */\n  CanvasReplay.prototype.createFill = function createFill (state, geometry) {\n    var fillStyle = state.fillStyle;\n    /** @type {Array<*>} */\n    var fillInstruction = [CanvasInstruction.SET_FILL_STYLE, fillStyle];\n    if (typeof fillStyle !== 'string') {\n      // Fill is a pattern or gradient - align it!\n      fillInstruction.push(true);\n    }\n    return fillInstruction;\n  };\n\n  /**\n   * @param {import(\"../canvas.js\").FillStrokeState} state State.\n   */\n  CanvasReplay.prototype.applyStroke = function applyStroke (state) {\n    this.instructions.push(this.createStroke(state));\n  };\n\n  /**\n   * @param {import(\"../canvas.js\").FillStrokeState} state State.\n   * @return {Array<*>} Stroke instruction.\n   */\n  CanvasReplay.prototype.createStroke = function createStroke (state) {\n    return [\n      CanvasInstruction.SET_STROKE_STYLE,\n      state.strokeStyle, state.lineWidth * this.pixelRatio, state.lineCap,\n      state.lineJoin, state.miterLimit,\n      this.applyPixelRatio(state.lineDash), state.lineDashOffset * this.pixelRatio\n    ];\n  };\n\n  /**\n   * @param {import(\"../canvas.js\").FillStrokeState} state State.\n   * @param {function(this:CanvasReplay, import(\"../canvas.js\").FillStrokeState, (import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default)):Array<*>} createFill Create fill.\n   * @param {import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default} geometry Geometry.\n   */\n  CanvasReplay.prototype.updateFillStyle = function updateFillStyle (state, createFill, geometry) {\n    var fillStyle = state.fillStyle;\n    if (typeof fillStyle !== 'string' || state.currentFillStyle != fillStyle) {\n      if (fillStyle !== undefined) {\n        this.instructions.push(createFill.call(this, state, geometry));\n      }\n      state.currentFillStyle = fillStyle;\n    }\n  };\n\n  /**\n   * @param {import(\"../canvas.js\").FillStrokeState} state State.\n   * @param {function(this:CanvasReplay, import(\"../canvas.js\").FillStrokeState)} applyStroke Apply stroke.\n   */\n  CanvasReplay.prototype.updateStrokeStyle = function updateStrokeStyle (state, applyStroke) {\n    var strokeStyle = state.strokeStyle;\n    var lineCap = state.lineCap;\n    var lineDash = state.lineDash;\n    var lineDashOffset = state.lineDashOffset;\n    var lineJoin = state.lineJoin;\n    var lineWidth = state.lineWidth;\n    var miterLimit = state.miterLimit;\n    if (state.currentStrokeStyle != strokeStyle ||\n        state.currentLineCap != lineCap ||\n        (lineDash != state.currentLineDash && !equals(state.currentLineDash, lineDash)) ||\n        state.currentLineDashOffset != lineDashOffset ||\n        state.currentLineJoin != lineJoin ||\n        state.currentLineWidth != lineWidth ||\n        state.currentMiterLimit != miterLimit) {\n      if (strokeStyle !== undefined) {\n        applyStroke.call(this, state);\n      }\n      state.currentStrokeStyle = strokeStyle;\n      state.currentLineCap = lineCap;\n      state.currentLineDash = lineDash;\n      state.currentLineDashOffset = lineDashOffset;\n      state.currentLineJoin = lineJoin;\n      state.currentLineWidth = lineWidth;\n      state.currentMiterLimit = miterLimit;\n    }\n  };\n\n  /**\n   * @param {import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default} geometry Geometry.\n   * @param {import(\"../../Feature.js\").default|import(\"../Feature.js\").default} feature Feature.\n   */\n  CanvasReplay.prototype.endGeometry = function endGeometry (geometry, feature) {\n    this.beginGeometryInstruction1_[2] = this.instructions.length;\n    this.beginGeometryInstruction1_ = null;\n    this.beginGeometryInstruction2_[2] = this.hitDetectionInstructions.length;\n    this.beginGeometryInstruction2_ = null;\n    var endGeometryInstruction = [CanvasInstruction.END_GEOMETRY, feature];\n    this.instructions.push(endGeometryInstruction);\n    this.hitDetectionInstructions.push(endGeometryInstruction);\n  };\n\n  /**\n   * Get the buffered rendering extent.  Rendering will be clipped to the extent\n   * provided to the constructor.  To account for symbolizers that may intersect\n   * this extent, we calculate a buffered extent (e.g. based on stroke width).\n   * @return {import(\"../../extent.js\").Extent} The buffered rendering extent.\n   * @protected\n   */\n  CanvasReplay.prototype.getBufferedMaxExtent = function getBufferedMaxExtent () {\n    if (!this.bufferedMaxExtent_) {\n      this.bufferedMaxExtent_ = clone(this.maxExtent);\n      if (this.maxLineWidth > 0) {\n        var width = this.resolution * (this.maxLineWidth + 1) / 2;\n        buffer(this.bufferedMaxExtent_, width, this.bufferedMaxExtent_);\n      }\n    }\n    return this.bufferedMaxExtent_;\n  };\n\n  return CanvasReplay;\n}(VectorContext));\n\n\nexport default CanvasReplay;\n\n//# sourceMappingURL=Replay.js.map","/**\n * @module ol/render/canvas/ImageReplay\n */\nimport CanvasInstruction from './Instruction.js';\nimport CanvasReplay from './Replay.js';\n\nvar CanvasImageReplay = /*@__PURE__*/(function (CanvasReplay) {\n  function CanvasImageReplay(tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree) {\n    CanvasReplay.call(this, tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree);\n\n    /**\n     * @private\n     * @type {import(\"../canvas.js\").DeclutterGroup}\n     */\n    this.declutterGroup_ = null;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement}\n     */\n    this.hitDetectionImage_ = null;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement}\n     */\n    this.image_ = null;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.anchorX_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.anchorY_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.height_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.opacity_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.originX_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.originY_ = undefined;\n\n    /**\n     * @private\n     * @type {boolean|undefined}\n     */\n    this.rotateWithView_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.rotation_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.scale_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.width_ = undefined;\n\n  }\n\n  if ( CanvasReplay ) CanvasImageReplay.__proto__ = CanvasReplay;\n  CanvasImageReplay.prototype = Object.create( CanvasReplay && CanvasReplay.prototype );\n  CanvasImageReplay.prototype.constructor = CanvasImageReplay;\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @private\n   * @return {number} My end.\n   */\n  CanvasImageReplay.prototype.drawCoordinates_ = function drawCoordinates_ (flatCoordinates, offset, end, stride) {\n    return this.appendFlatCoordinates(flatCoordinates, offset, end, stride, false, false);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasImageReplay.prototype.drawPoint = function drawPoint (pointGeometry, feature) {\n    if (!this.image_) {\n      return;\n    }\n    this.beginGeometry(pointGeometry, feature);\n    var flatCoordinates = pointGeometry.getFlatCoordinates();\n    var stride = pointGeometry.getStride();\n    var myBegin = this.coordinates.length;\n    var myEnd = this.drawCoordinates_(flatCoordinates, 0, flatCoordinates.length, stride);\n    this.instructions.push([\n      CanvasInstruction.DRAW_IMAGE, myBegin, myEnd, this.image_,\n      // Remaining arguments to DRAW_IMAGE are in alphabetical order\n      this.anchorX_, this.anchorY_, this.declutterGroup_, this.height_, this.opacity_,\n      this.originX_, this.originY_, this.rotateWithView_, this.rotation_,\n      this.scale_ * this.pixelRatio, this.width_\n    ]);\n    this.hitDetectionInstructions.push([\n      CanvasInstruction.DRAW_IMAGE, myBegin, myEnd, this.hitDetectionImage_,\n      // Remaining arguments to DRAW_IMAGE are in alphabetical order\n      this.anchorX_, this.anchorY_, this.declutterGroup_, this.height_, this.opacity_,\n      this.originX_, this.originY_, this.rotateWithView_, this.rotation_,\n      this.scale_, this.width_\n    ]);\n    this.endGeometry(pointGeometry, feature);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasImageReplay.prototype.drawMultiPoint = function drawMultiPoint (multiPointGeometry, feature) {\n    if (!this.image_) {\n      return;\n    }\n    this.beginGeometry(multiPointGeometry, feature);\n    var flatCoordinates = multiPointGeometry.getFlatCoordinates();\n    var stride = multiPointGeometry.getStride();\n    var myBegin = this.coordinates.length;\n    var myEnd = this.drawCoordinates_(\n      flatCoordinates, 0, flatCoordinates.length, stride);\n    this.instructions.push([\n      CanvasInstruction.DRAW_IMAGE, myBegin, myEnd, this.image_,\n      // Remaining arguments to DRAW_IMAGE are in alphabetical order\n      this.anchorX_, this.anchorY_, this.declutterGroup_, this.height_, this.opacity_,\n      this.originX_, this.originY_, this.rotateWithView_, this.rotation_,\n      this.scale_ * this.pixelRatio, this.width_\n    ]);\n    this.hitDetectionInstructions.push([\n      CanvasInstruction.DRAW_IMAGE, myBegin, myEnd, this.hitDetectionImage_,\n      // Remaining arguments to DRAW_IMAGE are in alphabetical order\n      this.anchorX_, this.anchorY_, this.declutterGroup_, this.height_, this.opacity_,\n      this.originX_, this.originY_, this.rotateWithView_, this.rotation_,\n      this.scale_, this.width_\n    ]);\n    this.endGeometry(multiPointGeometry, feature);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasImageReplay.prototype.finish = function finish () {\n    this.reverseHitDetectionInstructions();\n    // FIXME this doesn't really protect us against further calls to draw*Geometry\n    this.anchorX_ = undefined;\n    this.anchorY_ = undefined;\n    this.hitDetectionImage_ = null;\n    this.image_ = null;\n    this.height_ = undefined;\n    this.scale_ = undefined;\n    this.opacity_ = undefined;\n    this.originX_ = undefined;\n    this.originY_ = undefined;\n    this.rotateWithView_ = undefined;\n    this.rotation_ = undefined;\n    this.width_ = undefined;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasImageReplay.prototype.setImageStyle = function setImageStyle (imageStyle, declutterGroup) {\n    var anchor = imageStyle.getAnchor();\n    var size = imageStyle.getSize();\n    var hitDetectionImage = imageStyle.getHitDetectionImage(1);\n    var image = imageStyle.getImage(1);\n    var origin = imageStyle.getOrigin();\n    this.anchorX_ = anchor[0];\n    this.anchorY_ = anchor[1];\n    this.declutterGroup_ = /** @type {import(\"../canvas.js\").DeclutterGroup} */ (declutterGroup);\n    this.hitDetectionImage_ = hitDetectionImage;\n    this.image_ = image;\n    this.height_ = size[1];\n    this.opacity_ = imageStyle.getOpacity();\n    this.originX_ = origin[0];\n    this.originY_ = origin[1];\n    this.rotateWithView_ = imageStyle.getRotateWithView();\n    this.rotation_ = imageStyle.getRotation();\n    this.scale_ = imageStyle.getScale();\n    this.width_ = size[0];\n  };\n\n  return CanvasImageReplay;\n}(CanvasReplay));\n\n\nexport default CanvasImageReplay;\n\n//# sourceMappingURL=ImageReplay.js.map","/**\n * @module ol/render/canvas/LineStringReplay\n */\nimport CanvasInstruction, {strokeInstruction, beginPathInstruction} from './Instruction.js';\nimport CanvasReplay from './Replay.js';\n\nvar CanvasLineStringReplay = /*@__PURE__*/(function (CanvasReplay) {\n  function CanvasLineStringReplay(tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree) {\n    CanvasReplay.call(this, tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree);\n  }\n\n  if ( CanvasReplay ) CanvasLineStringReplay.__proto__ = CanvasReplay;\n  CanvasLineStringReplay.prototype = Object.create( CanvasReplay && CanvasReplay.prototype );\n  CanvasLineStringReplay.prototype.constructor = CanvasLineStringReplay;\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @private\n   * @return {number} end.\n   */\n  CanvasLineStringReplay.prototype.drawFlatCoordinates_ = function drawFlatCoordinates_ (flatCoordinates, offset, end, stride) {\n    var myBegin = this.coordinates.length;\n    var myEnd = this.appendFlatCoordinates(\n      flatCoordinates, offset, end, stride, false, false);\n    var moveToLineToInstruction = [CanvasInstruction.MOVE_TO_LINE_TO, myBegin, myEnd];\n    this.instructions.push(moveToLineToInstruction);\n    this.hitDetectionInstructions.push(moveToLineToInstruction);\n    return end;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasLineStringReplay.prototype.drawLineString = function drawLineString (lineStringGeometry, feature) {\n    var state = this.state;\n    var strokeStyle = state.strokeStyle;\n    var lineWidth = state.lineWidth;\n    if (strokeStyle === undefined || lineWidth === undefined) {\n      return;\n    }\n    this.updateStrokeStyle(state, this.applyStroke);\n    this.beginGeometry(lineStringGeometry, feature);\n    this.hitDetectionInstructions.push([\n      CanvasInstruction.SET_STROKE_STYLE,\n      state.strokeStyle, state.lineWidth, state.lineCap, state.lineJoin,\n      state.miterLimit, state.lineDash, state.lineDashOffset\n    ], beginPathInstruction);\n    var flatCoordinates = lineStringGeometry.getFlatCoordinates();\n    var stride = lineStringGeometry.getStride();\n    this.drawFlatCoordinates_(flatCoordinates, 0, flatCoordinates.length, stride);\n    this.hitDetectionInstructions.push(strokeInstruction);\n    this.endGeometry(lineStringGeometry, feature);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasLineStringReplay.prototype.drawMultiLineString = function drawMultiLineString (multiLineStringGeometry, feature) {\n    var state = this.state;\n    var strokeStyle = state.strokeStyle;\n    var lineWidth = state.lineWidth;\n    if (strokeStyle === undefined || lineWidth === undefined) {\n      return;\n    }\n    this.updateStrokeStyle(state, this.applyStroke);\n    this.beginGeometry(multiLineStringGeometry, feature);\n    this.hitDetectionInstructions.push([\n      CanvasInstruction.SET_STROKE_STYLE,\n      state.strokeStyle, state.lineWidth, state.lineCap, state.lineJoin,\n      state.miterLimit, state.lineDash, state.lineDashOffset\n    ], beginPathInstruction);\n    var ends = multiLineStringGeometry.getEnds();\n    var flatCoordinates = multiLineStringGeometry.getFlatCoordinates();\n    var stride = multiLineStringGeometry.getStride();\n    var offset = 0;\n    for (var i = 0, ii = ends.length; i < ii; ++i) {\n      offset = this.drawFlatCoordinates_(flatCoordinates, offset, ends[i], stride);\n    }\n    this.hitDetectionInstructions.push(strokeInstruction);\n    this.endGeometry(multiLineStringGeometry, feature);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasLineStringReplay.prototype.finish = function finish () {\n    var state = this.state;\n    if (state.lastStroke != undefined && state.lastStroke != this.coordinates.length) {\n      this.instructions.push(strokeInstruction);\n    }\n    this.reverseHitDetectionInstructions();\n    this.state = null;\n  };\n\n  /**\n   * @inheritDoc.\n   */\n  CanvasLineStringReplay.prototype.applyStroke = function applyStroke (state) {\n    if (state.lastStroke != undefined && state.lastStroke != this.coordinates.length) {\n      this.instructions.push(strokeInstruction);\n      state.lastStroke = this.coordinates.length;\n    }\n    state.lastStroke = 0;\n    CanvasReplay.prototype.applyStroke.call(this, state);\n    this.instructions.push(beginPathInstruction);\n  };\n\n  return CanvasLineStringReplay;\n}(CanvasReplay));\n\n\nexport default CanvasLineStringReplay;\n\n//# sourceMappingURL=LineStringReplay.js.map","/**\n * @module ol/render/canvas/PolygonReplay\n */\nimport {asString} from '../../color.js';\nimport {snap} from '../../geom/flat/simplify.js';\nimport {defaultFillStyle} from '../canvas.js';\nimport CanvasInstruction, {\n  fillInstruction, strokeInstruction, beginPathInstruction, closePathInstruction\n} from './Instruction.js';\nimport CanvasReplay from './Replay.js';\n\n\nvar CanvasPolygonReplay = /*@__PURE__*/(function (CanvasReplay) {\n  function CanvasPolygonReplay(tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree) {\n    CanvasReplay.call(this, tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree);\n  }\n\n  if ( CanvasReplay ) CanvasPolygonReplay.__proto__ = CanvasReplay;\n  CanvasPolygonReplay.prototype = Object.create( CanvasReplay && CanvasReplay.prototype );\n  CanvasPolygonReplay.prototype.constructor = CanvasPolygonReplay;\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {Array<number>} ends Ends.\n   * @param {number} stride Stride.\n   * @private\n   * @return {number} End.\n   */\n  CanvasPolygonReplay.prototype.drawFlatCoordinatess_ = function drawFlatCoordinatess_ (flatCoordinates, offset, ends, stride) {\n    var state = this.state;\n    var fill = state.fillStyle !== undefined;\n    var stroke = state.strokeStyle != undefined;\n    var numEnds = ends.length;\n    this.instructions.push(beginPathInstruction);\n    this.hitDetectionInstructions.push(beginPathInstruction);\n    for (var i = 0; i < numEnds; ++i) {\n      var end = ends[i];\n      var myBegin = this.coordinates.length;\n      var myEnd = this.appendFlatCoordinates(flatCoordinates, offset, end, stride, true, !stroke);\n      var moveToLineToInstruction = [CanvasInstruction.MOVE_TO_LINE_TO, myBegin, myEnd];\n      this.instructions.push(moveToLineToInstruction);\n      this.hitDetectionInstructions.push(moveToLineToInstruction);\n      if (stroke) {\n        // Performance optimization: only call closePath() when we have a stroke.\n        // Otherwise the ring is closed already (see appendFlatCoordinates above).\n        this.instructions.push(closePathInstruction);\n        this.hitDetectionInstructions.push(closePathInstruction);\n      }\n      offset = end;\n    }\n    if (fill) {\n      this.instructions.push(fillInstruction);\n      this.hitDetectionInstructions.push(fillInstruction);\n    }\n    if (stroke) {\n      this.instructions.push(strokeInstruction);\n      this.hitDetectionInstructions.push(strokeInstruction);\n    }\n    return offset;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasPolygonReplay.prototype.drawCircle = function drawCircle (circleGeometry, feature) {\n    var state = this.state;\n    var fillStyle = state.fillStyle;\n    var strokeStyle = state.strokeStyle;\n    if (fillStyle === undefined && strokeStyle === undefined) {\n      return;\n    }\n    this.setFillStrokeStyles_(circleGeometry);\n    this.beginGeometry(circleGeometry, feature);\n    if (state.fillStyle !== undefined) {\n      this.hitDetectionInstructions.push([\n        CanvasInstruction.SET_FILL_STYLE,\n        asString(defaultFillStyle)\n      ]);\n    }\n    if (state.strokeStyle !== undefined) {\n      this.hitDetectionInstructions.push([\n        CanvasInstruction.SET_STROKE_STYLE,\n        state.strokeStyle, state.lineWidth, state.lineCap, state.lineJoin,\n        state.miterLimit, state.lineDash, state.lineDashOffset\n      ]);\n    }\n    var flatCoordinates = circleGeometry.getFlatCoordinates();\n    var stride = circleGeometry.getStride();\n    var myBegin = this.coordinates.length;\n    this.appendFlatCoordinates(\n      flatCoordinates, 0, flatCoordinates.length, stride, false, false);\n    var circleInstruction = [CanvasInstruction.CIRCLE, myBegin];\n    this.instructions.push(beginPathInstruction, circleInstruction);\n    this.hitDetectionInstructions.push(beginPathInstruction, circleInstruction);\n    this.hitDetectionInstructions.push(fillInstruction);\n    if (state.fillStyle !== undefined) {\n      this.instructions.push(fillInstruction);\n    }\n    if (state.strokeStyle !== undefined) {\n      this.instructions.push(strokeInstruction);\n      this.hitDetectionInstructions.push(strokeInstruction);\n    }\n    this.endGeometry(circleGeometry, feature);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasPolygonReplay.prototype.drawPolygon = function drawPolygon (polygonGeometry, feature) {\n    var state = this.state;\n    var fillStyle = state.fillStyle;\n    var strokeStyle = state.strokeStyle;\n    if (fillStyle === undefined && strokeStyle === undefined) {\n      return;\n    }\n    this.setFillStrokeStyles_(polygonGeometry);\n    this.beginGeometry(polygonGeometry, feature);\n    if (state.fillStyle !== undefined) {\n      this.hitDetectionInstructions.push([\n        CanvasInstruction.SET_FILL_STYLE,\n        asString(defaultFillStyle)\n      ]);\n    }\n    if (state.strokeStyle !== undefined) {\n      this.hitDetectionInstructions.push([\n        CanvasInstruction.SET_STROKE_STYLE,\n        state.strokeStyle, state.lineWidth, state.lineCap, state.lineJoin,\n        state.miterLimit, state.lineDash, state.lineDashOffset\n      ]);\n    }\n    var ends = polygonGeometry.getEnds();\n    var flatCoordinates = polygonGeometry.getOrientedFlatCoordinates();\n    var stride = polygonGeometry.getStride();\n    this.drawFlatCoordinatess_(flatCoordinates, 0, ends, stride);\n    this.endGeometry(polygonGeometry, feature);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasPolygonReplay.prototype.drawMultiPolygon = function drawMultiPolygon (multiPolygonGeometry, feature) {\n    var state = this.state;\n    var fillStyle = state.fillStyle;\n    var strokeStyle = state.strokeStyle;\n    if (fillStyle === undefined && strokeStyle === undefined) {\n      return;\n    }\n    this.setFillStrokeStyles_(multiPolygonGeometry);\n    this.beginGeometry(multiPolygonGeometry, feature);\n    if (state.fillStyle !== undefined) {\n      this.hitDetectionInstructions.push([\n        CanvasInstruction.SET_FILL_STYLE,\n        asString(defaultFillStyle)\n      ]);\n    }\n    if (state.strokeStyle !== undefined) {\n      this.hitDetectionInstructions.push([\n        CanvasInstruction.SET_STROKE_STYLE,\n        state.strokeStyle, state.lineWidth, state.lineCap, state.lineJoin,\n        state.miterLimit, state.lineDash, state.lineDashOffset\n      ]);\n    }\n    var endss = multiPolygonGeometry.getEndss();\n    var flatCoordinates = multiPolygonGeometry.getOrientedFlatCoordinates();\n    var stride = multiPolygonGeometry.getStride();\n    var offset = 0;\n    for (var i = 0, ii = endss.length; i < ii; ++i) {\n      offset = this.drawFlatCoordinatess_(flatCoordinates, offset, endss[i], stride);\n    }\n    this.endGeometry(multiPolygonGeometry, feature);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasPolygonReplay.prototype.finish = function finish () {\n    this.reverseHitDetectionInstructions();\n    this.state = null;\n    // We want to preserve topology when drawing polygons.  Polygons are\n    // simplified using quantization and point elimination. However, we might\n    // have received a mix of quantized and non-quantized geometries, so ensure\n    // that all are quantized by quantizing all coordinates in the batch.\n    var tolerance = this.tolerance;\n    if (tolerance !== 0) {\n      var coordinates = this.coordinates;\n      for (var i = 0, ii = coordinates.length; i < ii; ++i) {\n        coordinates[i] = snap(coordinates[i], tolerance);\n      }\n    }\n  };\n\n  /**\n   * @private\n   * @param {import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default} geometry Geometry.\n   */\n  CanvasPolygonReplay.prototype.setFillStrokeStyles_ = function setFillStrokeStyles_ (geometry) {\n    var state = this.state;\n    var fillStyle = state.fillStyle;\n    if (fillStyle !== undefined) {\n      this.updateFillStyle(state, this.createFill, geometry);\n    }\n    if (state.strokeStyle !== undefined) {\n      this.updateStrokeStyle(state, this.applyStroke);\n    }\n  };\n\n  return CanvasPolygonReplay;\n}(CanvasReplay));\n\n\nexport default CanvasPolygonReplay;\n\n//# sourceMappingURL=PolygonReplay.js.map","/**\n * @module ol/geom/flat/straightchunk\n */\n\n\n/**\n * @param {number} maxAngle Maximum acceptable angle delta between segments.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {Array<number>} Start and end of the first suitable chunk of the\n * given `flatCoordinates`.\n */\nexport function matchingChunk(maxAngle, flatCoordinates, offset, end, stride) {\n  var chunkStart = offset;\n  var chunkEnd = offset;\n  var chunkM = 0;\n  var m = 0;\n  var start = offset;\n  var acos, i, m12, m23, x1, y1, x12, y12, x23, y23;\n  for (i = offset; i < end; i += stride) {\n    var x2 = flatCoordinates[i];\n    var y2 = flatCoordinates[i + 1];\n    if (x1 !== undefined) {\n      x23 = x2 - x1;\n      y23 = y2 - y1;\n      m23 = Math.sqrt(x23 * x23 + y23 * y23);\n      if (x12 !== undefined) {\n        m += m12;\n        acos = Math.acos((x12 * x23 + y12 * y23) / (m12 * m23));\n        if (acos > maxAngle) {\n          if (m > chunkM) {\n            chunkM = m;\n            chunkStart = start;\n            chunkEnd = i;\n          }\n          m = 0;\n          start = i - stride;\n        }\n      }\n      m12 = m23;\n      x12 = x23;\n      y12 = y23;\n    }\n    x1 = x2;\n    y1 = y2;\n  }\n  m += m23;\n  return m > chunkM ? [start, i] : [chunkStart, chunkEnd];\n}\n\n//# sourceMappingURL=straightchunk.js.map","/**\n * @module ol/style/TextPlacement\n */\n\n/**\n * Text placement. One of `'point'`, `'line'`. Default is `'point'`. Note that\n * `'line'` requires the underlying geometry to be a {@link module:ol/geom/LineString~LineString},\n * {@link module:ol/geom/Polygon~Polygon}, {@link module:ol/geom/MultiLineString~MultiLineString} or\n * {@link module:ol/geom/MultiPolygon~MultiPolygon}.\n * @enum {string}\n */\nexport default {\n  POINT: 'point',\n  LINE: 'line'\n};\n\n//# sourceMappingURL=TextPlacement.js.map","/**\n * @module ol/render/canvas/TextReplay\n */\nimport {getUid} from '../../util.js';\nimport {asColorLike} from '../../colorlike.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {intersects} from '../../extent.js';\nimport {matchingChunk} from '../../geom/flat/straightchunk.js';\nimport GeometryType from '../../geom/GeometryType.js';\nimport {CANVAS_LINE_DASH} from '../../has.js';\nimport {labelCache, measureTextWidth, defaultTextAlign, measureTextHeight, defaultPadding, defaultLineCap, defaultLineDashOffset, defaultLineDash, defaultLineJoin, defaultFillStyle, checkFont, defaultFont, defaultLineWidth, defaultMiterLimit, defaultStrokeStyle, defaultTextBaseline} from '../canvas.js';\nimport CanvasInstruction from './Instruction.js';\nimport CanvasReplay from './Replay.js';\nimport {TEXT_ALIGN} from '../replay.js';\nimport TextPlacement from '../../style/TextPlacement.js';\n\nvar CanvasTextReplay = /*@__PURE__*/(function (CanvasReplay) {\n  function CanvasTextReplay(tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree) {\n    CanvasReplay.call(this, tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree);\n\n    /**\n     * @private\n     * @type {import(\"../canvas.js\").DeclutterGroup}\n     */\n    this.declutterGroup_;\n\n    /**\n     * @private\n     * @type {Array<HTMLCanvasElement>}\n     */\n    this.labels_ = null;\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.text_ = '';\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textOffsetX_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textOffsetY_ = 0;\n\n    /**\n     * @private\n     * @type {boolean|undefined}\n     */\n    this.textRotateWithView_ = undefined;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textRotation_ = 0;\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").FillState}\n     */\n    this.textFillState_ = null;\n\n    /**\n     * @type {!Object<string, import(\"../canvas.js\").FillState>}\n     */\n    this.fillStates = {};\n\n    /**\n     * @private\n     * @type {?import(\"../canvas.js\").StrokeState}\n     */\n    this.textStrokeState_ = null;\n\n    /**\n     * @type {!Object<string, import(\"../canvas.js\").StrokeState>}\n     */\n    this.strokeStates = {};\n\n    /**\n     * @private\n     * @type {import(\"../canvas.js\").TextState}\n     */\n    this.textState_ = /** @type {import(\"../canvas.js\").TextState} */ ({});\n\n    /**\n     * @type {!Object<string, import(\"../canvas.js\").TextState>}\n     */\n    this.textStates = {};\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.textKey_ = '';\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.fillKey_ = '';\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.strokeKey_ = '';\n\n    /**\n     * @private\n     * @type {Object<string, Object<string, number>>}\n     */\n    this.widths_ = {};\n\n    labelCache.prune();\n\n  }\n\n  if ( CanvasReplay ) CanvasTextReplay.__proto__ = CanvasReplay;\n  CanvasTextReplay.prototype = Object.create( CanvasReplay && CanvasReplay.prototype );\n  CanvasTextReplay.prototype.constructor = CanvasTextReplay;\n\n  /**\n   * @inheritDoc\n   */\n  CanvasTextReplay.prototype.drawText = function drawText (geometry, feature) {\n    var fillState = this.textFillState_;\n    var strokeState = this.textStrokeState_;\n    var textState = this.textState_;\n    if (this.text_ === '' || !textState || (!fillState && !strokeState)) {\n      return;\n    }\n\n    var begin = this.coordinates.length;\n\n    var geometryType = geometry.getType();\n    var flatCoordinates = null;\n    var end = 2;\n    var stride = 2;\n    var i, ii;\n\n    if (textState.placement === TextPlacement.LINE) {\n      if (!intersects(this.getBufferedMaxExtent(), geometry.getExtent())) {\n        return;\n      }\n      var ends;\n      flatCoordinates = geometry.getFlatCoordinates();\n      stride = geometry.getStride();\n      if (geometryType == GeometryType.LINE_STRING) {\n        ends = [flatCoordinates.length];\n      } else if (geometryType == GeometryType.MULTI_LINE_STRING) {\n        ends = geometry.getEnds();\n      } else if (geometryType == GeometryType.POLYGON) {\n        ends = geometry.getEnds().slice(0, 1);\n      } else if (geometryType == GeometryType.MULTI_POLYGON) {\n        var endss = geometry.getEndss();\n        ends = [];\n        for (i = 0, ii = endss.length; i < ii; ++i) {\n          ends.push(endss[i][0]);\n        }\n      }\n      this.beginGeometry(geometry, feature);\n      var textAlign = textState.textAlign;\n      var flatOffset = 0;\n      var flatEnd;\n      for (var o = 0, oo = ends.length; o < oo; ++o) {\n        if (textAlign == undefined) {\n          var range = matchingChunk(textState.maxAngle, flatCoordinates, flatOffset, ends[o], stride);\n          flatOffset = range[0];\n          flatEnd = range[1];\n        } else {\n          flatEnd = ends[o];\n        }\n        for (i = flatOffset; i < flatEnd; i += stride) {\n          this.coordinates.push(flatCoordinates[i], flatCoordinates[i + 1]);\n        }\n        end = this.coordinates.length;\n        flatOffset = ends[o];\n        this.drawChars_(begin, end, this.declutterGroup_);\n        begin = end;\n      }\n      this.endGeometry(geometry, feature);\n\n    } else {\n      var label = this.getImage(this.text_, this.textKey_, this.fillKey_, this.strokeKey_);\n      var width = label.width / this.pixelRatio;\n      switch (geometryType) {\n        case GeometryType.POINT:\n        case GeometryType.MULTI_POINT:\n          flatCoordinates = geometry.getFlatCoordinates();\n          end = flatCoordinates.length;\n          break;\n        case GeometryType.LINE_STRING:\n          flatCoordinates = /** @type {import(\"../../geom/LineString.js\").default} */ (geometry).getFlatMidpoint();\n          break;\n        case GeometryType.CIRCLE:\n          flatCoordinates = /** @type {import(\"../../geom/Circle.js\").default} */ (geometry).getCenter();\n          break;\n        case GeometryType.MULTI_LINE_STRING:\n          flatCoordinates = /** @type {import(\"../../geom/MultiLineString.js\").default} */ (geometry).getFlatMidpoints();\n          end = flatCoordinates.length;\n          break;\n        case GeometryType.POLYGON:\n          flatCoordinates = /** @type {import(\"../../geom/Polygon.js\").default} */ (geometry).getFlatInteriorPoint();\n          if (!textState.overflow && flatCoordinates[2] / this.resolution < width) {\n            return;\n          }\n          stride = 3;\n          break;\n        case GeometryType.MULTI_POLYGON:\n          var interiorPoints = /** @type {import(\"../../geom/MultiPolygon.js\").default} */ (geometry).getFlatInteriorPoints();\n          flatCoordinates = [];\n          for (i = 0, ii = interiorPoints.length; i < ii; i += 3) {\n            if (textState.overflow || interiorPoints[i + 2] / this.resolution >= width) {\n              flatCoordinates.push(interiorPoints[i], interiorPoints[i + 1]);\n            }\n          }\n          end = flatCoordinates.length;\n          if (end == 0) {\n            return;\n          }\n          break;\n        default:\n      }\n      end = this.appendFlatCoordinates(flatCoordinates, 0, end, stride, false, false);\n      if (textState.backgroundFill || textState.backgroundStroke) {\n        this.setFillStrokeStyle(textState.backgroundFill, textState.backgroundStroke);\n        if (textState.backgroundFill) {\n          this.updateFillStyle(this.state, this.createFill, geometry);\n          this.hitDetectionInstructions.push(this.createFill(this.state, geometry));\n        }\n        if (textState.backgroundStroke) {\n          this.updateStrokeStyle(this.state, this.applyStroke);\n          this.hitDetectionInstructions.push(this.createStroke(this.state));\n        }\n      }\n      this.beginGeometry(geometry, feature);\n      this.drawTextImage_(label, begin, end);\n      this.endGeometry(geometry, feature);\n    }\n  };\n\n  /**\n   * @param {string} text Text.\n   * @param {string} textKey Text style key.\n   * @param {string} fillKey Fill style key.\n   * @param {string} strokeKey Stroke style key.\n   * @return {HTMLCanvasElement} Image.\n   */\n  CanvasTextReplay.prototype.getImage = function getImage (text, textKey, fillKey, strokeKey) {\n    var label;\n    var key = strokeKey + textKey + text + fillKey + this.pixelRatio;\n\n    if (!labelCache.containsKey(key)) {\n      var strokeState = strokeKey ? this.strokeStates[strokeKey] || this.textStrokeState_ : null;\n      var fillState = fillKey ? this.fillStates[fillKey] || this.textFillState_ : null;\n      var textState = this.textStates[textKey] || this.textState_;\n      var pixelRatio = this.pixelRatio;\n      var scale = textState.scale * pixelRatio;\n      var align = TEXT_ALIGN[textState.textAlign || defaultTextAlign];\n      var strokeWidth = strokeKey && strokeState.lineWidth ? strokeState.lineWidth : 0;\n\n      var lines = text.split('\\n');\n      var numLines = lines.length;\n      var widths = [];\n      var width = measureTextWidths(textState.font, lines, widths);\n      var lineHeight = measureTextHeight(textState.font);\n      var height = lineHeight * numLines;\n      var renderWidth = (width + strokeWidth);\n      var context = createCanvasContext2D(\n        Math.ceil(renderWidth * scale),\n        Math.ceil((height + strokeWidth) * scale));\n      label = context.canvas;\n      labelCache.set(key, label);\n      if (scale != 1) {\n        context.scale(scale, scale);\n      }\n      context.font = textState.font;\n      if (strokeKey) {\n        context.strokeStyle = strokeState.strokeStyle;\n        context.lineWidth = strokeWidth;\n        context.lineCap = /** @type {CanvasLineCap} */ (strokeState.lineCap);\n        context.lineJoin = /** @type {CanvasLineJoin} */ (strokeState.lineJoin);\n        context.miterLimit = strokeState.miterLimit;\n        if (CANVAS_LINE_DASH && strokeState.lineDash.length) {\n          context.setLineDash(strokeState.lineDash);\n          context.lineDashOffset = strokeState.lineDashOffset;\n        }\n      }\n      if (fillKey) {\n        context.fillStyle = fillState.fillStyle;\n      }\n      context.textBaseline = 'middle';\n      context.textAlign = 'center';\n      var leftRight = (0.5 - align);\n      var x = align * label.width / scale + leftRight * strokeWidth;\n      var i;\n      if (strokeKey) {\n        for (i = 0; i < numLines; ++i) {\n          context.strokeText(lines[i], x + leftRight * widths[i], 0.5 * (strokeWidth + lineHeight) + i * lineHeight);\n        }\n      }\n      if (fillKey) {\n        for (i = 0; i < numLines; ++i) {\n          context.fillText(lines[i], x + leftRight * widths[i], 0.5 * (strokeWidth + lineHeight) + i * lineHeight);\n        }\n      }\n    }\n    return labelCache.get(key);\n  };\n\n  /**\n   * @private\n   * @param {HTMLCanvasElement} label Label.\n   * @param {number} begin Begin.\n   * @param {number} end End.\n   */\n  CanvasTextReplay.prototype.drawTextImage_ = function drawTextImage_ (label, begin, end) {\n    var textState = this.textState_;\n    var strokeState = this.textStrokeState_;\n    var pixelRatio = this.pixelRatio;\n    var align = TEXT_ALIGN[textState.textAlign || defaultTextAlign];\n    var baseline = TEXT_ALIGN[textState.textBaseline];\n    var strokeWidth = strokeState && strokeState.lineWidth ? strokeState.lineWidth : 0;\n\n    var anchorX = align * label.width / pixelRatio + 2 * (0.5 - align) * strokeWidth;\n    var anchorY = baseline * label.height / pixelRatio + 2 * (0.5 - baseline) * strokeWidth;\n    this.instructions.push([CanvasInstruction.DRAW_IMAGE, begin, end,\n      label, (anchorX - this.textOffsetX_) * pixelRatio, (anchorY - this.textOffsetY_) * pixelRatio,\n      this.declutterGroup_, label.height, 1, 0, 0, this.textRotateWithView_, this.textRotation_,\n      1, label.width,\n      textState.padding == defaultPadding ?\n        defaultPadding : textState.padding.map(function(p) {\n          return p * pixelRatio;\n        }),\n      !!textState.backgroundFill, !!textState.backgroundStroke\n    ]);\n    this.hitDetectionInstructions.push([CanvasInstruction.DRAW_IMAGE, begin, end,\n      label, (anchorX - this.textOffsetX_) * pixelRatio, (anchorY - this.textOffsetY_) * pixelRatio,\n      this.declutterGroup_, label.height, 1, 0, 0, this.textRotateWithView_, this.textRotation_,\n      1 / pixelRatio, label.width, textState.padding,\n      !!textState.backgroundFill, !!textState.backgroundStroke\n    ]);\n  };\n\n  /**\n   * @private\n   * @param {number} begin Begin.\n   * @param {number} end End.\n   * @param {import(\"../canvas.js\").DeclutterGroup} declutterGroup Declutter group.\n   */\n  CanvasTextReplay.prototype.drawChars_ = function drawChars_ (begin, end, declutterGroup) {\n    var strokeState = this.textStrokeState_;\n    var textState = this.textState_;\n    var fillState = this.textFillState_;\n\n    var strokeKey = this.strokeKey_;\n    if (strokeState) {\n      if (!(strokeKey in this.strokeStates)) {\n        this.strokeStates[strokeKey] = /** @type {import(\"../canvas.js\").StrokeState} */ ({\n          strokeStyle: strokeState.strokeStyle,\n          lineCap: strokeState.lineCap,\n          lineDashOffset: strokeState.lineDashOffset,\n          lineWidth: strokeState.lineWidth,\n          lineJoin: strokeState.lineJoin,\n          miterLimit: strokeState.miterLimit,\n          lineDash: strokeState.lineDash\n        });\n      }\n    }\n    var textKey = this.textKey_;\n    if (!(this.textKey_ in this.textStates)) {\n      this.textStates[this.textKey_] = /** @type {import(\"../canvas.js\").TextState} */ ({\n        font: textState.font,\n        textAlign: textState.textAlign || defaultTextAlign,\n        scale: textState.scale\n      });\n    }\n    var fillKey = this.fillKey_;\n    if (fillState) {\n      if (!(fillKey in this.fillStates)) {\n        this.fillStates[fillKey] = /** @type {import(\"../canvas.js\").FillState} */ ({\n          fillStyle: fillState.fillStyle\n        });\n      }\n    }\n\n    var pixelRatio = this.pixelRatio;\n    var baseline = TEXT_ALIGN[textState.textBaseline];\n\n    var offsetY = this.textOffsetY_ * pixelRatio;\n    var text = this.text_;\n    var font = textState.font;\n    var textScale = textState.scale;\n    var strokeWidth = strokeState ? strokeState.lineWidth * textScale / 2 : 0;\n    var widths = this.widths_[font];\n    if (!widths) {\n      this.widths_[font] = widths = {};\n    }\n    this.instructions.push([CanvasInstruction.DRAW_CHARS,\n      begin, end, baseline, declutterGroup,\n      textState.overflow, fillKey, textState.maxAngle,\n      function(text) {\n        var width = widths[text];\n        if (!width) {\n          width = widths[text] = measureTextWidth(font, text);\n        }\n        return width * textScale * pixelRatio;\n      },\n      offsetY, strokeKey, strokeWidth * pixelRatio, text, textKey, 1\n    ]);\n    this.hitDetectionInstructions.push([CanvasInstruction.DRAW_CHARS,\n      begin, end, baseline, declutterGroup,\n      textState.overflow, fillKey, textState.maxAngle,\n      function(text) {\n        var width = widths[text];\n        if (!width) {\n          width = widths[text] = measureTextWidth(font, text);\n        }\n        return width * textScale;\n      },\n      offsetY, strokeKey, strokeWidth, text, textKey, 1 / pixelRatio\n    ]);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasTextReplay.prototype.setTextStyle = function setTextStyle (textStyle, declutterGroup) {\n    var textState, fillState, strokeState;\n    if (!textStyle) {\n      this.text_ = '';\n    } else {\n      this.declutterGroup_ = /** @type {import(\"../canvas.js\").DeclutterGroup} */ (declutterGroup);\n\n      var textFillStyle = textStyle.getFill();\n      if (!textFillStyle) {\n        fillState = this.textFillState_ = null;\n      } else {\n        fillState = this.textFillState_;\n        if (!fillState) {\n          fillState = this.textFillState_ = /** @type {import(\"../canvas.js\").FillState} */ ({});\n        }\n        fillState.fillStyle = asColorLike(\n          textFillStyle.getColor() || defaultFillStyle);\n      }\n\n      var textStrokeStyle = textStyle.getStroke();\n      if (!textStrokeStyle) {\n        strokeState = this.textStrokeState_ = null;\n      } else {\n        strokeState = this.textStrokeState_;\n        if (!strokeState) {\n          strokeState = this.textStrokeState_ = /** @type {import(\"../canvas.js\").StrokeState} */ ({});\n        }\n        var lineDash = textStrokeStyle.getLineDash();\n        var lineDashOffset = textStrokeStyle.getLineDashOffset();\n        var lineWidth = textStrokeStyle.getWidth();\n        var miterLimit = textStrokeStyle.getMiterLimit();\n        strokeState.lineCap = textStrokeStyle.getLineCap() || defaultLineCap;\n        strokeState.lineDash = lineDash ? lineDash.slice() : defaultLineDash;\n        strokeState.lineDashOffset =\n            lineDashOffset === undefined ? defaultLineDashOffset : lineDashOffset;\n        strokeState.lineJoin = textStrokeStyle.getLineJoin() || defaultLineJoin;\n        strokeState.lineWidth =\n            lineWidth === undefined ? defaultLineWidth : lineWidth;\n        strokeState.miterLimit =\n            miterLimit === undefined ? defaultMiterLimit : miterLimit;\n        strokeState.strokeStyle = asColorLike(\n          textStrokeStyle.getColor() || defaultStrokeStyle);\n      }\n\n      textState = this.textState_;\n      var font = textStyle.getFont() || defaultFont;\n      checkFont(font);\n      var textScale = textStyle.getScale();\n      textState.overflow = textStyle.getOverflow();\n      textState.font = font;\n      textState.maxAngle = textStyle.getMaxAngle();\n      textState.placement = textStyle.getPlacement();\n      textState.textAlign = textStyle.getTextAlign();\n      textState.textBaseline = textStyle.getTextBaseline() || defaultTextBaseline;\n      textState.backgroundFill = textStyle.getBackgroundFill();\n      textState.backgroundStroke = textStyle.getBackgroundStroke();\n      textState.padding = textStyle.getPadding() || defaultPadding;\n      textState.scale = textScale === undefined ? 1 : textScale;\n\n      var textOffsetX = textStyle.getOffsetX();\n      var textOffsetY = textStyle.getOffsetY();\n      var textRotateWithView = textStyle.getRotateWithView();\n      var textRotation = textStyle.getRotation();\n      this.text_ = textStyle.getText() || '';\n      this.textOffsetX_ = textOffsetX === undefined ? 0 : textOffsetX;\n      this.textOffsetY_ = textOffsetY === undefined ? 0 : textOffsetY;\n      this.textRotateWithView_ = textRotateWithView === undefined ? false : textRotateWithView;\n      this.textRotation_ = textRotation === undefined ? 0 : textRotation;\n\n      this.strokeKey_ = strokeState ?\n        (typeof strokeState.strokeStyle == 'string' ? strokeState.strokeStyle : getUid(strokeState.strokeStyle)) +\n        strokeState.lineCap + strokeState.lineDashOffset + '|' + strokeState.lineWidth +\n        strokeState.lineJoin + strokeState.miterLimit + '[' + strokeState.lineDash.join() + ']' :\n        '';\n      this.textKey_ = textState.font + textState.scale + (textState.textAlign || '?');\n      this.fillKey_ = fillState ?\n        (typeof fillState.fillStyle == 'string' ? fillState.fillStyle : ('|' + getUid(fillState.fillStyle))) :\n        '';\n    }\n  };\n\n  return CanvasTextReplay;\n}(CanvasReplay));\n\n\n/**\n * @param {string} font Font to use for measuring.\n * @param {Array<string>} lines Lines to measure.\n * @param {Array<number>} widths Array will be populated with the widths of\n * each line.\n * @return {number} Width of the whole text.\n */\nexport function measureTextWidths(font, lines, widths) {\n  var numLines = lines.length;\n  var width = 0;\n  for (var i = 0; i < numLines; ++i) {\n    var currentWidth = measureTextWidth(font, lines[i]);\n    width = Math.max(width, currentWidth);\n    widths.push(currentWidth);\n  }\n  return width;\n}\n\n\nexport default CanvasTextReplay;\n\n//# sourceMappingURL=TextReplay.js.map","/**\n * @module ol/render/canvas/ReplayGroup\n */\n\nimport {numberSafeCompareFunction} from '../../array.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {buffer, createEmpty, extendCoordinate} from '../../extent.js';\nimport {transform2D} from '../../geom/flat/transform.js';\nimport {isEmpty} from '../../obj.js';\nimport ReplayGroup from '../ReplayGroup.js';\nimport ReplayType from '../ReplayType.js';\nimport CanvasReplay from './Replay.js';\nimport CanvasImageReplay from './ImageReplay.js';\nimport CanvasLineStringReplay from './LineStringReplay.js';\nimport CanvasPolygonReplay from './PolygonReplay.js';\nimport CanvasTextReplay from './TextReplay.js';\nimport {ORDER} from '../replay.js';\nimport {create as createTransform, compose as composeTransform} from '../../transform.js';\n\n\n/**\n * @type {Object<ReplayType, typeof CanvasReplay>}\n */\nvar BATCH_CONSTRUCTORS = {\n  'Circle': CanvasPolygonReplay,\n  'Default': CanvasReplay,\n  'Image': CanvasImageReplay,\n  'LineString': CanvasLineStringReplay,\n  'Polygon': CanvasPolygonReplay,\n  'Text': CanvasTextReplay\n};\n\n\nvar CanvasReplayGroup = /*@__PURE__*/(function (ReplayGroup) {\n  function CanvasReplayGroup(\n    tolerance,\n    maxExtent,\n    resolution,\n    pixelRatio,\n    overlaps,\n    declutterTree,\n    opt_renderBuffer\n  ) {\n    ReplayGroup.call(this);\n\n    /**\n     * Declutter tree.\n     * @private\n     */\n    this.declutterTree_ = declutterTree;\n\n    /**\n     * @type {import(\"../canvas.js\").DeclutterGroup}\n     * @private\n     */\n    this.declutterGroup_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.tolerance_ = tolerance;\n\n    /**\n     * @private\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.maxExtent_ = maxExtent;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.overlaps_ = overlaps;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.pixelRatio_ = pixelRatio;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.resolution_ = resolution;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.renderBuffer_ = opt_renderBuffer;\n\n    /**\n     * @private\n     * @type {!Object<string, !Object<ReplayType, CanvasReplay>>}\n     */\n    this.replaysByZIndex_ = {};\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.hitDetectionContext_ = createCanvasContext2D(1, 1);\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.hitDetectionTransform_ = createTransform();\n  }\n\n  if ( ReplayGroup ) CanvasReplayGroup.__proto__ = ReplayGroup;\n  CanvasReplayGroup.prototype = Object.create( ReplayGroup && ReplayGroup.prototype );\n  CanvasReplayGroup.prototype.constructor = CanvasReplayGroup;\n\n  /**\n   * @inheritDoc\n   */\n  CanvasReplayGroup.prototype.addDeclutter = function addDeclutter (group) {\n    var declutter = null;\n    if (this.declutterTree_) {\n      if (group) {\n        declutter = this.declutterGroup_;\n        /** @type {number} */ (declutter[4])++;\n      } else {\n        declutter = this.declutterGroup_ = createEmpty();\n        declutter.push(1);\n      }\n    }\n    return declutter;\n  };\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../transform.js\").Transform} transform Transform.\n   */\n  CanvasReplayGroup.prototype.clip = function clip (context, transform) {\n    var flatClipCoords = this.getClipCoords(transform);\n    context.beginPath();\n    context.moveTo(flatClipCoords[0], flatClipCoords[1]);\n    context.lineTo(flatClipCoords[2], flatClipCoords[3]);\n    context.lineTo(flatClipCoords[4], flatClipCoords[5]);\n    context.lineTo(flatClipCoords[6], flatClipCoords[7]);\n    context.clip();\n  };\n\n  /**\n   * @param {Array<ReplayType>} replays Replays.\n   * @return {boolean} Has replays of the provided types.\n   */\n  CanvasReplayGroup.prototype.hasReplays = function hasReplays (replays) {\n    for (var zIndex in this.replaysByZIndex_) {\n      var candidates = this.replaysByZIndex_[zIndex];\n      for (var i = 0, ii = replays.length; i < ii; ++i) {\n        if (replays[i] in candidates) {\n          return true;\n        }\n      }\n    }\n    return false;\n  };\n\n  /**\n   * FIXME empty description for jsdoc\n   */\n  CanvasReplayGroup.prototype.finish = function finish () {\n    for (var zKey in this.replaysByZIndex_) {\n      var replays = this.replaysByZIndex_[zKey];\n      for (var replayKey in replays) {\n        replays[replayKey].finish();\n      }\n    }\n  };\n\n  /**\n   * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {number} resolution Resolution.\n   * @param {number} rotation Rotation.\n   * @param {number} hitTolerance Hit tolerance in pixels.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   * @param {function((import(\"../../Feature.js\").default|import(\"../Feature.js\").default)): T} callback Feature callback.\n   * @param {Object<string, import(\"../canvas.js\").DeclutterGroup>} declutterReplays Declutter replays.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  CanvasReplayGroup.prototype.forEachFeatureAtCoordinate = function forEachFeatureAtCoordinate (\n    coordinate,\n    resolution,\n    rotation,\n    hitTolerance,\n    skippedFeaturesHash,\n    callback,\n    declutterReplays\n  ) {\n\n    hitTolerance = Math.round(hitTolerance);\n    var contextSize = hitTolerance * 2 + 1;\n    var transform = composeTransform(this.hitDetectionTransform_,\n      hitTolerance + 0.5, hitTolerance + 0.5,\n      1 / resolution, -1 / resolution,\n      -rotation,\n      -coordinate[0], -coordinate[1]);\n    var context = this.hitDetectionContext_;\n\n    if (context.canvas.width !== contextSize || context.canvas.height !== contextSize) {\n      context.canvas.width = contextSize;\n      context.canvas.height = contextSize;\n    } else {\n      context.clearRect(0, 0, contextSize, contextSize);\n    }\n\n    /**\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    var hitExtent;\n    if (this.renderBuffer_ !== undefined) {\n      hitExtent = createEmpty();\n      extendCoordinate(hitExtent, coordinate);\n      buffer(hitExtent, resolution * (this.renderBuffer_ + hitTolerance), hitExtent);\n    }\n\n    var mask = getCircleArray(hitTolerance);\n    var declutteredFeatures;\n    if (this.declutterTree_) {\n      declutteredFeatures = this.declutterTree_.all().map(function(entry) {\n        return entry.value;\n      });\n    }\n\n    var replayType;\n\n    /**\n     * @param {import(\"../../Feature.js\").default|import(\"../Feature.js\").default} feature Feature.\n     * @return {?} Callback result.\n     */\n    function featureCallback(feature) {\n      var imageData = context.getImageData(0, 0, contextSize, contextSize).data;\n      for (var i = 0; i < contextSize; i++) {\n        for (var j = 0; j < contextSize; j++) {\n          if (mask[i][j]) {\n            if (imageData[(j * contextSize + i) * 4 + 3] > 0) {\n              var result = (void 0);\n              if (!(declutteredFeatures && (replayType == ReplayType.IMAGE || replayType == ReplayType.TEXT)) ||\n                  declutteredFeatures.indexOf(feature) !== -1) {\n                result = callback(feature);\n              }\n              if (result) {\n                return result;\n              } else {\n                context.clearRect(0, 0, contextSize, contextSize);\n                return undefined;\n              }\n            }\n          }\n        }\n      }\n    }\n\n    /** @type {Array<number>} */\n    var zs = Object.keys(this.replaysByZIndex_).map(Number);\n    zs.sort(numberSafeCompareFunction);\n\n    var i, j, replays, replay, result;\n    for (i = zs.length - 1; i >= 0; --i) {\n      var zIndexKey = zs[i].toString();\n      replays = this.replaysByZIndex_[zIndexKey];\n      for (j = ORDER.length - 1; j >= 0; --j) {\n        replayType = ORDER[j];\n        replay = replays[replayType];\n        if (replay !== undefined) {\n          if (declutterReplays &&\n              (replayType == ReplayType.IMAGE || replayType == ReplayType.TEXT)) {\n            var declutter = declutterReplays[zIndexKey];\n            if (!declutter) {\n              declutterReplays[zIndexKey] = [replay, transform.slice(0)];\n            } else {\n              declutter.push(replay, transform.slice(0));\n            }\n          } else {\n            result = replay.replayHitDetection(context, transform, rotation,\n              skippedFeaturesHash, featureCallback, hitExtent);\n            if (result) {\n              return result;\n            }\n          }\n        }\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * @param {import(\"../../transform.js\").Transform} transform Transform.\n   * @return {Array<number>} Clip coordinates.\n   */\n  CanvasReplayGroup.prototype.getClipCoords = function getClipCoords (transform) {\n    var maxExtent = this.maxExtent_;\n    var minX = maxExtent[0];\n    var minY = maxExtent[1];\n    var maxX = maxExtent[2];\n    var maxY = maxExtent[3];\n    var flatClipCoords = [minX, minY, minX, maxY, maxX, maxY, maxX, minY];\n    transform2D(\n      flatClipCoords, 0, 8, 2, transform, flatClipCoords);\n    return flatClipCoords;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasReplayGroup.prototype.getReplay = function getReplay (zIndex, replayType) {\n    var zIndexKey = zIndex !== undefined ? zIndex.toString() : '0';\n    var replays = this.replaysByZIndex_[zIndexKey];\n    if (replays === undefined) {\n      replays = {};\n      this.replaysByZIndex_[zIndexKey] = replays;\n    }\n    var replay = replays[replayType];\n    if (replay === undefined) {\n      var Constructor = BATCH_CONSTRUCTORS[replayType];\n      replay = new Constructor(this.tolerance_, this.maxExtent_,\n        this.resolution_, this.pixelRatio_, this.overlaps_, this.declutterTree_);\n      replays[replayType] = replay;\n    }\n    return replay;\n  };\n\n  /**\n   * @return {Object<string, Object<ReplayType, CanvasReplay>>} Replays.\n   */\n  CanvasReplayGroup.prototype.getReplays = function getReplays () {\n    return this.replaysByZIndex_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasReplayGroup.prototype.isEmpty = function isEmpty$1 () {\n    return isEmpty(this.replaysByZIndex_);\n  };\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../transform.js\").Transform} transform Transform.\n   * @param {number} viewRotation View rotation.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   * @param {boolean} snapToPixel Snap point symbols and test to integer pixel.\n   * @param {Array<ReplayType>=} opt_replayTypes Ordered replay types to replay.\n   *     Default is {@link module:ol/render/replay~ORDER}\n   * @param {Object<string, import(\"../canvas.js\").DeclutterGroup>=} opt_declutterReplays Declutter replays.\n   */\n  CanvasReplayGroup.prototype.replay = function replay (\n    context,\n    transform,\n    viewRotation,\n    skippedFeaturesHash,\n    snapToPixel,\n    opt_replayTypes,\n    opt_declutterReplays\n  ) {\n\n    /** @type {Array<number>} */\n    var zs = Object.keys(this.replaysByZIndex_).map(Number);\n    zs.sort(numberSafeCompareFunction);\n\n    // setup clipping so that the parts of over-simplified geometries are not\n    // visible outside the current extent when panning\n    context.save();\n    this.clip(context, transform);\n\n    var replayTypes = opt_replayTypes ? opt_replayTypes : ORDER;\n    var i, ii, j, jj, replays, replay;\n    for (i = 0, ii = zs.length; i < ii; ++i) {\n      var zIndexKey = zs[i].toString();\n      replays = this.replaysByZIndex_[zIndexKey];\n      for (j = 0, jj = replayTypes.length; j < jj; ++j) {\n        var replayType = replayTypes[j];\n        replay = replays[replayType];\n        if (replay !== undefined) {\n          if (opt_declutterReplays &&\n              (replayType == ReplayType.IMAGE || replayType == ReplayType.TEXT)) {\n            var declutter = opt_declutterReplays[zIndexKey];\n            if (!declutter) {\n              opt_declutterReplays[zIndexKey] = [replay, transform.slice(0)];\n            } else {\n              declutter.push(replay, transform.slice(0));\n            }\n          } else {\n            replay.replay(context, transform, viewRotation, skippedFeaturesHash, snapToPixel);\n          }\n        }\n      }\n    }\n\n    context.restore();\n  };\n\n  return CanvasReplayGroup;\n}(ReplayGroup));\n\n\n/**\n * This cache is used for storing calculated pixel circles for increasing performance.\n * It is a static property to allow each Replaygroup to access it.\n * @type {Object<number, Array<Array<(boolean|undefined)>>>}\n */\nvar circleArrayCache = {\n  0: [[true]]\n};\n\n\n/**\n * This method fills a row in the array from the given coordinate to the\n * middle with `true`.\n * @param {Array<Array<(boolean|undefined)>>} array The array that will be altered.\n * @param {number} x X coordinate.\n * @param {number} y Y coordinate.\n */\nfunction fillCircleArrayRowToMiddle(array, x, y) {\n  var i;\n  var radius = Math.floor(array.length / 2);\n  if (x >= radius) {\n    for (i = radius; i < x; i++) {\n      array[i][y] = true;\n    }\n  } else if (x < radius) {\n    for (i = x + 1; i < radius; i++) {\n      array[i][y] = true;\n    }\n  }\n}\n\n\n/**\n * This methods creates a circle inside a fitting array. Points inside the\n * circle are marked by true, points on the outside are undefined.\n * It uses the midpoint circle algorithm.\n * A cache is used to increase performance.\n * @param {number} radius Radius.\n * @returns {Array<Array<(boolean|undefined)>>} An array with marked circle points.\n */\nexport function getCircleArray(radius) {\n  if (circleArrayCache[radius] !== undefined) {\n    return circleArrayCache[radius];\n  }\n\n  var arraySize = radius * 2 + 1;\n  var arr = new Array(arraySize);\n  for (var i = 0; i < arraySize; i++) {\n    arr[i] = new Array(arraySize);\n  }\n\n  var x = radius;\n  var y = 0;\n  var error = 0;\n\n  while (x >= y) {\n    fillCircleArrayRowToMiddle(arr, radius + x, radius + y);\n    fillCircleArrayRowToMiddle(arr, radius + y, radius + x);\n    fillCircleArrayRowToMiddle(arr, radius - y, radius + x);\n    fillCircleArrayRowToMiddle(arr, radius - x, radius + y);\n    fillCircleArrayRowToMiddle(arr, radius - x, radius - y);\n    fillCircleArrayRowToMiddle(arr, radius - y, radius - x);\n    fillCircleArrayRowToMiddle(arr, radius + y, radius - x);\n    fillCircleArrayRowToMiddle(arr, radius + x, radius - y);\n\n    y++;\n    error += 1 + 2 * y;\n    if (2 * (error - x) + 1 > 0) {\n      x -= 1;\n      error += 1 - 2 * x;\n    }\n  }\n\n  circleArrayCache[radius] = arr;\n  return arr;\n}\n\n\n/**\n * @param {!Object<string, Array<*>>} declutterReplays Declutter replays.\n * @param {CanvasRenderingContext2D} context Context.\n * @param {number} rotation Rotation.\n * @param {boolean} snapToPixel Snap point symbols and text to integer pixels.\n */\nexport function replayDeclutter(declutterReplays, context, rotation, snapToPixel) {\n  var zs = Object.keys(declutterReplays).map(Number).sort(numberSafeCompareFunction);\n  var skippedFeatureUids = {};\n  for (var z = 0, zz = zs.length; z < zz; ++z) {\n    var replayData = declutterReplays[zs[z].toString()];\n    for (var i = 0, ii = replayData.length; i < ii;) {\n      var replay = replayData[i++];\n      var transform = replayData[i++];\n      replay.replay(context, transform, rotation, skippedFeatureUids, snapToPixel);\n    }\n  }\n}\n\n\nexport default CanvasReplayGroup;\n\n//# sourceMappingURL=ReplayGroup.js.map","/**\n * @module ol/renderer/vector\n */\nimport {getUid} from '../util.js';\nimport ImageState from '../ImageState.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport ReplayType from '../render/ReplayType.js';\n\n\n/**\n * Tolerance for geometry simplification in device pixels.\n * @type {number}\n */\nvar SIMPLIFY_TOLERANCE = 0.5;\n\n\n/**\n * @const\n * @type {Object<import(\"../geom/GeometryType.js\").default,\n *                function(import(\"../render/ReplayGroup.js\").default, import(\"../geom/Geometry.js\").default,\n *                         import(\"../style/Style.js\").default, Object)>}\n */\nvar GEOMETRY_RENDERERS = {\n  'Point': renderPointGeometry,\n  'LineString': renderLineStringGeometry,\n  'Polygon': renderPolygonGeometry,\n  'MultiPoint': renderMultiPointGeometry,\n  'MultiLineString': renderMultiLineStringGeometry,\n  'MultiPolygon': renderMultiPolygonGeometry,\n  'GeometryCollection': renderGeometryCollectionGeometry,\n  'Circle': renderCircleGeometry\n};\n\n\n/**\n * @param {import(\"../Feature.js\").FeatureLike} feature1 Feature 1.\n * @param {import(\"../Feature.js\").FeatureLike} feature2 Feature 2.\n * @return {number} Order.\n */\nexport function defaultOrder(feature1, feature2) {\n  return parseInt(getUid(feature1), 10) - parseInt(getUid(feature2), 10);\n}\n\n\n/**\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Squared pixel tolerance.\n */\nexport function getSquaredTolerance(resolution, pixelRatio) {\n  var tolerance = getTolerance(resolution, pixelRatio);\n  return tolerance * tolerance;\n}\n\n\n/**\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Pixel tolerance.\n */\nexport function getTolerance(resolution, pixelRatio) {\n  return SIMPLIFY_TOLERANCE * resolution / pixelRatio;\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/Circle.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").default} feature Feature.\n */\nfunction renderCircleGeometry(replayGroup, geometry, style, feature) {\n  var fillStyle = style.getFill();\n  var strokeStyle = style.getStroke();\n  if (fillStyle || strokeStyle) {\n    var circleReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.CIRCLE);\n    circleReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n    circleReplay.drawCircle(geometry, feature);\n  }\n  var textStyle = style.getText();\n  if (textStyle) {\n    var textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n    textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(false));\n    textReplay.drawText(geometry, feature);\n  }\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {function(this: T, import(\"../events/Event.js\").default)} listener Listener function.\n * @param {T} thisArg Value to use as `this` when executing `listener`.\n * @return {boolean} `true` if style is loading.\n * @template T\n */\nexport function renderFeature(replayGroup, feature, style, squaredTolerance, listener, thisArg) {\n  var loading = false;\n  var imageStyle = style.getImage();\n  if (imageStyle) {\n    var imageState = imageStyle.getImageState();\n    if (imageState == ImageState.LOADED || imageState == ImageState.ERROR) {\n      imageStyle.unlistenImageChange(listener, thisArg);\n    } else {\n      if (imageState == ImageState.IDLE) {\n        imageStyle.load();\n      }\n      imageState = imageStyle.getImageState();\n      imageStyle.listenImageChange(listener, thisArg);\n      loading = true;\n    }\n  }\n  renderFeatureInternal(replayGroup, feature, style, squaredTolerance);\n\n  return loading;\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {number} squaredTolerance Squared tolerance.\n */\nfunction renderFeatureInternal(replayGroup, feature, style, squaredTolerance) {\n  var geometry = style.getGeometryFunction()(feature);\n  if (!geometry) {\n    return;\n  }\n  var simplifiedGeometry = geometry.getSimplifiedGeometry(squaredTolerance);\n  var renderer = style.getRenderer();\n  if (renderer) {\n    renderGeometry(replayGroup, simplifiedGeometry, style, feature);\n  } else {\n    var geometryRenderer = GEOMETRY_RENDERERS[simplifiedGeometry.getType()];\n    geometryRenderer(replayGroup, simplifiedGeometry, style, feature);\n  }\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/Geometry.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\nfunction renderGeometry(replayGroup, geometry, style, feature) {\n  if (geometry.getType() == GeometryType.GEOMETRY_COLLECTION) {\n    var geometries = /** @type {import(\"../geom/GeometryCollection.js\").default} */ (geometry).getGeometries();\n    for (var i = 0, ii = geometries.length; i < ii; ++i) {\n      renderGeometry(replayGroup, geometries[i], style, feature);\n    }\n    return;\n  }\n  var replay = replayGroup.getReplay(style.getZIndex(), ReplayType.DEFAULT);\n  replay.drawCustom(/** @type {import(\"../geom/SimpleGeometry.js\").default} */ (geometry), feature, style.getRenderer());\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/GeometryCollection.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").default} feature Feature.\n */\nfunction renderGeometryCollectionGeometry(replayGroup, geometry, style, feature) {\n  var geometries = geometry.getGeometriesArray();\n  var i, ii;\n  for (i = 0, ii = geometries.length; i < ii; ++i) {\n    var geometryRenderer =\n        GEOMETRY_RENDERERS[geometries[i].getType()];\n    geometryRenderer(replayGroup, geometries[i], style, feature);\n  }\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/LineString.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\nfunction renderLineStringGeometry(replayGroup, geometry, style, feature) {\n  var strokeStyle = style.getStroke();\n  if (strokeStyle) {\n    var lineStringReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.LINE_STRING);\n    lineStringReplay.setFillStrokeStyle(null, strokeStyle);\n    lineStringReplay.drawLineString(geometry, feature);\n  }\n  var textStyle = style.getText();\n  if (textStyle) {\n    var textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n    textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(false));\n    textReplay.drawText(geometry, feature);\n  }\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/MultiLineString.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\nfunction renderMultiLineStringGeometry(replayGroup, geometry, style, feature) {\n  var strokeStyle = style.getStroke();\n  if (strokeStyle) {\n    var lineStringReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.LINE_STRING);\n    lineStringReplay.setFillStrokeStyle(null, strokeStyle);\n    lineStringReplay.drawMultiLineString(geometry, feature);\n  }\n  var textStyle = style.getText();\n  if (textStyle) {\n    var textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n    textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(false));\n    textReplay.drawText(geometry, feature);\n  }\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/MultiPolygon.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").default} feature Feature.\n */\nfunction renderMultiPolygonGeometry(replayGroup, geometry, style, feature) {\n  var fillStyle = style.getFill();\n  var strokeStyle = style.getStroke();\n  if (strokeStyle || fillStyle) {\n    var polygonReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.POLYGON);\n    polygonReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n    polygonReplay.drawMultiPolygon(geometry, feature);\n  }\n  var textStyle = style.getText();\n  if (textStyle) {\n    var textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n    textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(false));\n    textReplay.drawText(geometry, feature);\n  }\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/Point.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\nfunction renderPointGeometry(replayGroup, geometry, style, feature) {\n  var imageStyle = style.getImage();\n  if (imageStyle) {\n    if (imageStyle.getImageState() != ImageState.LOADED) {\n      return;\n    }\n    var imageReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.IMAGE);\n    imageReplay.setImageStyle(imageStyle, replayGroup.addDeclutter(false));\n    imageReplay.drawPoint(geometry, feature);\n  }\n  var textStyle = style.getText();\n  if (textStyle) {\n    var textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n    textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(!!imageStyle));\n    textReplay.drawText(geometry, feature);\n  }\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/MultiPoint.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\nfunction renderMultiPointGeometry(replayGroup, geometry, style, feature) {\n  var imageStyle = style.getImage();\n  if (imageStyle) {\n    if (imageStyle.getImageState() != ImageState.LOADED) {\n      return;\n    }\n    var imageReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.IMAGE);\n    imageReplay.setImageStyle(imageStyle, replayGroup.addDeclutter(false));\n    imageReplay.drawMultiPoint(geometry, feature);\n  }\n  var textStyle = style.getText();\n  if (textStyle) {\n    var textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n    textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(!!imageStyle));\n    textReplay.drawText(geometry, feature);\n  }\n}\n\n\n/**\n * @param {import(\"../render/ReplayGroup.js\").default} replayGroup Replay group.\n * @param {import(\"../geom/Polygon.js\").default|import(\"../render/Feature.js\").default} geometry Geometry.\n * @param {import(\"../style/Style.js\").default} style Style.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n */\nfunction renderPolygonGeometry(replayGroup, geometry, style, feature) {\n  var fillStyle = style.getFill();\n  var strokeStyle = style.getStroke();\n  if (fillStyle || strokeStyle) {\n    var polygonReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.POLYGON);\n    polygonReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n    polygonReplay.drawPolygon(geometry, feature);\n  }\n  var textStyle = style.getText();\n  if (textStyle) {\n    var textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n    textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(false));\n    textReplay.drawText(geometry, feature);\n  }\n}\n\n//# sourceMappingURL=vector.js.map","/**\n * @module ol/renderer/canvas/VectorLayer\n */\nimport {getUid} from '../../util.js';\nimport LayerType from '../../LayerType.js';\nimport ViewHint from '../../ViewHint.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {listen, unlisten} from '../../events.js';\nimport EventType from '../../events/EventType.js';\nimport rbush from 'rbush';\nimport {buffer, createEmpty, containsExtent, getWidth} from '../../extent.js';\nimport RenderEventType from '../../render/EventType.js';\nimport {labelCache, rotateAtOffset} from '../../render/canvas.js';\nimport CanvasReplayGroup from '../../render/canvas/ReplayGroup.js';\nimport CanvasLayerRenderer from './Layer.js';\nimport {defaultOrder as defaultRenderOrder, getTolerance as getRenderTolerance, getSquaredTolerance as getSquaredRenderTolerance, renderFeature} from '../vector.js';\n\n/**\n * @classdesc\n * Canvas renderer for vector layers.\n * @api\n */\nvar CanvasVectorLayerRenderer = /*@__PURE__*/(function (CanvasLayerRenderer) {\n  function CanvasVectorLayerRenderer(vectorLayer) {\n\n    CanvasLayerRenderer.call(this, vectorLayer);\n\n    /**\n     * Declutter tree.\n     * @private\n     */\n    this.declutterTree_ = vectorLayer.getDeclutter() ? rbush(9, undefined) : null;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.dirty_ = false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedRevision_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedResolution_ = NaN;\n\n    /**\n     * @private\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.renderedExtent_ = createEmpty();\n\n    /**\n     * @private\n     * @type {function(import(\"../../Feature.js\").default, import(\"../../Feature.js\").default): number|null}\n     */\n    this.renderedRenderOrder_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../render/canvas/ReplayGroup.js\").default}\n     */\n    this.replayGroup_ = null;\n\n    /**\n     * A new replay group had to be created by `prepareFrame()`\n     * @type {boolean}\n     */\n    this.replayGroupChanged = true;\n\n    /**\n     * @type {CanvasRenderingContext2D}\n     */\n    this.context = createCanvasContext2D();\n\n    listen(labelCache, EventType.CLEAR, this.handleFontsChanged_, this);\n\n  }\n\n  if ( CanvasLayerRenderer ) CanvasVectorLayerRenderer.__proto__ = CanvasLayerRenderer;\n  CanvasVectorLayerRenderer.prototype = Object.create( CanvasLayerRenderer && CanvasLayerRenderer.prototype );\n  CanvasVectorLayerRenderer.prototype.constructor = CanvasVectorLayerRenderer;\n\n  /**\n   * @inheritDoc\n   */\n  CanvasVectorLayerRenderer.prototype.disposeInternal = function disposeInternal () {\n    unlisten(labelCache, EventType.CLEAR, this.handleFontsChanged_, this);\n    CanvasLayerRenderer.prototype.disposeInternal.call(this);\n  };\n\n  /**\n   * @param {CanvasRenderingContext2D} context Context.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../layer/Layer.js\").State} layerState Layer state.\n   */\n  CanvasVectorLayerRenderer.prototype.compose = function compose (context, frameState, layerState) {\n    var extent = frameState.extent;\n    var pixelRatio = frameState.pixelRatio;\n    var skippedFeatureUids = layerState.managed ?\n      frameState.skippedFeatureUids : {};\n    var viewState = frameState.viewState;\n    var projection = viewState.projection;\n    var rotation = viewState.rotation;\n    var projectionExtent = projection.getExtent();\n    var vectorSource = /** @type {import(\"../../source/Vector.js\").default} */ (this.getLayer().getSource());\n\n    var transform = this.getTransform(frameState, 0);\n\n    // clipped rendering if layer extent is set\n    var clipExtent = layerState.extent;\n    var clipped = clipExtent !== undefined;\n    if (clipped) {\n      this.clip(context, frameState, /** @type {import(\"../../extent.js\").Extent} */ (clipExtent));\n    }\n    var replayGroup = this.replayGroup_;\n    if (replayGroup && !replayGroup.isEmpty()) {\n      if (this.declutterTree_) {\n        this.declutterTree_.clear();\n      }\n      var layer = /** @type {import(\"../../layer/Vector.js\").default} */ (this.getLayer());\n      var drawOffsetX = 0;\n      var drawOffsetY = 0;\n      var replayContext;\n      var transparentLayer = layerState.opacity !== 1;\n      var hasRenderListeners = layer.hasListener(RenderEventType.RENDER);\n      if (transparentLayer || hasRenderListeners) {\n        var drawWidth = context.canvas.width;\n        var drawHeight = context.canvas.height;\n        if (rotation) {\n          var drawSize = Math.round(Math.sqrt(drawWidth * drawWidth + drawHeight * drawHeight));\n          drawOffsetX = (drawSize - drawWidth) / 2;\n          drawOffsetY = (drawSize - drawHeight) / 2;\n          drawWidth = drawHeight = drawSize;\n        }\n        // resize and clear\n        this.context.canvas.width = drawWidth;\n        this.context.canvas.height = drawHeight;\n        replayContext = this.context;\n      } else {\n        replayContext = context;\n      }\n\n      var alpha = replayContext.globalAlpha;\n      if (!transparentLayer) {\n        // for performance reasons, context.save / context.restore is not used\n        // to save and restore the transformation matrix and the opacity.\n        // see http://jsperf.com/context-save-restore-versus-variable\n        replayContext.globalAlpha = layerState.opacity;\n      }\n\n      if (replayContext != context) {\n        replayContext.translate(drawOffsetX, drawOffsetY);\n      }\n\n      var viewHints = frameState.viewHints;\n      var snapToPixel = !(viewHints[ViewHint.ANIMATING] || viewHints[ViewHint.INTERACTING]);\n      var width = frameState.size[0] * pixelRatio;\n      var height = frameState.size[1] * pixelRatio;\n      rotateAtOffset(replayContext, -rotation,\n        width / 2, height / 2);\n      replayGroup.replay(replayContext, transform, rotation, skippedFeatureUids, snapToPixel);\n      if (vectorSource.getWrapX() && projection.canWrapX() &&\n          !containsExtent(projectionExtent, extent)) {\n        var startX = extent[0];\n        var worldWidth = getWidth(projectionExtent);\n        var world = 0;\n        var offsetX;\n        while (startX < projectionExtent[0]) {\n          --world;\n          offsetX = worldWidth * world;\n          transform = this.getTransform(frameState, offsetX);\n          replayGroup.replay(replayContext, transform, rotation, skippedFeatureUids, snapToPixel);\n          startX += worldWidth;\n        }\n        world = 0;\n        startX = extent[2];\n        while (startX > projectionExtent[2]) {\n          ++world;\n          offsetX = worldWidth * world;\n          transform = this.getTransform(frameState, offsetX);\n          replayGroup.replay(replayContext, transform, rotation, skippedFeatureUids, snapToPixel);\n          startX -= worldWidth;\n        }\n      }\n      rotateAtOffset(replayContext, rotation,\n        width / 2, height / 2);\n\n      if (hasRenderListeners) {\n        this.dispatchRenderEvent(replayContext, frameState, transform);\n      }\n      if (replayContext != context) {\n        if (transparentLayer) {\n          var mainContextAlpha = context.globalAlpha;\n          context.globalAlpha = layerState.opacity;\n          context.drawImage(replayContext.canvas, -drawOffsetX, -drawOffsetY);\n          context.globalAlpha = mainContextAlpha;\n        } else {\n          context.drawImage(replayContext.canvas, -drawOffsetX, -drawOffsetY);\n        }\n        replayContext.translate(-drawOffsetX, -drawOffsetY);\n      }\n\n      if (!transparentLayer) {\n        replayContext.globalAlpha = alpha;\n      }\n    }\n\n    if (clipped) {\n      context.restore();\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasVectorLayerRenderer.prototype.composeFrame = function composeFrame (frameState, layerState, context) {\n    var transform = this.getTransform(frameState, 0);\n    this.preCompose(context, frameState, transform);\n    this.compose(context, frameState, layerState);\n    this.postCompose(context, frameState, layerState, transform);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasVectorLayerRenderer.prototype.forEachFeatureAtCoordinate = function forEachFeatureAtCoordinate (coordinate, frameState, hitTolerance, callback, thisArg) {\n    if (!this.replayGroup_) {\n      return undefined;\n    } else {\n      var resolution = frameState.viewState.resolution;\n      var rotation = frameState.viewState.rotation;\n      var layer = /** @type {import(\"../../layer/Vector.js\").default} */ (this.getLayer());\n      /** @type {!Object<string, boolean>} */\n      var features = {};\n      var result = this.replayGroup_.forEachFeatureAtCoordinate(coordinate, resolution, rotation, hitTolerance, {},\n        /**\n         * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n         * @return {?} Callback result.\n         */\n        function(feature) {\n          var key = getUid(feature);\n          if (!(key in features)) {\n            features[key] = true;\n            return callback.call(thisArg, feature, layer);\n          }\n        }, null);\n      return result;\n    }\n  };\n\n  /**\n   * @param {import(\"../../events/Event.js\").default} event Event.\n   */\n  CanvasVectorLayerRenderer.prototype.handleFontsChanged_ = function handleFontsChanged_ (event) {\n    var layer = this.getLayer();\n    if (layer.getVisible() && this.replayGroup_) {\n      layer.changed();\n    }\n  };\n\n  /**\n   * Handle changes in image style state.\n   * @param {import(\"../../events/Event.js\").default} event Image style change event.\n   * @private\n   */\n  CanvasVectorLayerRenderer.prototype.handleStyleImageChange_ = function handleStyleImageChange_ (event) {\n    this.renderIfReadyAndVisible();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasVectorLayerRenderer.prototype.prepareFrame = function prepareFrame (frameState, layerState) {\n    var vectorLayer = /** @type {import(\"../../layer/Vector.js\").default} */ (this.getLayer());\n    var vectorSource = /** @type {import(\"../../source/Vector.js\").default} */ (vectorLayer.getSource());\n\n    var animating = frameState.viewHints[ViewHint.ANIMATING];\n    var interacting = frameState.viewHints[ViewHint.INTERACTING];\n    var updateWhileAnimating = vectorLayer.getUpdateWhileAnimating();\n    var updateWhileInteracting = vectorLayer.getUpdateWhileInteracting();\n\n    if (!this.dirty_ && (!updateWhileAnimating && animating) ||\n        (!updateWhileInteracting && interacting)) {\n      return true;\n    }\n\n    var frameStateExtent = frameState.extent;\n    var viewState = frameState.viewState;\n    var projection = viewState.projection;\n    var resolution = viewState.resolution;\n    var pixelRatio = frameState.pixelRatio;\n    var vectorLayerRevision = vectorLayer.getRevision();\n    var vectorLayerRenderBuffer = vectorLayer.getRenderBuffer();\n    var vectorLayerRenderOrder = vectorLayer.getRenderOrder();\n\n    if (vectorLayerRenderOrder === undefined) {\n      vectorLayerRenderOrder = defaultRenderOrder;\n    }\n\n    var extent = buffer(frameStateExtent,\n      vectorLayerRenderBuffer * resolution);\n    var projectionExtent = viewState.projection.getExtent();\n\n    if (vectorSource.getWrapX() && viewState.projection.canWrapX() &&\n        !containsExtent(projectionExtent, frameState.extent)) {\n      // For the replay group, we need an extent that intersects the real world\n      // (-180° to +180°). To support geometries in a coordinate range from -540°\n      // to +540°, we add at least 1 world width on each side of the projection\n      // extent. If the viewport is wider than the world, we need to add half of\n      // the viewport width to make sure we cover the whole viewport.\n      var worldWidth = getWidth(projectionExtent);\n      var gutter = Math.max(getWidth(extent) / 2, worldWidth);\n      extent[0] = projectionExtent[0] - gutter;\n      extent[2] = projectionExtent[2] + gutter;\n    }\n\n    if (!this.dirty_ &&\n        this.renderedResolution_ == resolution &&\n        this.renderedRevision_ == vectorLayerRevision &&\n        this.renderedRenderOrder_ == vectorLayerRenderOrder &&\n        containsExtent(this.renderedExtent_, extent)) {\n      this.replayGroupChanged = false;\n      return true;\n    }\n\n    this.replayGroup_ = null;\n\n    this.dirty_ = false;\n\n    var replayGroup = new CanvasReplayGroup(\n      getRenderTolerance(resolution, pixelRatio), extent, resolution,\n      pixelRatio, vectorSource.getOverlaps(), this.declutterTree_, vectorLayer.getRenderBuffer());\n    vectorSource.loadFeatures(extent, resolution, projection);\n    /**\n     * @param {import(\"../../Feature.js\").default} feature Feature.\n     * @this {CanvasVectorLayerRenderer}\n     */\n    var render = function(feature) {\n      var styles;\n      var styleFunction = feature.getStyleFunction() || vectorLayer.getStyleFunction();\n      if (styleFunction) {\n        styles = styleFunction(feature, resolution);\n      }\n      if (styles) {\n        var dirty = this.renderFeature(\n          feature, resolution, pixelRatio, styles, replayGroup);\n        this.dirty_ = this.dirty_ || dirty;\n      }\n    }.bind(this);\n    if (vectorLayerRenderOrder) {\n      /** @type {Array<import(\"../../Feature.js\").default>} */\n      var features = [];\n      vectorSource.forEachFeatureInExtent(extent,\n        /**\n         * @param {import(\"../../Feature.js\").default} feature Feature.\n         */\n        function(feature) {\n          features.push(feature);\n        });\n      features.sort(vectorLayerRenderOrder);\n      for (var i = 0, ii = features.length; i < ii; ++i) {\n        render(features[i]);\n      }\n    } else {\n      vectorSource.forEachFeatureInExtent(extent, render);\n    }\n    replayGroup.finish();\n\n    this.renderedResolution_ = resolution;\n    this.renderedRevision_ = vectorLayerRevision;\n    this.renderedRenderOrder_ = vectorLayerRenderOrder;\n    this.renderedExtent_ = extent;\n    this.replayGroup_ = replayGroup;\n\n    this.replayGroupChanged = true;\n    return true;\n  };\n\n  /**\n   * @param {import(\"../../Feature.js\").default} feature Feature.\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../../style/Style.js\").default|Array<import(\"../../style/Style.js\").default>} styles The style or array of styles.\n   * @param {import(\"../../render/canvas/ReplayGroup.js\").default} replayGroup Replay group.\n   * @return {boolean} `true` if an image is loading.\n   */\n  CanvasVectorLayerRenderer.prototype.renderFeature = function renderFeature$1 (feature, resolution, pixelRatio, styles, replayGroup) {\n    if (!styles) {\n      return false;\n    }\n    var loading = false;\n    if (Array.isArray(styles)) {\n      for (var i = 0, ii = styles.length; i < ii; ++i) {\n        loading = renderFeature(\n          replayGroup, feature, styles[i],\n          getSquaredRenderTolerance(resolution, pixelRatio),\n          this.handleStyleImageChange_, this) || loading;\n      }\n    } else {\n      loading = renderFeature(\n        replayGroup, feature, styles,\n        getSquaredRenderTolerance(resolution, pixelRatio),\n        this.handleStyleImageChange_, this);\n    }\n    return loading;\n  };\n\n  return CanvasVectorLayerRenderer;\n}(CanvasLayerRenderer));\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {import(\"../../layer/Layer.js\").default} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nCanvasVectorLayerRenderer['handles'] = function(layer) {\n  return layer.getType() === LayerType.VECTOR;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {import(\"../Map.js\").default} mapRenderer The map renderer.\n * @param {import(\"../../layer/Layer.js\").default} layer The layer to be rendererd.\n * @return {CanvasVectorLayerRenderer} The layer renderer.\n */\nCanvasVectorLayerRenderer['create'] = function(mapRenderer, layer) {\n  return new CanvasVectorLayerRenderer(/** @type {import(\"../../layer/Vector.js\").default} */ (layer));\n};\n\n\nexport default CanvasVectorLayerRenderer;\n\n//# sourceMappingURL=VectorLayer.js.map","/**\n * @module ol/layer/VectorTileRenderType\n */\n\n/**\n * @enum {string}\n * Render mode for vector tiles:\n *  * `'image'`: Vector tiles are rendered as images. Great performance, but\n *    point symbols and texts are always rotated with the view and pixels are\n *    scaled during zoom animations.\n *  * `'hybrid'`: Polygon and line elements are rendered as images, so pixels\n *    are scaled during zoom animations. Point symbols and texts are accurately\n *    rendered as vectors and can stay upright on rotated views.\n *  * `'vector'`: Vector tiles are rendered as vectors. Most accurate rendering\n *    even during animations, but slower performance than the other options.\n * @api\n */\nexport default {\n  IMAGE: 'image',\n  HYBRID: 'hybrid',\n  VECTOR: 'vector'\n};\n\n//# sourceMappingURL=VectorTileRenderType.js.map","/**\n * @module ol/renderer/canvas/VectorTileLayer\n */\nimport {getUid} from '../../util.js';\nimport LayerType from '../../LayerType.js';\nimport TileState from '../../TileState.js';\nimport ViewHint from '../../ViewHint.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {listen, unlisten} from '../../events.js';\nimport EventType from '../../events/EventType.js';\nimport rbush from 'rbush';\nimport {buffer, containsCoordinate, equals, getIntersection, getTopLeft, intersects} from '../../extent.js';\nimport VectorTileRenderType from '../../layer/VectorTileRenderType.js';\nimport {equivalent as equivalentProjection} from '../../proj.js';\nimport Units from '../../proj/Units.js';\nimport ReplayType from '../../render/ReplayType.js';\nimport {labelCache, rotateAtOffset} from '../../render/canvas.js';\nimport CanvasReplayGroup, {replayDeclutter} from '../../render/canvas/ReplayGroup.js';\nimport {ORDER} from '../../render/replay.js';\nimport CanvasTileLayerRenderer from './TileLayer.js';\nimport {getSquaredTolerance as getSquaredRenderTolerance, renderFeature} from '../vector.js';\nimport {\n  create as createTransform,\n  compose as composeTransform,\n  reset as resetTransform,\n  scale as scaleTransform,\n  translate as translateTransform\n} from '../../transform.js';\n\n\n/**\n * @type {!Object<string, Array<import(\"../../render/ReplayType.js\").default>>}\n */\nvar IMAGE_REPLAYS = {\n  'image': [ReplayType.POLYGON, ReplayType.CIRCLE,\n    ReplayType.LINE_STRING, ReplayType.IMAGE, ReplayType.TEXT],\n  'hybrid': [ReplayType.POLYGON, ReplayType.LINE_STRING]\n};\n\n\n/**\n * @type {!Object<string, Array<import(\"../../render/ReplayType.js\").default>>}\n */\nvar VECTOR_REPLAYS = {\n  'image': [ReplayType.DEFAULT],\n  'hybrid': [ReplayType.IMAGE, ReplayType.TEXT, ReplayType.DEFAULT],\n  'vector': ORDER\n};\n\n\n/**\n * @classdesc\n * Canvas renderer for vector tile layers.\n * @api\n */\nvar CanvasVectorTileLayerRenderer = /*@__PURE__*/(function (CanvasTileLayerRenderer) {\n  function CanvasVectorTileLayerRenderer(layer) {\n\n    CanvasTileLayerRenderer.call(this, layer, true);\n\n    /**\n     * Declutter tree.\n     * @private\n     */\n    this.declutterTree_ = layer.getDeclutter() ? rbush(9, undefined) : null;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.dirty_ = false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedLayerRevision_;\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.tmpTransform_ = createTransform();\n\n    var renderMode = layer.getRenderMode();\n\n    // Use lower resolution for pure vector rendering. Closest resolution otherwise.\n    this.zDirection = renderMode === VectorTileRenderType.VECTOR ? 1 : 0;\n\n    if (renderMode !== VectorTileRenderType.VECTOR) {\n      this.context = createCanvasContext2D();\n    }\n\n\n    listen(labelCache, EventType.CLEAR, this.handleFontsChanged_, this);\n\n  }\n\n  if ( CanvasTileLayerRenderer ) CanvasVectorTileLayerRenderer.__proto__ = CanvasTileLayerRenderer;\n  CanvasVectorTileLayerRenderer.prototype = Object.create( CanvasTileLayerRenderer && CanvasTileLayerRenderer.prototype );\n  CanvasVectorTileLayerRenderer.prototype.constructor = CanvasVectorTileLayerRenderer;\n\n  /**\n   * @inheritDoc\n   */\n  CanvasVectorTileLayerRenderer.prototype.disposeInternal = function disposeInternal () {\n    unlisten(labelCache, EventType.CLEAR, this.handleFontsChanged_, this);\n    CanvasTileLayerRenderer.prototype.disposeInternal.call(this);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasVectorTileLayerRenderer.prototype.getTile = function getTile (z, x, y, pixelRatio, projection) {\n    var tile = CanvasTileLayerRenderer.prototype.getTile.call(this, z, x, y, pixelRatio, projection);\n    if (tile.getState() === TileState.LOADED) {\n      this.createReplayGroup_(/** @type {import(\"../../VectorImageTile.js\").default} */ (tile), pixelRatio, projection);\n      if (this.context) {\n        this.renderTileImage_(/** @type {import(\"../../VectorImageTile.js\").default} */ (tile), pixelRatio, projection);\n      }\n    }\n    return tile;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasVectorTileLayerRenderer.prototype.getTileImage = function getTileImage (tile) {\n    var tileLayer = /** @type {import(\"../../layer/Tile.js\").default} */ (this.getLayer());\n    return /** @type {import(\"../../VectorImageTile.js\").default} */ (tile).getImage(tileLayer);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasVectorTileLayerRenderer.prototype.prepareFrame = function prepareFrame (frameState, layerState) {\n    var layer = /** @type {import(\"../../layer/Vector.js\").default} */ (this.getLayer());\n    var layerRevision = layer.getRevision();\n    if (this.renderedLayerRevision_ != layerRevision) {\n      this.renderedTiles.length = 0;\n    }\n    this.renderedLayerRevision_ = layerRevision;\n    return CanvasTileLayerRenderer.prototype.prepareFrame.call(this, frameState, layerState);\n  };\n\n  /**\n   * @param {import(\"../../VectorImageTile.js\").default} tile Tile.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../../proj/Projection.js\").default} projection Projection.\n   * @private\n   */\n  CanvasVectorTileLayerRenderer.prototype.createReplayGroup_ = function createReplayGroup_ (tile, pixelRatio, projection) {\n    var this$1 = this;\n\n    var layer = /** @type {import(\"../../layer/Vector.js\").default} */ (this.getLayer());\n    var revision = layer.getRevision();\n    var renderOrder = /** @type {import(\"../../render.js\").OrderFunction} */ (layer.getRenderOrder()) || null;\n\n    var replayState = tile.getReplayState(layer);\n    if (!replayState.dirty && replayState.renderedRevision == revision &&\n        replayState.renderedRenderOrder == renderOrder) {\n      return;\n    }\n\n    var source = /** @type {import(\"../../source/VectorTile.js\").default} */ (layer.getSource());\n    var sourceTileGrid = source.getTileGrid();\n    var tileGrid = source.getTileGridForProjection(projection);\n    var resolution = tileGrid.getResolution(tile.tileCoord[0]);\n    var tileExtent = tile.extent;\n\n    var loop = function ( t, tt ) {\n      var sourceTile = tile.getTile(tile.tileKeys[t]);\n      if (sourceTile.getState() != TileState.LOADED) {\n        return;\n      }\n\n      var sourceTileCoord = sourceTile.tileCoord;\n      var sourceTileExtent = sourceTileGrid.getTileCoordExtent(sourceTileCoord);\n      var sharedExtent = getIntersection(tileExtent, sourceTileExtent);\n      var bufferedExtent = equals(sourceTileExtent, sharedExtent) ? null :\n        buffer(sharedExtent, layer.getRenderBuffer() * resolution, this$1.tmpExtent);\n      var tileProjection = sourceTile.getProjection();\n      var reproject = false;\n      if (!equivalentProjection(projection, tileProjection)) {\n        reproject = true;\n        sourceTile.setProjection(projection);\n      }\n      replayState.dirty = false;\n      var replayGroup = new CanvasReplayGroup(0, sharedExtent, resolution,\n        pixelRatio, source.getOverlaps(), this$1.declutterTree_, layer.getRenderBuffer());\n      var squaredTolerance = getSquaredRenderTolerance(resolution, pixelRatio);\n\n      /**\n       * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n       * @this {CanvasVectorTileLayerRenderer}\n       */\n      var render = function(feature) {\n        var styles;\n        var styleFunction = feature.getStyleFunction() || layer.getStyleFunction();\n        if (styleFunction) {\n          styles = styleFunction(feature, resolution);\n        }\n        if (styles) {\n          var dirty = this.renderFeature(feature, squaredTolerance, styles, replayGroup);\n          this.dirty_ = this.dirty_ || dirty;\n          replayState.dirty = replayState.dirty || dirty;\n        }\n      };\n\n      var features = sourceTile.getFeatures();\n      if (renderOrder && renderOrder !== replayState.renderedRenderOrder) {\n        features.sort(renderOrder);\n      }\n      for (var i = 0, ii = features.length; i < ii; ++i) {\n        var feature = features[i];\n        if (reproject) {\n          if (tileProjection.getUnits() == Units.TILE_PIXELS) {\n            // projected tile extent\n            tileProjection.setWorldExtent(sourceTileExtent);\n            // tile extent in tile pixel space\n            tileProjection.setExtent(sourceTile.getExtent());\n          }\n          feature.getGeometry().transform(tileProjection, projection);\n        }\n        if (!bufferedExtent || intersects(bufferedExtent, feature.getGeometry().getExtent())) {\n          render.call(this$1, feature);\n        }\n      }\n      replayGroup.finish();\n      sourceTile.setReplayGroup(layer, tile.tileCoord.toString(), replayGroup);\n    };\n\n    for (var t = 0, tt = tile.tileKeys.length; t < tt; ++t) loop( t, tt );\n    replayState.renderedRevision = revision;\n    replayState.renderedRenderOrder = renderOrder;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasVectorTileLayerRenderer.prototype.forEachFeatureAtCoordinate = function forEachFeatureAtCoordinate (coordinate, frameState, hitTolerance, callback, thisArg) {\n    var resolution = frameState.viewState.resolution;\n    var rotation = frameState.viewState.rotation;\n    hitTolerance = hitTolerance == undefined ? 0 : hitTolerance;\n    var layer = this.getLayer();\n    /** @type {!Object<string, boolean>} */\n    var features = {};\n\n    var renderedTiles = /** @type {Array<import(\"../../VectorImageTile.js\").default>} */ (this.renderedTiles);\n\n    var bufferedExtent, found;\n    var i, ii;\n    for (i = 0, ii = renderedTiles.length; i < ii; ++i) {\n      var tile = renderedTiles[i];\n      bufferedExtent = buffer(tile.extent, hitTolerance * resolution, bufferedExtent);\n      if (!containsCoordinate(bufferedExtent, coordinate)) {\n        continue;\n      }\n      for (var t = 0, tt = tile.tileKeys.length; t < tt; ++t) {\n        var sourceTile = tile.getTile(tile.tileKeys[t]);\n        if (sourceTile.getState() != TileState.LOADED) {\n          continue;\n        }\n        var replayGroup = /** @type {CanvasReplayGroup} */ (sourceTile.getReplayGroup(layer,\n          tile.tileCoord.toString()));\n        found = found || replayGroup.forEachFeatureAtCoordinate(coordinate, resolution, rotation, hitTolerance, {},\n          /**\n           * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n           * @return {?} Callback result.\n           */\n          function(feature) {\n            var key = getUid(feature);\n            if (!(key in features)) {\n              features[key] = true;\n              return callback.call(thisArg, feature, layer);\n            }\n          }, null);\n      }\n    }\n    return found;\n  };\n\n  /**\n   * @param {import(\"../../VectorTile.js\").default} tile Tile.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @return {import(\"../../transform.js\").Transform} transform Transform.\n   * @private\n   */\n  CanvasVectorTileLayerRenderer.prototype.getReplayTransform_ = function getReplayTransform_ (tile, frameState) {\n    var layer = this.getLayer();\n    var source = /** @type {import(\"../../source/VectorTile.js\").default} */ (layer.getSource());\n    var tileGrid = source.getTileGrid();\n    var tileCoord = tile.tileCoord;\n    var tileResolution = tileGrid.getResolution(tileCoord[0]);\n    var viewState = frameState.viewState;\n    var pixelRatio = frameState.pixelRatio;\n    var renderResolution = viewState.resolution / pixelRatio;\n    var tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent);\n    var center = viewState.center;\n    var origin = getTopLeft(tileExtent);\n    var size = frameState.size;\n    var offsetX = Math.round(pixelRatio * size[0] / 2);\n    var offsetY = Math.round(pixelRatio * size[1] / 2);\n    return composeTransform(this.tmpTransform_,\n      offsetX, offsetY,\n      tileResolution / renderResolution, tileResolution / renderResolution,\n      viewState.rotation,\n      (origin[0] - center[0]) / tileResolution,\n      (center[1] - origin[1]) / tileResolution);\n  };\n\n  /**\n   * @param {import(\"../../events/Event.js\").default} event Event.\n   */\n  CanvasVectorTileLayerRenderer.prototype.handleFontsChanged_ = function handleFontsChanged_ (event) {\n    var layer = this.getLayer();\n    if (layer.getVisible() && this.renderedLayerRevision_ !== undefined) {\n      layer.changed();\n    }\n  };\n\n  /**\n   * Handle changes in image style state.\n   * @param {import(\"../../events/Event.js\").default} event Image style change event.\n   * @private\n   */\n  CanvasVectorTileLayerRenderer.prototype.handleStyleImageChange_ = function handleStyleImageChange_ (event) {\n    this.renderIfReadyAndVisible();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  CanvasVectorTileLayerRenderer.prototype.postCompose = function postCompose (context, frameState, layerState) {\n    var layer = /** @type {import(\"../../layer/Vector.js\").default} */ (this.getLayer());\n    var renderMode = layer.getRenderMode();\n    if (renderMode != VectorTileRenderType.IMAGE) {\n      var declutterReplays = layer.getDeclutter() ? {} : null;\n      var source = /** @type {import(\"../../source/VectorTile.js\").default} */ (layer.getSource());\n      var replayTypes = VECTOR_REPLAYS[renderMode];\n      var pixelRatio = frameState.pixelRatio;\n      var rotation = frameState.viewState.rotation;\n      var size = frameState.size;\n      var offsetX, offsetY;\n      if (rotation) {\n        offsetX = Math.round(pixelRatio * size[0] / 2);\n        offsetY = Math.round(pixelRatio * size[1] / 2);\n        rotateAtOffset(context, -rotation, offsetX, offsetY);\n      }\n      if (declutterReplays) {\n        this.declutterTree_.clear();\n      }\n      var viewHints = frameState.viewHints;\n      var snapToPixel = !(viewHints[ViewHint.ANIMATING] || viewHints[ViewHint.INTERACTING]);\n      var tiles = this.renderedTiles;\n      var tileGrid = source.getTileGridForProjection(frameState.viewState.projection);\n      var clips = [];\n      var zs = [];\n      for (var i = tiles.length - 1; i >= 0; --i) {\n        var tile = /** @type {import(\"../../VectorImageTile.js\").default} */ (tiles[i]);\n        if (tile.getState() == TileState.ABORT) {\n          continue;\n        }\n        var tileCoord = tile.tileCoord;\n        var worldOffset = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent)[0] - tile.extent[0];\n        var transform = undefined;\n        for (var t = 0, tt = tile.tileKeys.length; t < tt; ++t) {\n          var sourceTile = tile.getTile(tile.tileKeys[t]);\n          if (sourceTile.getState() != TileState.LOADED) {\n            continue;\n          }\n          var replayGroup = /** @type {CanvasReplayGroup} */ (sourceTile.getReplayGroup(layer, tileCoord.toString()));\n          if (!replayGroup || !replayGroup.hasReplays(replayTypes)) {\n            // sourceTile was not yet loaded when this.createReplayGroup_() was\n            // called, or it has no replays of the types we want to render\n            continue;\n          }\n          if (!transform) {\n            transform = this.getTransform(frameState, worldOffset);\n          }\n          var currentZ = sourceTile.tileCoord[0];\n          var currentClip = replayGroup.getClipCoords(transform);\n          context.save();\n          context.globalAlpha = layerState.opacity;\n          // Create a clip mask for regions in this low resolution tile that are\n          // already filled by a higher resolution tile\n          for (var j = 0, jj = clips.length; j < jj; ++j) {\n            var clip = clips[j];\n            if (currentZ < zs[j]) {\n              context.beginPath();\n              // counter-clockwise (outer ring) for current tile\n              context.moveTo(currentClip[0], currentClip[1]);\n              context.lineTo(currentClip[2], currentClip[3]);\n              context.lineTo(currentClip[4], currentClip[5]);\n              context.lineTo(currentClip[6], currentClip[7]);\n              // clockwise (inner ring) for higher resolution tile\n              context.moveTo(clip[6], clip[7]);\n              context.lineTo(clip[4], clip[5]);\n              context.lineTo(clip[2], clip[3]);\n              context.lineTo(clip[0], clip[1]);\n              context.clip();\n            }\n          }\n          replayGroup.replay(context, transform, rotation, {}, snapToPixel, replayTypes, declutterReplays);\n          context.restore();\n          clips.push(currentClip);\n          zs.push(currentZ);\n        }\n      }\n      if (declutterReplays) {\n        replayDeclutter(declutterReplays, context, rotation, snapToPixel);\n      }\n      if (rotation) {\n        rotateAtOffset(context, rotation,\n          /** @type {number} */ (offsetX), /** @type {number} */ (offsetY));\n      }\n    }\n    CanvasTileLayerRenderer.prototype.postCompose.call(this, context, frameState, layerState);\n  };\n\n  /**\n   * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n   * @param {number} squaredTolerance Squared tolerance.\n   * @param {import(\"../../style/Style.js\").default|Array<import(\"../../style/Style.js\").default>} styles The style or array of styles.\n   * @param {import(\"../../render/canvas/ReplayGroup.js\").default} replayGroup Replay group.\n   * @return {boolean} `true` if an image is loading.\n   */\n  CanvasVectorTileLayerRenderer.prototype.renderFeature = function renderFeature$1 (feature, squaredTolerance, styles, replayGroup) {\n    if (!styles) {\n      return false;\n    }\n    var loading = false;\n    if (Array.isArray(styles)) {\n      for (var i = 0, ii = styles.length; i < ii; ++i) {\n        loading = renderFeature(\n          replayGroup, feature, styles[i], squaredTolerance,\n          this.handleStyleImageChange_, this) || loading;\n      }\n    } else {\n      loading = renderFeature(\n        replayGroup, feature, styles, squaredTolerance,\n        this.handleStyleImageChange_, this);\n    }\n    return loading;\n  };\n\n  /**\n   * @param {import(\"../../VectorImageTile.js\").default} tile Tile.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../../proj/Projection.js\").default} projection Projection.\n   * @private\n   */\n  CanvasVectorTileLayerRenderer.prototype.renderTileImage_ = function renderTileImage_ (tile, pixelRatio, projection) {\n    var layer = /** @type {import(\"../../layer/Vector.js\").default} */ (this.getLayer());\n    var replayState = tile.getReplayState(layer);\n    var revision = layer.getRevision();\n    var replays = IMAGE_REPLAYS[layer.getRenderMode()];\n    if (replays && replayState.renderedTileRevision !== revision) {\n      replayState.renderedTileRevision = revision;\n      var tileCoord = tile.wrappedTileCoord;\n      var z = tileCoord[0];\n      var source = /** @type {import(\"../../source/VectorTile.js\").default} */ (layer.getSource());\n      var tileGrid = source.getTileGridForProjection(projection);\n      var resolution = tileGrid.getResolution(z);\n      var context = tile.getContext(layer);\n      var size = source.getTilePixelSize(z, pixelRatio, projection);\n      context.canvas.width = size[0];\n      context.canvas.height = size[1];\n      var tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent);\n      for (var i = 0, ii = tile.tileKeys.length; i < ii; ++i) {\n        var sourceTile = tile.getTile(tile.tileKeys[i]);\n        if (sourceTile.getState() != TileState.LOADED) {\n          continue;\n        }\n        var pixelScale = pixelRatio / resolution;\n        var transform = resetTransform(this.tmpTransform_);\n        scaleTransform(transform, pixelScale, -pixelScale);\n        translateTransform(transform, -tileExtent[0], -tileExtent[3]);\n        var replayGroup = /** @type {CanvasReplayGroup} */ (sourceTile.getReplayGroup(layer,\n          tile.tileCoord.toString()));\n        replayGroup.replay(context, transform, 0, {}, true, replays);\n      }\n    }\n  };\n\n  return CanvasVectorTileLayerRenderer;\n}(CanvasTileLayerRenderer));\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {import(\"../../layer/Layer.js\").default} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nCanvasVectorTileLayerRenderer['handles'] = function(layer) {\n  return layer.getType() === LayerType.VECTOR_TILE;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {import(\"../Map.js\").default} mapRenderer The map renderer.\n * @param {import(\"../../layer/Layer.js\").default} layer The layer to be rendererd.\n * @return {CanvasVectorTileLayerRenderer} The layer renderer.\n */\nCanvasVectorTileLayerRenderer['create'] = function(mapRenderer, layer) {\n  return new CanvasVectorTileLayerRenderer(/** @type {import(\"../../layer/VectorTile.js\").default} */ (layer));\n};\n\n\nexport default CanvasVectorTileLayerRenderer;\n\n//# sourceMappingURL=VectorTileLayer.js.map","/**\n * @module ol/Map\n */\nimport PluggableMap from './PluggableMap.js';\nimport {defaults as defaultControls} from './control/util.js';\nimport {defaults as defaultInteractions} from './interaction.js';\nimport {assign} from './obj.js';\nimport CanvasImageLayerRenderer from './renderer/canvas/ImageLayer.js';\nimport CanvasMapRenderer from './renderer/canvas/Map.js';\nimport CanvasTileLayerRenderer from './renderer/canvas/TileLayer.js';\nimport CanvasVectorLayerRenderer from './renderer/canvas/VectorLayer.js';\nimport CanvasVectorTileLayerRenderer from './renderer/canvas/VectorTileLayer.js';\n\n/**\n * @classdesc\n * The map is the core component of OpenLayers. For a map to render, a view,\n * one or more layers, and a target container are needed:\n *\n *     import Map from 'ol/Map';\n *     import View from 'ol/View';\n *     import TileLayer from 'ol/layer/Tile';\n *     import OSM from 'ol/source/OSM';\n *\n *     var map = new Map({\n *       view: new View({\n *         center: [0, 0],\n *         zoom: 1\n *       }),\n *       layers: [\n *         new TileLayer({\n *           source: new OSM()\n *         })\n *       ],\n *       target: 'map'\n *     });\n *\n * The above snippet creates a map using a {@link module:ol/layer/Tile} to\n * display {@link module:ol/source/OSM~OSM} OSM data and render it to a DOM\n * element with the id `map`.\n *\n * The constructor places a viewport container (with CSS class name\n * `ol-viewport`) in the target element (see `getViewport()`), and then two\n * further elements within the viewport: one with CSS class name\n * `ol-overlaycontainer-stopevent` for controls and some overlays, and one with\n * CSS class name `ol-overlaycontainer` for other overlays (see the `stopEvent`\n * option of {@link module:ol/Overlay~Overlay} for the difference). The map\n * itself is placed in a further element within the viewport.\n *\n * Layers are stored as a {@link module:ol/Collection~Collection} in\n * layerGroups. A top-level group is provided by the library. This is what is\n * accessed by `getLayerGroup` and `setLayerGroup`. Layers entered in the\n * options are added to this group, and `addLayer` and `removeLayer` change the\n * layer collection in the group. `getLayers` is a convenience function for\n * `getLayerGroup().getLayers()`. Note that {@link module:ol/layer/Group~Group}\n * is a subclass of {@link module:ol/layer/Base}, so layers entered in the\n * options or added with `addLayer` can be groups, which can contain further\n * groups, and so on.\n *\n * @fires import(\"./MapBrowserEvent.js\").MapBrowserEvent\n * @fires import(\"./MapEvent.js\").MapEvent\n * @fires module:ol/render/Event~RenderEvent#postcompose\n * @fires module:ol/render/Event~RenderEvent#precompose\n * @api\n */\nvar Map = /*@__PURE__*/(function (PluggableMap) {\n  function Map(options) {\n    options = assign({}, options);\n    if (!options.controls) {\n      options.controls = defaultControls();\n    }\n    if (!options.interactions) {\n      options.interactions = defaultInteractions();\n    }\n\n    PluggableMap.call(this, options);\n  }\n\n  if ( PluggableMap ) Map.__proto__ = PluggableMap;\n  Map.prototype = Object.create( PluggableMap && PluggableMap.prototype );\n  Map.prototype.constructor = Map;\n\n  Map.prototype.createRenderer = function createRenderer () {\n    var renderer = new CanvasMapRenderer(this);\n    renderer.registerLayerRenderers([\n      CanvasImageLayerRenderer,\n      CanvasTileLayerRenderer,\n      CanvasVectorLayerRenderer,\n      CanvasVectorTileLayerRenderer\n    ]);\n    return renderer;\n  };\n\n  return Map;\n}(PluggableMap));\n\n\nexport default Map;\n\n//# sourceMappingURL=Map.js.map","/**\n * @module ol/webgl\n */\n\n\n/**\n * Constants taken from goog.webgl\n */\n\n\n/**\n * @const\n * @type {number}\n */\nexport var ONE = 1;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var SRC_ALPHA = 0x0302;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var COLOR_ATTACHMENT0 = 0x8CE0;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var COLOR_BUFFER_BIT = 0x00004000;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var TRIANGLES = 0x0004;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var TRIANGLE_STRIP = 0x0005;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var ONE_MINUS_SRC_ALPHA = 0x0303;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var ARRAY_BUFFER = 0x8892;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var ELEMENT_ARRAY_BUFFER = 0x8893;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var STREAM_DRAW = 0x88E0;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var STATIC_DRAW = 0x88E4;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var DYNAMIC_DRAW = 0x88E8;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var CULL_FACE = 0x0B44;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var BLEND = 0x0BE2;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var STENCIL_TEST = 0x0B90;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var DEPTH_TEST = 0x0B71;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var SCISSOR_TEST = 0x0C11;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var UNSIGNED_BYTE = 0x1401;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var UNSIGNED_SHORT = 0x1403;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var UNSIGNED_INT = 0x1405;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var FLOAT = 0x1406;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var RGBA = 0x1908;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var FRAGMENT_SHADER = 0x8B30;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var VERTEX_SHADER = 0x8B31;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var LINK_STATUS = 0x8B82;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var LINEAR = 0x2601;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var TEXTURE_MAG_FILTER = 0x2800;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var TEXTURE_MIN_FILTER = 0x2801;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var TEXTURE_WRAP_S = 0x2802;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var TEXTURE_WRAP_T = 0x2803;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var TEXTURE_2D = 0x0DE1;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var TEXTURE0 = 0x84C0;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var CLAMP_TO_EDGE = 0x812F;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var COMPILE_STATUS = 0x8B81;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var FRAMEBUFFER = 0x8D40;\n\n\n/** end of goog.webgl constants\n */\n\n\n/**\n * @const\n * @type {Array<string>}\n */\nvar CONTEXT_IDS = [\n  'experimental-webgl',\n  'webgl',\n  'webkit-3d',\n  'moz-webgl'\n];\n\n\n/**\n * @param {HTMLCanvasElement} canvas Canvas.\n * @param {Object=} opt_attributes Attributes.\n * @return {WebGLRenderingContext} WebGL rendering context.\n */\nexport function getContext(canvas, opt_attributes) {\n  var ii = CONTEXT_IDS.length;\n  for (var i = 0; i < ii; ++i) {\n    try {\n      var context = canvas.getContext(CONTEXT_IDS[i], opt_attributes);\n      if (context) {\n        return /** @type {!WebGLRenderingContext} */ (context);\n      }\n    } catch (e) {\n      // pass\n    }\n  }\n  return null;\n}\n\n\n/**\n * Include debuggable shader sources.  Default is `true`. This should be set to\n * `false` for production builds.\n * @type {boolean}\n */\nexport var DEBUG = true;\n\n\n/**\n * The maximum supported WebGL texture size in pixels. If WebGL is not\n * supported, the value is set to `undefined`.\n * @type {number|undefined}\n */\nvar MAX_TEXTURE_SIZE; // value is set below\n\n\n/**\n * List of supported WebGL extensions.\n * @type {Array<string>}\n */\nvar EXTENSIONS; // value is set below\n\n\n/**\n * True if both OpenLayers and browser support WebGL.\n * @type {boolean}\n * @api\n */\nvar HAS = false;\n\n//TODO Remove side effects\nif (typeof window !== 'undefined' && 'WebGLRenderingContext' in window) {\n  try {\n    var canvas = /** @type {HTMLCanvasElement} */ (document.createElement('canvas'));\n    var gl = getContext(canvas, {failIfMajorPerformanceCaveat: true});\n    if (gl) {\n      HAS = true;\n      MAX_TEXTURE_SIZE = /** @type {number} */ (gl.getParameter(gl.MAX_TEXTURE_SIZE));\n      EXTENSIONS = gl.getSupportedExtensions();\n    }\n  } catch (e) {\n    // pass\n  }\n}\n\nexport {HAS, MAX_TEXTURE_SIZE, EXTENSIONS};\n\n//# sourceMappingURL=webgl.js.map","/**\n * @module ol/webgl/Shader\n */\nimport {abstract} from '../util.js';\n\n/**\n * @abstract\n */\nvar WebGLShader = function WebGLShader(source) {\n\n  /**\n   * @private\n   * @type {string}\n   */\n  this.source_ = source;\n\n};\n\n/**\n * @return {boolean} Is animated?\n */\nWebGLShader.prototype.isAnimated = function isAnimated () {\n  return false;\n};\n\n/**\n * @abstract\n * @return {number} Type.\n */\nWebGLShader.prototype.getType = function getType () {\n  return abstract();\n};\n\n/**\n * @return {string} Source.\n */\nWebGLShader.prototype.getSource = function getSource () {\n  return this.source_;\n};\n\n\nexport default WebGLShader;\n\n//# sourceMappingURL=Shader.js.map","/**\n * @module ol/webgl/Fragment\n */\n\nimport {FRAGMENT_SHADER} from '../webgl.js';\nimport WebGLShader from '../webgl/Shader.js';\n\nvar WebGLFragment = /*@__PURE__*/(function (WebGLShader) {\n  function WebGLFragment(source) {\n    WebGLShader.call(this, source);\n  }\n\n  if ( WebGLShader ) WebGLFragment.__proto__ = WebGLShader;\n  WebGLFragment.prototype = Object.create( WebGLShader && WebGLShader.prototype );\n  WebGLFragment.prototype.constructor = WebGLFragment;\n\n  /**\n   * @inheritDoc\n   */\n  WebGLFragment.prototype.getType = function getType () {\n    return FRAGMENT_SHADER;\n  };\n\n  return WebGLFragment;\n}(WebGLShader));\n\n\nexport default WebGLFragment;\n\n//# sourceMappingURL=Fragment.js.map","/**\n * @module ol/webgl/Vertex\n */\n\nimport {VERTEX_SHADER} from '../webgl.js';\nimport WebGLShader from '../webgl/Shader.js';\n\nvar WebGLVertex = /*@__PURE__*/(function (WebGLShader) {\n  function WebGLVertex(source) {\n    WebGLShader.call(this, source);\n  }\n\n  if ( WebGLShader ) WebGLVertex.__proto__ = WebGLShader;\n  WebGLVertex.prototype = Object.create( WebGLShader && WebGLShader.prototype );\n  WebGLVertex.prototype.constructor = WebGLVertex;\n\n  /**\n   * @inheritDoc\n   */\n  WebGLVertex.prototype.getType = function getType () {\n    return VERTEX_SHADER;\n  };\n\n  return WebGLVertex;\n}(WebGLShader));\n\n\nexport default WebGLVertex;\n\n//# sourceMappingURL=Vertex.js.map","/**\n * @module ol/render/webgl/circlereplay/defaultshader\n */\n// This file is automatically generated, do not edit.\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../webgl.js';\nimport WebGLFragment from '../../../webgl/Fragment.js';\nimport WebGLVertex from '../../../webgl/Vertex.js';\n\nexport var fragment = new WebGLFragment(DEBUG_WEBGL ?\n  'precision mediump float;\\nvarying vec2 v_center;\\nvarying vec2 v_offset;\\nvarying float v_halfWidth;\\nvarying float v_pixelRatio;\\n\\n\\n\\nuniform float u_opacity;\\nuniform vec4 u_fillColor;\\nuniform vec4 u_strokeColor;\\nuniform vec2 u_size;\\n\\nvoid main(void) {\\n  vec2 windowCenter = vec2((v_center.x + 1.0) / 2.0 * u_size.x * v_pixelRatio,\\n      (v_center.y + 1.0) / 2.0 * u_size.y * v_pixelRatio);\\n  vec2 windowOffset = vec2((v_offset.x + 1.0) / 2.0 * u_size.x * v_pixelRatio,\\n      (v_offset.y + 1.0) / 2.0 * u_size.y * v_pixelRatio);\\n  float radius = length(windowCenter - windowOffset);\\n  float dist = length(windowCenter - gl_FragCoord.xy);\\n  if (dist > radius + v_halfWidth) {\\n    if (u_strokeColor.a == 0.0) {\\n      gl_FragColor = u_fillColor;\\n    } else {\\n      gl_FragColor = u_strokeColor;\\n    }\\n    gl_FragColor.a = gl_FragColor.a - (dist - (radius + v_halfWidth));\\n  } else if (u_fillColor.a == 0.0) {\\n    // Hooray, no fill, just stroke. We can use real antialiasing.\\n    gl_FragColor = u_strokeColor;\\n    if (dist < radius - v_halfWidth) {\\n      gl_FragColor.a = gl_FragColor.a - (radius - v_halfWidth - dist);\\n    }\\n  } else {\\n    gl_FragColor = u_fillColor;\\n    float strokeDist = radius - v_halfWidth;\\n    float antialias = 2.0 * v_pixelRatio;\\n    if (dist > strokeDist) {\\n      gl_FragColor = u_strokeColor;\\n    } else if (dist >= strokeDist - antialias) {\\n      float step = smoothstep(strokeDist - antialias, strokeDist, dist);\\n      gl_FragColor = mix(u_fillColor, u_strokeColor, step);\\n    }\\n  }\\n  gl_FragColor.a = gl_FragColor.a * u_opacity;\\n  if (gl_FragColor.a <= 0.0) {\\n    discard;\\n  }\\n}\\n' :\n  'precision mediump float;varying vec2 a;varying vec2 b;varying float c;varying float d;uniform float m;uniform vec4 n;uniform vec4 o;uniform vec2 p;void main(void){vec2 windowCenter=vec2((a.x+1.0)/2.0*p.x*d,(a.y+1.0)/2.0*p.y*d);vec2 windowOffset=vec2((b.x+1.0)/2.0*p.x*d,(b.y+1.0)/2.0*p.y*d);float radius=length(windowCenter-windowOffset);float dist=length(windowCenter-gl_FragCoord.xy);if(dist>radius+c){if(o.a==0.0){gl_FragColor=n;}else{gl_FragColor=o;}gl_FragColor.a=gl_FragColor.a-(dist-(radius+c));}else if(n.a==0.0){gl_FragColor=o;if(dist<radius-c){gl_FragColor.a=gl_FragColor.a-(radius-c-dist);}} else{gl_FragColor=n;float strokeDist=radius-c;float antialias=2.0*d;if(dist>strokeDist){gl_FragColor=o;}else if(dist>=strokeDist-antialias){float step=smoothstep(strokeDist-antialias,strokeDist,dist);gl_FragColor=mix(n,o,step);}} gl_FragColor.a=gl_FragColor.a*m;if(gl_FragColor.a<=0.0){discard;}}');\n\nexport var vertex = new WebGLVertex(DEBUG_WEBGL ?\n  'varying vec2 v_center;\\nvarying vec2 v_offset;\\nvarying float v_halfWidth;\\nvarying float v_pixelRatio;\\n\\n\\nattribute vec2 a_position;\\nattribute float a_instruction;\\nattribute float a_radius;\\n\\nuniform mat4 u_projectionMatrix;\\nuniform mat4 u_offsetScaleMatrix;\\nuniform mat4 u_offsetRotateMatrix;\\nuniform float u_lineWidth;\\nuniform float u_pixelRatio;\\n\\nvoid main(void) {\\n  mat4 offsetMatrix = u_offsetScaleMatrix * u_offsetRotateMatrix;\\n  v_center = vec4(u_projectionMatrix * vec4(a_position, 0.0, 1.0)).xy;\\n  v_pixelRatio = u_pixelRatio;\\n  float lineWidth = u_lineWidth * u_pixelRatio;\\n  v_halfWidth = lineWidth / 2.0;\\n  if (lineWidth == 0.0) {\\n    lineWidth = 2.0 * u_pixelRatio;\\n  }\\n  vec2 offset;\\n  // Radius with anitaliasing (roughly).\\n  float radius = a_radius + 3.0 * u_pixelRatio;\\n  // Until we get gl_VertexID in WebGL, we store an instruction.\\n  if (a_instruction == 0.0) {\\n    // Offsetting the edges of the triangle by lineWidth / 2 is necessary, however\\n    // we should also leave some space for the antialiasing, thus we offset by lineWidth.\\n    offset = vec2(-1.0, 1.0);\\n  } else if (a_instruction == 1.0) {\\n    offset = vec2(-1.0, -1.0);\\n  } else if (a_instruction == 2.0) {\\n    offset = vec2(1.0, -1.0);\\n  } else {\\n    offset = vec2(1.0, 1.0);\\n  }\\n\\n  gl_Position = u_projectionMatrix * vec4(a_position + offset * radius, 0.0, 1.0) +\\n      offsetMatrix * vec4(offset * lineWidth, 0.0, 0.0);\\n  v_offset = vec4(u_projectionMatrix * vec4(a_position.x + a_radius, a_position.y,\\n      0.0, 1.0)).xy;\\n\\n  if (distance(v_center, v_offset) > 20000.0) {\\n    gl_Position = vec4(v_center, 0.0, 1.0);\\n  }\\n}\\n\\n\\n' :\n  'varying vec2 a;varying vec2 b;varying float c;varying float d;attribute vec2 e;attribute float f;attribute float g;uniform mat4 h;uniform mat4 i;uniform mat4 j;uniform float k;uniform float l;void main(void){mat4 offsetMatrix=i*j;a=vec4(h*vec4(e,0.0,1.0)).xy;d=l;float lineWidth=k*l;c=lineWidth/2.0;if(lineWidth==0.0){lineWidth=2.0*l;}vec2 offset;float radius=g+3.0*l;if(f==0.0){offset=vec2(-1.0,1.0);}else if(f==1.0){offset=vec2(-1.0,-1.0);}else if(f==2.0){offset=vec2(1.0,-1.0);}else{offset=vec2(1.0,1.0);}gl_Position=h*vec4(e+offset*radius,0.0,1.0)+offsetMatrix*vec4(offset*lineWidth,0.0,0.0);b=vec4(h*vec4(e.x+g,e.y,0.0,1.0)).xy;if(distance(a,b)>20000.0){gl_Position=vec4(a,0.0,1.0);}}');\n\n//# sourceMappingURL=defaultshader.js.map","/**\n * @module ol/render/webgl/circlereplay/defaultshader/Locations\n */\n// This file is automatically generated, do not edit\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../../webgl.js';\n\nvar Locations = function Locations(gl, program) {\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_projectionMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_projectionMatrix' : 'h');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_offsetScaleMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_offsetScaleMatrix' : 'i');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_offsetRotateMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_offsetRotateMatrix' : 'j');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_lineWidth = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_lineWidth' : 'k');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_pixelRatio = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_pixelRatio' : 'l');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_opacity = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_opacity' : 'm');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_fillColor = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_fillColor' : 'n');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_strokeColor = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_strokeColor' : 'o');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_size = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_size' : 'p');\n\n  /**\n   * @type {number}\n   */\n  this.a_position = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_position' : 'e');\n\n  /**\n   * @type {number}\n   */\n  this.a_instruction = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_instruction' : 'f');\n\n  /**\n   * @type {number}\n   */\n  this.a_radius = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_radius' : 'g');\n\n};\n\nexport default Locations;\n\n//# sourceMappingURL=Locations.js.map","/**\n * @module ol/vec/mat4\n */\n\n\n/**\n * @return {Array<number>} 4x4 matrix representing a 3D identity transform.\n */\nexport function create() {\n  return [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1];\n}\n\n\n/**\n * @param {Array<number>} mat4 Flattened 4x4 matrix receiving the result.\n * @param {import(\"../transform.js\").Transform} transform Transformation matrix.\n * @return {Array<number>} 2D transformation matrix as flattened 4x4 matrix.\n */\nexport function fromTransform(mat4, transform) {\n  mat4[0] = transform[0];\n  mat4[1] = transform[1];\n  mat4[4] = transform[2];\n  mat4[5] = transform[3];\n  mat4[12] = transform[4];\n  mat4[13] = transform[5];\n  return mat4;\n}\n\n//# sourceMappingURL=mat4.js.map","/**\n * @module ol/render/webgl/Replay\n */\nimport {abstract} from '../../util.js';\nimport {getCenter} from '../../extent.js';\nimport VectorContext from '../VectorContext.js';\nimport {\n  create as createTransform,\n  reset as resetTransform,\n  rotate as rotateTransform,\n  scale as scaleTransform,\n  translate as translateTransform\n} from '../../transform.js';\nimport {create, fromTransform} from '../../vec/mat4.js';\nimport {ARRAY_BUFFER, ELEMENT_ARRAY_BUFFER, TRIANGLES,\n  UNSIGNED_INT, UNSIGNED_SHORT} from '../../webgl.js';\n\nvar WebGLReplay = /*@__PURE__*/(function (VectorContext) {\n  function WebGLReplay(tolerance, maxExtent) {\n    VectorContext.call(this);\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.tolerance = tolerance;\n\n    /**\n     * @protected\n     * @const\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.maxExtent = maxExtent;\n\n    /**\n     * The origin of the coordinate system for the point coordinates sent to\n     * the GPU. To eliminate jitter caused by precision problems in the GPU\n     * we use the \"Rendering Relative to Eye\" technique described in the \"3D\n     * Engine Design for Virtual Globes\" book.\n     * @protected\n     * @type {import(\"../../coordinate.js\").Coordinate}\n     */\n    this.origin = getCenter(maxExtent);\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.projectionMatrix_ = createTransform();\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.offsetRotateMatrix_ = createTransform();\n\n    /**\n     * @private\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.offsetScaleMatrix_ = createTransform();\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.tmpMat4_ = create();\n\n    /**\n     * @protected\n     * @type {Array<number>}\n     */\n    this.indices = [];\n\n    /**\n     * @protected\n     * @type {?import(\"../../webgl/Buffer.js\").default}\n     */\n    this.indicesBuffer = null;\n\n    /**\n     * Start index per feature (the index).\n     * @protected\n     * @type {Array<number>}\n     */\n    this.startIndices = [];\n\n    /**\n     * Start index per feature (the feature).\n     * @protected\n     * @type {Array<import(\"../../Feature.js\").default|import(\"../Feature.js\").default>}\n     */\n    this.startIndicesFeature = [];\n\n    /**\n     * @protected\n     * @type {Array<number>}\n     */\n    this.vertices = [];\n\n    /**\n     * @protected\n     * @type {?import(\"../../webgl/Buffer.js\").default}\n     */\n    this.verticesBuffer = null;\n\n    /**\n     * Optional parameter for PolygonReplay instances.\n     * @protected\n     * @type {import(\"./LineStringReplay.js\").default|undefined}\n     */\n    this.lineStringReplay = undefined;\n\n  }\n\n  if ( VectorContext ) WebGLReplay.__proto__ = VectorContext;\n  WebGLReplay.prototype = Object.create( VectorContext && VectorContext.prototype );\n  WebGLReplay.prototype.constructor = WebGLReplay;\n\n  /**\n   * @abstract\n   * @param {import(\"../../webgl/Context.js\").default} context WebGL context.\n   * @return {function()} Delete resources function.\n   */\n  WebGLReplay.prototype.getDeleteResourcesFunction = function getDeleteResourcesFunction (context) {\n    return abstract();\n  };\n\n  /**\n   * @abstract\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   */\n  WebGLReplay.prototype.finish = function finish (context) {\n    abstract();\n  };\n\n  /**\n   * @abstract\n   * @protected\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {import(\"../../size.js\").Size} size Size.\n   * @param {number} pixelRatio Pixel ratio.\n   * @return {import(\"./circlereplay/defaultshader/Locations.js\").default|\n     import(\"./linestringreplay/defaultshader/Locations.js\").default|\n     import(\"./polygonreplay/defaultshader/Locations.js\").default|\n     import(\"./texturereplay/defaultshader/Locations.js\").default} Locations.\n   */\n  WebGLReplay.prototype.setUpProgram = function setUpProgram (gl, context, size, pixelRatio) {\n    return abstract();\n  };\n\n  /**\n   * @abstract\n   * @protected\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"./circlereplay/defaultshader/Locations.js\").default|\n     import(\"./linestringreplay/defaultshader/Locations.js\").default|\n     import(\"./polygonreplay/defaultshader/Locations.js\").default|\n     import(\"./texturereplay/defaultshader/Locations.js\").default} locations Locations.\n   */\n  WebGLReplay.prototype.shutDownProgram = function shutDownProgram (gl, locations) {\n    abstract();\n  };\n\n  /**\n   * @abstract\n   * @protected\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   * @param {boolean} hitDetection Hit detection mode.\n   */\n  WebGLReplay.prototype.drawReplay = function drawReplay (gl, context, skippedFeaturesHash, hitDetection) {\n    abstract();\n  };\n\n  /**\n   * @abstract\n   * @protected\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   * @param {function((import(\"../../Feature.js\").default|import(\"../Feature.js\").default)): T|undefined} featureCallback Feature callback.\n   * @param {import(\"../../extent.js\").Extent=} opt_hitExtent Hit extent: Only features intersecting this extent are checked.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  WebGLReplay.prototype.drawHitDetectionReplayOneByOne = function drawHitDetectionReplayOneByOne (gl, context, skippedFeaturesHash, featureCallback, opt_hitExtent) {\n    return abstract();\n  };\n\n  /**\n   * @protected\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   * @param {function((import(\"../../Feature.js\").default|import(\"../Feature.js\").default)): T|undefined} featureCallback Feature callback.\n   * @param {boolean} oneByOne Draw features one-by-one for the hit-detecion.\n   * @param {import(\"../../extent.js\").Extent=} opt_hitExtent Hit extent: Only features intersecting this extent are checked.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  WebGLReplay.prototype.drawHitDetectionReplay = function drawHitDetectionReplay (gl, context, skippedFeaturesHash, featureCallback, oneByOne, opt_hitExtent) {\n    if (!oneByOne) {\n      // draw all hit-detection features in \"once\" (by texture group)\n      return this.drawHitDetectionReplayAll(gl, context,\n        skippedFeaturesHash, featureCallback);\n    } else {\n      // draw hit-detection features one by one\n      return this.drawHitDetectionReplayOneByOne(gl, context,\n        skippedFeaturesHash, featureCallback, opt_hitExtent);\n    }\n  };\n\n  /**\n   * @protected\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   * @param {function((import(\"../../Feature.js\").default|import(\"../Feature.js\").default)): T|undefined} featureCallback Feature callback.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  WebGLReplay.prototype.drawHitDetectionReplayAll = function drawHitDetectionReplayAll (gl, context, skippedFeaturesHash, featureCallback) {\n    gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);\n    this.drawReplay(gl, context, skippedFeaturesHash, true);\n\n    var result = featureCallback(null);\n    if (result) {\n      return result;\n    } else {\n      return undefined;\n    }\n  };\n\n  /**\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {import(\"../../coordinate.js\").Coordinate} center Center.\n   * @param {number} resolution Resolution.\n   * @param {number} rotation Rotation.\n   * @param {import(\"../../size.js\").Size} size Size.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {number} opacity Global opacity.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   * @param {function((import(\"../../Feature.js\").default|import(\"../Feature.js\").default)): T|undefined} featureCallback Feature callback.\n   * @param {boolean} oneByOne Draw features one-by-one for the hit-detecion.\n   * @param {import(\"../../extent.js\").Extent=} opt_hitExtent Hit extent: Only features intersecting this extent are checked.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  WebGLReplay.prototype.replay = function replay (\n    context,\n    center,\n    resolution,\n    rotation,\n    size,\n    pixelRatio,\n    opacity,\n    skippedFeaturesHash,\n    featureCallback,\n    oneByOne,\n    opt_hitExtent\n  ) {\n    var gl = context.getGL();\n    var tmpStencil, tmpStencilFunc, tmpStencilMaskVal, tmpStencilRef, tmpStencilMask,\n        tmpStencilOpFail, tmpStencilOpPass, tmpStencilOpZFail;\n\n    if (this.lineStringReplay) {\n      tmpStencil = gl.isEnabled(gl.STENCIL_TEST);\n      tmpStencilFunc = gl.getParameter(gl.STENCIL_FUNC);\n      tmpStencilMaskVal = gl.getParameter(gl.STENCIL_VALUE_MASK);\n      tmpStencilRef = gl.getParameter(gl.STENCIL_REF);\n      tmpStencilMask = gl.getParameter(gl.STENCIL_WRITEMASK);\n      tmpStencilOpFail = gl.getParameter(gl.STENCIL_FAIL);\n      tmpStencilOpPass = gl.getParameter(gl.STENCIL_PASS_DEPTH_PASS);\n      tmpStencilOpZFail = gl.getParameter(gl.STENCIL_PASS_DEPTH_FAIL);\n\n      gl.enable(gl.STENCIL_TEST);\n      gl.clear(gl.STENCIL_BUFFER_BIT);\n      gl.stencilMask(255);\n      gl.stencilFunc(gl.ALWAYS, 1, 255);\n      gl.stencilOp(gl.KEEP, gl.KEEP, gl.REPLACE);\n\n      this.lineStringReplay.replay(context,\n        center, resolution, rotation, size, pixelRatio,\n        opacity, skippedFeaturesHash,\n        featureCallback, oneByOne, opt_hitExtent);\n\n      gl.stencilMask(0);\n      gl.stencilFunc(gl.NOTEQUAL, 1, 255);\n    }\n\n    context.bindBuffer(ARRAY_BUFFER, this.verticesBuffer);\n\n    context.bindBuffer(ELEMENT_ARRAY_BUFFER, this.indicesBuffer);\n\n    var locations = this.setUpProgram(gl, context, size, pixelRatio);\n\n    // set the \"uniform\" values\n    var projectionMatrix = resetTransform(this.projectionMatrix_);\n    scaleTransform(projectionMatrix, 2 / (resolution * size[0]), 2 / (resolution * size[1]));\n    rotateTransform(projectionMatrix, -rotation);\n    translateTransform(projectionMatrix, -(center[0] - this.origin[0]), -(center[1] - this.origin[1]));\n\n    var offsetScaleMatrix = resetTransform(this.offsetScaleMatrix_);\n    scaleTransform(offsetScaleMatrix, 2 / size[0], 2 / size[1]);\n\n    var offsetRotateMatrix = resetTransform(this.offsetRotateMatrix_);\n    if (rotation !== 0) {\n      rotateTransform(offsetRotateMatrix, -rotation);\n    }\n\n    gl.uniformMatrix4fv(locations.u_projectionMatrix, false,\n      fromTransform(this.tmpMat4_, projectionMatrix));\n    gl.uniformMatrix4fv(locations.u_offsetScaleMatrix, false,\n      fromTransform(this.tmpMat4_, offsetScaleMatrix));\n    gl.uniformMatrix4fv(locations.u_offsetRotateMatrix, false,\n      fromTransform(this.tmpMat4_, offsetRotateMatrix));\n    gl.uniform1f(locations.u_opacity, opacity);\n\n    // draw!\n    var result;\n    if (featureCallback === undefined) {\n      this.drawReplay(gl, context, skippedFeaturesHash, false);\n    } else {\n      // draw feature by feature for the hit-detection\n      result = this.drawHitDetectionReplay(gl, context, skippedFeaturesHash,\n        featureCallback, oneByOne, opt_hitExtent);\n    }\n\n    // disable the vertex attrib arrays\n    this.shutDownProgram(gl, locations);\n\n    if (this.lineStringReplay) {\n      if (!tmpStencil) {\n        gl.disable(gl.STENCIL_TEST);\n      }\n      gl.clear(gl.STENCIL_BUFFER_BIT);\n      gl.stencilFunc(/** @type {number} */ (tmpStencilFunc),\n        /** @type {number} */ (tmpStencilRef), /** @type {number} */ (tmpStencilMaskVal));\n      gl.stencilMask(/** @type {number} */ (tmpStencilMask));\n      gl.stencilOp(/** @type {number} */ (tmpStencilOpFail),\n        /** @type {number} */ (tmpStencilOpZFail), /** @type {number} */ (tmpStencilOpPass));\n    }\n\n    return result;\n  };\n\n  /**\n   * @protected\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {number} start Start index.\n   * @param {number} end End index.\n   */\n  WebGLReplay.prototype.drawElements = function drawElements (gl, context, start, end) {\n    var elementType = context.hasOESElementIndexUint ?\n      UNSIGNED_INT : UNSIGNED_SHORT;\n    var elementSize = context.hasOESElementIndexUint ? 4 : 2;\n\n    var numItems = end - start;\n    var offsetInBytes = start * elementSize;\n    gl.drawElements(TRIANGLES, numItems, elementType, offsetInBytes);\n  };\n\n  return WebGLReplay;\n}(VectorContext));\n\n\nexport default WebGLReplay;\n\n//# sourceMappingURL=Replay.js.map","/**\n * @module ol/render/webgl\n */\n\n\n/**\n * @const\n * @type {string}\n */\nexport var DEFAULT_FONT = '10px sans-serif';\n\n\n/**\n * @const\n * @type {import(\"../color.js\").Color}\n */\nexport var DEFAULT_FILLSTYLE = [0.0, 0.0, 0.0, 1.0];\n\n\n/**\n * @const\n * @type {string}\n */\nexport var DEFAULT_LINECAP = 'round';\n\n\n/**\n * @const\n * @type {Array<number>}\n */\nexport var DEFAULT_LINEDASH = [];\n\n\n/**\n * @const\n * @type {number}\n */\nexport var DEFAULT_LINEDASHOFFSET = 0;\n\n\n/**\n * @const\n * @type {string}\n */\nexport var DEFAULT_LINEJOIN = 'round';\n\n\n/**\n * @const\n * @type {number}\n */\nexport var DEFAULT_MITERLIMIT = 10;\n\n/**\n * @const\n * @type {import(\"../color.js\").Color}\n */\nexport var DEFAULT_STROKESTYLE = [0.0, 0.0, 0.0, 1.0];\n\n\n/**\n * @const\n * @type {number}\n */\nexport var DEFAULT_TEXTALIGN = 0.5;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var DEFAULT_TEXTBASELINE = 0.5;\n\n\n/**\n * @const\n * @type {number}\n */\nexport var DEFAULT_LINEWIDTH = 1;\n\n/**\n * @const\n * @type {number}\n */\nexport var EPSILON = Number.EPSILON || 2.220446049250313e-16;\n\n/**\n * Calculates the orientation of a triangle based on the determinant method.\n * @param {number} x1 First X coordinate.\n * @param {number} y1 First Y coordinate.\n * @param {number} x2 Second X coordinate.\n * @param {number} y2 Second Y coordinate.\n * @param {number} x3 Third X coordinate.\n * @param {number} y3 Third Y coordinate.\n * @return {boolean|undefined} Triangle is clockwise.\n */\nexport var triangleIsCounterClockwise = function(x1, y1, x2, y2, x3, y3) {\n  var area = (x2 - x1) * (y3 - y1) - (x3 - x1) * (y2 - y1);\n  return (area <= EPSILON && area >= -EPSILON) ?\n    undefined : area > 0;\n};\n\n\n//# sourceMappingURL=webgl.js.map","/**\n * @module ol/webgl/Buffer\n */\nimport {STATIC_DRAW, STREAM_DRAW, DYNAMIC_DRAW} from '../webgl.js';\n\n/**\n * @enum {number}\n */\nvar BufferUsage = {\n  STATIC_DRAW: STATIC_DRAW,\n  STREAM_DRAW: STREAM_DRAW,\n  DYNAMIC_DRAW: DYNAMIC_DRAW\n};\n\n\nvar WebGLBuffer = function WebGLBuffer(opt_arr, opt_usage) {\n\n  /**\n   * @private\n   * @type {Array<number>}\n   */\n  this.arr_ = opt_arr !== undefined ? opt_arr : [];\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.usage_ = opt_usage !== undefined ? opt_usage : BufferUsage.STATIC_DRAW;\n\n};\n\n/**\n * @return {Array<number>} Array.\n */\nWebGLBuffer.prototype.getArray = function getArray () {\n  return this.arr_;\n};\n\n/**\n * @return {number} Usage.\n */\nWebGLBuffer.prototype.getUsage = function getUsage () {\n  return this.usage_;\n};\n\nexport default WebGLBuffer;\n\n//# sourceMappingURL=Buffer.js.map","/**\n * @module ol/render/webgl/CircleReplay\n */\nimport {getUid} from '../../util.js';\nimport {equals} from '../../array.js';\nimport {asArray} from '../../color.js';\nimport {intersects} from '../../extent.js';\nimport {isEmpty} from '../../obj.js';\nimport {translate} from '../../geom/flat/transform.js';\nimport {fragment, vertex} from './circlereplay/defaultshader.js';\nimport Locations from './circlereplay/defaultshader/Locations.js';\nimport WebGLReplay from './Replay.js';\nimport {DEFAULT_LINEDASH, DEFAULT_LINEDASHOFFSET, DEFAULT_STROKESTYLE,\n  DEFAULT_FILLSTYLE, DEFAULT_LINEWIDTH} from '../webgl.js';\nimport {FLOAT} from '../../webgl.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\n\nvar WebGLCircleReplay = /*@__PURE__*/(function (WebGLReplay) {\n  function WebGLCircleReplay(tolerance, maxExtent) {\n    WebGLReplay.call(this, tolerance, maxExtent);\n\n    /**\n     * @private\n     * @type {import(\"./circlereplay/defaultshader/Locations.js\").default}\n     */\n    this.defaultLocations_ = null;\n\n    /**\n     * @private\n     * @type {Array<Array<Array<number>|number>>}\n     */\n    this.styles_ = [];\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.styleIndices_ = [];\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.radius_ = 0;\n\n    /**\n     * @private\n     * @type {{fillColor: (Array<number>|null),\n     *         strokeColor: (Array<number>|null),\n     *         lineDash: Array<number>,\n     *         lineDashOffset: (number|undefined),\n     *         lineWidth: (number|undefined),\n     *         changed: boolean}|null}\n     */\n    this.state_ = {\n      fillColor: null,\n      strokeColor: null,\n      lineDash: null,\n      lineDashOffset: undefined,\n      lineWidth: undefined,\n      changed: false\n    };\n\n  }\n\n  if ( WebGLReplay ) WebGLCircleReplay.__proto__ = WebGLReplay;\n  WebGLCircleReplay.prototype = Object.create( WebGLReplay && WebGLReplay.prototype );\n  WebGLCircleReplay.prototype.constructor = WebGLCircleReplay;\n\n  /**\n   * @private\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   */\n  WebGLCircleReplay.prototype.drawCoordinates_ = function drawCoordinates_ (flatCoordinates, offset, end, stride) {\n    var numVertices = this.vertices.length;\n    var numIndices = this.indices.length;\n    var n = numVertices / 4;\n    var i, ii;\n    for (i = offset, ii = end; i < ii; i += stride) {\n      this.vertices[numVertices++] = flatCoordinates[i];\n      this.vertices[numVertices++] = flatCoordinates[i + 1];\n      this.vertices[numVertices++] = 0;\n      this.vertices[numVertices++] = this.radius_;\n\n      this.vertices[numVertices++] = flatCoordinates[i];\n      this.vertices[numVertices++] = flatCoordinates[i + 1];\n      this.vertices[numVertices++] = 1;\n      this.vertices[numVertices++] = this.radius_;\n\n      this.vertices[numVertices++] = flatCoordinates[i];\n      this.vertices[numVertices++] = flatCoordinates[i + 1];\n      this.vertices[numVertices++] = 2;\n      this.vertices[numVertices++] = this.radius_;\n\n      this.vertices[numVertices++] = flatCoordinates[i];\n      this.vertices[numVertices++] = flatCoordinates[i + 1];\n      this.vertices[numVertices++] = 3;\n      this.vertices[numVertices++] = this.radius_;\n\n      this.indices[numIndices++] = n;\n      this.indices[numIndices++] = n + 1;\n      this.indices[numIndices++] = n + 2;\n\n      this.indices[numIndices++] = n + 2;\n      this.indices[numIndices++] = n + 3;\n      this.indices[numIndices++] = n;\n\n      n += 4;\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLCircleReplay.prototype.drawCircle = function drawCircle (circleGeometry, feature) {\n    var radius = circleGeometry.getRadius();\n    var stride = circleGeometry.getStride();\n    if (radius) {\n      this.startIndices.push(this.indices.length);\n      this.startIndicesFeature.push(feature);\n      if (this.state_.changed) {\n        this.styleIndices_.push(this.indices.length);\n        this.state_.changed = false;\n      }\n\n      this.radius_ = radius;\n      var flatCoordinates = circleGeometry.getFlatCoordinates();\n      flatCoordinates = translate(flatCoordinates, 0, 2,\n        stride, -this.origin[0], -this.origin[1]);\n      this.drawCoordinates_(flatCoordinates, 0, 2, stride);\n    } else {\n      if (this.state_.changed) {\n        this.styles_.pop();\n        if (this.styles_.length) {\n          var lastState = this.styles_[this.styles_.length - 1];\n          this.state_.fillColor = /** @type {Array<number>} */ (lastState[0]);\n          this.state_.strokeColor = /** @type {Array<number>} */ (lastState[1]);\n          this.state_.lineWidth = /** @type {number} */ (lastState[2]);\n          this.state_.changed = false;\n        }\n      }\n    }\n  };\n\n  /**\n   * @inheritDoc\n   **/\n  WebGLCircleReplay.prototype.finish = function finish (context) {\n    // create, bind, and populate the vertices buffer\n    this.verticesBuffer = new WebGLBuffer(this.vertices);\n\n    // create, bind, and populate the indices buffer\n    this.indicesBuffer = new WebGLBuffer(this.indices);\n\n    this.startIndices.push(this.indices.length);\n\n    //Clean up, if there is nothing to draw\n    if (this.styleIndices_.length === 0 && this.styles_.length > 0) {\n      this.styles_ = [];\n    }\n\n    this.vertices = null;\n    this.indices = null;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLCircleReplay.prototype.getDeleteResourcesFunction = function getDeleteResourcesFunction (context) {\n    // We only delete our stuff here. The shaders and the program may\n    // be used by other CircleReplay instances (for other layers). And\n    // they will be deleted when disposing of the import(\"../../webgl/Context.js\").WebGLContext\n    // object.\n    var verticesBuffer = this.verticesBuffer;\n    var indicesBuffer = this.indicesBuffer;\n    return function() {\n      context.deleteBuffer(verticesBuffer);\n      context.deleteBuffer(indicesBuffer);\n    };\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLCircleReplay.prototype.setUpProgram = function setUpProgram (gl, context, size, pixelRatio) {\n    // get the program\n    var program = context.getProgram(fragment, vertex);\n\n    // get the locations\n    var locations;\n    if (!this.defaultLocations_) {\n      locations = new Locations(gl, program);\n      this.defaultLocations_ = locations;\n    } else {\n      locations = this.defaultLocations_;\n    }\n\n    context.useProgram(program);\n\n    // enable the vertex attrib arrays\n    gl.enableVertexAttribArray(locations.a_position);\n    gl.vertexAttribPointer(locations.a_position, 2, FLOAT,\n      false, 16, 0);\n\n    gl.enableVertexAttribArray(locations.a_instruction);\n    gl.vertexAttribPointer(locations.a_instruction, 1, FLOAT,\n      false, 16, 8);\n\n    gl.enableVertexAttribArray(locations.a_radius);\n    gl.vertexAttribPointer(locations.a_radius, 1, FLOAT,\n      false, 16, 12);\n\n    // Enable renderer specific uniforms.\n    gl.uniform2fv(locations.u_size, size);\n    gl.uniform1f(locations.u_pixelRatio, pixelRatio);\n\n    return locations;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLCircleReplay.prototype.shutDownProgram = function shutDownProgram (gl, locations) {\n    gl.disableVertexAttribArray(locations.a_position);\n    gl.disableVertexAttribArray(locations.a_instruction);\n    gl.disableVertexAttribArray(locations.a_radius);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLCircleReplay.prototype.drawReplay = function drawReplay (gl, context, skippedFeaturesHash, hitDetection) {\n    if (!isEmpty(skippedFeaturesHash)) {\n      this.drawReplaySkipping_(gl, context, skippedFeaturesHash);\n    } else {\n      //Draw by style groups to minimize drawElements() calls.\n      var i, start, end, nextStyle;\n      end = this.startIndices[this.startIndices.length - 1];\n      for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n        start = this.styleIndices_[i];\n        nextStyle = this.styles_[i];\n        this.setFillStyle_(gl, /** @type {Array<number>} */ (nextStyle[0]));\n        this.setStrokeStyle_(gl, /** @type {Array<number>} */ (nextStyle[1]),\n          /** @type {number} */ (nextStyle[2]));\n        this.drawElements(gl, context, start, end);\n        end = start;\n      }\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLCircleReplay.prototype.drawHitDetectionReplayOneByOne = function drawHitDetectionReplayOneByOne (gl, context, skippedFeaturesHash, featureCallback, opt_hitExtent) {\n    var i, start, end, nextStyle, groupStart, feature, featureIndex;\n    featureIndex = this.startIndices.length - 2;\n    end = this.startIndices[featureIndex + 1];\n    for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n      nextStyle = this.styles_[i];\n      this.setFillStyle_(gl, /** @type {Array<number>} */ (nextStyle[0]));\n      this.setStrokeStyle_(gl, /** @type {Array<number>} */ (nextStyle[1]),\n        /** @type {number} */ (nextStyle[2]));\n      groupStart = this.styleIndices_[i];\n\n      while (featureIndex >= 0 &&\n          this.startIndices[featureIndex] >= groupStart) {\n        start = this.startIndices[featureIndex];\n        feature = this.startIndicesFeature[featureIndex];\n\n        if (skippedFeaturesHash[getUid(feature)] === undefined &&\n            feature.getGeometry() &&\n            (opt_hitExtent === undefined || intersects(\n              /** @type {Array<number>} */ (opt_hitExtent),\n              feature.getGeometry().getExtent()))) {\n          gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);\n          this.drawElements(gl, context, start, end);\n\n          var result = featureCallback(feature);\n\n          if (result) {\n            return result;\n          }\n\n        }\n        featureIndex--;\n        end = start;\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * @private\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {Object} skippedFeaturesHash Ids of features to skip.\n   */\n  WebGLCircleReplay.prototype.drawReplaySkipping_ = function drawReplaySkipping_ (gl, context, skippedFeaturesHash) {\n    var i, start, end, nextStyle, groupStart, feature, featureIndex, featureStart;\n    featureIndex = this.startIndices.length - 2;\n    end = start = this.startIndices[featureIndex + 1];\n    for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n      nextStyle = this.styles_[i];\n      this.setFillStyle_(gl, /** @type {Array<number>} */ (nextStyle[0]));\n      this.setStrokeStyle_(gl, /** @type {Array<number>} */ (nextStyle[1]),\n        /** @type {number} */ (nextStyle[2]));\n      groupStart = this.styleIndices_[i];\n\n      while (featureIndex >= 0 &&\n          this.startIndices[featureIndex] >= groupStart) {\n        featureStart = this.startIndices[featureIndex];\n        feature = this.startIndicesFeature[featureIndex];\n\n        if (skippedFeaturesHash[getUid(feature)]) {\n          if (start !== end) {\n            this.drawElements(gl, context, start, end);\n          }\n          end = featureStart;\n        }\n        featureIndex--;\n        start = featureStart;\n      }\n      if (start !== end) {\n        this.drawElements(gl, context, start, end);\n      }\n      start = end = groupStart;\n    }\n  };\n\n  /**\n   * @private\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {Array<number>} color Color.\n   */\n  WebGLCircleReplay.prototype.setFillStyle_ = function setFillStyle_ (gl, color) {\n    gl.uniform4fv(this.defaultLocations_.u_fillColor, color);\n  };\n\n  /**\n   * @private\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {Array<number>} color Color.\n   * @param {number} lineWidth Line width.\n   */\n  WebGLCircleReplay.prototype.setStrokeStyle_ = function setStrokeStyle_ (gl, color, lineWidth) {\n    gl.uniform4fv(this.defaultLocations_.u_strokeColor, color);\n    gl.uniform1f(this.defaultLocations_.u_lineWidth, lineWidth);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLCircleReplay.prototype.setFillStrokeStyle = function setFillStrokeStyle (fillStyle, strokeStyle) {\n    var strokeStyleColor, strokeStyleWidth;\n    if (strokeStyle) {\n      var strokeStyleLineDash = strokeStyle.getLineDash();\n      this.state_.lineDash = strokeStyleLineDash ?\n        strokeStyleLineDash : DEFAULT_LINEDASH;\n      var strokeStyleLineDashOffset = strokeStyle.getLineDashOffset();\n      this.state_.lineDashOffset = strokeStyleLineDashOffset ?\n        strokeStyleLineDashOffset : DEFAULT_LINEDASHOFFSET;\n      strokeStyleColor = strokeStyle.getColor();\n      if (!(strokeStyleColor instanceof CanvasGradient) &&\n          !(strokeStyleColor instanceof CanvasPattern)) {\n        strokeStyleColor = asArray(strokeStyleColor).map(function(c, i) {\n          return i != 3 ? c / 255 : c;\n        }) || DEFAULT_STROKESTYLE;\n      } else {\n        strokeStyleColor = DEFAULT_STROKESTYLE;\n      }\n      strokeStyleWidth = strokeStyle.getWidth();\n      strokeStyleWidth = strokeStyleWidth !== undefined ?\n        strokeStyleWidth : DEFAULT_LINEWIDTH;\n    } else {\n      strokeStyleColor = [0, 0, 0, 0];\n      strokeStyleWidth = 0;\n    }\n    var fillStyleColor = fillStyle ? fillStyle.getColor() : [0, 0, 0, 0];\n    if (!(fillStyleColor instanceof CanvasGradient) &&\n        !(fillStyleColor instanceof CanvasPattern)) {\n      fillStyleColor = asArray(fillStyleColor).map(function(c, i) {\n        return i != 3 ? c / 255 : c;\n      }) || DEFAULT_FILLSTYLE;\n    } else {\n      fillStyleColor = DEFAULT_FILLSTYLE;\n    }\n    if (!this.state_.strokeColor || !equals(this.state_.strokeColor, strokeStyleColor) ||\n        !this.state_.fillColor || !equals(this.state_.fillColor, fillStyleColor) ||\n        this.state_.lineWidth !== strokeStyleWidth) {\n      this.state_.changed = true;\n      this.state_.fillColor = fillStyleColor;\n      this.state_.strokeColor = strokeStyleColor;\n      this.state_.lineWidth = strokeStyleWidth;\n      this.styles_.push([fillStyleColor, strokeStyleColor, strokeStyleWidth]);\n    }\n  };\n\n  return WebGLCircleReplay;\n}(WebGLReplay));\n\n\nexport default WebGLCircleReplay;\n\n//# sourceMappingURL=CircleReplay.js.map","/**\n * @module ol/render/webgl/texturereplay/defaultshader\n */\n// This file is automatically generated, do not edit.\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../webgl.js';\nimport WebGLFragment from '../../../webgl/Fragment.js';\nimport WebGLVertex from '../../../webgl/Vertex.js';\n\nexport var fragment = new WebGLFragment(DEBUG_WEBGL ?\n  'precision mediump float;\\nvarying vec2 v_texCoord;\\nvarying float v_opacity;\\n\\nuniform float u_opacity;\\nuniform sampler2D u_image;\\n\\nvoid main(void) {\\n  vec4 texColor = texture2D(u_image, v_texCoord);\\n  gl_FragColor.rgb = texColor.rgb;\\n  float alpha = texColor.a * v_opacity * u_opacity;\\n  if (alpha == 0.0) {\\n    discard;\\n  }\\n  gl_FragColor.a = alpha;\\n}\\n' :\n  'precision mediump float;varying vec2 a;varying float b;uniform float k;uniform sampler2D l;void main(void){vec4 texColor=texture2D(l,a);gl_FragColor.rgb=texColor.rgb;float alpha=texColor.a*b*k;if(alpha==0.0){discard;}gl_FragColor.a=alpha;}');\n\nexport var vertex = new WebGLVertex(DEBUG_WEBGL ?\n  'varying vec2 v_texCoord;\\nvarying float v_opacity;\\n\\nattribute vec2 a_position;\\nattribute vec2 a_texCoord;\\nattribute vec2 a_offsets;\\nattribute float a_opacity;\\nattribute float a_rotateWithView;\\n\\nuniform mat4 u_projectionMatrix;\\nuniform mat4 u_offsetScaleMatrix;\\nuniform mat4 u_offsetRotateMatrix;\\n\\nvoid main(void) {\\n  mat4 offsetMatrix = u_offsetScaleMatrix;\\n  if (a_rotateWithView == 1.0) {\\n    offsetMatrix = u_offsetScaleMatrix * u_offsetRotateMatrix;\\n  }\\n  vec4 offsets = offsetMatrix * vec4(a_offsets, 0.0, 0.0);\\n  gl_Position = u_projectionMatrix * vec4(a_position, 0.0, 1.0) + offsets;\\n  v_texCoord = a_texCoord;\\n  v_opacity = a_opacity;\\n}\\n\\n\\n' :\n  'varying vec2 a;varying float b;attribute vec2 c;attribute vec2 d;attribute vec2 e;attribute float f;attribute float g;uniform mat4 h;uniform mat4 i;uniform mat4 j;void main(void){mat4 offsetMatrix=i;if(g==1.0){offsetMatrix=i*j;}vec4 offsets=offsetMatrix*vec4(e,0.0,0.0);gl_Position=h*vec4(c,0.0,1.0)+offsets;a=d;b=f;}');\n\n//# sourceMappingURL=defaultshader.js.map","/**\n * @module ol/render/webgl/texturereplay/defaultshader/Locations\n */\n// This file is automatically generated, do not edit\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../../webgl.js';\n\nvar Locations = function Locations(gl, program) {\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_projectionMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_projectionMatrix' : 'h');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_offsetScaleMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_offsetScaleMatrix' : 'i');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_offsetRotateMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_offsetRotateMatrix' : 'j');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_opacity = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_opacity' : 'k');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_image = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_image' : 'l');\n\n  /**\n   * @type {number}\n   */\n  this.a_position = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_position' : 'c');\n\n  /**\n   * @type {number}\n   */\n  this.a_texCoord = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_texCoord' : 'd');\n\n  /**\n   * @type {number}\n   */\n  this.a_offsets = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_offsets' : 'e');\n\n  /**\n   * @type {number}\n   */\n  this.a_opacity = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_opacity' : 'f');\n\n  /**\n   * @type {number}\n   */\n  this.a_rotateWithView = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_rotateWithView' : 'g');\n\n};\n\nexport default Locations;\n\n//# sourceMappingURL=Locations.js.map","/**\n * @module ol/webgl/ContextEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  LOST: 'webglcontextlost',\n  RESTORED: 'webglcontextrestored'\n};\n\n//# sourceMappingURL=ContextEventType.js.map","/**\n * @module ol/webgl/Context\n */\nimport {getUid} from '../util.js';\nimport {EXTENSIONS as WEBGL_EXTENSIONS} from '../webgl.js';\nimport Disposable from '../Disposable.js';\nimport {includes} from '../array.js';\nimport {listen, unlistenAll} from '../events.js';\nimport {clear} from '../obj.js';\nimport {ARRAY_BUFFER, ELEMENT_ARRAY_BUFFER, TEXTURE_2D, TEXTURE_WRAP_S, TEXTURE_WRAP_T} from '../webgl.js';\nimport ContextEventType from '../webgl/ContextEventType.js';\n\n\n/**\n * @typedef {Object} BufferCacheEntry\n * @property {import(\"./Buffer.js\").default} buf\n * @property {WebGLBuffer} buffer\n */\n\n\n/**\n * @classdesc\n * A WebGL context for accessing low-level WebGL capabilities.\n */\nvar WebGLContext = /*@__PURE__*/(function (Disposable) {\n  function WebGLContext(canvas, gl) {\n    Disposable.call(this);\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.canvas_ = canvas;\n\n    /**\n     * @private\n     * @type {WebGLRenderingContext}\n     */\n    this.gl_ = gl;\n\n    /**\n     * @private\n     * @type {!Object<string, BufferCacheEntry>}\n     */\n    this.bufferCache_ = {};\n\n    /**\n     * @private\n     * @type {!Object<string, WebGLShader>}\n     */\n    this.shaderCache_ = {};\n\n    /**\n     * @private\n     * @type {!Object<string, WebGLProgram>}\n     */\n    this.programCache_ = {};\n\n    /**\n     * @private\n     * @type {WebGLProgram}\n     */\n    this.currentProgram_ = null;\n\n    /**\n     * @private\n     * @type {WebGLFramebuffer}\n     */\n    this.hitDetectionFramebuffer_ = null;\n\n    /**\n     * @private\n     * @type {WebGLTexture}\n     */\n    this.hitDetectionTexture_ = null;\n\n    /**\n     * @private\n     * @type {WebGLRenderbuffer}\n     */\n    this.hitDetectionRenderbuffer_ = null;\n\n    /**\n     * @type {boolean}\n     */\n    this.hasOESElementIndexUint = includes(WEBGL_EXTENSIONS, 'OES_element_index_uint');\n\n    // use the OES_element_index_uint extension if available\n    if (this.hasOESElementIndexUint) {\n      gl.getExtension('OES_element_index_uint');\n    }\n\n    listen(this.canvas_, ContextEventType.LOST,\n      this.handleWebGLContextLost, this);\n    listen(this.canvas_, ContextEventType.RESTORED,\n      this.handleWebGLContextRestored, this);\n\n  }\n\n  if ( Disposable ) WebGLContext.__proto__ = Disposable;\n  WebGLContext.prototype = Object.create( Disposable && Disposable.prototype );\n  WebGLContext.prototype.constructor = WebGLContext;\n\n  /**\n   * Just bind the buffer if it's in the cache. Otherwise create\n   * the WebGL buffer, bind it, populate it, and add an entry to\n   * the cache.\n   * @param {number} target Target.\n   * @param {import(\"./Buffer.js\").default} buf Buffer.\n   */\n  WebGLContext.prototype.bindBuffer = function bindBuffer (target, buf) {\n    var gl = this.getGL();\n    var arr = buf.getArray();\n    var bufferKey = getUid(buf);\n    if (bufferKey in this.bufferCache_) {\n      var bufferCacheEntry = this.bufferCache_[bufferKey];\n      gl.bindBuffer(target, bufferCacheEntry.buffer);\n    } else {\n      var buffer = gl.createBuffer();\n      gl.bindBuffer(target, buffer);\n      var /** @type {ArrayBufferView} */ arrayBuffer;\n      if (target == ARRAY_BUFFER) {\n        arrayBuffer = new Float32Array(arr);\n      } else if (target == ELEMENT_ARRAY_BUFFER) {\n        arrayBuffer = this.hasOESElementIndexUint ?\n          new Uint32Array(arr) : new Uint16Array(arr);\n      }\n      gl.bufferData(target, arrayBuffer, buf.getUsage());\n      this.bufferCache_[bufferKey] = {\n        buf: buf,\n        buffer: buffer\n      };\n    }\n  };\n\n  /**\n   * @param {import(\"./Buffer.js\").default} buf Buffer.\n   */\n  WebGLContext.prototype.deleteBuffer = function deleteBuffer (buf) {\n    var gl = this.getGL();\n    var bufferKey = getUid(buf);\n    var bufferCacheEntry = this.bufferCache_[bufferKey];\n    if (!gl.isContextLost()) {\n      gl.deleteBuffer(bufferCacheEntry.buffer);\n    }\n    delete this.bufferCache_[bufferKey];\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLContext.prototype.disposeInternal = function disposeInternal () {\n    unlistenAll(this.canvas_);\n    var gl = this.getGL();\n    if (!gl.isContextLost()) {\n      for (var key in this.bufferCache_) {\n        gl.deleteBuffer(this.bufferCache_[key].buffer);\n      }\n      for (var key$1 in this.programCache_) {\n        gl.deleteProgram(this.programCache_[key$1]);\n      }\n      for (var key$2 in this.shaderCache_) {\n        gl.deleteShader(this.shaderCache_[key$2]);\n      }\n      // delete objects for hit-detection\n      gl.deleteFramebuffer(this.hitDetectionFramebuffer_);\n      gl.deleteRenderbuffer(this.hitDetectionRenderbuffer_);\n      gl.deleteTexture(this.hitDetectionTexture_);\n    }\n  };\n\n  /**\n   * @return {HTMLCanvasElement} Canvas.\n   */\n  WebGLContext.prototype.getCanvas = function getCanvas () {\n    return this.canvas_;\n  };\n\n  /**\n   * Get the WebGL rendering context\n   * @return {WebGLRenderingContext} The rendering context.\n   * @api\n   */\n  WebGLContext.prototype.getGL = function getGL () {\n    return this.gl_;\n  };\n\n  /**\n   * Get the frame buffer for hit detection.\n   * @return {WebGLFramebuffer} The hit detection frame buffer.\n   */\n  WebGLContext.prototype.getHitDetectionFramebuffer = function getHitDetectionFramebuffer () {\n    if (!this.hitDetectionFramebuffer_) {\n      this.initHitDetectionFramebuffer_();\n    }\n    return this.hitDetectionFramebuffer_;\n  };\n\n  /**\n   * Get shader from the cache if it's in the cache. Otherwise, create\n   * the WebGL shader, compile it, and add entry to cache.\n   * @param {import(\"./Shader.js\").default} shaderObject Shader object.\n   * @return {WebGLShader} Shader.\n   */\n  WebGLContext.prototype.getShader = function getShader (shaderObject) {\n    var shaderKey = getUid(shaderObject);\n    if (shaderKey in this.shaderCache_) {\n      return this.shaderCache_[shaderKey];\n    } else {\n      var gl = this.getGL();\n      var shader = gl.createShader(shaderObject.getType());\n      gl.shaderSource(shader, shaderObject.getSource());\n      gl.compileShader(shader);\n      this.shaderCache_[shaderKey] = shader;\n      return shader;\n    }\n  };\n\n  /**\n   * Get the program from the cache if it's in the cache. Otherwise create\n   * the WebGL program, attach the shaders to it, and add an entry to the\n   * cache.\n   * @param {import(\"./Fragment.js\").default} fragmentShaderObject Fragment shader.\n   * @param {import(\"./Vertex.js\").default} vertexShaderObject Vertex shader.\n   * @return {WebGLProgram} Program.\n   */\n  WebGLContext.prototype.getProgram = function getProgram (fragmentShaderObject, vertexShaderObject) {\n    var programKey = getUid(fragmentShaderObject) + '/' + getUid(vertexShaderObject);\n    if (programKey in this.programCache_) {\n      return this.programCache_[programKey];\n    } else {\n      var gl = this.getGL();\n      var program = gl.createProgram();\n      gl.attachShader(program, this.getShader(fragmentShaderObject));\n      gl.attachShader(program, this.getShader(vertexShaderObject));\n      gl.linkProgram(program);\n      this.programCache_[programKey] = program;\n      return program;\n    }\n  };\n\n  /**\n   * FIXME empty description for jsdoc\n   */\n  WebGLContext.prototype.handleWebGLContextLost = function handleWebGLContextLost () {\n    clear(this.bufferCache_);\n    clear(this.shaderCache_);\n    clear(this.programCache_);\n    this.currentProgram_ = null;\n    this.hitDetectionFramebuffer_ = null;\n    this.hitDetectionTexture_ = null;\n    this.hitDetectionRenderbuffer_ = null;\n  };\n\n  /**\n   * FIXME empty description for jsdoc\n   */\n  WebGLContext.prototype.handleWebGLContextRestored = function handleWebGLContextRestored () {\n  };\n\n  /**\n   * Creates a 1x1 pixel framebuffer for the hit-detection.\n   * @private\n   */\n  WebGLContext.prototype.initHitDetectionFramebuffer_ = function initHitDetectionFramebuffer_ () {\n    var gl = this.gl_;\n    var framebuffer = gl.createFramebuffer();\n    gl.bindFramebuffer(gl.FRAMEBUFFER, framebuffer);\n\n    var texture = createEmptyTexture(gl, 1, 1);\n    var renderbuffer = gl.createRenderbuffer();\n    gl.bindRenderbuffer(gl.RENDERBUFFER, renderbuffer);\n    gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_COMPONENT16, 1, 1);\n    gl.framebufferTexture2D(\n      gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture, 0);\n    gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT,\n      gl.RENDERBUFFER, renderbuffer);\n\n    gl.bindTexture(gl.TEXTURE_2D, null);\n    gl.bindRenderbuffer(gl.RENDERBUFFER, null);\n    gl.bindFramebuffer(gl.FRAMEBUFFER, null);\n\n    this.hitDetectionFramebuffer_ = framebuffer;\n    this.hitDetectionTexture_ = texture;\n    this.hitDetectionRenderbuffer_ = renderbuffer;\n  };\n\n  /**\n   * Use a program.  If the program is already in use, this will return `false`.\n   * @param {WebGLProgram} program Program.\n   * @return {boolean} Changed.\n   * @api\n   */\n  WebGLContext.prototype.useProgram = function useProgram (program) {\n    if (program == this.currentProgram_) {\n      return false;\n    } else {\n      var gl = this.getGL();\n      gl.useProgram(program);\n      this.currentProgram_ = program;\n      return true;\n    }\n  };\n\n  return WebGLContext;\n}(Disposable));\n\n\n/**\n * @param {WebGLRenderingContext} gl WebGL rendering context.\n * @param {number=} opt_wrapS wrapS.\n * @param {number=} opt_wrapT wrapT.\n * @return {WebGLTexture} The texture.\n */\nfunction createTextureInternal(gl, opt_wrapS, opt_wrapT) {\n  var texture = gl.createTexture();\n  gl.bindTexture(gl.TEXTURE_2D, texture);\n  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);\n  gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);\n\n  if (opt_wrapS !== undefined) {\n    gl.texParameteri(\n      TEXTURE_2D, TEXTURE_WRAP_S, opt_wrapS);\n  }\n  if (opt_wrapT !== undefined) {\n    gl.texParameteri(\n      TEXTURE_2D, TEXTURE_WRAP_T, opt_wrapT);\n  }\n\n  return texture;\n}\n\n\n/**\n * @param {WebGLRenderingContext} gl WebGL rendering context.\n * @param {number} width Width.\n * @param {number} height Height.\n * @param {number=} opt_wrapS wrapS.\n * @param {number=} opt_wrapT wrapT.\n * @return {WebGLTexture} The texture.\n */\nexport function createEmptyTexture(gl, width, height, opt_wrapS, opt_wrapT) {\n  var texture = createTextureInternal(gl, opt_wrapS, opt_wrapT);\n  gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);\n  return texture;\n}\n\n\n/**\n * @param {WebGLRenderingContext} gl WebGL rendering context.\n * @param {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} image Image.\n * @param {number=} opt_wrapS wrapS.\n * @param {number=} opt_wrapT wrapT.\n * @return {WebGLTexture} The texture.\n */\nexport function createTexture(gl, image, opt_wrapS, opt_wrapT) {\n  var texture = createTextureInternal(gl, opt_wrapS, opt_wrapT);\n  gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image);\n  return texture;\n}\n\nexport default WebGLContext;\n\n//# sourceMappingURL=Context.js.map","/**\n * @module ol/render/webgl/TextureReplay\n */\nimport {abstract, getUid} from '../../util.js';\nimport {intersects} from '../../extent.js';\nimport {isEmpty} from '../../obj.js';\nimport {fragment, vertex} from './texturereplay/defaultshader.js';\nimport Locations from './texturereplay/defaultshader/Locations.js';\nimport WebGLReplay from './Replay.js';\nimport {CLAMP_TO_EDGE, FLOAT, TEXTURE_2D} from '../../webgl.js';\nimport {createTexture} from '../../webgl/Context.js';\n\nvar WebGLTextureReplay = /*@__PURE__*/(function (WebGLReplay) {\n  function WebGLTextureReplay(tolerance, maxExtent) {\n    WebGLReplay.call(this, tolerance, maxExtent);\n\n    /**\n     * @type {number|undefined}\n     * @protected\n     */\n    this.anchorX = undefined;\n\n    /**\n     * @type {number|undefined}\n     * @protected\n     */\n    this.anchorY = undefined;\n\n    /**\n     * @type {Array<number>}\n     * @protected\n     */\n    this.groupIndices = [];\n\n    /**\n     * @type {Array<number>}\n     * @protected\n     */\n    this.hitDetectionGroupIndices = [];\n\n    /**\n     * @type {number|undefined}\n     * @protected\n     */\n    this.height = undefined;\n\n    /**\n     * @type {number|undefined}\n     * @protected\n     */\n    this.imageHeight = undefined;\n\n    /**\n     * @type {number|undefined}\n     * @protected\n     */\n    this.imageWidth = undefined;\n\n    /**\n     * @protected\n     * @type {import(\"./texturereplay/defaultshader/Locations.js\").default}\n     */\n    this.defaultLocations = null;\n\n    /**\n     * @protected\n     * @type {number|undefined}\n     */\n    this.opacity = undefined;\n\n    /**\n     * @type {number|undefined}\n     * @protected\n     */\n    this.originX = undefined;\n\n    /**\n     * @type {number|undefined}\n     * @protected\n     */\n    this.originY = undefined;\n\n    /**\n     * @protected\n     * @type {boolean|undefined}\n     */\n    this.rotateWithView = undefined;\n\n    /**\n     * @protected\n     * @type {number|undefined}\n     */\n    this.rotation = undefined;\n\n    /**\n     * @protected\n     * @type {number|undefined}\n     */\n    this.scale = undefined;\n\n    /**\n     * @type {number|undefined}\n     * @protected\n     */\n    this.width = undefined;\n  }\n\n  if ( WebGLReplay ) WebGLTextureReplay.__proto__ = WebGLReplay;\n  WebGLTextureReplay.prototype = Object.create( WebGLReplay && WebGLReplay.prototype );\n  WebGLTextureReplay.prototype.constructor = WebGLTextureReplay;\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextureReplay.prototype.getDeleteResourcesFunction = function getDeleteResourcesFunction (context) {\n    var verticesBuffer = this.verticesBuffer;\n    var indicesBuffer = this.indicesBuffer;\n    var textures = this.getTextures(true);\n    var gl = context.getGL();\n    return function() {\n      if (!gl.isContextLost()) {\n        var i, ii;\n        for (i = 0, ii = textures.length; i < ii; ++i) {\n          gl.deleteTexture(textures[i]);\n        }\n      }\n      context.deleteBuffer(verticesBuffer);\n      context.deleteBuffer(indicesBuffer);\n    };\n  };\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @return {number} My end.\n   * @protected\n   */\n  WebGLTextureReplay.prototype.drawCoordinates = function drawCoordinates (flatCoordinates, offset, end, stride) {\n    var anchorX = /** @type {number} */ (this.anchorX);\n    var anchorY = /** @type {number} */ (this.anchorY);\n    var height = /** @type {number} */ (this.height);\n    var imageHeight = /** @type {number} */ (this.imageHeight);\n    var imageWidth = /** @type {number} */ (this.imageWidth);\n    var opacity = /** @type {number} */ (this.opacity);\n    var originX = /** @type {number} */ (this.originX);\n    var originY = /** @type {number} */ (this.originY);\n    var rotateWithView = this.rotateWithView ? 1.0 : 0.0;\n    // this.rotation_ is anti-clockwise, but rotation is clockwise\n    var rotation = /** @type {number} */ (-this.rotation);\n    var scale = /** @type {number} */ (this.scale);\n    var width = /** @type {number} */ (this.width);\n    var cos = Math.cos(rotation);\n    var sin = Math.sin(rotation);\n    var numIndices = this.indices.length;\n    var numVertices = this.vertices.length;\n    var i, n, offsetX, offsetY, x, y;\n    for (i = offset; i < end; i += stride) {\n      x = flatCoordinates[i] - this.origin[0];\n      y = flatCoordinates[i + 1] - this.origin[1];\n\n      // There are 4 vertices per [x, y] point, one for each corner of the\n      // rectangle we're going to draw. We'd use 1 vertex per [x, y] point if\n      // WebGL supported Geometry Shaders (which can emit new vertices), but that\n      // is not currently the case.\n      //\n      // And each vertex includes 8 values: the x and y coordinates, the x and\n      // y offsets used to calculate the position of the corner, the u and\n      // v texture coordinates for the corner, the opacity, and whether the\n      // the image should be rotated with the view (rotateWithView).\n\n      n = numVertices / 8;\n\n      // bottom-left corner\n      offsetX = -scale * anchorX;\n      offsetY = -scale * (height - anchorY);\n      this.vertices[numVertices++] = x;\n      this.vertices[numVertices++] = y;\n      this.vertices[numVertices++] = offsetX * cos - offsetY * sin;\n      this.vertices[numVertices++] = offsetX * sin + offsetY * cos;\n      this.vertices[numVertices++] = originX / imageWidth;\n      this.vertices[numVertices++] = (originY + height) / imageHeight;\n      this.vertices[numVertices++] = opacity;\n      this.vertices[numVertices++] = rotateWithView;\n\n      // bottom-right corner\n      offsetX = scale * (width - anchorX);\n      offsetY = -scale * (height - anchorY);\n      this.vertices[numVertices++] = x;\n      this.vertices[numVertices++] = y;\n      this.vertices[numVertices++] = offsetX * cos - offsetY * sin;\n      this.vertices[numVertices++] = offsetX * sin + offsetY * cos;\n      this.vertices[numVertices++] = (originX + width) / imageWidth;\n      this.vertices[numVertices++] = (originY + height) / imageHeight;\n      this.vertices[numVertices++] = opacity;\n      this.vertices[numVertices++] = rotateWithView;\n\n      // top-right corner\n      offsetX = scale * (width - anchorX);\n      offsetY = scale * anchorY;\n      this.vertices[numVertices++] = x;\n      this.vertices[numVertices++] = y;\n      this.vertices[numVertices++] = offsetX * cos - offsetY * sin;\n      this.vertices[numVertices++] = offsetX * sin + offsetY * cos;\n      this.vertices[numVertices++] = (originX + width) / imageWidth;\n      this.vertices[numVertices++] = originY / imageHeight;\n      this.vertices[numVertices++] = opacity;\n      this.vertices[numVertices++] = rotateWithView;\n\n      // top-left corner\n      offsetX = -scale * anchorX;\n      offsetY = scale * anchorY;\n      this.vertices[numVertices++] = x;\n      this.vertices[numVertices++] = y;\n      this.vertices[numVertices++] = offsetX * cos - offsetY * sin;\n      this.vertices[numVertices++] = offsetX * sin + offsetY * cos;\n      this.vertices[numVertices++] = originX / imageWidth;\n      this.vertices[numVertices++] = originY / imageHeight;\n      this.vertices[numVertices++] = opacity;\n      this.vertices[numVertices++] = rotateWithView;\n\n      this.indices[numIndices++] = n;\n      this.indices[numIndices++] = n + 1;\n      this.indices[numIndices++] = n + 2;\n      this.indices[numIndices++] = n;\n      this.indices[numIndices++] = n + 2;\n      this.indices[numIndices++] = n + 3;\n    }\n\n    return numVertices;\n  };\n\n  /**\n   * @protected\n   * @param {Array<WebGLTexture>} textures Textures.\n   * @param {Array<HTMLCanvasElement|HTMLImageElement|HTMLVideoElement>} images Images.\n   * @param {!Object<string, WebGLTexture>} texturePerImage Texture cache.\n   * @param {WebGLRenderingContext} gl Gl.\n   */\n  WebGLTextureReplay.prototype.createTextures = function createTextures (textures, images, texturePerImage, gl) {\n    var texture, image, uid, i;\n    var ii = images.length;\n    for (i = 0; i < ii; ++i) {\n      image = images[i];\n\n      uid = getUid(image);\n      if (uid in texturePerImage) {\n        texture = texturePerImage[uid];\n      } else {\n        texture = createTexture(\n          gl, image, CLAMP_TO_EDGE, CLAMP_TO_EDGE);\n        texturePerImage[uid] = texture;\n      }\n      textures[i] = texture;\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextureReplay.prototype.setUpProgram = function setUpProgram (gl, context, size, pixelRatio) {\n    // get the program\n    var program = context.getProgram(fragment, vertex);\n\n    // get the locations\n    var locations;\n    if (!this.defaultLocations) {\n      locations = new Locations(gl, program);\n      this.defaultLocations = locations;\n    } else {\n      locations = this.defaultLocations;\n    }\n\n    // use the program (FIXME: use the return value)\n    context.useProgram(program);\n\n    // enable the vertex attrib arrays\n    gl.enableVertexAttribArray(locations.a_position);\n    gl.vertexAttribPointer(locations.a_position, 2, FLOAT,\n      false, 32, 0);\n\n    gl.enableVertexAttribArray(locations.a_offsets);\n    gl.vertexAttribPointer(locations.a_offsets, 2, FLOAT,\n      false, 32, 8);\n\n    gl.enableVertexAttribArray(locations.a_texCoord);\n    gl.vertexAttribPointer(locations.a_texCoord, 2, FLOAT,\n      false, 32, 16);\n\n    gl.enableVertexAttribArray(locations.a_opacity);\n    gl.vertexAttribPointer(locations.a_opacity, 1, FLOAT,\n      false, 32, 24);\n\n    gl.enableVertexAttribArray(locations.a_rotateWithView);\n    gl.vertexAttribPointer(locations.a_rotateWithView, 1, FLOAT,\n      false, 32, 28);\n\n    return locations;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextureReplay.prototype.shutDownProgram = function shutDownProgram (gl, locations) {\n    gl.disableVertexAttribArray(locations.a_position);\n    gl.disableVertexAttribArray(locations.a_offsets);\n    gl.disableVertexAttribArray(locations.a_texCoord);\n    gl.disableVertexAttribArray(locations.a_opacity);\n    gl.disableVertexAttribArray(locations.a_rotateWithView);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextureReplay.prototype.drawReplay = function drawReplay (gl, context, skippedFeaturesHash, hitDetection) {\n    var textures = hitDetection ? this.getHitDetectionTextures() : this.getTextures();\n    var groupIndices = hitDetection ? this.hitDetectionGroupIndices : this.groupIndices;\n\n    if (!isEmpty(skippedFeaturesHash)) {\n      this.drawReplaySkipping(gl, context, skippedFeaturesHash, textures, groupIndices);\n    } else {\n      var i, ii, start;\n      for (i = 0, ii = textures.length, start = 0; i < ii; ++i) {\n        gl.bindTexture(TEXTURE_2D, textures[i]);\n        var end = groupIndices[i];\n        this.drawElements(gl, context, start, end);\n        start = end;\n      }\n    }\n  };\n\n  /**\n   * Draw the replay while paying attention to skipped features.\n   *\n   * This functions creates groups of features that can be drawn to together,\n   * so that the number of `drawElements` calls is minimized.\n   *\n   * For example given the following texture groups:\n   *\n   *    Group 1: A B C\n   *    Group 2: D [E] F G\n   *\n   * If feature E should be skipped, the following `drawElements` calls will be\n   * made:\n   *\n   *    drawElements with feature A, B and C\n   *    drawElements with feature D\n   *    drawElements with feature F and G\n   *\n   * @protected\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features\n   *  to skip.\n   * @param {Array<WebGLTexture>} textures Textures.\n   * @param {Array<number>} groupIndices Texture group indices.\n   */\n  WebGLTextureReplay.prototype.drawReplaySkipping = function drawReplaySkipping (gl, context, skippedFeaturesHash, textures, groupIndices) {\n    var featureIndex = 0;\n\n    var i, ii;\n    for (i = 0, ii = textures.length; i < ii; ++i) {\n      gl.bindTexture(TEXTURE_2D, textures[i]);\n      var groupStart = (i > 0) ? groupIndices[i - 1] : 0;\n      var groupEnd = groupIndices[i];\n\n      var start = groupStart;\n      var end = groupStart;\n      while (featureIndex < this.startIndices.length &&\n          this.startIndices[featureIndex] <= groupEnd) {\n        var feature = this.startIndicesFeature[featureIndex];\n\n        if (skippedFeaturesHash[getUid(feature)] !== undefined) {\n          // feature should be skipped\n          if (start !== end) {\n            // draw the features so far\n            this.drawElements(gl, context, start, end);\n          }\n          // continue with the next feature\n          start = (featureIndex === this.startIndices.length - 1) ?\n            groupEnd : this.startIndices[featureIndex + 1];\n          end = start;\n        } else {\n          // the feature is not skipped, augment the end index\n          end = (featureIndex === this.startIndices.length - 1) ?\n            groupEnd : this.startIndices[featureIndex + 1];\n        }\n        featureIndex++;\n      }\n\n      if (start !== end) {\n        // draw the remaining features (in case there was no skipped feature\n        // in this texture group, all features of a group are drawn together)\n        this.drawElements(gl, context, start, end);\n      }\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextureReplay.prototype.drawHitDetectionReplayOneByOne = function drawHitDetectionReplayOneByOne (gl, context, skippedFeaturesHash, featureCallback, opt_hitExtent) {\n    var i, groupStart, start, end, feature;\n    var featureIndex = this.startIndices.length - 1;\n    var hitDetectionTextures = this.getHitDetectionTextures();\n    for (i = hitDetectionTextures.length - 1; i >= 0; --i) {\n      gl.bindTexture(TEXTURE_2D, hitDetectionTextures[i]);\n      groupStart = (i > 0) ? this.hitDetectionGroupIndices[i - 1] : 0;\n      end = this.hitDetectionGroupIndices[i];\n\n      // draw all features for this texture group\n      while (featureIndex >= 0 &&\n          this.startIndices[featureIndex] >= groupStart) {\n        start = this.startIndices[featureIndex];\n        feature = this.startIndicesFeature[featureIndex];\n\n        if (skippedFeaturesHash[getUid(feature)] === undefined &&\n            feature.getGeometry() &&\n            (opt_hitExtent === undefined || intersects(\n              /** @type {Array<number>} */ (opt_hitExtent),\n              feature.getGeometry().getExtent()))) {\n          gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);\n          this.drawElements(gl, context, start, end);\n\n          var result = featureCallback(feature);\n          if (result) {\n            return result;\n          }\n        }\n\n        end = start;\n        featureIndex--;\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextureReplay.prototype.finish = function finish (context) {\n    this.anchorX = undefined;\n    this.anchorY = undefined;\n    this.height = undefined;\n    this.imageHeight = undefined;\n    this.imageWidth = undefined;\n    this.indices = null;\n    this.opacity = undefined;\n    this.originX = undefined;\n    this.originY = undefined;\n    this.rotateWithView = undefined;\n    this.rotation = undefined;\n    this.scale = undefined;\n    this.vertices = null;\n    this.width = undefined;\n  };\n\n  /**\n   * @abstract\n   * @protected\n   * @param {boolean=} opt_all Return hit detection textures with regular ones.\n   * @return {Array<WebGLTexture>} Textures.\n   */\n  WebGLTextureReplay.prototype.getTextures = function getTextures (opt_all) {\n    return abstract();\n  };\n\n  /**\n   * @abstract\n   * @protected\n   * @return {Array<WebGLTexture>} Textures.\n   */\n  WebGLTextureReplay.prototype.getHitDetectionTextures = function getHitDetectionTextures () {\n    return abstract();\n  };\n\n  return WebGLTextureReplay;\n}(WebGLReplay));\n\n\nexport default WebGLTextureReplay;\n\n//# sourceMappingURL=TextureReplay.js.map","/**\n * @module ol/render/webgl/ImageReplay\n */\nimport {getUid} from '../../util.js';\nimport WebGLTextureReplay from './TextureReplay.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\n\nvar WebGLImageReplay = /*@__PURE__*/(function (WebGLTextureReplay) {\n  function WebGLImageReplay(tolerance, maxExtent) {\n    WebGLTextureReplay.call(this, tolerance, maxExtent);\n\n    /**\n     * @type {Array<HTMLCanvasElement|HTMLImageElement|HTMLVideoElement>}\n     * @protected\n     */\n    this.images_ = [];\n\n    /**\n     * @type {Array<HTMLCanvasElement|HTMLImageElement|HTMLVideoElement>}\n     * @protected\n     */\n    this.hitDetectionImages_ = [];\n\n    /**\n     * @type {Array<WebGLTexture>}\n     * @private\n     */\n    this.textures_ = [];\n\n    /**\n     * @type {Array<WebGLTexture>}\n     * @private\n     */\n    this.hitDetectionTextures_ = [];\n\n  }\n\n  if ( WebGLTextureReplay ) WebGLImageReplay.__proto__ = WebGLTextureReplay;\n  WebGLImageReplay.prototype = Object.create( WebGLTextureReplay && WebGLTextureReplay.prototype );\n  WebGLImageReplay.prototype.constructor = WebGLImageReplay;\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImageReplay.prototype.drawMultiPoint = function drawMultiPoint (multiPointGeometry, feature) {\n    this.startIndices.push(this.indices.length);\n    this.startIndicesFeature.push(feature);\n    var flatCoordinates = multiPointGeometry.getFlatCoordinates();\n    var stride = multiPointGeometry.getStride();\n    this.drawCoordinates(\n      flatCoordinates, 0, flatCoordinates.length, stride);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImageReplay.prototype.drawPoint = function drawPoint (pointGeometry, feature) {\n    this.startIndices.push(this.indices.length);\n    this.startIndicesFeature.push(feature);\n    var flatCoordinates = pointGeometry.getFlatCoordinates();\n    var stride = pointGeometry.getStride();\n    this.drawCoordinates(\n      flatCoordinates, 0, flatCoordinates.length, stride);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImageReplay.prototype.finish = function finish (context) {\n    var gl = context.getGL();\n\n    this.groupIndices.push(this.indices.length);\n    this.hitDetectionGroupIndices.push(this.indices.length);\n\n    // create, bind, and populate the vertices buffer\n    this.verticesBuffer = new WebGLBuffer(this.vertices);\n\n    var indices = this.indices;\n\n    // create, bind, and populate the indices buffer\n    this.indicesBuffer = new WebGLBuffer(indices);\n\n    // create textures\n    /** @type {Object<string, WebGLTexture>} */\n    var texturePerImage = {};\n\n    this.createTextures(this.textures_, this.images_, texturePerImage, gl);\n\n    this.createTextures(this.hitDetectionTextures_, this.hitDetectionImages_,\n      texturePerImage, gl);\n\n    this.images_ = null;\n    this.hitDetectionImages_ = null;\n    WebGLTextureReplay.prototype.finish.call(this, context);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImageReplay.prototype.setImageStyle = function setImageStyle (imageStyle) {\n    var anchor = imageStyle.getAnchor();\n    var image = imageStyle.getImage(1);\n    var imageSize = imageStyle.getImageSize();\n    var hitDetectionImage = imageStyle.getHitDetectionImage(1);\n    var opacity = imageStyle.getOpacity();\n    var origin = imageStyle.getOrigin();\n    var rotateWithView = imageStyle.getRotateWithView();\n    var rotation = imageStyle.getRotation();\n    var size = imageStyle.getSize();\n    var scale = imageStyle.getScale();\n\n    var currentImage;\n    if (this.images_.length === 0) {\n      this.images_.push(image);\n    } else {\n      currentImage = this.images_[this.images_.length - 1];\n      if (getUid(currentImage) != getUid(image)) {\n        this.groupIndices.push(this.indices.length);\n        this.images_.push(image);\n      }\n    }\n\n    if (this.hitDetectionImages_.length === 0) {\n      this.hitDetectionImages_.push(hitDetectionImage);\n    } else {\n      currentImage =\n          this.hitDetectionImages_[this.hitDetectionImages_.length - 1];\n      if (getUid(currentImage) != getUid(hitDetectionImage)) {\n        this.hitDetectionGroupIndices.push(this.indices.length);\n        this.hitDetectionImages_.push(hitDetectionImage);\n      }\n    }\n\n    this.anchorX = anchor[0];\n    this.anchorY = anchor[1];\n    this.height = size[1];\n    this.imageHeight = imageSize[1];\n    this.imageWidth = imageSize[0];\n    this.opacity = opacity;\n    this.originX = origin[0];\n    this.originY = origin[1];\n    this.rotation = rotation;\n    this.rotateWithView = rotateWithView;\n    this.scale = scale;\n    this.width = size[0];\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImageReplay.prototype.getTextures = function getTextures (opt_all) {\n    return opt_all ? this.textures_.concat(this.hitDetectionTextures_) : this.textures_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImageReplay.prototype.getHitDetectionTextures = function getHitDetectionTextures () {\n    return this.hitDetectionTextures_;\n  };\n\n  return WebGLImageReplay;\n}(WebGLTextureReplay));\n\n\nexport default WebGLImageReplay;\n\n//# sourceMappingURL=ImageReplay.js.map","/**\n * @module ol/geom/flat/topology\n */\nimport {linearRing as linearRingArea} from './area.js';\n\n/**\n * Check if the linestring is a boundary.\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {boolean} The linestring is a boundary.\n */\nexport function lineStringIsClosed(flatCoordinates, offset, end, stride) {\n  var lastCoord = end - stride;\n  if (flatCoordinates[offset] === flatCoordinates[lastCoord] &&\n      flatCoordinates[offset + 1] === flatCoordinates[lastCoord + 1] && (end - offset) / stride > 3) {\n    return !!linearRingArea(flatCoordinates, offset, end, stride);\n  }\n  return false;\n}\n\n//# sourceMappingURL=topology.js.map","/**\n * @module ol/render/webgl/linestringreplay/defaultshader\n */\n// This file is automatically generated, do not edit.\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../webgl.js';\nimport WebGLFragment from '../../../webgl/Fragment.js';\nimport WebGLVertex from '../../../webgl/Vertex.js';\n\nexport var fragment = new WebGLFragment(DEBUG_WEBGL ?\n  'precision mediump float;\\nvarying float v_round;\\nvarying vec2 v_roundVertex;\\nvarying float v_halfWidth;\\n\\n\\n\\nuniform float u_opacity;\\nuniform vec4 u_color;\\nuniform vec2 u_size;\\nuniform float u_pixelRatio;\\n\\nvoid main(void) {\\n  if (v_round > 0.0) {\\n    vec2 windowCoords = vec2((v_roundVertex.x + 1.0) / 2.0 * u_size.x * u_pixelRatio,\\n        (v_roundVertex.y + 1.0) / 2.0 * u_size.y * u_pixelRatio);\\n    if (length(windowCoords - gl_FragCoord.xy) > v_halfWidth * u_pixelRatio) {\\n      discard;\\n    }\\n  }\\n  gl_FragColor = u_color;\\n  float alpha = u_color.a * u_opacity;\\n  if (alpha == 0.0) {\\n    discard;\\n  }\\n  gl_FragColor.a = alpha;\\n}\\n' :\n  'precision mediump float;varying float a;varying vec2 aVertex;varying float c;uniform float m;uniform vec4 n;uniform vec2 o;uniform float p;void main(void){if(a>0.0){vec2 windowCoords=vec2((aVertex.x+1.0)/2.0*o.x*p,(aVertex.y+1.0)/2.0*o.y*p);if(length(windowCoords-gl_FragCoord.xy)>c*p){discard;}} gl_FragColor=n;float alpha=n.a*m;if(alpha==0.0){discard;}gl_FragColor.a=alpha;}');\n\nexport var vertex = new WebGLVertex(DEBUG_WEBGL ?\n  'varying float v_round;\\nvarying vec2 v_roundVertex;\\nvarying float v_halfWidth;\\n\\n\\nattribute vec2 a_lastPos;\\nattribute vec2 a_position;\\nattribute vec2 a_nextPos;\\nattribute float a_direction;\\n\\nuniform mat4 u_projectionMatrix;\\nuniform mat4 u_offsetScaleMatrix;\\nuniform mat4 u_offsetRotateMatrix;\\nuniform float u_lineWidth;\\nuniform float u_miterLimit;\\n\\nbool nearlyEquals(in float value, in float ref) {\\n  float epsilon = 0.000000000001;\\n  return value >= ref - epsilon && value <= ref + epsilon;\\n}\\n\\nvoid alongNormal(out vec2 offset, in vec2 nextP, in float turnDir, in float direction) {\\n  vec2 dirVect = nextP - a_position;\\n  vec2 normal = normalize(vec2(-turnDir * dirVect.y, turnDir * dirVect.x));\\n  offset = u_lineWidth / 2.0 * normal * direction;\\n}\\n\\nvoid miterUp(out vec2 offset, out float round, in bool isRound, in float direction) {\\n  float halfWidth = u_lineWidth / 2.0;\\n  vec2 tangent = normalize(normalize(a_nextPos - a_position) + normalize(a_position - a_lastPos));\\n  vec2 normal = vec2(-tangent.y, tangent.x);\\n  vec2 dirVect = a_nextPos - a_position;\\n  vec2 tmpNormal = normalize(vec2(-dirVect.y, dirVect.x));\\n  float miterLength = abs(halfWidth / dot(normal, tmpNormal));\\n  offset = normal * direction * miterLength;\\n  round = 0.0;\\n  if (isRound) {\\n    round = 1.0;\\n  } else if (miterLength > u_miterLimit + u_lineWidth) {\\n    offset = halfWidth * tmpNormal * direction;\\n  }\\n}\\n\\nbool miterDown(out vec2 offset, in vec4 projPos, in mat4 offsetMatrix, in float direction) {\\n  bool degenerate = false;\\n  vec2 tangent = normalize(normalize(a_nextPos - a_position) + normalize(a_position - a_lastPos));\\n  vec2 normal = vec2(-tangent.y, tangent.x);\\n  vec2 dirVect = a_lastPos - a_position;\\n  vec2 tmpNormal = normalize(vec2(-dirVect.y, dirVect.x));\\n  vec2 longOffset, shortOffset, longVertex;\\n  vec4 shortProjVertex;\\n  float halfWidth = u_lineWidth / 2.0;\\n  if (length(a_nextPos - a_position) > length(a_lastPos - a_position)) {\\n    longOffset = tmpNormal * direction * halfWidth;\\n    shortOffset = normalize(vec2(dirVect.y, -dirVect.x)) * direction * halfWidth;\\n    longVertex = a_nextPos;\\n    shortProjVertex = u_projectionMatrix * vec4(a_lastPos, 0.0, 1.0);\\n  } else {\\n    shortOffset = tmpNormal * direction * halfWidth;\\n    longOffset = normalize(vec2(dirVect.y, -dirVect.x)) * direction * halfWidth;\\n    longVertex = a_lastPos;\\n    shortProjVertex = u_projectionMatrix * vec4(a_nextPos, 0.0, 1.0);\\n  }\\n  //Intersection algorithm based on theory by Paul Bourke (http://paulbourke.net/geometry/pointlineplane/).\\n  vec4 p1 = u_projectionMatrix * vec4(longVertex, 0.0, 1.0) + offsetMatrix * vec4(longOffset, 0.0, 0.0);\\n  vec4 p2 = projPos + offsetMatrix * vec4(longOffset, 0.0, 0.0);\\n  vec4 p3 = shortProjVertex + offsetMatrix * vec4(-shortOffset, 0.0, 0.0);\\n  vec4 p4 = shortProjVertex + offsetMatrix * vec4(shortOffset, 0.0, 0.0);\\n  float denom = (p4.y - p3.y) * (p2.x - p1.x) - (p4.x - p3.x) * (p2.y - p1.y);\\n  float firstU = ((p4.x - p3.x) * (p1.y - p3.y) - (p4.y - p3.y) * (p1.x - p3.x)) / denom;\\n  float secondU = ((p2.x - p1.x) * (p1.y - p3.y) - (p2.y - p1.y) * (p1.x - p3.x)) / denom;\\n  float epsilon = 0.000000000001;\\n  if (firstU > epsilon && firstU < 1.0 - epsilon && secondU > epsilon && secondU < 1.0 - epsilon) {\\n    shortProjVertex.x = p1.x + firstU * (p2.x - p1.x);\\n    shortProjVertex.y = p1.y + firstU * (p2.y - p1.y);\\n    offset = shortProjVertex.xy;\\n    degenerate = true;\\n  } else {\\n    float miterLength = abs(halfWidth / dot(normal, tmpNormal));\\n    offset = normal * direction * miterLength;\\n  }\\n  return degenerate;\\n}\\n\\nvoid squareCap(out vec2 offset, out float round, in bool isRound, in vec2 nextP,\\n    in float turnDir, in float direction) {\\n  round = 0.0;\\n  vec2 dirVect = a_position - nextP;\\n  vec2 firstNormal = normalize(dirVect);\\n  vec2 secondNormal = vec2(turnDir * firstNormal.y * direction, -turnDir * firstNormal.x * direction);\\n  vec2 hypotenuse = normalize(firstNormal - secondNormal);\\n  vec2 normal = vec2(turnDir * hypotenuse.y * direction, -turnDir * hypotenuse.x * direction);\\n  float length = sqrt(v_halfWidth * v_halfWidth * 2.0);\\n  offset = normal * length;\\n  if (isRound) {\\n    round = 1.0;\\n  }\\n}\\n\\nvoid main(void) {\\n  bool degenerate = false;\\n  float direction = float(sign(a_direction));\\n  mat4 offsetMatrix = u_offsetScaleMatrix * u_offsetRotateMatrix;\\n  vec2 offset;\\n  vec4 projPos = u_projectionMatrix * vec4(a_position, 0.0, 1.0);\\n  bool round = nearlyEquals(mod(a_direction, 2.0), 0.0);\\n\\n  v_round = 0.0;\\n  v_halfWidth = u_lineWidth / 2.0;\\n  v_roundVertex = projPos.xy;\\n\\n  if (nearlyEquals(mod(a_direction, 3.0), 0.0) || nearlyEquals(mod(a_direction, 17.0), 0.0)) {\\n    alongNormal(offset, a_nextPos, 1.0, direction);\\n  } else if (nearlyEquals(mod(a_direction, 5.0), 0.0) || nearlyEquals(mod(a_direction, 13.0), 0.0)) {\\n    alongNormal(offset, a_lastPos, -1.0, direction);\\n  } else if (nearlyEquals(mod(a_direction, 23.0), 0.0)) {\\n    miterUp(offset, v_round, round, direction);\\n  } else if (nearlyEquals(mod(a_direction, 19.0), 0.0)) {\\n    degenerate = miterDown(offset, projPos, offsetMatrix, direction);\\n  } else if (nearlyEquals(mod(a_direction, 7.0), 0.0)) {\\n    squareCap(offset, v_round, round, a_nextPos, 1.0, direction);\\n  } else if (nearlyEquals(mod(a_direction, 11.0), 0.0)) {\\n    squareCap(offset, v_round, round, a_lastPos, -1.0, direction);\\n  }\\n  if (!degenerate) {\\n    vec4 offsets = offsetMatrix * vec4(offset, 0.0, 0.0);\\n    gl_Position = projPos + offsets;\\n  } else {\\n    gl_Position = vec4(offset, 0.0, 1.0);\\n  }\\n}\\n\\n\\n' :\n  'varying float a;varying vec2 aVertex;varying float c;attribute vec2 d;attribute vec2 e;attribute vec2 f;attribute float g;uniform mat4 h;uniform mat4 i;uniform mat4 j;uniform float k;uniform float l;bool nearlyEquals(in float value,in float ref){float epsilon=0.000000000001;return value>=ref-epsilon&&value<=ref+epsilon;}void alongNormal(out vec2 offset,in vec2 nextP,in float turnDir,in float direction){vec2 dirVect=nextP-e;vec2 normal=normalize(vec2(-turnDir*dirVect.y,turnDir*dirVect.x));offset=k/2.0*normal*direction;}void miterUp(out vec2 offset,out float round,in bool isRound,in float direction){float halfWidth=k/2.0;vec2 tangent=normalize(normalize(f-e)+normalize(e-d));vec2 normal=vec2(-tangent.y,tangent.x);vec2 dirVect=f-e;vec2 tmpNormal=normalize(vec2(-dirVect.y,dirVect.x));float miterLength=abs(halfWidth/dot(normal,tmpNormal));offset=normal*direction*miterLength;round=0.0;if(isRound){round=1.0;}else if(miterLength>l+k){offset=halfWidth*tmpNormal*direction;}} bool miterDown(out vec2 offset,in vec4 projPos,in mat4 offsetMatrix,in float direction){bool degenerate=false;vec2 tangent=normalize(normalize(f-e)+normalize(e-d));vec2 normal=vec2(-tangent.y,tangent.x);vec2 dirVect=d-e;vec2 tmpNormal=normalize(vec2(-dirVect.y,dirVect.x));vec2 longOffset,shortOffset,longVertex;vec4 shortProjVertex;float halfWidth=k/2.0;if(length(f-e)>length(d-e)){longOffset=tmpNormal*direction*halfWidth;shortOffset=normalize(vec2(dirVect.y,-dirVect.x))*direction*halfWidth;longVertex=f;shortProjVertex=h*vec4(d,0.0,1.0);}else{shortOffset=tmpNormal*direction*halfWidth;longOffset=normalize(vec2(dirVect.y,-dirVect.x))*direction*halfWidth;longVertex=d;shortProjVertex=h*vec4(f,0.0,1.0);}vec4 p1=h*vec4(longVertex,0.0,1.0)+offsetMatrix*vec4(longOffset,0.0,0.0);vec4 p2=projPos+offsetMatrix*vec4(longOffset,0.0,0.0);vec4 p3=shortProjVertex+offsetMatrix*vec4(-shortOffset,0.0,0.0);vec4 p4=shortProjVertex+offsetMatrix*vec4(shortOffset,0.0,0.0);float denom=(p4.y-p3.y)*(p2.x-p1.x)-(p4.x-p3.x)*(p2.y-p1.y);float firstU=((p4.x-p3.x)*(p1.y-p3.y)-(p4.y-p3.y)*(p1.x-p3.x))/denom;float secondU=((p2.x-p1.x)*(p1.y-p3.y)-(p2.y-p1.y)*(p1.x-p3.x))/denom;float epsilon=0.000000000001;if(firstU>epsilon&&firstU<1.0-epsilon&&secondU>epsilon&&secondU<1.0-epsilon){shortProjVertex.x=p1.x+firstU*(p2.x-p1.x);shortProjVertex.y=p1.y+firstU*(p2.y-p1.y);offset=shortProjVertex.xy;degenerate=true;}else{float miterLength=abs(halfWidth/dot(normal,tmpNormal));offset=normal*direction*miterLength;}return degenerate;}void squareCap(out vec2 offset,out float round,in bool isRound,in vec2 nextP,in float turnDir,in float direction){round=0.0;vec2 dirVect=e-nextP;vec2 firstNormal=normalize(dirVect);vec2 secondNormal=vec2(turnDir*firstNormal.y*direction,-turnDir*firstNormal.x*direction);vec2 hypotenuse=normalize(firstNormal-secondNormal);vec2 normal=vec2(turnDir*hypotenuse.y*direction,-turnDir*hypotenuse.x*direction);float length=sqrt(c*c*2.0);offset=normal*length;if(isRound){round=1.0;}} void main(void){bool degenerate=false;float direction=float(sign(g));mat4 offsetMatrix=i*j;vec2 offset;vec4 projPos=h*vec4(e,0.0,1.0);bool round=nearlyEquals(mod(g,2.0),0.0);a=0.0;c=k/2.0;aVertex=projPos.xy;if(nearlyEquals(mod(g,3.0),0.0)||nearlyEquals(mod(g,17.0),0.0)){alongNormal(offset,f,1.0,direction);}else if(nearlyEquals(mod(g,5.0),0.0)||nearlyEquals(mod(g,13.0),0.0)){alongNormal(offset,d,-1.0,direction);}else if(nearlyEquals(mod(g,23.0),0.0)){miterUp(offset,a,round,direction);}else if(nearlyEquals(mod(g,19.0),0.0)){degenerate=miterDown(offset,projPos,offsetMatrix,direction);}else if(nearlyEquals(mod(g,7.0),0.0)){squareCap(offset,a,round,f,1.0,direction);}else if(nearlyEquals(mod(g,11.0),0.0)){squareCap(offset,a,round,d,-1.0,direction);}if(!degenerate){vec4 offsets=offsetMatrix*vec4(offset,0.0,0.0);gl_Position=projPos+offsets;}else{gl_Position=vec4(offset,0.0,1.0);}}');\n\n//# sourceMappingURL=defaultshader.js.map","/**\n * @module ol/render/webgl/linestringreplay/defaultshader/Locations\n */\n// This file is automatically generated, do not edit\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../../webgl.js';\n\nvar Locations = function Locations(gl, program) {\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_projectionMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_projectionMatrix' : 'h');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_offsetScaleMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_offsetScaleMatrix' : 'i');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_offsetRotateMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_offsetRotateMatrix' : 'j');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_lineWidth = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_lineWidth' : 'k');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_miterLimit = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_miterLimit' : 'l');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_opacity = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_opacity' : 'm');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_color = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_color' : 'n');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_size = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_size' : 'o');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_pixelRatio = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_pixelRatio' : 'p');\n\n  /**\n   * @type {number}\n   */\n  this.a_lastPos = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_lastPos' : 'd');\n\n  /**\n   * @type {number}\n   */\n  this.a_position = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_position' : 'e');\n\n  /**\n   * @type {number}\n   */\n  this.a_nextPos = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_nextPos' : 'f');\n\n  /**\n   * @type {number}\n   */\n  this.a_direction = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_direction' : 'g');\n\n};\n\nexport default Locations;\n\n//# sourceMappingURL=Locations.js.map","/**\n * @module ol/render/webgl/LineStringReplay\n */\nimport {getUid} from '../../util.js';\nimport {equals} from '../../array.js';\nimport {asArray} from '../../color.js';\nimport {intersects} from '../../extent.js';\nimport {linearRingIsClockwise} from '../../geom/flat/orient.js';\nimport {translate} from '../../geom/flat/transform.js';\nimport {lineStringIsClosed} from '../../geom/flat/topology.js';\nimport {isEmpty} from '../../obj.js';\nimport {DEFAULT_LINECAP, DEFAULT_LINEDASH, DEFAULT_LINEDASHOFFSET,\n  DEFAULT_LINEJOIN, DEFAULT_LINEWIDTH, DEFAULT_MITERLIMIT, DEFAULT_STROKESTYLE,\n  triangleIsCounterClockwise} from '../webgl.js';\nimport WebGLReplay from './Replay.js';\nimport {fragment, vertex} from './linestringreplay/defaultshader.js';\nimport Locations from './linestringreplay/defaultshader/Locations.js';\nimport {FLOAT} from '../../webgl.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\n\n\n/**\n * @enum {number}\n */\nvar Instruction = {\n  ROUND: 2,\n  BEGIN_LINE: 3,\n  END_LINE: 5,\n  BEGIN_LINE_CAP: 7,\n  END_LINE_CAP: 11,\n  BEVEL_FIRST: 13,\n  BEVEL_SECOND: 17,\n  MITER_BOTTOM: 19,\n  MITER_TOP: 23\n};\n\n\nvar WebGLLineStringReplay = /*@__PURE__*/(function (WebGLReplay) {\n  function WebGLLineStringReplay(tolerance, maxExtent) {\n    WebGLReplay.call(this, tolerance, maxExtent);\n\n    /**\n     * @private\n     * @type {import(\"./linestringreplay/defaultshader/Locations.js\").default}\n     */\n    this.defaultLocations_ = null;\n\n    /**\n     * @private\n     * @type {Array<Array<?>>}\n     */\n    this.styles_ = [];\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.styleIndices_ = [];\n\n    /**\n     * @private\n     * @type {{strokeColor: (Array<number>|null),\n     *         lineCap: (string|undefined),\n     *         lineDash: Array<number>,\n     *         lineDashOffset: (number|undefined),\n     *         lineJoin: (string|undefined),\n     *         lineWidth: (number|undefined),\n     *         miterLimit: (number|undefined),\n     *         changed: boolean}|null}\n     */\n    this.state_ = {\n      strokeColor: null,\n      lineCap: undefined,\n      lineDash: null,\n      lineDashOffset: undefined,\n      lineJoin: undefined,\n      lineWidth: undefined,\n      miterLimit: undefined,\n      changed: false\n    };\n\n  }\n\n  if ( WebGLReplay ) WebGLLineStringReplay.__proto__ = WebGLReplay;\n  WebGLLineStringReplay.prototype = Object.create( WebGLReplay && WebGLReplay.prototype );\n  WebGLLineStringReplay.prototype.constructor = WebGLLineStringReplay;\n\n  /**\n   * Draw one segment.\n   * @private\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   */\n  WebGLLineStringReplay.prototype.drawCoordinates_ = function drawCoordinates_ (flatCoordinates, offset, end, stride) {\n\n    var i, ii;\n    var numVertices = this.vertices.length;\n    var numIndices = this.indices.length;\n    //To save a vertex, the direction of a point is a product of the sign (1 or -1), a prime from\n    //Instruction, and a rounding factor (1 or 2). If the product is even,\n    //we round it. If it is odd, we don't.\n    var lineJoin = this.state_.lineJoin === 'bevel' ? 0 :\n      this.state_.lineJoin === 'miter' ? 1 : 2;\n    var lineCap = this.state_.lineCap === 'butt' ? 0 :\n      this.state_.lineCap === 'square' ? 1 : 2;\n    var closed = lineStringIsClosed(flatCoordinates, offset, end, stride);\n    var startCoords, sign, n;\n    var lastIndex = numIndices;\n    var lastSign = 1;\n    //We need the adjacent vertices to define normals in joins. p0 = last, p1 = current, p2 = next.\n    var p0, p1, p2;\n\n    for (i = offset, ii = end; i < ii; i += stride) {\n\n      n = numVertices / 7;\n\n      p0 = p1;\n      p1 = p2 || [flatCoordinates[i], flatCoordinates[i + 1]];\n      //First vertex.\n      if (i === offset) {\n        p2 = [flatCoordinates[i + stride], flatCoordinates[i + stride + 1]];\n        if (end - offset === stride * 2 && equals(p1, p2)) {\n          break;\n        }\n        if (closed) {\n          //A closed line! Complete the circle.\n          p0 = [flatCoordinates[end - stride * 2],\n            flatCoordinates[end - stride * 2 + 1]];\n\n          startCoords = p2;\n        } else {\n          //Add the first two/four vertices.\n\n          if (lineCap) {\n            numVertices = this.addVertices_([0, 0], p1, p2,\n              lastSign * Instruction.BEGIN_LINE_CAP * lineCap, numVertices);\n\n            numVertices = this.addVertices_([0, 0], p1, p2,\n              -lastSign * Instruction.BEGIN_LINE_CAP * lineCap, numVertices);\n\n            this.indices[numIndices++] = n + 2;\n            this.indices[numIndices++] = n;\n            this.indices[numIndices++] = n + 1;\n\n            this.indices[numIndices++] = n + 1;\n            this.indices[numIndices++] = n + 3;\n            this.indices[numIndices++] = n + 2;\n\n          }\n\n          numVertices = this.addVertices_([0, 0], p1, p2,\n            lastSign * Instruction.BEGIN_LINE * (lineCap || 1), numVertices);\n\n          numVertices = this.addVertices_([0, 0], p1, p2,\n            -lastSign * Instruction.BEGIN_LINE * (lineCap || 1), numVertices);\n\n          lastIndex = numVertices / 7 - 1;\n\n          continue;\n        }\n      } else if (i === end - stride) {\n        //Last vertex.\n        if (closed) {\n          //Same as the first vertex.\n          p2 = startCoords;\n          break;\n        } else {\n          p0 = p0 || [0, 0];\n\n          numVertices = this.addVertices_(p0, p1, [0, 0],\n            lastSign * Instruction.END_LINE * (lineCap || 1), numVertices);\n\n          numVertices = this.addVertices_(p0, p1, [0, 0],\n            -lastSign * Instruction.END_LINE * (lineCap || 1), numVertices);\n\n          this.indices[numIndices++] = n;\n          this.indices[numIndices++] = lastIndex - 1;\n          this.indices[numIndices++] = lastIndex;\n\n          this.indices[numIndices++] = lastIndex;\n          this.indices[numIndices++] = n + 1;\n          this.indices[numIndices++] = n;\n\n          if (lineCap) {\n            numVertices = this.addVertices_(p0, p1, [0, 0],\n              lastSign * Instruction.END_LINE_CAP * lineCap, numVertices);\n\n            numVertices = this.addVertices_(p0, p1, [0, 0],\n              -lastSign * Instruction.END_LINE_CAP * lineCap, numVertices);\n\n            this.indices[numIndices++] = n + 2;\n            this.indices[numIndices++] = n;\n            this.indices[numIndices++] = n + 1;\n\n            this.indices[numIndices++] = n + 1;\n            this.indices[numIndices++] = n + 3;\n            this.indices[numIndices++] = n + 2;\n\n          }\n\n          break;\n        }\n      } else {\n        p2 = [flatCoordinates[i + stride], flatCoordinates[i + stride + 1]];\n      }\n\n      // We group CW and straight lines, thus the not so inituitive CCW checking function.\n      sign = triangleIsCounterClockwise(p0[0], p0[1], p1[0], p1[1], p2[0], p2[1])\n        ? -1 : 1;\n\n      numVertices = this.addVertices_(p0, p1, p2,\n        sign * Instruction.BEVEL_FIRST * (lineJoin || 1), numVertices);\n\n      numVertices = this.addVertices_(p0, p1, p2,\n        sign * Instruction.BEVEL_SECOND * (lineJoin || 1), numVertices);\n\n      numVertices = this.addVertices_(p0, p1, p2,\n        -sign * Instruction.MITER_BOTTOM * (lineJoin || 1), numVertices);\n\n      if (i > offset) {\n        this.indices[numIndices++] = n;\n        this.indices[numIndices++] = lastIndex - 1;\n        this.indices[numIndices++] = lastIndex;\n\n        this.indices[numIndices++] = n + 2;\n        this.indices[numIndices++] = n;\n        this.indices[numIndices++] = lastSign * sign > 0 ? lastIndex : lastIndex - 1;\n      }\n\n      this.indices[numIndices++] = n;\n      this.indices[numIndices++] = n + 2;\n      this.indices[numIndices++] = n + 1;\n\n      lastIndex = n + 2;\n      lastSign = sign;\n\n      //Add miter\n      if (lineJoin) {\n        numVertices = this.addVertices_(p0, p1, p2,\n          sign * Instruction.MITER_TOP * lineJoin, numVertices);\n\n        this.indices[numIndices++] = n + 1;\n        this.indices[numIndices++] = n + 3;\n        this.indices[numIndices++] = n;\n      }\n    }\n\n    if (closed) {\n      n = n || numVertices / 7;\n      sign = linearRingIsClockwise([p0[0], p0[1], p1[0], p1[1], p2[0], p2[1]], 0, 6, 2)\n        ? 1 : -1;\n\n      numVertices = this.addVertices_(p0, p1, p2,\n        sign * Instruction.BEVEL_FIRST * (lineJoin || 1), numVertices);\n\n      numVertices = this.addVertices_(p0, p1, p2,\n        -sign * Instruction.MITER_BOTTOM * (lineJoin || 1), numVertices);\n\n      this.indices[numIndices++] = n;\n      this.indices[numIndices++] = lastIndex - 1;\n      this.indices[numIndices++] = lastIndex;\n\n      this.indices[numIndices++] = n + 1;\n      this.indices[numIndices++] = n;\n      this.indices[numIndices++] = lastSign * sign > 0 ? lastIndex : lastIndex - 1;\n    }\n  };\n\n  /**\n   * @param {Array<number>} p0 Last coordinates.\n   * @param {Array<number>} p1 Current coordinates.\n   * @param {Array<number>} p2 Next coordinates.\n   * @param {number} product Sign, instruction, and rounding product.\n   * @param {number} numVertices Vertex counter.\n   * @return {number} Vertex counter.\n   * @private\n   */\n  WebGLLineStringReplay.prototype.addVertices_ = function addVertices_ (p0, p1, p2, product, numVertices) {\n    this.vertices[numVertices++] = p0[0];\n    this.vertices[numVertices++] = p0[1];\n    this.vertices[numVertices++] = p1[0];\n    this.vertices[numVertices++] = p1[1];\n    this.vertices[numVertices++] = p2[0];\n    this.vertices[numVertices++] = p2[1];\n    this.vertices[numVertices++] = product;\n\n    return numVertices;\n  };\n\n  /**\n   * Check if the linestring can be drawn (i. e. valid).\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   * @return {boolean} The linestring can be drawn.\n   * @private\n   */\n  WebGLLineStringReplay.prototype.isValid_ = function isValid_ (flatCoordinates, offset, end, stride) {\n    var range = end - offset;\n    if (range < stride * 2) {\n      return false;\n    } else if (range === stride * 2) {\n      var firstP = [flatCoordinates[offset], flatCoordinates[offset + 1]];\n      var lastP = [flatCoordinates[offset + stride], flatCoordinates[offset + stride + 1]];\n      return !equals(firstP, lastP);\n    }\n\n    return true;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLLineStringReplay.prototype.drawLineString = function drawLineString (lineStringGeometry, feature) {\n    var flatCoordinates = lineStringGeometry.getFlatCoordinates();\n    var stride = lineStringGeometry.getStride();\n    if (this.isValid_(flatCoordinates, 0, flatCoordinates.length, stride)) {\n      flatCoordinates = translate(flatCoordinates, 0, flatCoordinates.length,\n        stride, -this.origin[0], -this.origin[1]);\n      if (this.state_.changed) {\n        this.styleIndices_.push(this.indices.length);\n        this.state_.changed = false;\n      }\n      this.startIndices.push(this.indices.length);\n      this.startIndicesFeature.push(feature);\n      this.drawCoordinates_(\n        flatCoordinates, 0, flatCoordinates.length, stride);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLLineStringReplay.prototype.drawMultiLineString = function drawMultiLineString (multiLineStringGeometry, feature) {\n    var indexCount = this.indices.length;\n    var ends = multiLineStringGeometry.getEnds();\n    ends.unshift(0);\n    var flatCoordinates = multiLineStringGeometry.getFlatCoordinates();\n    var stride = multiLineStringGeometry.getStride();\n    var i, ii;\n    if (ends.length > 1) {\n      for (i = 1, ii = ends.length; i < ii; ++i) {\n        if (this.isValid_(flatCoordinates, ends[i - 1], ends[i], stride)) {\n          var lineString = translate(flatCoordinates, ends[i - 1], ends[i],\n            stride, -this.origin[0], -this.origin[1]);\n          this.drawCoordinates_(\n            lineString, 0, lineString.length, stride);\n        }\n      }\n    }\n    if (this.indices.length > indexCount) {\n      this.startIndices.push(indexCount);\n      this.startIndicesFeature.push(feature);\n      if (this.state_.changed) {\n        this.styleIndices_.push(indexCount);\n        this.state_.changed = false;\n      }\n    }\n  };\n\n  /**\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {Array<Array<number>>} holeFlatCoordinates Hole flat coordinates.\n   * @param {number} stride Stride.\n   */\n  WebGLLineStringReplay.prototype.drawPolygonCoordinates = function drawPolygonCoordinates (flatCoordinates, holeFlatCoordinates, stride) {\n    if (!lineStringIsClosed(flatCoordinates, 0, flatCoordinates.length, stride)) {\n      flatCoordinates.push(flatCoordinates[0]);\n      flatCoordinates.push(flatCoordinates[1]);\n    }\n    this.drawCoordinates_(flatCoordinates, 0, flatCoordinates.length, stride);\n    if (holeFlatCoordinates.length) {\n      var i, ii;\n      for (i = 0, ii = holeFlatCoordinates.length; i < ii; ++i) {\n        if (!lineStringIsClosed(holeFlatCoordinates[i], 0, holeFlatCoordinates[i].length, stride)) {\n          holeFlatCoordinates[i].push(holeFlatCoordinates[i][0]);\n          holeFlatCoordinates[i].push(holeFlatCoordinates[i][1]);\n        }\n        this.drawCoordinates_(holeFlatCoordinates[i], 0,\n          holeFlatCoordinates[i].length, stride);\n      }\n    }\n  };\n\n  /**\n   * @param {import(\"../../Feature.js\").default|import(\"../Feature.js\").default} feature Feature.\n   * @param {number=} opt_index Index count.\n   */\n  WebGLLineStringReplay.prototype.setPolygonStyle = function setPolygonStyle (feature, opt_index) {\n    var index = opt_index === undefined ? this.indices.length : opt_index;\n    this.startIndices.push(index);\n    this.startIndicesFeature.push(feature);\n    if (this.state_.changed) {\n      this.styleIndices_.push(index);\n      this.state_.changed = false;\n    }\n  };\n\n  /**\n   * @return {number} Current index.\n   */\n  WebGLLineStringReplay.prototype.getCurrentIndex = function getCurrentIndex () {\n    return this.indices.length;\n  };\n\n  /**\n   * @inheritDoc\n   **/\n  WebGLLineStringReplay.prototype.finish = function finish (context) {\n    // create, bind, and populate the vertices buffer\n    this.verticesBuffer = new WebGLBuffer(this.vertices);\n\n    // create, bind, and populate the indices buffer\n    this.indicesBuffer = new WebGLBuffer(this.indices);\n\n    this.startIndices.push(this.indices.length);\n\n    //Clean up, if there is nothing to draw\n    if (this.styleIndices_.length === 0 && this.styles_.length > 0) {\n      this.styles_ = [];\n    }\n\n    this.vertices = null;\n    this.indices = null;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLLineStringReplay.prototype.getDeleteResourcesFunction = function getDeleteResourcesFunction (context) {\n    var verticesBuffer = this.verticesBuffer;\n    var indicesBuffer = this.indicesBuffer;\n    return function() {\n      context.deleteBuffer(verticesBuffer);\n      context.deleteBuffer(indicesBuffer);\n    };\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLLineStringReplay.prototype.setUpProgram = function setUpProgram (gl, context, size, pixelRatio) {\n    // get the program\n    var program = context.getProgram(fragment, vertex);\n\n    // get the locations\n    var locations;\n    if (!this.defaultLocations_) {\n      locations = new Locations(gl, program);\n      this.defaultLocations_ = locations;\n    } else {\n      locations = this.defaultLocations_;\n    }\n\n    context.useProgram(program);\n\n    // enable the vertex attrib arrays\n    gl.enableVertexAttribArray(locations.a_lastPos);\n    gl.vertexAttribPointer(locations.a_lastPos, 2, FLOAT,\n      false, 28, 0);\n\n    gl.enableVertexAttribArray(locations.a_position);\n    gl.vertexAttribPointer(locations.a_position, 2, FLOAT,\n      false, 28, 8);\n\n    gl.enableVertexAttribArray(locations.a_nextPos);\n    gl.vertexAttribPointer(locations.a_nextPos, 2, FLOAT,\n      false, 28, 16);\n\n    gl.enableVertexAttribArray(locations.a_direction);\n    gl.vertexAttribPointer(locations.a_direction, 1, FLOAT,\n      false, 28, 24);\n\n    // Enable renderer specific uniforms.\n    gl.uniform2fv(locations.u_size, size);\n    gl.uniform1f(locations.u_pixelRatio, pixelRatio);\n\n    return locations;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLLineStringReplay.prototype.shutDownProgram = function shutDownProgram (gl, locations) {\n    gl.disableVertexAttribArray(locations.a_lastPos);\n    gl.disableVertexAttribArray(locations.a_position);\n    gl.disableVertexAttribArray(locations.a_nextPos);\n    gl.disableVertexAttribArray(locations.a_direction);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLLineStringReplay.prototype.drawReplay = function drawReplay (gl, context, skippedFeaturesHash, hitDetection) {\n    //Save GL parameters.\n    var tmpDepthFunc = /** @type {number} */ (gl.getParameter(gl.DEPTH_FUNC));\n    var tmpDepthMask = /** @type {boolean} */ (gl.getParameter(gl.DEPTH_WRITEMASK));\n\n    if (!hitDetection) {\n      gl.enable(gl.DEPTH_TEST);\n      gl.depthMask(true);\n      gl.depthFunc(gl.NOTEQUAL);\n    }\n\n    if (!isEmpty(skippedFeaturesHash)) {\n      this.drawReplaySkipping_(gl, context, skippedFeaturesHash);\n    } else {\n      //Draw by style groups to minimize drawElements() calls.\n      var i, start, end, nextStyle;\n      end = this.startIndices[this.startIndices.length - 1];\n      for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n        start = this.styleIndices_[i];\n        nextStyle = this.styles_[i];\n        this.setStrokeStyle_(gl, nextStyle[0], nextStyle[1], nextStyle[2]);\n        this.drawElements(gl, context, start, end);\n        gl.clear(gl.DEPTH_BUFFER_BIT);\n        end = start;\n      }\n    }\n    if (!hitDetection) {\n      gl.disable(gl.DEPTH_TEST);\n      gl.clear(gl.DEPTH_BUFFER_BIT);\n      //Restore GL parameters.\n      gl.depthMask(tmpDepthMask);\n      gl.depthFunc(tmpDepthFunc);\n    }\n  };\n\n  /**\n   * @private\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {Object} skippedFeaturesHash Ids of features to skip.\n   */\n  WebGLLineStringReplay.prototype.drawReplaySkipping_ = function drawReplaySkipping_ (gl, context, skippedFeaturesHash) {\n    var i, start, end, nextStyle, groupStart, feature, featureIndex, featureStart;\n    featureIndex = this.startIndices.length - 2;\n    end = start = this.startIndices[featureIndex + 1];\n    for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n      nextStyle = this.styles_[i];\n      this.setStrokeStyle_(gl, nextStyle[0], nextStyle[1], nextStyle[2]);\n      groupStart = this.styleIndices_[i];\n\n      while (featureIndex >= 0 &&\n          this.startIndices[featureIndex] >= groupStart) {\n        featureStart = this.startIndices[featureIndex];\n        feature = this.startIndicesFeature[featureIndex];\n\n        if (skippedFeaturesHash[getUid(feature)]) {\n          if (start !== end) {\n            this.drawElements(gl, context, start, end);\n            gl.clear(gl.DEPTH_BUFFER_BIT);\n          }\n          end = featureStart;\n        }\n        featureIndex--;\n        start = featureStart;\n      }\n      if (start !== end) {\n        this.drawElements(gl, context, start, end);\n        gl.clear(gl.DEPTH_BUFFER_BIT);\n      }\n      start = end = groupStart;\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLLineStringReplay.prototype.drawHitDetectionReplayOneByOne = function drawHitDetectionReplayOneByOne (gl, context, skippedFeaturesHash, featureCallback, opt_hitExtent) {\n    var i, start, end, nextStyle, groupStart, feature, featureIndex;\n    featureIndex = this.startIndices.length - 2;\n    end = this.startIndices[featureIndex + 1];\n    for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n      nextStyle = this.styles_[i];\n      this.setStrokeStyle_(gl, nextStyle[0], nextStyle[1], nextStyle[2]);\n      groupStart = this.styleIndices_[i];\n\n      while (featureIndex >= 0 &&\n          this.startIndices[featureIndex] >= groupStart) {\n        start = this.startIndices[featureIndex];\n        feature = this.startIndicesFeature[featureIndex];\n\n        if (skippedFeaturesHash[getUid(feature)] === undefined &&\n            feature.getGeometry() &&\n            (opt_hitExtent === undefined || intersects(\n              /** @type {Array<number>} */ (opt_hitExtent),\n              feature.getGeometry().getExtent()))) {\n          gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);\n          this.drawElements(gl, context, start, end);\n\n          var result = featureCallback(feature);\n\n          if (result) {\n            return result;\n          }\n\n        }\n        featureIndex--;\n        end = start;\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * @private\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {Array<number>} color Color.\n   * @param {number} lineWidth Line width.\n   * @param {number} miterLimit Miter limit.\n   */\n  WebGLLineStringReplay.prototype.setStrokeStyle_ = function setStrokeStyle_ (gl, color, lineWidth, miterLimit) {\n    gl.uniform4fv(this.defaultLocations_.u_color, color);\n    gl.uniform1f(this.defaultLocations_.u_lineWidth, lineWidth);\n    gl.uniform1f(this.defaultLocations_.u_miterLimit, miterLimit);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLLineStringReplay.prototype.setFillStrokeStyle = function setFillStrokeStyle (fillStyle, strokeStyle) {\n    var strokeStyleLineCap = strokeStyle.getLineCap();\n    this.state_.lineCap = strokeStyleLineCap !== undefined ?\n      strokeStyleLineCap : DEFAULT_LINECAP;\n    var strokeStyleLineDash = strokeStyle.getLineDash();\n    this.state_.lineDash = strokeStyleLineDash ?\n      strokeStyleLineDash : DEFAULT_LINEDASH;\n    var strokeStyleLineDashOffset = strokeStyle.getLineDashOffset();\n    this.state_.lineDashOffset = strokeStyleLineDashOffset ?\n      strokeStyleLineDashOffset : DEFAULT_LINEDASHOFFSET;\n    var strokeStyleLineJoin = strokeStyle.getLineJoin();\n    this.state_.lineJoin = strokeStyleLineJoin !== undefined ?\n      strokeStyleLineJoin : DEFAULT_LINEJOIN;\n    var strokeStyleColor = strokeStyle.getColor();\n    if (!(strokeStyleColor instanceof CanvasGradient) &&\n        !(strokeStyleColor instanceof CanvasPattern)) {\n      strokeStyleColor = asArray(strokeStyleColor).map(function(c, i) {\n        return i != 3 ? c / 255 : c;\n      }) || DEFAULT_STROKESTYLE;\n    } else {\n      strokeStyleColor = DEFAULT_STROKESTYLE;\n    }\n    var strokeStyleWidth = strokeStyle.getWidth();\n    strokeStyleWidth = strokeStyleWidth !== undefined ?\n      strokeStyleWidth : DEFAULT_LINEWIDTH;\n    var strokeStyleMiterLimit = strokeStyle.getMiterLimit();\n    strokeStyleMiterLimit = strokeStyleMiterLimit !== undefined ?\n      strokeStyleMiterLimit : DEFAULT_MITERLIMIT;\n    if (!this.state_.strokeColor || !equals(this.state_.strokeColor, strokeStyleColor) ||\n        this.state_.lineWidth !== strokeStyleWidth || this.state_.miterLimit !== strokeStyleMiterLimit) {\n      this.state_.changed = true;\n      this.state_.strokeColor = strokeStyleColor;\n      this.state_.lineWidth = strokeStyleWidth;\n      this.state_.miterLimit = strokeStyleMiterLimit;\n      this.styles_.push([strokeStyleColor, strokeStyleWidth, strokeStyleMiterLimit]);\n    }\n  };\n\n  return WebGLLineStringReplay;\n}(WebGLReplay));\n\n\nexport default WebGLLineStringReplay;\n\n//# sourceMappingURL=LineStringReplay.js.map","/**\n * @module ol/render/webgl/polygonreplay/defaultshader\n */\n// This file is automatically generated, do not edit.\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../webgl.js';\nimport WebGLFragment from '../../../webgl/Fragment.js';\nimport WebGLVertex from '../../../webgl/Vertex.js';\n\nexport var fragment = new WebGLFragment(DEBUG_WEBGL ?\n  'precision mediump float;\\n\\n\\n\\nuniform vec4 u_color;\\nuniform float u_opacity;\\n\\nvoid main(void) {\\n  gl_FragColor = u_color;\\n  float alpha = u_color.a * u_opacity;\\n  if (alpha == 0.0) {\\n    discard;\\n  }\\n  gl_FragColor.a = alpha;\\n}\\n' :\n  'precision mediump float;uniform vec4 e;uniform float f;void main(void){gl_FragColor=e;float alpha=e.a*f;if(alpha==0.0){discard;}gl_FragColor.a=alpha;}');\n\nexport var vertex = new WebGLVertex(DEBUG_WEBGL ?\n  '\\n\\nattribute vec2 a_position;\\n\\nuniform mat4 u_projectionMatrix;\\nuniform mat4 u_offsetScaleMatrix;\\nuniform mat4 u_offsetRotateMatrix;\\n\\nvoid main(void) {\\n  gl_Position = u_projectionMatrix * vec4(a_position, 0.0, 1.0);\\n}\\n\\n\\n' :\n  'attribute vec2 a;uniform mat4 b;uniform mat4 c;uniform mat4 d;void main(void){gl_Position=b*vec4(a,0.0,1.0);}');\n\n//# sourceMappingURL=defaultshader.js.map","/**\n * @module ol/render/webgl/polygonreplay/defaultshader/Locations\n */\n// This file is automatically generated, do not edit\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../../webgl.js';\n\nvar Locations = function Locations(gl, program) {\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_projectionMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_projectionMatrix' : 'b');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_offsetScaleMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_offsetScaleMatrix' : 'c');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_offsetRotateMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_offsetRotateMatrix' : 'd');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_color = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_color' : 'e');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_opacity = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_opacity' : 'f');\n\n  /**\n   * @type {number}\n   */\n  this.a_position = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_position' : 'a');\n\n};\n\nexport default Locations;\n\n//# sourceMappingURL=Locations.js.map","/**\n * @module ol/style/Stroke\n */\nimport {getUid} from '../util.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} [color] A color, gradient or pattern.\n * See {@link module:ol/color~Color} and {@link module:ol/colorlike~ColorLike} for possible formats.\n * Default null; if null, the Canvas/renderer default black will be used.\n * @property {string} [lineCap='round'] Line cap style: `butt`, `round`, or `square`.\n * @property {string} [lineJoin='round'] Line join style: `bevel`, `round`, or `miter`.\n * @property {Array<number>} [lineDash] Line dash pattern. Default is `undefined` (no dash).\n * Please note that Internet Explorer 10 and lower do not support the `setLineDash` method on\n * the `CanvasRenderingContext2D` and therefore this option will have no visual effect in these browsers.\n * @property {number} [lineDashOffset=0] Line dash offset.\n * @property {number} [miterLimit=10] Miter limit.\n * @property {number} [width] Width.\n */\n\n\n/**\n * @classdesc\n * Set stroke style for vector features.\n * Note that the defaults given are the Canvas defaults, which will be used if\n * option is not defined. The `get` functions return whatever was entered in\n * the options; they will not return the default.\n * @api\n */\nvar Stroke = function Stroke(opt_options) {\n\n  var options = opt_options || {};\n\n  /**\n   * @private\n   * @type {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike}\n   */\n  this.color_ = options.color !== undefined ? options.color : null;\n\n  /**\n   * @private\n   * @type {string|undefined}\n   */\n  this.lineCap_ = options.lineCap;\n\n  /**\n   * @private\n   * @type {Array<number>}\n   */\n  this.lineDash_ = options.lineDash !== undefined ? options.lineDash : null;\n\n  /**\n   * @private\n   * @type {number|undefined}\n   */\n  this.lineDashOffset_ = options.lineDashOffset;\n\n  /**\n   * @private\n   * @type {string|undefined}\n   */\n  this.lineJoin_ = options.lineJoin;\n\n  /**\n   * @private\n   * @type {number|undefined}\n   */\n  this.miterLimit_ = options.miterLimit;\n\n  /**\n   * @private\n   * @type {number|undefined}\n   */\n  this.width_ = options.width;\n\n  /**\n   * @private\n   * @type {string|undefined}\n   */\n  this.checksum_ = undefined;\n};\n\n/**\n * Clones the style.\n * @return {Stroke} The cloned style.\n * @api\n */\nStroke.prototype.clone = function clone () {\n  var color = this.getColor();\n  return new Stroke({\n    color: Array.isArray(color) ? color.slice() : color || undefined,\n    lineCap: this.getLineCap(),\n    lineDash: this.getLineDash() ? this.getLineDash().slice() : undefined,\n    lineDashOffset: this.getLineDashOffset(),\n    lineJoin: this.getLineJoin(),\n    miterLimit: this.getMiterLimit(),\n    width: this.getWidth()\n  });\n};\n\n/**\n * Get the stroke color.\n * @return {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} Color.\n * @api\n */\nStroke.prototype.getColor = function getColor () {\n  return this.color_;\n};\n\n/**\n * Get the line cap type for the stroke.\n * @return {string|undefined} Line cap.\n * @api\n */\nStroke.prototype.getLineCap = function getLineCap () {\n  return this.lineCap_;\n};\n\n/**\n * Get the line dash style for the stroke.\n * @return {Array<number>} Line dash.\n * @api\n */\nStroke.prototype.getLineDash = function getLineDash () {\n  return this.lineDash_;\n};\n\n/**\n * Get the line dash offset for the stroke.\n * @return {number|undefined} Line dash offset.\n * @api\n */\nStroke.prototype.getLineDashOffset = function getLineDashOffset () {\n  return this.lineDashOffset_;\n};\n\n/**\n * Get the line join type for the stroke.\n * @return {string|undefined} Line join.\n * @api\n */\nStroke.prototype.getLineJoin = function getLineJoin () {\n  return this.lineJoin_;\n};\n\n/**\n * Get the miter limit for the stroke.\n * @return {number|undefined} Miter limit.\n * @api\n */\nStroke.prototype.getMiterLimit = function getMiterLimit () {\n  return this.miterLimit_;\n};\n\n/**\n * Get the stroke width.\n * @return {number|undefined} Width.\n * @api\n */\nStroke.prototype.getWidth = function getWidth () {\n  return this.width_;\n};\n\n/**\n * Set the color.\n *\n * @param {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} color Color.\n * @api\n */\nStroke.prototype.setColor = function setColor (color) {\n  this.color_ = color;\n  this.checksum_ = undefined;\n};\n\n/**\n * Set the line cap.\n *\n * @param {string|undefined} lineCap Line cap.\n * @api\n */\nStroke.prototype.setLineCap = function setLineCap (lineCap) {\n  this.lineCap_ = lineCap;\n  this.checksum_ = undefined;\n};\n\n/**\n * Set the line dash.\n *\n * Please note that Internet Explorer 10 and lower [do not support][mdn] the\n * `setLineDash` method on the `CanvasRenderingContext2D` and therefore this\n * property will have no visual effect in these browsers.\n *\n * [mdn]: https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/setLineDash#Browser_compatibility\n *\n * @param {Array<number>} lineDash Line dash.\n * @api\n */\nStroke.prototype.setLineDash = function setLineDash (lineDash) {\n  this.lineDash_ = lineDash;\n  this.checksum_ = undefined;\n};\n\n/**\n * Set the line dash offset.\n *\n * @param {number|undefined} lineDashOffset Line dash offset.\n * @api\n */\nStroke.prototype.setLineDashOffset = function setLineDashOffset (lineDashOffset) {\n  this.lineDashOffset_ = lineDashOffset;\n  this.checksum_ = undefined;\n};\n\n/**\n * Set the line join.\n *\n * @param {string|undefined} lineJoin Line join.\n * @api\n */\nStroke.prototype.setLineJoin = function setLineJoin (lineJoin) {\n  this.lineJoin_ = lineJoin;\n  this.checksum_ = undefined;\n};\n\n/**\n * Set the miter limit.\n *\n * @param {number|undefined} miterLimit Miter limit.\n * @api\n */\nStroke.prototype.setMiterLimit = function setMiterLimit (miterLimit) {\n  this.miterLimit_ = miterLimit;\n  this.checksum_ = undefined;\n};\n\n/**\n * Set the width.\n *\n * @param {number|undefined} width Width.\n * @api\n */\nStroke.prototype.setWidth = function setWidth (width) {\n  this.width_ = width;\n  this.checksum_ = undefined;\n};\n\n/**\n * @return {string} The checksum.\n */\nStroke.prototype.getChecksum = function getChecksum () {\n  if (this.checksum_ === undefined) {\n    this.checksum_ = 's';\n    if (this.color_) {\n      if (typeof this.color_ === 'string') {\n        this.checksum_ += this.color_;\n      } else {\n        this.checksum_ += getUid(this.color_);\n      }\n    } else {\n      this.checksum_ += '-';\n    }\n    this.checksum_ += ',' +\n        (this.lineCap_ !== undefined ?\n          this.lineCap_.toString() : '-') + ',' +\n        (this.lineDash_ ?\n          this.lineDash_.toString() : '-') + ',' +\n        (this.lineDashOffset_ !== undefined ?\n          this.lineDashOffset_ : '-') + ',' +\n        (this.lineJoin_ !== undefined ?\n          this.lineJoin_ : '-') + ',' +\n        (this.miterLimit_ !== undefined ?\n          this.miterLimit_.toString() : '-') + ',' +\n        (this.width_ !== undefined ?\n          this.width_.toString() : '-');\n  }\n\n  return this.checksum_;\n};\n\nexport default Stroke;\n\n//# sourceMappingURL=Stroke.js.map","/**\n * @module ol/structs/LinkedList\n */\n\n\n/**\n * @typedef {Object} Item\n * @property {Item} [prev]\n * @property {Item} [next]\n * @property {?} data\n */\n\n/**\n * @classdesc\n * Creates an empty linked list structure.\n */\nvar LinkedList = function LinkedList(opt_circular) {\n\n  /**\n   * @private\n   * @type {Item|undefined}\n   */\n  this.first_;\n\n  /**\n   * @private\n   * @type {Item|undefined}\n   */\n  this.last_;\n\n  /**\n   * @private\n   * @type {Item|undefined}\n   */\n  this.head_;\n\n  /**\n   * @private\n   * @type {boolean}\n   */\n  this.circular_ = opt_circular === undefined ? true : opt_circular;\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.length_ = 0;\n\n};\n\n/**\n * Inserts an item into the linked list right after the current one.\n *\n * @param {?} data Item data.\n */\nLinkedList.prototype.insertItem = function insertItem (data) {\n\n  /** @type {Item} */\n  var item = {\n    prev: undefined,\n    next: undefined,\n    data: data\n  };\n\n  var head = this.head_;\n\n  //Initialize the list.\n  if (!head) {\n    this.first_ = item;\n    this.last_ = item;\n    if (this.circular_) {\n      item.next = item;\n      item.prev = item;\n    }\n  } else {\n    //Link the new item to the adjacent ones.\n    var next = head.next;\n    item.prev = head;\n    item.next = next;\n    head.next = item;\n    if (next) {\n      next.prev = item;\n    }\n\n    if (head === this.last_) {\n      this.last_ = item;\n    }\n  }\n  this.head_ = item;\n  this.length_++;\n};\n\n/**\n * Removes the current item from the list. Sets the cursor to the next item,\n * if possible.\n */\nLinkedList.prototype.removeItem = function removeItem () {\n  var head = this.head_;\n  if (head) {\n    var next = head.next;\n    var prev = head.prev;\n    if (next) {\n      next.prev = prev;\n    }\n    if (prev) {\n      prev.next = next;\n    }\n    this.head_ = next || prev;\n\n    if (this.first_ === this.last_) {\n      this.head_ = undefined;\n      this.first_ = undefined;\n      this.last_ = undefined;\n    } else if (this.first_ === head) {\n      this.first_ = this.head_;\n    } else if (this.last_ === head) {\n      this.last_ = prev ? this.head_.prev : this.head_;\n    }\n    this.length_--;\n  }\n};\n\n/**\n * Sets the cursor to the first item, and returns the associated data.\n *\n * @return {?} Item data.\n */\nLinkedList.prototype.firstItem = function firstItem () {\n  this.head_ = this.first_;\n  if (this.head_) {\n    return this.head_.data;\n  }\n  return undefined;\n};\n\n/**\n* Sets the cursor to the last item, and returns the associated data.\n*\n* @return {?} Item data.\n*/\nLinkedList.prototype.lastItem = function lastItem () {\n  this.head_ = this.last_;\n  if (this.head_) {\n    return this.head_.data;\n  }\n  return undefined;\n};\n\n/**\n * Sets the cursor to the next item, and returns the associated data.\n *\n * @return {?} Item data.\n */\nLinkedList.prototype.nextItem = function nextItem () {\n  if (this.head_ && this.head_.next) {\n    this.head_ = this.head_.next;\n    return this.head_.data;\n  }\n  return undefined;\n};\n\n/**\n * Returns the next item's data without moving the cursor.\n *\n * @return {?} Item data.\n */\nLinkedList.prototype.getNextItem = function getNextItem () {\n  if (this.head_ && this.head_.next) {\n    return this.head_.next.data;\n  }\n  return undefined;\n};\n\n/**\n * Sets the cursor to the previous item, and returns the associated data.\n *\n * @return {?} Item data.\n */\nLinkedList.prototype.prevItem = function prevItem () {\n  if (this.head_ && this.head_.prev) {\n    this.head_ = this.head_.prev;\n    return this.head_.data;\n  }\n  return undefined;\n};\n\n/**\n * Returns the previous item's data without moving the cursor.\n *\n * @return {?} Item data.\n */\nLinkedList.prototype.getPrevItem = function getPrevItem () {\n  if (this.head_ && this.head_.prev) {\n    return this.head_.prev.data;\n  }\n  return undefined;\n};\n\n/**\n * Returns the current item's data.\n *\n * @return {?} Item data.\n */\nLinkedList.prototype.getCurrItem = function getCurrItem () {\n  if (this.head_) {\n    return this.head_.data;\n  }\n  return undefined;\n};\n\n/**\n * Sets the first item of the list. This only works for circular lists, and sets\n * the last item accordingly.\n */\nLinkedList.prototype.setFirstItem = function setFirstItem () {\n  if (this.circular_ && this.head_) {\n    this.first_ = this.head_;\n    this.last_ = this.head_.prev;\n  }\n};\n\n/**\n * Concatenates two lists.\n * @param {LinkedList} list List to merge into the current list.\n */\nLinkedList.prototype.concat = function concat (list) {\n  if (list.head_) {\n    if (this.head_) {\n      var end = this.head_.next;\n      this.head_.next = list.first_;\n      list.first_.prev = this.head_;\n      end.prev = list.last_;\n      list.last_.next = end;\n      this.length_ += list.length_;\n    } else {\n      this.head_ = list.head_;\n      this.first_ = list.first_;\n      this.last_ = list.last_;\n      this.length_ = list.length_;\n    }\n    list.head_ = undefined;\n    list.first_ = undefined;\n    list.last_ = undefined;\n    list.length_ = 0;\n  }\n};\n\n/**\n * Returns the current length of the list.\n *\n * @return {number} Length.\n */\nLinkedList.prototype.getLength = function getLength () {\n  return this.length_;\n};\n\n\nexport default LinkedList;\n\n//# sourceMappingURL=LinkedList.js.map","/**\n * @module ol/structs/RBush\n */\nimport {getUid} from '../util.js';\nimport rbush from 'rbush';\nimport {createOrUpdate, equals} from '../extent.js';\nimport {isEmpty} from '../obj.js';\n\n/**\n * @typedef {Object} Entry\n * @property {number} minX\n * @property {number} minY\n * @property {number} maxX\n * @property {number} maxY\n * @property {Object} [value]\n */\n\n/**\n * @classdesc\n * Wrapper around the RBush by Vladimir Agafonkin.\n * See https://github.com/mourner/rbush.\n *\n * @template T\n */\nvar RBush = function RBush(opt_maxEntries) {\n\n  /**\n   * @private\n   */\n  this.rbush_ = rbush(opt_maxEntries, undefined);\n\n  /**\n   * A mapping between the objects added to this rbush wrapper\n   * and the objects that are actually added to the internal rbush.\n   * @private\n   * @type {Object<string, Entry>}\n   */\n  this.items_ = {};\n\n};\n\n/**\n * Insert a value into the RBush.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {T} value Value.\n */\nRBush.prototype.insert = function insert (extent, value) {\n  /** @type {Entry} */\n  var item = {\n    minX: extent[0],\n    minY: extent[1],\n    maxX: extent[2],\n    maxY: extent[3],\n    value: value\n  };\n\n  this.rbush_.insert(item);\n  this.items_[getUid(value)] = item;\n};\n\n\n/**\n * Bulk-insert values into the RBush.\n * @param {Array<import(\"../extent.js\").Extent>} extents Extents.\n * @param {Array<T>} values Values.\n */\nRBush.prototype.load = function load (extents, values) {\n  var items = new Array(values.length);\n  for (var i = 0, l = values.length; i < l; i++) {\n    var extent = extents[i];\n    var value = values[i];\n\n    /** @type {Entry} */\n    var item = {\n      minX: extent[0],\n      minY: extent[1],\n      maxX: extent[2],\n      maxY: extent[3],\n      value: value\n    };\n    items[i] = item;\n    this.items_[getUid(value)] = item;\n  }\n  this.rbush_.load(items);\n};\n\n\n/**\n * Remove a value from the RBush.\n * @param {T} value Value.\n * @return {boolean} Removed.\n */\nRBush.prototype.remove = function remove (value) {\n  var uid = getUid(value);\n\n  // get the object in which the value was wrapped when adding to the\n  // internal rbush. then use that object to do the removal.\n  var item = this.items_[uid];\n  delete this.items_[uid];\n  return this.rbush_.remove(item) !== null;\n};\n\n\n/**\n * Update the extent of a value in the RBush.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {T} value Value.\n */\nRBush.prototype.update = function update (extent, value) {\n  var item = this.items_[getUid(value)];\n  var bbox = [item.minX, item.minY, item.maxX, item.maxY];\n  if (!equals(bbox, extent)) {\n    this.remove(value);\n    this.insert(extent, value);\n  }\n};\n\n\n/**\n * Return all values in the RBush.\n * @return {Array<T>} All.\n */\nRBush.prototype.getAll = function getAll () {\n  var items = this.rbush_.all();\n  return items.map(function(item) {\n    return item.value;\n  });\n};\n\n\n/**\n * Return all values in the given extent.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @return {Array<T>} All in extent.\n */\nRBush.prototype.getInExtent = function getInExtent (extent) {\n  /** @type {Entry} */\n  var bbox = {\n    minX: extent[0],\n    minY: extent[1],\n    maxX: extent[2],\n    maxY: extent[3]\n  };\n  var items = this.rbush_.search(bbox);\n  return items.map(function(item) {\n    return item.value;\n  });\n};\n\n\n/**\n * Calls a callback function with each value in the tree.\n * If the callback returns a truthy value, this value is returned without\n * checking the rest of the tree.\n * @param {function(this: S, T): *} callback Callback.\n * @param {S=} opt_this The object to use as `this` in `callback`.\n * @return {*} Callback return value.\n * @template S\n */\nRBush.prototype.forEach = function forEach (callback, opt_this) {\n  return this.forEach_(this.getAll(), callback, opt_this);\n};\n\n\n/**\n * Calls a callback function with each value in the provided extent.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {function(this: S, T): *} callback Callback.\n * @param {S=} opt_this The object to use as `this` in `callback`.\n * @return {*} Callback return value.\n * @template S\n */\nRBush.prototype.forEachInExtent = function forEachInExtent (extent, callback, opt_this) {\n  return this.forEach_(this.getInExtent(extent), callback, opt_this);\n};\n\n\n/**\n * @param {Array<T>} values Values.\n * @param {function(this: S, T): *} callback Callback.\n * @param {S=} opt_this The object to use as `this` in `callback`.\n * @private\n * @return {*} Callback return value.\n * @template S\n */\nRBush.prototype.forEach_ = function forEach_ (values, callback, opt_this) {\n  var result;\n  for (var i = 0, l = values.length; i < l; i++) {\n    result = callback.call(opt_this, values[i]);\n    if (result) {\n      return result;\n    }\n  }\n  return result;\n};\n\n\n/**\n * @return {boolean} Is empty.\n */\nRBush.prototype.isEmpty = function isEmpty$1 () {\n  return isEmpty(this.items_);\n};\n\n\n/**\n * Remove all values from the RBush.\n */\nRBush.prototype.clear = function clear () {\n  this.rbush_.clear();\n  this.items_ = {};\n};\n\n\n/**\n * @param {import(\"../extent.js\").Extent=} opt_extent Extent.\n * @return {import(\"../extent.js\").Extent} Extent.\n */\nRBush.prototype.getExtent = function getExtent (opt_extent) {\n  var data = this.rbush_.toJSON();\n  return createOrUpdate(data.minX, data.minY, data.maxX, data.maxY, opt_extent);\n};\n\n\n/**\n * @param {RBush} rbush R-Tree.\n */\nRBush.prototype.concat = function concat (rbush) {\n  this.rbush_.load(rbush.rbush_.all());\n  for (var i in rbush.items_) {\n    this.items_[i] = rbush.items_[i];\n  }\n};\n\n\nexport default RBush;\n\n//# sourceMappingURL=RBush.js.map","/**\n * @module ol/render/webgl/PolygonReplay\n */\nimport {getUid} from '../../util.js';\nimport {equals} from '../../array.js';\nimport {asArray} from '../../color.js';\nimport {intersects} from '../../extent.js';\nimport {isEmpty} from '../../obj.js';\nimport {linearRingContainsXY} from '../../geom/flat/contains.js';\nimport {linearRingIsClockwise} from '../../geom/flat/orient.js';\nimport {translate} from '../../geom/flat/transform.js';\nimport {fragment, vertex} from './polygonreplay/defaultshader.js';\nimport Locations from './polygonreplay/defaultshader/Locations.js';\nimport WebGLLineStringReplay from './LineStringReplay.js';\nimport WebGLReplay from './Replay.js';\nimport {triangleIsCounterClockwise, EPSILON, DEFAULT_FILLSTYLE} from '../webgl.js';\nimport Stroke from '../../style/Stroke.js';\nimport LinkedList from '../../structs/LinkedList.js';\nimport RBush from '../../structs/RBush.js';\nimport {FLOAT} from '../../webgl.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\n\n\n/**\n * @typedef {Object} PolygonVertex\n * @property {number} x\n * @property {number} y\n * @property {number} i\n * @property {boolean} [reflex]\n */\n\n/**\n * @typedef {Object} PolygonSegment\n * @property {PolygonVertex} p0\n * @property {PolygonVertex} p1\n */\n\n\nvar WebGLPolygonReplay = /*@__PURE__*/(function (WebGLReplay) {\n  function WebGLPolygonReplay(tolerance, maxExtent) {\n    WebGLReplay.call(this, tolerance, maxExtent);\n\n    this.lineStringReplay = new WebGLLineStringReplay(\n      tolerance, maxExtent);\n\n    /**\n     * @private\n     * @type {import(\"./polygonreplay/defaultshader/Locations.js\").default}\n     */\n    this.defaultLocations_ = null;\n\n    /**\n     * @private\n     * @type {Array<Array<number>>}\n     */\n    this.styles_ = [];\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.styleIndices_ = [];\n\n    /**\n     * @private\n     * @type {{fillColor: (Array<number>|null),\n     *         changed: boolean}|null}\n     */\n    this.state_ = {\n      fillColor: null,\n      changed: false\n    };\n\n  }\n\n  if ( WebGLReplay ) WebGLPolygonReplay.__proto__ = WebGLReplay;\n  WebGLPolygonReplay.prototype = Object.create( WebGLReplay && WebGLReplay.prototype );\n  WebGLPolygonReplay.prototype.constructor = WebGLPolygonReplay;\n\n  /**\n   * Draw one polygon.\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {Array<Array<number>>} holeFlatCoordinates Hole flat coordinates.\n   * @param {number} stride Stride.\n   * @private\n   */\n  WebGLPolygonReplay.prototype.drawCoordinates_ = function drawCoordinates_ (flatCoordinates, holeFlatCoordinates, stride) {\n    // Triangulate the polygon\n    var outerRing = new LinkedList();\n    var rtree = new RBush();\n    // Initialize the outer ring\n    this.processFlatCoordinates_(flatCoordinates, stride, outerRing, rtree, true);\n    var maxCoords = this.getMaxCoords_(outerRing);\n\n    // Eliminate holes, if there are any\n    if (holeFlatCoordinates.length) {\n      var i, ii;\n      var holeLists = [];\n      for (i = 0, ii = holeFlatCoordinates.length; i < ii; ++i) {\n        var holeList = {\n          list: new LinkedList(),\n          maxCoords: undefined,\n          rtree: new RBush()\n        };\n        holeLists.push(holeList);\n        this.processFlatCoordinates_(holeFlatCoordinates[i],\n          stride, holeList.list, holeList.rtree, false);\n        this.classifyPoints_(holeList.list, holeList.rtree, true);\n        holeList.maxCoords = this.getMaxCoords_(holeList.list);\n      }\n      holeLists.sort(function(a, b) {\n        return b.maxCoords[0] === a.maxCoords[0] ?\n          a.maxCoords[1] - b.maxCoords[1] : b.maxCoords[0] - a.maxCoords[0];\n      });\n      for (i = 0; i < holeLists.length; ++i) {\n        var currList = holeLists[i].list;\n        var start = currList.firstItem();\n        var currItem = start;\n        var intersection = (void 0);\n        do {\n          //TODO: Triangulate holes when they intersect the outer ring.\n          if (this.getIntersections_(currItem, rtree).length) {\n            intersection = true;\n            break;\n          }\n          currItem = currList.nextItem();\n        } while (start !== currItem);\n        if (!intersection) {\n          if (this.bridgeHole_(currList, holeLists[i].maxCoords[0], outerRing, maxCoords[0], rtree)) {\n            rtree.concat(holeLists[i].rtree);\n            this.classifyPoints_(outerRing, rtree, false);\n          }\n        }\n      }\n    } else {\n      this.classifyPoints_(outerRing, rtree, false);\n    }\n    this.triangulate_(outerRing, rtree);\n  };\n\n  /**\n   * Inserts flat coordinates in a linked list and adds them to the vertex buffer.\n   * @private\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} stride Stride.\n   * @param {import(\"../../structs/LinkedList.js\").default} list Linked list.\n   * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n   * @param {boolean} clockwise Coordinate order should be clockwise.\n   */\n  WebGLPolygonReplay.prototype.processFlatCoordinates_ = function processFlatCoordinates_ (flatCoordinates, stride, list, rtree, clockwise) {\n    var isClockwise = linearRingIsClockwise(flatCoordinates,\n      0, flatCoordinates.length, stride);\n    var i, ii;\n    var n = this.vertices.length / 2;\n    /** @type {PolygonVertex} */\n    var start;\n    /** @type {PolygonVertex} */\n    var p0;\n    /** @type {PolygonVertex} */\n    var p1;\n    var extents = [];\n    var segments = [];\n    if (clockwise === isClockwise) {\n      start = this.createPoint_(flatCoordinates[0], flatCoordinates[1], n++);\n      p0 = start;\n      for (i = stride, ii = flatCoordinates.length; i < ii; i += stride) {\n        p1 = this.createPoint_(flatCoordinates[i], flatCoordinates[i + 1], n++);\n        segments.push(this.insertItem_(p0, p1, list));\n        extents.push([Math.min(p0.x, p1.x), Math.min(p0.y, p1.y), Math.max(p0.x, p1.x),\n          Math.max(p0.y, p1.y)]);\n        p0 = p1;\n      }\n      segments.push(this.insertItem_(p1, start, list));\n      extents.push([Math.min(p0.x, p1.x), Math.min(p0.y, p1.y), Math.max(p0.x, p1.x),\n        Math.max(p0.y, p1.y)]);\n    } else {\n      var end = flatCoordinates.length - stride;\n      start = this.createPoint_(flatCoordinates[end], flatCoordinates[end + 1], n++);\n      p0 = start;\n      for (i = end - stride, ii = 0; i >= ii; i -= stride) {\n        p1 = this.createPoint_(flatCoordinates[i], flatCoordinates[i + 1], n++);\n        segments.push(this.insertItem_(p0, p1, list));\n        extents.push([Math.min(p0.x, p1.x), Math.min(p0.y, p1.y), Math.max(p0.x, p1.x),\n          Math.max(p0.y, p1.y)]);\n        p0 = p1;\n      }\n      segments.push(this.insertItem_(p1, start, list));\n      extents.push([Math.min(p0.x, p1.x), Math.min(p0.y, p1.y), Math.max(p0.x, p1.x),\n        Math.max(p0.y, p1.y)]);\n    }\n    rtree.load(extents, segments);\n  };\n\n  /**\n   * Returns the rightmost coordinates of a polygon on the X axis.\n   * @private\n   * @param {import(\"../../structs/LinkedList.js\").default} list Polygons ring.\n   * @return {Array<number>} Max X coordinates.\n   */\n  WebGLPolygonReplay.prototype.getMaxCoords_ = function getMaxCoords_ (list) {\n    var start = list.firstItem();\n    var seg = start;\n    var maxCoords = [seg.p0.x, seg.p0.y];\n\n    do {\n      seg = list.nextItem();\n      if (seg.p0.x > maxCoords[0]) {\n        maxCoords = [seg.p0.x, seg.p0.y];\n      }\n    } while (seg !== start);\n\n    return maxCoords;\n  };\n\n  /**\n   * Classifies the points of a polygon list as convex, reflex. Removes collinear vertices.\n   * @private\n   * @param {import(\"../../structs/LinkedList.js\").default} list Polygon ring.\n   * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n   * @param {boolean} ccw The orientation of the polygon is counter-clockwise.\n   * @return {boolean} There were reclassified points.\n   */\n  WebGLPolygonReplay.prototype.classifyPoints_ = function classifyPoints_ (list, rtree, ccw) {\n    var start = list.firstItem();\n    var s0 = start;\n    var s1 = list.nextItem();\n    var pointsReclassified = false;\n    do {\n      var reflex = ccw ? triangleIsCounterClockwise(s1.p1.x,\n        s1.p1.y, s0.p1.x, s0.p1.y, s0.p0.x, s0.p0.y) :\n        triangleIsCounterClockwise(s0.p0.x, s0.p0.y, s0.p1.x,\n          s0.p1.y, s1.p1.x, s1.p1.y);\n      if (reflex === undefined) {\n        this.removeItem_(s0, s1, list, rtree);\n        pointsReclassified = true;\n        if (s1 === start) {\n          start = list.getNextItem();\n        }\n        s1 = s0;\n        list.prevItem();\n      } else if (s0.p1.reflex !== reflex) {\n        s0.p1.reflex = reflex;\n        pointsReclassified = true;\n      }\n      s0 = s1;\n      s1 = list.nextItem();\n    } while (s0 !== start);\n    return pointsReclassified;\n  };\n\n  /**\n   * @private\n   * @param {import(\"../../structs/LinkedList.js\").default} hole Linked list of the hole.\n   * @param {number} holeMaxX Maximum X value of the hole.\n   * @param {import(\"../../structs/LinkedList.js\").default} list Linked list of the polygon.\n   * @param {number} listMaxX Maximum X value of the polygon.\n   * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n   * @return {boolean} Bridging was successful.\n   */\n  WebGLPolygonReplay.prototype.bridgeHole_ = function bridgeHole_ (hole, holeMaxX, list, listMaxX, rtree) {\n    var seg = hole.firstItem();\n    while (seg.p1.x !== holeMaxX) {\n      seg = hole.nextItem();\n    }\n\n    var p1 = seg.p1;\n    /** @type {PolygonVertex} */\n    var p2 = {x: listMaxX, y: p1.y, i: -1};\n    var minDist = Infinity;\n    var i, ii, bestPoint;\n    /** @type {PolygonVertex} */\n    var p5;\n\n    var intersectingSegments = this.getIntersections_({p0: p1, p1: p2}, rtree, true);\n    for (i = 0, ii = intersectingSegments.length; i < ii; ++i) {\n      var currSeg = intersectingSegments[i];\n      var intersection = this.calculateIntersection_(p1, p2, currSeg.p0,\n        currSeg.p1, true);\n      var dist = Math.abs(p1.x - intersection[0]);\n      if (dist < minDist && triangleIsCounterClockwise(p1.x, p1.y,\n        currSeg.p0.x, currSeg.p0.y, currSeg.p1.x, currSeg.p1.y) !== undefined) {\n        minDist = dist;\n        p5 = {x: intersection[0], y: intersection[1], i: -1};\n        seg = currSeg;\n      }\n    }\n    if (minDist === Infinity) {\n      return false;\n    }\n    bestPoint = seg.p1;\n\n    if (minDist > 0) {\n      var pointsInTriangle = this.getPointsInTriangle_(p1, p5, seg.p1, rtree);\n      if (pointsInTriangle.length) {\n        var theta = Infinity;\n        for (i = 0, ii = pointsInTriangle.length; i < ii; ++i) {\n          var currPoint = pointsInTriangle[i];\n          var currTheta = Math.atan2(p1.y - currPoint.y, p2.x - currPoint.x);\n          if (currTheta < theta || (currTheta === theta && currPoint.x < bestPoint.x)) {\n            theta = currTheta;\n            bestPoint = currPoint;\n          }\n        }\n      }\n    }\n\n    seg = list.firstItem();\n    while (seg.p1.x !== bestPoint.x || seg.p1.y !== bestPoint.y) {\n      seg = list.nextItem();\n    }\n\n    //We clone the bridge points as they can have different convexity.\n    var p0Bridge = {x: p1.x, y: p1.y, i: p1.i, reflex: undefined};\n    var p1Bridge = {x: seg.p1.x, y: seg.p1.y, i: seg.p1.i, reflex: undefined};\n\n    hole.getNextItem().p0 = p0Bridge;\n    this.insertItem_(p1, seg.p1, hole, rtree);\n    this.insertItem_(p1Bridge, p0Bridge, hole, rtree);\n    seg.p1 = p1Bridge;\n    hole.setFirstItem();\n    list.concat(hole);\n\n    return true;\n  };\n\n  /**\n   * @private\n   * @param {import(\"../../structs/LinkedList.js\").default} list Linked list of the polygon.\n   * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n   */\n  WebGLPolygonReplay.prototype.triangulate_ = function triangulate_ (list, rtree) {\n    var ccw = false;\n    var simple = this.isSimple_(list, rtree);\n\n    // Start clipping ears\n    while (list.getLength() > 3) {\n      if (simple) {\n        if (!this.clipEars_(list, rtree, simple, ccw)) {\n          if (!this.classifyPoints_(list, rtree, ccw)) {\n            // Due to the behavior of OL's PIP algorithm, the ear clipping cannot\n            // introduce touching segments. However, the original data may have some.\n            if (!this.resolveSelfIntersections_(list, rtree, true)) {\n              break;\n            }\n          }\n        }\n      } else {\n        if (!this.clipEars_(list, rtree, simple, ccw)) {\n          // We ran out of ears, try to reclassify.\n          if (!this.classifyPoints_(list, rtree, ccw)) {\n            // We have a bad polygon, try to resolve local self-intersections.\n            if (!this.resolveSelfIntersections_(list, rtree)) {\n              simple = this.isSimple_(list, rtree);\n              if (!simple) {\n                // We have a really bad polygon, try more time consuming methods.\n                this.splitPolygon_(list, rtree);\n                break;\n              } else {\n                ccw = !this.isClockwise_(list);\n                this.classifyPoints_(list, rtree, ccw);\n              }\n            }\n          }\n        }\n      }\n    }\n    if (list.getLength() === 3) {\n      var numIndices = this.indices.length;\n      this.indices[numIndices++] = list.getPrevItem().p0.i;\n      this.indices[numIndices++] = list.getCurrItem().p0.i;\n      this.indices[numIndices++] = list.getNextItem().p0.i;\n    }\n  };\n\n  /**\n   * @private\n   * @param {import(\"../../structs/LinkedList.js\").default} list Linked list of the polygon.\n   * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n   * @param {boolean} simple The polygon is simple.\n   * @param {boolean} ccw Orientation of the polygon is counter-clockwise.\n   * @return {boolean} There were processed ears.\n   */\n  WebGLPolygonReplay.prototype.clipEars_ = function clipEars_ (list, rtree, simple, ccw) {\n    var numIndices = this.indices.length;\n    var start = list.firstItem();\n    var s0 = list.getPrevItem();\n    var s1 = start;\n    var s2 = list.nextItem();\n    var s3 = list.getNextItem();\n    var p0, p1, p2;\n    var processedEars = false;\n    do {\n      p0 = s1.p0;\n      p1 = s1.p1;\n      p2 = s2.p1;\n      if (p1.reflex === false) {\n        // We might have a valid ear\n        var variableCriterion = (void 0);\n        if (simple) {\n          variableCriterion = this.getPointsInTriangle_(p0, p1, p2, rtree, true).length === 0;\n        } else {\n          variableCriterion = ccw ? this.diagonalIsInside_(s3.p1, p2, p1, p0,\n            s0.p0) : this.diagonalIsInside_(s0.p0, p0, p1, p2, s3.p1);\n        }\n        if ((simple || this.getIntersections_({p0: p0, p1: p2}, rtree).length === 0) &&\n            variableCriterion) {\n          //The diagonal is completely inside the polygon\n          if (simple || p0.reflex === false || p2.reflex === false ||\n              linearRingIsClockwise([s0.p0.x, s0.p0.y, p0.x,\n                p0.y, p1.x, p1.y, p2.x, p2.y, s3.p1.x, s3.p1.y], 0, 10, 2) === !ccw) {\n            //The diagonal is persumably valid, we have an ear\n            this.indices[numIndices++] = p0.i;\n            this.indices[numIndices++] = p1.i;\n            this.indices[numIndices++] = p2.i;\n            this.removeItem_(s1, s2, list, rtree);\n            if (s2 === start) {\n              start = s3;\n            }\n            processedEars = true;\n          }\n        }\n      }\n      // Else we have a reflex point.\n      s0 = list.getPrevItem();\n      s1 = list.getCurrItem();\n      s2 = list.nextItem();\n      s3 = list.getNextItem();\n    } while (s1 !== start && list.getLength() > 3);\n\n    return processedEars;\n  };\n\n  /**\n   * @private\n   * @param {import(\"../../structs/LinkedList.js\").default} list Linked list of the polygon.\n   * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n   * @param {boolean=} opt_touch Resolve touching segments.\n   * @return {boolean} There were resolved intersections.\n  */\n  WebGLPolygonReplay.prototype.resolveSelfIntersections_ = function resolveSelfIntersections_ (list, rtree, opt_touch) {\n    var start = list.firstItem();\n    list.nextItem();\n    var s0 = start;\n    var s1 = list.nextItem();\n    var resolvedIntersections = false;\n\n    do {\n      var intersection = this.calculateIntersection_(s0.p0, s0.p1, s1.p0, s1.p1,\n        opt_touch);\n      if (intersection) {\n        var breakCond = false;\n        var numVertices = this.vertices.length;\n        var numIndices = this.indices.length;\n        var n = numVertices / 2;\n        var seg = list.prevItem();\n        list.removeItem();\n        rtree.remove(seg);\n        breakCond = (seg === start);\n        var p = (void 0);\n        if (opt_touch) {\n          if (intersection[0] === s0.p0.x && intersection[1] === s0.p0.y) {\n            list.prevItem();\n            p = s0.p0;\n            s1.p0 = p;\n            rtree.remove(s0);\n            breakCond = breakCond || (s0 === start);\n          } else {\n            p = s1.p1;\n            s0.p1 = p;\n            rtree.remove(s1);\n            breakCond = breakCond || (s1 === start);\n          }\n          list.removeItem();\n        } else {\n          p = this.createPoint_(intersection[0], intersection[1], n);\n          s0.p1 = p;\n          s1.p0 = p;\n          rtree.update([Math.min(s0.p0.x, s0.p1.x), Math.min(s0.p0.y, s0.p1.y),\n            Math.max(s0.p0.x, s0.p1.x), Math.max(s0.p0.y, s0.p1.y)], s0);\n          rtree.update([Math.min(s1.p0.x, s1.p1.x), Math.min(s1.p0.y, s1.p1.y),\n            Math.max(s1.p0.x, s1.p1.x), Math.max(s1.p0.y, s1.p1.y)], s1);\n        }\n\n        this.indices[numIndices++] = seg.p0.i;\n        this.indices[numIndices++] = seg.p1.i;\n        this.indices[numIndices++] = p.i;\n\n        resolvedIntersections = true;\n        if (breakCond) {\n          break;\n        }\n      }\n\n      s0 = list.getPrevItem();\n      s1 = list.nextItem();\n    } while (s0 !== start);\n    return resolvedIntersections;\n  };\n\n  /**\n   * @private\n   * @param {import(\"../../structs/LinkedList.js\").default} list Linked list of the polygon.\n   * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n   * @return {boolean} The polygon is simple.\n   */\n  WebGLPolygonReplay.prototype.isSimple_ = function isSimple_ (list, rtree) {\n    var start = list.firstItem();\n    var seg = start;\n    do {\n      if (this.getIntersections_(seg, rtree).length) {\n        return false;\n      }\n      seg = list.nextItem();\n    } while (seg !== start);\n    return true;\n  };\n\n  /**\n   * @private\n   * @param {import(\"../../structs/LinkedList.js\").default} list Linked list of the polygon.\n   * @return {boolean} Orientation is clockwise.\n   */\n  WebGLPolygonReplay.prototype.isClockwise_ = function isClockwise_ (list) {\n    var length = list.getLength() * 2;\n    var flatCoordinates = new Array(length);\n    var start = list.firstItem();\n    var seg = start;\n    var i = 0;\n    do {\n      flatCoordinates[i++] = seg.p0.x;\n      flatCoordinates[i++] = seg.p0.y;\n      seg = list.nextItem();\n    } while (seg !== start);\n    return linearRingIsClockwise(flatCoordinates, 0, length, 2);\n  };\n\n  /**\n   * @private\n   * @param {import(\"../../structs/LinkedList.js\").default} list Linked list of the polygon.\n   * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n   */\n  WebGLPolygonReplay.prototype.splitPolygon_ = function splitPolygon_ (list, rtree) {\n    var start = list.firstItem();\n    var s0 = start;\n    do {\n      var intersections = this.getIntersections_(s0, rtree);\n      if (intersections.length) {\n        var s1 = intersections[0];\n        var n = this.vertices.length / 2;\n        var intersection = this.calculateIntersection_(s0.p0,\n          s0.p1, s1.p0, s1.p1);\n        var p = this.createPoint_(intersection[0], intersection[1], n);\n        var newPolygon = new LinkedList();\n        var newRtree = new RBush();\n        this.insertItem_(p, s0.p1, newPolygon, newRtree);\n        s0.p1 = p;\n        rtree.update([Math.min(s0.p0.x, p.x), Math.min(s0.p0.y, p.y),\n          Math.max(s0.p0.x, p.x), Math.max(s0.p0.y, p.y)], s0);\n        var currItem = list.nextItem();\n        while (currItem !== s1) {\n          this.insertItem_(currItem.p0, currItem.p1, newPolygon, newRtree);\n          rtree.remove(currItem);\n          list.removeItem();\n          currItem = list.getCurrItem();\n        }\n        this.insertItem_(s1.p0, p, newPolygon, newRtree);\n        s1.p0 = p;\n        rtree.update([Math.min(s1.p1.x, p.x), Math.min(s1.p1.y, p.y),\n          Math.max(s1.p1.x, p.x), Math.max(s1.p1.y, p.y)], s1);\n        this.classifyPoints_(list, rtree, false);\n        this.triangulate_(list, rtree);\n        this.classifyPoints_(newPolygon, newRtree, false);\n        this.triangulate_(newPolygon, newRtree);\n        break;\n      }\n      s0 = list.nextItem();\n    } while (s0 !== start);\n  };\n\n  /**\n   * @private\n   * @param {number} x X coordinate.\n   * @param {number} y Y coordinate.\n   * @param {number} i Index.\n   * @return {PolygonVertex} List item.\n   */\n  WebGLPolygonReplay.prototype.createPoint_ = function createPoint_ (x, y, i) {\n    var numVertices = this.vertices.length;\n    this.vertices[numVertices++] = x;\n    this.vertices[numVertices++] = y;\n    /** @type {PolygonVertex} */\n    var p = {\n      x: x,\n      y: y,\n      i: i,\n      reflex: undefined\n    };\n    return p;\n  };\n\n  /**\n   * @private\n   * @param {PolygonVertex} p0 First point of segment.\n   * @param {PolygonVertex} p1 Second point of segment.\n   * @param {import(\"../../structs/LinkedList.js\").default} list Polygon ring.\n   * @param {import(\"../../structs/RBush.js\").default=} opt_rtree Insert the segment into the R-Tree.\n   * @return {PolygonSegment} segment.\n   */\n  WebGLPolygonReplay.prototype.insertItem_ = function insertItem_ (p0, p1, list, opt_rtree) {\n    var seg = {\n      p0: p0,\n      p1: p1\n    };\n    list.insertItem(seg);\n    if (opt_rtree) {\n      opt_rtree.insert([Math.min(p0.x, p1.x), Math.min(p0.y, p1.y),\n        Math.max(p0.x, p1.x), Math.max(p0.y, p1.y)], seg);\n    }\n    return seg;\n  };\n\n  /**\n    * @private\n    * @param {PolygonSegment} s0 Segment before the remove candidate.\n    * @param {PolygonSegment} s1 Remove candidate segment.\n    * @param {import(\"../../structs/LinkedList.js\").default} list Polygon ring.\n    * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n    */\n  WebGLPolygonReplay.prototype.removeItem_ = function removeItem_ (s0, s1, list, rtree) {\n    if (list.getCurrItem() === s1) {\n      list.removeItem();\n      s0.p1 = s1.p1;\n      rtree.remove(s1);\n      rtree.update([Math.min(s0.p0.x, s0.p1.x), Math.min(s0.p0.y, s0.p1.y),\n        Math.max(s0.p0.x, s0.p1.x), Math.max(s0.p0.y, s0.p1.y)], s0);\n    }\n  };\n\n  /**\n   * @private\n   * @param {PolygonVertex} p0 First point.\n   * @param {PolygonVertex} p1 Second point.\n   * @param {PolygonVertex} p2 Third point.\n   * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n   * @param {boolean=} opt_reflex Only include reflex points.\n   * @return {Array<PolygonVertex>} Points in the triangle.\n   */\n  WebGLPolygonReplay.prototype.getPointsInTriangle_ = function getPointsInTriangle_ (p0, p1, p2, rtree, opt_reflex) {\n    var result = [];\n    var segmentsInExtent = rtree.getInExtent([Math.min(p0.x, p1.x, p2.x),\n      Math.min(p0.y, p1.y, p2.y), Math.max(p0.x, p1.x, p2.x), Math.max(p0.y,\n        p1.y, p2.y)]);\n    for (var i = 0, ii = segmentsInExtent.length; i < ii; ++i) {\n      for (var j in segmentsInExtent[i]) {\n        var p = segmentsInExtent[i][j];\n        if (typeof p === 'object' && (!opt_reflex || p.reflex)) {\n          if ((p.x !== p0.x || p.y !== p0.y) && (p.x !== p1.x || p.y !== p1.y) &&\n              (p.x !== p2.x || p.y !== p2.y) && result.indexOf(p) === -1 &&\n              linearRingContainsXY([p0.x, p0.y, p1.x, p1.y, p2.x, p2.y], 0, 6, 2, p.x, p.y)) {\n            result.push(p);\n          }\n        }\n      }\n    }\n    return result;\n  };\n\n  /**\n   * @private\n   * @param {PolygonSegment} segment Segment.\n   * @param {import(\"../../structs/RBush.js\").default} rtree R-Tree of the polygon.\n   * @param {boolean=} opt_touch Touching segments should be considered an intersection.\n   * @return {Array<PolygonSegment>} Intersecting segments.\n   */\n  WebGLPolygonReplay.prototype.getIntersections_ = function getIntersections_ (segment, rtree, opt_touch) {\n    var p0 = segment.p0;\n    var p1 = segment.p1;\n    var segmentsInExtent = rtree.getInExtent([Math.min(p0.x, p1.x),\n      Math.min(p0.y, p1.y), Math.max(p0.x, p1.x), Math.max(p0.y, p1.y)]);\n    var result = [];\n    for (var i = 0, ii = segmentsInExtent.length; i < ii; ++i) {\n      var currSeg = segmentsInExtent[i];\n      if (segment !== currSeg && (opt_touch || currSeg.p0 !== p1 || currSeg.p1 !== p0) &&\n          this.calculateIntersection_(p0, p1, currSeg.p0, currSeg.p1, opt_touch)) {\n        result.push(currSeg);\n      }\n    }\n    return result;\n  };\n\n  /**\n   * Line intersection algorithm by Paul Bourke.\n   * See http://paulbourke.net/geometry/pointlineplane/.\n   *\n   * @private\n   * @param {PolygonVertex} p0 First point.\n   * @param {PolygonVertex} p1 Second point.\n   * @param {PolygonVertex} p2 Third point.\n   * @param {PolygonVertex} p3 Fourth point.\n   * @param {boolean=} opt_touch Touching segments should be considered an intersection.\n   * @return {Array<number>|undefined} Intersection coordinates.\n   */\n  WebGLPolygonReplay.prototype.calculateIntersection_ = function calculateIntersection_ (p0, p1, p2, p3, opt_touch) {\n    var denom = (p3.y - p2.y) * (p1.x - p0.x) - (p3.x - p2.x) * (p1.y - p0.y);\n    if (denom !== 0) {\n      var ua = ((p3.x - p2.x) * (p0.y - p2.y) - (p3.y - p2.y) * (p0.x - p2.x)) / denom;\n      var ub = ((p1.x - p0.x) * (p0.y - p2.y) - (p1.y - p0.y) * (p0.x - p2.x)) / denom;\n      if ((!opt_touch && ua > EPSILON && ua < 1 - EPSILON &&\n          ub > EPSILON && ub < 1 - EPSILON) || (opt_touch &&\n          ua >= 0 && ua <= 1 && ub >= 0 && ub <= 1)) {\n        return [p0.x + ua * (p1.x - p0.x), p0.y + ua * (p1.y - p0.y)];\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * @private\n   * @param {PolygonVertex} p0 Point before the start of the diagonal.\n   * @param {PolygonVertex} p1 Start point of the diagonal.\n   * @param {PolygonVertex} p2 Ear candidate.\n   * @param {PolygonVertex} p3 End point of the diagonal.\n   * @param {PolygonVertex} p4 Point after the end of the diagonal.\n   * @return {boolean} Diagonal is inside the polygon.\n   */\n  WebGLPolygonReplay.prototype.diagonalIsInside_ = function diagonalIsInside_ (p0, p1, p2, p3, p4) {\n    if (p1.reflex === undefined || p3.reflex === undefined) {\n      return false;\n    }\n    var p1IsLeftOf = (p2.x - p3.x) * (p1.y - p3.y) > (p2.y - p3.y) * (p1.x - p3.x);\n    var p1IsRightOf = (p4.x - p3.x) * (p1.y - p3.y) < (p4.y - p3.y) * (p1.x - p3.x);\n    var p3IsLeftOf = (p0.x - p1.x) * (p3.y - p1.y) > (p0.y - p1.y) * (p3.x - p1.x);\n    var p3IsRightOf = (p2.x - p1.x) * (p3.y - p1.y) < (p2.y - p1.y) * (p3.x - p1.x);\n    var p1InCone = p3.reflex ? p1IsRightOf || p1IsLeftOf : p1IsRightOf && p1IsLeftOf;\n    var p3InCone = p1.reflex ? p3IsRightOf || p3IsLeftOf : p3IsRightOf && p3IsLeftOf;\n    return p1InCone && p3InCone;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLPolygonReplay.prototype.drawMultiPolygon = function drawMultiPolygon (multiPolygonGeometry, feature) {\n    var endss = multiPolygonGeometry.getEndss();\n    var stride = multiPolygonGeometry.getStride();\n    var currIndex = this.indices.length;\n    var currLineIndex = this.lineStringReplay.getCurrentIndex();\n    var flatCoordinates = multiPolygonGeometry.getFlatCoordinates();\n    var i, ii, j, jj;\n    var start = 0;\n    for (i = 0, ii = endss.length; i < ii; ++i) {\n      var ends = endss[i];\n      if (ends.length > 0) {\n        var outerRing = translate(flatCoordinates, start, ends[0],\n          stride, -this.origin[0], -this.origin[1]);\n        if (outerRing.length) {\n          var holes = [];\n          var holeFlatCoords = (void 0);\n          for (j = 1, jj = ends.length; j < jj; ++j) {\n            if (ends[j] !== ends[j - 1]) {\n              holeFlatCoords = translate(flatCoordinates, ends[j - 1],\n                ends[j], stride, -this.origin[0], -this.origin[1]);\n              holes.push(holeFlatCoords);\n            }\n          }\n          this.lineStringReplay.drawPolygonCoordinates(outerRing, holes, stride);\n          this.drawCoordinates_(outerRing, holes, stride);\n        }\n      }\n      start = ends[ends.length - 1];\n    }\n    if (this.indices.length > currIndex) {\n      this.startIndices.push(currIndex);\n      this.startIndicesFeature.push(feature);\n      if (this.state_.changed) {\n        this.styleIndices_.push(currIndex);\n        this.state_.changed = false;\n      }\n    }\n    if (this.lineStringReplay.getCurrentIndex() > currLineIndex) {\n      this.lineStringReplay.setPolygonStyle(feature, currLineIndex);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLPolygonReplay.prototype.drawPolygon = function drawPolygon (polygonGeometry, feature) {\n    var ends = polygonGeometry.getEnds();\n    var stride = polygonGeometry.getStride();\n    if (ends.length > 0) {\n      var flatCoordinates = polygonGeometry.getFlatCoordinates().map(Number);\n      var outerRing = translate(flatCoordinates, 0, ends[0],\n        stride, -this.origin[0], -this.origin[1]);\n      if (outerRing.length) {\n        var holes = [];\n        var i, ii, holeFlatCoords;\n        for (i = 1, ii = ends.length; i < ii; ++i) {\n          if (ends[i] !== ends[i - 1]) {\n            holeFlatCoords = translate(flatCoordinates, ends[i - 1],\n              ends[i], stride, -this.origin[0], -this.origin[1]);\n            holes.push(holeFlatCoords);\n          }\n        }\n\n        this.startIndices.push(this.indices.length);\n        this.startIndicesFeature.push(feature);\n        if (this.state_.changed) {\n          this.styleIndices_.push(this.indices.length);\n          this.state_.changed = false;\n        }\n        this.lineStringReplay.setPolygonStyle(feature);\n\n        this.lineStringReplay.drawPolygonCoordinates(outerRing, holes, stride);\n        this.drawCoordinates_(outerRing, holes, stride);\n      }\n    }\n  };\n\n  /**\n   * @inheritDoc\n   **/\n  WebGLPolygonReplay.prototype.finish = function finish (context) {\n    // create, bind, and populate the vertices buffer\n    this.verticesBuffer = new WebGLBuffer(this.vertices);\n\n    // create, bind, and populate the indices buffer\n    this.indicesBuffer = new WebGLBuffer(this.indices);\n\n    this.startIndices.push(this.indices.length);\n\n    this.lineStringReplay.finish(context);\n\n    //Clean up, if there is nothing to draw\n    if (this.styleIndices_.length === 0 && this.styles_.length > 0) {\n      this.styles_ = [];\n    }\n\n    this.vertices = null;\n    this.indices = null;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLPolygonReplay.prototype.getDeleteResourcesFunction = function getDeleteResourcesFunction (context) {\n    var verticesBuffer = this.verticesBuffer;\n    var indicesBuffer = this.indicesBuffer;\n    var lineDeleter = this.lineStringReplay.getDeleteResourcesFunction(context);\n    return function() {\n      context.deleteBuffer(verticesBuffer);\n      context.deleteBuffer(indicesBuffer);\n      lineDeleter();\n    };\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLPolygonReplay.prototype.setUpProgram = function setUpProgram (gl, context, size, pixelRatio) {\n    // get the program\n    var program = context.getProgram(fragment, vertex);\n\n    // get the locations\n    var locations;\n    if (!this.defaultLocations_) {\n      locations = new Locations(gl, program);\n      this.defaultLocations_ = locations;\n    } else {\n      locations = this.defaultLocations_;\n    }\n\n    context.useProgram(program);\n\n    // enable the vertex attrib arrays\n    gl.enableVertexAttribArray(locations.a_position);\n    gl.vertexAttribPointer(locations.a_position, 2, FLOAT,\n      false, 8, 0);\n\n    return locations;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLPolygonReplay.prototype.shutDownProgram = function shutDownProgram (gl, locations) {\n    gl.disableVertexAttribArray(locations.a_position);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLPolygonReplay.prototype.drawReplay = function drawReplay (gl, context, skippedFeaturesHash, hitDetection) {\n    //Save GL parameters.\n    var tmpDepthFunc = /** @type {number} */ (gl.getParameter(gl.DEPTH_FUNC));\n    var tmpDepthMask = /** @type {boolean} */ (gl.getParameter(gl.DEPTH_WRITEMASK));\n\n    if (!hitDetection) {\n      gl.enable(gl.DEPTH_TEST);\n      gl.depthMask(true);\n      gl.depthFunc(gl.NOTEQUAL);\n    }\n\n    if (!isEmpty(skippedFeaturesHash)) {\n      this.drawReplaySkipping_(gl, context, skippedFeaturesHash);\n    } else {\n      //Draw by style groups to minimize drawElements() calls.\n      var i, start, end, nextStyle;\n      end = this.startIndices[this.startIndices.length - 1];\n      for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n        start = this.styleIndices_[i];\n        nextStyle = this.styles_[i];\n        this.setFillStyle_(gl, nextStyle);\n        this.drawElements(gl, context, start, end);\n        end = start;\n      }\n    }\n    if (!hitDetection) {\n      gl.disable(gl.DEPTH_TEST);\n      gl.clear(gl.DEPTH_BUFFER_BIT);\n      //Restore GL parameters.\n      gl.depthMask(tmpDepthMask);\n      gl.depthFunc(tmpDepthFunc);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLPolygonReplay.prototype.drawHitDetectionReplayOneByOne = function drawHitDetectionReplayOneByOne (gl, context, skippedFeaturesHash, featureCallback, opt_hitExtent) {\n    var i, start, end, nextStyle, groupStart, feature, featureIndex;\n    featureIndex = this.startIndices.length - 2;\n    end = this.startIndices[featureIndex + 1];\n    for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n      nextStyle = this.styles_[i];\n      this.setFillStyle_(gl, nextStyle);\n      groupStart = this.styleIndices_[i];\n\n      while (featureIndex >= 0 &&\n          this.startIndices[featureIndex] >= groupStart) {\n        start = this.startIndices[featureIndex];\n        feature = this.startIndicesFeature[featureIndex];\n\n        if (skippedFeaturesHash[getUid(feature)] === undefined &&\n            feature.getGeometry() &&\n            (opt_hitExtent === undefined || intersects(\n              /** @type {Array<number>} */ (opt_hitExtent),\n              feature.getGeometry().getExtent()))) {\n          gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);\n          this.drawElements(gl, context, start, end);\n\n          var result = featureCallback(feature);\n\n          if (result) {\n            return result;\n          }\n\n        }\n        featureIndex--;\n        end = start;\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * @private\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {Object} skippedFeaturesHash Ids of features to skip.\n   */\n  WebGLPolygonReplay.prototype.drawReplaySkipping_ = function drawReplaySkipping_ (gl, context, skippedFeaturesHash) {\n    var i, start, end, nextStyle, groupStart, feature, featureIndex, featureStart;\n    featureIndex = this.startIndices.length - 2;\n    end = start = this.startIndices[featureIndex + 1];\n    for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n      nextStyle = this.styles_[i];\n      this.setFillStyle_(gl, nextStyle);\n      groupStart = this.styleIndices_[i];\n\n      while (featureIndex >= 0 &&\n          this.startIndices[featureIndex] >= groupStart) {\n        featureStart = this.startIndices[featureIndex];\n        feature = this.startIndicesFeature[featureIndex];\n\n        if (skippedFeaturesHash[getUid(feature)]) {\n          if (start !== end) {\n            this.drawElements(gl, context, start, end);\n            gl.clear(gl.DEPTH_BUFFER_BIT);\n          }\n          end = featureStart;\n        }\n        featureIndex--;\n        start = featureStart;\n      }\n      if (start !== end) {\n        this.drawElements(gl, context, start, end);\n        gl.clear(gl.DEPTH_BUFFER_BIT);\n      }\n      start = end = groupStart;\n    }\n  };\n\n  /**\n   * @private\n   * @param {WebGLRenderingContext} gl gl.\n   * @param {Array<number>} color Color.\n   */\n  WebGLPolygonReplay.prototype.setFillStyle_ = function setFillStyle_ (gl, color) {\n    gl.uniform4fv(this.defaultLocations_.u_color, color);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLPolygonReplay.prototype.setFillStrokeStyle = function setFillStrokeStyle (fillStyle, strokeStyle) {\n    var fillStyleColor = fillStyle ? fillStyle.getColor() : [0, 0, 0, 0];\n    if (!(fillStyleColor instanceof CanvasGradient) &&\n        !(fillStyleColor instanceof CanvasPattern)) {\n      fillStyleColor = asArray(fillStyleColor).map(function(c, i) {\n        return i != 3 ? c / 255 : c;\n      }) || DEFAULT_FILLSTYLE;\n    } else {\n      fillStyleColor = DEFAULT_FILLSTYLE;\n    }\n    if (!this.state_.fillColor || !equals(fillStyleColor, this.state_.fillColor)) {\n      this.state_.fillColor = fillStyleColor;\n      this.state_.changed = true;\n      this.styles_.push(fillStyleColor);\n    }\n    //Provide a null stroke style, if no strokeStyle is provided. Required for the draw interaction to work.\n    if (strokeStyle) {\n      this.lineStringReplay.setFillStrokeStyle(null, strokeStyle);\n    } else {\n      var nullStrokeStyle = new Stroke({\n        color: [0, 0, 0, 0],\n        width: 0\n      });\n      this.lineStringReplay.setFillStrokeStyle(null, nullStrokeStyle);\n    }\n  };\n\n  return WebGLPolygonReplay;\n}(WebGLReplay));\n\n\nexport default WebGLPolygonReplay;\n\n//# sourceMappingURL=PolygonReplay.js.map","/**\n * @module ol/style/Atlas\n */\nimport {createCanvasContext2D} from '../dom.js';\n\n\n/**\n * @typedef {Object} AtlasBlock\n * @property {number} x\n * @property {number} y\n * @property {number} width\n * @property {number} height\n */\n\n/**\n * Provides information for an image inside an atlas.\n * `offsetX` and `offsetY` are the position of the image inside the atlas image `image`.\n * @typedef {Object} AtlasInfo\n * @property {number} offsetX\n * @property {number} offsetY\n * @property {HTMLCanvasElement} image\n */\n\n\n/**\n * @classesc\n * This class facilitates the creation of image atlases.\n *\n * Images added to an atlas will be rendered onto a single\n * atlas canvas. The distribution of images on the canvas is\n * managed with the bin packing algorithm described in:\n * http://www.blackpawn.com/texts/lightmaps/\n *\n * @param {number} size The size in pixels of the sprite image.\n * @param {number} space The space in pixels between images.\n *    Because texture coordinates are float values, the edges of\n *    images might not be completely correct (in a way that the\n *    edges overlap when being rendered). To avoid this we add a\n *    padding around each image.\n */\nvar Atlas = function Atlas(size, space) {\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.space_ = space;\n\n  /**\n   * @private\n   * @type {Array<AtlasBlock>}\n   */\n  this.emptyBlocks_ = [{x: 0, y: 0, width: size, height: size}];\n\n  /**\n   * @private\n   * @type {Object<string, AtlasInfo>}\n   */\n  this.entries_ = {};\n\n  /**\n   * @private\n   * @type {CanvasRenderingContext2D}\n   */\n  this.context_ = createCanvasContext2D(size, size);\n\n  /**\n   * @private\n   * @type {HTMLCanvasElement}\n   */\n  this.canvas_ = this.context_.canvas;\n};\n\n/**\n * @param {string} id The identifier of the entry to check.\n * @return {?AtlasInfo} The atlas info.\n */\nAtlas.prototype.get = function get (id) {\n  return this.entries_[id] || null;\n};\n\n/**\n * @param {string} id The identifier of the entry to add.\n * @param {number} width The width.\n * @param {number} height The height.\n * @param {function(CanvasRenderingContext2D, number, number)} renderCallback\n *  Called to render the new image onto an atlas image.\n * @param {Object=} opt_this Value to use as `this` when executing\n *  `renderCallback`.\n * @return {?AtlasInfo} The position and atlas image for the entry.\n */\nAtlas.prototype.add = function add (id, width, height, renderCallback, opt_this) {\n  for (var i = 0, ii = this.emptyBlocks_.length; i < ii; ++i) {\n    var block = this.emptyBlocks_[i];\n    if (block.width >= width + this.space_ &&\n        block.height >= height + this.space_) {\n      // we found a block that is big enough for our entry\n      var entry = {\n        offsetX: block.x + this.space_,\n        offsetY: block.y + this.space_,\n        image: this.canvas_\n      };\n      this.entries_[id] = entry;\n\n      // render the image on the atlas image\n      renderCallback.call(opt_this, this.context_,\n        block.x + this.space_, block.y + this.space_);\n\n      // split the block after the insertion, either horizontally or vertically\n      this.split_(i, block, width + this.space_, height + this.space_);\n\n      return entry;\n    }\n  }\n\n  // there is no space for the new entry in this atlas\n  return null;\n};\n\n/**\n * @private\n * @param {number} index The index of the block.\n * @param {AtlasBlock} block The block to split.\n * @param {number} width The width of the entry to insert.\n * @param {number} height The height of the entry to insert.\n */\nAtlas.prototype.split_ = function split_ (index, block, width, height) {\n  var deltaWidth = block.width - width;\n  var deltaHeight = block.height - height;\n\n  /** @type {AtlasBlock} */\n  var newBlock1;\n  /** @type {AtlasBlock} */\n  var newBlock2;\n\n  if (deltaWidth > deltaHeight) {\n    // split vertically\n    // block right of the inserted entry\n    newBlock1 = {\n      x: block.x + width,\n      y: block.y,\n      width: block.width - width,\n      height: block.height\n    };\n\n    // block below the inserted entry\n    newBlock2 = {\n      x: block.x,\n      y: block.y + height,\n      width: width,\n      height: block.height - height\n    };\n    this.updateBlocks_(index, newBlock1, newBlock2);\n  } else {\n    // split horizontally\n    // block right of the inserted entry\n    newBlock1 = {\n      x: block.x + width,\n      y: block.y,\n      width: block.width - width,\n      height: height\n    };\n\n    // block below the inserted entry\n    newBlock2 = {\n      x: block.x,\n      y: block.y + height,\n      width: block.width,\n      height: block.height - height\n    };\n    this.updateBlocks_(index, newBlock1, newBlock2);\n  }\n};\n\n/**\n * Remove the old block and insert new blocks at the same array position.\n * The new blocks are inserted at the same position, so that splitted\n * blocks (that are potentially smaller) are filled first.\n * @private\n * @param {number} index The index of the block to remove.\n * @param {AtlasBlock} newBlock1 The 1st block to add.\n * @param {AtlasBlock} newBlock2 The 2nd block to add.\n */\nAtlas.prototype.updateBlocks_ = function updateBlocks_ (index, newBlock1, newBlock2) {\n  var args = /** @type {Array<*>} */ ([index, 1]);\n  if (newBlock1.width > 0 && newBlock1.height > 0) {\n    args.push(newBlock1);\n  }\n  if (newBlock2.width > 0 && newBlock2.height > 0) {\n    args.push(newBlock2);\n  }\n  this.emptyBlocks_.splice.apply(this.emptyBlocks_, args);\n};\n\nexport default Atlas;\n\n//# sourceMappingURL=Atlas.js.map","/**\n * @module ol/style/AtlasManager\n */\nimport {MAX_TEXTURE_SIZE as WEBGL_MAX_TEXTURE_SIZE} from '../webgl.js';\nimport {VOID} from '../functions.js';\nimport Atlas from './Atlas.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [initialSize=256] The size in pixels of the first atlas image.\n * @property {number} [maxSize] The maximum size in pixels of atlas images. Default is\n * `webgl/MAX_TEXTURE_SIZE` or 2048 if WebGL is not supported.\n * @property {number} [space=1] The space in pixels between images.\n */\n\n\n/**\n * Provides information for an image inside an atlas manager.\n * `offsetX` and `offsetY` is the position of the image inside\n * the atlas image `image` and the position of the hit-detection image\n * inside the hit-detection atlas image `hitImage`.\n * @typedef {Object} AtlasManagerInfo\n * @property {number} offsetX\n * @property {number} offsetY\n * @property {HTMLCanvasElement} image\n * @property {HTMLCanvasElement} hitImage\n */\n\n\n/**\n * The size in pixels of the first atlas image.\n * @type {number}\n */\nvar INITIAL_ATLAS_SIZE = 256;\n\n/**\n * The maximum size in pixels of atlas images.\n * @type {number}\n */\nvar MAX_ATLAS_SIZE = -1;\n\n\n/**\n * @classdesc\n * Manages the creation of image atlases.\n *\n * Images added to this manager will be inserted into an atlas, which\n * will be used for rendering.\n * The `size` given in the constructor is the size for the first\n * atlas. After that, when new atlases are created, they will have\n * twice the size as the latest atlas (until `maxSize` is reached).\n *\n * If an application uses many images or very large images, it is recommended\n * to set a higher `size` value to avoid the creation of too many atlases.\n * @api\n */\nvar AtlasManager = function AtlasManager(opt_options) {\n\n  var options = opt_options || {};\n\n  /**\n   * The size in pixels of the latest atlas image.\n   * @private\n   * @type {number}\n   */\n  this.currentSize_ = options.initialSize !== undefined ?\n    options.initialSize : INITIAL_ATLAS_SIZE;\n\n  /**\n   * The maximum size in pixels of atlas images.\n   * @private\n   * @type {number}\n   */\n  this.maxSize_ = options.maxSize !== undefined ?\n    options.maxSize : MAX_ATLAS_SIZE != -1 ?\n      MAX_ATLAS_SIZE : WEBGL_MAX_TEXTURE_SIZE !== undefined ?\n        WEBGL_MAX_TEXTURE_SIZE : 2048;\n\n  /**\n   * The size in pixels between images.\n   * @private\n   * @type {number}\n   */\n  this.space_ = options.space !== undefined ? options.space : 1;\n\n  /**\n   * @private\n   * @type {Array<import(\"./Atlas.js\").default>}\n   */\n  this.atlases_ = [new Atlas(this.currentSize_, this.space_)];\n\n  /**\n   * The size in pixels of the latest atlas image for hit-detection images.\n   * @private\n   * @type {number}\n   */\n  this.currentHitSize_ = this.currentSize_;\n\n  /**\n   * @private\n   * @type {Array<import(\"./Atlas.js\").default>}\n   */\n  this.hitAtlases_ = [new Atlas(this.currentHitSize_, this.space_)];\n};\n\n/**\n * @param {string} id The identifier of the entry to check.\n * @return {?AtlasManagerInfo} The position and atlas image for the\n *  entry, or `null` if the entry is not part of the atlas manager.\n */\nAtlasManager.prototype.getInfo = function getInfo (id) {\n  /** @type {?import(\"./Atlas.js\").AtlasInfo} */\n  var info = this.getInfo_(this.atlases_, id);\n\n  if (!info) {\n    return null;\n  }\n  var hitInfo = /** @type {import(\"./Atlas.js\").AtlasInfo} */ (this.getInfo_(this.hitAtlases_, id));\n\n  return this.mergeInfos_(info, hitInfo);\n};\n\n/**\n * @private\n * @param {Array<import(\"./Atlas.js\").default>} atlases The atlases to search.\n * @param {string} id The identifier of the entry to check.\n * @return {?import(\"./Atlas.js\").AtlasInfo} The position and atlas image for the entry,\n *  or `null` if the entry is not part of the atlases.\n */\nAtlasManager.prototype.getInfo_ = function getInfo_ (atlases, id) {\n  for (var i = 0, ii = atlases.length; i < ii; ++i) {\n    var atlas = atlases[i];\n    var info = atlas.get(id);\n    if (info) {\n      return info;\n    }\n  }\n  return null;\n};\n\n/**\n * @private\n * @param {import(\"./Atlas.js\").AtlasInfo} info The info for the real image.\n * @param {import(\"./Atlas.js\").AtlasInfo} hitInfo The info for the hit-detection\n *  image.\n * @return {?AtlasManagerInfo} The position and atlas image for the\n *  entry, or `null` if the entry is not part of the atlases.\n */\nAtlasManager.prototype.mergeInfos_ = function mergeInfos_ (info, hitInfo) {\n  return (\n    /** @type {AtlasManagerInfo} */ ({\n      offsetX: info.offsetX,\n      offsetY: info.offsetY,\n      image: info.image,\n      hitImage: hitInfo.image\n    })\n  );\n};\n\n/**\n * Add an image to the atlas manager.\n *\n * If an entry for the given id already exists, the entry will\n * be overridden (but the space on the atlas graphic will not be freed).\n *\n * If `renderHitCallback` is provided, the image (or the hit-detection version\n * of the image) will be rendered into a separate hit-detection atlas image.\n *\n * @param {string} id The identifier of the entry to add.\n * @param {number} width The width.\n * @param {number} height The height.\n * @param {function(CanvasRenderingContext2D, number, number)} renderCallback\n *  Called to render the new image onto an atlas image.\n * @param {function(CanvasRenderingContext2D, number, number)=} opt_renderHitCallback Called to render a hit-detection image onto a hit\n *  detection atlas image.\n * @param {Object=} opt_this Value to use as `this` when executing\n *  `renderCallback` and `renderHitCallback`.\n * @return {?AtlasManagerInfo}The position and atlas image for the\n *  entry, or `null` if the image is too big.\n */\nAtlasManager.prototype.add = function add (id, width, height, renderCallback, opt_renderHitCallback, opt_this) {\n  if (width + this.space_ > this.maxSize_ ||\n      height + this.space_ > this.maxSize_) {\n    return null;\n  }\n\n  /** @type {?import(\"./Atlas.js\").AtlasInfo} */\n  var info = this.add_(false, id, width, height, renderCallback, opt_this);\n  if (!info) {\n    return null;\n  }\n\n  // even if no hit-detection entry is requested, we insert a fake entry into\n  // the hit-detection atlas, to make sure that the offset is the same for\n  // the original image and the hit-detection image.\n  var renderHitCallback = opt_renderHitCallback !== undefined ?\n    opt_renderHitCallback : VOID;\n\n  var hitInfo = /** @type {import(\"./Atlas.js\").AtlasInfo} */ (this.add_(true,\n    id, width, height, renderHitCallback, opt_this));\n\n  return this.mergeInfos_(info, hitInfo);\n};\n\n/**\n * @private\n * @param {boolean} isHitAtlas If the hit-detection atlases are used.\n * @param {string} id The identifier of the entry to add.\n * @param {number} width The width.\n * @param {number} height The height.\n * @param {function(CanvasRenderingContext2D, number, number)} renderCallback\n *  Called to render the new image onto an atlas image.\n * @param {Object=} opt_this Value to use as `this` when executing\n *  `renderCallback` and `renderHitCallback`.\n * @return {?import(\"./Atlas.js\").AtlasInfo}The position and atlas image for the entry,\n *  or `null` if the image is too big.\n */\nAtlasManager.prototype.add_ = function add_ (isHitAtlas, id, width, height, renderCallback, opt_this) {\n  var atlases = (isHitAtlas) ? this.hitAtlases_ : this.atlases_;\n  var atlas, info, i, ii;\n  for (i = 0, ii = atlases.length; i < ii; ++i) {\n    atlas = atlases[i];\n    info = atlas.add(id, width, height, renderCallback, opt_this);\n    if (info) {\n      return info;\n    } else if (!info && i === ii - 1) {\n      // the entry could not be added to one of the existing atlases,\n      // create a new atlas that is twice as big and try to add to this one.\n      var size = (void 0);\n      if (isHitAtlas) {\n        size = Math.min(this.currentHitSize_ * 2, this.maxSize_);\n        this.currentHitSize_ = size;\n      } else {\n        size = Math.min(this.currentSize_ * 2, this.maxSize_);\n        this.currentSize_ = size;\n      }\n      atlas = new Atlas(size, this.space_);\n      atlases.push(atlas);\n      // run the loop another time\n      ++ii;\n    }\n  }\n  return null;\n};\n\nexport default AtlasManager;\n\n//# sourceMappingURL=AtlasManager.js.map","/**\n * @module ol/render/webgl/TextReplay\n */\nimport {getUid} from '../../util.js';\nimport {asColorLike} from '../../colorlike.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport GeometryType from '../../geom/GeometryType.js';\nimport {CANVAS_LINE_DASH} from '../../has.js';\nimport {TEXT_ALIGN} from '../replay.js';\nimport {DEFAULT_FILLSTYLE, DEFAULT_FONT, DEFAULT_LINECAP, DEFAULT_LINEDASH,\n  DEFAULT_LINEDASHOFFSET, DEFAULT_LINEJOIN, DEFAULT_LINEWIDTH, DEFAULT_MITERLIMIT,\n  DEFAULT_STROKESTYLE, DEFAULT_TEXTALIGN, DEFAULT_TEXTBASELINE} from '../webgl.js';\nimport WebGLTextureReplay from './TextureReplay.js';\nimport AtlasManager from '../../style/AtlasManager.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\n\n/**\n * @typedef {Object} GlyphAtlas\n * @property {import(\"../../style/AtlasManager.js\").default} atlas\n * @property {Object<string, number>} width\n * @property {number} height\n */\n\n\nvar WebGLTextReplay = /*@__PURE__*/(function (WebGLTextureReplay) {\n  function WebGLTextReplay(tolerance, maxExtent) {\n    WebGLTextureReplay.call(this, tolerance, maxExtent);\n\n    /**\n     * @private\n     * @type {Array<HTMLCanvasElement>}\n     */\n    this.images_ = [];\n\n    /**\n     * @private\n     * @type {Array<WebGLTexture>}\n     */\n    this.textures_ = [];\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.measureCanvas_ = createCanvasContext2D(0, 0).canvas;\n\n    /**\n     * @private\n     * @type {{strokeColor: (import(\"../../colorlike.js\").ColorLike|null),\n     *         lineCap: (string|undefined),\n     *         lineDash: Array<number>,\n     *         lineDashOffset: (number|undefined),\n     *         lineJoin: (string|undefined),\n     *         lineWidth: number,\n     *         miterLimit: (number|undefined),\n     *         fillColor: (import(\"../../colorlike.js\").ColorLike|null),\n     *         font: (string|undefined),\n     *         scale: (number|undefined)}}\n     */\n    this.state_ = {\n      strokeColor: null,\n      lineCap: undefined,\n      lineDash: null,\n      lineDashOffset: undefined,\n      lineJoin: undefined,\n      lineWidth: 0,\n      miterLimit: undefined,\n      fillColor: null,\n      font: undefined,\n      scale: undefined\n    };\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.text_ = '';\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.textAlign_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.textBaseline_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.offsetX_ = undefined;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.offsetY_ = undefined;\n\n    /**\n     * @private\n     * @type {Object<string, GlyphAtlas>}\n     */\n    this.atlases_ = {};\n\n    /**\n     * @private\n     * @type {GlyphAtlas|undefined}\n     */\n    this.currAtlas_ = undefined;\n\n    this.scale = 1;\n\n    this.opacity = 1;\n\n  }\n\n  if ( WebGLTextureReplay ) WebGLTextReplay.__proto__ = WebGLTextureReplay;\n  WebGLTextReplay.prototype = Object.create( WebGLTextureReplay && WebGLTextureReplay.prototype );\n  WebGLTextReplay.prototype.constructor = WebGLTextReplay;\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextReplay.prototype.drawText = function drawText (geometry, feature) {\n    if (this.text_) {\n      var flatCoordinates = null;\n      var offset = 0;\n      var end = 2;\n      var stride = 2;\n      switch (geometry.getType()) {\n        case GeometryType.POINT:\n        case GeometryType.MULTI_POINT:\n          flatCoordinates = geometry.getFlatCoordinates();\n          end = flatCoordinates.length;\n          stride = geometry.getStride();\n          break;\n        case GeometryType.CIRCLE:\n          flatCoordinates = /** @type {import(\"../../geom/Circle.js\").default} */ (geometry).getCenter();\n          break;\n        case GeometryType.LINE_STRING:\n          flatCoordinates = /** @type {import(\"../../geom/LineString.js\").default} */ (geometry).getFlatMidpoint();\n          break;\n        case GeometryType.MULTI_LINE_STRING:\n          flatCoordinates = /** @type {import(\"../../geom/MultiLineString.js\").default} */ (geometry).getFlatMidpoints();\n          end = flatCoordinates.length;\n          break;\n        case GeometryType.POLYGON:\n          flatCoordinates = /** @type {import(\"../../geom/Polygon.js\").default} */ (geometry).getFlatInteriorPoint();\n          break;\n        case GeometryType.MULTI_POLYGON:\n          flatCoordinates = /** @type {import(\"../../geom/MultiPolygon.js\").default} */ (geometry).getFlatInteriorPoints();\n          end = flatCoordinates.length;\n          break;\n        default:\n      }\n      this.startIndices.push(this.indices.length);\n      this.startIndicesFeature.push(feature);\n\n      var glyphAtlas = this.currAtlas_;\n      var lines = this.text_.split('\\n');\n      var textSize = this.getTextSize_(lines);\n      var i, ii, j, jj, currX, currY, charArr, charInfo;\n      var anchorX = Math.round(textSize[0] * this.textAlign_ - this.offsetX_);\n      var anchorY = Math.round(textSize[1] * this.textBaseline_ - this.offsetY_);\n      var lineWidth = (this.state_.lineWidth / 2) * this.state_.scale;\n\n      for (i = 0, ii = lines.length; i < ii; ++i) {\n        currX = 0;\n        currY = glyphAtlas.height * i;\n        charArr = lines[i].split('');\n\n        for (j = 0, jj = charArr.length; j < jj; ++j) {\n          charInfo = glyphAtlas.atlas.getInfo(charArr[j]);\n\n          if (charInfo) {\n            var image = charInfo.image;\n\n            this.anchorX = anchorX - currX;\n            this.anchorY = anchorY - currY;\n            this.originX = j === 0 ? charInfo.offsetX - lineWidth : charInfo.offsetX;\n            this.originY = charInfo.offsetY;\n            this.height = glyphAtlas.height;\n            this.width = j === 0 || j === charArr.length - 1 ?\n              glyphAtlas.width[charArr[j]] + lineWidth : glyphAtlas.width[charArr[j]];\n            this.imageHeight = image.height;\n            this.imageWidth = image.width;\n\n            if (this.images_.length === 0) {\n              this.images_.push(image);\n            } else {\n              var currentImage = this.images_[this.images_.length - 1];\n              if (getUid(currentImage) != getUid(image)) {\n                this.groupIndices.push(this.indices.length);\n                this.images_.push(image);\n              }\n            }\n\n            this.drawText_(flatCoordinates, offset, end, stride);\n          }\n          currX += this.width;\n        }\n      }\n    }\n  };\n\n  /**\n   * @private\n   * @param {Array<string>} lines Label to draw split to lines.\n   * @return {Array<number>} Size of the label in pixels.\n   */\n  WebGLTextReplay.prototype.getTextSize_ = function getTextSize_ (lines) {\n    var self = this;\n    var glyphAtlas = this.currAtlas_;\n    var textHeight = lines.length * glyphAtlas.height;\n    //Split every line to an array of chars, sum up their width, and select the longest.\n    var textWidth = lines.map(function(str) {\n      var sum = 0;\n      for (var i = 0, ii = str.length; i < ii; ++i) {\n        var curr = str[i];\n        if (!glyphAtlas.width[curr]) {\n          self.addCharToAtlas_(curr);\n        }\n        sum += glyphAtlas.width[curr] ? glyphAtlas.width[curr] : 0;\n      }\n      return sum;\n    }).reduce(function(max, curr) {\n      return Math.max(max, curr);\n    });\n\n    return [textWidth, textHeight];\n  };\n\n  /**\n   * @private\n   * @param {Array<number>} flatCoordinates Flat coordinates.\n   * @param {number} offset Offset.\n   * @param {number} end End.\n   * @param {number} stride Stride.\n   */\n  WebGLTextReplay.prototype.drawText_ = function drawText_ (flatCoordinates, offset, end, stride) {\n    for (var i = offset, ii = end; i < ii; i += stride) {\n      this.drawCoordinates(flatCoordinates, offset, end, stride);\n    }\n  };\n\n  /**\n   * @private\n   * @param {string} char Character.\n   */\n  WebGLTextReplay.prototype.addCharToAtlas_ = function addCharToAtlas_ (char) {\n    if (char.length === 1) {\n      var glyphAtlas = this.currAtlas_;\n      var state = this.state_;\n      var mCtx = this.measureCanvas_.getContext('2d');\n      mCtx.font = state.font;\n      var width = Math.ceil(mCtx.measureText(char).width * state.scale);\n\n      var info = glyphAtlas.atlas.add(char, width, glyphAtlas.height,\n        function(ctx, x, y) {\n          //Parameterize the canvas\n          ctx.font = /** @type {string} */ (state.font);\n          ctx.fillStyle = state.fillColor;\n          ctx.strokeStyle = state.strokeColor;\n          ctx.lineWidth = state.lineWidth;\n          ctx.lineCap = /** @type {CanvasLineCap} */ (state.lineCap);\n          ctx.lineJoin = /** @type {CanvasLineJoin} */ (state.lineJoin);\n          ctx.miterLimit = /** @type {number} */ (state.miterLimit);\n          ctx.textAlign = 'left';\n          ctx.textBaseline = 'top';\n          if (CANVAS_LINE_DASH && state.lineDash) {\n            //FIXME: use pixelRatio\n            ctx.setLineDash(state.lineDash);\n            ctx.lineDashOffset = /** @type {number} */ (state.lineDashOffset);\n          }\n          if (state.scale !== 1) {\n            //FIXME: use pixelRatio\n            ctx.setTransform(/** @type {number} */ (state.scale), 0, 0,\n              /** @type {number} */ (state.scale), 0, 0);\n          }\n\n          //Draw the character on the canvas\n          if (state.strokeColor) {\n            ctx.strokeText(char, x, y);\n          }\n          if (state.fillColor) {\n            ctx.fillText(char, x, y);\n          }\n        });\n\n      if (info) {\n        glyphAtlas.width[char] = width;\n      }\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextReplay.prototype.finish = function finish (context) {\n    var gl = context.getGL();\n\n    this.groupIndices.push(this.indices.length);\n    this.hitDetectionGroupIndices = this.groupIndices;\n\n    // create, bind, and populate the vertices buffer\n    this.verticesBuffer = new WebGLBuffer(this.vertices);\n\n    // create, bind, and populate the indices buffer\n    this.indicesBuffer = new WebGLBuffer(this.indices);\n\n    // create textures\n    /** @type {Object<string, WebGLTexture>} */\n    var texturePerImage = {};\n\n    this.createTextures(this.textures_, this.images_, texturePerImage, gl);\n\n    this.state_ = {\n      strokeColor: null,\n      lineCap: undefined,\n      lineDash: null,\n      lineDashOffset: undefined,\n      lineJoin: undefined,\n      lineWidth: 0,\n      miterLimit: undefined,\n      fillColor: null,\n      font: undefined,\n      scale: undefined\n    };\n    this.text_ = '';\n    this.textAlign_ = undefined;\n    this.textBaseline_ = undefined;\n    this.offsetX_ = undefined;\n    this.offsetY_ = undefined;\n    this.images_ = null;\n    this.atlases_ = {};\n    this.currAtlas_ = undefined;\n    WebGLTextureReplay.prototype.finish.call(this, context);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextReplay.prototype.setTextStyle = function setTextStyle (textStyle) {\n    var state = this.state_;\n    var textFillStyle = textStyle.getFill();\n    var textStrokeStyle = textStyle.getStroke();\n    if (!textStyle || !textStyle.getText() || (!textFillStyle && !textStrokeStyle)) {\n      this.text_ = '';\n    } else {\n      if (!textFillStyle) {\n        state.fillColor = null;\n      } else {\n        var textFillStyleColor = textFillStyle.getColor();\n        state.fillColor = asColorLike(textFillStyleColor ?\n          textFillStyleColor : DEFAULT_FILLSTYLE);\n      }\n      if (!textStrokeStyle) {\n        state.strokeColor = null;\n        state.lineWidth = 0;\n      } else {\n        var textStrokeStyleColor = textStrokeStyle.getColor();\n        state.strokeColor = asColorLike(textStrokeStyleColor ?\n          textStrokeStyleColor : DEFAULT_STROKESTYLE);\n        state.lineWidth = textStrokeStyle.getWidth() || DEFAULT_LINEWIDTH;\n        state.lineCap = textStrokeStyle.getLineCap() || DEFAULT_LINECAP;\n        state.lineDashOffset = textStrokeStyle.getLineDashOffset() || DEFAULT_LINEDASHOFFSET;\n        state.lineJoin = textStrokeStyle.getLineJoin() || DEFAULT_LINEJOIN;\n        state.miterLimit = textStrokeStyle.getMiterLimit() || DEFAULT_MITERLIMIT;\n        var lineDash = textStrokeStyle.getLineDash();\n        state.lineDash = lineDash ? lineDash.slice() : DEFAULT_LINEDASH;\n      }\n      state.font = textStyle.getFont() || DEFAULT_FONT;\n      state.scale = textStyle.getScale() || 1;\n      this.text_ = /** @type {string} */ (textStyle.getText());\n      var textAlign = TEXT_ALIGN[textStyle.getTextAlign()];\n      var textBaseline = TEXT_ALIGN[textStyle.getTextBaseline()];\n      this.textAlign_ = textAlign === undefined ?\n        DEFAULT_TEXTALIGN : textAlign;\n      this.textBaseline_ = textBaseline === undefined ?\n        DEFAULT_TEXTBASELINE : textBaseline;\n      this.offsetX_ = textStyle.getOffsetX() || 0;\n      this.offsetY_ = textStyle.getOffsetY() || 0;\n      this.rotateWithView = !!textStyle.getRotateWithView();\n      this.rotation = textStyle.getRotation() || 0;\n\n      this.currAtlas_ = this.getAtlas_(state);\n    }\n  };\n\n  /**\n   * @private\n   * @param {Object} state Font attributes.\n   * @return {GlyphAtlas} Glyph atlas.\n   */\n  WebGLTextReplay.prototype.getAtlas_ = function getAtlas_ (state) {\n    var params = [];\n    for (var i in state) {\n      if (state[i] || state[i] === 0) {\n        if (Array.isArray(state[i])) {\n          params = params.concat(state[i]);\n        } else {\n          params.push(state[i]);\n        }\n      }\n    }\n    var hash = this.calculateHash_(params);\n    if (!this.atlases_[hash]) {\n      var mCtx = this.measureCanvas_.getContext('2d');\n      mCtx.font = state.font;\n      var height = Math.ceil((mCtx.measureText('M').width * 1.5 +\n          state.lineWidth / 2) * state.scale);\n\n      this.atlases_[hash] = {\n        atlas: new AtlasManager({\n          space: state.lineWidth + 1\n        }),\n        width: {},\n        height: height\n      };\n    }\n    return this.atlases_[hash];\n  };\n\n  /**\n   * @private\n   * @param {Array<string|number>} params Array of parameters.\n   * @return {string} Hash string.\n   */\n  WebGLTextReplay.prototype.calculateHash_ = function calculateHash_ (params) {\n    //TODO: Create a more performant, reliable, general hash function.\n    var hash = '';\n    for (var i = 0, ii = params.length; i < ii; ++i) {\n      hash += params[i];\n    }\n    return hash;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextReplay.prototype.getTextures = function getTextures (opt_all) {\n    return this.textures_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTextReplay.prototype.getHitDetectionTextures = function getHitDetectionTextures () {\n    return this.textures_;\n  };\n\n  return WebGLTextReplay;\n}(WebGLTextureReplay));\n\n\nexport default WebGLTextReplay;\n\n//# sourceMappingURL=TextReplay.js.map","/**\n * @module ol/render/webgl/ReplayGroup\n */\n\nimport {numberSafeCompareFunction} from '../../array.js';\nimport {buffer, createOrUpdateFromCoordinate} from '../../extent.js';\nimport {isEmpty} from '../../obj.js';\nimport {ORDER} from '../replay.js';\nimport ReplayGroup from '../ReplayGroup.js';\nimport WebGLCircleReplay from './CircleReplay.js';\nimport WebGLImageReplay from './ImageReplay.js';\nimport WebGLLineStringReplay from './LineStringReplay.js';\nimport WebGLPolygonReplay from './PolygonReplay.js';\nimport WebGLTextReplay from './TextReplay.js';\n\n/**\n * @type {Array<number>}\n */\nvar HIT_DETECTION_SIZE = [1, 1];\n\n/**\n * @type {Object<import(\"../ReplayType.js\").default, typeof import(\"./Replay.js\").default>}\n */\nvar BATCH_CONSTRUCTORS = {\n  'Circle': WebGLCircleReplay,\n  'Image': WebGLImageReplay,\n  'LineString': WebGLLineStringReplay,\n  'Polygon': WebGLPolygonReplay,\n  'Text': WebGLTextReplay\n};\n\n\nvar WebGLReplayGroup = /*@__PURE__*/(function (ReplayGroup) {\n  function WebGLReplayGroup(tolerance, maxExtent, opt_renderBuffer) {\n    ReplayGroup.call(this);\n\n    /**\n     * @type {import(\"../../extent.js\").Extent}\n     * @private\n     */\n    this.maxExtent_ = maxExtent;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.tolerance_ = tolerance;\n\n    /**\n     * @type {number|undefined}\n     * @private\n     */\n    this.renderBuffer_ = opt_renderBuffer;\n\n    /**\n     * @private\n     * @type {!Object<string,\n     *        Object<import(\"../ReplayType.js\").default, import(\"./Replay.js\").default>>}\n     */\n    this.replaysByZIndex_ = {};\n\n  }\n\n  if ( ReplayGroup ) WebGLReplayGroup.__proto__ = ReplayGroup;\n  WebGLReplayGroup.prototype = Object.create( ReplayGroup && ReplayGroup.prototype );\n  WebGLReplayGroup.prototype.constructor = WebGLReplayGroup;\n\n  /**\n   * @inheritDoc\n   */\n  WebGLReplayGroup.prototype.addDeclutter = function addDeclutter (group) {\n    return [];\n  };\n\n  /**\n   * @param {import(\"../../webgl/Context.js\").default} context WebGL context.\n   * @return {function()} Delete resources function.\n   */\n  WebGLReplayGroup.prototype.getDeleteResourcesFunction = function getDeleteResourcesFunction (context) {\n    var functions = [];\n    var zKey;\n    for (zKey in this.replaysByZIndex_) {\n      var replays = this.replaysByZIndex_[zKey];\n      for (var replayKey in replays) {\n        functions.push(\n          replays[replayKey].getDeleteResourcesFunction(context));\n      }\n    }\n    return function() {\n      var arguments$1 = arguments;\n\n      var length = functions.length;\n      var result;\n      for (var i = 0; i < length; i++) {\n        result = functions[i].apply(this, arguments$1);\n      }\n      return result;\n    };\n  };\n\n  /**\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   */\n  WebGLReplayGroup.prototype.finish = function finish (context) {\n    var zKey;\n    for (zKey in this.replaysByZIndex_) {\n      var replays = this.replaysByZIndex_[zKey];\n      for (var replayKey in replays) {\n        replays[replayKey].finish(context);\n      }\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLReplayGroup.prototype.getReplay = function getReplay (zIndex, replayType) {\n    var zIndexKey = zIndex !== undefined ? zIndex.toString() : '0';\n    var replays = this.replaysByZIndex_[zIndexKey];\n    if (replays === undefined) {\n      replays = {};\n      this.replaysByZIndex_[zIndexKey] = replays;\n    }\n    var replay = replays[replayType];\n    if (replay === undefined) {\n      var Constructor = BATCH_CONSTRUCTORS[replayType];\n      replay = new Constructor(this.tolerance_, this.maxExtent_);\n      replays[replayType] = replay;\n    }\n    return replay;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLReplayGroup.prototype.isEmpty = function isEmpty$1 () {\n    return isEmpty(this.replaysByZIndex_);\n  };\n\n  /**\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {import(\"../../coordinate.js\").Coordinate} center Center.\n   * @param {number} resolution Resolution.\n   * @param {number} rotation Rotation.\n   * @param {import(\"../../size.js\").Size} size Size.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {number} opacity Global opacity.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   */\n  WebGLReplayGroup.prototype.replay = function replay (\n    context,\n    center,\n    resolution,\n    rotation,\n    size,\n    pixelRatio,\n    opacity,\n    skippedFeaturesHash\n  ) {\n    /** @type {Array<number>} */\n    var zs = Object.keys(this.replaysByZIndex_).map(Number);\n    zs.sort(numberSafeCompareFunction);\n\n    var i, ii, j, jj, replays, replay;\n    for (i = 0, ii = zs.length; i < ii; ++i) {\n      replays = this.replaysByZIndex_[zs[i].toString()];\n      for (j = 0, jj = ORDER.length; j < jj; ++j) {\n        replay = replays[ORDER[j]];\n        if (replay !== undefined) {\n          replay.replay(context,\n            center, resolution, rotation, size, pixelRatio,\n            opacity, skippedFeaturesHash,\n            undefined, false);\n        }\n      }\n    }\n  };\n\n  /**\n   * @private\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {import(\"../../coordinate.js\").Coordinate} center Center.\n   * @param {number} resolution Resolution.\n   * @param {number} rotation Rotation.\n   * @param {import(\"../../size.js\").Size} size Size.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {number} opacity Global opacity.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   * @param {function((import(\"../../Feature.js\").default|import(\"../Feature.js\").default)): T|undefined} featureCallback Feature callback.\n   * @param {boolean} oneByOne Draw features one-by-one for the hit-detecion.\n   * @param {import(\"../../extent.js\").Extent=} opt_hitExtent Hit extent: Only features intersecting\n   *  this extent are checked.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  WebGLReplayGroup.prototype.replayHitDetection_ = function replayHitDetection_ (\n    context,\n    center,\n    resolution,\n    rotation,\n    size,\n    pixelRatio,\n    opacity,\n    skippedFeaturesHash,\n    featureCallback,\n    oneByOne,\n    opt_hitExtent\n  ) {\n    /** @type {Array<number>} */\n    var zs = Object.keys(this.replaysByZIndex_).map(Number);\n    zs.sort(function(a, b) {\n      return b - a;\n    });\n\n    var i, ii, j, replays, replay, result;\n    for (i = 0, ii = zs.length; i < ii; ++i) {\n      replays = this.replaysByZIndex_[zs[i].toString()];\n      for (j = ORDER.length - 1; j >= 0; --j) {\n        replay = replays[ORDER[j]];\n        if (replay !== undefined) {\n          result = replay.replay(context,\n            center, resolution, rotation, size, pixelRatio, opacity,\n            skippedFeaturesHash, featureCallback, oneByOne, opt_hitExtent);\n          if (result) {\n            return result;\n          }\n        }\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {import(\"../../coordinate.js\").Coordinate} center Center.\n   * @param {number} resolution Resolution.\n   * @param {number} rotation Rotation.\n   * @param {import(\"../../size.js\").Size} size Size.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {number} opacity Global opacity.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   * @param {function((import(\"../../Feature.js\").default|import(\"../Feature.js\").default)): T|undefined} callback Feature callback.\n   * @return {T|undefined} Callback result.\n   * @template T\n   */\n  WebGLReplayGroup.prototype.forEachFeatureAtCoordinate = function forEachFeatureAtCoordinate (\n    coordinate,\n    context,\n    center,\n    resolution,\n    rotation,\n    size,\n    pixelRatio,\n    opacity,\n    skippedFeaturesHash,\n    callback\n  ) {\n    var gl = context.getGL();\n    gl.bindFramebuffer(\n      gl.FRAMEBUFFER, context.getHitDetectionFramebuffer());\n\n\n    /**\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    var hitExtent;\n    if (this.renderBuffer_ !== undefined) {\n      // build an extent around the coordinate, so that only features that\n      // intersect this extent are checked\n      hitExtent = buffer(createOrUpdateFromCoordinate(coordinate), resolution * this.renderBuffer_);\n    }\n\n    return this.replayHitDetection_(context,\n      coordinate, resolution, rotation, HIT_DETECTION_SIZE,\n      pixelRatio, opacity, skippedFeaturesHash,\n      /**\n       * @param {import(\"../../Feature.js\").default|import(\"../Feature.js\").default} feature Feature.\n       * @return {?} Callback result.\n       */\n      function(feature) {\n        var imageData = new Uint8Array(4);\n        gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, imageData);\n\n        if (imageData[3] > 0) {\n          var result = callback(feature);\n          if (result) {\n            return result;\n          }\n        }\n      }, true, hitExtent);\n  };\n\n  /**\n   * @param {import(\"../../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @param {import(\"../../coordinate.js\").Coordinate} center Center.\n   * @param {number} resolution Resolution.\n   * @param {number} rotation Rotation.\n   * @param {import(\"../../size.js\").Size} size Size.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {number} opacity Global opacity.\n   * @param {Object<string, boolean>} skippedFeaturesHash Ids of features to skip.\n   * @return {boolean} Is there a feature at the given coordinate?\n   */\n  WebGLReplayGroup.prototype.hasFeatureAtCoordinate = function hasFeatureAtCoordinate (\n    coordinate,\n    context,\n    center,\n    resolution,\n    rotation,\n    size,\n    pixelRatio,\n    opacity,\n    skippedFeaturesHash\n  ) {\n    var gl = context.getGL();\n    gl.bindFramebuffer(\n      gl.FRAMEBUFFER, context.getHitDetectionFramebuffer());\n\n    var hasFeature = this.replayHitDetection_(context,\n      coordinate, resolution, rotation, HIT_DETECTION_SIZE,\n      pixelRatio, opacity, skippedFeaturesHash,\n      /**\n       * @param {import(\"../../Feature.js\").default|import(\"../Feature.js\").default} feature Feature.\n       * @return {boolean} Is there a feature?\n       */\n      function(feature) {\n        var imageData = new Uint8Array(4);\n        gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, imageData);\n        return imageData[3] > 0;\n      }, false);\n\n    return hasFeature !== undefined;\n  };\n\n  return WebGLReplayGroup;\n}(ReplayGroup));\n\n\nexport default WebGLReplayGroup;\n\n//# sourceMappingURL=ReplayGroup.js.map","/**\n * @module ol/render/webgl/Immediate\n */\n\nimport {intersects} from '../../extent.js';\nimport GeometryType from '../../geom/GeometryType.js';\nimport ReplayType from '../ReplayType.js';\nimport VectorContext from '../VectorContext.js';\nimport WebGLReplayGroup from './ReplayGroup.js';\n\nvar WebGLImmediateRenderer = /*@__PURE__*/(function (VectorContext) {\n  function WebGLImmediateRenderer(context, center, resolution, rotation, size, extent, pixelRatio) {\n    VectorContext.call(this);\n\n    /**\n     * @private\n     */\n    this.context_ = context;\n\n    /**\n     * @private\n     */\n    this.center_ = center;\n\n    /**\n     * @private\n     */\n    this.extent_ = extent;\n\n    /**\n     * @private\n     */\n    this.pixelRatio_ = pixelRatio;\n\n    /**\n     * @private\n     */\n    this.size_ = size;\n\n    /**\n     * @private\n     */\n    this.rotation_ = rotation;\n\n    /**\n     * @private\n     */\n    this.resolution_ = resolution;\n\n    /**\n     * @private\n     * @type {import(\"../../style/Image.js\").default}\n     */\n    this.imageStyle_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../style/Fill.js\").default}\n     */\n    this.fillStyle_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../style/Stroke.js\").default}\n     */\n    this.strokeStyle_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../style/Text.js\").default}\n     */\n    this.textStyle_ = null;\n\n  }\n\n  if ( VectorContext ) WebGLImmediateRenderer.__proto__ = VectorContext;\n  WebGLImmediateRenderer.prototype = Object.create( VectorContext && VectorContext.prototype );\n  WebGLImmediateRenderer.prototype.constructor = WebGLImmediateRenderer;\n\n  /**\n   * @param {import(\"./ReplayGroup.js\").default} replayGroup Replay group.\n   * @param {import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default} geometry Geometry.\n   * @private\n   */\n  WebGLImmediateRenderer.prototype.drawText_ = function drawText_ (replayGroup, geometry) {\n    var context = this.context_;\n    var replay = /** @type {import(\"./TextReplay.js\").default} */ (\n      replayGroup.getReplay(0, ReplayType.TEXT));\n    replay.setTextStyle(this.textStyle_);\n    replay.drawText(geometry, null);\n    replay.finish(context);\n    // default colors\n    var opacity = 1;\n    /** @type {Object<string, boolean>} */\n    var skippedFeatures = {};\n    var featureCallback;\n    var oneByOne = false;\n    replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n      this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n      oneByOne);\n    replay.getDeleteResourcesFunction(context)();\n  };\n\n  /**\n   * Set the rendering style.  Note that since this is an immediate rendering API,\n   * any `zIndex` on the provided style will be ignored.\n   *\n   * @param {import(\"../../style/Style.js\").default} style The rendering style.\n   * @override\n   * @api\n   */\n  WebGLImmediateRenderer.prototype.setStyle = function setStyle (style) {\n    this.setFillStrokeStyle(style.getFill(), style.getStroke());\n    this.setImageStyle(style.getImage());\n    this.setTextStyle(style.getText());\n  };\n\n  /**\n   * Render a geometry into the canvas.  Call\n   * {@link ol/render/webgl/Immediate#setStyle} first to set the rendering style.\n   *\n   * @param {import(\"../../geom/Geometry.js\").default|import(\"../Feature.js\").default} geometry The geometry to render.\n   * @override\n   * @api\n   */\n  WebGLImmediateRenderer.prototype.drawGeometry = function drawGeometry (geometry) {\n    var type = geometry.getType();\n    switch (type) {\n      case GeometryType.POINT:\n        this.drawPoint(/** @type {import(\"../../geom/Point.js\").default} */ (geometry), null);\n        break;\n      case GeometryType.LINE_STRING:\n        this.drawLineString(/** @type {import(\"../../geom/LineString.js\").default} */ (geometry), null);\n        break;\n      case GeometryType.POLYGON:\n        this.drawPolygon(/** @type {import(\"../../geom/Polygon.js\").default} */ (geometry), null);\n        break;\n      case GeometryType.MULTI_POINT:\n        this.drawMultiPoint(/** @type {import(\"../../geom/MultiPoint.js\").default} */ (geometry), null);\n        break;\n      case GeometryType.MULTI_LINE_STRING:\n        this.drawMultiLineString(/** @type {import(\"../../geom/MultiLineString.js\").default} */ (geometry), null);\n        break;\n      case GeometryType.MULTI_POLYGON:\n        this.drawMultiPolygon(/** @type {import(\"../../geom/MultiPolygon.js\").default} */ (geometry), null);\n        break;\n      case GeometryType.GEOMETRY_COLLECTION:\n        this.drawGeometryCollection(/** @type {import(\"../../geom/GeometryCollection.js\").default} */ (geometry), null);\n        break;\n      case GeometryType.CIRCLE:\n        this.drawCircle(/** @type {import(\"../../geom/Circle.js\").default} */ (geometry), null);\n        break;\n      default:\n        // pass\n    }\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  WebGLImmediateRenderer.prototype.drawFeature = function drawFeature (feature, style) {\n    var geometry = style.getGeometryFunction()(feature);\n    if (!geometry || !intersects(this.extent_, geometry.getExtent())) {\n      return;\n    }\n    this.setStyle(style);\n    this.drawGeometry(geometry);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.drawGeometryCollection = function drawGeometryCollection (geometry, data) {\n    var geometries = geometry.getGeometriesArray();\n    var i, ii;\n    for (i = 0, ii = geometries.length; i < ii; ++i) {\n      this.drawGeometry(geometries[i]);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.drawPoint = function drawPoint (geometry, data) {\n    var context = this.context_;\n    var replayGroup = new WebGLReplayGroup(1, this.extent_);\n    var replay = /** @type {import(\"./ImageReplay.js\").default} */ (\n      replayGroup.getReplay(0, ReplayType.IMAGE));\n    replay.setImageStyle(this.imageStyle_);\n    replay.drawPoint(geometry, data);\n    replay.finish(context);\n    // default colors\n    var opacity = 1;\n    /** @type {Object<string, boolean>} */\n    var skippedFeatures = {};\n    var featureCallback;\n    var oneByOne = false;\n    replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n      this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n      oneByOne);\n    replay.getDeleteResourcesFunction(context)();\n\n    if (this.textStyle_) {\n      this.drawText_(replayGroup, geometry);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.drawMultiPoint = function drawMultiPoint (geometry, data) {\n    var context = this.context_;\n    var replayGroup = new WebGLReplayGroup(1, this.extent_);\n    var replay = /** @type {import(\"./ImageReplay.js\").default} */ (\n      replayGroup.getReplay(0, ReplayType.IMAGE));\n    replay.setImageStyle(this.imageStyle_);\n    replay.drawMultiPoint(geometry, data);\n    replay.finish(context);\n    var opacity = 1;\n    /** @type {Object<string, boolean>} */\n    var skippedFeatures = {};\n    var featureCallback;\n    var oneByOne = false;\n    replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n      this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n      oneByOne);\n    replay.getDeleteResourcesFunction(context)();\n\n    if (this.textStyle_) {\n      this.drawText_(replayGroup, geometry);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.drawLineString = function drawLineString (geometry, data) {\n    var context = this.context_;\n    var replayGroup = new WebGLReplayGroup(1, this.extent_);\n    var replay = /** @type {import(\"./LineStringReplay.js\").default} */ (\n      replayGroup.getReplay(0, ReplayType.LINE_STRING));\n    replay.setFillStrokeStyle(null, this.strokeStyle_);\n    replay.drawLineString(geometry, data);\n    replay.finish(context);\n    var opacity = 1;\n    /** @type {Object<string, boolean>} */\n    var skippedFeatures = {};\n    var featureCallback;\n    var oneByOne = false;\n    replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n      this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n      oneByOne);\n    replay.getDeleteResourcesFunction(context)();\n\n    if (this.textStyle_) {\n      this.drawText_(replayGroup, geometry);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.drawMultiLineString = function drawMultiLineString (geometry, data) {\n    var context = this.context_;\n    var replayGroup = new WebGLReplayGroup(1, this.extent_);\n    var replay = /** @type {import(\"./LineStringReplay.js\").default} */ (\n      replayGroup.getReplay(0, ReplayType.LINE_STRING));\n    replay.setFillStrokeStyle(null, this.strokeStyle_);\n    replay.drawMultiLineString(geometry, data);\n    replay.finish(context);\n    var opacity = 1;\n    /** @type {Object<string, boolean>} */\n    var skippedFeatures = {};\n    var featureCallback;\n    var oneByOne = false;\n    replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n      this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n      oneByOne);\n    replay.getDeleteResourcesFunction(context)();\n\n    if (this.textStyle_) {\n      this.drawText_(replayGroup, geometry);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.drawPolygon = function drawPolygon (geometry, data) {\n    var context = this.context_;\n    var replayGroup = new WebGLReplayGroup(1, this.extent_);\n    var replay = /** @type {import(\"./PolygonReplay.js\").default} */ (\n      replayGroup.getReplay(0, ReplayType.POLYGON));\n    replay.setFillStrokeStyle(this.fillStyle_, this.strokeStyle_);\n    replay.drawPolygon(geometry, data);\n    replay.finish(context);\n    var opacity = 1;\n    /** @type {Object<string, boolean>} */\n    var skippedFeatures = {};\n    var featureCallback;\n    var oneByOne = false;\n    replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n      this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n      oneByOne);\n    replay.getDeleteResourcesFunction(context)();\n\n    if (this.textStyle_) {\n      this.drawText_(replayGroup, geometry);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.drawMultiPolygon = function drawMultiPolygon (geometry, data) {\n    var context = this.context_;\n    var replayGroup = new WebGLReplayGroup(1, this.extent_);\n    var replay = /** @type {import(\"./PolygonReplay.js\").default} */ (\n      replayGroup.getReplay(0, ReplayType.POLYGON));\n    replay.setFillStrokeStyle(this.fillStyle_, this.strokeStyle_);\n    replay.drawMultiPolygon(geometry, data);\n    replay.finish(context);\n    var opacity = 1;\n    /** @type {Object<string, boolean>} */\n    var skippedFeatures = {};\n    var featureCallback;\n    var oneByOne = false;\n    replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n      this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n      oneByOne);\n    replay.getDeleteResourcesFunction(context)();\n\n    if (this.textStyle_) {\n      this.drawText_(replayGroup, geometry);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.drawCircle = function drawCircle (geometry, data) {\n    var context = this.context_;\n    var replayGroup = new WebGLReplayGroup(1, this.extent_);\n    var replay = /** @type {import(\"./CircleReplay.js\").default} */ (\n      replayGroup.getReplay(0, ReplayType.CIRCLE));\n    replay.setFillStrokeStyle(this.fillStyle_, this.strokeStyle_);\n    replay.drawCircle(geometry, data);\n    replay.finish(context);\n    var opacity = 1;\n    /** @type {Object<string, boolean>} */\n    var skippedFeatures = {};\n    var featureCallback;\n    var oneByOne = false;\n    replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n      this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n      oneByOne);\n    replay.getDeleteResourcesFunction(context)();\n\n    if (this.textStyle_) {\n      this.drawText_(replayGroup, geometry);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.setImageStyle = function setImageStyle (imageStyle) {\n    this.imageStyle_ = imageStyle;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.setFillStrokeStyle = function setFillStrokeStyle (fillStyle, strokeStyle) {\n    this.fillStyle_ = fillStyle;\n    this.strokeStyle_ = strokeStyle;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImmediateRenderer.prototype.setTextStyle = function setTextStyle (textStyle) {\n    this.textStyle_ = textStyle;\n  };\n\n  return WebGLImmediateRenderer;\n}(VectorContext));\n\n\nexport default WebGLImmediateRenderer;\n\n//# sourceMappingURL=Immediate.js.map","/**\n * @module ol/renderer/webgl/defaultmapshader\n */\n// This file is automatically generated, do not edit.\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../webgl.js';\nimport WebGLFragment from '../../webgl/Fragment.js';\nimport WebGLVertex from '../../webgl/Vertex.js';\n\nexport var fragment = new WebGLFragment(DEBUG_WEBGL ?\n  'precision mediump float;\\nvarying vec2 v_texCoord;\\n\\n\\nuniform float u_opacity;\\nuniform sampler2D u_texture;\\n\\nvoid main(void) {\\n  vec4 texColor = texture2D(u_texture, v_texCoord);\\n  gl_FragColor.rgb = texColor.rgb;\\n  gl_FragColor.a = texColor.a * u_opacity;\\n}\\n' :\n  'precision mediump float;varying vec2 a;uniform float f;uniform sampler2D g;void main(void){vec4 texColor=texture2D(g,a);gl_FragColor.rgb=texColor.rgb;gl_FragColor.a=texColor.a*f;}');\n\nexport var vertex = new WebGLVertex(DEBUG_WEBGL ?\n  'varying vec2 v_texCoord;\\n\\n\\nattribute vec2 a_position;\\nattribute vec2 a_texCoord;\\n\\nuniform mat4 u_texCoordMatrix;\\nuniform mat4 u_projectionMatrix;\\n\\nvoid main(void) {\\n  gl_Position = u_projectionMatrix * vec4(a_position, 0., 1.);\\n  v_texCoord = (u_texCoordMatrix * vec4(a_texCoord, 0., 1.)).st;\\n}\\n\\n\\n' :\n  'varying vec2 a;attribute vec2 b;attribute vec2 c;uniform mat4 d;uniform mat4 e;void main(void){gl_Position=e*vec4(b,0.,1.);a=(d*vec4(c,0.,1.)).st;}');\n\n//# sourceMappingURL=defaultmapshader.js.map","/**\n * @module ol/renderer/webgl/defaultmapshader/Locations\n */\n// This file is automatically generated, do not edit\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../webgl.js';\n\nvar Locations = function Locations(gl, program) {\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_texCoordMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_texCoordMatrix' : 'd');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_projectionMatrix = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_projectionMatrix' : 'e');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_opacity = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_opacity' : 'f');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_texture = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_texture' : 'g');\n\n  /**\n   * @type {number}\n   */\n  this.a_position = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_position' : 'b');\n\n  /**\n   * @type {number}\n   */\n  this.a_texCoord = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_texCoord' : 'c');\n\n};\n\nexport default Locations;\n\n//# sourceMappingURL=Locations.js.map","/**\n * @module ol/renderer/webgl/Layer\n */\nimport {abstract} from '../../util.js';\nimport RenderEvent from '../../render/Event.js';\nimport RenderEventType from '../../render/EventType.js';\nimport WebGLImmediateRenderer from '../../render/webgl/Immediate.js';\nimport LayerRenderer from '../Layer.js';\nimport {fragment, vertex} from './defaultmapshader.js';\nimport Locations from './defaultmapshader/Locations.js';\nimport {create as createTransform} from '../../transform.js';\nimport {create, fromTransform} from '../../vec/mat4.js';\nimport {ARRAY_BUFFER, FRAMEBUFFER, FLOAT, TEXTURE_2D,\n  TRIANGLE_STRIP, COLOR_ATTACHMENT0} from '../../webgl.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\nimport {createEmptyTexture} from '../../webgl/Context.js';\n\n/**\n * @abstract\n */\nvar WebGLLayerRenderer = /*@__PURE__*/(function (LayerRenderer) {\n  function WebGLLayerRenderer(mapRenderer, layer) {\n\n    LayerRenderer.call(this, layer);\n\n    /**\n     * @protected\n     * @type {import(\"./Map.js\").default}\n     */\n    this.mapRenderer = mapRenderer;\n\n    /**\n     * @private\n     * @type {import(\"../../webgl/Buffer.js\").default}\n     */\n    this.arrayBuffer_ = new WebGLBuffer([\n      -1, -1, 0, 0,\n      1, -1, 1, 0,\n      -1, 1, 0, 1,\n      1, 1, 1, 1\n    ]);\n\n    /**\n     * @protected\n     * @type {WebGLTexture}\n     */\n    this.texture = null;\n\n    /**\n     * @protected\n     * @type {WebGLFramebuffer}\n     */\n    this.framebuffer = null;\n\n    /**\n     * @protected\n     * @type {number|undefined}\n     */\n    this.framebufferDimension = undefined;\n\n    /**\n     * @protected\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.texCoordMatrix = createTransform();\n\n    /**\n     * @protected\n     * @type {import(\"../../transform.js\").Transform}\n     */\n    this.projectionMatrix = createTransform();\n\n    /**\n     * @type {Array<number>}\n     * @private\n     */\n    this.tmpMat4_ = create();\n\n    /**\n     * @private\n     * @type {import(\"./defaultmapshader/Locations.js\").default}\n     */\n    this.defaultLocations_ = null;\n\n  }\n\n  if ( LayerRenderer ) WebGLLayerRenderer.__proto__ = LayerRenderer;\n  WebGLLayerRenderer.prototype = Object.create( LayerRenderer && LayerRenderer.prototype );\n  WebGLLayerRenderer.prototype.constructor = WebGLLayerRenderer;\n\n  /**\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {number} framebufferDimension Framebuffer dimension.\n   * @protected\n   */\n  WebGLLayerRenderer.prototype.bindFramebuffer = function bindFramebuffer (frameState, framebufferDimension) {\n\n    var gl = this.mapRenderer.getGL();\n\n    if (this.framebufferDimension === undefined ||\n        this.framebufferDimension != framebufferDimension) {\n      /**\n       * @param {WebGLRenderingContext} gl GL.\n       * @param {WebGLFramebuffer} framebuffer Framebuffer.\n       * @param {WebGLTexture} texture Texture.\n       */\n      var postRenderFunction = function(gl, framebuffer, texture) {\n        if (!gl.isContextLost()) {\n          gl.deleteFramebuffer(framebuffer);\n          gl.deleteTexture(texture);\n        }\n      }.bind(null, gl, this.framebuffer, this.texture);\n\n      frameState.postRenderFunctions.push(\n        /** @type {import(\"../../PluggableMap.js\").PostRenderFunction} */ (postRenderFunction)\n      );\n\n      var texture = createEmptyTexture(\n        gl, framebufferDimension, framebufferDimension);\n\n      var framebuffer = gl.createFramebuffer();\n      gl.bindFramebuffer(FRAMEBUFFER, framebuffer);\n      gl.framebufferTexture2D(FRAMEBUFFER,\n        COLOR_ATTACHMENT0, TEXTURE_2D, texture, 0);\n\n      this.texture = texture;\n      this.framebuffer = framebuffer;\n      this.framebufferDimension = framebufferDimension;\n\n    } else {\n      gl.bindFramebuffer(FRAMEBUFFER, this.framebuffer);\n    }\n\n  };\n\n  /**\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../layer/Layer.js\").State} layerState Layer state.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   */\n  WebGLLayerRenderer.prototype.composeFrame = function composeFrame (frameState, layerState, context) {\n\n    this.dispatchComposeEvent_(RenderEventType.PRECOMPOSE, context, frameState);\n\n    context.bindBuffer(ARRAY_BUFFER, this.arrayBuffer_);\n\n    var gl = context.getGL();\n\n    var program = context.getProgram(fragment, vertex);\n\n    var locations;\n    if (!this.defaultLocations_) {\n      locations = new Locations(gl, program);\n      this.defaultLocations_ = locations;\n    } else {\n      locations = this.defaultLocations_;\n    }\n\n    if (context.useProgram(program)) {\n      gl.enableVertexAttribArray(locations.a_position);\n      gl.vertexAttribPointer(\n        locations.a_position, 2, FLOAT, false, 16, 0);\n      gl.enableVertexAttribArray(locations.a_texCoord);\n      gl.vertexAttribPointer(\n        locations.a_texCoord, 2, FLOAT, false, 16, 8);\n      gl.uniform1i(locations.u_texture, 0);\n    }\n\n    gl.uniformMatrix4fv(locations.u_texCoordMatrix, false,\n      fromTransform(this.tmpMat4_, this.getTexCoordMatrix()));\n    gl.uniformMatrix4fv(locations.u_projectionMatrix, false,\n      fromTransform(this.tmpMat4_, this.getProjectionMatrix()));\n    gl.uniform1f(locations.u_opacity, layerState.opacity);\n    gl.bindTexture(TEXTURE_2D, this.getTexture());\n    gl.drawArrays(TRIANGLE_STRIP, 0, 4);\n\n    this.dispatchComposeEvent_(RenderEventType.POSTCOMPOSE, context, frameState);\n  };\n\n  /**\n   * @param {import(\"../../render/EventType.js\").default} type Event type.\n   * @param {import(\"../../webgl/Context.js\").default} context WebGL context.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @private\n   */\n  WebGLLayerRenderer.prototype.dispatchComposeEvent_ = function dispatchComposeEvent_ (type, context, frameState) {\n    var layer = this.getLayer();\n    if (layer.hasListener(type)) {\n      var viewState = frameState.viewState;\n      var resolution = viewState.resolution;\n      var pixelRatio = frameState.pixelRatio;\n      var extent = frameState.extent;\n      var center = viewState.center;\n      var rotation = viewState.rotation;\n      var size = frameState.size;\n\n      var render = new WebGLImmediateRenderer(\n        context, center, resolution, rotation, size, extent, pixelRatio);\n      var composeEvent = new RenderEvent(\n        type, render, frameState, null, context);\n      layer.dispatchEvent(composeEvent);\n    }\n  };\n\n  /**\n   * @return {!import(\"../../transform.js\").Transform} Matrix.\n   */\n  WebGLLayerRenderer.prototype.getTexCoordMatrix = function getTexCoordMatrix () {\n    return this.texCoordMatrix;\n  };\n\n  /**\n   * @return {WebGLTexture} Texture.\n   */\n  WebGLLayerRenderer.prototype.getTexture = function getTexture () {\n    return this.texture;\n  };\n\n  /**\n   * @return {!import(\"../../transform.js\").Transform} Matrix.\n   */\n  WebGLLayerRenderer.prototype.getProjectionMatrix = function getProjectionMatrix () {\n    return this.projectionMatrix;\n  };\n\n  /**\n   * Handle webglcontextlost.\n   */\n  WebGLLayerRenderer.prototype.handleWebGLContextLost = function handleWebGLContextLost () {\n    this.texture = null;\n    this.framebuffer = null;\n    this.framebufferDimension = undefined;\n  };\n\n  /**\n   * @abstract\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @param {import(\"../../layer/Layer.js\").State} layerState Layer state.\n   * @param {import(\"../../webgl/Context.js\").default} context Context.\n   * @return {boolean} whether composeFrame should be called.\n   */\n  WebGLLayerRenderer.prototype.prepareFrame = function prepareFrame (frameState, layerState, context) {\n    return abstract();\n  };\n\n  /**\n   * @abstract\n   * @param {import(\"../../pixel.js\").Pixel} pixel Pixel.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState FrameState.\n   * @param {function(this: S, import(\"../../layer/Layer.js\").default, (Uint8ClampedArray|Uint8Array)): T} callback Layer\n   *     callback.\n   * @param {S} thisArg Value to use as `this` when executing `callback`.\n   * @return {T|undefined} Callback result.\n   * @template S,T,U\n   */\n  WebGLLayerRenderer.prototype.forEachLayerAtPixel = function forEachLayerAtPixel (pixel, frameState, callback, thisArg) {\n    return abstract();\n  };\n\n  return WebGLLayerRenderer;\n}(LayerRenderer));\n\n\nexport default WebGLLayerRenderer;\n\n//# sourceMappingURL=Layer.js.map","/**\n * @module ol/renderer/webgl/ImageLayer\n */\nimport {ENABLE_RASTER_REPROJECTION} from '../../reproj/common.js';\nimport LayerType from '../../LayerType.js';\nimport ViewHint from '../../ViewHint.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {getIntersection, isEmpty} from '../../extent.js';\nimport WebGLLayerRenderer from './Layer.js';\nimport {\n  create as createTransform,\n  rotate as rotateTransform,\n  translate as translateTransform,\n  scale as scaleTransform,\n  reset as resetTransform,\n  apply as applyTransform,\n  invert as invertTransform,\n  multiply as multiplyTransform\n} from '../../transform.js';\nimport {CLAMP_TO_EDGE} from '../../webgl.js';\nimport {createTexture} from '../../webgl/Context.js';\n\n/**\n * @classdesc\n * WebGL renderer for image layers.\n * @api\n */\nvar WebGLImageLayerRenderer = /*@__PURE__*/(function (WebGLLayerRenderer) {\n  function WebGLImageLayerRenderer(mapRenderer, imageLayer) {\n\n    WebGLLayerRenderer.call(this, mapRenderer, imageLayer);\n\n    /**\n     * The last rendered image.\n     * @private\n     * @type {?import(\"../../ImageBase.js\").default}\n     */\n    this.image_ = null;\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.hitCanvasContext_ = null;\n\n    /**\n     * @private\n     * @type {?import(\"../../transform.js\").Transform}\n     */\n    this.hitTransformationMatrix_ = null;\n\n  }\n\n  if ( WebGLLayerRenderer ) WebGLImageLayerRenderer.__proto__ = WebGLLayerRenderer;\n  WebGLImageLayerRenderer.prototype = Object.create( WebGLLayerRenderer && WebGLLayerRenderer.prototype );\n  WebGLImageLayerRenderer.prototype.constructor = WebGLImageLayerRenderer;\n\n  /**\n   * @param {import(\"../../ImageBase.js\").default} image Image.\n   * @private\n   * @return {WebGLTexture} Texture.\n   */\n  WebGLImageLayerRenderer.prototype.createTexture_ = function createTexture_ (image) {\n\n    // We meet the conditions to work with non-power of two textures.\n    // http://www.khronos.org/webgl/wiki/WebGL_and_OpenGL_Differences#Non-Power_of_Two_Texture_Support\n    // http://learningwebgl.com/blog/?p=2101\n\n    var imageElement = image.getImage();\n    var gl = this.mapRenderer.getGL();\n\n    return createTexture(\n      gl, imageElement, CLAMP_TO_EDGE, CLAMP_TO_EDGE);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImageLayerRenderer.prototype.prepareFrame = function prepareFrame (frameState, layerState, context) {\n\n    var gl = this.mapRenderer.getGL();\n\n    var pixelRatio = frameState.pixelRatio;\n    var viewState = frameState.viewState;\n    var viewCenter = viewState.center;\n    var viewResolution = viewState.resolution;\n    var viewRotation = viewState.rotation;\n\n    var image = this.image_;\n    var texture = this.texture;\n    var imageLayer = /** @type {import(\"../../layer/Image.js\").default} */ (this.getLayer());\n    var imageSource = /** @type {import(\"../../source/Image.js\").default} */ (imageLayer.getSource());\n\n    var hints = frameState.viewHints;\n\n    var renderedExtent = frameState.extent;\n    if (layerState.extent !== undefined) {\n      renderedExtent = getIntersection(renderedExtent, layerState.extent);\n    }\n    if (!hints[ViewHint.ANIMATING] && !hints[ViewHint.INTERACTING] &&\n        !isEmpty(renderedExtent)) {\n      var projection = viewState.projection;\n      if (!ENABLE_RASTER_REPROJECTION) {\n        var sourceProjection = imageSource.getProjection();\n        if (sourceProjection) {\n          projection = sourceProjection;\n        }\n      }\n      var image_ = imageSource.getImage(renderedExtent, viewResolution,\n        pixelRatio, projection);\n      if (image_) {\n        var loaded = this.loadImage(image_);\n        if (loaded) {\n          image = image_;\n          texture = this.createTexture_(image_);\n          if (this.texture) {\n            /**\n             * @param {WebGLRenderingContext} gl GL.\n             * @param {WebGLTexture} texture Texture.\n             */\n            var postRenderFunction = function(gl, texture) {\n              if (!gl.isContextLost()) {\n                gl.deleteTexture(texture);\n              }\n            }.bind(null, gl, this.texture);\n            frameState.postRenderFunctions.push(\n              /** @type {import(\"../../PluggableMap.js\").PostRenderFunction} */ (postRenderFunction)\n            );\n          }\n        }\n      }\n    }\n\n    if (image) {\n      var canvas = this.mapRenderer.getContext().getCanvas();\n\n      this.updateProjectionMatrix_(canvas.width, canvas.height,\n        pixelRatio, viewCenter, viewResolution, viewRotation,\n        image.getExtent());\n      this.hitTransformationMatrix_ = null;\n\n      // Translate and scale to flip the Y coord.\n      var texCoordMatrix = this.texCoordMatrix;\n      resetTransform(texCoordMatrix);\n      scaleTransform(texCoordMatrix, 1, -1);\n      translateTransform(texCoordMatrix, 0, -1);\n\n      this.image_ = image;\n      this.texture = texture;\n    }\n\n    return !!image;\n  };\n\n  /**\n   * @param {number} canvasWidth Canvas width.\n   * @param {number} canvasHeight Canvas height.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../../coordinate.js\").Coordinate} viewCenter View center.\n   * @param {number} viewResolution View resolution.\n   * @param {number} viewRotation View rotation.\n   * @param {import(\"../../extent.js\").Extent} imageExtent Image extent.\n   * @private\n   */\n  WebGLImageLayerRenderer.prototype.updateProjectionMatrix_ = function updateProjectionMatrix_ (\n    canvasWidth,\n    canvasHeight,\n    pixelRatio,\n    viewCenter,\n    viewResolution,\n    viewRotation,\n    imageExtent\n  ) {\n\n    var canvasExtentWidth = canvasWidth * viewResolution;\n    var canvasExtentHeight = canvasHeight * viewResolution;\n\n    var projectionMatrix = this.projectionMatrix;\n    resetTransform(projectionMatrix);\n    scaleTransform(projectionMatrix,\n      pixelRatio * 2 / canvasExtentWidth,\n      pixelRatio * 2 / canvasExtentHeight);\n    rotateTransform(projectionMatrix, -viewRotation);\n    translateTransform(projectionMatrix,\n      imageExtent[0] - viewCenter[0],\n      imageExtent[1] - viewCenter[1]);\n    scaleTransform(projectionMatrix,\n      (imageExtent[2] - imageExtent[0]) / 2,\n      (imageExtent[3] - imageExtent[1]) / 2);\n    translateTransform(projectionMatrix, 1, 1);\n\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLImageLayerRenderer.prototype.forEachLayerAtPixel = function forEachLayerAtPixel (pixel, frameState, callback, thisArg) {\n    if (!this.image_ || !this.image_.getImage()) {\n      return undefined;\n    }\n\n    var imageSize =\n        [this.image_.getImage().width, this.image_.getImage().height];\n\n    if (!this.hitTransformationMatrix_) {\n      this.hitTransformationMatrix_ = this.getHitTransformationMatrix_(\n        frameState.size, imageSize);\n    }\n\n    var pixelOnFrameBuffer = applyTransform(\n      this.hitTransformationMatrix_, pixel.slice());\n\n    if (pixelOnFrameBuffer[0] < 0 || pixelOnFrameBuffer[0] > imageSize[0] ||\n        pixelOnFrameBuffer[1] < 0 || pixelOnFrameBuffer[1] > imageSize[1]) {\n      // outside the image, no need to check\n      return undefined;\n    }\n\n    if (!this.hitCanvasContext_) {\n      this.hitCanvasContext_ = createCanvasContext2D(1, 1);\n    }\n\n    this.hitCanvasContext_.clearRect(0, 0, 1, 1);\n    this.hitCanvasContext_.drawImage(this.image_.getImage(),\n      pixelOnFrameBuffer[0], pixelOnFrameBuffer[1], 1, 1, 0, 0, 1, 1);\n\n    var imageData = this.hitCanvasContext_.getImageData(0, 0, 1, 1).data;\n    if (imageData[3] > 0) {\n      return callback.call(thisArg, this.getLayer(), imageData);\n    } else {\n      return undefined;\n    }\n  };\n\n  /**\n   * The transformation matrix to get the pixel on the image for a\n   * pixel on the map.\n   * @param {import(\"../../size.js\").Size} mapSize The map size.\n   * @param {import(\"../../size.js\").Size} imageSize The image size.\n   * @return {import(\"../../transform.js\").Transform} The transformation matrix.\n   * @private\n   */\n  WebGLImageLayerRenderer.prototype.getHitTransformationMatrix_ = function getHitTransformationMatrix_ (mapSize, imageSize) {\n    // the first matrix takes a map pixel, flips the y-axis and scales to\n    // a range between -1 ... 1\n    var mapCoordTransform = createTransform();\n    translateTransform(mapCoordTransform, -1, -1);\n    scaleTransform(mapCoordTransform, 2 / mapSize[0], 2 / mapSize[1]);\n    translateTransform(mapCoordTransform, 0, mapSize[1]);\n    scaleTransform(mapCoordTransform, 1, -1);\n\n    // the second matrix is the inverse of the projection matrix used in the\n    // shader for drawing\n    var projectionMatrixInv = invertTransform(this.projectionMatrix.slice());\n\n    // the third matrix scales to the image dimensions and flips the y-axis again\n    var transform = createTransform();\n    translateTransform(transform, 0, imageSize[1]);\n    scaleTransform(transform, 1, -1);\n    scaleTransform(transform, imageSize[0] / 2, imageSize[1] / 2);\n    translateTransform(transform, 1, 1);\n\n    multiplyTransform(transform, projectionMatrixInv);\n    multiplyTransform(transform, mapCoordTransform);\n\n    return transform;\n  };\n\n  return WebGLImageLayerRenderer;\n}(WebGLLayerRenderer));\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {import(\"../../layer/Layer.js\").default} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nWebGLImageLayerRenderer['handles'] = function(layer) {\n  return layer.getType() === LayerType.IMAGE;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {import(\"../Map.js\").default} mapRenderer The map renderer.\n * @param {import(\"../../layer/Layer.js\").default} layer The layer to be rendererd.\n * @return {WebGLImageLayerRenderer} The layer renderer.\n */\nWebGLImageLayerRenderer['create'] = function(mapRenderer, layer) {\n  return new WebGLImageLayerRenderer(\n    /** @type {import(\"./Map.js\").default} */ (mapRenderer),\n    /** @type {import(\"../../layer/Image.js\").default} */ (layer)\n  );\n};\n\n\nexport default WebGLImageLayerRenderer;\n\n//# sourceMappingURL=ImageLayer.js.map","/**\n * @module ol/renderer/webgl/Map\n */\n\nimport {stableSort} from '../../array.js';\nimport {CLASS_UNSELECTABLE} from '../../css.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {listen} from '../../events.js';\nimport {visibleAtResolution} from '../../layer/Layer.js';\nimport RenderEvent from '../../render/Event.js';\nimport RenderEventType from '../../render/EventType.js';\nimport WebGLImmediateRenderer from '../../render/webgl/Immediate.js';\nimport MapRenderer, {sortByZIndex} from '../Map.js';\nimport SourceState from '../../source/State.js';\nimport LRUCache from '../../structs/LRUCache.js';\nimport PriorityQueue from '../../structs/PriorityQueue.js';\nimport {BLEND, CLAMP_TO_EDGE, COLOR_BUFFER_BIT, CULL_FACE, DEPTH_TEST, FRAMEBUFFER,\n  getContext, LINEAR, ONE, ONE_MINUS_SRC_ALPHA, RGBA, SCISSOR_TEST, SRC_ALPHA,\n  STENCIL_TEST, TEXTURE0, TEXTURE_2D, TEXTURE_MAG_FILTER, TEXTURE_MIN_FILTER,\n  TEXTURE_WRAP_S, TEXTURE_WRAP_T, UNSIGNED_BYTE} from '../../webgl.js';\nimport WebGLContext from '../../webgl/Context.js';\nimport ContextEventType from '../../webgl/ContextEventType.js';\n\n\n/**\n * @typedef {Object} TextureCacheEntry\n * @property {number} magFilter\n * @property {number} minFilter\n * @property {WebGLTexture} texture\n */\n\n\n/**\n * Texture cache high water mark.\n * @type {number}\n */\nvar WEBGL_TEXTURE_CACHE_HIGH_WATER_MARK = 1024;\n\n\n/**\n * @classdesc\n * WebGL map renderer.\n * @api\n */\nvar WebGLMapRenderer = /*@__PURE__*/(function (MapRenderer) {\n  function WebGLMapRenderer(map) {\n    MapRenderer.call(this, map);\n\n    var container = map.getViewport();\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.canvas_ = /** @type {HTMLCanvasElement} */\n      (document.createElement('canvas'));\n    this.canvas_.style.width = '100%';\n    this.canvas_.style.height = '100%';\n    this.canvas_.style.display = 'block';\n    this.canvas_.className = CLASS_UNSELECTABLE;\n    container.insertBefore(this.canvas_, container.childNodes[0] || null);\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.clipTileCanvasWidth_ = 0;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.clipTileCanvasHeight_ = 0;\n\n    /**\n     * @private\n     * @type {CanvasRenderingContext2D}\n     */\n    this.clipTileContext_ = createCanvasContext2D();\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.renderedVisible_ = true;\n\n    /**\n     * @private\n     * @type {WebGLRenderingContext}\n     */\n    this.gl_ = getContext(this.canvas_, {\n      antialias: true,\n      depth: true,\n      failIfMajorPerformanceCaveat: true,\n      preserveDrawingBuffer: false,\n      stencil: true\n    });\n\n    /**\n     * @private\n     * @type {import(\"../../webgl/Context.js\").default}\n     */\n    this.context_ = new WebGLContext(this.canvas_, this.gl_);\n\n    listen(this.canvas_, ContextEventType.LOST,\n      this.handleWebGLContextLost, this);\n    listen(this.canvas_, ContextEventType.RESTORED,\n      this.handleWebGLContextRestored, this);\n\n    /**\n     * @private\n     * @type {import(\"../../structs/LRUCache.js\").default<TextureCacheEntry|null>}\n     */\n    this.textureCache_ = new LRUCache();\n\n    /**\n     * @private\n     * @type {import(\"../../coordinate.js\").Coordinate}\n     */\n    this.focus_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../structs/PriorityQueue.js\").default<Array>}\n     */\n    this.tileTextureQueue_ = new PriorityQueue(\n      /**\n       * @param {Array<*>} element Element.\n       * @return {number} Priority.\n       * @this {WebGLMapRenderer}\n       */\n      (function(element) {\n        var tileCenter = /** @type {import(\"../../coordinate.js\").Coordinate} */ (element[1]);\n        var tileResolution = /** @type {number} */ (element[2]);\n        var deltaX = tileCenter[0] - this.focus_[0];\n        var deltaY = tileCenter[1] - this.focus_[1];\n        return 65536 * Math.log(tileResolution) +\n              Math.sqrt(deltaX * deltaX + deltaY * deltaY) / tileResolution;\n      }).bind(this),\n      /**\n       * @param {Array<*>} element Element.\n       * @return {string} Key.\n       */\n      function(element) {\n        return (\n          /** @type {import(\"../../Tile.js\").default} */ (element[0]).getKey()\n        );\n      });\n\n\n    /**\n     * @param {import(\"../../PluggableMap.js\").default} map Map.\n     * @param {?import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n     * @return {boolean} false.\n     * @this {WebGLMapRenderer}\n     */\n    this.loadNextTileTexture_ =\n        function(map, frameState) {\n          if (!this.tileTextureQueue_.isEmpty()) {\n            this.tileTextureQueue_.reprioritize();\n            var element = this.tileTextureQueue_.dequeue();\n            var tile = /** @type {import(\"../../Tile.js\").default} */ (element[0]);\n            var tileSize = /** @type {import(\"../../size.js\").Size} */ (element[3]);\n            var tileGutter = /** @type {number} */ (element[4]);\n            this.bindTileTexture(\n              tile, tileSize, tileGutter, LINEAR, LINEAR);\n          }\n          return false;\n        }.bind(this);\n\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.textureCacheFrameMarkerCount_ = 0;\n\n    this.initializeGL_();\n  }\n\n  if ( MapRenderer ) WebGLMapRenderer.__proto__ = MapRenderer;\n  WebGLMapRenderer.prototype = Object.create( MapRenderer && MapRenderer.prototype );\n  WebGLMapRenderer.prototype.constructor = WebGLMapRenderer;\n\n  /**\n   * @param {import(\"../../Tile.js\").default} tile Tile.\n   * @param {import(\"../../size.js\").Size} tileSize Tile size.\n   * @param {number} tileGutter Tile gutter.\n   * @param {number} magFilter Mag filter.\n   * @param {number} minFilter Min filter.\n   */\n  WebGLMapRenderer.prototype.bindTileTexture = function bindTileTexture (tile, tileSize, tileGutter, magFilter, minFilter) {\n    var gl = this.getGL();\n    var tileKey = tile.getKey();\n    if (this.textureCache_.containsKey(tileKey)) {\n      var textureCacheEntry = this.textureCache_.get(tileKey);\n      gl.bindTexture(TEXTURE_2D, textureCacheEntry.texture);\n      if (textureCacheEntry.magFilter != magFilter) {\n        gl.texParameteri(\n          TEXTURE_2D, TEXTURE_MAG_FILTER, magFilter);\n        textureCacheEntry.magFilter = magFilter;\n      }\n      if (textureCacheEntry.minFilter != minFilter) {\n        gl.texParameteri(\n          TEXTURE_2D, TEXTURE_MIN_FILTER, minFilter);\n        textureCacheEntry.minFilter = minFilter;\n      }\n    } else {\n      var texture = gl.createTexture();\n      var imageTile = /** @type {import(\"../../ImageTile.js\").default} */ (tile);\n      gl.bindTexture(TEXTURE_2D, texture);\n      if (tileGutter > 0) {\n        var clipTileCanvas = this.clipTileContext_.canvas;\n        var clipTileContext = this.clipTileContext_;\n        if (this.clipTileCanvasWidth_ !== tileSize[0] ||\n            this.clipTileCanvasHeight_ !== tileSize[1]) {\n          clipTileCanvas.width = tileSize[0];\n          clipTileCanvas.height = tileSize[1];\n          this.clipTileCanvasWidth_ = tileSize[0];\n          this.clipTileCanvasHeight_ = tileSize[1];\n        } else {\n          clipTileContext.clearRect(0, 0, tileSize[0], tileSize[1]);\n        }\n        clipTileContext.drawImage(imageTile.getImage(), tileGutter, tileGutter,\n          tileSize[0], tileSize[1], 0, 0, tileSize[0], tileSize[1]);\n        gl.texImage2D(TEXTURE_2D, 0,\n          RGBA, RGBA,\n          UNSIGNED_BYTE, clipTileCanvas);\n      } else {\n        gl.texImage2D(TEXTURE_2D, 0,\n          RGBA, RGBA,\n          UNSIGNED_BYTE, imageTile.getImage());\n      }\n      gl.texParameteri(\n        TEXTURE_2D, TEXTURE_MAG_FILTER, magFilter);\n      gl.texParameteri(\n        TEXTURE_2D, TEXTURE_MIN_FILTER, minFilter);\n      gl.texParameteri(TEXTURE_2D, TEXTURE_WRAP_S,\n        CLAMP_TO_EDGE);\n      gl.texParameteri(TEXTURE_2D, TEXTURE_WRAP_T,\n        CLAMP_TO_EDGE);\n      this.textureCache_.set(tileKey, {\n        texture: texture,\n        magFilter: magFilter,\n        minFilter: minFilter\n      });\n    }\n  };\n\n  /**\n   * @param {import(\"../../render/EventType.js\").default} type Event type.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   */\n  WebGLMapRenderer.prototype.dispatchRenderEvent = function dispatchRenderEvent (type, frameState) {\n    var map = this.getMap();\n    if (map.hasListener(type)) {\n      var context = this.context_;\n\n      var extent = frameState.extent;\n      var size = frameState.size;\n      var viewState = frameState.viewState;\n      var pixelRatio = frameState.pixelRatio;\n\n      var resolution = viewState.resolution;\n      var center = viewState.center;\n      var rotation = viewState.rotation;\n\n      var vectorContext = new WebGLImmediateRenderer(context,\n        center, resolution, rotation, size, extent, pixelRatio);\n      var composeEvent = new RenderEvent(type, vectorContext,\n        frameState, null, context);\n      map.dispatchEvent(composeEvent);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLMapRenderer.prototype.disposeInternal = function disposeInternal () {\n    var gl = this.getGL();\n    if (!gl.isContextLost()) {\n      this.textureCache_.forEach(\n        /**\n         * @param {?TextureCacheEntry} textureCacheEntry\n         *     Texture cache entry.\n         */\n        function(textureCacheEntry) {\n          if (textureCacheEntry) {\n            gl.deleteTexture(textureCacheEntry.texture);\n          }\n        });\n    }\n    this.context_.dispose();\n    MapRenderer.prototype.disposeInternal.call(this);\n  };\n\n  /**\n   * @param {import(\"../../PluggableMap.js\").default} map Map.\n   * @param {import(\"../../PluggableMap.js\").FrameState} frameState Frame state.\n   * @private\n   */\n  WebGLMapRenderer.prototype.expireCache_ = function expireCache_ (map, frameState) {\n    var gl = this.getGL();\n    var textureCacheEntry;\n    while (this.textureCache_.getCount() - this.textureCacheFrameMarkerCount_ >\n        WEBGL_TEXTURE_CACHE_HIGH_WATER_MARK) {\n      textureCacheEntry = this.textureCache_.peekLast();\n      if (!textureCacheEntry) {\n        if (+this.textureCache_.peekLastKey() == frameState.index) {\n          break;\n        } else {\n          --this.textureCacheFrameMarkerCount_;\n        }\n      } else {\n        gl.deleteTexture(textureCacheEntry.texture);\n      }\n      this.textureCache_.pop();\n    }\n  };\n\n  /**\n   * @return {import(\"../../webgl/Context.js\").default} The context.\n   */\n  WebGLMapRenderer.prototype.getContext = function getContext () {\n    return this.context_;\n  };\n\n  /**\n   * @return {WebGLRenderingContext} GL.\n   */\n  WebGLMapRenderer.prototype.getGL = function getGL () {\n    return this.gl_;\n  };\n\n  /**\n   * @return {import(\"../../structs/PriorityQueue.js\").default<Array>} Tile texture queue.\n   */\n  WebGLMapRenderer.prototype.getTileTextureQueue = function getTileTextureQueue () {\n    return this.tileTextureQueue_;\n  };\n\n  /**\n   * @param {import(\"../../events/Event.js\").default} event Event.\n   * @protected\n   */\n  WebGLMapRenderer.prototype.handleWebGLContextLost = function handleWebGLContextLost (event) {\n    event.preventDefault();\n    this.textureCache_.clear();\n    this.textureCacheFrameMarkerCount_ = 0;\n\n    var renderers = this.getLayerRenderers();\n    for (var id in renderers) {\n      var renderer = /** @type {import(\"./Layer.js\").default} */ (renderers[id]);\n      renderer.handleWebGLContextLost();\n    }\n  };\n\n  /**\n   * @protected\n   */\n  WebGLMapRenderer.prototype.handleWebGLContextRestored = function handleWebGLContextRestored () {\n    this.initializeGL_();\n    this.getMap().render();\n  };\n\n  /**\n   * @private\n   */\n  WebGLMapRenderer.prototype.initializeGL_ = function initializeGL_ () {\n    var gl = this.gl_;\n    gl.activeTexture(TEXTURE0);\n    gl.blendFuncSeparate(\n      SRC_ALPHA, ONE_MINUS_SRC_ALPHA,\n      ONE, ONE_MINUS_SRC_ALPHA);\n    gl.disable(CULL_FACE);\n    gl.disable(DEPTH_TEST);\n    gl.disable(SCISSOR_TEST);\n    gl.disable(STENCIL_TEST);\n  };\n\n  /**\n   * @param {import(\"../../Tile.js\").default} tile Tile.\n   * @return {boolean} Is tile texture loaded.\n   */\n  WebGLMapRenderer.prototype.isTileTextureLoaded = function isTileTextureLoaded (tile) {\n    return this.textureCache_.containsKey(tile.getKey());\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLMapRenderer.prototype.renderFrame = function renderFrame (frameState) {\n\n    var context = this.getContext();\n    var gl = this.getGL();\n\n    if (gl.isContextLost()) {\n      return false;\n    }\n\n    if (!frameState) {\n      if (this.renderedVisible_) {\n        this.canvas_.style.display = 'none';\n        this.renderedVisible_ = false;\n      }\n      return false;\n    }\n\n    this.focus_ = frameState.focus;\n\n    this.textureCache_.set((-frameState.index).toString(), null);\n    ++this.textureCacheFrameMarkerCount_;\n\n    this.dispatchRenderEvent(RenderEventType.PRECOMPOSE, frameState);\n\n    /** @type {Array<import(\"../../layer/Layer.js\").State>} */\n    var layerStatesToDraw = [];\n    var layerStatesArray = frameState.layerStatesArray;\n    stableSort(layerStatesArray, sortByZIndex);\n\n    var viewResolution = frameState.viewState.resolution;\n    var i, ii;\n    for (i = 0, ii = layerStatesArray.length; i < ii; ++i) {\n      var layerState = layerStatesArray[i];\n      if (visibleAtResolution(layerState, viewResolution) &&\n          layerState.sourceState == SourceState.READY) {\n        var layerRenderer = /** @type {import(\"./Layer.js\").default} */ (this.getLayerRenderer(layerState.layer));\n        if (layerRenderer.prepareFrame(frameState, layerState, context)) {\n          layerStatesToDraw.push(layerState);\n        }\n      }\n    }\n\n    var width = frameState.size[0] * frameState.pixelRatio;\n    var height = frameState.size[1] * frameState.pixelRatio;\n    if (this.canvas_.width != width || this.canvas_.height != height) {\n      this.canvas_.width = width;\n      this.canvas_.height = height;\n    }\n\n    gl.bindFramebuffer(FRAMEBUFFER, null);\n\n    gl.clearColor(0, 0, 0, 0);\n    gl.clear(COLOR_BUFFER_BIT);\n    gl.enable(BLEND);\n    gl.viewport(0, 0, this.canvas_.width, this.canvas_.height);\n\n    for (i = 0, ii = layerStatesToDraw.length; i < ii; ++i) {\n      var layerState$1 = layerStatesToDraw[i];\n      var layerRenderer$1 = /** @type {import(\"./Layer.js\").default} */ (this.getLayerRenderer(layerState$1.layer));\n      layerRenderer$1.composeFrame(frameState, layerState$1, context);\n    }\n\n    if (!this.renderedVisible_) {\n      this.canvas_.style.display = '';\n      this.renderedVisible_ = true;\n    }\n\n    this.calculateMatrices2D(frameState);\n\n    if (this.textureCache_.getCount() - this.textureCacheFrameMarkerCount_ >\n        WEBGL_TEXTURE_CACHE_HIGH_WATER_MARK) {\n      frameState.postRenderFunctions.push(\n        /** @type {import(\"../../PluggableMap.js\").PostRenderFunction} */ (this.expireCache_.bind(this))\n      );\n    }\n\n    if (!this.tileTextureQueue_.isEmpty()) {\n      frameState.postRenderFunctions.push(this.loadNextTileTexture_);\n      frameState.animate = true;\n    }\n\n    this.dispatchRenderEvent(RenderEventType.POSTCOMPOSE, frameState);\n\n    this.scheduleRemoveUnusedLayerRenderers(frameState);\n    this.scheduleExpireIconCache(frameState);\n\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLMapRenderer.prototype.forEachFeatureAtCoordinate = function forEachFeatureAtCoordinate (\n    coordinate,\n    frameState,\n    hitTolerance,\n    callback,\n    thisArg,\n    layerFilter,\n    thisArg2\n  ) {\n    var result;\n\n    if (this.getGL().isContextLost()) {\n      return false;\n    }\n\n    var viewState = frameState.viewState;\n\n    var layerStates = frameState.layerStatesArray;\n    var numLayers = layerStates.length;\n    var i;\n    for (i = numLayers - 1; i >= 0; --i) {\n      var layerState = layerStates[i];\n      var layer = layerState.layer;\n      if (visibleAtResolution(layerState, viewState.resolution) &&\n          layerFilter.call(thisArg2, layer)) {\n        var layerRenderer = this.getLayerRenderer(layer);\n        result = layerRenderer.forEachFeatureAtCoordinate(\n          coordinate, frameState, hitTolerance, callback);\n        if (result) {\n          return result;\n        }\n      }\n    }\n    return undefined;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLMapRenderer.prototype.hasFeatureAtCoordinate = function hasFeatureAtCoordinate (coordinate, frameState, hitTolerance, layerFilter, thisArg) {\n    var hasFeature = false;\n\n    if (this.getGL().isContextLost()) {\n      return false;\n    }\n\n    var viewState = frameState.viewState;\n\n    var layerStates = frameState.layerStatesArray;\n    var numLayers = layerStates.length;\n    var i;\n    for (i = numLayers - 1; i >= 0; --i) {\n      var layerState = layerStates[i];\n      var layer = layerState.layer;\n      if (visibleAtResolution(layerState, viewState.resolution) &&\n          layerFilter.call(thisArg, layer)) {\n        var layerRenderer = this.getLayerRenderer(layer);\n        hasFeature =\n            layerRenderer.hasFeatureAtCoordinate(coordinate, frameState);\n        if (hasFeature) {\n          return true;\n        }\n      }\n    }\n    return hasFeature;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLMapRenderer.prototype.forEachLayerAtPixel = function forEachLayerAtPixel (pixel, frameState, hitTolerance, callback, thisArg, layerFilter, thisArg2) {\n    if (this.getGL().isContextLost()) {\n      return false;\n    }\n\n    var viewState = frameState.viewState;\n    var result;\n\n    var layerStates = frameState.layerStatesArray;\n    var numLayers = layerStates.length;\n    var i;\n    for (i = numLayers - 1; i >= 0; --i) {\n      var layerState = layerStates[i];\n      var layer = layerState.layer;\n      if (visibleAtResolution(layerState, viewState.resolution) &&\n          layerFilter.call(thisArg, layer)) {\n        var layerRenderer = /** @type {import(\"./Layer.js\").default} */ (this.getLayerRenderer(layer));\n        result = layerRenderer.forEachLayerAtPixel(\n          pixel, frameState, callback, thisArg);\n        if (result) {\n          return result;\n        }\n      }\n    }\n    return undefined;\n  };\n\n  return WebGLMapRenderer;\n}(MapRenderer));\n\n\nexport default WebGLMapRenderer;\n\n//# sourceMappingURL=Map.js.map","/**\n * @module ol/Tile\n */\nimport TileState from './TileState.js';\nimport {easeIn} from './easing.js';\nimport EventTarget from './events/Target.js';\nimport EventType from './events/EventType.js';\n\n\n/**\n * A function that takes an {@link module:ol/Tile} for the tile and a\n * `{string}` for the url as arguments. The default is\n * ```js\n * source.setTileLoadFunction(function(tile, src) {\n *   tile.getImage().src = src;\n * });\n * ```\n * For more fine grained control, the load function can use fetch or XMLHttpRequest and involve\n * error handling:\n *\n * ```js\n * import TileState from 'ol/TileState';\n *\n * source.setTileLoadFunction(function(tile, src) {\n *   var xhr = new XMLHttpRequest();\n *   xhr.responseType = 'blob';\n *   xhr.addEventListener('loadend', function (evt) {\n *     var data = this.response;\n *     if (data !== undefined) {\n *       tile.getImage().src = URL.createObjectURL(data);\n *     } else {\n *       tile.setState(TileState.ERROR);\n *     }\n *   });\n *   xhr.addEventListener('error', function () {\n *     tile.setState(TileState.ERROR);\n *   });\n *   xhr.open('GET', src);\n *   xhr.send();\n * });\n * ```\n *\n * @typedef {function(Tile, string)} LoadFunction\n * @api\n */\n\n/**\n * {@link module:ol/source/Tile~Tile} sources use a function of this type to get\n * the url that provides a tile for a given tile coordinate.\n *\n * This function takes an {@link module:ol/tilecoord~TileCoord} for the tile\n * coordinate, a `{number}` representing the pixel ratio and a\n * {@link module:ol/proj/Projection} for the projection  as arguments\n * and returns a `{string}` representing the tile URL, or undefined if no tile\n * should be requested for the passed tile coordinate.\n *\n * @typedef {function(import(\"./tilecoord.js\").TileCoord, number,\n *           import(\"./proj/Projection.js\").default): (string|undefined)} UrlFunction\n * @api\n */\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [transition=250] A duration for tile opacity\n * transitions in milliseconds. A duration of 0 disables the opacity transition.\n * @api\n */\n\n\n/**\n * @classdesc\n * Base class for tiles.\n *\n * @abstract\n */\nvar Tile = /*@__PURE__*/(function (EventTarget) {\n  function Tile(tileCoord, state, opt_options) {\n    EventTarget.call(this);\n\n    var options = opt_options ? opt_options : {};\n\n    /**\n     * @type {import(\"./tilecoord.js\").TileCoord}\n     */\n    this.tileCoord = tileCoord;\n\n    /**\n     * @protected\n     * @type {TileState}\n     */\n    this.state = state;\n\n    /**\n     * An \"interim\" tile for this tile. The interim tile may be used while this\n     * one is loading, for \"smooth\" transitions when changing params/dimensions\n     * on the source.\n     * @type {Tile}\n     */\n    this.interimTile = null;\n\n    /**\n     * A key assigned to the tile. This is used by the tile source to determine\n     * if this tile can effectively be used, or if a new tile should be created\n     * and this one be used as an interim tile for this new tile.\n     * @type {string}\n     */\n    this.key = '';\n\n    /**\n     * The duration for the opacity transition.\n     * @type {number}\n     */\n    this.transition_ = options.transition === undefined ? 250 : options.transition;\n\n    /**\n     * Lookup of start times for rendering transitions.  If the start time is\n     * equal to -1, the transition is complete.\n     * @type {Object<string, number>}\n     */\n    this.transitionStarts_ = {};\n\n  }\n\n  if ( EventTarget ) Tile.__proto__ = EventTarget;\n  Tile.prototype = Object.create( EventTarget && EventTarget.prototype );\n  Tile.prototype.constructor = Tile;\n\n  /**\n   * @protected\n   */\n  Tile.prototype.changed = function changed () {\n    this.dispatchEvent(EventType.CHANGE);\n  };\n\n  /**\n   * @return {string} Key.\n   */\n  Tile.prototype.getKey = function getKey () {\n    return this.key + '/' + this.tileCoord;\n  };\n\n  /**\n   * Get the interim tile most suitable for rendering using the chain of interim\n   * tiles. This corresponds to the  most recent tile that has been loaded, if no\n   * such tile exists, the original tile is returned.\n   * @return {!Tile} Best tile for rendering.\n   */\n  Tile.prototype.getInterimTile = function getInterimTile () {\n    if (!this.interimTile) {\n      //empty chain\n      return this;\n    }\n    var tile = this.interimTile;\n\n    // find the first loaded tile and return it. Since the chain is sorted in\n    // decreasing order of creation time, there is no need to search the remainder\n    // of the list (all those tiles correspond to older requests and will be\n    // cleaned up by refreshInterimChain)\n    do {\n      if (tile.getState() == TileState.LOADED) {\n        return tile;\n      }\n      tile = tile.interimTile;\n    } while (tile);\n\n    // we can not find a better tile\n    return this;\n  };\n\n  /**\n   * Goes through the chain of interim tiles and discards sections of the chain\n   * that are no longer relevant.\n   */\n  Tile.prototype.refreshInterimChain = function refreshInterimChain () {\n    if (!this.interimTile) {\n      return;\n    }\n\n    var tile = this.interimTile;\n    var prev = /** @type {Tile} */ (this);\n\n    do {\n      if (tile.getState() == TileState.LOADED) {\n        //we have a loaded tile, we can discard the rest of the list\n        //we would could abort any LOADING tile request\n        //older than this tile (i.e. any LOADING tile following this entry in the chain)\n        tile.interimTile = null;\n        break;\n      } else if (tile.getState() == TileState.LOADING) {\n        //keep this LOADING tile any loaded tiles later in the chain are\n        //older than this tile, so we're still interested in the request\n        prev = tile;\n      } else if (tile.getState() == TileState.IDLE) {\n        //the head of the list is the most current tile, we don't need\n        //to start any other requests for this chain\n        prev.interimTile = tile.interimTile;\n      } else {\n        prev = tile;\n      }\n      tile = prev.interimTile;\n    } while (tile);\n  };\n\n  /**\n   * Get the tile coordinate for this tile.\n   * @return {import(\"./tilecoord.js\").TileCoord} The tile coordinate.\n   * @api\n   */\n  Tile.prototype.getTileCoord = function getTileCoord () {\n    return this.tileCoord;\n  };\n\n  /**\n   * @return {TileState} State.\n   */\n  Tile.prototype.getState = function getState () {\n    return this.state;\n  };\n\n  /**\n   * Sets the state of this tile. If you write your own {@link module:ol/Tile~LoadFunction tileLoadFunction} ,\n   * it is important to set the state correctly to {@link module:ol/TileState~ERROR}\n   * when the tile cannot be loaded. Otherwise the tile cannot be removed from\n   * the tile queue and will block other requests.\n   * @param {TileState} state State.\n   * @api\n   */\n  Tile.prototype.setState = function setState (state) {\n    this.state = state;\n    this.changed();\n  };\n\n  /**\n   * Load the image or retry if loading previously failed.\n   * Loading is taken care of by the tile queue, and calling this method is\n   * only needed for preloading or for reloading in case of an error.\n   * @abstract\n   * @api\n   */\n  Tile.prototype.load = function load () {};\n\n  /**\n   * Get the alpha value for rendering.\n   * @param {string} id An id for the renderer.\n   * @param {number} time The render frame time.\n   * @return {number} A number between 0 and 1.\n   */\n  Tile.prototype.getAlpha = function getAlpha (id, time) {\n    if (!this.transition_) {\n      return 1;\n    }\n\n    var start = this.transitionStarts_[id];\n    if (!start) {\n      start = time;\n      this.transitionStarts_[id] = start;\n    } else if (start === -1) {\n      return 1;\n    }\n\n    var delta = time - start + (1000 / 60); // avoid rendering at 0\n    if (delta >= this.transition_) {\n      return 1;\n    }\n    return easeIn(delta / this.transition_);\n  };\n\n  /**\n   * Determine if a tile is in an alpha transition.  A tile is considered in\n   * transition if tile.getAlpha() has not yet been called or has been called\n   * and returned 1.\n   * @param {string} id An id for the renderer.\n   * @return {boolean} The tile is in transition.\n   */\n  Tile.prototype.inTransition = function inTransition (id) {\n    if (!this.transition_) {\n      return false;\n    }\n    return this.transitionStarts_[id] !== -1;\n  };\n\n  /**\n   * Mark a transition as complete.\n   * @param {string} id An id for the renderer.\n   */\n  Tile.prototype.endTransition = function endTransition (id) {\n    if (this.transition_) {\n      this.transitionStarts_[id] = -1;\n    }\n  };\n\n  return Tile;\n}(EventTarget));\n\n\nexport default Tile;\n\n//# sourceMappingURL=Tile.js.map","/**\n * @module ol/ImageTile\n */\nimport Tile from './Tile.js';\nimport TileState from './TileState.js';\nimport {createCanvasContext2D} from './dom.js';\nimport {listenOnce, unlistenByKey} from './events.js';\nimport EventType from './events/EventType.js';\n\n\nvar ImageTile = /*@__PURE__*/(function (Tile) {\n  function ImageTile(tileCoord, state, src, crossOrigin, tileLoadFunction, opt_options) {\n\n    Tile.call(this, tileCoord, state, opt_options);\n\n    /**\n     * @private\n     * @type {?string}\n     */\n    this.crossOrigin_ = crossOrigin;\n\n    /**\n     * Image URI\n     *\n     * @private\n     * @type {string}\n     */\n    this.src_ = src;\n\n    /**\n     * @private\n     * @type {HTMLImageElement|HTMLCanvasElement}\n     */\n    this.image_ = new Image();\n    if (crossOrigin !== null) {\n      this.image_.crossOrigin = crossOrigin;\n    }\n\n    /**\n     * @private\n     * @type {Array<import(\"./events.js\").EventsKey>}\n     */\n    this.imageListenerKeys_ = null;\n\n    /**\n     * @private\n     * @type {import(\"./Tile.js\").LoadFunction}\n     */\n    this.tileLoadFunction_ = tileLoadFunction;\n\n  }\n\n  if ( Tile ) ImageTile.__proto__ = Tile;\n  ImageTile.prototype = Object.create( Tile && Tile.prototype );\n  ImageTile.prototype.constructor = ImageTile;\n\n  /**\n   * @inheritDoc\n   */\n  ImageTile.prototype.disposeInternal = function disposeInternal () {\n    if (this.state == TileState.LOADING) {\n      this.unlistenImage_();\n      this.image_ = getBlankImage();\n    }\n    if (this.interimTile) {\n      this.interimTile.dispose();\n    }\n    this.state = TileState.ABORT;\n    this.changed();\n    Tile.prototype.disposeInternal.call(this);\n  };\n\n  /**\n   * Get the HTML image element for this tile (may be a Canvas, Image, or Video).\n   * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.\n   * @api\n   */\n  ImageTile.prototype.getImage = function getImage () {\n    return this.image_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  ImageTile.prototype.getKey = function getKey () {\n    return this.src_;\n  };\n\n  /**\n   * Tracks loading or read errors.\n   *\n   * @private\n   */\n  ImageTile.prototype.handleImageError_ = function handleImageError_ () {\n    this.state = TileState.ERROR;\n    this.unlistenImage_();\n    this.image_ = getBlankImage();\n    this.changed();\n  };\n\n  /**\n   * Tracks successful image load.\n   *\n   * @private\n   */\n  ImageTile.prototype.handleImageLoad_ = function handleImageLoad_ () {\n    var image = /** @type {HTMLImageElement} */ (this.image_);\n    if (image.naturalWidth && image.naturalHeight) {\n      this.state = TileState.LOADED;\n    } else {\n      this.state = TileState.EMPTY;\n    }\n    this.unlistenImage_();\n    this.changed();\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  ImageTile.prototype.load = function load () {\n    if (this.state == TileState.ERROR) {\n      this.state = TileState.IDLE;\n      this.image_ = new Image();\n      if (this.crossOrigin_ !== null) {\n        this.image_.crossOrigin = this.crossOrigin_;\n      }\n    }\n    if (this.state == TileState.IDLE) {\n      this.state = TileState.LOADING;\n      this.changed();\n      this.imageListenerKeys_ = [\n        listenOnce(this.image_, EventType.ERROR,\n          this.handleImageError_, this),\n        listenOnce(this.image_, EventType.LOAD,\n          this.handleImageLoad_, this)\n      ];\n      this.tileLoadFunction_(this, this.src_);\n    }\n  };\n\n  /**\n   * Discards event handlers which listen for load completion or errors.\n   *\n   * @private\n   */\n  ImageTile.prototype.unlistenImage_ = function unlistenImage_ () {\n    this.imageListenerKeys_.forEach(unlistenByKey);\n    this.imageListenerKeys_ = null;\n  };\n\n  return ImageTile;\n}(Tile));\n\n\n/**\n * Get a 1-pixel blank image.\n * @return {HTMLCanvasElement} Blank image.\n */\nfunction getBlankImage() {\n  var ctx = createCanvasContext2D(1, 1);\n  ctx.fillStyle = 'rgba(0,0,0,0)';\n  ctx.fillRect(0, 0, 1, 1);\n  return ctx.canvas;\n}\n\nexport default ImageTile;\n\n//# sourceMappingURL=ImageTile.js.map","/**\n * @module ol/tilecoord\n */\n\n\n/**\n * An array of three numbers representing the location of a tile in a tile\n * grid. The order is `z`, `x`, and `y`. `z` is the zoom level.\n * @typedef {Array<number>} TileCoord\n * @api\n */\n\n\n/**\n * @param {number} z Z.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {TileCoord=} opt_tileCoord Tile coordinate.\n * @return {TileCoord} Tile coordinate.\n */\nexport function createOrUpdate(z, x, y, opt_tileCoord) {\n  if (opt_tileCoord !== undefined) {\n    opt_tileCoord[0] = z;\n    opt_tileCoord[1] = x;\n    opt_tileCoord[2] = y;\n    return opt_tileCoord;\n  } else {\n    return [z, x, y];\n  }\n}\n\n\n/**\n * @param {number} z Z.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {string} Key.\n */\nexport function getKeyZXY(z, x, y) {\n  return z + '/' + x + '/' + y;\n}\n\n\n/**\n * Get the key for a tile coord.\n * @param {TileCoord} tileCoord The tile coord.\n * @return {string} Key.\n */\nexport function getKey(tileCoord) {\n  return getKeyZXY(tileCoord[0], tileCoord[1], tileCoord[2]);\n}\n\n\n/**\n * Get a tile coord given a key.\n * @param {string} key The tile coord key.\n * @return {TileCoord} The tile coord.\n */\nexport function fromKey(key) {\n  return key.split('/').map(Number);\n}\n\n\n/**\n * @param {TileCoord} tileCoord Tile coord.\n * @return {number} Hash.\n */\nexport function hash(tileCoord) {\n  return (tileCoord[1] << tileCoord[0]) + tileCoord[2];\n}\n\n\n/**\n * @param {TileCoord} tileCoord Tile coord.\n * @return {string} Quad key.\n */\nexport function quadKey(tileCoord) {\n  var z = tileCoord[0];\n  var digits = new Array(z);\n  var mask = 1 << (z - 1);\n  var i, charCode;\n  for (i = 0; i < z; ++i) {\n    // 48 is charCode for 0 - '0'.charCodeAt(0)\n    charCode = 48;\n    if (tileCoord[1] & mask) {\n      charCode += 1;\n    }\n    if (tileCoord[2] & mask) {\n      charCode += 2;\n    }\n    digits[i] = String.fromCharCode(charCode);\n    mask >>= 1;\n  }\n  return digits.join('');\n}\n\n\n/**\n * @param {TileCoord} tileCoord Tile coordinate.\n * @param {!import(\"./tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n * @return {boolean} Tile coordinate is within extent and zoom level range.\n */\nexport function withinExtentAndZ(tileCoord, tileGrid) {\n  var z = tileCoord[0];\n  var x = tileCoord[1];\n  var y = tileCoord[2];\n\n  if (tileGrid.getMinZoom() > z || z > tileGrid.getMaxZoom()) {\n    return false;\n  }\n  var extent = tileGrid.getExtent();\n  var tileRange;\n  if (!extent) {\n    tileRange = tileGrid.getFullTileRange(z);\n  } else {\n    tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z);\n  }\n  if (!tileRange) {\n    return true;\n  } else {\n    return tileRange.containsXY(x, y);\n  }\n}\n\n//# sourceMappingURL=tilecoord.js.map","/**\n * @module ol/TileCache\n */\nimport LRUCache from './structs/LRUCache.js';\nimport {fromKey, getKey} from './tilecoord.js';\n\nvar TileCache = /*@__PURE__*/(function (LRUCache) {\n  function TileCache(opt_highWaterMark) {\n\n    LRUCache.call(this, opt_highWaterMark);\n\n  }\n\n  if ( LRUCache ) TileCache.__proto__ = LRUCache;\n  TileCache.prototype = Object.create( LRUCache && LRUCache.prototype );\n  TileCache.prototype.constructor = TileCache;\n\n  /**\n   * @param {!Object<string, import(\"./TileRange.js\").default>} usedTiles Used tiles.\n   */\n  TileCache.prototype.expireCache = function expireCache (usedTiles) {\n    while (this.canExpireCache()) {\n      var tile = this.peekLast();\n      var zKey = tile.tileCoord[0].toString();\n      if (zKey in usedTiles && usedTiles[zKey].contains(tile.tileCoord)) {\n        break;\n      } else {\n        this.pop().dispose();\n      }\n    }\n  };\n\n  /**\n   * Prune all tiles from the cache that don't have the same z as the newest tile.\n   */\n  TileCache.prototype.pruneExceptNewestZ = function pruneExceptNewestZ () {\n    if (this.getCount() === 0) {\n      return;\n    }\n    var key = this.peekFirstKey();\n    var tileCoord = fromKey(key);\n    var z = tileCoord[0];\n    this.forEach(function(tile) {\n      if (tile.tileCoord[0] !== z) {\n        this.remove(getKey(tile.tileCoord));\n        tile.dispose();\n      }\n    }, this);\n  };\n\n  return TileCache;\n}(LRUCache));\n\n\nexport default TileCache;\n\n//# sourceMappingURL=TileCache.js.map","/**\n * @module ol/source/Source\n */\nimport {abstract} from '../util.js';\nimport BaseObject from '../Object.js';\nimport {get as getProjection} from '../proj.js';\nimport SourceState from './State.js';\n\n\n/**\n * A function that returns a string or an array of strings representing source\n * attributions.\n *\n * @typedef {function(import(\"../PluggableMap.js\").FrameState): (string|Array<string>)} Attribution\n */\n\n\n/**\n * A type that can be used to provide attribution information for data sources.\n *\n * It represents either\n * * a simple string (e.g. `'© Acme Inc.'`)\n * * an array of simple strings (e.g. `['© Acme Inc.', '© Bacme Inc.']`)\n * * a function that returns a string or array of strings (`{@link module:ol/source/Source~Attribution}`)\n *\n * @typedef {string|Array<string>|Attribution} AttributionLike\n */\n\n\n/**\n * @typedef {Object} Options\n * @property {AttributionLike} [attributions]\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {import(\"../proj.js\").ProjectionLike} projection\n * @property {SourceState} [state='ready']\n * @property {boolean} [wrapX=false]\n */\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for {@link module:ol/layer/Layer~Layer} sources.\n *\n * A generic `change` event is triggered when the state of the source changes.\n * @abstract\n * @api\n */\nvar Source = /*@__PURE__*/(function (BaseObject) {\n  function Source(options) {\n\n    BaseObject.call(this);\n\n    /**\n     * @private\n     * @type {import(\"../proj/Projection.js\").default}\n     */\n    this.projection_ = getProjection(options.projection);\n\n    /**\n     * @private\n     * @type {?Attribution}\n     */\n    this.attributions_ = adaptAttributions(options.attributions);\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.attributionsCollapsible_ = options.attributionsCollapsible !== undefined ?\n      options.attributionsCollapsible : true;\n\n    /**\n     * This source is currently loading data. Sources that defer loading to the\n     * map's tile queue never set this to `true`.\n     * @type {boolean}\n     */\n    this.loading = false;\n\n    /**\n     * @private\n     * @type {SourceState}\n     */\n    this.state_ = options.state !== undefined ?\n      options.state : SourceState.READY;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.wrapX_ = options.wrapX !== undefined ? options.wrapX : false;\n\n  }\n\n  if ( BaseObject ) Source.__proto__ = BaseObject;\n  Source.prototype = Object.create( BaseObject && BaseObject.prototype );\n  Source.prototype.constructor = Source;\n\n  /**\n   * Get the attribution function for the source.\n   * @return {?Attribution} Attribution function.\n   */\n  Source.prototype.getAttributions = function getAttributions () {\n    return this.attributions_;\n  };\n\n  /**\n   * @return {boolean} Aattributions are collapsible.\n   */\n  Source.prototype.getAttributionsCollapsible = function getAttributionsCollapsible () {\n    return this.attributionsCollapsible_;\n  };\n\n  /**\n   * Get the projection of the source.\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   * @api\n   */\n  Source.prototype.getProjection = function getProjection () {\n    return this.projection_;\n  };\n\n  /**\n   * @abstract\n   * @return {Array<number>|undefined} Resolutions.\n   */\n  Source.prototype.getResolutions = function getResolutions () {\n    return abstract();\n  };\n\n  /**\n   * Get the state of the source, see {@link module:ol/source/State~State} for possible states.\n   * @return {SourceState} State.\n   * @api\n   */\n  Source.prototype.getState = function getState () {\n    return this.state_;\n  };\n\n  /**\n   * @return {boolean|undefined} Wrap X.\n   */\n  Source.prototype.getWrapX = function getWrapX () {\n    return this.wrapX_;\n  };\n\n  /**\n   * Refreshes the source and finally dispatches a 'change' event.\n   * @api\n   */\n  Source.prototype.refresh = function refresh () {\n    this.changed();\n  };\n\n  /**\n   * Set the attributions of the source.\n   * @param {AttributionLike|undefined} attributions Attributions.\n   *     Can be passed as `string`, `Array<string>`, `{@link module:ol/source/Source~Attribution}`,\n   *     or `undefined`.\n   * @api\n   */\n  Source.prototype.setAttributions = function setAttributions (attributions) {\n    this.attributions_ = adaptAttributions(attributions);\n    this.changed();\n  };\n\n  /**\n   * Set the state of the source.\n   * @param {SourceState} state State.\n   * @protected\n   */\n  Source.prototype.setState = function setState (state) {\n    this.state_ = state;\n    this.changed();\n  };\n\n  return Source;\n}(BaseObject));\n\n\n/**\n * Turns the attributions option into an attributions function.\n * @param {AttributionLike|undefined} attributionLike The attribution option.\n * @return {?Attribution} An attribution function (or null).\n */\nfunction adaptAttributions(attributionLike) {\n  if (!attributionLike) {\n    return null;\n  }\n  if (Array.isArray(attributionLike)) {\n    return function(frameState) {\n      return attributionLike;\n    };\n  }\n\n  if (typeof attributionLike === 'function') {\n    return attributionLike;\n  }\n\n  return function(frameState) {\n    return [attributionLike];\n  };\n}\n\n\nexport default Source;\n\n//# sourceMappingURL=Source.js.map","/**\n * @module ol/tilegrid/TileGrid\n */\nimport {DEFAULT_TILE_SIZE} from './common.js';\nimport {assert} from '../asserts.js';\nimport TileRange, {createOrUpdate as createOrUpdateTileRange} from '../TileRange.js';\nimport {isSorted, linearFindNearest} from '../array.js';\nimport {createOrUpdate, getTopLeft} from '../extent.js';\nimport {clamp} from '../math.js';\nimport {toSize} from '../size.js';\nimport {createOrUpdate as createOrUpdateTileCoord} from '../tilecoord.js';\n\n\n/**\n * @private\n * @type {import(\"../tilecoord.js\").TileCoord}\n */\nvar tmpTileCoord = [0, 0, 0];\n\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../extent.js\").Extent} [extent] Extent for the tile grid. No tiles outside this\n * extent will be requested by {@link module:ol/source/Tile} sources. When no `origin` or\n * `origins` are configured, the `origin` will be set to the top-left corner of the extent.\n * @property {number} [minZoom=0] Minimum zoom.\n * @property {import(\"../coordinate.js\").Coordinate} [origin] The tile grid origin, i.e. where the `x`\n * and `y` axes meet (`[z, 0, 0]`). Tile coordinates increase left to right and upwards. If not\n * specified, `extent` or `origins` must be provided.\n * @property {Array<import(\"../coordinate.js\").Coordinate>} [origins] Tile grid origins, i.e. where\n * the `x` and `y` axes meet (`[z, 0, 0]`), for each zoom level. If given, the array length\n * should match the length of the `resolutions` array, i.e. each resolution can have a different\n * origin. Tile coordinates increase left to right and upwards. If not specified, `extent` or\n * `origin` must be provided.\n * @property {!Array<number>} resolutions Resolutions. The array index of each resolution needs\n * to match the zoom level. This means that even if a `minZoom` is configured, the resolutions\n * array will have a length of `maxZoom + 1`.\n * @property {Array<import(\"../size.js\").Size>} [sizes] Sizes.\n * @property {number|import(\"../size.js\").Size} [tileSize] Tile size.\n * Default is `[256, 256]`.\n * @property {Array<import(\"../size.js\").Size>} [tileSizes] Tile sizes. If given, the array length\n * should match the length of the `resolutions` array, i.e. each resolution can have a different\n * tile size.\n */\n\n\n/**\n * @classdesc\n * Base class for setting the grid pattern for sources accessing tiled-image\n * servers.\n * @api\n */\nvar TileGrid = function TileGrid(options) {\n\n  /**\n   * @protected\n   * @type {number}\n   */\n  this.minZoom = options.minZoom !== undefined ? options.minZoom : 0;\n\n  /**\n   * @private\n   * @type {!Array<number>}\n   */\n  this.resolutions_ = options.resolutions;\n  assert(isSorted(this.resolutions_, function(a, b) {\n    return b - a;\n  }, true), 17); // `resolutions` must be sorted in descending order\n\n\n  // check if we've got a consistent zoom factor and origin\n  var zoomFactor;\n  if (!options.origins) {\n    for (var i = 0, ii = this.resolutions_.length - 1; i < ii; ++i) {\n      if (!zoomFactor) {\n        zoomFactor = this.resolutions_[i] / this.resolutions_[i + 1];\n      } else {\n        if (this.resolutions_[i] / this.resolutions_[i + 1] !== zoomFactor) {\n          zoomFactor = undefined;\n          break;\n        }\n      }\n    }\n  }\n\n\n  /**\n   * @private\n   * @type {number|undefined}\n   */\n  this.zoomFactor_ = zoomFactor;\n\n\n  /**\n   * @protected\n   * @type {number}\n   */\n  this.maxZoom = this.resolutions_.length - 1;\n\n  /**\n   * @private\n   * @type {import(\"../coordinate.js\").Coordinate}\n   */\n  this.origin_ = options.origin !== undefined ? options.origin : null;\n\n  /**\n   * @private\n   * @type {Array<import(\"../coordinate.js\").Coordinate>}\n   */\n  this.origins_ = null;\n  if (options.origins !== undefined) {\n    this.origins_ = options.origins;\n    assert(this.origins_.length == this.resolutions_.length,\n      20); // Number of `origins` and `resolutions` must be equal\n  }\n\n  var extent = options.extent;\n\n  if (extent !== undefined &&\n      !this.origin_ && !this.origins_) {\n    this.origin_ = getTopLeft(extent);\n  }\n\n  assert(\n    (!this.origin_ && this.origins_) || (this.origin_ && !this.origins_),\n    18); // Either `origin` or `origins` must be configured, never both\n\n  /**\n   * @private\n   * @type {Array<number|import(\"../size.js\").Size>}\n   */\n  this.tileSizes_ = null;\n  if (options.tileSizes !== undefined) {\n    this.tileSizes_ = options.tileSizes;\n    assert(this.tileSizes_.length == this.resolutions_.length,\n      19); // Number of `tileSizes` and `resolutions` must be equal\n  }\n\n  /**\n   * @private\n   * @type {number|import(\"../size.js\").Size}\n   */\n  this.tileSize_ = options.tileSize !== undefined ?\n    options.tileSize :\n    !this.tileSizes_ ? DEFAULT_TILE_SIZE : null;\n  assert(\n    (!this.tileSize_ && this.tileSizes_) ||\n      (this.tileSize_ && !this.tileSizes_),\n    22); // Either `tileSize` or `tileSizes` must be configured, never both\n\n  /**\n   * @private\n   * @type {import(\"../extent.js\").Extent}\n   */\n  this.extent_ = extent !== undefined ? extent : null;\n\n\n  /**\n   * @private\n   * @type {Array<import(\"../TileRange.js\").default>}\n   */\n  this.fullTileRanges_ = null;\n\n  /**\n   * @private\n   * @type {import(\"../size.js\").Size}\n   */\n  this.tmpSize_ = [0, 0];\n\n  if (options.sizes !== undefined) {\n    this.fullTileRanges_ = options.sizes.map(function(size, z) {\n      var tileRange = new TileRange(\n        Math.min(0, size[0]), Math.max(size[0] - 1, -1),\n        Math.min(0, size[1]), Math.max(size[1] - 1, -1));\n      return tileRange;\n    }, this);\n  } else if (extent) {\n    this.calculateTileRanges_(extent);\n  }\n\n};\n\n/**\n * Call a function with each tile coordinate for a given extent and zoom level.\n *\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {number} zoom Integer zoom level.\n * @param {function(import(\"../tilecoord.js\").TileCoord)} callback Function called with each tile coordinate.\n * @api\n */\nTileGrid.prototype.forEachTileCoord = function forEachTileCoord (extent, zoom, callback) {\n  var tileRange = this.getTileRangeForExtentAndZ(extent, zoom);\n  for (var i = tileRange.minX, ii = tileRange.maxX; i <= ii; ++i) {\n    for (var j = tileRange.minY, jj = tileRange.maxY; j <= jj; ++j) {\n      callback([zoom, i, j]);\n    }\n  }\n};\n\n/**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {function(this: T, number, import(\"../TileRange.js\").default): boolean} callback Callback.\n * @param {T=} opt_this The object to use as `this` in `callback`.\n * @param {import(\"../TileRange.js\").default=} opt_tileRange Temporary import(\"../TileRange.js\").default object.\n * @param {import(\"../extent.js\").Extent=} opt_extent Temporary import(\"../extent.js\").Extent object.\n * @return {boolean} Callback succeeded.\n * @template T\n */\nTileGrid.prototype.forEachTileCoordParentTileRange = function forEachTileCoordParentTileRange (tileCoord, callback, opt_this, opt_tileRange, opt_extent) {\n  var tileRange, x, y;\n  var tileCoordExtent = null;\n  var z = tileCoord[0] - 1;\n  if (this.zoomFactor_ === 2) {\n    x = tileCoord[1];\n    y = tileCoord[2];\n  } else {\n    tileCoordExtent = this.getTileCoordExtent(tileCoord, opt_extent);\n  }\n  while (z >= this.minZoom) {\n    if (this.zoomFactor_ === 2) {\n      x = Math.floor(x / 2);\n      y = Math.floor(y / 2);\n      tileRange = createOrUpdateTileRange(x, x, y, y, opt_tileRange);\n    } else {\n      tileRange = this.getTileRangeForExtentAndZ(tileCoordExtent, z, opt_tileRange);\n    }\n    if (callback.call(opt_this, z, tileRange)) {\n      return true;\n    }\n    --z;\n  }\n  return false;\n};\n\n/**\n * Get the extent for this tile grid, if it was configured.\n * @return {import(\"../extent.js\").Extent} Extent.\n */\nTileGrid.prototype.getExtent = function getExtent () {\n  return this.extent_;\n};\n\n/**\n * Get the maximum zoom level for the grid.\n * @return {number} Max zoom.\n * @api\n */\nTileGrid.prototype.getMaxZoom = function getMaxZoom () {\n  return this.maxZoom;\n};\n\n/**\n * Get the minimum zoom level for the grid.\n * @return {number} Min zoom.\n * @api\n */\nTileGrid.prototype.getMinZoom = function getMinZoom () {\n  return this.minZoom;\n};\n\n/**\n * Get the origin for the grid at the given zoom level.\n * @param {number} z Integer zoom level.\n * @return {import(\"../coordinate.js\").Coordinate} Origin.\n * @api\n */\nTileGrid.prototype.getOrigin = function getOrigin (z) {\n  if (this.origin_) {\n    return this.origin_;\n  } else {\n    return this.origins_[z];\n  }\n};\n\n/**\n * Get the resolution for the given zoom level.\n * @param {number} z Integer zoom level.\n * @return {number} Resolution.\n * @api\n */\nTileGrid.prototype.getResolution = function getResolution (z) {\n  return this.resolutions_[z];\n};\n\n/**\n * Get the list of resolutions for the tile grid.\n * @return {Array<number>} Resolutions.\n * @api\n */\nTileGrid.prototype.getResolutions = function getResolutions () {\n  return this.resolutions_;\n};\n\n/**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"../TileRange.js\").default=} opt_tileRange Temporary import(\"../TileRange.js\").default object.\n * @param {import(\"../extent.js\").Extent=} opt_extent Temporary import(\"../extent.js\").Extent object.\n * @return {import(\"../TileRange.js\").default} Tile range.\n */\nTileGrid.prototype.getTileCoordChildTileRange = function getTileCoordChildTileRange (tileCoord, opt_tileRange, opt_extent) {\n  if (tileCoord[0] < this.maxZoom) {\n    if (this.zoomFactor_ === 2) {\n      var minX = tileCoord[1] * 2;\n      var minY = tileCoord[2] * 2;\n      return createOrUpdateTileRange(minX, minX + 1, minY, minY + 1, opt_tileRange);\n    }\n    var tileCoordExtent = this.getTileCoordExtent(tileCoord, opt_extent);\n    return this.getTileRangeForExtentAndZ(\n      tileCoordExtent, tileCoord[0] + 1, opt_tileRange);\n  }\n  return null;\n};\n\n/**\n * Get the extent for a tile range.\n * @param {number} z Integer zoom level.\n * @param {import(\"../TileRange.js\").default} tileRange Tile range.\n * @param {import(\"../extent.js\").Extent=} opt_extent Temporary import(\"../extent.js\").Extent object.\n * @return {import(\"../extent.js\").Extent} Extent.\n */\nTileGrid.prototype.getTileRangeExtent = function getTileRangeExtent (z, tileRange, opt_extent) {\n  var origin = this.getOrigin(z);\n  var resolution = this.getResolution(z);\n  var tileSize = toSize(this.getTileSize(z), this.tmpSize_);\n  var minX = origin[0] + tileRange.minX * tileSize[0] * resolution;\n  var maxX = origin[0] + (tileRange.maxX + 1) * tileSize[0] * resolution;\n  var minY = origin[1] + tileRange.minY * tileSize[1] * resolution;\n  var maxY = origin[1] + (tileRange.maxY + 1) * tileSize[1] * resolution;\n  return createOrUpdate(minX, minY, maxX, maxY, opt_extent);\n};\n\n/**\n * Get a tile range for the given extent and integer zoom level.\n * @param {import(\"../extent.js\").Extent} extent Extent.\n * @param {number} z Integer zoom level.\n * @param {import(\"../TileRange.js\").default=} opt_tileRange Temporary tile range object.\n * @return {import(\"../TileRange.js\").default} Tile range.\n */\nTileGrid.prototype.getTileRangeForExtentAndZ = function getTileRangeForExtentAndZ (extent, z, opt_tileRange) {\n  var tileCoord = tmpTileCoord;\n  this.getTileCoordForXYAndZ_(extent[0], extent[1], z, false, tileCoord);\n  var minX = tileCoord[1];\n  var minY = tileCoord[2];\n  this.getTileCoordForXYAndZ_(extent[2], extent[3], z, true, tileCoord);\n  return createOrUpdateTileRange(minX, tileCoord[1], minY, tileCoord[2], opt_tileRange);\n};\n\n/**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @return {import(\"../coordinate.js\").Coordinate} Tile center.\n */\nTileGrid.prototype.getTileCoordCenter = function getTileCoordCenter (tileCoord) {\n  var origin = this.getOrigin(tileCoord[0]);\n  var resolution = this.getResolution(tileCoord[0]);\n  var tileSize = toSize(this.getTileSize(tileCoord[0]), this.tmpSize_);\n  return [\n    origin[0] + (tileCoord[1] + 0.5) * tileSize[0] * resolution,\n    origin[1] + (tileCoord[2] + 0.5) * tileSize[1] * resolution\n  ];\n};\n\n/**\n * Get the extent of a tile coordinate.\n *\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"../extent.js\").Extent=} opt_extent Temporary extent object.\n * @return {import(\"../extent.js\").Extent} Extent.\n * @api\n */\nTileGrid.prototype.getTileCoordExtent = function getTileCoordExtent (tileCoord, opt_extent) {\n  var origin = this.getOrigin(tileCoord[0]);\n  var resolution = this.getResolution(tileCoord[0]);\n  var tileSize = toSize(this.getTileSize(tileCoord[0]), this.tmpSize_);\n  var minX = origin[0] + tileCoord[1] * tileSize[0] * resolution;\n  var minY = origin[1] + tileCoord[2] * tileSize[1] * resolution;\n  var maxX = minX + tileSize[0] * resolution;\n  var maxY = minY + tileSize[1] * resolution;\n  return createOrUpdate(minX, minY, maxX, maxY, opt_extent);\n};\n\n/**\n * Get the tile coordinate for the given map coordinate and resolution.This\n * method considers that coordinates that intersect tile boundaries should be\n * assigned the higher tile coordinate.\n *\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {number} resolution Resolution.\n * @param {import(\"../tilecoord.js\").TileCoord=} opt_tileCoord Destination import(\"../tilecoord.js\").TileCoord object.\n * @return {import(\"../tilecoord.js\").TileCoord} Tile coordinate.\n * @api\n */\nTileGrid.prototype.getTileCoordForCoordAndResolution = function getTileCoordForCoordAndResolution (coordinate, resolution, opt_tileCoord) {\n  return this.getTileCoordForXYAndResolution_(\n    coordinate[0], coordinate[1], resolution, false, opt_tileCoord);\n};\n\n/**\n * Note that this method should not be called for resolutions that correspond\n * to an integer zoom level.Instead call the `getTileCoordForXYAndZ_` method.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {number} resolution Resolution (for a non-integer zoom level).\n * @param {boolean} reverseIntersectionPolicy Instead of letting edge\n *   intersections go to the higher tile coordinate, let edge intersections\n *   go to the lower tile coordinate.\n * @param {import(\"../tilecoord.js\").TileCoord=} opt_tileCoord Temporary import(\"../tilecoord.js\").TileCoord object.\n * @return {import(\"../tilecoord.js\").TileCoord} Tile coordinate.\n * @private\n */\nTileGrid.prototype.getTileCoordForXYAndResolution_ = function getTileCoordForXYAndResolution_ (x, y, resolution, reverseIntersectionPolicy, opt_tileCoord) {\n  var z = this.getZForResolution(resolution);\n  var scale = resolution / this.getResolution(z);\n  var origin = this.getOrigin(z);\n  var tileSize = toSize(this.getTileSize(z), this.tmpSize_);\n\n  var adjustX = reverseIntersectionPolicy ? 0.5 : 0;\n  var adjustY = reverseIntersectionPolicy ? 0 : 0.5;\n  var xFromOrigin = Math.floor((x - origin[0]) / resolution + adjustX);\n  var yFromOrigin = Math.floor((y - origin[1]) / resolution + adjustY);\n  var tileCoordX = scale * xFromOrigin / tileSize[0];\n  var tileCoordY = scale * yFromOrigin / tileSize[1];\n\n  if (reverseIntersectionPolicy) {\n    tileCoordX = Math.ceil(tileCoordX) - 1;\n    tileCoordY = Math.ceil(tileCoordY) - 1;\n  } else {\n    tileCoordX = Math.floor(tileCoordX);\n    tileCoordY = Math.floor(tileCoordY);\n  }\n\n  return createOrUpdateTileCoord(z, tileCoordX, tileCoordY, opt_tileCoord);\n};\n\n/**\n * Although there is repetition between this method and `getTileCoordForXYAndResolution_`,\n * they should have separate implementations.This method is for integer zoom\n * levels.The other method should only be called for resolutions corresponding\n * to non-integer zoom levels.\n * @param {number} x Map x coordinate.\n * @param {number} y Map y coordinate.\n * @param {number} z Integer zoom level.\n * @param {boolean} reverseIntersectionPolicy Instead of letting edge\n *   intersections go to the higher tile coordinate, let edge intersections\n *   go to the lower tile coordinate.\n * @param {import(\"../tilecoord.js\").TileCoord=} opt_tileCoord Temporary import(\"../tilecoord.js\").TileCoord object.\n * @return {import(\"../tilecoord.js\").TileCoord} Tile coordinate.\n * @private\n */\nTileGrid.prototype.getTileCoordForXYAndZ_ = function getTileCoordForXYAndZ_ (x, y, z, reverseIntersectionPolicy, opt_tileCoord) {\n  var origin = this.getOrigin(z);\n  var resolution = this.getResolution(z);\n  var tileSize = toSize(this.getTileSize(z), this.tmpSize_);\n\n  var adjustX = reverseIntersectionPolicy ? 0.5 : 0;\n  var adjustY = reverseIntersectionPolicy ? 0 : 0.5;\n  var xFromOrigin = Math.floor((x - origin[0]) / resolution + adjustX);\n  var yFromOrigin = Math.floor((y - origin[1]) / resolution + adjustY);\n  var tileCoordX = xFromOrigin / tileSize[0];\n  var tileCoordY = yFromOrigin / tileSize[1];\n\n  if (reverseIntersectionPolicy) {\n    tileCoordX = Math.ceil(tileCoordX) - 1;\n    tileCoordY = Math.ceil(tileCoordY) - 1;\n  } else {\n    tileCoordX = Math.floor(tileCoordX);\n    tileCoordY = Math.floor(tileCoordY);\n  }\n\n  return createOrUpdateTileCoord(z, tileCoordX, tileCoordY, opt_tileCoord);\n};\n\n/**\n * Get a tile coordinate given a map coordinate and zoom level.\n * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n * @param {number} z Zoom level.\n * @param {import(\"../tilecoord.js\").TileCoord=} opt_tileCoord Destination import(\"../tilecoord.js\").TileCoord object.\n * @return {import(\"../tilecoord.js\").TileCoord} Tile coordinate.\n * @api\n */\nTileGrid.prototype.getTileCoordForCoordAndZ = function getTileCoordForCoordAndZ (coordinate, z, opt_tileCoord) {\n  return this.getTileCoordForXYAndZ_(\n    coordinate[0], coordinate[1], z, false, opt_tileCoord);\n};\n\n/**\n * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @return {number} Tile resolution.\n */\nTileGrid.prototype.getTileCoordResolution = function getTileCoordResolution (tileCoord) {\n  return this.resolutions_[tileCoord[0]];\n};\n\n/**\n * Get the tile size for a zoom level. The type of the return value matches the\n * `tileSize` or `tileSizes` that the tile grid was configured with. To always\n * get an `import(\"../size.js\").Size`, run the result through `import(\"../size.js\").Size.toSize()`.\n * @param {number} z Z.\n * @return {number|import(\"../size.js\").Size} Tile size.\n * @api\n */\nTileGrid.prototype.getTileSize = function getTileSize (z) {\n  if (this.tileSize_) {\n    return this.tileSize_;\n  } else {\n    return this.tileSizes_[z];\n  }\n};\n\n/**\n * @param {number} z Zoom level.\n * @return {import(\"../TileRange.js\").default} Extent tile range for the specified zoom level.\n */\nTileGrid.prototype.getFullTileRange = function getFullTileRange (z) {\n  if (!this.fullTileRanges_) {\n    return null;\n  } else {\n    return this.fullTileRanges_[z];\n  }\n};\n\n/**\n * @param {number} resolution Resolution.\n * @param {number=} opt_direction If 0, the nearest resolution will be used.\n *   If 1, the nearest lower resolution will be used. If -1, the nearest\n *   higher resolution will be used. Default is 0.\n * @return {number} Z.\n * @api\n */\nTileGrid.prototype.getZForResolution = function getZForResolution (resolution, opt_direction) {\n  var z = linearFindNearest(this.resolutions_, resolution, opt_direction || 0);\n  return clamp(z, this.minZoom, this.maxZoom);\n};\n\n/**\n * @param {!import(\"../extent.js\").Extent} extent Extent for this tile grid.\n * @private\n */\nTileGrid.prototype.calculateTileRanges_ = function calculateTileRanges_ (extent) {\n  var length = this.resolutions_.length;\n  var fullTileRanges = new Array(length);\n  for (var z = this.minZoom; z < length; ++z) {\n    fullTileRanges[z] = this.getTileRangeForExtentAndZ(extent, z);\n  }\n  this.fullTileRanges_ = fullTileRanges;\n};\n\n\nexport default TileGrid;\n\n//# sourceMappingURL=TileGrid.js.map","/**\n * @module ol/tilegrid\n */\nimport {DEFAULT_MAX_ZOOM, DEFAULT_TILE_SIZE} from './tilegrid/common.js';\nimport {toSize} from './size.js';\nimport {containsCoordinate, createOrUpdate, getCorner, getHeight, getWidth} from './extent.js';\nimport Corner from './extent/Corner.js';\nimport {get as getProjection, METERS_PER_UNIT} from './proj.js';\nimport Units from './proj/Units.js';\nimport TileGrid from './tilegrid/TileGrid.js';\n\n\n/**\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @return {!TileGrid} Default tile grid for the\n * passed projection.\n */\nexport function getForProjection(projection) {\n  var tileGrid = projection.getDefaultTileGrid();\n  if (!tileGrid) {\n    tileGrid = createForProjection(projection);\n    projection.setDefaultTileGrid(tileGrid);\n  }\n  return tileGrid;\n}\n\n\n/**\n * @param {TileGrid} tileGrid Tile grid.\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @return {import(\"./tilecoord.js\").TileCoord} Tile coordinate.\n */\nexport function wrapX(tileGrid, tileCoord, projection) {\n  var z = tileCoord[0];\n  var center = tileGrid.getTileCoordCenter(tileCoord);\n  var projectionExtent = extentFromProjection(projection);\n  if (!containsCoordinate(projectionExtent, center)) {\n    var worldWidth = getWidth(projectionExtent);\n    var worldsAway = Math.ceil((projectionExtent[0] - center[0]) / worldWidth);\n    center[0] += worldWidth * worldsAway;\n    return tileGrid.getTileCoordForCoordAndZ(center, z);\n  } else {\n    return tileCoord;\n  }\n}\n\n\n/**\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number=} opt_maxZoom Maximum zoom level (default is\n *     DEFAULT_MAX_ZOOM).\n * @param {number|import(\"./size.js\").Size=} opt_tileSize Tile size (default uses\n *     DEFAULT_TILE_SIZE).\n * @param {Corner=} opt_corner Extent corner (default is `'top-left'`).\n * @return {!TileGrid} TileGrid instance.\n */\nexport function createForExtent(extent, opt_maxZoom, opt_tileSize, opt_corner) {\n  var corner = opt_corner !== undefined ? opt_corner : Corner.TOP_LEFT;\n\n  var resolutions = resolutionsFromExtent(extent, opt_maxZoom, opt_tileSize);\n\n  return new TileGrid({\n    extent: extent,\n    origin: getCorner(extent, corner),\n    resolutions: resolutions,\n    tileSize: opt_tileSize\n  });\n}\n\n\n/**\n * @typedef {Object} XYZOptions\n * @property {import(\"./extent.js\").Extent} [extent] Extent for the tile grid. The origin for an XYZ tile grid is the\n * top-left corner of the extent. The zero level of the grid is defined by the resolution at which one tile fits in the\n * provided extent. If not provided, the extent of the EPSG:3857 projection is used.\n * @property {number} [maxZoom] Maximum zoom. The default is `42`. This determines the number of levels\n * in the grid set. For example, a `maxZoom` of 21 means there are 22 levels in the grid set.\n * @property {number} [minZoom=0] Minimum zoom.\n * @property {number|import(\"./size.js\").Size} [tileSize=[256, 256]] Tile size in pixels.\n */\n\n\n/**\n * Creates a tile grid with a standard XYZ tiling scheme.\n * @param {XYZOptions=} opt_options Tile grid options.\n * @return {!TileGrid} Tile grid instance.\n * @api\n */\nexport function createXYZ(opt_options) {\n  /** @type {XYZOptions} */\n  var xyzOptions = opt_options || {};\n\n  var extent = xyzOptions.extent || getProjection('EPSG:3857').getExtent();\n\n  /** @type {import(\"./tilegrid/TileGrid.js\").Options} */\n  var gridOptions = {\n    extent: extent,\n    minZoom: xyzOptions.minZoom,\n    tileSize: xyzOptions.tileSize,\n    resolutions: resolutionsFromExtent(\n      extent,\n      xyzOptions.maxZoom,\n      xyzOptions.tileSize\n    )\n  };\n  return new TileGrid(gridOptions);\n}\n\n\n/**\n * Create a resolutions array from an extent.  A zoom factor of 2 is assumed.\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number=} opt_maxZoom Maximum zoom level (default is\n *     DEFAULT_MAX_ZOOM).\n * @param {number|import(\"./size.js\").Size=} opt_tileSize Tile size (default uses\n *     DEFAULT_TILE_SIZE).\n * @return {!Array<number>} Resolutions array.\n */\nfunction resolutionsFromExtent(extent, opt_maxZoom, opt_tileSize) {\n  var maxZoom = opt_maxZoom !== undefined ?\n    opt_maxZoom : DEFAULT_MAX_ZOOM;\n\n  var height = getHeight(extent);\n  var width = getWidth(extent);\n\n  var tileSize = toSize(opt_tileSize !== undefined ?\n    opt_tileSize : DEFAULT_TILE_SIZE);\n  var maxResolution = Math.max(\n    width / tileSize[0], height / tileSize[1]);\n\n  var length = maxZoom + 1;\n  var resolutions = new Array(length);\n  for (var z = 0; z < length; ++z) {\n    resolutions[z] = maxResolution / Math.pow(2, z);\n  }\n  return resolutions;\n}\n\n\n/**\n * @param {import(\"./proj.js\").ProjectionLike} projection Projection.\n * @param {number=} opt_maxZoom Maximum zoom level (default is\n *     DEFAULT_MAX_ZOOM).\n * @param {number|import(\"./size.js\").Size=} opt_tileSize Tile size (default uses\n *     DEFAULT_TILE_SIZE).\n * @param {Corner=} opt_corner Extent corner (default is `'top-left'`).\n * @return {!TileGrid} TileGrid instance.\n */\nexport function createForProjection(projection, opt_maxZoom, opt_tileSize, opt_corner) {\n  var extent = extentFromProjection(projection);\n  return createForExtent(extent, opt_maxZoom, opt_tileSize, opt_corner);\n}\n\n\n/**\n * Generate a tile grid extent from a projection.  If the projection has an\n * extent, it is used.  If not, a global extent is assumed.\n * @param {import(\"./proj.js\").ProjectionLike} projection Projection.\n * @return {import(\"./extent.js\").Extent} Extent.\n */\nexport function extentFromProjection(projection) {\n  projection = getProjection(projection);\n  var extent = projection.getExtent();\n  if (!extent) {\n    var half = 180 * METERS_PER_UNIT[Units.DEGREES] / projection.getMetersPerUnit();\n    extent = createOrUpdate(-half, -half, half, half);\n  }\n  return extent;\n}\n\n//# sourceMappingURL=tilegrid.js.map","/**\n * @module ol/source/Tile\n */\nimport {abstract} from '../util.js';\nimport TileCache from '../TileCache.js';\nimport TileState from '../TileState.js';\nimport Event from '../events/Event.js';\nimport {equivalent} from '../proj.js';\nimport {toSize, scale as scaleSize} from '../size.js';\nimport Source from './Source.js';\nimport {getKeyZXY, withinExtentAndZ} from '../tilecoord.js';\nimport {wrapX, getForProjection as getTileGridForProjection} from '../tilegrid.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions]\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize]\n * @property {boolean} [opaque]\n * @property {number} [tilePixelRatio]\n * @property {import(\"../proj.js\").ProjectionLike} [projection]\n * @property {import(\"./State.js\").default} [state]\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid]\n * @property {boolean} [wrapX=true]\n * @property {number} [transition]\n * @property {string} [key]\n */\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for sources providing images divided into a tile grid.\n * @abstract\n * @api\n */\nvar TileSource = /*@__PURE__*/(function (Source) {\n  function TileSource(options) {\n\n    Source.call(this, {\n      attributions: options.attributions,\n      attributionsCollapsible: options.attributionsCollapsible,\n      projection: options.projection,\n      state: options.state,\n      wrapX: options.wrapX\n    });\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.opaque_ = options.opaque !== undefined ? options.opaque : false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.tilePixelRatio_ = options.tilePixelRatio !== undefined ?\n      options.tilePixelRatio : 1;\n\n    /**\n     * @protected\n     * @type {import(\"../tilegrid/TileGrid.js\").default}\n     */\n    this.tileGrid = options.tileGrid !== undefined ? options.tileGrid : null;\n\n    /**\n     * @protected\n     * @type {import(\"../TileCache.js\").default}\n     */\n    this.tileCache = new TileCache(options.cacheSize);\n\n    /**\n     * @protected\n     * @type {import(\"../size.js\").Size}\n     */\n    this.tmpSize = [0, 0];\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.key_ = options.key || '';\n\n    /**\n     * @protected\n     * @type {import(\"../Tile.js\").Options}\n     */\n    this.tileOptions = {transition: options.transition};\n\n  }\n\n  if ( Source ) TileSource.__proto__ = Source;\n  TileSource.prototype = Object.create( Source && Source.prototype );\n  TileSource.prototype.constructor = TileSource;\n\n  /**\n   * @return {boolean} Can expire cache.\n   */\n  TileSource.prototype.canExpireCache = function canExpireCache () {\n    return this.tileCache.canExpireCache();\n  };\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @param {!Object<string, import(\"../TileRange.js\").default>} usedTiles Used tiles.\n   */\n  TileSource.prototype.expireCache = function expireCache (projection, usedTiles) {\n    var tileCache = this.getTileCacheForProjection(projection);\n    if (tileCache) {\n      tileCache.expireCache(usedTiles);\n    }\n  };\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @param {number} z Zoom level.\n   * @param {import(\"../TileRange.js\").default} tileRange Tile range.\n   * @param {function(import(\"../Tile.js\").default):(boolean|void)} callback Called with each\n   *     loaded tile.  If the callback returns `false`, the tile will not be\n   *     considered loaded.\n   * @return {boolean} The tile range is fully covered with loaded tiles.\n   */\n  TileSource.prototype.forEachLoadedTile = function forEachLoadedTile (projection, z, tileRange, callback) {\n    var tileCache = this.getTileCacheForProjection(projection);\n    if (!tileCache) {\n      return false;\n    }\n\n    var covered = true;\n    var tile, tileCoordKey, loaded;\n    for (var x = tileRange.minX; x <= tileRange.maxX; ++x) {\n      for (var y = tileRange.minY; y <= tileRange.maxY; ++y) {\n        tileCoordKey = getKeyZXY(z, x, y);\n        loaded = false;\n        if (tileCache.containsKey(tileCoordKey)) {\n          tile = /** @type {!import(\"../Tile.js\").default} */ (tileCache.get(tileCoordKey));\n          loaded = tile.getState() === TileState.LOADED;\n          if (loaded) {\n            loaded = (callback(tile) !== false);\n          }\n        }\n        if (!loaded) {\n          covered = false;\n        }\n      }\n    }\n    return covered;\n  };\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {number} Gutter.\n   */\n  TileSource.prototype.getGutterForProjection = function getGutterForProjection (projection) {\n    return 0;\n  };\n\n  /**\n   * Return the key to be used for all tiles in the source.\n   * @return {string} The key for all tiles.\n   * @protected\n   */\n  TileSource.prototype.getKey = function getKey () {\n    return this.key_;\n  };\n\n  /**\n   * Set the value to be used as the key for all tiles in the source.\n   * @param {string} key The key for tiles.\n   * @protected\n   */\n  TileSource.prototype.setKey = function setKey (key) {\n    if (this.key_ !== key) {\n      this.key_ = key;\n      this.changed();\n    }\n  };\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {boolean} Opaque.\n   */\n  TileSource.prototype.getOpaque = function getOpaque (projection) {\n    return this.opaque_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  TileSource.prototype.getResolutions = function getResolutions () {\n    return this.tileGrid.getResolutions();\n  };\n\n  /**\n   * @abstract\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {!import(\"../Tile.js\").default} Tile.\n   */\n  TileSource.prototype.getTile = function getTile (z, x, y, pixelRatio, projection) {\n    return abstract();\n  };\n\n  /**\n   * Return the tile grid of the tile source.\n   * @return {import(\"../tilegrid/TileGrid.js\").default} Tile grid.\n   * @api\n   */\n  TileSource.prototype.getTileGrid = function getTileGrid () {\n    return this.tileGrid;\n  };\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {!import(\"../tilegrid/TileGrid.js\").default} Tile grid.\n   */\n  TileSource.prototype.getTileGridForProjection = function getTileGridForProjection$1 (projection) {\n    if (!this.tileGrid) {\n      return getTileGridForProjection(projection);\n    } else {\n      return this.tileGrid;\n    }\n  };\n\n  /**\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {import(\"../TileCache.js\").default} Tile cache.\n   * @protected\n   */\n  TileSource.prototype.getTileCacheForProjection = function getTileCacheForProjection (projection) {\n    var thisProj = this.getProjection();\n    if (thisProj && !equivalent(thisProj, projection)) {\n      return null;\n    } else {\n      return this.tileCache;\n    }\n  };\n\n  /**\n   * Get the tile pixel ratio for this source. Subclasses may override this\n   * method, which is meant to return a supported pixel ratio that matches the\n   * provided `pixelRatio` as close as possible.\n   * @param {number} pixelRatio Pixel ratio.\n   * @return {number} Tile pixel ratio.\n   */\n  TileSource.prototype.getTilePixelRatio = function getTilePixelRatio (pixelRatio) {\n    return this.tilePixelRatio_;\n  };\n\n  /**\n   * @param {number} z Z.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {import(\"../size.js\").Size} Tile size.\n   */\n  TileSource.prototype.getTilePixelSize = function getTilePixelSize (z, pixelRatio, projection) {\n    var tileGrid = this.getTileGridForProjection(projection);\n    var tilePixelRatio = this.getTilePixelRatio(pixelRatio);\n    var tileSize = toSize(tileGrid.getTileSize(z), this.tmpSize);\n    if (tilePixelRatio == 1) {\n      return tileSize;\n    } else {\n      return scaleSize(tileSize, tilePixelRatio, this.tmpSize);\n    }\n  };\n\n  /**\n   * Returns a tile coordinate wrapped around the x-axis. When the tile coordinate\n   * is outside the resolution and extent range of the tile grid, `null` will be\n   * returned.\n   * @param {import(\"../tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n   * @param {import(\"../proj/Projection.js\").default=} opt_projection Projection.\n   * @return {import(\"../tilecoord.js\").TileCoord} Tile coordinate to be passed to the tileUrlFunction or\n   *     null if no tile URL should be created for the passed `tileCoord`.\n   */\n  TileSource.prototype.getTileCoordForTileUrlFunction = function getTileCoordForTileUrlFunction (tileCoord, opt_projection) {\n    var projection = opt_projection !== undefined ?\n      opt_projection : this.getProjection();\n    var tileGrid = this.getTileGridForProjection(projection);\n    if (this.getWrapX() && projection.isGlobal()) {\n      tileCoord = wrapX(tileGrid, tileCoord, projection);\n    }\n    return withinExtentAndZ(tileCoord, tileGrid) ? tileCoord : null;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  TileSource.prototype.refresh = function refresh () {\n    this.tileCache.clear();\n    this.changed();\n  };\n\n  /**\n   * Marks a tile coord as being used, without triggering a load.\n   * @abstract\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   */\n  TileSource.prototype.useTile = function useTile (z, x, y, projection) {};\n\n  return TileSource;\n}(Source));\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/source/Tile~TileSource} instances are instances of this\n * type.\n */\nexport var TileSourceEvent = /*@__PURE__*/(function (Event) {\n  function TileSourceEvent(type, tile) {\n\n    Event.call(this, type);\n\n    /**\n     * The tile related to the event.\n     * @type {import(\"../Tile.js\").default}\n     * @api\n     */\n    this.tile = tile;\n\n  }\n\n  if ( Event ) TileSourceEvent.__proto__ = Event;\n  TileSourceEvent.prototype = Object.create( Event && Event.prototype );\n  TileSourceEvent.prototype.constructor = TileSourceEvent;\n\n  return TileSourceEvent;\n}(Event));\n\nexport default TileSource;\n\n//# sourceMappingURL=Tile.js.map","/**\n * @module ol/renderer/webgl/tilelayershader\n */\n// This file is automatically generated, do not edit.\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../webgl.js';\nimport WebGLFragment from '../../webgl/Fragment.js';\nimport WebGLVertex from '../../webgl/Vertex.js';\n\nexport var fragment = new WebGLFragment(DEBUG_WEBGL ?\n  'precision mediump float;\\nvarying vec2 v_texCoord;\\n\\n\\nuniform sampler2D u_texture;\\n\\nvoid main(void) {\\n  gl_FragColor = texture2D(u_texture, v_texCoord);\\n}\\n' :\n  'precision mediump float;varying vec2 a;uniform sampler2D e;void main(void){gl_FragColor=texture2D(e,a);}');\n\nexport var vertex = new WebGLVertex(DEBUG_WEBGL ?\n  'varying vec2 v_texCoord;\\n\\n\\nattribute vec2 a_position;\\nattribute vec2 a_texCoord;\\nuniform vec4 u_tileOffset;\\n\\nvoid main(void) {\\n  gl_Position = vec4(a_position * u_tileOffset.xy + u_tileOffset.zw, 0., 1.);\\n  v_texCoord = a_texCoord;\\n}\\n\\n\\n' :\n  'varying vec2 a;attribute vec2 b;attribute vec2 c;uniform vec4 d;void main(void){gl_Position=vec4(b*d.xy+d.zw,0.,1.);a=c;}');\n\n//# sourceMappingURL=tilelayershader.js.map","/**\n * @module ol/renderer/webgl/tilelayershader/Locations\n */\n// This file is automatically generated, do not edit\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../webgl.js';\n\nvar Locations = function Locations(gl, program) {\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_tileOffset = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_tileOffset' : 'd');\n\n  /**\n   * @type {WebGLUniformLocation}\n   */\n  this.u_texture = gl.getUniformLocation(\n    program, DEBUG_WEBGL ? 'u_texture' : 'e');\n\n  /**\n   * @type {number}\n   */\n  this.a_position = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_position' : 'b');\n\n  /**\n   * @type {number}\n   */\n  this.a_texCoord = gl.getAttribLocation(\n    program, DEBUG_WEBGL ? 'a_texCoord' : 'c');\n\n};\n\nexport default Locations;\n\n//# sourceMappingURL=Locations.js.map","/**\n * @module ol/renderer/webgl/TileLayer\n */\n// FIXME large resolutions lead to too large framebuffers :-(\n// FIXME animated shaders! check in redraw\n\nimport LayerType from '../../LayerType.js';\nimport ImageTile from '../../ImageTile.js';\nimport TileRange from '../../TileRange.js';\nimport TileState from '../../TileState.js';\nimport TileSource from '../../source/Tile.js';\nimport {numberSafeCompareFunction} from '../../array.js';\nimport {createEmpty, intersects} from '../../extent.js';\nimport {roundUpToPowerOfTwo} from '../../math.js';\nimport WebGLLayerRenderer from './Layer.js';\nimport {fragment, vertex} from './tilelayershader.js';\nimport Locations from './tilelayershader/Locations.js';\nimport {toSize} from '../../size.js';\nimport {\n  reset as resetTransform,\n  rotate as rotateTransform,\n  scale as scaleTransform,\n  translate as translateTransform,\n  apply as applyTransform\n} from '../../transform.js';\nimport {COLOR_BUFFER_BIT, BLEND, ARRAY_BUFFER, FLOAT, LINEAR, TRIANGLE_STRIP} from '../../webgl.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\n\n/**\n * @classdesc\n * WebGL renderer for tile layers.\n * @api\n */\nvar WebGLTileLayerRenderer = /*@__PURE__*/(function (WebGLLayerRenderer) {\n  function WebGLTileLayerRenderer(mapRenderer, tileLayer) {\n\n    WebGLLayerRenderer.call(this, mapRenderer, tileLayer);\n\n    /**\n     * @private\n     * @type {import(\"../../webgl/Fragment.js\").default}\n     */\n    this.fragmentShader_ = fragment;\n\n    /**\n     * @private\n     * @type {import(\"../../webgl/Vertex.js\").default}\n     */\n    this.vertexShader_ = vertex;\n\n    /**\n     * @private\n     * @type {import(\"./tilelayershader/Locations.js\").default}\n     */\n    this.locations_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../webgl/Buffer.js\").default}\n     */\n    this.renderArrayBuffer_ = new WebGLBuffer([\n      0, 0, 0, 1,\n      1, 0, 1, 1,\n      0, 1, 0, 0,\n      1, 1, 1, 0\n    ]);\n\n    /**\n     * @private\n     * @type {import(\"../../TileRange.js\").default}\n     */\n    this.renderedTileRange_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.renderedFramebufferExtent_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedRevision_ = -1;\n\n    /**\n     * @private\n     * @type {import(\"../../size.js\").Size}\n     */\n    this.tmpSize_ = [0, 0];\n\n  }\n\n  if ( WebGLLayerRenderer ) WebGLTileLayerRenderer.__proto__ = WebGLLayerRenderer;\n  WebGLTileLayerRenderer.prototype = Object.create( WebGLLayerRenderer && WebGLLayerRenderer.prototype );\n  WebGLTileLayerRenderer.prototype.constructor = WebGLTileLayerRenderer;\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTileLayerRenderer.prototype.disposeInternal = function disposeInternal () {\n    var context = this.mapRenderer.getContext();\n    context.deleteBuffer(this.renderArrayBuffer_);\n    WebGLLayerRenderer.prototype.disposeInternal.call(this);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTileLayerRenderer.prototype.createLoadedTileFinder = function createLoadedTileFinder (source, projection, tiles) {\n    var mapRenderer = this.mapRenderer;\n\n    return (\n      /**\n       * @param {number} zoom Zoom level.\n       * @param {import(\"../../TileRange.js\").default} tileRange Tile range.\n       * @return {boolean} The tile range is fully loaded.\n       */\n      function(zoom, tileRange) {\n        function callback(tile) {\n          var loaded = mapRenderer.isTileTextureLoaded(tile);\n          if (loaded) {\n            if (!tiles[zoom]) {\n              tiles[zoom] = {};\n            }\n            tiles[zoom][tile.tileCoord.toString()] = tile;\n          }\n          return loaded;\n        }\n        return source.forEachLoadedTile(projection, zoom, tileRange, callback);\n      }\n    );\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTileLayerRenderer.prototype.handleWebGLContextLost = function handleWebGLContextLost () {\n    WebGLLayerRenderer.prototype.handleWebGLContextLost.call(this);\n    this.locations_ = null;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTileLayerRenderer.prototype.prepareFrame = function prepareFrame (frameState, layerState, context) {\n\n    var mapRenderer = this.mapRenderer;\n    var gl = context.getGL();\n\n    var viewState = frameState.viewState;\n    var projection = viewState.projection;\n\n    var tileLayer = /** @type {import(\"../../layer/Tile.js\").default} */ (this.getLayer());\n    var tileSource = tileLayer.getSource();\n    if (!(tileSource instanceof TileSource)) {\n      return true;\n    }\n\n    var tileGrid = tileSource.getTileGridForProjection(projection);\n    var z = tileGrid.getZForResolution(viewState.resolution);\n    var tileResolution = tileGrid.getResolution(z);\n\n    var tilePixelSize =\n        tileSource.getTilePixelSize(z, frameState.pixelRatio, projection);\n    var pixelRatio = tilePixelSize[0] /\n        toSize(tileGrid.getTileSize(z), this.tmpSize_)[0];\n    var tilePixelResolution = tileResolution / pixelRatio;\n    var tileGutter = tileSource.getTilePixelRatio(pixelRatio) * tileSource.getGutterForProjection(projection);\n\n    var center = viewState.center;\n    var extent = frameState.extent;\n    var tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z);\n\n    var framebufferExtent;\n    if (this.renderedTileRange_ &&\n        this.renderedTileRange_.equals(tileRange) &&\n        this.renderedRevision_ == tileSource.getRevision()) {\n      framebufferExtent = this.renderedFramebufferExtent_;\n    } else {\n\n      var tileRangeSize = tileRange.getSize();\n\n      var maxDimension = Math.max(\n        tileRangeSize[0] * tilePixelSize[0],\n        tileRangeSize[1] * tilePixelSize[1]);\n      var framebufferDimension = roundUpToPowerOfTwo(maxDimension);\n      var framebufferExtentDimension = tilePixelResolution * framebufferDimension;\n      var origin = tileGrid.getOrigin(z);\n      var minX = origin[0] +\n          tileRange.minX * tilePixelSize[0] * tilePixelResolution;\n      var minY = origin[1] +\n          tileRange.minY * tilePixelSize[1] * tilePixelResolution;\n      framebufferExtent = [\n        minX, minY,\n        minX + framebufferExtentDimension, minY + framebufferExtentDimension\n      ];\n\n      this.bindFramebuffer(frameState, framebufferDimension);\n      gl.viewport(0, 0, framebufferDimension, framebufferDimension);\n\n      gl.clearColor(0, 0, 0, 0);\n      gl.clear(COLOR_BUFFER_BIT);\n      gl.disable(BLEND);\n\n      var program = context.getProgram(this.fragmentShader_, this.vertexShader_);\n      context.useProgram(program);\n      if (!this.locations_) {\n        this.locations_ = new Locations(gl, program);\n      }\n\n      context.bindBuffer(ARRAY_BUFFER, this.renderArrayBuffer_);\n      gl.enableVertexAttribArray(this.locations_.a_position);\n      gl.vertexAttribPointer(\n        this.locations_.a_position, 2, FLOAT, false, 16, 0);\n      gl.enableVertexAttribArray(this.locations_.a_texCoord);\n      gl.vertexAttribPointer(\n        this.locations_.a_texCoord, 2, FLOAT, false, 16, 8);\n      gl.uniform1i(this.locations_.u_texture, 0);\n\n      /**\n       * @type {Object<number, Object<string, import(\"../../Tile.js\").default>>}\n       */\n      var tilesToDrawByZ = {};\n      tilesToDrawByZ[z] = {};\n\n      var findLoadedTiles = this.createLoadedTileFinder(\n        tileSource, projection, tilesToDrawByZ);\n\n      var useInterimTilesOnError = tileLayer.getUseInterimTilesOnError();\n      var allTilesLoaded = true;\n      var tmpExtent = createEmpty();\n      var tmpTileRange = new TileRange(0, 0, 0, 0);\n      var childTileRange, drawable, fullyLoaded, tile, tileState;\n      var x, y, tileExtent;\n      for (x = tileRange.minX; x <= tileRange.maxX; ++x) {\n        for (y = tileRange.minY; y <= tileRange.maxY; ++y) {\n\n          tile = tileSource.getTile(z, x, y, pixelRatio, projection);\n          if (layerState.extent !== undefined) {\n            // ignore tiles outside layer extent\n            tileExtent = tileGrid.getTileCoordExtent(tile.tileCoord, tmpExtent);\n            if (!intersects(tileExtent, layerState.extent)) {\n              continue;\n            }\n          }\n          tileState = tile.getState();\n          drawable = tileState == TileState.LOADED ||\n              tileState == TileState.EMPTY ||\n              tileState == TileState.ERROR && !useInterimTilesOnError;\n          if (!drawable) {\n            tile = tile.getInterimTile();\n          }\n          tileState = tile.getState();\n          if (tileState == TileState.LOADED) {\n            if (mapRenderer.isTileTextureLoaded(tile)) {\n              tilesToDrawByZ[z][tile.tileCoord.toString()] = tile;\n              continue;\n            }\n          } else if (tileState == TileState.EMPTY ||\n                     (tileState == TileState.ERROR &&\n                      !useInterimTilesOnError)) {\n            continue;\n          }\n\n          allTilesLoaded = false;\n          fullyLoaded = tileGrid.forEachTileCoordParentTileRange(\n            tile.tileCoord, findLoadedTiles, null, tmpTileRange, tmpExtent);\n          if (!fullyLoaded) {\n            childTileRange = tileGrid.getTileCoordChildTileRange(\n              tile.tileCoord, tmpTileRange, tmpExtent);\n            if (childTileRange) {\n              findLoadedTiles(z + 1, childTileRange);\n            }\n          }\n\n        }\n\n      }\n\n      /** @type {Array<number>} */\n      var zs = Object.keys(tilesToDrawByZ).map(Number);\n      zs.sort(numberSafeCompareFunction);\n      var u_tileOffset = new Float32Array(4);\n      for (var i = 0, ii = zs.length; i < ii; ++i) {\n        var tilesToDraw = tilesToDrawByZ[zs[i]];\n        for (var tileKey in tilesToDraw) {\n          tile = tilesToDraw[tileKey];\n\n          if (!(tile instanceof ImageTile)) {\n            continue;\n          }\n\n          tileExtent = tileGrid.getTileCoordExtent(tile.tileCoord, tmpExtent);\n          u_tileOffset[0] = 2 * (tileExtent[2] - tileExtent[0]) /\n              framebufferExtentDimension;\n          u_tileOffset[1] = 2 * (tileExtent[3] - tileExtent[1]) /\n              framebufferExtentDimension;\n          u_tileOffset[2] = 2 * (tileExtent[0] - framebufferExtent[0]) /\n              framebufferExtentDimension - 1;\n          u_tileOffset[3] = 2 * (tileExtent[1] - framebufferExtent[1]) /\n              framebufferExtentDimension - 1;\n          gl.uniform4fv(this.locations_.u_tileOffset, u_tileOffset);\n          mapRenderer.bindTileTexture(tile, tilePixelSize,\n            tileGutter * pixelRatio, LINEAR, LINEAR);\n          gl.drawArrays(TRIANGLE_STRIP, 0, 4);\n        }\n      }\n\n      if (allTilesLoaded) {\n        this.renderedTileRange_ = tileRange;\n        this.renderedFramebufferExtent_ = framebufferExtent;\n        this.renderedRevision_ = tileSource.getRevision();\n      } else {\n        this.renderedTileRange_ = null;\n        this.renderedFramebufferExtent_ = null;\n        this.renderedRevision_ = -1;\n        frameState.animate = true;\n      }\n\n    }\n\n    this.updateUsedTiles(frameState.usedTiles, tileSource, z, tileRange);\n    var tileTextureQueue = mapRenderer.getTileTextureQueue();\n    this.manageTilePyramid(\n      frameState, tileSource, tileGrid, pixelRatio, projection, extent, z,\n      tileLayer.getPreload(),\n      /**\n       * @param {import(\"../../Tile.js\").default} tile Tile.\n       */\n      function(tile) {\n        if (tile.getState() == TileState.LOADED &&\n              !mapRenderer.isTileTextureLoaded(tile) &&\n              !tileTextureQueue.isKeyQueued(tile.getKey())) {\n          tileTextureQueue.enqueue([\n            tile,\n            tileGrid.getTileCoordCenter(tile.tileCoord),\n            tileGrid.getResolution(tile.tileCoord[0]),\n            tilePixelSize, tileGutter * pixelRatio\n          ]);\n        }\n      }, this);\n    this.scheduleExpireCache(frameState, tileSource);\n\n    var texCoordMatrix = this.texCoordMatrix;\n    resetTransform(texCoordMatrix);\n    translateTransform(texCoordMatrix,\n      (Math.round(center[0] / tileResolution) * tileResolution - framebufferExtent[0]) /\n            (framebufferExtent[2] - framebufferExtent[0]),\n      (Math.round(center[1] / tileResolution) * tileResolution - framebufferExtent[1]) /\n            (framebufferExtent[3] - framebufferExtent[1]));\n    if (viewState.rotation !== 0) {\n      rotateTransform(texCoordMatrix, viewState.rotation);\n    }\n    scaleTransform(texCoordMatrix,\n      frameState.size[0] * viewState.resolution /\n            (framebufferExtent[2] - framebufferExtent[0]),\n      frameState.size[1] * viewState.resolution /\n            (framebufferExtent[3] - framebufferExtent[1]));\n    translateTransform(texCoordMatrix, -0.5, -0.5);\n\n    return true;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLTileLayerRenderer.prototype.forEachLayerAtPixel = function forEachLayerAtPixel (pixel, frameState, callback, thisArg) {\n    if (!this.framebuffer) {\n      return undefined;\n    }\n\n    var pixelOnMapScaled = [\n      pixel[0] / frameState.size[0],\n      (frameState.size[1] - pixel[1]) / frameState.size[1]];\n\n    var pixelOnFrameBufferScaled = applyTransform(\n      this.texCoordMatrix, pixelOnMapScaled.slice());\n    var pixelOnFrameBuffer = [\n      pixelOnFrameBufferScaled[0] * this.framebufferDimension,\n      pixelOnFrameBufferScaled[1] * this.framebufferDimension];\n\n    var gl = this.mapRenderer.getContext().getGL();\n    gl.bindFramebuffer(gl.FRAMEBUFFER, this.framebuffer);\n    var imageData = new Uint8Array(4);\n    gl.readPixels(pixelOnFrameBuffer[0], pixelOnFrameBuffer[1], 1, 1,\n      gl.RGBA, gl.UNSIGNED_BYTE, imageData);\n\n    if (imageData[3] > 0) {\n      return callback.call(thisArg, this.getLayer(), imageData);\n    } else {\n      return undefined;\n    }\n  };\n\n  return WebGLTileLayerRenderer;\n}(WebGLLayerRenderer));\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {import(\"../../layer/Layer.js\").default} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nWebGLTileLayerRenderer['handles'] = function(layer) {\n  return layer.getType() === LayerType.TILE;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {import(\"../Map.js\").default} mapRenderer The map renderer.\n * @param {import(\"../../layer/Layer.js\").default} layer The layer to be rendererd.\n * @return {WebGLTileLayerRenderer} The layer renderer.\n */\nWebGLTileLayerRenderer['create'] = function(mapRenderer, layer) {\n  return new WebGLTileLayerRenderer(\n    /** @type {import(\"./Map.js\").default} */ (mapRenderer),\n    /** @type {import(\"../../layer/Tile.js\").default} */ (layer)\n  );\n};\n\n\nexport default WebGLTileLayerRenderer;\n\n//# sourceMappingURL=TileLayer.js.map","/**\n * @module ol/renderer/webgl/VectorLayer\n */\nimport {getUid} from '../../util.js';\nimport LayerType from '../../LayerType.js';\nimport ViewHint from '../../ViewHint.js';\nimport {buffer, containsExtent, createEmpty} from '../../extent.js';\nimport WebGLReplayGroup from '../../render/webgl/ReplayGroup.js';\nimport {defaultOrder as defaultRenderOrder, getTolerance as getRenderTolerance, getSquaredTolerance as getSquaredRenderTolerance, renderFeature} from '../vector.js';\nimport WebGLLayerRenderer from './Layer.js';\nimport {apply as applyTransform} from '../../transform.js';\n\n\n/**\n * @classdesc\n * WebGL renderer for vector layers.\n * @api\n */\nvar WebGLVectorLayerRenderer = /*@__PURE__*/(function (WebGLLayerRenderer) {\n  function WebGLVectorLayerRenderer(mapRenderer, vectorLayer) {\n\n    WebGLLayerRenderer.call(this, mapRenderer, vectorLayer);\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.dirty_ = false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedRevision_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.renderedResolution_ = NaN;\n\n    /**\n     * @private\n     * @type {import(\"../../extent.js\").Extent}\n     */\n    this.renderedExtent_ = createEmpty();\n\n    /**\n     * @private\n     * @type {function(import(\"../../Feature.js\").default, import(\"../../Feature.js\").default): number|null}\n     */\n    this.renderedRenderOrder_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../../render/webgl/ReplayGroup.js\").default}\n     */\n    this.replayGroup_ = null;\n\n    /**\n     * The last layer state.\n     * @private\n     * @type {?import(\"../../layer/Layer.js\").State}\n     */\n    this.layerState_ = null;\n\n  }\n\n  if ( WebGLLayerRenderer ) WebGLVectorLayerRenderer.__proto__ = WebGLLayerRenderer;\n  WebGLVectorLayerRenderer.prototype = Object.create( WebGLLayerRenderer && WebGLLayerRenderer.prototype );\n  WebGLVectorLayerRenderer.prototype.constructor = WebGLVectorLayerRenderer;\n\n  /**\n   * @inheritDoc\n   */\n  WebGLVectorLayerRenderer.prototype.composeFrame = function composeFrame (frameState, layerState, context) {\n    this.layerState_ = layerState;\n    var viewState = frameState.viewState;\n    var replayGroup = this.replayGroup_;\n    var size = frameState.size;\n    var pixelRatio = frameState.pixelRatio;\n    var gl = this.mapRenderer.getGL();\n    if (replayGroup && !replayGroup.isEmpty()) {\n      gl.enable(gl.SCISSOR_TEST);\n      gl.scissor(0, 0, size[0] * pixelRatio, size[1] * pixelRatio);\n      replayGroup.replay(context,\n        viewState.center, viewState.resolution, viewState.rotation,\n        size, pixelRatio, layerState.opacity,\n        layerState.managed ? frameState.skippedFeatureUids : {});\n      gl.disable(gl.SCISSOR_TEST);\n    }\n\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLVectorLayerRenderer.prototype.disposeInternal = function disposeInternal () {\n    var replayGroup = this.replayGroup_;\n    if (replayGroup) {\n      var context = this.mapRenderer.getContext();\n      replayGroup.getDeleteResourcesFunction(context)();\n      this.replayGroup_ = null;\n    }\n    WebGLLayerRenderer.prototype.disposeInternal.call(this);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLVectorLayerRenderer.prototype.forEachFeatureAtCoordinate = function forEachFeatureAtCoordinate (coordinate, frameState, hitTolerance, callback, thisArg) {\n    if (!this.replayGroup_ || !this.layerState_) {\n      return undefined;\n    } else {\n      var context = this.mapRenderer.getContext();\n      var viewState = frameState.viewState;\n      var layer = this.getLayer();\n      var layerState = this.layerState_;\n      /** @type {!Object<string, boolean>} */\n      var features = {};\n      return this.replayGroup_.forEachFeatureAtCoordinate(coordinate,\n        context, viewState.center, viewState.resolution, viewState.rotation,\n        frameState.size, frameState.pixelRatio, layerState.opacity,\n        {},\n        /**\n         * @param {import(\"../../Feature.js\").FeatureLike} feature Feature.\n         * @return {?} Callback result.\n         */\n        function(feature) {\n          var key = getUid(feature);\n          if (!(key in features)) {\n            features[key] = true;\n            return callback.call(thisArg, feature, layer);\n          }\n        });\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLVectorLayerRenderer.prototype.hasFeatureAtCoordinate = function hasFeatureAtCoordinate (coordinate, frameState) {\n    if (!this.replayGroup_ || !this.layerState_) {\n      return false;\n    } else {\n      var context = this.mapRenderer.getContext();\n      var viewState = frameState.viewState;\n      var layerState = this.layerState_;\n      return this.replayGroup_.hasFeatureAtCoordinate(coordinate,\n        context, viewState.center, viewState.resolution, viewState.rotation,\n        frameState.size, frameState.pixelRatio, layerState.opacity,\n        frameState.skippedFeatureUids);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLVectorLayerRenderer.prototype.forEachLayerAtPixel = function forEachLayerAtPixel (pixel, frameState, callback, thisArg) {\n    var coordinate = applyTransform(\n      frameState.pixelToCoordinateTransform, pixel.slice());\n    var hasFeature = this.hasFeatureAtCoordinate(coordinate, frameState);\n\n    if (hasFeature) {\n      return callback.call(thisArg, this.getLayer(), null);\n    } else {\n      return undefined;\n    }\n  };\n\n  /**\n   * Handle changes in image style state.\n   * @param {import(\"../../events/Event.js\").default} event Image style change event.\n   * @private\n   */\n  WebGLVectorLayerRenderer.prototype.handleStyleImageChange_ = function handleStyleImageChange_ (event) {\n    this.renderIfReadyAndVisible();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  WebGLVectorLayerRenderer.prototype.prepareFrame = function prepareFrame (frameState, layerState, context) {\n    var vectorLayer = /** @type {import(\"../../layer/Vector.js\").default} */ (this.getLayer());\n    var vectorSource = /** @type {import(\"../../source/Vector.js\").default} */ (vectorLayer.getSource());\n\n    var animating = frameState.viewHints[ViewHint.ANIMATING];\n    var interacting = frameState.viewHints[ViewHint.INTERACTING];\n    var updateWhileAnimating = vectorLayer.getUpdateWhileAnimating();\n    var updateWhileInteracting = vectorLayer.getUpdateWhileInteracting();\n\n    if (!this.dirty_ && (!updateWhileAnimating && animating) ||\n        (!updateWhileInteracting && interacting)) {\n      return true;\n    }\n\n    var frameStateExtent = frameState.extent;\n    var viewState = frameState.viewState;\n    var projection = viewState.projection;\n    var resolution = viewState.resolution;\n    var pixelRatio = frameState.pixelRatio;\n    var vectorLayerRevision = vectorLayer.getRevision();\n    var vectorLayerRenderBuffer = vectorLayer.getRenderBuffer();\n    var vectorLayerRenderOrder = vectorLayer.getRenderOrder();\n\n    if (vectorLayerRenderOrder === undefined) {\n      vectorLayerRenderOrder = defaultRenderOrder;\n    }\n\n    var extent = buffer(frameStateExtent,\n      vectorLayerRenderBuffer * resolution);\n\n    if (!this.dirty_ &&\n        this.renderedResolution_ == resolution &&\n        this.renderedRevision_ == vectorLayerRevision &&\n        this.renderedRenderOrder_ == vectorLayerRenderOrder &&\n        containsExtent(this.renderedExtent_, extent)) {\n      return true;\n    }\n\n    if (this.replayGroup_) {\n      frameState.postRenderFunctions.push(\n        this.replayGroup_.getDeleteResourcesFunction(context));\n    }\n\n    this.dirty_ = false;\n\n    var replayGroup = new WebGLReplayGroup(\n      getRenderTolerance(resolution, pixelRatio),\n      extent, vectorLayer.getRenderBuffer());\n    vectorSource.loadFeatures(extent, resolution, projection);\n    /**\n     * @param {import(\"../../Feature.js\").default} feature Feature.\n     * @this {WebGLVectorLayerRenderer}\n     */\n    var render = function(feature) {\n      var styles;\n      var styleFunction = feature.getStyleFunction() || vectorLayer.getStyleFunction();\n      if (styleFunction) {\n        styles = styleFunction(feature, resolution);\n      }\n      if (styles) {\n        var dirty = this.renderFeature(\n          feature, resolution, pixelRatio, styles, replayGroup);\n        this.dirty_ = this.dirty_ || dirty;\n      }\n    }.bind(this);\n    if (vectorLayerRenderOrder) {\n      /** @type {Array<import(\"../../Feature.js\").default>} */\n      var features = [];\n      vectorSource.forEachFeatureInExtent(extent,\n        /**\n         * @param {import(\"../../Feature.js\").default} feature Feature.\n         */\n        function(feature) {\n          features.push(feature);\n        });\n      features.sort(vectorLayerRenderOrder);\n      features.forEach(render.bind(this));\n    } else {\n      vectorSource.forEachFeatureInExtent(extent, render);\n    }\n    replayGroup.finish(context);\n\n    this.renderedResolution_ = resolution;\n    this.renderedRevision_ = vectorLayerRevision;\n    this.renderedRenderOrder_ = vectorLayerRenderOrder;\n    this.renderedExtent_ = extent;\n    this.replayGroup_ = replayGroup;\n\n    return true;\n  };\n\n  /**\n   * @param {import(\"../../Feature.js\").default} feature Feature.\n   * @param {number} resolution Resolution.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../../style/Style.js\").default|Array<import(\"../../style/Style.js\").default>} styles The style or array of\n   *     styles.\n   * @param {import(\"../../render/webgl/ReplayGroup.js\").default} replayGroup Replay group.\n   * @return {boolean} `true` if an image is loading.\n   */\n  WebGLVectorLayerRenderer.prototype.renderFeature = function renderFeature$1 (feature, resolution, pixelRatio, styles, replayGroup) {\n    if (!styles) {\n      return false;\n    }\n    var loading = false;\n    if (Array.isArray(styles)) {\n      for (var i = styles.length - 1, ii = 0; i >= ii; --i) {\n        loading = renderFeature(\n          replayGroup, feature, styles[i],\n          getSquaredRenderTolerance(resolution, pixelRatio),\n          this.handleStyleImageChange_, this) || loading;\n      }\n    } else {\n      loading = renderFeature(\n        replayGroup, feature, styles,\n        getSquaredRenderTolerance(resolution, pixelRatio),\n        this.handleStyleImageChange_, this) || loading;\n    }\n    return loading;\n  };\n\n  return WebGLVectorLayerRenderer;\n}(WebGLLayerRenderer));\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {import(\"../../layer/Layer.js\").default} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nWebGLVectorLayerRenderer['handles'] = function(layer) {\n  return layer.getType() === LayerType.VECTOR;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {import(\"../Map.js\").default} mapRenderer The map renderer.\n * @param {import(\"../../layer/Layer.js\").default} layer The layer to be rendererd.\n * @return {WebGLVectorLayerRenderer} The layer renderer.\n */\nWebGLVectorLayerRenderer['create'] = function(mapRenderer, layer) {\n  return new WebGLVectorLayerRenderer(\n    /** @type {import(\"./Map.js\").default} */ (mapRenderer),\n    /** @type {import(\"../../layer/Vector.js\").default} */ (layer)\n  );\n};\n\n\nexport default WebGLVectorLayerRenderer;\n\n//# sourceMappingURL=VectorLayer.js.map","/**\n * @module ol/WebGLMap\n */\nimport PluggableMap from './PluggableMap.js';\nimport {defaults as defaultControls} from './control.js';\nimport {defaults as defaultInteractions} from './interaction.js';\nimport {assign} from './obj.js';\nimport WebGLImageLayerRenderer from './renderer/webgl/ImageLayer.js';\nimport WebGLMapRenderer from './renderer/webgl/Map.js';\nimport WebGLTileLayerRenderer from './renderer/webgl/TileLayer.js';\nimport WebGLVectorLayerRenderer from './renderer/webgl/VectorLayer.js';\n\n\n/**\n * @classdesc\n * The WebGLMap uses WebGL for rendering map layers.  This renderer has limited\n * support for vector data and no support for vector tiles.\n *\n *     import WebGLMap from 'ol/WebGLMap';\n *     import TileLayer from 'ol/layer/Tile';\n *     import OSM from 'ol/source/OSM';\n *     import View from 'ol/View';\n *\n *     var map = new WebGLMap({\n *       view: new View({\n *         center: [0, 0],\n *         zoom: 1\n *       }),\n *       layers: [\n *         new TileLayer({\n *           source: new OSM()\n *         })\n *       ],\n *       target: 'map'\n *     });\n *\n * The above snippet creates a map using a {@link module:ol/layer/Tile~Tile} to\n * display {@link module:ol/source/OSM~OSM} OSM data and render it to a DOM\n * element with the id `map`.\n *\n * The constructor places a viewport container (with CSS class name\n * `ol-viewport`) in the target element (see `getViewport()`), and then two\n * further elements within the viewport: one with CSS class name\n * `ol-overlaycontainer-stopevent` for controls and some overlays, and one with\n * CSS class name `ol-overlaycontainer` for other overlays (see the `stopEvent`\n * option of {@link module:ol/Overlay~Overlay} for the difference). The map\n * itself is placed in a further element within the viewport.\n *\n * Layers are stored as a {@link module:ol/Collection~Collection} in\n * layerGroups. A top-level group is provided by the library. This is what is\n * accessed by `getLayerGroup` and `setLayerGroup`. Layers entered in the\n * options are added to this group, and `addLayer` and `removeLayer` change the\n * layer collection in the group. `getLayers` is a convenience function for\n * `getLayerGroup().getLayers()`.\n * Note that {@link module:ol/layer/Group~Group} is a subclass of\n * {@link module:ol/layer/Base}, so layers entered in the options or added\n * with `addLayer` can be groups, which can contain further groups, and so on.\n *\n * @fires import(\"./MapBrowserEvent.js\").MapBrowserEvent\n * @fires import(\"./MapEvent.js\").MapEvent\n * @fires module:ol/render/Event~RenderEvent#postcompose\n * @fires module:ol/render/Event~RenderEvent#precompose\n * @api\n */\nvar WebGLMap = /*@__PURE__*/(function (PluggableMap) {\n  function WebGLMap(options) {\n    options = assign({}, options);\n    if (!options.controls) {\n      options.controls = defaultControls();\n    }\n    if (!options.interactions) {\n      options.interactions = defaultInteractions();\n    }\n\n    PluggableMap.call(this, options);\n  }\n\n  if ( PluggableMap ) WebGLMap.__proto__ = PluggableMap;\n  WebGLMap.prototype = Object.create( PluggableMap && PluggableMap.prototype );\n  WebGLMap.prototype.constructor = WebGLMap;\n\n  WebGLMap.prototype.createRenderer = function createRenderer () {\n    var renderer = new WebGLMapRenderer(this);\n    renderer.registerLayerRenderers([\n      WebGLImageLayerRenderer,\n      WebGLTileLayerRenderer,\n      WebGLVectorLayerRenderer\n    ]);\n    return renderer;\n  };\n\n  return WebGLMap;\n}(PluggableMap));\n\n\nexport default WebGLMap;\n\n//# sourceMappingURL=WebGLMap.js.map","/**\n * @module ol/control/ScaleLine\n */\nimport {getChangeEventType} from '../Object.js';\nimport {assert} from '../asserts.js';\nimport Control from './Control.js';\nimport {CLASS_UNSELECTABLE} from '../css.js';\nimport {listen} from '../events.js';\nimport {getPointResolution, METERS_PER_UNIT} from '../proj.js';\nimport ProjUnits from '../proj/Units.js';\n\n\n/**\n * @type {string}\n */\nvar UNITS_PROP = 'units';\n\n/**\n * Units for the scale line. Supported values are `'degrees'`, `'imperial'`,\n * `'nautical'`, `'metric'`, `'us'`.\n * @enum {string}\n */\nexport var Units = {\n  DEGREES: 'degrees',\n  IMPERIAL: 'imperial',\n  NAUTICAL: 'nautical',\n  METRIC: 'metric',\n  US: 'us'\n};\n\n\n/**\n * @const\n * @type {Array<number>}\n */\nvar LEADING_DIGITS = [1, 2, 5];\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-scale-line'] CSS Class name.\n * @property {number} [minWidth=64] Minimum width in pixels.\n * @property {function(import(\"../MapEvent.js\").default)} [render] Function called when the control\n * should be re-rendered. This is called in a `requestAnimationFrame` callback.\n * @property {HTMLElement|string} [target] Specify a target if you want the control\n * to be rendered outside of the map's viewport.\n * @property {Units|string} [units='metric'] Units.\n */\n\n\n/**\n * @classdesc\n * A control displaying rough y-axis distances, calculated for the center of the\n * viewport. For conformal projections (e.g. EPSG:3857, the default view\n * projection in OpenLayers), the scale is valid for all directions.\n * No scale line will be shown when the y-axis distance of a pixel at the\n * viewport center cannot be calculated in the view projection.\n * By default the scale line will show in the bottom left portion of the map,\n * but this can be changed by using the css selector `.ol-scale-line`.\n *\n * @api\n */\nvar ScaleLine = /*@__PURE__*/(function (Control) {\n  function ScaleLine(opt_options) {\n\n    var options = opt_options ? opt_options : {};\n\n    var className = options.className !== undefined ? options.className : 'ol-scale-line';\n\n    Control.call(this, {\n      element: document.createElement('div'),\n      render: options.render || render,\n      target: options.target\n    });\n\n    /**\n     * @private\n     * @type {HTMLElement}\n     */\n    this.innerElement_ = document.createElement('div');\n    this.innerElement_.className = className + '-inner';\n\n    this.element.className = className + ' ' + CLASS_UNSELECTABLE;\n    this.element.appendChild(this.innerElement_);\n\n    /**\n     * @private\n     * @type {?import(\"../View.js\").State}\n     */\n    this.viewState_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.minWidth_ = options.minWidth !== undefined ? options.minWidth : 64;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.renderedVisible_ = false;\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.renderedWidth_ = undefined;\n\n    /**\n     * @private\n     * @type {string}\n     */\n    this.renderedHTML_ = '';\n\n    listen(\n      this, getChangeEventType(UNITS_PROP),\n      this.handleUnitsChanged_, this);\n\n    this.setUnits(/** @type {Units} */ (options.units) || Units.METRIC);\n\n  }\n\n  if ( Control ) ScaleLine.__proto__ = Control;\n  ScaleLine.prototype = Object.create( Control && Control.prototype );\n  ScaleLine.prototype.constructor = ScaleLine;\n\n  /**\n   * Return the units to use in the scale line.\n   * @return {Units} The units\n   * to use in the scale line.\n   * @observable\n   * @api\n   */\n  ScaleLine.prototype.getUnits = function getUnits () {\n    return this.get(UNITS_PROP);\n  };\n\n  /**\n   * @private\n   */\n  ScaleLine.prototype.handleUnitsChanged_ = function handleUnitsChanged_ () {\n    this.updateElement_();\n  };\n\n  /**\n   * Set the units to use in the scale line.\n   * @param {Units} units The units to use in the scale line.\n   * @observable\n   * @api\n   */\n  ScaleLine.prototype.setUnits = function setUnits (units) {\n    this.set(UNITS_PROP, units);\n  };\n\n  /**\n   * @private\n   */\n  ScaleLine.prototype.updateElement_ = function updateElement_ () {\n    var viewState = this.viewState_;\n\n    if (!viewState) {\n      if (this.renderedVisible_) {\n        this.element.style.display = 'none';\n        this.renderedVisible_ = false;\n      }\n      return;\n    }\n\n    var center = viewState.center;\n    var projection = viewState.projection;\n    var units = this.getUnits();\n    var pointResolutionUnits = units == Units.DEGREES ?\n      ProjUnits.DEGREES :\n      ProjUnits.METERS;\n    var pointResolution =\n        getPointResolution(projection, viewState.resolution, center, pointResolutionUnits);\n    if (projection.getUnits() != ProjUnits.DEGREES && projection.getMetersPerUnit()\n      && pointResolutionUnits == ProjUnits.METERS) {\n      pointResolution *= projection.getMetersPerUnit();\n    }\n\n    var nominalCount = this.minWidth_ * pointResolution;\n    var suffix = '';\n    if (units == Units.DEGREES) {\n      var metersPerDegree = METERS_PER_UNIT[ProjUnits.DEGREES];\n      if (projection.getUnits() == ProjUnits.DEGREES) {\n        nominalCount *= metersPerDegree;\n      } else {\n        pointResolution /= metersPerDegree;\n      }\n      if (nominalCount < metersPerDegree / 60) {\n        suffix = '\\u2033'; // seconds\n        pointResolution *= 3600;\n      } else if (nominalCount < metersPerDegree) {\n        suffix = '\\u2032'; // minutes\n        pointResolution *= 60;\n      } else {\n        suffix = '\\u00b0'; // degrees\n      }\n    } else if (units == Units.IMPERIAL) {\n      if (nominalCount < 0.9144) {\n        suffix = 'in';\n        pointResolution /= 0.0254;\n      } else if (nominalCount < 1609.344) {\n        suffix = 'ft';\n        pointResolution /= 0.3048;\n      } else {\n        suffix = 'mi';\n        pointResolution /= 1609.344;\n      }\n    } else if (units == Units.NAUTICAL) {\n      pointResolution /= 1852;\n      suffix = 'nm';\n    } else if (units == Units.METRIC) {\n      if (nominalCount < 0.001) {\n        suffix = 'μm';\n        pointResolution *= 1000000;\n      } else if (nominalCount < 1) {\n        suffix = 'mm';\n        pointResolution *= 1000;\n      } else if (nominalCount < 1000) {\n        suffix = 'm';\n      } else {\n        suffix = 'km';\n        pointResolution /= 1000;\n      }\n    } else if (units == Units.US) {\n      if (nominalCount < 0.9144) {\n        suffix = 'in';\n        pointResolution *= 39.37;\n      } else if (nominalCount < 1609.344) {\n        suffix = 'ft';\n        pointResolution /= 0.30480061;\n      } else {\n        suffix = 'mi';\n        pointResolution /= 1609.3472;\n      }\n    } else {\n      assert(false, 33); // Invalid units\n    }\n\n    var i = 3 * Math.floor(\n      Math.log(this.minWidth_ * pointResolution) / Math.log(10));\n    var count, width;\n    while (true) {\n      count = LEADING_DIGITS[((i % 3) + 3) % 3] *\n          Math.pow(10, Math.floor(i / 3));\n      width = Math.round(count / pointResolution);\n      if (isNaN(width)) {\n        this.element.style.display = 'none';\n        this.renderedVisible_ = false;\n        return;\n      } else if (width >= this.minWidth_) {\n        break;\n      }\n      ++i;\n    }\n\n    var html = count + ' ' + suffix;\n    if (this.renderedHTML_ != html) {\n      this.innerElement_.innerHTML = html;\n      this.renderedHTML_ = html;\n    }\n\n    if (this.renderedWidth_ != width) {\n      this.innerElement_.style.width = width + 'px';\n      this.renderedWidth_ = width;\n    }\n\n    if (!this.renderedVisible_) {\n      this.element.style.display = '';\n      this.renderedVisible_ = true;\n    }\n\n  };\n\n  return ScaleLine;\n}(Control));\n\n\n/**\n * Update the scale line element.\n * @param {import(\"../MapEvent.js\").default} mapEvent Map event.\n * @this {ScaleLine}\n * @api\n */\nexport function render(mapEvent) {\n  var frameState = mapEvent.frameState;\n  if (!frameState) {\n    this.viewState_ = null;\n  } else {\n    this.viewState_ = frameState.viewState;\n  }\n  this.updateElement_();\n}\n\n\nexport default ScaleLine;\n\n//# sourceMappingURL=ScaleLine.js.map","/**\n * @module ol/format/FormatType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  ARRAY_BUFFER: 'arraybuffer',\n  JSON: 'json',\n  TEXT: 'text',\n  XML: 'xml'\n};\n\n//# sourceMappingURL=FormatType.js.map","/**\n * @module ol/featureloader\n */\nimport {VOID} from './functions.js';\nimport FormatType from './format/FormatType.js';\n\n/**\n * {@link module:ol/source/Vector} sources use a function of this type to\n * load features.\n *\n * This function takes an {@link module:ol/extent~Extent} representing the area to be loaded,\n * a `{number}` representing the resolution (map units per pixel) and an\n * {@link module:ol/proj/Projection} for the projection  as\n * arguments. `this` within the function is bound to the\n * {@link module:ol/source/Vector} it's called from.\n *\n * The function is responsible for loading the features and adding them to the\n * source.\n * @typedef {function(this:(import(\"./source/Vector\").default|import(\"./VectorTile.js\").default), import(\"./extent.js\").Extent, number,\n *                    import(\"./proj/Projection.js\").default)} FeatureLoader\n * @api\n */\n\n\n/**\n * {@link module:ol/source/Vector} sources use a function of this type to\n * get the url to load features from.\n *\n * This function takes an {@link module:ol/extent~Extent} representing the area\n * to be loaded, a `{number}` representing the resolution (map units per pixel)\n * and an {@link module:ol/proj/Projection} for the projection  as\n * arguments and returns a `{string}` representing the URL.\n * @typedef {function(import(\"./extent.js\").Extent, number, import(\"./proj/Projection.js\").default): string} FeatureUrlFunction\n * @api\n */\n\n\n/**\n * @param {string|FeatureUrlFunction} url Feature URL service.\n * @param {import(\"./format/Feature.js\").default} format Feature format.\n * @param {function(this:import(\"./VectorTile.js\").default, Array<import(\"./Feature.js\").default>, import(\"./proj/Projection.js\").default, import(\"./extent.js\").Extent)|function(this:import(\"./source/Vector\").default, Array<import(\"./Feature.js\").default>)} success\n *     Function called with the loaded features and optionally with the data\n *     projection. Called with the vector tile or source as `this`.\n * @param {function(this:import(\"./VectorTile.js\").default)|function(this:import(\"./source/Vector\").default)} failure\n *     Function called when loading failed. Called with the vector tile or\n *     source as `this`.\n * @return {FeatureLoader} The feature loader.\n */\nexport function loadFeaturesXhr(url, format, success, failure) {\n  return (\n    /**\n     * @param {import(\"./extent.js\").Extent} extent Extent.\n     * @param {number} resolution Resolution.\n     * @param {import(\"./proj/Projection.js\").default} projection Projection.\n     * @this {import(\"./source/Vector\").default|import(\"./VectorTile.js\").default}\n     */\n    function(extent, resolution, projection) {\n      var xhr = new XMLHttpRequest();\n      xhr.open('GET',\n        typeof url === 'function' ? url(extent, resolution, projection) : url,\n        true);\n      if (format.getType() == FormatType.ARRAY_BUFFER) {\n        xhr.responseType = 'arraybuffer';\n      }\n      /**\n       * @param {Event} event Event.\n       * @private\n       */\n      xhr.onload = function(event) {\n        // status will be 0 for file:// urls\n        if (!xhr.status || xhr.status >= 200 && xhr.status < 300) {\n          var type = format.getType();\n          /** @type {Document|Node|Object|string|undefined} */\n          var source;\n          if (type == FormatType.JSON || type == FormatType.TEXT) {\n            source = xhr.responseText;\n          } else if (type == FormatType.XML) {\n            source = xhr.responseXML;\n            if (!source) {\n              source = new DOMParser().parseFromString(xhr.responseText, 'application/xml');\n            }\n          } else if (type == FormatType.ARRAY_BUFFER) {\n            source = /** @type {ArrayBuffer} */ (xhr.response);\n          }\n          if (source) {\n            success.call(this, format.readFeatures(source,\n              {featureProjection: projection}),\n            format.readProjection(source), format.getLastExtent());\n          } else {\n            failure.call(this);\n          }\n        } else {\n          failure.call(this);\n        }\n      }.bind(this);\n      /**\n       * @private\n       */\n      xhr.onerror = function() {\n        failure.call(this);\n      }.bind(this);\n      xhr.send();\n    }\n  );\n}\n\n\n/**\n * Create an XHR feature loader for a `url` and `format`. The feature loader\n * loads features (with XHR), parses the features, and adds them to the\n * vector source.\n * @param {string|FeatureUrlFunction} url Feature URL service.\n * @param {import(\"./format/Feature.js\").default} format Feature format.\n * @return {FeatureLoader} The feature loader.\n * @api\n */\nexport function xhr(url, format) {\n  return loadFeaturesXhr(url, format,\n    /**\n     * @param {Array<import(\"./Feature.js\").default>} features The loaded features.\n     * @param {import(\"./proj/Projection.js\").default} dataProjection Data\n     * projection.\n     * @this {import(\"./source/Vector\").default|import(\"./VectorTile.js\").default}\n     */\n    function(features, dataProjection) {\n      var sourceOrTile = /** @type {?} */ (this);\n      if (typeof sourceOrTile.addFeatures === 'function') {\n        /** @type {import(\"./source/Vector\").default} */ (sourceOrTile).addFeatures(features);\n      }\n    }, /* FIXME handle error */ VOID);\n}\n\n//# sourceMappingURL=featureloader.js.map","/**\n * @module ol/loadingstrategy\n */\n\n\n/**\n * Strategy function for loading all features with a single request.\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @return {Array<import(\"./extent.js\").Extent>} Extents.\n * @api\n */\nexport function all(extent, resolution) {\n  return [[-Infinity, -Infinity, Infinity, Infinity]];\n}\n\n\n/**\n * Strategy function for loading features based on the view's extent and\n * resolution.\n * @param {import(\"./extent.js\").Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @return {Array<import(\"./extent.js\").Extent>} Extents.\n * @api\n */\nexport function bbox(extent, resolution) {\n  return [extent];\n}\n\n\n/**\n * Creates a strategy function for loading features based on a tile grid.\n * @param {import(\"./tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n * @return {function(import(\"./extent.js\").Extent, number): Array<import(\"./extent.js\").Extent>} Loading strategy.\n * @api\n */\nexport function tile(tileGrid) {\n  return (\n    /**\n     * @param {import(\"./extent.js\").Extent} extent Extent.\n     * @param {number} resolution Resolution.\n     * @return {Array<import(\"./extent.js\").Extent>} Extents.\n     */\n    function(extent, resolution) {\n      var z = tileGrid.getZForResolution(resolution);\n      var tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z);\n      /** @type {Array<import(\"./extent.js\").Extent>} */\n      var extents = [];\n      /** @type {import(\"./tilecoord.js\").TileCoord} */\n      var tileCoord = [z, 0, 0];\n      for (tileCoord[1] = tileRange.minX; tileCoord[1] <= tileRange.maxX; ++tileCoord[1]) {\n        for (tileCoord[2] = tileRange.minY; tileCoord[2] <= tileRange.maxY; ++tileCoord[2]) {\n          extents.push(tileGrid.getTileCoordExtent(tileCoord));\n        }\n      }\n      return extents;\n    }\n  );\n}\n\n//# sourceMappingURL=loadingstrategy.js.map","/**\n * @module ol/source/VectorEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  /**\n   * Triggered when a feature is added to the source.\n   * @event ol/source/Vector.VectorSourceEvent#addfeature\n   * @api\n   */\n  ADDFEATURE: 'addfeature',\n\n  /**\n   * Triggered when a feature is updated.\n   * @event ol/source/Vector.VectorSourceEvent#changefeature\n   * @api\n   */\n  CHANGEFEATURE: 'changefeature',\n\n  /**\n   * Triggered when the clear method is called on the source.\n   * @event ol/source/Vector.VectorSourceEvent#clear\n   * @api\n   */\n  CLEAR: 'clear',\n\n  /**\n   * Triggered when a feature is removed from the source.\n   * See {@link module:ol/source/Vector#clear source.clear()} for exceptions.\n   * @event ol/source/Vector.VectorSourceEvent#removefeature\n   * @api\n   */\n  REMOVEFEATURE: 'removefeature'\n};\n\n//# sourceMappingURL=VectorEventType.js.map","/**\n * @module ol/source/Vector\n */\n\nimport {getUid} from '../util.js';\nimport Collection from '../Collection.js';\nimport CollectionEventType from '../CollectionEventType.js';\nimport ObjectEventType from '../ObjectEventType.js';\nimport {extend} from '../array.js';\nimport {assert} from '../asserts.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport Event from '../events/Event.js';\nimport EventType from '../events/EventType.js';\nimport {containsExtent, equals} from '../extent.js';\nimport {xhr} from '../featureloader.js';\nimport {TRUE, VOID} from '../functions.js';\nimport {all as allStrategy} from '../loadingstrategy.js';\nimport {isEmpty, getValues} from '../obj.js';\nimport Source from './Source.js';\nimport SourceState from './State.js';\nimport VectorEventType from './VectorEventType.js';\nimport RBush from '../structs/RBush.js';\n\n/**\n * A function that takes an {@link module:ol/extent~Extent} and a resolution as arguments, and\n * returns an array of {@link module:ol/extent~Extent} with the extents to load. Usually this\n * is one of the standard {@link module:ol/loadingstrategy} strategies.\n *\n * @typedef {function(import(\"../extent.js\").Extent, number): Array<import(\"../extent.js\").Extent>} LoadingStrategy\n * @api\n */\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/source/Vector} instances are instances of this\n * type.\n */\nexport var VectorSourceEvent = /*@__PURE__*/(function (Event) {\n  function VectorSourceEvent(type, opt_feature) {\n\n    Event.call(this, type);\n\n    /**\n     * The feature being added or removed.\n     * @type {import(\"../Feature.js\").default|undefined}\n     * @api\n     */\n    this.feature = opt_feature;\n\n  }\n\n  if ( Event ) VectorSourceEvent.__proto__ = Event;\n  VectorSourceEvent.prototype = Object.create( Event && Event.prototype );\n  VectorSourceEvent.prototype.constructor = VectorSourceEvent;\n\n  return VectorSourceEvent;\n}(Event));\n\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {Array<import(\"../Feature.js\").default>|Collection<import(\"../Feature.js\").default>} [features]\n * Features. If provided as {@link module:ol/Collection}, the features in the source\n * and the collection will stay in sync.\n * @property {import(\"../format/Feature.js\").default} [format] The feature format used by the XHR\n * feature loader when `url` is set. Required if `url` is set, otherwise ignored.\n * @property {import(\"../featureloader.js\").FeatureLoader} [loader]\n * The loader function used to load features, from a remote source for example.\n * If this is not set and `url` is set, the source will create and use an XHR\n * feature loader.\n *\n * Example:\n *\n * ```js\n * import {Vector} from 'ol/source';\n * import {GeoJSON} from 'ol/format';\n * import {bbox} from 'ol/loadingstrategy';\n *\n * var vectorSource = new Vector({\n *   format: new GeoJSON(),\n *   loader: function(extent, resolution, projection) {\n *      var proj = projection.getCode();\n *      var url = 'https://ahocevar.com/geoserver/wfs?service=WFS&' +\n *          'version=1.1.0&request=GetFeature&typename=osm:water_areas&' +\n *          'outputFormat=application/json&srsname=' + proj + '&' +\n *          'bbox=' + extent.join(',') + ',' + proj;\n *      var xhr = new XMLHttpRequest();\n *      xhr.open('GET', url);\n *      var onError = function() {\n *        vectorSource.removeLoadedExtent(extent);\n *      }\n *      xhr.onerror = onError;\n *      xhr.onload = function() {\n *        if (xhr.status == 200) {\n *          vectorSource.addFeatures(\n *              vectorSource.getFormat().readFeatures(xhr.responseText));\n *        } else {\n *          onError();\n *        }\n *      }\n *      xhr.send();\n *    },\n *    strategy: bbox\n *  });\n * ```\n * @property {boolean} [overlaps=true] This source may have overlapping geometries.\n * Setting this to `false` (e.g. for sources with polygons that represent administrative\n * boundaries or TopoJSON sources) allows the renderer to optimise fill and\n * stroke operations.\n * @property {LoadingStrategy} [strategy] The loading strategy to use.\n * By default an {@link module:ol/loadingstrategy~all}\n * strategy is used, a one-off strategy which loads all features at once.\n * @property {string|import(\"../featureloader.js\").FeatureUrlFunction} [url]\n * Setting this option instructs the source to load features using an XHR loader\n * (see {@link module:ol/featureloader~xhr}). Use a `string` and an\n * {@link module:ol/loadingstrategy~all} for a one-off download of all features from\n * the given URL. Use a {@link module:ol/featureloader~FeatureUrlFunction} to generate the url with\n * other loading strategies.\n * Requires `format` to be set as well.\n * When default XHR feature loader is provided, the features will\n * be transformed from the data projection to the view projection\n * during parsing. If your remote data source does not advertise its projection\n * properly, this transformation will be incorrect. For some formats, the\n * default projection (usually EPSG:4326) can be overridden by setting the\n * dataProjection constructor option on the format.\n * Note that if a source contains non-feature data, such as a GeoJSON geometry\n * or a KML NetworkLink, these will be ignored. Use a custom loader to load these.\n * @property {boolean} [useSpatialIndex=true]\n * By default, an RTree is used as spatial index. When features are removed and\n * added frequently, and the total number of features is low, setting this to\n * `false` may improve performance.\n *\n * Note that\n * {@link module:ol/source/Vector~VectorSource#getFeaturesInExtent},\n * {@link module:ol/source/Vector~VectorSource#getClosestFeatureToCoordinate} and\n * {@link module:ol/source/Vector~VectorSource#getExtent} cannot be used when `useSpatialIndex` is\n * set to `false`, and {@link module:ol/source/Vector~VectorSource#forEachFeatureInExtent} will loop\n * through all features.\n *\n * When set to `false`, the features will be maintained in an\n * {@link module:ol/Collection}, which can be retrieved through\n * {@link module:ol/source/Vector~VectorSource#getFeaturesCollection}.\n * @property {boolean} [wrapX=true] Wrap the world horizontally. For vector editing across the\n * -180° and 180° meridians to work properly, this should be set to `false`. The\n * resulting geometry coordinates will then exceed the world bounds.\n */\n\n\n/**\n * @classdesc\n * Provides a source of features for vector layers. Vector features provided\n * by this source are suitable for editing. See {@link module:ol/source/VectorTile~VectorTile} for\n * vector data that is optimized for rendering.\n *\n * @fires ol/source/Vector.VectorSourceEvent\n * @api\n */\nvar VectorSource = /*@__PURE__*/(function (Source) {\n  function VectorSource(opt_options) {\n\n    var options = opt_options || {};\n\n    Source.call(this, {\n      attributions: options.attributions,\n      projection: undefined,\n      state: SourceState.READY,\n      wrapX: options.wrapX !== undefined ? options.wrapX : true\n    });\n\n    /**\n     * @private\n     * @type {import(\"../featureloader.js\").FeatureLoader}\n     */\n    this.loader_ = VOID;\n\n    /**\n     * @private\n     * @type {import(\"../format/Feature.js\").default|undefined}\n     */\n    this.format_ = options.format;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.overlaps_ = options.overlaps == undefined ? true : options.overlaps;\n\n    /**\n     * @private\n     * @type {string|import(\"../featureloader.js\").FeatureUrlFunction|undefined}\n     */\n    this.url_ = options.url;\n\n    if (options.loader !== undefined) {\n      this.loader_ = options.loader;\n    } else if (this.url_ !== undefined) {\n      assert(this.format_, 7); // `format` must be set when `url` is set\n      // create a XHR feature loader for \"url\" and \"format\"\n      this.loader_ = xhr(this.url_, /** @type {import(\"../format/Feature.js\").default} */ (this.format_));\n    }\n\n    /**\n     * @private\n     * @type {LoadingStrategy}\n     */\n    this.strategy_ = options.strategy !== undefined ? options.strategy : allStrategy;\n\n    var useSpatialIndex =\n        options.useSpatialIndex !== undefined ? options.useSpatialIndex : true;\n\n    /**\n     * @private\n     * @type {RBush<import(\"../Feature.js\").default>}\n     */\n    this.featuresRtree_ = useSpatialIndex ? new RBush() : null;\n\n    /**\n     * @private\n     * @type {RBush<{extent: import(\"../extent.js\").Extent}>}\n     */\n    this.loadedExtentsRtree_ = new RBush();\n\n    /**\n     * @private\n     * @type {!Object<string, import(\"../Feature.js\").default>}\n     */\n    this.nullGeometryFeatures_ = {};\n\n    /**\n     * A lookup of features by id (the return from feature.getId()).\n     * @private\n     * @type {!Object<string, import(\"../Feature.js\").default>}\n     */\n    this.idIndex_ = {};\n\n    /**\n     * A lookup of features without id (keyed by getUid(feature)).\n     * @private\n     * @type {!Object<string, import(\"../Feature.js\").default>}\n     */\n    this.undefIdIndex_ = {};\n\n    /**\n     * @private\n     * @type {Object<string, Array<import(\"../events.js\").EventsKey>>}\n     */\n    this.featureChangeKeys_ = {};\n\n    /**\n     * @private\n     * @type {Collection<import(\"../Feature.js\").default>}\n     */\n    this.featuresCollection_ = null;\n\n    var collection, features;\n    if (Array.isArray(options.features)) {\n      features = options.features;\n    } else if (options.features) {\n      collection = options.features;\n      features = collection.getArray();\n    }\n    if (!useSpatialIndex && collection === undefined) {\n      collection = new Collection(features);\n    }\n    if (features !== undefined) {\n      this.addFeaturesInternal(features);\n    }\n    if (collection !== undefined) {\n      this.bindFeaturesCollection_(collection);\n    }\n\n  }\n\n  if ( Source ) VectorSource.__proto__ = Source;\n  VectorSource.prototype = Object.create( Source && Source.prototype );\n  VectorSource.prototype.constructor = VectorSource;\n\n  /**\n   * Add a single feature to the source.  If you want to add a batch of features\n   * at once, call {@link module:ol/source/Vector~VectorSource#addFeatures #addFeatures()}\n   * instead. A feature will not be added to the source if feature with\n   * the same id is already there. The reason for this behavior is to avoid\n   * feature duplication when using bbox or tile loading strategies.\n   * @param {import(\"../Feature.js\").default} feature Feature to add.\n   * @api\n   */\n  VectorSource.prototype.addFeature = function addFeature (feature) {\n    this.addFeatureInternal(feature);\n    this.changed();\n  };\n\n\n  /**\n   * Add a feature without firing a `change` event.\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @protected\n   */\n  VectorSource.prototype.addFeatureInternal = function addFeatureInternal (feature) {\n    var featureKey = getUid(feature);\n\n    if (!this.addToIndex_(featureKey, feature)) {\n      return;\n    }\n\n    this.setupChangeEvents_(featureKey, feature);\n\n    var geometry = feature.getGeometry();\n    if (geometry) {\n      var extent = geometry.getExtent();\n      if (this.featuresRtree_) {\n        this.featuresRtree_.insert(extent, feature);\n      }\n    } else {\n      this.nullGeometryFeatures_[featureKey] = feature;\n    }\n\n    this.dispatchEvent(\n      new VectorSourceEvent(VectorEventType.ADDFEATURE, feature));\n  };\n\n\n  /**\n   * @param {string} featureKey Unique identifier for the feature.\n   * @param {import(\"../Feature.js\").default} feature The feature.\n   * @private\n   */\n  VectorSource.prototype.setupChangeEvents_ = function setupChangeEvents_ (featureKey, feature) {\n    this.featureChangeKeys_[featureKey] = [\n      listen(feature, EventType.CHANGE,\n        this.handleFeatureChange_, this),\n      listen(feature, ObjectEventType.PROPERTYCHANGE,\n        this.handleFeatureChange_, this)\n    ];\n  };\n\n\n  /**\n   * @param {string} featureKey Unique identifier for the feature.\n   * @param {import(\"../Feature.js\").default} feature The feature.\n   * @return {boolean} The feature is \"valid\", in the sense that it is also a\n   *     candidate for insertion into the Rtree.\n   * @private\n   */\n  VectorSource.prototype.addToIndex_ = function addToIndex_ (featureKey, feature) {\n    var valid = true;\n    var id = feature.getId();\n    if (id !== undefined) {\n      if (!(id.toString() in this.idIndex_)) {\n        this.idIndex_[id.toString()] = feature;\n      } else {\n        valid = false;\n      }\n    } else {\n      assert(!(featureKey in this.undefIdIndex_),\n        30); // The passed `feature` was already added to the source\n      this.undefIdIndex_[featureKey] = feature;\n    }\n    return valid;\n  };\n\n\n  /**\n   * Add a batch of features to the source.\n   * @param {Array<import(\"../Feature.js\").default>} features Features to add.\n   * @api\n   */\n  VectorSource.prototype.addFeatures = function addFeatures (features) {\n    this.addFeaturesInternal(features);\n    this.changed();\n  };\n\n\n  /**\n   * Add features without firing a `change` event.\n   * @param {Array<import(\"../Feature.js\").default>} features Features.\n   * @protected\n   */\n  VectorSource.prototype.addFeaturesInternal = function addFeaturesInternal (features) {\n    var extents = [];\n    var newFeatures = [];\n    var geometryFeatures = [];\n\n    for (var i = 0, length = features.length; i < length; i++) {\n      var feature = features[i];\n      var featureKey = getUid(feature);\n      if (this.addToIndex_(featureKey, feature)) {\n        newFeatures.push(feature);\n      }\n    }\n\n    for (var i$1 = 0, length$1 = newFeatures.length; i$1 < length$1; i$1++) {\n      var feature$1 = newFeatures[i$1];\n      var featureKey$1 = getUid(feature$1);\n      this.setupChangeEvents_(featureKey$1, feature$1);\n\n      var geometry = feature$1.getGeometry();\n      if (geometry) {\n        var extent = geometry.getExtent();\n        extents.push(extent);\n        geometryFeatures.push(feature$1);\n      } else {\n        this.nullGeometryFeatures_[featureKey$1] = feature$1;\n      }\n    }\n    if (this.featuresRtree_) {\n      this.featuresRtree_.load(extents, geometryFeatures);\n    }\n\n    for (var i$2 = 0, length$2 = newFeatures.length; i$2 < length$2; i$2++) {\n      this.dispatchEvent(new VectorSourceEvent(VectorEventType.ADDFEATURE, newFeatures[i$2]));\n    }\n  };\n\n\n  /**\n   * @param {!Collection<import(\"../Feature.js\").default>} collection Collection.\n   * @private\n   */\n  VectorSource.prototype.bindFeaturesCollection_ = function bindFeaturesCollection_ (collection) {\n    var modifyingCollection = false;\n    listen(this, VectorEventType.ADDFEATURE,\n      /**\n       * @param {VectorSourceEvent} evt The vector source event\n       */\n      function(evt) {\n        if (!modifyingCollection) {\n          modifyingCollection = true;\n          collection.push(evt.feature);\n          modifyingCollection = false;\n        }\n      });\n    listen(this, VectorEventType.REMOVEFEATURE,\n      /**\n       * @param {VectorSourceEvent} evt The vector source event\n       */\n      function(evt) {\n        if (!modifyingCollection) {\n          modifyingCollection = true;\n          collection.remove(evt.feature);\n          modifyingCollection = false;\n        }\n      });\n    listen(collection, CollectionEventType.ADD,\n      /**\n       * @param {import(\"../Collection.js\").CollectionEvent} evt The collection event\n       */\n      function(evt) {\n        if (!modifyingCollection) {\n          modifyingCollection = true;\n          this.addFeature(/** @type {import(\"../Feature.js\").default} */ (evt.element));\n          modifyingCollection = false;\n        }\n      }, this);\n    listen(collection, CollectionEventType.REMOVE,\n      /**\n       * @param {import(\"../Collection.js\").CollectionEvent} evt The collection event\n       */\n      function(evt) {\n        if (!modifyingCollection) {\n          modifyingCollection = true;\n          this.removeFeature(/** @type {import(\"../Feature.js\").default} */ (evt.element));\n          modifyingCollection = false;\n        }\n      }, this);\n    this.featuresCollection_ = collection;\n  };\n\n\n  /**\n   * Remove all features from the source.\n   * @param {boolean=} opt_fast Skip dispatching of {@link module:ol/source/Vector.VectorSourceEvent#removefeature} events.\n   * @api\n   */\n  VectorSource.prototype.clear = function clear (opt_fast) {\n    if (opt_fast) {\n      for (var featureId in this.featureChangeKeys_) {\n        var keys = this.featureChangeKeys_[featureId];\n        keys.forEach(unlistenByKey);\n      }\n      if (!this.featuresCollection_) {\n        this.featureChangeKeys_ = {};\n        this.idIndex_ = {};\n        this.undefIdIndex_ = {};\n      }\n    } else {\n      if (this.featuresRtree_) {\n        this.featuresRtree_.forEach(this.removeFeatureInternal, this);\n        for (var id in this.nullGeometryFeatures_) {\n          this.removeFeatureInternal(this.nullGeometryFeatures_[id]);\n        }\n      }\n    }\n    if (this.featuresCollection_) {\n      this.featuresCollection_.clear();\n    }\n\n    if (this.featuresRtree_) {\n      this.featuresRtree_.clear();\n    }\n    this.loadedExtentsRtree_.clear();\n    this.nullGeometryFeatures_ = {};\n\n    var clearEvent = new VectorSourceEvent(VectorEventType.CLEAR);\n    this.dispatchEvent(clearEvent);\n    this.changed();\n  };\n\n\n  /**\n   * Iterate through all features on the source, calling the provided callback\n   * with each one.  If the callback returns any \"truthy\" value, iteration will\n   * stop and the function will return the same value.\n   * Note: this function only iterate through the feature that have a defined geometry.\n   *\n   * @param {function(import(\"../Feature.js\").default): T} callback Called with each feature\n   *     on the source.  Return a truthy value to stop iteration.\n   * @return {T|undefined} The return value from the last call to the callback.\n   * @template T\n   * @api\n   */\n  VectorSource.prototype.forEachFeature = function forEachFeature (callback) {\n    if (this.featuresRtree_) {\n      return this.featuresRtree_.forEach(callback);\n    } else if (this.featuresCollection_) {\n      this.featuresCollection_.forEach(callback);\n    }\n  };\n\n\n  /**\n   * Iterate through all features whose geometries contain the provided\n   * coordinate, calling the callback with each feature.  If the callback returns\n   * a \"truthy\" value, iteration will stop and the function will return the same\n   * value.\n   *\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {function(import(\"../Feature.js\").default): T} callback Called with each feature\n   *     whose goemetry contains the provided coordinate.\n   * @return {T|undefined} The return value from the last call to the callback.\n   * @template T\n   */\n  VectorSource.prototype.forEachFeatureAtCoordinateDirect = function forEachFeatureAtCoordinateDirect (coordinate, callback) {\n    var extent = [coordinate[0], coordinate[1], coordinate[0], coordinate[1]];\n    return this.forEachFeatureInExtent(extent, function(feature) {\n      var geometry = feature.getGeometry();\n      if (geometry.intersectsCoordinate(coordinate)) {\n        return callback(feature);\n      } else {\n        return undefined;\n      }\n    });\n  };\n\n\n  /**\n   * Iterate through all features whose bounding box intersects the provided\n   * extent (note that the feature's geometry may not intersect the extent),\n   * calling the callback with each feature.  If the callback returns a \"truthy\"\n   * value, iteration will stop and the function will return the same value.\n   *\n   * If you are interested in features whose geometry intersects an extent, call\n   * the {@link module:ol/source/Vector~VectorSource#forEachFeatureIntersectingExtent #forEachFeatureIntersectingExtent()} method instead.\n   *\n   * When `useSpatialIndex` is set to false, this method will loop through all\n   * features, equivalent to {@link module:ol/source/Vector~VectorSource#forEachFeature #forEachFeature()}.\n   *\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {function(import(\"../Feature.js\").default): T} callback Called with each feature\n   *     whose bounding box intersects the provided extent.\n   * @return {T|undefined} The return value from the last call to the callback.\n   * @template T\n   * @api\n   */\n  VectorSource.prototype.forEachFeatureInExtent = function forEachFeatureInExtent (extent, callback) {\n    if (this.featuresRtree_) {\n      return this.featuresRtree_.forEachInExtent(extent, callback);\n    } else if (this.featuresCollection_) {\n      this.featuresCollection_.forEach(callback);\n    }\n  };\n\n\n  /**\n   * Iterate through all features whose geometry intersects the provided extent,\n   * calling the callback with each feature.  If the callback returns a \"truthy\"\n   * value, iteration will stop and the function will return the same value.\n   *\n   * If you only want to test for bounding box intersection, call the\n   * {@link module:ol/source/Vector~VectorSource#forEachFeatureInExtent #forEachFeatureInExtent()} method instead.\n   *\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {function(import(\"../Feature.js\").default): T} callback Called with each feature\n   *     whose geometry intersects the provided extent.\n   * @return {T|undefined} The return value from the last call to the callback.\n   * @template T\n   * @api\n   */\n  VectorSource.prototype.forEachFeatureIntersectingExtent = function forEachFeatureIntersectingExtent (extent, callback) {\n    return this.forEachFeatureInExtent(extent,\n      /**\n       * @param {import(\"../Feature.js\").default} feature Feature.\n       * @return {T|undefined} The return value from the last call to the callback.\n       */\n      function(feature) {\n        var geometry = feature.getGeometry();\n        if (geometry.intersectsExtent(extent)) {\n          var result = callback(feature);\n          if (result) {\n            return result;\n          }\n        }\n      });\n  };\n\n\n  /**\n   * Get the features collection associated with this source. Will be `null`\n   * unless the source was configured with `useSpatialIndex` set to `false`, or\n   * with an {@link module:ol/Collection} as `features`.\n   * @return {Collection<import(\"../Feature.js\").default>} The collection of features.\n   * @api\n   */\n  VectorSource.prototype.getFeaturesCollection = function getFeaturesCollection () {\n    return this.featuresCollection_;\n  };\n\n\n  /**\n   * Get all features on the source in random order.\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   * @api\n   */\n  VectorSource.prototype.getFeatures = function getFeatures () {\n    var features;\n    if (this.featuresCollection_) {\n      features = this.featuresCollection_.getArray();\n    } else if (this.featuresRtree_) {\n      features = this.featuresRtree_.getAll();\n      if (!isEmpty(this.nullGeometryFeatures_)) {\n        extend(features, getValues(this.nullGeometryFeatures_));\n      }\n    }\n    return (\n      /** @type {Array<import(\"../Feature.js\").default>} */ (features)\n    );\n  };\n\n\n  /**\n   * Get all features whose geometry intersects the provided coordinate.\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   * @api\n   */\n  VectorSource.prototype.getFeaturesAtCoordinate = function getFeaturesAtCoordinate (coordinate) {\n    var features = [];\n    this.forEachFeatureAtCoordinateDirect(coordinate, function(feature) {\n      features.push(feature);\n    });\n    return features;\n  };\n\n\n  /**\n   * Get all features in the provided extent.  Note that this returns an array of\n   * all features intersecting the given extent in random order (so it may include\n   * features whose geometries do not intersect the extent).\n   *\n   * This method is not available when the source is configured with\n   * `useSpatialIndex` set to `false`.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   * @api\n   */\n  VectorSource.prototype.getFeaturesInExtent = function getFeaturesInExtent (extent) {\n    return this.featuresRtree_.getInExtent(extent);\n  };\n\n\n  /**\n   * Get the closest feature to the provided coordinate.\n   *\n   * This method is not available when the source is configured with\n   * `useSpatialIndex` set to `false`.\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @param {function(import(\"../Feature.js\").default):boolean=} opt_filter Feature filter function.\n   *     The filter function will receive one argument, the {@link module:ol/Feature feature}\n   *     and it should return a boolean value. By default, no filtering is made.\n   * @return {import(\"../Feature.js\").default} Closest feature.\n   * @api\n   */\n  VectorSource.prototype.getClosestFeatureToCoordinate = function getClosestFeatureToCoordinate (coordinate, opt_filter) {\n    // Find the closest feature using branch and bound.  We start searching an\n    // infinite extent, and find the distance from the first feature found.  This\n    // becomes the closest feature.  We then compute a smaller extent which any\n    // closer feature must intersect.  We continue searching with this smaller\n    // extent, trying to find a closer feature.  Every time we find a closer\n    // feature, we update the extent being searched so that any even closer\n    // feature must intersect it.  We continue until we run out of features.\n    var x = coordinate[0];\n    var y = coordinate[1];\n    var closestFeature = null;\n    var closestPoint = [NaN, NaN];\n    var minSquaredDistance = Infinity;\n    var extent = [-Infinity, -Infinity, Infinity, Infinity];\n    var filter = opt_filter ? opt_filter : TRUE;\n    this.featuresRtree_.forEachInExtent(extent,\n      /**\n       * @param {import(\"../Feature.js\").default} feature Feature.\n       */\n      function(feature) {\n        if (filter(feature)) {\n          var geometry = feature.getGeometry();\n          var previousMinSquaredDistance = minSquaredDistance;\n          minSquaredDistance = geometry.closestPointXY(\n            x, y, closestPoint, minSquaredDistance);\n          if (minSquaredDistance < previousMinSquaredDistance) {\n            closestFeature = feature;\n            // This is sneaky.  Reduce the extent that it is currently being\n            // searched while the R-Tree traversal using this same extent object\n            // is still in progress.  This is safe because the new extent is\n            // strictly contained by the old extent.\n            var minDistance = Math.sqrt(minSquaredDistance);\n            extent[0] = x - minDistance;\n            extent[1] = y - minDistance;\n            extent[2] = x + minDistance;\n            extent[3] = y + minDistance;\n          }\n        }\n      });\n    return closestFeature;\n  };\n\n\n  /**\n   * Get the extent of the features currently in the source.\n   *\n   * This method is not available when the source is configured with\n   * `useSpatialIndex` set to `false`.\n   * @param {import(\"../extent.js\").Extent=} opt_extent Destination extent. If provided, no new extent\n   *     will be created. Instead, that extent's coordinates will be overwritten.\n   * @return {import(\"../extent.js\").Extent} Extent.\n   * @api\n   */\n  VectorSource.prototype.getExtent = function getExtent (opt_extent) {\n    return this.featuresRtree_.getExtent(opt_extent);\n  };\n\n\n  /**\n   * Get a feature by its identifier (the value returned by feature.getId()).\n   * Note that the index treats string and numeric identifiers as the same.  So\n   * `source.getFeatureById(2)` will return a feature with id `'2'` or `2`.\n   *\n   * @param {string|number} id Feature identifier.\n   * @return {import(\"../Feature.js\").default} The feature (or `null` if not found).\n   * @api\n   */\n  VectorSource.prototype.getFeatureById = function getFeatureById (id) {\n    var feature = this.idIndex_[id.toString()];\n    return feature !== undefined ? feature : null;\n  };\n\n\n  /**\n   * Get the format associated with this source.\n   *\n   * @return {import(\"../format/Feature.js\").default|undefined} The feature format.\n   * @api\n   */\n  VectorSource.prototype.getFormat = function getFormat () {\n    return this.format_;\n  };\n\n\n  /**\n   * @return {boolean} The source can have overlapping geometries.\n   */\n  VectorSource.prototype.getOverlaps = function getOverlaps () {\n    return this.overlaps_;\n  };\n\n\n  /**\n   * Get the url associated with this source.\n   *\n   * @return {string|import(\"../featureloader.js\").FeatureUrlFunction|undefined} The url.\n   * @api\n   */\n  VectorSource.prototype.getUrl = function getUrl () {\n    return this.url_;\n  };\n\n\n  /**\n   * @param {Event} event Event.\n   * @private\n   */\n  VectorSource.prototype.handleFeatureChange_ = function handleFeatureChange_ (event) {\n    var feature = /** @type {import(\"../Feature.js\").default} */ (event.target);\n    var featureKey = getUid(feature);\n    var geometry = feature.getGeometry();\n    if (!geometry) {\n      if (!(featureKey in this.nullGeometryFeatures_)) {\n        if (this.featuresRtree_) {\n          this.featuresRtree_.remove(feature);\n        }\n        this.nullGeometryFeatures_[featureKey] = feature;\n      }\n    } else {\n      var extent = geometry.getExtent();\n      if (featureKey in this.nullGeometryFeatures_) {\n        delete this.nullGeometryFeatures_[featureKey];\n        if (this.featuresRtree_) {\n          this.featuresRtree_.insert(extent, feature);\n        }\n      } else {\n        if (this.featuresRtree_) {\n          this.featuresRtree_.update(extent, feature);\n        }\n      }\n    }\n    var id = feature.getId();\n    if (id !== undefined) {\n      var sid = id.toString();\n      if (featureKey in this.undefIdIndex_) {\n        delete this.undefIdIndex_[featureKey];\n        this.idIndex_[sid] = feature;\n      } else {\n        if (this.idIndex_[sid] !== feature) {\n          this.removeFromIdIndex_(feature);\n          this.idIndex_[sid] = feature;\n        }\n      }\n    } else {\n      if (!(featureKey in this.undefIdIndex_)) {\n        this.removeFromIdIndex_(feature);\n        this.undefIdIndex_[featureKey] = feature;\n      }\n    }\n    this.changed();\n    this.dispatchEvent(new VectorSourceEvent(\n      VectorEventType.CHANGEFEATURE, feature));\n  };\n\n  /**\n   * Returns true if the feature is contained within the source.\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @return {boolean} Has feature.\n   * @api\n   */\n  VectorSource.prototype.hasFeature = function hasFeature (feature) {\n    var id = feature.getId();\n    if (id !== undefined) {\n      return id in this.idIndex_;\n    } else {\n      return getUid(feature) in this.undefIdIndex_;\n    }\n  };\n\n  /**\n   * @return {boolean} Is empty.\n   */\n  VectorSource.prototype.isEmpty = function isEmpty$1 () {\n    return this.featuresRtree_.isEmpty() && isEmpty(this.nullGeometryFeatures_);\n  };\n\n\n  /**\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @param {number} resolution Resolution.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   */\n  VectorSource.prototype.loadFeatures = function loadFeatures (extent, resolution, projection) {\n    var this$1 = this;\n\n    var loadedExtentsRtree = this.loadedExtentsRtree_;\n    var extentsToLoad = this.strategy_(extent, resolution);\n    this.loading = false;\n    var loop = function ( i, ii ) {\n      var extentToLoad = extentsToLoad[i];\n      var alreadyLoaded = loadedExtentsRtree.forEachInExtent(extentToLoad,\n        /**\n         * @param {{extent: import(\"../extent.js\").Extent}} object Object.\n         * @return {boolean} Contains.\n         */\n        function(object) {\n          return containsExtent(object.extent, extentToLoad);\n        });\n      if (!alreadyLoaded) {\n        this$1.loader_.call(this$1, extentToLoad, resolution, projection);\n        loadedExtentsRtree.insert(extentToLoad, {extent: extentToLoad.slice()});\n        this$1.loading = this$1.loader_ !== VOID;\n      }\n    };\n\n    for (var i = 0, ii = extentsToLoad.length; i < ii; ++i) loop( i, ii );\n  };\n\n\n  /**\n   * Remove an extent from the list of loaded extents.\n   * @param {import(\"../extent.js\").Extent} extent Extent.\n   * @api\n   */\n  VectorSource.prototype.removeLoadedExtent = function removeLoadedExtent (extent) {\n    var loadedExtentsRtree = this.loadedExtentsRtree_;\n    var obj;\n    loadedExtentsRtree.forEachInExtent(extent, function(object) {\n      if (equals(object.extent, extent)) {\n        obj = object;\n        return true;\n      }\n    });\n    if (obj) {\n      loadedExtentsRtree.remove(obj);\n    }\n  };\n\n\n  /**\n   * Remove a single feature from the source.  If you want to remove all features\n   * at once, use the {@link module:ol/source/Vector~VectorSource#clear #clear()} method\n   * instead.\n   * @param {import(\"../Feature.js\").default} feature Feature to remove.\n   * @api\n   */\n  VectorSource.prototype.removeFeature = function removeFeature (feature) {\n    var featureKey = getUid(feature);\n    if (featureKey in this.nullGeometryFeatures_) {\n      delete this.nullGeometryFeatures_[featureKey];\n    } else {\n      if (this.featuresRtree_) {\n        this.featuresRtree_.remove(feature);\n      }\n    }\n    this.removeFeatureInternal(feature);\n    this.changed();\n  };\n\n\n  /**\n   * Remove feature without firing a `change` event.\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @protected\n   */\n  VectorSource.prototype.removeFeatureInternal = function removeFeatureInternal (feature) {\n    var featureKey = getUid(feature);\n    this.featureChangeKeys_[featureKey].forEach(unlistenByKey);\n    delete this.featureChangeKeys_[featureKey];\n    var id = feature.getId();\n    if (id !== undefined) {\n      delete this.idIndex_[id.toString()];\n    } else {\n      delete this.undefIdIndex_[featureKey];\n    }\n    this.dispatchEvent(new VectorSourceEvent(\n      VectorEventType.REMOVEFEATURE, feature));\n  };\n\n\n  /**\n   * Remove a feature from the id index.  Called internally when the feature id\n   * may have changed.\n   * @param {import(\"../Feature.js\").default} feature The feature.\n   * @return {boolean} Removed the feature from the index.\n   * @private\n   */\n  VectorSource.prototype.removeFromIdIndex_ = function removeFromIdIndex_ (feature) {\n    var removed = false;\n    for (var id in this.idIndex_) {\n      if (this.idIndex_[id] === feature) {\n        delete this.idIndex_[id];\n        removed = true;\n        break;\n      }\n    }\n    return removed;\n  };\n\n\n  /**\n   * Set the new loader of the source. The next loadFeatures call will use the\n   * new loader.\n   * @param {import(\"../featureloader.js\").FeatureLoader} loader The loader to set.\n   * @api\n   */\n  VectorSource.prototype.setLoader = function setLoader (loader) {\n    this.loader_ = loader;\n  };\n\n  return VectorSource;\n}(Source));\n\n\nexport default VectorSource;\n\n//# sourceMappingURL=Vector.js.map","/**\n * @module ol/OverlayPositioning\n */\n\n/**\n * Overlay position: `'bottom-left'`, `'bottom-center'`,  `'bottom-right'`,\n * `'center-left'`, `'center-center'`, `'center-right'`, `'top-left'`,\n * `'top-center'`, `'top-right'`\n * @enum {string}\n */\nexport default {\n  BOTTOM_LEFT: 'bottom-left',\n  BOTTOM_CENTER: 'bottom-center',\n  BOTTOM_RIGHT: 'bottom-right',\n  CENTER_LEFT: 'center-left',\n  CENTER_CENTER: 'center-center',\n  CENTER_RIGHT: 'center-right',\n  TOP_LEFT: 'top-left',\n  TOP_CENTER: 'top-center',\n  TOP_RIGHT: 'top-right'\n};\n\n//# sourceMappingURL=OverlayPositioning.js.map","/**\n * @module ol/Overlay\n */\nimport MapEventType from './MapEventType.js';\nimport BaseObject, {getChangeEventType} from './Object.js';\nimport OverlayPositioning from './OverlayPositioning.js';\nimport {CLASS_SELECTABLE} from './css.js';\nimport {removeNode, removeChildren, outerWidth, outerHeight} from './dom.js';\nimport {listen, unlistenByKey} from './events.js';\nimport {containsExtent} from './extent.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number|string} [id] Set the overlay id. The overlay id can be used\n * with the {@link module:ol/Map~Map#getOverlayById} method.\n * @property {HTMLElement} [element] The overlay element.\n * @property {Array<number>} [offset=[0, 0]] Offsets in pixels used when positioning\n * the overlay. The first element in the\n * array is the horizontal offset. A positive value shifts the overlay right.\n * The second element in the array is the vertical offset. A positive value\n * shifts the overlay down.\n * @property {import(\"./coordinate.js\").Coordinate} [position] The overlay position\n * in map projection.\n * @property {OverlayPositioning} [positioning='top-left'] Defines how\n * the overlay is actually positioned with respect to its `position` property.\n * Possible values are `'bottom-left'`, `'bottom-center'`, `'bottom-right'`,\n * `'center-left'`, `'center-center'`, `'center-right'`, `'top-left'`,\n * `'top-center'`, and `'top-right'`.\n * @property {boolean} [stopEvent=true] Whether event propagation to the map\n * viewport should be stopped. If `true` the overlay is placed in the same\n * container as that of the controls (CSS class name\n * `ol-overlaycontainer-stopevent`); if `false` it is placed in the container\n * with CSS class name specified by the `className` property.\n * @property {boolean} [insertFirst=true] Whether the overlay is inserted first\n * in the overlay container, or appended. If the overlay is placed in the same\n * container as that of the controls (see the `stopEvent` option) you will\n * probably set `insertFirst` to `true` so the overlay is displayed below the\n * controls.\n * @property {boolean} [autoPan=false] If set to `true` the map is panned when\n * calling `setPosition`, so that the overlay is entirely visible in the current\n * viewport.\n * @property {PanOptions} [autoPanAnimation] The\n * animation options used to pan the overlay into view. This animation is only\n * used when `autoPan` is enabled. A `duration` and `easing` may be provided to\n * customize the animation.\n * @property {number} [autoPanMargin=20] The margin (in pixels) between the\n * overlay and the borders of the map when autopanning.\n * @property {string} [className='ol-overlay-container ol-selectable'] CSS class\n * name.\n */\n\n\n/**\n * @typedef {Object} PanOptions\n * @property {number} [duration=1000] The duration of the animation in\n * milliseconds.\n * @property {function(number):number} [easing] The easing function to use. Can\n * be one from {@link module:ol/easing} or a custom function.\n * Default is {@link module:ol/easing~inAndOut}.\n */\n\n\n/**\n * @enum {string}\n * @protected\n */\nvar Property = {\n  ELEMENT: 'element',\n  MAP: 'map',\n  OFFSET: 'offset',\n  POSITION: 'position',\n  POSITIONING: 'positioning'\n};\n\n\n/**\n * @classdesc\n * An element to be displayed over the map and attached to a single map\n * location.  Like {@link module:ol/control/Control~Control}, Overlays are\n * visible widgets. Unlike Controls, they are not in a fixed position on the\n * screen, but are tied to a geographical coordinate, so panning the map will\n * move an Overlay but not a Control.\n *\n * Example:\n *\n *     import Overlay from 'ol/Overlay';\n *\n *     var popup = new Overlay({\n *       element: document.getElementById('popup')\n *     });\n *     popup.setPosition(coordinate);\n *     map.addOverlay(popup);\n *\n * @api\n */\nvar Overlay = /*@__PURE__*/(function (BaseObject) {\n  function Overlay(options) {\n\n    BaseObject.call(this);\n\n    /**\n     * @protected\n     * @type {Options}\n     */\n    this.options = options;\n\n    /**\n     * @protected\n     * @type {number|string|undefined}\n     */\n    this.id = options.id;\n\n    /**\n     * @protected\n     * @type {boolean}\n     */\n    this.insertFirst = options.insertFirst !== undefined ?\n      options.insertFirst : true;\n\n    /**\n     * @protected\n     * @type {boolean}\n     */\n    this.stopEvent = options.stopEvent !== undefined ? options.stopEvent : true;\n\n    /**\n     * @protected\n     * @type {HTMLElement}\n     */\n    this.element = document.createElement('div');\n    this.element.className = options.className !== undefined ?\n      options.className : 'ol-overlay-container ' + CLASS_SELECTABLE;\n    this.element.style.position = 'absolute';\n\n    /**\n     * @protected\n     * @type {boolean}\n     */\n    this.autoPan = options.autoPan !== undefined ? options.autoPan : false;\n\n    /**\n     * @protected\n     * @type {PanOptions}\n     */\n    this.autoPanAnimation = options.autoPanAnimation || /** @type {PanOptions} */ ({});\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.autoPanMargin = options.autoPanMargin !== undefined ?\n      options.autoPanMargin : 20;\n\n    /**\n     * @protected\n     * @type {{bottom_: string,\n     *         left_: string,\n     *         right_: string,\n     *         top_: string,\n     *         visible: boolean}}\n     */\n    this.rendered = {\n      bottom_: '',\n      left_: '',\n      right_: '',\n      top_: '',\n      visible: true\n    };\n\n    /**\n     * @protected\n     * @type {?import(\"./events.js\").EventsKey}\n     */\n    this.mapPostrenderListenerKey = null;\n\n    listen(\n      this, getChangeEventType(Property.ELEMENT),\n      this.handleElementChanged, this);\n\n    listen(\n      this, getChangeEventType(Property.MAP),\n      this.handleMapChanged, this);\n\n    listen(\n      this, getChangeEventType(Property.OFFSET),\n      this.handleOffsetChanged, this);\n\n    listen(\n      this, getChangeEventType(Property.POSITION),\n      this.handlePositionChanged, this);\n\n    listen(\n      this, getChangeEventType(Property.POSITIONING),\n      this.handlePositioningChanged, this);\n\n    if (options.element !== undefined) {\n      this.setElement(options.element);\n    }\n\n    this.setOffset(options.offset !== undefined ? options.offset : [0, 0]);\n\n    this.setPositioning(options.positioning !== undefined ?\n      /** @type {OverlayPositioning} */ (options.positioning) :\n      OverlayPositioning.TOP_LEFT);\n\n    if (options.position !== undefined) {\n      this.setPosition(options.position);\n    }\n\n  }\n\n  if ( BaseObject ) Overlay.__proto__ = BaseObject;\n  Overlay.prototype = Object.create( BaseObject && BaseObject.prototype );\n  Overlay.prototype.constructor = Overlay;\n\n  /**\n   * Get the DOM element of this overlay.\n   * @return {HTMLElement|undefined} The Element containing the overlay.\n   * @observable\n   * @api\n   */\n  Overlay.prototype.getElement = function getElement () {\n    return /** @type {HTMLElement|undefined} */ (this.get(Property.ELEMENT));\n  };\n\n  /**\n   * Get the overlay identifier which is set on constructor.\n   * @return {number|string|undefined} Id.\n   * @api\n   */\n  Overlay.prototype.getId = function getId () {\n    return this.id;\n  };\n\n  /**\n   * Get the map associated with this overlay.\n   * @return {import(\"./PluggableMap.js\").default|undefined} The map that the\n   * overlay is part of.\n   * @observable\n   * @api\n   */\n  Overlay.prototype.getMap = function getMap () {\n    return (\n      /** @type {import(\"./PluggableMap.js\").default|undefined} */ (this.get(Property.MAP))\n    );\n  };\n\n  /**\n   * Get the offset of this overlay.\n   * @return {Array<number>} The offset.\n   * @observable\n   * @api\n   */\n  Overlay.prototype.getOffset = function getOffset () {\n    return /** @type {Array<number>} */ (this.get(Property.OFFSET));\n  };\n\n  /**\n   * Get the current position of this overlay.\n   * @return {import(\"./coordinate.js\").Coordinate|undefined} The spatial point that the overlay is\n   *     anchored at.\n   * @observable\n   * @api\n   */\n  Overlay.prototype.getPosition = function getPosition () {\n    return (\n      /** @type {import(\"./coordinate.js\").Coordinate|undefined} */ (this.get(Property.POSITION))\n    );\n  };\n\n  /**\n   * Get the current positioning of this overlay.\n   * @return {OverlayPositioning} How the overlay is positioned\n   *     relative to its point on the map.\n   * @observable\n   * @api\n   */\n  Overlay.prototype.getPositioning = function getPositioning () {\n    return (\n      /** @type {OverlayPositioning} */ (this.get(Property.POSITIONING))\n    );\n  };\n\n  /**\n   * @protected\n   */\n  Overlay.prototype.handleElementChanged = function handleElementChanged () {\n    removeChildren(this.element);\n    var element = this.getElement();\n    if (element) {\n      this.element.appendChild(element);\n    }\n  };\n\n  /**\n   * @protected\n   */\n  Overlay.prototype.handleMapChanged = function handleMapChanged () {\n    if (this.mapPostrenderListenerKey) {\n      removeNode(this.element);\n      unlistenByKey(this.mapPostrenderListenerKey);\n      this.mapPostrenderListenerKey = null;\n    }\n    var map = this.getMap();\n    if (map) {\n      this.mapPostrenderListenerKey = listen(map,\n        MapEventType.POSTRENDER, this.render, this);\n      this.updatePixelPosition();\n      var container = this.stopEvent ?\n        map.getOverlayContainerStopEvent() : map.getOverlayContainer();\n      if (this.insertFirst) {\n        container.insertBefore(this.element, container.childNodes[0] || null);\n      } else {\n        container.appendChild(this.element);\n      }\n    }\n  };\n\n  /**\n   * @protected\n   */\n  Overlay.prototype.render = function render () {\n    this.updatePixelPosition();\n  };\n\n  /**\n   * @protected\n   */\n  Overlay.prototype.handleOffsetChanged = function handleOffsetChanged () {\n    this.updatePixelPosition();\n  };\n\n  /**\n   * @protected\n   */\n  Overlay.prototype.handlePositionChanged = function handlePositionChanged () {\n    this.updatePixelPosition();\n    if (this.get(Property.POSITION) && this.autoPan) {\n      this.panIntoView();\n    }\n  };\n\n  /**\n   * @protected\n   */\n  Overlay.prototype.handlePositioningChanged = function handlePositioningChanged () {\n    this.updatePixelPosition();\n  };\n\n  /**\n   * Set the DOM element to be associated with this overlay.\n   * @param {HTMLElement|undefined} element The Element containing the overlay.\n   * @observable\n   * @api\n   */\n  Overlay.prototype.setElement = function setElement (element) {\n    this.set(Property.ELEMENT, element);\n  };\n\n  /**\n   * Set the map to be associated with this overlay.\n   * @param {import(\"./PluggableMap.js\").default|undefined} map The map that the\n   * overlay is part of.\n   * @observable\n   * @api\n   */\n  Overlay.prototype.setMap = function setMap (map) {\n    this.set(Property.MAP, map);\n  };\n\n  /**\n   * Set the offset for this overlay.\n   * @param {Array<number>} offset Offset.\n   * @observable\n   * @api\n   */\n  Overlay.prototype.setOffset = function setOffset (offset) {\n    this.set(Property.OFFSET, offset);\n  };\n\n  /**\n   * Set the position for this overlay. If the position is `undefined` the\n   * overlay is hidden.\n   * @param {import(\"./coordinate.js\").Coordinate|undefined} position The spatial point that the overlay\n   *     is anchored at.\n   * @observable\n   * @api\n   */\n  Overlay.prototype.setPosition = function setPosition (position) {\n    this.set(Property.POSITION, position);\n  };\n\n  /**\n   * Pan the map so that the overlay is entirely visible in the current viewport\n   * (if necessary).\n   * @protected\n   */\n  Overlay.prototype.panIntoView = function panIntoView () {\n    var map = this.getMap();\n\n    if (!map || !map.getTargetElement()) {\n      return;\n    }\n\n    var mapRect = this.getRect(map.getTargetElement(), map.getSize());\n    var element = this.getElement();\n    var overlayRect = this.getRect(element, [outerWidth(element), outerHeight(element)]);\n\n    var margin = this.autoPanMargin;\n    if (!containsExtent(mapRect, overlayRect)) {\n      // the overlay is not completely inside the viewport, so pan the map\n      var offsetLeft = overlayRect[0] - mapRect[0];\n      var offsetRight = mapRect[2] - overlayRect[2];\n      var offsetTop = overlayRect[1] - mapRect[1];\n      var offsetBottom = mapRect[3] - overlayRect[3];\n\n      var delta = [0, 0];\n      if (offsetLeft < 0) {\n        // move map to the left\n        delta[0] = offsetLeft - margin;\n      } else if (offsetRight < 0) {\n        // move map to the right\n        delta[0] = Math.abs(offsetRight) + margin;\n      }\n      if (offsetTop < 0) {\n        // move map up\n        delta[1] = offsetTop - margin;\n      } else if (offsetBottom < 0) {\n        // move map down\n        delta[1] = Math.abs(offsetBottom) + margin;\n      }\n\n      if (delta[0] !== 0 || delta[1] !== 0) {\n        var center = /** @type {import(\"./coordinate.js\").Coordinate} */ (map.getView().getCenter());\n        var centerPx = map.getPixelFromCoordinate(center);\n        var newCenterPx = [\n          centerPx[0] + delta[0],\n          centerPx[1] + delta[1]\n        ];\n\n        map.getView().animate({\n          center: map.getCoordinateFromPixel(newCenterPx),\n          duration: this.autoPanAnimation.duration,\n          easing: this.autoPanAnimation.easing\n        });\n      }\n    }\n  };\n\n  /**\n   * Get the extent of an element relative to the document\n   * @param {HTMLElement|undefined} element The element.\n   * @param {import(\"./size.js\").Size|undefined} size The size of the element.\n   * @return {import(\"./extent.js\").Extent} The extent.\n   * @protected\n   */\n  Overlay.prototype.getRect = function getRect (element, size) {\n    var box = element.getBoundingClientRect();\n    var offsetX = box.left + window.pageXOffset;\n    var offsetY = box.top + window.pageYOffset;\n    return [\n      offsetX,\n      offsetY,\n      offsetX + size[0],\n      offsetY + size[1]\n    ];\n  };\n\n  /**\n   * Set the positioning for this overlay.\n   * @param {OverlayPositioning} positioning how the overlay is\n   *     positioned relative to its point on the map.\n   * @observable\n   * @api\n   */\n  Overlay.prototype.setPositioning = function setPositioning (positioning) {\n    this.set(Property.POSITIONING, positioning);\n  };\n\n  /**\n   * Modify the visibility of the element.\n   * @param {boolean} visible Element visibility.\n   * @protected\n   */\n  Overlay.prototype.setVisible = function setVisible (visible) {\n    if (this.rendered.visible !== visible) {\n      this.element.style.display = visible ? '' : 'none';\n      this.rendered.visible = visible;\n    }\n  };\n\n  /**\n   * Update pixel position.\n   * @protected\n   */\n  Overlay.prototype.updatePixelPosition = function updatePixelPosition () {\n    var map = this.getMap();\n    var position = this.getPosition();\n    if (!map || !map.isRendered() || !position) {\n      this.setVisible(false);\n      return;\n    }\n\n    var pixel = map.getPixelFromCoordinate(position);\n    var mapSize = map.getSize();\n    this.updateRenderedPosition(pixel, mapSize);\n  };\n\n  /**\n   * @param {import(\"./pixel.js\").Pixel} pixel The pixel location.\n   * @param {import(\"./size.js\").Size|undefined} mapSize The map size.\n   * @protected\n   */\n  Overlay.prototype.updateRenderedPosition = function updateRenderedPosition (pixel, mapSize) {\n    var style = this.element.style;\n    var offset = this.getOffset();\n\n    var positioning = this.getPositioning();\n\n    this.setVisible(true);\n\n    var offsetX = offset[0];\n    var offsetY = offset[1];\n    if (positioning == OverlayPositioning.BOTTOM_RIGHT ||\n        positioning == OverlayPositioning.CENTER_RIGHT ||\n        positioning == OverlayPositioning.TOP_RIGHT) {\n      if (this.rendered.left_ !== '') {\n        this.rendered.left_ = style.left = '';\n      }\n      var right = Math.round(mapSize[0] - pixel[0] - offsetX) + 'px';\n      if (this.rendered.right_ != right) {\n        this.rendered.right_ = style.right = right;\n      }\n    } else {\n      if (this.rendered.right_ !== '') {\n        this.rendered.right_ = style.right = '';\n      }\n      if (positioning == OverlayPositioning.BOTTOM_CENTER ||\n          positioning == OverlayPositioning.CENTER_CENTER ||\n          positioning == OverlayPositioning.TOP_CENTER) {\n        offsetX -= this.element.offsetWidth / 2;\n      }\n      var left = Math.round(pixel[0] + offsetX) + 'px';\n      if (this.rendered.left_ != left) {\n        this.rendered.left_ = style.left = left;\n      }\n    }\n    if (positioning == OverlayPositioning.BOTTOM_LEFT ||\n        positioning == OverlayPositioning.BOTTOM_CENTER ||\n        positioning == OverlayPositioning.BOTTOM_RIGHT) {\n      if (this.rendered.top_ !== '') {\n        this.rendered.top_ = style.top = '';\n      }\n      var bottom = Math.round(mapSize[1] - pixel[1] - offsetY) + 'px';\n      if (this.rendered.bottom_ != bottom) {\n        this.rendered.bottom_ = style.bottom = bottom;\n      }\n    } else {\n      if (this.rendered.bottom_ !== '') {\n        this.rendered.bottom_ = style.bottom = '';\n      }\n      if (positioning == OverlayPositioning.CENTER_LEFT ||\n          positioning == OverlayPositioning.CENTER_CENTER ||\n          positioning == OverlayPositioning.CENTER_RIGHT) {\n        offsetY -= this.element.offsetHeight / 2;\n      }\n      var top = Math.round(pixel[1] + offsetY) + 'px';\n      if (this.rendered.top_ != top) {\n        this.rendered.top_ = style.top = top;\n      }\n    }\n  };\n\n  /**\n   * returns the options this Overlay has been created with\n   * @return {Options} overlay options\n   */\n  Overlay.prototype.getOptions = function getOptions () {\n    return this.options;\n  };\n\n  return Overlay;\n}(BaseObject));\n\n\nexport default Overlay;\n\n//# sourceMappingURL=Overlay.js.map","/**\n * @module ol/geom/flat/interpolate\n */\nimport {binarySearch} from '../../array.js';\nimport {lerp} from '../../math.js';\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} fraction Fraction.\n * @param {Array<number>=} opt_dest Destination.\n * @return {Array<number>} Destination.\n */\nexport function interpolatePoint(flatCoordinates, offset, end, stride, fraction, opt_dest) {\n  var pointX = NaN;\n  var pointY = NaN;\n  var n = (end - offset) / stride;\n  if (n === 1) {\n    pointX = flatCoordinates[offset];\n    pointY = flatCoordinates[offset + 1];\n  } else if (n == 2) {\n    pointX = (1 - fraction) * flatCoordinates[offset] +\n        fraction * flatCoordinates[offset + stride];\n    pointY = (1 - fraction) * flatCoordinates[offset + 1] +\n        fraction * flatCoordinates[offset + stride + 1];\n  } else if (n !== 0) {\n    var x1 = flatCoordinates[offset];\n    var y1 = flatCoordinates[offset + 1];\n    var length = 0;\n    var cumulativeLengths = [0];\n    for (var i = offset + stride; i < end; i += stride) {\n      var x2 = flatCoordinates[i];\n      var y2 = flatCoordinates[i + 1];\n      length += Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));\n      cumulativeLengths.push(length);\n      x1 = x2;\n      y1 = y2;\n    }\n    var target = fraction * length;\n    var index = binarySearch(cumulativeLengths, target);\n    if (index < 0) {\n      var t = (target - cumulativeLengths[-index - 2]) /\n          (cumulativeLengths[-index - 1] - cumulativeLengths[-index - 2]);\n      var o = offset + (-index - 2) * stride;\n      pointX = lerp(\n        flatCoordinates[o], flatCoordinates[o + stride], t);\n      pointY = lerp(\n        flatCoordinates[o + 1], flatCoordinates[o + stride + 1], t);\n    } else {\n      pointX = flatCoordinates[offset + index * stride];\n      pointY = flatCoordinates[offset + index * stride + 1];\n    }\n  }\n  if (opt_dest) {\n    opt_dest[0] = pointX;\n    opt_dest[1] = pointY;\n    return opt_dest;\n  } else {\n    return [pointX, pointY];\n  }\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} m M.\n * @param {boolean} extrapolate Extrapolate.\n * @return {import(\"../../coordinate.js\").Coordinate} Coordinate.\n */\nexport function lineStringCoordinateAtM(flatCoordinates, offset, end, stride, m, extrapolate) {\n  if (end == offset) {\n    return null;\n  }\n  var coordinate;\n  if (m < flatCoordinates[offset + stride - 1]) {\n    if (extrapolate) {\n      coordinate = flatCoordinates.slice(offset, offset + stride);\n      coordinate[stride - 1] = m;\n      return coordinate;\n    } else {\n      return null;\n    }\n  } else if (flatCoordinates[end - 1] < m) {\n    if (extrapolate) {\n      coordinate = flatCoordinates.slice(end - stride, end);\n      coordinate[stride - 1] = m;\n      return coordinate;\n    } else {\n      return null;\n    }\n  }\n  // FIXME use O(1) search\n  if (m == flatCoordinates[offset + stride - 1]) {\n    return flatCoordinates.slice(offset, offset + stride);\n  }\n  var lo = offset / stride;\n  var hi = end / stride;\n  while (lo < hi) {\n    var mid = (lo + hi) >> 1;\n    if (m < flatCoordinates[(mid + 1) * stride - 1]) {\n      hi = mid;\n    } else {\n      lo = mid + 1;\n    }\n  }\n  var m0 = flatCoordinates[lo * stride - 1];\n  if (m == m0) {\n    return flatCoordinates.slice((lo - 1) * stride, (lo - 1) * stride + stride);\n  }\n  var m1 = flatCoordinates[(lo + 1) * stride - 1];\n  var t = (m - m0) / (m1 - m0);\n  coordinate = [];\n  for (var i = 0; i < stride - 1; ++i) {\n    coordinate.push(lerp(flatCoordinates[(lo - 1) * stride + i],\n      flatCoordinates[lo * stride + i], t));\n  }\n  coordinate.push(m);\n  return coordinate;\n}\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} m M.\n * @param {boolean} extrapolate Extrapolate.\n * @param {boolean} interpolate Interpolate.\n * @return {import(\"../../coordinate.js\").Coordinate} Coordinate.\n */\nexport function lineStringsCoordinateAtM(\n  flatCoordinates, offset, ends, stride, m, extrapolate, interpolate) {\n  if (interpolate) {\n    return lineStringCoordinateAtM(\n      flatCoordinates, offset, ends[ends.length - 1], stride, m, extrapolate);\n  }\n  var coordinate;\n  if (m < flatCoordinates[stride - 1]) {\n    if (extrapolate) {\n      coordinate = flatCoordinates.slice(0, stride);\n      coordinate[stride - 1] = m;\n      return coordinate;\n    } else {\n      return null;\n    }\n  }\n  if (flatCoordinates[flatCoordinates.length - 1] < m) {\n    if (extrapolate) {\n      coordinate = flatCoordinates.slice(flatCoordinates.length - stride);\n      coordinate[stride - 1] = m;\n      return coordinate;\n    } else {\n      return null;\n    }\n  }\n  for (var i = 0, ii = ends.length; i < ii; ++i) {\n    var end = ends[i];\n    if (offset == end) {\n      continue;\n    }\n    if (m < flatCoordinates[offset + stride - 1]) {\n      return null;\n    } else if (m <= flatCoordinates[end - 1]) {\n      return lineStringCoordinateAtM(\n        flatCoordinates, offset, end, stride, m, false);\n    }\n    offset = end;\n  }\n  return null;\n}\n\n//# sourceMappingURL=interpolate.js.map","/**\n * @module ol/geom/LineString\n */\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport GeometryLayout from './GeometryLayout.js';\nimport GeometryType from './GeometryType.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {assignClosestPoint, maxSquaredDelta} from './flat/closest.js';\nimport {deflateCoordinates} from './flat/deflate.js';\nimport {inflateCoordinates} from './flat/inflate.js';\nimport {interpolatePoint, lineStringCoordinateAtM} from './flat/interpolate.js';\nimport {intersectsLineString} from './flat/intersectsextent.js';\nimport {lineStringLength} from './flat/length.js';\nimport {forEach as forEachSegment} from './flat/segments.js';\nimport {douglasPeucker} from './flat/simplify.js';\n\n/**\n * @classdesc\n * Linestring geometry.\n *\n * @api\n */\nvar LineString = /*@__PURE__*/(function (SimpleGeometry) {\n  function LineString(coordinates, opt_layout) {\n\n    SimpleGeometry.call(this);\n\n    /**\n     * @private\n     * @type {import(\"../coordinate.js\").Coordinate}\n     */\n    this.flatMidpoint_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.flatMidpointRevision_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDelta_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDeltaRevision_ = -1;\n\n    if (opt_layout !== undefined && !Array.isArray(coordinates[0])) {\n      this.setFlatCoordinates(opt_layout, /** @type {Array<number>} */ (coordinates));\n    } else {\n      this.setCoordinates(/** @type {Array<import(\"../coordinate.js\").Coordinate>} */ (coordinates), opt_layout);\n    }\n\n  }\n\n  if ( SimpleGeometry ) LineString.__proto__ = SimpleGeometry;\n  LineString.prototype = Object.create( SimpleGeometry && SimpleGeometry.prototype );\n  LineString.prototype.constructor = LineString;\n\n  /**\n   * Append the passed coordinate to the coordinates of the linestring.\n   * @param {import(\"../coordinate.js\").Coordinate} coordinate Coordinate.\n   * @api\n   */\n  LineString.prototype.appendCoordinate = function appendCoordinate (coordinate) {\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = coordinate.slice();\n    } else {\n      extend(this.flatCoordinates, coordinate);\n    }\n    this.changed();\n  };\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!LineString} Clone.\n   * @override\n   * @api\n   */\n  LineString.prototype.clone = function clone () {\n    return new LineString(this.flatCoordinates.slice(), this.layout);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  LineString.prototype.closestPointXY = function closestPointXY (x, y, closestPoint, minSquaredDistance) {\n    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n      return minSquaredDistance;\n    }\n    if (this.maxDeltaRevision_ != this.getRevision()) {\n      this.maxDelta_ = Math.sqrt(maxSquaredDelta(\n        this.flatCoordinates, 0, this.flatCoordinates.length, this.stride, 0));\n      this.maxDeltaRevision_ = this.getRevision();\n    }\n    return assignClosestPoint(\n      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,\n      this.maxDelta_, false, x, y, closestPoint, minSquaredDistance);\n  };\n\n  /**\n   * Iterate over each segment, calling the provided callback.\n   * If the callback returns a truthy value the function returns that\n   * value immediately. Otherwise the function returns `false`.\n   *\n   * @param {function(this: S, import(\"../coordinate.js\").Coordinate, import(\"../coordinate.js\").Coordinate): T} callback Function\n   *     called for each segment.\n   * @return {T|boolean} Value.\n   * @template T,S\n   * @api\n   */\n  LineString.prototype.forEachSegment = function forEachSegment$1 (callback) {\n    return forEachSegment(this.flatCoordinates, 0, this.flatCoordinates.length, this.stride, callback);\n  };\n\n  /**\n   * Returns the coordinate at `m` using linear interpolation, or `null` if no\n   * such coordinate exists.\n   *\n   * `opt_extrapolate` controls extrapolation beyond the range of Ms in the\n   * MultiLineString. If `opt_extrapolate` is `true` then Ms less than the first\n   * M will return the first coordinate and Ms greater than the last M will\n   * return the last coordinate.\n   *\n   * @param {number} m M.\n   * @param {boolean=} opt_extrapolate Extrapolate. Default is `false`.\n   * @return {import(\"../coordinate.js\").Coordinate} Coordinate.\n   * @api\n   */\n  LineString.prototype.getCoordinateAtM = function getCoordinateAtM (m, opt_extrapolate) {\n    if (this.layout != GeometryLayout.XYM &&\n        this.layout != GeometryLayout.XYZM) {\n      return null;\n    }\n    var extrapolate = opt_extrapolate !== undefined ? opt_extrapolate : false;\n    return lineStringCoordinateAtM(this.flatCoordinates, 0,\n      this.flatCoordinates.length, this.stride, m, extrapolate);\n  };\n\n  /**\n   * Return the coordinates of the linestring.\n   * @return {Array<import(\"../coordinate.js\").Coordinate>} Coordinates.\n   * @override\n   * @api\n   */\n  LineString.prototype.getCoordinates = function getCoordinates () {\n    return inflateCoordinates(\n      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);\n  };\n\n  /**\n   * Return the coordinate at the provided fraction along the linestring.\n   * The `fraction` is a number between 0 and 1, where 0 is the start of the\n   * linestring and 1 is the end.\n   * @param {number} fraction Fraction.\n   * @param {import(\"../coordinate.js\").Coordinate=} opt_dest Optional coordinate whose values will\n   *     be modified. If not provided, a new coordinate will be returned.\n   * @return {import(\"../coordinate.js\").Coordinate} Coordinate of the interpolated point.\n   * @api\n   */\n  LineString.prototype.getCoordinateAt = function getCoordinateAt (fraction, opt_dest) {\n    return interpolatePoint(\n      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,\n      fraction, opt_dest);\n  };\n\n  /**\n   * Return the length of the linestring on projected plane.\n   * @return {number} Length (on projected plane).\n   * @api\n   */\n  LineString.prototype.getLength = function getLength () {\n    return lineStringLength(\n      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);\n  };\n\n  /**\n   * @return {Array<number>} Flat midpoint.\n   */\n  LineString.prototype.getFlatMidpoint = function getFlatMidpoint () {\n    if (this.flatMidpointRevision_ != this.getRevision()) {\n      this.flatMidpoint_ = this.getCoordinateAt(0.5, this.flatMidpoint_);\n      this.flatMidpointRevision_ = this.getRevision();\n    }\n    return this.flatMidpoint_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  LineString.prototype.getSimplifiedGeometryInternal = function getSimplifiedGeometryInternal (squaredTolerance) {\n    var simplifiedFlatCoordinates = [];\n    simplifiedFlatCoordinates.length = douglasPeucker(\n      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,\n      squaredTolerance, simplifiedFlatCoordinates, 0);\n    return new LineString(simplifiedFlatCoordinates, GeometryLayout.XY);\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  LineString.prototype.getType = function getType () {\n    return GeometryType.LINE_STRING;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  LineString.prototype.intersectsExtent = function intersectsExtent (extent) {\n    return intersectsLineString(\n      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,\n      extent);\n  };\n\n  /**\n   * Set the coordinates of the linestring.\n   * @param {!Array<import(\"../coordinate.js\").Coordinate>} coordinates Coordinates.\n   * @param {GeometryLayout=} opt_layout Layout.\n   * @override\n   * @api\n   */\n  LineString.prototype.setCoordinates = function setCoordinates (coordinates, opt_layout) {\n    this.setLayout(opt_layout, coordinates, 1);\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = [];\n    }\n    this.flatCoordinates.length = deflateCoordinates(\n      this.flatCoordinates, 0, coordinates, this.stride);\n    this.changed();\n  };\n\n  return LineString;\n}(SimpleGeometry));\n\n\nexport default LineString;\n\n//# sourceMappingURL=LineString.js.map","/**\n * @module ol/Feature\n */\nimport {assert} from './asserts.js';\nimport {listen, unlisten, unlistenByKey} from './events.js';\nimport EventType from './events/EventType.js';\nimport BaseObject, {getChangeEventType} from './Object.js';\n\n/**\n * @typedef {typeof Feature|typeof import(\"./render/Feature.js\").default} FeatureClass\n */\n\n/**\n * @typedef {Feature|import(\"./render/Feature.js\").default} FeatureLike\n */\n\n/**\n * @classdesc\n * A vector object for geographic features with a geometry and other\n * attribute properties, similar to the features in vector file formats like\n * GeoJSON.\n *\n * Features can be styled individually with `setStyle`; otherwise they use the\n * style of their vector layer.\n *\n * Note that attribute properties are set as {@link module:ol/Object} properties on\n * the feature object, so they are observable, and have get/set accessors.\n *\n * Typically, a feature has a single geometry property. You can set the\n * geometry using the `setGeometry` method and get it with `getGeometry`.\n * It is possible to store more than one geometry on a feature using attribute\n * properties. By default, the geometry used for rendering is identified by\n * the property name `geometry`. If you want to use another geometry property\n * for rendering, use the `setGeometryName` method to change the attribute\n * property associated with the geometry for the feature.  For example:\n *\n * ```js\n *\n * import Feature from 'ol/Feature';\n * import Polygon from 'ol/geom/Polygon';\n * import Point from 'ol/geom/Point';\n *\n * var feature = new Feature({\n *   geometry: new Polygon(polyCoords),\n *   labelPoint: new Point(labelCoords),\n *   name: 'My Polygon'\n * });\n *\n * // get the polygon geometry\n * var poly = feature.getGeometry();\n *\n * // Render the feature as a point using the coordinates from labelPoint\n * feature.setGeometryName('labelPoint');\n *\n * // get the point geometry\n * var point = feature.getGeometry();\n * ```\n *\n * @api\n */\nvar Feature = /*@__PURE__*/(function (BaseObject) {\n  function Feature(opt_geometryOrProperties) {\n\n    BaseObject.call(this);\n\n    /**\n     * @private\n     * @type {number|string|undefined}\n     */\n    this.id_ = undefined;\n\n    /**\n     * @type {string}\n     * @private\n     */\n    this.geometryName_ = 'geometry';\n\n    /**\n     * User provided style.\n     * @private\n     * @type {import(\"./style/Style.js\").StyleLike}\n     */\n    this.style_ = null;\n\n    /**\n     * @private\n     * @type {import(\"./style/Style.js\").StyleFunction|undefined}\n     */\n    this.styleFunction_ = undefined;\n\n    /**\n     * @private\n     * @type {?import(\"./events.js\").EventsKey}\n     */\n    this.geometryChangeKey_ = null;\n\n    listen(\n      this, getChangeEventType(this.geometryName_),\n      this.handleGeometryChanged_, this);\n\n    if (opt_geometryOrProperties) {\n      if (typeof /** @type {?} */ (opt_geometryOrProperties).getSimplifiedGeometry === 'function') {\n        var geometry = /** @type {import(\"./geom/Geometry.js\").default} */ (opt_geometryOrProperties);\n        this.setGeometry(geometry);\n      } else {\n        /** @type {Object<string, *>} */\n        var properties = opt_geometryOrProperties;\n        this.setProperties(properties);\n      }\n    }\n  }\n\n  if ( BaseObject ) Feature.__proto__ = BaseObject;\n  Feature.prototype = Object.create( BaseObject && BaseObject.prototype );\n  Feature.prototype.constructor = Feature;\n\n  /**\n   * Clone this feature. If the original feature has a geometry it\n   * is also cloned. The feature id is not set in the clone.\n   * @return {Feature} The clone.\n   * @api\n   */\n  Feature.prototype.clone = function clone () {\n    var clone = new Feature(this.getProperties());\n    clone.setGeometryName(this.getGeometryName());\n    var geometry = this.getGeometry();\n    if (geometry) {\n      clone.setGeometry(geometry.clone());\n    }\n    var style = this.getStyle();\n    if (style) {\n      clone.setStyle(style);\n    }\n    return clone;\n  };\n\n  /**\n   * Get the feature's default geometry.  A feature may have any number of named\n   * geometries.  The \"default\" geometry (the one that is rendered by default) is\n   * set when calling {@link module:ol/Feature~Feature#setGeometry}.\n   * @return {import(\"./geom/Geometry.js\").default|undefined} The default geometry for the feature.\n   * @api\n   * @observable\n   */\n  Feature.prototype.getGeometry = function getGeometry () {\n    return (\n      /** @type {import(\"./geom/Geometry.js\").default|undefined} */ (this.get(this.geometryName_))\n    );\n  };\n\n  /**\n   * Get the feature identifier.  This is a stable identifier for the feature and\n   * is either set when reading data from a remote source or set explicitly by\n   * calling {@link module:ol/Feature~Feature#setId}.\n   * @return {number|string|undefined} Id.\n   * @api\n   */\n  Feature.prototype.getId = function getId () {\n    return this.id_;\n  };\n\n  /**\n   * Get the name of the feature's default geometry.  By default, the default\n   * geometry is named `geometry`.\n   * @return {string} Get the property name associated with the default geometry\n   *     for this feature.\n   * @api\n   */\n  Feature.prototype.getGeometryName = function getGeometryName () {\n    return this.geometryName_;\n  };\n\n  /**\n   * Get the feature's style. Will return what was provided to the\n   * {@link module:ol/Feature~Feature#setStyle} method.\n   * @return {import(\"./style/Style.js\").StyleLike} The feature style.\n   * @api\n   */\n  Feature.prototype.getStyle = function getStyle () {\n    return this.style_;\n  };\n\n  /**\n   * Get the feature's style function.\n   * @return {import(\"./style/Style.js\").StyleFunction|undefined} Return a function\n   * representing the current style of this feature.\n   * @api\n   */\n  Feature.prototype.getStyleFunction = function getStyleFunction () {\n    return this.styleFunction_;\n  };\n\n  /**\n   * @private\n   */\n  Feature.prototype.handleGeometryChange_ = function handleGeometryChange_ () {\n    this.changed();\n  };\n\n  /**\n   * @private\n   */\n  Feature.prototype.handleGeometryChanged_ = function handleGeometryChanged_ () {\n    if (this.geometryChangeKey_) {\n      unlistenByKey(this.geometryChangeKey_);\n      this.geometryChangeKey_ = null;\n    }\n    var geometry = this.getGeometry();\n    if (geometry) {\n      this.geometryChangeKey_ = listen(geometry,\n        EventType.CHANGE, this.handleGeometryChange_, this);\n    }\n    this.changed();\n  };\n\n  /**\n   * Set the default geometry for the feature.  This will update the property\n   * with the name returned by {@link module:ol/Feature~Feature#getGeometryName}.\n   * @param {import(\"./geom/Geometry.js\").default|undefined} geometry The new geometry.\n   * @api\n   * @observable\n   */\n  Feature.prototype.setGeometry = function setGeometry (geometry) {\n    this.set(this.geometryName_, geometry);\n  };\n\n  /**\n   * Set the style for the feature.  This can be a single style object, an array\n   * of styles, or a function that takes a resolution and returns an array of\n   * styles. If it is `null` the feature has no style (a `null` style).\n   * @param {import(\"./style/Style.js\").StyleLike} style Style for this feature.\n   * @api\n   * @fires module:ol/events/Event~Event#event:change\n   */\n  Feature.prototype.setStyle = function setStyle (style) {\n    this.style_ = style;\n    this.styleFunction_ = !style ? undefined : createStyleFunction(style);\n    this.changed();\n  };\n\n  /**\n   * Set the feature id.  The feature id is considered stable and may be used when\n   * requesting features or comparing identifiers returned from a remote source.\n   * The feature id can be used with the\n   * {@link module:ol/source/Vector~VectorSource#getFeatureById} method.\n   * @param {number|string|undefined} id The feature id.\n   * @api\n   * @fires module:ol/events/Event~Event#event:change\n   */\n  Feature.prototype.setId = function setId (id) {\n    this.id_ = id;\n    this.changed();\n  };\n\n  /**\n   * Set the property name to be used when getting the feature's default geometry.\n   * When calling {@link module:ol/Feature~Feature#getGeometry}, the value of the property with\n   * this name will be returned.\n   * @param {string} name The property name of the default geometry.\n   * @api\n   */\n  Feature.prototype.setGeometryName = function setGeometryName (name) {\n    unlisten(\n      this, getChangeEventType(this.geometryName_),\n      this.handleGeometryChanged_, this);\n    this.geometryName_ = name;\n    listen(\n      this, getChangeEventType(this.geometryName_),\n      this.handleGeometryChanged_, this);\n    this.handleGeometryChanged_();\n  };\n\n  return Feature;\n}(BaseObject));\n\n\n/**\n * Convert the provided object into a feature style function.  Functions passed\n * through unchanged.  Arrays of Style or single style objects wrapped\n * in a new feature style function.\n * @param {!import(\"./style/Style.js\").StyleFunction|!Array<import(\"./style/Style.js\").default>|!import(\"./style/Style.js\").default} obj\n *     A feature style function, a single style, or an array of styles.\n * @return {import(\"./style/Style.js\").StyleFunction} A style function.\n */\nexport function createStyleFunction(obj) {\n  if (typeof obj === 'function') {\n    return obj;\n  } else {\n    /**\n     * @type {Array<import(\"./style/Style.js\").default>}\n     */\n    var styles;\n    if (Array.isArray(obj)) {\n      styles = obj;\n    } else {\n      assert(typeof /** @type {?} */ (obj).getZIndex === 'function',\n        41); // Expected an `import(\"./style/Style.js\").Style` or an array of `import(\"./style/Style.js\").Style`\n      var style = /** @type {import(\"./style/Style.js\").default} */ (obj);\n      styles = [style];\n    }\n    return function() {\n      return styles;\n    };\n  }\n}\nexport default Feature;\n\n//# sourceMappingURL=Feature.js.map","/**\n * @module ol/geom/Circle\n */\nimport {createOrUpdate, forEachCorner, intersects} from '../extent.js';\nimport GeometryType from './GeometryType.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {deflateCoordinate} from './flat/deflate.js';\n\n/**\n * @classdesc\n * Circle geometry.\n *\n * @api\n */\nvar Circle = /*@__PURE__*/(function (SimpleGeometry) {\n  function Circle(center, opt_radius, opt_layout) {\n    SimpleGeometry.call(this);\n    if (opt_layout !== undefined && opt_radius === undefined) {\n      this.setFlatCoordinates(opt_layout, center);\n    } else {\n      var radius = opt_radius ? opt_radius : 0;\n      this.setCenterAndRadius(center, radius, opt_layout);\n    }\n  }\n\n  if ( SimpleGeometry ) Circle.__proto__ = SimpleGeometry;\n  Circle.prototype = Object.create( SimpleGeometry && SimpleGeometry.prototype );\n  Circle.prototype.constructor = Circle;\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!Circle} Clone.\n   * @override\n   * @api\n   */\n  Circle.prototype.clone = function clone () {\n    return new Circle(this.flatCoordinates.slice(), undefined, this.layout);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  Circle.prototype.closestPointXY = function closestPointXY (x, y, closestPoint, minSquaredDistance) {\n    var flatCoordinates = this.flatCoordinates;\n    var dx = x - flatCoordinates[0];\n    var dy = y - flatCoordinates[1];\n    var squaredDistance = dx * dx + dy * dy;\n    if (squaredDistance < minSquaredDistance) {\n      if (squaredDistance === 0) {\n        for (var i = 0; i < this.stride; ++i) {\n          closestPoint[i] = flatCoordinates[i];\n        }\n      } else {\n        var delta = this.getRadius() / Math.sqrt(squaredDistance);\n        closestPoint[0] = flatCoordinates[0] + delta * dx;\n        closestPoint[1] = flatCoordinates[1] + delta * dy;\n        for (var i$1 = 2; i$1 < this.stride; ++i$1) {\n          closestPoint[i$1] = flatCoordinates[i$1];\n        }\n      }\n      closestPoint.length = this.stride;\n      return squaredDistance;\n    } else {\n      return minSquaredDistance;\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  Circle.prototype.containsXY = function containsXY (x, y) {\n    var flatCoordinates = this.flatCoordinates;\n    var dx = x - flatCoordinates[0];\n    var dy = y - flatCoordinates[1];\n    return dx * dx + dy * dy <= this.getRadiusSquared_();\n  };\n\n  /**\n   * Return the center of the circle as {@link module:ol/coordinate~Coordinate coordinate}.\n   * @return {import(\"../coordinate.js\").Coordinate} Center.\n   * @api\n   */\n  Circle.prototype.getCenter = function getCenter () {\n    return this.flatCoordinates.slice(0, this.stride);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  Circle.prototype.computeExtent = function computeExtent (extent) {\n    var flatCoordinates = this.flatCoordinates;\n    var radius = flatCoordinates[this.stride] - flatCoordinates[0];\n    return createOrUpdate(\n      flatCoordinates[0] - radius, flatCoordinates[1] - radius,\n      flatCoordinates[0] + radius, flatCoordinates[1] + radius,\n      extent);\n  };\n\n  /**\n   * Return the radius of the circle.\n   * @return {number} Radius.\n   * @api\n   */\n  Circle.prototype.getRadius = function getRadius () {\n    return Math.sqrt(this.getRadiusSquared_());\n  };\n\n  /**\n   * @private\n   * @return {number} Radius squared.\n   */\n  Circle.prototype.getRadiusSquared_ = function getRadiusSquared_ () {\n    var dx = this.flatCoordinates[this.stride] - this.flatCoordinates[0];\n    var dy = this.flatCoordinates[this.stride + 1] - this.flatCoordinates[1];\n    return dx * dx + dy * dy;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  Circle.prototype.getType = function getType () {\n    return GeometryType.CIRCLE;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  Circle.prototype.intersectsExtent = function intersectsExtent (extent) {\n    var circleExtent = this.getExtent();\n    if (intersects(extent, circleExtent)) {\n      var center = this.getCenter();\n\n      if (extent[0] <= center[0] && extent[2] >= center[0]) {\n        return true;\n      }\n      if (extent[1] <= center[1] && extent[3] >= center[1]) {\n        return true;\n      }\n\n      return forEachCorner(extent, this.intersectsCoordinate, this);\n    }\n    return false;\n\n  };\n\n  /**\n   * Set the center of the circle as {@link module:ol/coordinate~Coordinate coordinate}.\n   * @param {import(\"../coordinate.js\").Coordinate} center Center.\n   * @api\n   */\n  Circle.prototype.setCenter = function setCenter (center) {\n    var stride = this.stride;\n    var radius = this.flatCoordinates[stride] - this.flatCoordinates[0];\n    var flatCoordinates = center.slice();\n    flatCoordinates[stride] = flatCoordinates[0] + radius;\n    for (var i = 1; i < stride; ++i) {\n      flatCoordinates[stride + i] = center[i];\n    }\n    this.setFlatCoordinates(this.layout, flatCoordinates);\n    this.changed();\n  };\n\n  /**\n   * Set the center (as {@link module:ol/coordinate~Coordinate coordinate}) and the radius (as\n   * number) of the circle.\n   * @param {!import(\"../coordinate.js\").Coordinate} center Center.\n   * @param {number} radius Radius.\n   * @param {import(\"./GeometryLayout.js\").default=} opt_layout Layout.\n   * @api\n   */\n  Circle.prototype.setCenterAndRadius = function setCenterAndRadius (center, radius, opt_layout) {\n    this.setLayout(opt_layout, center, 0);\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = [];\n    }\n    /** @type {Array<number>} */\n    var flatCoordinates = this.flatCoordinates;\n    var offset = deflateCoordinate(\n      flatCoordinates, 0, center, this.stride);\n    flatCoordinates[offset++] = flatCoordinates[0] + radius;\n    for (var i = 1, ii = this.stride; i < ii; ++i) {\n      flatCoordinates[offset++] = flatCoordinates[i];\n    }\n    flatCoordinates.length = offset;\n    this.changed();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  Circle.prototype.getCoordinates = function getCoordinates () {\n    return null;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  Circle.prototype.setCoordinates = function setCoordinates (coordinates, opt_layout) {};\n\n  /**\n   * Set the radius of the circle. The radius is in the units of the projection.\n   * @param {number} radius Radius.\n   * @api\n   */\n  Circle.prototype.setRadius = function setRadius (radius) {\n    this.flatCoordinates[this.stride] = this.flatCoordinates[0] + radius;\n    this.changed();\n  };\n\n  return Circle;\n}(SimpleGeometry));\n\n\n/**\n * Transform each coordinate of the circle from one coordinate reference system\n * to another. The geometry is modified in place.\n * If you do not want the geometry modified in place, first clone() it and\n * then use this function on the clone.\n *\n * Internally a circle is currently represented by two points: the center of\n * the circle `[cx, cy]`, and the point to the right of the circle\n * `[cx + r, cy]`. This `transform` function just transforms these two points.\n * So the resulting geometry is also a circle, and that circle does not\n * correspond to the shape that would be obtained by transforming every point\n * of the original circle.\n *\n * @param {import(\"../proj.js\").ProjectionLike} source The current projection.  Can be a\n *     string identifier or a {@link module:ol/proj/Projection~Projection} object.\n * @param {import(\"../proj.js\").ProjectionLike} destination The desired projection.  Can be a\n *     string identifier or a {@link module:ol/proj/Projection~Projection} object.\n * @return {Circle} This geometry.  Note that original geometry is\n *     modified in place.\n * @function\n * @api\n */\nCircle.prototype.transform;\nexport default Circle;\n\n//# sourceMappingURL=Circle.js.map","/**\n * @module ol/geom/MultiLineString\n */\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport GeometryLayout from './GeometryLayout.js';\nimport GeometryType from './GeometryType.js';\nimport LineString from './LineString.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {assignClosestArrayPoint, arrayMaxSquaredDelta} from './flat/closest.js';\nimport {deflateCoordinatesArray} from './flat/deflate.js';\nimport {inflateCoordinatesArray} from './flat/inflate.js';\nimport {interpolatePoint, lineStringsCoordinateAtM} from './flat/interpolate.js';\nimport {intersectsLineStringArray} from './flat/intersectsextent.js';\nimport {douglasPeuckerArray} from './flat/simplify.js';\n\n/**\n * @classdesc\n * Multi-linestring geometry.\n *\n * @api\n */\nvar MultiLineString = /*@__PURE__*/(function (SimpleGeometry) {\n  function MultiLineString(coordinates, opt_layout, opt_ends) {\n\n    SimpleGeometry.call(this);\n\n    /**\n     * @type {Array<number>}\n     * @private\n     */\n    this.ends_ = [];\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDelta_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDeltaRevision_ = -1;\n\n    if (Array.isArray(coordinates[0])) {\n      this.setCoordinates(/** @type {Array<Array<import(\"../coordinate.js\").Coordinate>>} */ (coordinates), opt_layout);\n    } else if (opt_layout !== undefined && opt_ends) {\n      this.setFlatCoordinates(opt_layout, /** @type {Array<number>} */ (coordinates));\n      this.ends_ = opt_ends;\n    } else {\n      var layout = this.getLayout();\n      var lineStrings = /** @type {Array<LineString>} */ (coordinates);\n      var flatCoordinates = [];\n      var ends = [];\n      for (var i = 0, ii = lineStrings.length; i < ii; ++i) {\n        var lineString = lineStrings[i];\n        if (i === 0) {\n          layout = lineString.getLayout();\n        }\n        extend(flatCoordinates, lineString.getFlatCoordinates());\n        ends.push(flatCoordinates.length);\n      }\n      this.setFlatCoordinates(layout, flatCoordinates);\n      this.ends_ = ends;\n    }\n\n  }\n\n  if ( SimpleGeometry ) MultiLineString.__proto__ = SimpleGeometry;\n  MultiLineString.prototype = Object.create( SimpleGeometry && SimpleGeometry.prototype );\n  MultiLineString.prototype.constructor = MultiLineString;\n\n  /**\n   * Append the passed linestring to the multilinestring.\n   * @param {LineString} lineString LineString.\n   * @api\n   */\n  MultiLineString.prototype.appendLineString = function appendLineString (lineString) {\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = lineString.getFlatCoordinates().slice();\n    } else {\n      extend(this.flatCoordinates, lineString.getFlatCoordinates().slice());\n    }\n    this.ends_.push(this.flatCoordinates.length);\n    this.changed();\n  };\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!MultiLineString} Clone.\n   * @override\n   * @api\n   */\n  MultiLineString.prototype.clone = function clone () {\n    return new MultiLineString(this.flatCoordinates.slice(), this.layout, this.ends_.slice());\n  };\n\n  /**\n   * @inheritDoc\n   */\n  MultiLineString.prototype.closestPointXY = function closestPointXY (x, y, closestPoint, minSquaredDistance) {\n    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n      return minSquaredDistance;\n    }\n    if (this.maxDeltaRevision_ != this.getRevision()) {\n      this.maxDelta_ = Math.sqrt(arrayMaxSquaredDelta(\n        this.flatCoordinates, 0, this.ends_, this.stride, 0));\n      this.maxDeltaRevision_ = this.getRevision();\n    }\n    return assignClosestArrayPoint(\n      this.flatCoordinates, 0, this.ends_, this.stride,\n      this.maxDelta_, false, x, y, closestPoint, minSquaredDistance);\n  };\n\n  /**\n   * Returns the coordinate at `m` using linear interpolation, or `null` if no\n   * such coordinate exists.\n   *\n   * `opt_extrapolate` controls extrapolation beyond the range of Ms in the\n   * MultiLineString. If `opt_extrapolate` is `true` then Ms less than the first\n   * M will return the first coordinate and Ms greater than the last M will\n   * return the last coordinate.\n   *\n   * `opt_interpolate` controls interpolation between consecutive LineStrings\n   * within the MultiLineString. If `opt_interpolate` is `true` the coordinates\n   * will be linearly interpolated between the last coordinate of one LineString\n   * and the first coordinate of the next LineString.  If `opt_interpolate` is\n   * `false` then the function will return `null` for Ms falling between\n   * LineStrings.\n   *\n   * @param {number} m M.\n   * @param {boolean=} opt_extrapolate Extrapolate. Default is `false`.\n   * @param {boolean=} opt_interpolate Interpolate. Default is `false`.\n   * @return {import(\"../coordinate.js\").Coordinate} Coordinate.\n   * @api\n   */\n  MultiLineString.prototype.getCoordinateAtM = function getCoordinateAtM (m, opt_extrapolate, opt_interpolate) {\n    if ((this.layout != GeometryLayout.XYM &&\n         this.layout != GeometryLayout.XYZM) ||\n        this.flatCoordinates.length === 0) {\n      return null;\n    }\n    var extrapolate = opt_extrapolate !== undefined ? opt_extrapolate : false;\n    var interpolate = opt_interpolate !== undefined ? opt_interpolate : false;\n    return lineStringsCoordinateAtM(this.flatCoordinates, 0,\n      this.ends_, this.stride, m, extrapolate, interpolate);\n  };\n\n  /**\n   * Return the coordinates of the multilinestring.\n   * @return {Array<Array<import(\"../coordinate.js\").Coordinate>>} Coordinates.\n   * @override\n   * @api\n   */\n  MultiLineString.prototype.getCoordinates = function getCoordinates () {\n    return inflateCoordinatesArray(\n      this.flatCoordinates, 0, this.ends_, this.stride);\n  };\n\n  /**\n   * @return {Array<number>} Ends.\n   */\n  MultiLineString.prototype.getEnds = function getEnds () {\n    return this.ends_;\n  };\n\n  /**\n   * Return the linestring at the specified index.\n   * @param {number} index Index.\n   * @return {LineString} LineString.\n   * @api\n   */\n  MultiLineString.prototype.getLineString = function getLineString (index) {\n    if (index < 0 || this.ends_.length <= index) {\n      return null;\n    }\n    return new LineString(this.flatCoordinates.slice(\n      index === 0 ? 0 : this.ends_[index - 1], this.ends_[index]), this.layout);\n  };\n\n  /**\n   * Return the linestrings of this multilinestring.\n   * @return {Array<LineString>} LineStrings.\n   * @api\n   */\n  MultiLineString.prototype.getLineStrings = function getLineStrings () {\n    var flatCoordinates = this.flatCoordinates;\n    var ends = this.ends_;\n    var layout = this.layout;\n    /** @type {Array<LineString>} */\n    var lineStrings = [];\n    var offset = 0;\n    for (var i = 0, ii = ends.length; i < ii; ++i) {\n      var end = ends[i];\n      var lineString = new LineString(flatCoordinates.slice(offset, end), layout);\n      lineStrings.push(lineString);\n      offset = end;\n    }\n    return lineStrings;\n  };\n\n  /**\n   * @return {Array<number>} Flat midpoints.\n   */\n  MultiLineString.prototype.getFlatMidpoints = function getFlatMidpoints () {\n    var midpoints = [];\n    var flatCoordinates = this.flatCoordinates;\n    var offset = 0;\n    var ends = this.ends_;\n    var stride = this.stride;\n    for (var i = 0, ii = ends.length; i < ii; ++i) {\n      var end = ends[i];\n      var midpoint = interpolatePoint(\n        flatCoordinates, offset, end, stride, 0.5);\n      extend(midpoints, midpoint);\n      offset = end;\n    }\n    return midpoints;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  MultiLineString.prototype.getSimplifiedGeometryInternal = function getSimplifiedGeometryInternal (squaredTolerance) {\n    var simplifiedFlatCoordinates = [];\n    var simplifiedEnds = [];\n    simplifiedFlatCoordinates.length = douglasPeuckerArray(\n      this.flatCoordinates, 0, this.ends_, this.stride, squaredTolerance,\n      simplifiedFlatCoordinates, 0, simplifiedEnds);\n    return new MultiLineString(simplifiedFlatCoordinates, GeometryLayout.XY, simplifiedEnds);\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  MultiLineString.prototype.getType = function getType () {\n    return GeometryType.MULTI_LINE_STRING;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  MultiLineString.prototype.intersectsExtent = function intersectsExtent (extent) {\n    return intersectsLineStringArray(\n      this.flatCoordinates, 0, this.ends_, this.stride, extent);\n  };\n\n  /**\n   * Set the coordinates of the multilinestring.\n   * @param {!Array<Array<import(\"../coordinate.js\").Coordinate>>} coordinates Coordinates.\n   * @param {GeometryLayout=} opt_layout Layout.\n   * @override\n   * @api\n   */\n  MultiLineString.prototype.setCoordinates = function setCoordinates (coordinates, opt_layout) {\n    this.setLayout(opt_layout, coordinates, 2);\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = [];\n    }\n    var ends = deflateCoordinatesArray(\n      this.flatCoordinates, 0, coordinates, this.stride, this.ends_);\n    this.flatCoordinates.length = ends.length === 0 ? 0 : ends[ends.length - 1];\n    this.changed();\n  };\n\n  return MultiLineString;\n}(SimpleGeometry));\n\n\nexport default MultiLineString;\n\n//# sourceMappingURL=MultiLineString.js.map","/**\n * @module ol/geom/MultiPoint\n */\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY, containsXY} from '../extent.js';\nimport GeometryType from './GeometryType.js';\nimport Point from './Point.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {deflateCoordinates} from './flat/deflate.js';\nimport {inflateCoordinates} from './flat/inflate.js';\nimport {squaredDistance as squaredDx} from '../math.js';\n\n/**\n * @classdesc\n * Multi-point geometry.\n *\n * @api\n */\nvar MultiPoint = /*@__PURE__*/(function (SimpleGeometry) {\n  function MultiPoint(coordinates, opt_layout) {\n    SimpleGeometry.call(this);\n    if (opt_layout && !Array.isArray(coordinates[0])) {\n      this.setFlatCoordinates(opt_layout, /** @type {Array<number>} */ (coordinates));\n    } else {\n      this.setCoordinates(/** @type {Array<import(\"../coordinate.js\").Coordinate>} */ (coordinates), opt_layout);\n    }\n  }\n\n  if ( SimpleGeometry ) MultiPoint.__proto__ = SimpleGeometry;\n  MultiPoint.prototype = Object.create( SimpleGeometry && SimpleGeometry.prototype );\n  MultiPoint.prototype.constructor = MultiPoint;\n\n  /**\n   * Append the passed point to this multipoint.\n   * @param {Point} point Point.\n   * @api\n   */\n  MultiPoint.prototype.appendPoint = function appendPoint (point) {\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = point.getFlatCoordinates().slice();\n    } else {\n      extend(this.flatCoordinates, point.getFlatCoordinates());\n    }\n    this.changed();\n  };\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!MultiPoint} Clone.\n   * @override\n   * @api\n   */\n  MultiPoint.prototype.clone = function clone () {\n    var multiPoint = new MultiPoint(this.flatCoordinates.slice(), this.layout);\n    return multiPoint;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  MultiPoint.prototype.closestPointXY = function closestPointXY (x, y, closestPoint, minSquaredDistance) {\n    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n      return minSquaredDistance;\n    }\n    var flatCoordinates = this.flatCoordinates;\n    var stride = this.stride;\n    for (var i = 0, ii = flatCoordinates.length; i < ii; i += stride) {\n      var squaredDistance = squaredDx(\n        x, y, flatCoordinates[i], flatCoordinates[i + 1]);\n      if (squaredDistance < minSquaredDistance) {\n        minSquaredDistance = squaredDistance;\n        for (var j = 0; j < stride; ++j) {\n          closestPoint[j] = flatCoordinates[i + j];\n        }\n        closestPoint.length = stride;\n      }\n    }\n    return minSquaredDistance;\n  };\n\n  /**\n   * Return the coordinates of the multipoint.\n   * @return {Array<import(\"../coordinate.js\").Coordinate>} Coordinates.\n   * @override\n   * @api\n   */\n  MultiPoint.prototype.getCoordinates = function getCoordinates () {\n    return inflateCoordinates(\n      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);\n  };\n\n  /**\n   * Return the point at the specified index.\n   * @param {number} index Index.\n   * @return {Point} Point.\n   * @api\n   */\n  MultiPoint.prototype.getPoint = function getPoint (index) {\n    var n = !this.flatCoordinates ? 0 : this.flatCoordinates.length / this.stride;\n    if (index < 0 || n <= index) {\n      return null;\n    }\n    return new Point(this.flatCoordinates.slice(\n      index * this.stride, (index + 1) * this.stride), this.layout);\n  };\n\n  /**\n   * Return the points of this multipoint.\n   * @return {Array<Point>} Points.\n   * @api\n   */\n  MultiPoint.prototype.getPoints = function getPoints () {\n    var flatCoordinates = this.flatCoordinates;\n    var layout = this.layout;\n    var stride = this.stride;\n    /** @type {Array<Point>} */\n    var points = [];\n    for (var i = 0, ii = flatCoordinates.length; i < ii; i += stride) {\n      var point = new Point(flatCoordinates.slice(i, i + stride), layout);\n      points.push(point);\n    }\n    return points;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  MultiPoint.prototype.getType = function getType () {\n    return GeometryType.MULTI_POINT;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  MultiPoint.prototype.intersectsExtent = function intersectsExtent (extent) {\n    var flatCoordinates = this.flatCoordinates;\n    var stride = this.stride;\n    for (var i = 0, ii = flatCoordinates.length; i < ii; i += stride) {\n      var x = flatCoordinates[i];\n      var y = flatCoordinates[i + 1];\n      if (containsXY(extent, x, y)) {\n        return true;\n      }\n    }\n    return false;\n  };\n\n  /**\n   * Set the coordinates of the multipoint.\n   * @param {!Array<import(\"../coordinate.js\").Coordinate>} coordinates Coordinates.\n   * @param {import(\"./GeometryLayout.js\").default=} opt_layout Layout.\n   * @override\n   * @api\n   */\n  MultiPoint.prototype.setCoordinates = function setCoordinates (coordinates, opt_layout) {\n    this.setLayout(opt_layout, coordinates, 1);\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = [];\n    }\n    this.flatCoordinates.length = deflateCoordinates(\n      this.flatCoordinates, 0, coordinates, this.stride);\n    this.changed();\n  };\n\n  return MultiPoint;\n}(SimpleGeometry));\n\n\nexport default MultiPoint;\n\n//# sourceMappingURL=MultiPoint.js.map","/**\n * @module ol/geom/flat/center\n */\nimport {createEmpty, createOrUpdateFromFlatCoordinates} from '../../extent.js';\n\n\n/**\n * @param {Array<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array<Array<number>>} endss Endss.\n * @param {number} stride Stride.\n * @return {Array<number>} Flat centers.\n */\nexport function linearRingss(flatCoordinates, offset, endss, stride) {\n  var flatCenters = [];\n  var extent = createEmpty();\n  for (var i = 0, ii = endss.length; i < ii; ++i) {\n    var ends = endss[i];\n    extent = createOrUpdateFromFlatCoordinates(flatCoordinates, offset, ends[0], stride);\n    flatCenters.push((extent[0] + extent[2]) / 2, (extent[1] + extent[3]) / 2);\n    offset = ends[ends.length - 1];\n  }\n  return flatCenters;\n}\n\n//# sourceMappingURL=center.js.map","/**\n * @module ol/geom/MultiPolygon\n */\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport GeometryLayout from './GeometryLayout.js';\nimport GeometryType from './GeometryType.js';\nimport MultiPoint from './MultiPoint.js';\nimport Polygon from './Polygon.js';\nimport SimpleGeometry from './SimpleGeometry.js';\nimport {linearRingss as linearRingssArea} from './flat/area.js';\nimport {linearRingss as linearRingssCenter} from './flat/center.js';\nimport {assignClosestMultiArrayPoint, multiArrayMaxSquaredDelta} from './flat/closest.js';\nimport {linearRingssContainsXY} from './flat/contains.js';\nimport {deflateMultiCoordinatesArray} from './flat/deflate.js';\nimport {inflateMultiCoordinatesArray} from './flat/inflate.js';\nimport {getInteriorPointsOfMultiArray} from './flat/interiorpoint.js';\nimport {intersectsLinearRingMultiArray} from './flat/intersectsextent.js';\nimport {linearRingsAreOriented, orientLinearRingsArray} from './flat/orient.js';\nimport {quantizeMultiArray} from './flat/simplify.js';\n\n/**\n * @classdesc\n * Multi-polygon geometry.\n *\n * @api\n */\nvar MultiPolygon = /*@__PURE__*/(function (SimpleGeometry) {\n  function MultiPolygon(coordinates, opt_layout, opt_endss) {\n\n    SimpleGeometry.call(this);\n\n    /**\n     * @type {Array<Array<number>>}\n     * @private\n     */\n    this.endss_ = [];\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.flatInteriorPointsRevision_ = -1;\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.flatInteriorPoints_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDelta_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.maxDeltaRevision_ = -1;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.orientedRevision_ = -1;\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.orientedFlatCoordinates_ = null;\n\n    if (!opt_endss && !Array.isArray(coordinates[0])) {\n      var layout = this.getLayout();\n      var polygons = /** @type {Array<Polygon>} */ (coordinates);\n      var flatCoordinates = [];\n      var endss = [];\n      for (var i = 0, ii = polygons.length; i < ii; ++i) {\n        var polygon = polygons[i];\n        if (i === 0) {\n          layout = polygon.getLayout();\n        }\n        var offset = flatCoordinates.length;\n        var ends = polygon.getEnds();\n        for (var j = 0, jj = ends.length; j < jj; ++j) {\n          ends[j] += offset;\n        }\n        extend(flatCoordinates, polygon.getFlatCoordinates());\n        endss.push(ends);\n      }\n      opt_layout = layout;\n      coordinates = flatCoordinates;\n      opt_endss = endss;\n    }\n    if (opt_layout !== undefined && opt_endss) {\n      this.setFlatCoordinates(opt_layout, /** @type {Array<number>} */ (coordinates));\n      this.endss_ = opt_endss;\n    } else {\n      this.setCoordinates(/** @type {Array<Array<Array<import(\"../coordinate.js\").Coordinate>>>} */ (coordinates),\n        opt_layout);\n    }\n\n  }\n\n  if ( SimpleGeometry ) MultiPolygon.__proto__ = SimpleGeometry;\n  MultiPolygon.prototype = Object.create( SimpleGeometry && SimpleGeometry.prototype );\n  MultiPolygon.prototype.constructor = MultiPolygon;\n\n  /**\n   * Append the passed polygon to this multipolygon.\n   * @param {Polygon} polygon Polygon.\n   * @api\n   */\n  MultiPolygon.prototype.appendPolygon = function appendPolygon (polygon) {\n    /** @type {Array<number>} */\n    var ends;\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = polygon.getFlatCoordinates().slice();\n      ends = polygon.getEnds().slice();\n      this.endss_.push();\n    } else {\n      var offset = this.flatCoordinates.length;\n      extend(this.flatCoordinates, polygon.getFlatCoordinates());\n      ends = polygon.getEnds().slice();\n      for (var i = 0, ii = ends.length; i < ii; ++i) {\n        ends[i] += offset;\n      }\n    }\n    this.endss_.push(ends);\n    this.changed();\n  };\n\n  /**\n   * Make a complete copy of the geometry.\n   * @return {!MultiPolygon} Clone.\n   * @override\n   * @api\n   */\n  MultiPolygon.prototype.clone = function clone () {\n    var len = this.endss_.length;\n    var newEndss = new Array(len);\n    for (var i = 0; i < len; ++i) {\n      newEndss[i] = this.endss_[i].slice();\n    }\n\n    return new MultiPolygon(\n      this.flatCoordinates.slice(), this.layout, newEndss);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  MultiPolygon.prototype.closestPointXY = function closestPointXY (x, y, closestPoint, minSquaredDistance) {\n    if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n      return minSquaredDistance;\n    }\n    if (this.maxDeltaRevision_ != this.getRevision()) {\n      this.maxDelta_ = Math.sqrt(multiArrayMaxSquaredDelta(\n        this.flatCoordinates, 0, this.endss_, this.stride, 0));\n      this.maxDeltaRevision_ = this.getRevision();\n    }\n    return assignClosestMultiArrayPoint(\n      this.getOrientedFlatCoordinates(), 0, this.endss_, this.stride,\n      this.maxDelta_, true, x, y, closestPoint, minSquaredDistance);\n  };\n\n  /**\n   * @inheritDoc\n   */\n  MultiPolygon.prototype.containsXY = function containsXY (x, y) {\n    return linearRingssContainsXY(this.getOrientedFlatCoordinates(), 0, this.endss_, this.stride, x, y);\n  };\n\n  /**\n   * Return the area of the multipolygon on projected plane.\n   * @return {number} Area (on projected plane).\n   * @api\n   */\n  MultiPolygon.prototype.getArea = function getArea () {\n    return linearRingssArea(this.getOrientedFlatCoordinates(), 0, this.endss_, this.stride);\n  };\n\n  /**\n   * Get the coordinate array for this geometry.  This array has the structure\n   * of a GeoJSON coordinate array for multi-polygons.\n   *\n   * @param {boolean=} opt_right Orient coordinates according to the right-hand\n   *     rule (counter-clockwise for exterior and clockwise for interior rings).\n   *     If `false`, coordinates will be oriented according to the left-hand rule\n   *     (clockwise for exterior and counter-clockwise for interior rings).\n   *     By default, coordinate orientation will depend on how the geometry was\n   *     constructed.\n   * @return {Array<Array<Array<import(\"../coordinate.js\").Coordinate>>>} Coordinates.\n   * @override\n   * @api\n   */\n  MultiPolygon.prototype.getCoordinates = function getCoordinates (opt_right) {\n    var flatCoordinates;\n    if (opt_right !== undefined) {\n      flatCoordinates = this.getOrientedFlatCoordinates().slice();\n      orientLinearRingsArray(\n        flatCoordinates, 0, this.endss_, this.stride, opt_right);\n    } else {\n      flatCoordinates = this.flatCoordinates;\n    }\n\n    return inflateMultiCoordinatesArray(\n      flatCoordinates, 0, this.endss_, this.stride);\n  };\n\n  /**\n   * @return {Array<Array<number>>} Endss.\n   */\n  MultiPolygon.prototype.getEndss = function getEndss () {\n    return this.endss_;\n  };\n\n  /**\n   * @return {Array<number>} Flat interior points.\n   */\n  MultiPolygon.prototype.getFlatInteriorPoints = function getFlatInteriorPoints () {\n    if (this.flatInteriorPointsRevision_ != this.getRevision()) {\n      var flatCenters = linearRingssCenter(\n        this.flatCoordinates, 0, this.endss_, this.stride);\n      this.flatInteriorPoints_ = getInteriorPointsOfMultiArray(\n        this.getOrientedFlatCoordinates(), 0, this.endss_, this.stride,\n        flatCenters);\n      this.flatInteriorPointsRevision_ = this.getRevision();\n    }\n    return this.flatInteriorPoints_;\n  };\n\n  /**\n   * Return the interior points as {@link module:ol/geom/MultiPoint multipoint}.\n   * @return {MultiPoint} Interior points as XYM coordinates, where M is\n   * the length of the horizontal intersection that the point belongs to.\n   * @api\n   */\n  MultiPolygon.prototype.getInteriorPoints = function getInteriorPoints () {\n    return new MultiPoint(this.getFlatInteriorPoints().slice(), GeometryLayout.XYM);\n  };\n\n  /**\n   * @return {Array<number>} Oriented flat coordinates.\n   */\n  MultiPolygon.prototype.getOrientedFlatCoordinates = function getOrientedFlatCoordinates () {\n    if (this.orientedRevision_ != this.getRevision()) {\n      var flatCoordinates = this.flatCoordinates;\n      if (linearRingsAreOriented(\n        flatCoordinates, 0, this.endss_, this.stride)) {\n        this.orientedFlatCoordinates_ = flatCoordinates;\n      } else {\n        this.orientedFlatCoordinates_ = flatCoordinates.slice();\n        this.orientedFlatCoordinates_.length =\n            orientLinearRingsArray(\n              this.orientedFlatCoordinates_, 0, this.endss_, this.stride);\n      }\n      this.orientedRevision_ = this.getRevision();\n    }\n    return this.orientedFlatCoordinates_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  MultiPolygon.prototype.getSimplifiedGeometryInternal = function getSimplifiedGeometryInternal (squaredTolerance) {\n    var simplifiedFlatCoordinates = [];\n    var simplifiedEndss = [];\n    simplifiedFlatCoordinates.length = quantizeMultiArray(\n      this.flatCoordinates, 0, this.endss_, this.stride,\n      Math.sqrt(squaredTolerance),\n      simplifiedFlatCoordinates, 0, simplifiedEndss);\n    return new MultiPolygon(simplifiedFlatCoordinates, GeometryLayout.XY, simplifiedEndss);\n  };\n\n  /**\n   * Return the polygon at the specified index.\n   * @param {number} index Index.\n   * @return {Polygon} Polygon.\n   * @api\n   */\n  MultiPolygon.prototype.getPolygon = function getPolygon (index) {\n    if (index < 0 || this.endss_.length <= index) {\n      return null;\n    }\n    var offset;\n    if (index === 0) {\n      offset = 0;\n    } else {\n      var prevEnds = this.endss_[index - 1];\n      offset = prevEnds[prevEnds.length - 1];\n    }\n    var ends = this.endss_[index].slice();\n    var end = ends[ends.length - 1];\n    if (offset !== 0) {\n      for (var i = 0, ii = ends.length; i < ii; ++i) {\n        ends[i] -= offset;\n      }\n    }\n    return new Polygon(this.flatCoordinates.slice(offset, end), this.layout, ends);\n  };\n\n  /**\n   * Return the polygons of this multipolygon.\n   * @return {Array<Polygon>} Polygons.\n   * @api\n   */\n  MultiPolygon.prototype.getPolygons = function getPolygons () {\n    var layout = this.layout;\n    var flatCoordinates = this.flatCoordinates;\n    var endss = this.endss_;\n    var polygons = [];\n    var offset = 0;\n    for (var i = 0, ii = endss.length; i < ii; ++i) {\n      var ends = endss[i].slice();\n      var end = ends[ends.length - 1];\n      if (offset !== 0) {\n        for (var j = 0, jj = ends.length; j < jj; ++j) {\n          ends[j] -= offset;\n        }\n      }\n      var polygon = new Polygon(flatCoordinates.slice(offset, end), layout, ends);\n      polygons.push(polygon);\n      offset = end;\n    }\n    return polygons;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  MultiPolygon.prototype.getType = function getType () {\n    return GeometryType.MULTI_POLYGON;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  MultiPolygon.prototype.intersectsExtent = function intersectsExtent (extent) {\n    return intersectsLinearRingMultiArray(\n      this.getOrientedFlatCoordinates(), 0, this.endss_, this.stride, extent);\n  };\n\n  /**\n   * Set the coordinates of the multipolygon.\n   * @param {!Array<Array<Array<import(\"../coordinate.js\").Coordinate>>>} coordinates Coordinates.\n   * @param {GeometryLayout=} opt_layout Layout.\n   * @override\n   * @api\n   */\n  MultiPolygon.prototype.setCoordinates = function setCoordinates (coordinates, opt_layout) {\n    this.setLayout(opt_layout, coordinates, 3);\n    if (!this.flatCoordinates) {\n      this.flatCoordinates = [];\n    }\n    var endss = deflateMultiCoordinatesArray(\n      this.flatCoordinates, 0, coordinates, this.stride, this.endss_);\n    if (endss.length === 0) {\n      this.flatCoordinates.length = 0;\n    } else {\n      var lastEnds = endss[endss.length - 1];\n      this.flatCoordinates.length = lastEnds.length === 0 ?\n        0 : lastEnds[lastEnds.length - 1];\n    }\n    this.changed();\n  };\n\n  return MultiPolygon;\n}(SimpleGeometry));\n\n\nexport default MultiPolygon;\n\n//# sourceMappingURL=MultiPolygon.js.map","/**\n * @module ol/style/Image\n */\nimport {abstract} from '../util.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} opacity\n * @property {boolean} rotateWithView\n * @property {number} rotation\n * @property {number} scale\n */\n\n\n/**\n * @classdesc\n * A base class used for creating subclasses and not instantiated in\n * apps. Base class for {@link module:ol/style/Icon~Icon}, {@link module:ol/style/Circle~CircleStyle} and\n * {@link module:ol/style/RegularShape~RegularShape}.\n * @abstract\n * @api\n */\nvar ImageStyle = function ImageStyle(options) {\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.opacity_ = options.opacity;\n\n  /**\n   * @private\n   * @type {boolean}\n   */\n  this.rotateWithView_ = options.rotateWithView;\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.rotation_ = options.rotation;\n\n  /**\n   * @private\n   * @type {number}\n   */\n  this.scale_ = options.scale;\n\n};\n\n/**\n * Clones the style.\n * @return {ImageStyle} The cloned style.\n * @api\n */\nImageStyle.prototype.clone = function clone () {\n  return new ImageStyle({\n    opacity: this.getOpacity(),\n    scale: this.getScale(),\n    rotation: this.getRotation(),\n    rotateWithView: this.getRotateWithView()\n  });\n};\n\n/**\n * Get the symbolizer opacity.\n * @return {number} Opacity.\n * @api\n */\nImageStyle.prototype.getOpacity = function getOpacity () {\n  return this.opacity_;\n};\n\n/**\n * Determine whether the symbolizer rotates with the map.\n * @return {boolean} Rotate with map.\n * @api\n */\nImageStyle.prototype.getRotateWithView = function getRotateWithView () {\n  return this.rotateWithView_;\n};\n\n/**\n * Get the symoblizer rotation.\n * @return {number} Rotation.\n * @api\n */\nImageStyle.prototype.getRotation = function getRotation () {\n  return this.rotation_;\n};\n\n/**\n * Get the symbolizer scale.\n * @return {number} Scale.\n * @api\n */\nImageStyle.prototype.getScale = function getScale () {\n  return this.scale_;\n};\n\n/**\n * This method is deprecated and always returns false.\n * @return {boolean} false.\n * @deprecated\n * @api\n */\nImageStyle.prototype.getSnapToPixel = function getSnapToPixel () {\n  return false;\n};\n\n/**\n * Get the anchor point in pixels. The anchor determines the center point for the\n * symbolizer.\n * @abstract\n * @return {Array<number>} Anchor.\n */\nImageStyle.prototype.getAnchor = function getAnchor () {\n  return abstract();\n};\n\n/**\n * Get the image element for the symbolizer.\n * @abstract\n * @param {number} pixelRatio Pixel ratio.\n * @return {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement} Image element.\n */\nImageStyle.prototype.getImage = function getImage (pixelRatio) {\n  return abstract();\n};\n\n/**\n * @abstract\n * @param {number} pixelRatio Pixel ratio.\n * @return {HTMLCanvasElement|HTMLVideoElement|HTMLImageElement} Image element.\n */\nImageStyle.prototype.getHitDetectionImage = function getHitDetectionImage (pixelRatio) {\n  return abstract();\n};\n\n/**\n * @abstract\n * @return {import(\"../ImageState.js\").default} Image state.\n */\nImageStyle.prototype.getImageState = function getImageState () {\n  return abstract();\n};\n\n/**\n * @abstract\n * @return {import(\"../size.js\").Size} Image size.\n */\nImageStyle.prototype.getImageSize = function getImageSize () {\n  return abstract();\n};\n\n/**\n * @abstract\n * @return {import(\"../size.js\").Size} Size of the hit-detection image.\n */\nImageStyle.prototype.getHitDetectionImageSize = function getHitDetectionImageSize () {\n  return abstract();\n};\n\n/**\n * Get the origin of the symbolizer.\n * @abstract\n * @return {Array<number>} Origin.\n */\nImageStyle.prototype.getOrigin = function getOrigin () {\n  return abstract();\n};\n\n/**\n * Get the size of the symbolizer (in pixels).\n * @abstract\n * @return {import(\"../size.js\").Size} Size.\n */\nImageStyle.prototype.getSize = function getSize () {\n  return abstract();\n};\n\n/**\n * Set the opacity.\n *\n * @param {number} opacity Opacity.\n * @api\n */\nImageStyle.prototype.setOpacity = function setOpacity (opacity) {\n  this.opacity_ = opacity;\n};\n\n/**\n * Set whether to rotate the style with the view.\n *\n * @param {boolean} rotateWithView Rotate with map.\n * @api\n */\nImageStyle.prototype.setRotateWithView = function setRotateWithView (rotateWithView) {\n  this.rotateWithView_ = rotateWithView;\n};\n\n/**\n * Set the rotation.\n *\n * @param {number} rotation Rotation.\n * @api\n */\nImageStyle.prototype.setRotation = function setRotation (rotation) {\n  this.rotation_ = rotation;\n};\n/**\n * Set the scale.\n *\n * @param {number} scale Scale.\n * @api\n */\nImageStyle.prototype.setScale = function setScale (scale) {\n  this.scale_ = scale;\n};\n\n/**\n * This method is deprecated and does nothing.\n * @param {boolean} snapToPixel Snap to pixel?\n * @deprecated\n * @api\n */\nImageStyle.prototype.setSnapToPixel = function setSnapToPixel (snapToPixel) {};\n\n/**\n * @abstract\n * @param {function(this: T, import(\"../events/Event.js\").default)} listener Listener function.\n * @param {T} thisArg Value to use as `this` when executing `listener`.\n * @return {import(\"../events.js\").EventsKey|undefined} Listener key.\n * @template T\n */\nImageStyle.prototype.listenImageChange = function listenImageChange (listener, thisArg) {\n  return abstract();\n};\n\n/**\n * Load not yet loaded URI.\n * @abstract\n */\nImageStyle.prototype.load = function load () {\n  abstract();\n};\n\n/**\n * @abstract\n * @param {function(this: T, import(\"../events/Event.js\").default)} listener Listener function.\n * @param {T} thisArg Value to use as `this` when executing `listener`.\n * @template T\n */\nImageStyle.prototype.unlistenImageChange = function unlistenImageChange (listener, thisArg) {\n  abstract();\n};\n\nexport default ImageStyle;\n\n//# sourceMappingURL=Image.js.map","/**\n * @module ol/style/RegularShape\n */\n\nimport {asString} from '../color.js';\nimport {asColorLike} from '../colorlike.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {CANVAS_LINE_DASH} from '../has.js';\nimport ImageState from '../ImageState.js';\nimport {defaultStrokeStyle, defaultFillStyle, defaultLineCap, defaultLineWidth, defaultLineJoin, defaultMiterLimit} from '../render/canvas.js';\nimport ImageStyle from './Image.js';\n\n\n/**\n * Specify radius for regular polygons, or radius1 and radius2 for stars.\n * @typedef {Object} Options\n * @property {import(\"./Fill.js\").default} [fill] Fill style.\n * @property {number} points Number of points for stars and regular polygons. In case of a polygon, the number of points\n * is the number of sides.\n * @property {number} [radius] Radius of a regular polygon.\n * @property {number} [radius1] Outer radius of a star.\n * @property {number} [radius2] Inner radius of a star.\n * @property {number} [angle=0] Shape's angle in radians. A value of 0 will have one of the shape's point facing up.\n * @property {import(\"./Stroke.js\").default} [stroke] Stroke style.\n * @property {number} [rotation=0] Rotation in radians (positive rotation clockwise).\n * @property {boolean} [rotateWithView=false] Whether to rotate the shape with the view.\n * @property {import(\"./AtlasManager.js\").default} [atlasManager] The atlas manager to use for this symbol. When\n * using WebGL it is recommended to use an atlas manager to avoid texture switching. If an atlas manager is given, the\n * symbol is added to an atlas. By default no atlas manager is used.\n */\n\n\n/**\n * @typedef {Object} RenderOptions\n * @property {import(\"../colorlike.js\").ColorLike} [strokeStyle]\n * @property {number} strokeWidth\n * @property {number} size\n * @property {string} lineCap\n * @property {Array<number>} lineDash\n * @property {number} lineDashOffset\n * @property {string} lineJoin\n * @property {number} miterLimit\n */\n\n\n/**\n * @classdesc\n * Set regular shape style for vector features. The resulting shape will be\n * a regular polygon when `radius` is provided, or a star when `radius1` and\n * `radius2` are provided.\n * @api\n */\nvar RegularShape = /*@__PURE__*/(function (ImageStyle) {\n  function RegularShape(options) {\n    /**\n     * @type {boolean}\n     */\n    var rotateWithView = options.rotateWithView !== undefined ?\n      options.rotateWithView : false;\n\n    ImageStyle.call(this, {\n      opacity: 1,\n      rotateWithView: rotateWithView,\n      rotation: options.rotation !== undefined ? options.rotation : 0,\n      scale: 1\n    });\n\n    /**\n     * @private\n     * @type {Array<string|number>}\n     */\n    this.checksums_ = null;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.canvas_ = null;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.hitDetectionCanvas_ = null;\n\n    /**\n     * @private\n     * @type {import(\"./Fill.js\").default}\n     */\n    this.fill_ = options.fill !== undefined ? options.fill : null;\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.origin_ = [0, 0];\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.points_ = options.points;\n\n    /**\n     * @protected\n     * @type {number}\n     */\n    this.radius_ = /** @type {number} */ (options.radius !== undefined ?\n      options.radius : options.radius1);\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.radius2_ = options.radius2;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.angle_ = options.angle !== undefined ? options.angle : 0;\n\n    /**\n     * @private\n     * @type {import(\"./Stroke.js\").default}\n     */\n    this.stroke_ = options.stroke !== undefined ? options.stroke : null;\n\n    /**\n     * @private\n     * @type {Array<number>}\n     */\n    this.anchor_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../size.js\").Size}\n     */\n    this.size_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../size.js\").Size}\n     */\n    this.imageSize_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../size.js\").Size}\n     */\n    this.hitDetectionImageSize_ = null;\n\n    /**\n     * @protected\n     * @type {import(\"./AtlasManager.js\").default|undefined}\n     */\n    this.atlasManager_ = options.atlasManager;\n\n    this.render_(this.atlasManager_);\n\n  }\n\n  if ( ImageStyle ) RegularShape.__proto__ = ImageStyle;\n  RegularShape.prototype = Object.create( ImageStyle && ImageStyle.prototype );\n  RegularShape.prototype.constructor = RegularShape;\n\n  /**\n   * Clones the style. If an atlasmanager was provided to the original style it will be used in the cloned style, too.\n   * @return {RegularShape} The cloned style.\n   * @api\n   */\n  RegularShape.prototype.clone = function clone () {\n    var style = new RegularShape({\n      fill: this.getFill() ? this.getFill().clone() : undefined,\n      points: this.getPoints(),\n      radius: this.getRadius(),\n      radius2: this.getRadius2(),\n      angle: this.getAngle(),\n      stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n      rotation: this.getRotation(),\n      rotateWithView: this.getRotateWithView(),\n      atlasManager: this.atlasManager_\n    });\n    style.setOpacity(this.getOpacity());\n    style.setScale(this.getScale());\n    return style;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  RegularShape.prototype.getAnchor = function getAnchor () {\n    return this.anchor_;\n  };\n\n  /**\n   * Get the angle used in generating the shape.\n   * @return {number} Shape's rotation in radians.\n   * @api\n   */\n  RegularShape.prototype.getAngle = function getAngle () {\n    return this.angle_;\n  };\n\n  /**\n   * Get the fill style for the shape.\n   * @return {import(\"./Fill.js\").default} Fill style.\n   * @api\n   */\n  RegularShape.prototype.getFill = function getFill () {\n    return this.fill_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  RegularShape.prototype.getHitDetectionImage = function getHitDetectionImage (pixelRatio) {\n    return this.hitDetectionCanvas_;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  RegularShape.prototype.getImage = function getImage (pixelRatio) {\n    return this.canvas_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  RegularShape.prototype.getImageSize = function getImageSize () {\n    return this.imageSize_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  RegularShape.prototype.getHitDetectionImageSize = function getHitDetectionImageSize () {\n    return this.hitDetectionImageSize_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  RegularShape.prototype.getImageState = function getImageState () {\n    return ImageState.LOADED;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  RegularShape.prototype.getOrigin = function getOrigin () {\n    return this.origin_;\n  };\n\n  /**\n   * Get the number of points for generating the shape.\n   * @return {number} Number of points for stars and regular polygons.\n   * @api\n   */\n  RegularShape.prototype.getPoints = function getPoints () {\n    return this.points_;\n  };\n\n  /**\n   * Get the (primary) radius for the shape.\n   * @return {number} Radius.\n   * @api\n   */\n  RegularShape.prototype.getRadius = function getRadius () {\n    return this.radius_;\n  };\n\n  /**\n   * Get the secondary radius for the shape.\n   * @return {number|undefined} Radius2.\n   * @api\n   */\n  RegularShape.prototype.getRadius2 = function getRadius2 () {\n    return this.radius2_;\n  };\n\n  /**\n   * @inheritDoc\n   * @api\n   */\n  RegularShape.prototype.getSize = function getSize () {\n    return this.size_;\n  };\n\n  /**\n   * Get the stroke style for the shape.\n   * @return {import(\"./Stroke.js\").default} Stroke style.\n   * @api\n   */\n  RegularShape.prototype.getStroke = function getStroke () {\n    return this.stroke_;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  RegularShape.prototype.listenImageChange = function listenImageChange (listener, thisArg) {\n    return undefined;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  RegularShape.prototype.load = function load () {};\n\n  /**\n   * @inheritDoc\n   */\n  RegularShape.prototype.unlistenImageChange = function unlistenImageChange (listener, thisArg) {};\n\n  /**\n   * @protected\n   * @param {import(\"./AtlasManager.js\").default|undefined} atlasManager An atlas manager.\n   */\n  RegularShape.prototype.render_ = function render_ (atlasManager) {\n    var imageSize;\n    var lineCap = '';\n    var lineJoin = '';\n    var miterLimit = 0;\n    var lineDash = null;\n    var lineDashOffset = 0;\n    var strokeStyle;\n    var strokeWidth = 0;\n\n    if (this.stroke_) {\n      strokeStyle = this.stroke_.getColor();\n      if (strokeStyle === null) {\n        strokeStyle = defaultStrokeStyle;\n      }\n      strokeStyle = asColorLike(strokeStyle);\n      strokeWidth = this.stroke_.getWidth();\n      if (strokeWidth === undefined) {\n        strokeWidth = defaultLineWidth;\n      }\n      lineDash = this.stroke_.getLineDash();\n      lineDashOffset = this.stroke_.getLineDashOffset();\n      if (!CANVAS_LINE_DASH) {\n        lineDash = null;\n        lineDashOffset = 0;\n      }\n      lineJoin = this.stroke_.getLineJoin();\n      if (lineJoin === undefined) {\n        lineJoin = defaultLineJoin;\n      }\n      lineCap = this.stroke_.getLineCap();\n      if (lineCap === undefined) {\n        lineCap = defaultLineCap;\n      }\n      miterLimit = this.stroke_.getMiterLimit();\n      if (miterLimit === undefined) {\n        miterLimit = defaultMiterLimit;\n      }\n    }\n\n    var size = 2 * (this.radius_ + strokeWidth) + 1;\n\n    /** @type {RenderOptions} */\n    var renderOptions = {\n      strokeStyle: strokeStyle,\n      strokeWidth: strokeWidth,\n      size: size,\n      lineCap: lineCap,\n      lineDash: lineDash,\n      lineDashOffset: lineDashOffset,\n      lineJoin: lineJoin,\n      miterLimit: miterLimit\n    };\n\n    if (atlasManager === undefined) {\n      // no atlas manager is used, create a new canvas\n      var context = createCanvasContext2D(size, size);\n      this.canvas_ = context.canvas;\n\n      // canvas.width and height are rounded to the closest integer\n      size = this.canvas_.width;\n      imageSize = size;\n\n      this.draw_(renderOptions, context, 0, 0);\n\n      this.createHitDetectionCanvas_(renderOptions);\n    } else {\n      // an atlas manager is used, add the symbol to an atlas\n      size = Math.round(size);\n\n      var hasCustomHitDetectionImage = !this.fill_;\n      var renderHitDetectionCallback;\n      if (hasCustomHitDetectionImage) {\n        // render the hit-detection image into a separate atlas image\n        renderHitDetectionCallback =\n            this.drawHitDetectionCanvas_.bind(this, renderOptions);\n      }\n\n      var id = this.getChecksum();\n      var info = atlasManager.add(\n        id, size, size, this.draw_.bind(this, renderOptions),\n        renderHitDetectionCallback);\n\n      this.canvas_ = info.image;\n      this.origin_ = [info.offsetX, info.offsetY];\n      imageSize = info.image.width;\n\n      if (hasCustomHitDetectionImage) {\n        this.hitDetectionCanvas_ = info.hitImage;\n        this.hitDetectionImageSize_ =\n            [info.hitImage.width, info.hitImage.height];\n      } else {\n        this.hitDetectionCanvas_ = this.canvas_;\n        this.hitDetectionImageSize_ = [imageSize, imageSize];\n      }\n    }\n\n    this.anchor_ = [size / 2, size / 2];\n    this.size_ = [size, size];\n    this.imageSize_ = [imageSize, imageSize];\n  };\n\n  /**\n   * @private\n   * @param {RenderOptions} renderOptions Render options.\n   * @param {CanvasRenderingContext2D} context The rendering context.\n   * @param {number} x The origin for the symbol (x).\n   * @param {number} y The origin for the symbol (y).\n   */\n  RegularShape.prototype.draw_ = function draw_ (renderOptions, context, x, y) {\n    var i, angle0, radiusC;\n    // reset transform\n    context.setTransform(1, 0, 0, 1, 0, 0);\n\n    // then move to (x, y)\n    context.translate(x, y);\n\n    context.beginPath();\n\n    var points = this.points_;\n    if (points === Infinity) {\n      context.arc(\n        renderOptions.size / 2, renderOptions.size / 2,\n        this.radius_, 0, 2 * Math.PI, true);\n    } else {\n      var radius2 = (this.radius2_ !== undefined) ? this.radius2_\n        : this.radius_;\n      if (radius2 !== this.radius_) {\n        points = 2 * points;\n      }\n      for (i = 0; i <= points; i++) {\n        angle0 = i * 2 * Math.PI / points - Math.PI / 2 + this.angle_;\n        radiusC = i % 2 === 0 ? this.radius_ : radius2;\n        context.lineTo(renderOptions.size / 2 + radiusC * Math.cos(angle0),\n          renderOptions.size / 2 + radiusC * Math.sin(angle0));\n      }\n    }\n\n\n    if (this.fill_) {\n      var color = this.fill_.getColor();\n      if (color === null) {\n        color = defaultFillStyle;\n      }\n      context.fillStyle = asColorLike(color);\n      context.fill();\n    }\n    if (this.stroke_) {\n      context.strokeStyle = renderOptions.strokeStyle;\n      context.lineWidth = renderOptions.strokeWidth;\n      if (renderOptions.lineDash) {\n        context.setLineDash(renderOptions.lineDash);\n        context.lineDashOffset = renderOptions.lineDashOffset;\n      }\n      context.lineCap = /** @type {CanvasLineCap} */ (renderOptions.lineCap);\n      context.lineJoin = /** @type {CanvasLineJoin} */ (renderOptions.lineJoin);\n      context.miterLimit = renderOptions.miterLimit;\n      context.stroke();\n    }\n    context.closePath();\n  };\n\n  /**\n   * @private\n   * @param {RenderOptions} renderOptions Render options.\n   */\n  RegularShape.prototype.createHitDetectionCanvas_ = function createHitDetectionCanvas_ (renderOptions) {\n    this.hitDetectionImageSize_ = [renderOptions.size, renderOptions.size];\n    if (this.fill_) {\n      this.hitDetectionCanvas_ = this.canvas_;\n      return;\n    }\n\n    // if no fill style is set, create an extra hit-detection image with a\n    // default fill style\n    var context = createCanvasContext2D(renderOptions.size, renderOptions.size);\n    this.hitDetectionCanvas_ = context.canvas;\n\n    this.drawHitDetectionCanvas_(renderOptions, context, 0, 0);\n  };\n\n  /**\n   * @private\n   * @param {RenderOptions} renderOptions Render options.\n   * @param {CanvasRenderingContext2D} context The context.\n   * @param {number} x The origin for the symbol (x).\n   * @param {number} y The origin for the symbol (y).\n   */\n  RegularShape.prototype.drawHitDetectionCanvas_ = function drawHitDetectionCanvas_ (renderOptions, context, x, y) {\n    // reset transform\n    context.setTransform(1, 0, 0, 1, 0, 0);\n\n    // then move to (x, y)\n    context.translate(x, y);\n\n    context.beginPath();\n\n    var points = this.points_;\n    if (points === Infinity) {\n      context.arc(\n        renderOptions.size / 2, renderOptions.size / 2,\n        this.radius_, 0, 2 * Math.PI, true);\n    } else {\n      var radius2 = (this.radius2_ !== undefined) ? this.radius2_\n        : this.radius_;\n      if (radius2 !== this.radius_) {\n        points = 2 * points;\n      }\n      var i, radiusC, angle0;\n      for (i = 0; i <= points; i++) {\n        angle0 = i * 2 * Math.PI / points - Math.PI / 2 + this.angle_;\n        radiusC = i % 2 === 0 ? this.radius_ : radius2;\n        context.lineTo(renderOptions.size / 2 + radiusC * Math.cos(angle0),\n          renderOptions.size / 2 + radiusC * Math.sin(angle0));\n      }\n    }\n\n    context.fillStyle = asString(defaultFillStyle);\n    context.fill();\n    if (this.stroke_) {\n      context.strokeStyle = renderOptions.strokeStyle;\n      context.lineWidth = renderOptions.strokeWidth;\n      if (renderOptions.lineDash) {\n        context.setLineDash(renderOptions.lineDash);\n        context.lineDashOffset = renderOptions.lineDashOffset;\n      }\n      context.stroke();\n    }\n    context.closePath();\n  };\n\n  /**\n   * @return {string} The checksum.\n   */\n  RegularShape.prototype.getChecksum = function getChecksum () {\n    var strokeChecksum = this.stroke_ ?\n      this.stroke_.getChecksum() : '-';\n    var fillChecksum = this.fill_ ?\n      this.fill_.getChecksum() : '-';\n\n    var recalculate = !this.checksums_ ||\n        (strokeChecksum != this.checksums_[1] ||\n        fillChecksum != this.checksums_[2] ||\n        this.radius_ != this.checksums_[3] ||\n        this.radius2_ != this.checksums_[4] ||\n        this.angle_ != this.checksums_[5] ||\n        this.points_ != this.checksums_[6]);\n\n    if (recalculate) {\n      var checksum = 'r' + strokeChecksum + fillChecksum +\n          (this.radius_ !== undefined ? this.radius_.toString() : '-') +\n          (this.radius2_ !== undefined ? this.radius2_.toString() : '-') +\n          (this.angle_ !== undefined ? this.angle_.toString() : '-') +\n          (this.points_ !== undefined ? this.points_.toString() : '-');\n      this.checksums_ = [checksum, strokeChecksum, fillChecksum,\n        this.radius_, this.radius2_, this.angle_, this.points_];\n    }\n\n    return /** @type {string} */ (this.checksums_[0]);\n  };\n\n  return RegularShape;\n}(ImageStyle));\n\n\nexport default RegularShape;\n\n//# sourceMappingURL=RegularShape.js.map","/**\n * @module ol/style/Circle\n */\n\nimport RegularShape from './RegularShape.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Fill.js\").default} [fill] Fill style.\n * @property {number} radius Circle radius.\n * @property {import(\"./Stroke.js\").default} [stroke] Stroke style.\n * @property {import(\"./AtlasManager.js\").default} [atlasManager] The atlas manager to use for this circle.\n * When using WebGL it is recommended to use an atlas manager to avoid texture switching. If an atlas manager is given,\n * the circle is added to an atlas. By default no atlas manager is used.\n */\n\n\n/**\n * @classdesc\n * Set circle style for vector features.\n * @api\n */\nvar CircleStyle = /*@__PURE__*/(function (RegularShape) {\n  function CircleStyle(opt_options) {\n\n    var options = opt_options || /** @type {Options} */ ({});\n\n    RegularShape.call(this, {\n      points: Infinity,\n      fill: options.fill,\n      radius: options.radius,\n      stroke: options.stroke,\n      atlasManager: options.atlasManager\n    });\n\n  }\n\n  if ( RegularShape ) CircleStyle.__proto__ = RegularShape;\n  CircleStyle.prototype = Object.create( RegularShape && RegularShape.prototype );\n  CircleStyle.prototype.constructor = CircleStyle;\n\n  /**\n  * Clones the style.  If an atlasmanager was provided to the original style it will be used in the cloned style, too.\n  * @return {CircleStyle} The cloned style.\n  * @override\n  * @api\n  */\n  CircleStyle.prototype.clone = function clone () {\n    var style = new CircleStyle({\n      fill: this.getFill() ? this.getFill().clone() : undefined,\n      stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n      radius: this.getRadius(),\n      atlasManager: this.atlasManager_\n    });\n    style.setOpacity(this.getOpacity());\n    style.setScale(this.getScale());\n    return style;\n  };\n\n  /**\n  * Set the circle radius.\n  *\n  * @param {number} radius Circle radius.\n  * @api\n  */\n  CircleStyle.prototype.setRadius = function setRadius (radius) {\n    this.radius_ = radius;\n    this.render_(this.atlasManager_);\n  };\n\n  return CircleStyle;\n}(RegularShape));\n\n\nexport default CircleStyle;\n\n//# sourceMappingURL=Circle.js.map","/**\n * @module ol/style/Fill\n */\nimport {getUid} from '../util.js';\nimport {asString} from '../color.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} [color] A color, gradient or pattern.\n * See {@link module:ol/color~Color} and {@link module:ol/colorlike~ColorLike} for possible formats.\n * Default null; if null, the Canvas/renderer default black will be used.\n */\n\n\n/**\n * @classdesc\n * Set fill style for vector features.\n * @api\n */\nvar Fill = function Fill(opt_options) {\n\n  var options = opt_options || {};\n\n  /**\n   * @private\n   * @type {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike}\n   */\n  this.color_ = options.color !== undefined ? options.color : null;\n\n  /**\n   * @private\n   * @type {string|undefined}\n   */\n  this.checksum_ = undefined;\n};\n\n/**\n * Clones the style. The color is not cloned if it is an {@link module:ol/colorlike~ColorLike}.\n * @return {Fill} The cloned style.\n * @api\n */\nFill.prototype.clone = function clone () {\n  var color = this.getColor();\n  return new Fill({\n    color: Array.isArray(color) ? color.slice() : color || undefined\n  });\n};\n\n/**\n * Get the fill color.\n * @return {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} Color.\n * @api\n */\nFill.prototype.getColor = function getColor () {\n  return this.color_;\n};\n\n/**\n * Set the color.\n *\n * @param {import(\"../color.js\").Color|import(\"../colorlike.js\").ColorLike} color Color.\n * @api\n */\nFill.prototype.setColor = function setColor (color) {\n  this.color_ = color;\n  this.checksum_ = undefined;\n};\n\n/**\n * @return {string} The checksum.\n */\nFill.prototype.getChecksum = function getChecksum () {\n  if (this.checksum_ === undefined) {\n    var color = this.color_;\n    if (color) {\n      if (Array.isArray(color) || typeof color == 'string') {\n        this.checksum_ = 'f' + asString(/** @type {import(\"../color.js\").Color|string} */ (color));\n      } else {\n        this.checksum_ = getUid(this.color_);\n      }\n    } else {\n      this.checksum_ = 'f-';\n    }\n  }\n\n  return this.checksum_;\n};\n\nexport default Fill;\n\n//# sourceMappingURL=Fill.js.map","/**\n * @module ol/style/Style\n */\n\n/**\n * Feature styles.\n *\n * If no style is defined, the following default style is used:\n * ```js\n *  import {Fill, Stroke, Circle, Style} from 'ol/style';\n *\n *  var fill = new Fill({\n *    color: 'rgba(255,255,255,0.4)'\n *  });\n *  var stroke = new Stroke({\n *    color: '#3399CC',\n *    width: 1.25\n *  });\n *  var styles = [\n *    new Style({\n *      image: new Circle({\n *        fill: fill,\n *        stroke: stroke,\n *        radius: 5\n *      }),\n *      fill: fill,\n *      stroke: stroke\n *    })\n *  ];\n * ```\n *\n * A separate editing style has the following defaults:\n * ```js\n *  import {Fill, Stroke, Circle, Style} from 'ol/style';\n *  import GeometryType from 'ol/geom/GeometryType';\n *\n *  var white = [255, 255, 255, 1];\n *  var blue = [0, 153, 255, 1];\n *  var width = 3;\n *  styles[GeometryType.POLYGON] = [\n *    new Style({\n *      fill: new Fill({\n *        color: [255, 255, 255, 0.5]\n *      })\n *    })\n *  ];\n *  styles[GeometryType.MULTI_POLYGON] =\n *      styles[GeometryType.POLYGON];\n *  styles[GeometryType.LINE_STRING] = [\n *    new Style({\n *      stroke: new Stroke({\n *        color: white,\n *        width: width + 2\n *      })\n *    }),\n *    new Style({\n *      stroke: new Stroke({\n *        color: blue,\n *        width: width\n *      })\n *    })\n *  ];\n *  styles[GeometryType.MULTI_LINE_STRING] =\n *      styles[GeometryType.LINE_STRING];\n *  styles[GeometryType.POINT] = [\n *    new Style({\n *      image: new Circle({\n *        radius: width * 2,\n *        fill: new Fill({\n *          color: blue\n *        }),\n *        stroke: new Stroke({\n *          color: white,\n *          width: width / 2\n *        })\n *      }),\n *      zIndex: Infinity\n *    })\n *  ];\n *  styles[GeometryType.MULTI_POINT] =\n *      styles[GeometryType.POINT];\n *  styles[GeometryType.GEOMETRY_COLLECTION] =\n *      styles[GeometryType.POLYGON].concat(\n *          styles[GeometryType.LINE_STRING],\n *          styles[GeometryType.POINT]\n *      );\n * ```\n */\nimport {assert} from '../asserts.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport CircleStyle from './Circle.js';\nimport Fill from './Fill.js';\nimport Stroke from './Stroke.js';\n\n\n/**\n * A function that takes an {@link module:ol/Feature} and a `{number}`\n * representing the view's resolution. The function should return a\n * {@link module:ol/style/Style} or an array of them. This way e.g. a\n * vector layer can be styled.\n *\n * @typedef {function(import(\"../Feature.js\").FeatureLike, number):(Style|Array<Style>)} StyleFunction\n */\n\n/**\n * A {@link Style}, an array of {@link Style}, or a {@link StyleFunction}.\n * @typedef {Style|Array<Style>|StyleFunction} StyleLike\n */\n\n/**\n * A function that takes an {@link module:ol/Feature} as argument and returns an\n * {@link module:ol/geom/Geometry} that will be rendered and styled for the feature.\n *\n * @typedef {function(import(\"../Feature.js\").FeatureLike):\n *     (import(\"../geom/Geometry.js\").default|import(\"../render/Feature.js\").default|undefined)} GeometryFunction\n */\n\n\n/**\n * Custom renderer function. Takes two arguments:\n *\n * 1. The pixel coordinates of the geometry in GeoJSON notation.\n * 2. The {@link module:ol/render~State} of the layer renderer.\n *\n * @typedef {function((import(\"../coordinate.js\").Coordinate|Array<import(\"../coordinate.js\").Coordinate>|Array<Array<import(\"../coordinate.js\").Coordinate>>),import(\"../render.js\").State)}\n * RenderFunction\n */\n\n\n/**\n * @typedef {Object} Options\n * @property {string|import(\"../geom/Geometry.js\").default|GeometryFunction} [geometry] Feature property or geometry\n * or function returning a geometry to render for this style.\n * @property {import(\"./Fill.js\").default} [fill] Fill style.\n * @property {import(\"./Image.js\").default} [image] Image style.\n * @property {RenderFunction} [renderer] Custom renderer. When configured, `fill`, `stroke` and `image` will be\n * ignored, and the provided function will be called with each render frame for each geometry.\n * @property {import(\"./Stroke.js\").default} [stroke] Stroke style.\n * @property {import(\"./Text.js\").default} [text] Text style.\n * @property {number} [zIndex] Z index.\n */\n\n/**\n * @classdesc\n * Container for vector feature rendering styles. Any changes made to the style\n * or its children through `set*()` methods will not take effect until the\n * feature or layer that uses the style is re-rendered.\n * @api\n */\nvar Style = function Style(opt_options) {\n\n  var options = opt_options || {};\n\n  /**\n   * @private\n   * @type {string|import(\"../geom/Geometry.js\").default|GeometryFunction}\n   */\n  this.geometry_ = null;\n\n  /**\n   * @private\n   * @type {!GeometryFunction}\n   */\n  this.geometryFunction_ = defaultGeometryFunction;\n\n  if (options.geometry !== undefined) {\n    this.setGeometry(options.geometry);\n  }\n\n  /**\n   * @private\n   * @type {import(\"./Fill.js\").default}\n   */\n  this.fill_ = options.fill !== undefined ? options.fill : null;\n\n  /**\n     * @private\n     * @type {import(\"./Image.js\").default}\n     */\n  this.image_ = options.image !== undefined ? options.image : null;\n\n  /**\n   * @private\n   * @type {RenderFunction|null}\n   */\n  this.renderer_ = options.renderer !== undefined ? options.renderer : null;\n\n  /**\n   * @private\n   * @type {import(\"./Stroke.js\").default}\n   */\n  this.stroke_ = options.stroke !== undefined ? options.stroke : null;\n\n  /**\n   * @private\n   * @type {import(\"./Text.js\").default}\n   */\n  this.text_ = options.text !== undefined ? options.text : null;\n\n  /**\n   * @private\n   * @type {number|undefined}\n   */\n  this.zIndex_ = options.zIndex;\n\n};\n\n/**\n * Clones the style.\n * @return {Style} The cloned style.\n * @api\n */\nStyle.prototype.clone = function clone () {\n  var geometry = this.getGeometry();\n  if (geometry && typeof geometry === 'object') {\n    geometry = /** @type {import(\"../geom/Geometry.js\").default} */ (geometry).clone();\n  }\n  return new Style({\n    geometry: geometry,\n    fill: this.getFill() ? this.getFill().clone() : undefined,\n    image: this.getImage() ? this.getImage().clone() : undefined,\n    stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n    text: this.getText() ? this.getText().clone() : undefined,\n    zIndex: this.getZIndex()\n  });\n};\n\n/**\n * Get the custom renderer function that was configured with\n * {@link #setRenderer} or the `renderer` constructor option.\n * @return {RenderFunction|null} Custom renderer function.\n * @api\n */\nStyle.prototype.getRenderer = function getRenderer () {\n  return this.renderer_;\n};\n\n/**\n * Sets a custom renderer function for this style. When set, `fill`, `stroke`\n * and `image` options of the style will be ignored.\n * @param {RenderFunction|null} renderer Custom renderer function.\n * @api\n */\nStyle.prototype.setRenderer = function setRenderer (renderer) {\n  this.renderer_ = renderer;\n};\n\n/**\n * Get the geometry to be rendered.\n * @return {string|import(\"../geom/Geometry.js\").default|GeometryFunction}\n * Feature property or geometry or function that returns the geometry that will\n * be rendered with this style.\n * @api\n */\nStyle.prototype.getGeometry = function getGeometry () {\n  return this.geometry_;\n};\n\n/**\n * Get the function used to generate a geometry for rendering.\n * @return {!GeometryFunction} Function that is called with a feature\n * and returns the geometry to render instead of the feature's geometry.\n * @api\n */\nStyle.prototype.getGeometryFunction = function getGeometryFunction () {\n  return this.geometryFunction_;\n};\n\n/**\n * Get the fill style.\n * @return {import(\"./Fill.js\").default} Fill style.\n * @api\n */\nStyle.prototype.getFill = function getFill () {\n  return this.fill_;\n};\n\n/**\n * Set the fill style.\n * @param {import(\"./Fill.js\").default} fill Fill style.\n * @api\n */\nStyle.prototype.setFill = function setFill (fill) {\n  this.fill_ = fill;\n};\n\n/**\n * Get the image style.\n * @return {import(\"./Image.js\").default} Image style.\n * @api\n */\nStyle.prototype.getImage = function getImage () {\n  return this.image_;\n};\n\n/**\n * Set the image style.\n * @param {import(\"./Image.js\").default} image Image style.\n * @api\n */\nStyle.prototype.setImage = function setImage (image) {\n  this.image_ = image;\n};\n\n/**\n * Get the stroke style.\n * @return {import(\"./Stroke.js\").default} Stroke style.\n * @api\n */\nStyle.prototype.getStroke = function getStroke () {\n  return this.stroke_;\n};\n\n/**\n * Set the stroke style.\n * @param {import(\"./Stroke.js\").default} stroke Stroke style.\n * @api\n */\nStyle.prototype.setStroke = function setStroke (stroke) {\n  this.stroke_ = stroke;\n};\n\n/**\n * Get the text style.\n * @return {import(\"./Text.js\").default} Text style.\n * @api\n */\nStyle.prototype.getText = function getText () {\n  return this.text_;\n};\n\n/**\n * Set the text style.\n * @param {import(\"./Text.js\").default} text Text style.\n * @api\n */\nStyle.prototype.setText = function setText (text) {\n  this.text_ = text;\n};\n\n/**\n * Get the z-index for the style.\n * @return {number|undefined} ZIndex.\n * @api\n */\nStyle.prototype.getZIndex = function getZIndex () {\n  return this.zIndex_;\n};\n\n/**\n * Set a geometry that is rendered instead of the feature's geometry.\n *\n * @param {string|import(\"../geom/Geometry.js\").default|GeometryFunction} geometry\n *   Feature property or geometry or function returning a geometry to render\n *   for this style.\n * @api\n */\nStyle.prototype.setGeometry = function setGeometry (geometry) {\n  if (typeof geometry === 'function') {\n    this.geometryFunction_ = geometry;\n  } else if (typeof geometry === 'string') {\n    this.geometryFunction_ = function(feature) {\n      return (\n        /** @type {import(\"../geom/Geometry.js\").default} */ (feature.get(geometry))\n      );\n    };\n  } else if (!geometry) {\n    this.geometryFunction_ = defaultGeometryFunction;\n  } else if (geometry !== undefined) {\n    this.geometryFunction_ = function() {\n      return (\n        /** @type {import(\"../geom/Geometry.js\").default} */ (geometry)\n      );\n    };\n  }\n  this.geometry_ = geometry;\n};\n\n/**\n * Set the z-index.\n *\n * @param {number|undefined} zIndex ZIndex.\n * @api\n */\nStyle.prototype.setZIndex = function setZIndex (zIndex) {\n  this.zIndex_ = zIndex;\n};\n\n\n/**\n * Convert the provided object into a style function.  Functions passed through\n * unchanged.  Arrays of Style or single style objects wrapped in a\n * new style function.\n * @param {StyleFunction|Array<Style>|Style} obj\n *     A style function, a single style, or an array of styles.\n * @return {StyleFunction} A style function.\n */\nexport function toFunction(obj) {\n  var styleFunction;\n\n  if (typeof obj === 'function') {\n    styleFunction = obj;\n  } else {\n    /**\n     * @type {Array<Style>}\n     */\n    var styles;\n    if (Array.isArray(obj)) {\n      styles = obj;\n    } else {\n      assert(typeof /** @type {?} */ (obj).getZIndex === 'function',\n        41); // Expected an `Style` or an array of `Style`\n      var style = /** @type {Style} */ (obj);\n      styles = [style];\n    }\n    styleFunction = function() {\n      return styles;\n    };\n  }\n  return styleFunction;\n}\n\n\n/**\n * @type {Array<Style>}\n */\nvar defaultStyles = null;\n\n\n/**\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature.\n * @param {number} resolution Resolution.\n * @return {Array<Style>} Style.\n */\nexport function createDefaultStyle(feature, resolution) {\n  // We don't use an immediately-invoked function\n  // and a closure so we don't get an error at script evaluation time in\n  // browsers that do not support Canvas. (import(\"./Circle.js\").CircleStyle does\n  // canvas.getContext('2d') at construction time, which will cause an.error\n  // in such browsers.)\n  if (!defaultStyles) {\n    var fill = new Fill({\n      color: 'rgba(255,255,255,0.4)'\n    });\n    var stroke = new Stroke({\n      color: '#3399CC',\n      width: 1.25\n    });\n    defaultStyles = [\n      new Style({\n        image: new CircleStyle({\n          fill: fill,\n          stroke: stroke,\n          radius: 5\n        }),\n        fill: fill,\n        stroke: stroke\n      })\n    ];\n  }\n  return defaultStyles;\n}\n\n\n/**\n * Default styles for editing features.\n * @return {Object<import(\"../geom/GeometryType.js\").default, Array<Style>>} Styles\n */\nexport function createEditingStyle() {\n  /** @type {Object<import(\"../geom/GeometryType.js\").default, Array<Style>>} */\n  var styles = {};\n  var white = [255, 255, 255, 1];\n  var blue = [0, 153, 255, 1];\n  var width = 3;\n  styles[GeometryType.POLYGON] = [\n    new Style({\n      fill: new Fill({\n        color: [255, 255, 255, 0.5]\n      })\n    })\n  ];\n  styles[GeometryType.MULTI_POLYGON] =\n      styles[GeometryType.POLYGON];\n\n  styles[GeometryType.LINE_STRING] = [\n    new Style({\n      stroke: new Stroke({\n        color: white,\n        width: width + 2\n      })\n    }),\n    new Style({\n      stroke: new Stroke({\n        color: blue,\n        width: width\n      })\n    })\n  ];\n  styles[GeometryType.MULTI_LINE_STRING] =\n      styles[GeometryType.LINE_STRING];\n\n  styles[GeometryType.CIRCLE] =\n      styles[GeometryType.POLYGON].concat(\n        styles[GeometryType.LINE_STRING]\n      );\n\n\n  styles[GeometryType.POINT] = [\n    new Style({\n      image: new CircleStyle({\n        radius: width * 2,\n        fill: new Fill({\n          color: blue\n        }),\n        stroke: new Stroke({\n          color: white,\n          width: width / 2\n        })\n      }),\n      zIndex: Infinity\n    })\n  ];\n  styles[GeometryType.MULTI_POINT] =\n      styles[GeometryType.POINT];\n\n  styles[GeometryType.GEOMETRY_COLLECTION] =\n      styles[GeometryType.POLYGON].concat(\n        styles[GeometryType.LINE_STRING],\n        styles[GeometryType.POINT]\n      );\n\n  return styles;\n}\n\n\n/**\n * Function that is called with a feature and returns its default geometry.\n * @param {import(\"../Feature.js\").FeatureLike} feature Feature to get the geometry for.\n * @return {import(\"../geom/Geometry.js\").default|import(\"../render/Feature.js\").default|undefined} Geometry to render.\n */\nfunction defaultGeometryFunction(feature) {\n  return feature.getGeometry();\n}\n\nexport default Style;\n\n//# sourceMappingURL=Style.js.map","/**\n * @module ol/layer/Vector\n */\nimport LayerType from '../LayerType.js';\nimport Layer from './Layer.js';\nimport VectorRenderType from './VectorRenderType.js';\nimport {assign} from '../obj.js';\nimport {createDefaultStyle, toFunction as toStyleFunction} from '../style/Style.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {import(\"../render.js\").OrderFunction} [renderOrder] Render order. Function to be used when sorting\n * features before rendering. By default features are drawn in the order that they are created. Use\n * `null` to avoid the sort, but get an undefined draw order.\n * @property {number} [renderBuffer=100] The buffer in pixels around the viewport extent used by the\n * renderer when getting features from the vector source for the rendering or hit-detection.\n * Recommended value: the size of the largest symbol, line width or label.\n * @property {import(\"./VectorRenderType.js\").default|string} [renderMode='vector'] Render mode for vector layers:\n *  * `'image'`: Vector layers are rendered as images. Great performance, but point symbols and\n *    texts are always rotated with the view and pixels are scaled during zoom animations.\n *  * `'vector'`: Vector layers are rendered as vectors. Most accurate rendering even during\n *    animations, but slower performance.\n * @property {import(\"../source/Vector.js\").default} [source] Source.\n * @property {import(\"../PluggableMap.js\").default} [map] Sets the layer as overlay on a map. The map will not manage\n * this layer in its layers collection, and the layer will be rendered on top. This is useful for\n * temporary layers. The standard way to add a layer to a map and have it managed by the map is to\n * use {@link module:ol/Map#addLayer}.\n * @property {boolean} [declutter=false] Declutter images and text. Decluttering is applied to all\n * image and text styles, and the priority is defined by the z-index of the style. Lower z-index\n * means higher priority.\n * @property {import(\"../style/Style.js\").StyleLike} [style] Layer style. See\n * {@link module:ol/style} for default style which will be used if this is not defined.\n * @property {boolean} [updateWhileAnimating=false] When set to `true` and `renderMode`\n * is `vector`, feature batches will be recreated during animations. This means that no\n * vectors will be shown clipped, but the setting will have a performance impact for large\n * amounts of vector data. When set to `false`, batches will be recreated when no animation\n * is active.\n * @property {boolean} [updateWhileInteracting=false] When set to `true` and `renderMode`\n * is `vector`, feature batches will be recreated during interactions. See also\n * `updateWhileAnimating`.\n */\n\n\n/**\n * @enum {string}\n * @private\n */\nvar Property = {\n  RENDER_ORDER: 'renderOrder'\n};\n\n\n/**\n * @classdesc\n * Vector data that is rendered client-side.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @api\n */\nvar VectorLayer = /*@__PURE__*/(function (Layer) {\n  function VectorLayer(opt_options) {\n    var options = opt_options ?\n      opt_options : /** @type {Options} */ ({});\n\n    var baseOptions = assign({}, options);\n\n    delete baseOptions.style;\n    delete baseOptions.renderBuffer;\n    delete baseOptions.updateWhileAnimating;\n    delete baseOptions.updateWhileInteracting;\n    Layer.call(this, baseOptions);\n\n    /**\n    * @private\n    * @type {boolean}\n    */\n    this.declutter_ = options.declutter !== undefined ? options.declutter : false;\n\n    /**\n    * @type {number}\n    * @private\n    */\n    this.renderBuffer_ = options.renderBuffer !== undefined ?\n      options.renderBuffer : 100;\n\n    /**\n    * User provided style.\n    * @type {import(\"../style/Style.js\").StyleLike}\n    * @private\n    */\n    this.style_ = null;\n\n    /**\n    * Style function for use within the library.\n    * @type {import(\"../style/Style.js\").StyleFunction|undefined}\n    * @private\n    */\n    this.styleFunction_ = undefined;\n\n    this.setStyle(options.style);\n\n    /**\n    * @type {boolean}\n    * @private\n    */\n    this.updateWhileAnimating_ = options.updateWhileAnimating !== undefined ?\n      options.updateWhileAnimating : false;\n\n    /**\n    * @type {boolean}\n    * @private\n    */\n    this.updateWhileInteracting_ = options.updateWhileInteracting !== undefined ?\n      options.updateWhileInteracting : false;\n\n    /**\n    * @private\n    * @type {import(\"./VectorTileRenderType.js\").default|string}\n    */\n    this.renderMode_ = options.renderMode || VectorRenderType.VECTOR;\n\n    /**\n    * The layer type.\n    * @protected\n    * @type {import(\"../LayerType.js\").default}\n    */\n    this.type = LayerType.VECTOR;\n\n  }\n\n  if ( Layer ) VectorLayer.__proto__ = Layer;\n  VectorLayer.prototype = Object.create( Layer && Layer.prototype );\n  VectorLayer.prototype.constructor = VectorLayer;\n\n  /**\n  * @return {boolean} Declutter.\n  */\n  VectorLayer.prototype.getDeclutter = function getDeclutter () {\n    return this.declutter_;\n  };\n\n  /**\n  * @param {boolean} declutter Declutter.\n  */\n  VectorLayer.prototype.setDeclutter = function setDeclutter (declutter) {\n    this.declutter_ = declutter;\n  };\n\n  /**\n  * @return {number|undefined} Render buffer.\n  */\n  VectorLayer.prototype.getRenderBuffer = function getRenderBuffer () {\n    return this.renderBuffer_;\n  };\n\n  /**\n  * @return {function(import(\"../Feature.js\").default, import(\"../Feature.js\").default): number|null|undefined} Render\n  *     order.\n  */\n  VectorLayer.prototype.getRenderOrder = function getRenderOrder () {\n    return (\n    /** @type {import(\"../render.js\").OrderFunction|null|undefined} */ (this.get(Property.RENDER_ORDER))\n    );\n  };\n\n  /**\n  * Get the style for features.  This returns whatever was passed to the `style`\n  * option at construction or to the `setStyle` method.\n  * @return {import(\"../style/Style.js\").StyleLike}\n  *     Layer style.\n  * @api\n  */\n  VectorLayer.prototype.getStyle = function getStyle () {\n    return this.style_;\n  };\n\n  /**\n  * Get the style function.\n  * @return {import(\"../style/Style.js\").StyleFunction|undefined} Layer style function.\n  * @api\n  */\n  VectorLayer.prototype.getStyleFunction = function getStyleFunction () {\n    return this.styleFunction_;\n  };\n\n  /**\n  * @return {boolean} Whether the rendered layer should be updated while\n  *     animating.\n  */\n  VectorLayer.prototype.getUpdateWhileAnimating = function getUpdateWhileAnimating () {\n    return this.updateWhileAnimating_;\n  };\n\n  /**\n  * @return {boolean} Whether the rendered layer should be updated while\n  *     interacting.\n  */\n  VectorLayer.prototype.getUpdateWhileInteracting = function getUpdateWhileInteracting () {\n    return this.updateWhileInteracting_;\n  };\n\n  /**\n  * @param {import(\"../render.js\").OrderFunction|null|undefined} renderOrder\n  *     Render order.\n  */\n  VectorLayer.prototype.setRenderOrder = function setRenderOrder (renderOrder) {\n    this.set(Property.RENDER_ORDER, renderOrder);\n  };\n\n  /**\n  * Set the style for features.  This can be a single style object, an array\n  * of styles, or a function that takes a feature and resolution and returns\n  * an array of styles. If it is `undefined` the default style is used. If\n  * it is `null` the layer has no style (a `null` style), so only features\n  * that have their own styles will be rendered in the layer. See\n  * {@link module:ol/style} for information on the default style.\n  * @param {import(\"../style/Style.js\").default|Array<import(\"../style/Style.js\").default>|import(\"../style/Style.js\").StyleFunction|null|undefined} style Layer style.\n  * @api\n  */\n  VectorLayer.prototype.setStyle = function setStyle (style) {\n    this.style_ = style !== undefined ? style : createDefaultStyle;\n    this.styleFunction_ = style === null ?\n      undefined : toStyleFunction(this.style_);\n    this.changed();\n  };\n\n  /**\n  * @return {import(\"./VectorRenderType.js\").default|string} The render mode.\n  */\n  VectorLayer.prototype.getRenderMode = function getRenderMode () {\n    return this.renderMode_;\n  };\n\n  return VectorLayer;\n}(Layer));\n\n\n/**\n * Return the associated {@link module:ol/source/Vector vectorsource} of the layer.\n * @function\n * @return {import(\"../source/Vector.js\").default} Source.\n * @api\n */\nVectorLayer.prototype.getSource;\n\n\nexport default VectorLayer;\n\n//# sourceMappingURL=Vector.js.map","/**\n * @module ol/interaction/Draw\n */\nimport EventType from '../events/EventType.js';\nimport Feature from '../Feature.js';\nimport MapBrowserEventType from '../MapBrowserEventType.js';\nimport MapBrowserPointerEvent from '../MapBrowserPointerEvent.js';\nimport {getChangeEventType} from '../Object.js';\nimport {squaredDistance as squaredCoordinateDistance} from '../coordinate.js';\nimport {listen} from '../events.js';\nimport Event from '../events/Event.js';\nimport {noModifierKeys, always, shiftKeyOnly} from '../events/condition.js';\nimport {boundingExtent, getBottomLeft, getBottomRight, getTopLeft, getTopRight} from '../extent.js';\nimport {TRUE, FALSE} from '../functions.js';\nimport Circle from '../geom/Circle.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport LineString from '../geom/LineString.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport {POINTER_TYPE} from '../pointer/MouseSource.js';\nimport Point from '../geom/Point.js';\nimport Polygon, {fromCircle, makeRegular} from '../geom/Polygon.js';\nimport PointerInteraction from './Pointer.js';\nimport InteractionProperty from './Property.js';\nimport VectorLayer from '../layer/Vector.js';\nimport VectorSource from '../source/Vector.js';\nimport {createEditingStyle} from '../style/Style.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {GeometryType} type Geometry type of\n * the geometries being drawn with this instance.\n * @property {number} [clickTolerance=6] The maximum distance in pixels between\n * \"down\" and \"up\" for a \"up\" event to be considered a \"click\" event and\n * actually add a point/vertex to the geometry being drawn.  The default of `6`\n * was chosen for the draw interaction to behave correctly on mouse as well as\n * on touch devices.\n * @property {import(\"../Collection.js\").default<Feature>} [features]\n * Destination collection for the drawn features.\n * @property {VectorSource} [source] Destination source for\n * the drawn features.\n * @property {number} [dragVertexDelay=500] Delay in milliseconds after pointerdown\n * before the current vertex can be dragged to its exact position.\n * @property {number} [snapTolerance=12] Pixel distance for snapping to the\n * drawing finish.\n * @property {boolean} [stopClick=false] Stop click, singleclick, and\n * doubleclick events from firing during drawing.\n * @property {number} [maxPoints] The number of points that can be drawn before\n * a polygon ring or line string is finished. By default there is no\n * restriction.\n * @property {number} [minPoints] The number of points that must be drawn\n * before a polygon ring or line string can be finished. Default is `3` for\n * polygon rings and `2` for line strings.\n * @property {import(\"../events/condition.js\").Condition} [finishCondition] A function\n * that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether the drawing can be finished.\n * @property {import(\"../style/Style.js\").StyleLike} [style]\n * Style for sketch features.\n * @property {GeometryFunction} [geometryFunction]\n * Function that is called when a geometry's coordinates are updated.\n * @property {string} [geometryName] Geometry name to use for features created\n * by the draw interaction.\n * @property {import(\"../events/condition.js\").Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled.\n * By default {@link module:ol/events/condition~noModifierKeys}, i.e. a click,\n * adds a vertex or deactivates freehand drawing.\n * @property {boolean} [freehand=false] Operate in freehand mode for lines,\n * polygons, and circles.  This makes the interaction always operate in freehand\n * mode and takes precedence over any `freehandCondition` option.\n * @property {import(\"../events/condition.js\").Condition} [freehandCondition]\n * Condition that activates freehand drawing for lines and polygons. This\n * function takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and\n * returns a boolean to indicate whether that event should be handled. The\n * default is {@link module:ol/events/condition~shiftKeyOnly}, meaning that the\n * Shift key activates freehand drawing.\n * @property {boolean} [wrapX=false] Wrap the world horizontally on the sketch\n * overlay.\n */\n\n\n/**\n * Coordinate type when drawing points.\n * @typedef {import(\"../coordinate.js\").Coordinate} PointCoordType\n */\n\n\n/**\n * Coordinate type when drawing lines.\n * @typedef {Array<import(\"../coordinate.js\").Coordinate>} LineCoordType\n */\n\n\n/**\n * Coordinate type when drawing polygons.\n * @typedef {Array<Array<import(\"../coordinate.js\").Coordinate>>} PolyCoordType\n */\n\n\n/**\n * Types used for drawing coordinates.\n * @typedef {PointCoordType|LineCoordType|PolyCoordType} SketchCoordType\n */\n\n\n/**\n * Function that takes an array of coordinates and an optional existing geometry as\n * arguments, and returns a geometry. The optional existing geometry is the\n * geometry that is returned when the function is called without a second\n * argument.\n * @typedef {function(!SketchCoordType, import(\"../geom/SimpleGeometry.js\").default=):\n *     import(\"../geom/SimpleGeometry.js\").default} GeometryFunction\n */\n\n\n/**\n * Draw mode.  This collapses multi-part geometry types with their single-part\n * cousins.\n * @enum {string}\n */\nvar Mode = {\n  POINT: 'Point',\n  LINE_STRING: 'LineString',\n  POLYGON: 'Polygon',\n  CIRCLE: 'Circle'\n};\n\n\n/**\n * @enum {string}\n */\nvar DrawEventType = {\n  /**\n   * Triggered upon feature draw start\n   * @event DrawEvent#drawstart\n   * @api\n   */\n  DRAWSTART: 'drawstart',\n  /**\n   * Triggered upon feature draw end\n   * @event DrawEvent#drawend\n   * @api\n   */\n  DRAWEND: 'drawend'\n};\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/interaction/Draw~Draw} instances are\n * instances of this type.\n */\nvar DrawEvent = /*@__PURE__*/(function (Event) {\n  function DrawEvent(type, feature) {\n\n    Event.call(this, type);\n\n    /**\n     * The feature being drawn.\n     * @type {Feature}\n     * @api\n     */\n    this.feature = feature;\n\n  }\n\n  if ( Event ) DrawEvent.__proto__ = Event;\n  DrawEvent.prototype = Object.create( Event && Event.prototype );\n  DrawEvent.prototype.constructor = DrawEvent;\n\n  return DrawEvent;\n}(Event));\n\n\n/**\n * @classdesc\n * Interaction for drawing feature geometries.\n *\n * @fires DrawEvent\n * @api\n */\nvar Draw = /*@__PURE__*/(function (PointerInteraction) {\n  function Draw(options) {\n\n    var pointerOptions = /** @type {import(\"./Pointer.js\").Options} */ (options);\n    if (!pointerOptions.stopDown) {\n      pointerOptions.stopDown = FALSE;\n    }\n\n    PointerInteraction.call(this, pointerOptions);\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.shouldHandle_ = false;\n\n    /**\n     * @type {import(\"../pixel.js\").Pixel}\n     * @private\n     */\n    this.downPx_ = null;\n\n    /**\n     * @type {?}\n     * @private\n     */\n    this.downTimeout_;\n\n    /**\n     * @type {number|undefined}\n     * @private\n     */\n    this.lastDragTime_;\n\n    /**\n     * @type {boolean}\n     * @private\n     */\n    this.freehand_ = false;\n\n    /**\n     * Target source for drawn features.\n     * @type {VectorSource}\n     * @private\n     */\n    this.source_ = options.source ? options.source : null;\n\n    /**\n     * Target collection for drawn features.\n     * @type {import(\"../Collection.js\").default<Feature>}\n     * @private\n     */\n    this.features_ = options.features ? options.features : null;\n\n    /**\n     * Pixel distance for snapping.\n     * @type {number}\n     * @private\n     */\n    this.snapTolerance_ = options.snapTolerance ? options.snapTolerance : 12;\n\n    /**\n     * Geometry type.\n     * @type {GeometryType}\n     * @private\n     */\n    this.type_ = /** @type {GeometryType} */ (options.type);\n\n    /**\n     * Drawing mode (derived from geometry type.\n     * @type {Mode}\n     * @private\n     */\n    this.mode_ = getMode(this.type_);\n\n    /**\n     * Stop click, singleclick, and doubleclick events from firing during drawing.\n     * Default is `false`.\n     * @type {boolean}\n     * @private\n     */\n    this.stopClick_ = !!options.stopClick;\n\n    /**\n     * The number of points that must be drawn before a polygon ring or line\n     * string can be finished.  The default is 3 for polygon rings and 2 for\n     * line strings.\n     * @type {number}\n     * @private\n     */\n    this.minPoints_ = options.minPoints ?\n      options.minPoints :\n      (this.mode_ === Mode.POLYGON ? 3 : 2);\n\n    /**\n     * The number of points that can be drawn before a polygon ring or line string\n     * is finished. The default is no restriction.\n     * @type {number}\n     * @private\n     */\n    this.maxPoints_ = options.maxPoints ? options.maxPoints : Infinity;\n\n    /**\n     * A function to decide if a potential finish coordinate is permissible\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.finishCondition_ = options.finishCondition ? options.finishCondition : TRUE;\n\n    var geometryFunction = options.geometryFunction;\n    if (!geometryFunction) {\n      if (this.type_ === GeometryType.CIRCLE) {\n        /**\n         * @param {!LineCoordType} coordinates The coordinates.\n         * @param {import(\"../geom/SimpleGeometry.js\").default=} opt_geometry Optional geometry.\n         * @return {import(\"../geom/SimpleGeometry.js\").default} A geometry.\n         */\n        geometryFunction = function(coordinates, opt_geometry) {\n          var circle = opt_geometry ? /** @type {Circle} */ (opt_geometry) :\n            new Circle([NaN, NaN]);\n          var squaredLength = squaredCoordinateDistance(\n            coordinates[0], coordinates[1]);\n          circle.setCenterAndRadius(coordinates[0], Math.sqrt(squaredLength));\n          return circle;\n        };\n      } else {\n        var Constructor;\n        var mode = this.mode_;\n        if (mode === Mode.POINT) {\n          Constructor = Point;\n        } else if (mode === Mode.LINE_STRING) {\n          Constructor = LineString;\n        } else if (mode === Mode.POLYGON) {\n          Constructor = Polygon;\n        }\n        /**\n         * @param {!LineCoordType} coordinates The coordinates.\n         * @param {import(\"../geom/SimpleGeometry.js\").default=} opt_geometry Optional geometry.\n         * @return {import(\"../geom/SimpleGeometry.js\").default} A geometry.\n         */\n        geometryFunction = function(coordinates, opt_geometry) {\n          var geometry = opt_geometry;\n          if (geometry) {\n            if (mode === Mode.POLYGON) {\n              if (coordinates[0].length) {\n                // Add a closing coordinate to match the first\n                geometry.setCoordinates([coordinates[0].concat([coordinates[0][0]])]);\n              } else {\n                geometry.setCoordinates([]);\n              }\n            } else {\n              geometry.setCoordinates(coordinates);\n            }\n          } else {\n            geometry = new Constructor(coordinates);\n          }\n          return geometry;\n        };\n      }\n    }\n\n    /**\n     * @type {GeometryFunction}\n     * @private\n     */\n    this.geometryFunction_ = geometryFunction;\n\n    /**\n     * @type {number}\n     * @private\n     */\n    this.dragVertexDelay_ = options.dragVertexDelay !== undefined ? options.dragVertexDelay : 500;\n\n    /**\n     * Finish coordinate for the feature (first point for polygons, last point for\n     * linestrings).\n     * @type {import(\"../coordinate.js\").Coordinate}\n     * @private\n     */\n    this.finishCoordinate_ = null;\n\n    /**\n     * Sketch feature.\n     * @type {Feature}\n     * @private\n     */\n    this.sketchFeature_ = null;\n\n    /**\n     * Sketch point.\n     * @type {Feature}\n     * @private\n     */\n    this.sketchPoint_ = null;\n\n    /**\n     * Sketch coordinates. Used when drawing a line or polygon.\n     * @type {SketchCoordType}\n     * @private\n     */\n    this.sketchCoords_ = null;\n\n    /**\n     * Sketch line. Used when drawing polygon.\n     * @type {Feature}\n     * @private\n     */\n    this.sketchLine_ = null;\n\n    /**\n     * Sketch line coordinates. Used when drawing a polygon or circle.\n     * @type {LineCoordType}\n     * @private\n     */\n    this.sketchLineCoords_ = null;\n\n    /**\n     * Squared tolerance for handling up events.  If the squared distance\n     * between a down and up event is greater than this tolerance, up events\n     * will not be handled.\n     * @type {number}\n     * @private\n     */\n    this.squaredClickTolerance_ = options.clickTolerance ?\n      options.clickTolerance * options.clickTolerance : 36;\n\n    /**\n     * Draw overlay where our sketch features are drawn.\n     * @type {VectorLayer}\n     * @private\n     */\n    this.overlay_ = new VectorLayer({\n      source: new VectorSource({\n        useSpatialIndex: false,\n        wrapX: options.wrapX ? options.wrapX : false\n      }),\n      style: options.style ? options.style :\n        getDefaultStyleFunction(),\n      updateWhileInteracting: true\n    });\n\n    /**\n     * Name of the geometry attribute for newly created features.\n     * @type {string|undefined}\n     * @private\n     */\n    this.geometryName_ = options.geometryName;\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.condition_ = options.condition ? options.condition : noModifierKeys;\n\n    /**\n     * @private\n     * @type {import(\"../events/condition.js\").Condition}\n     */\n    this.freehandCondition_;\n    if (options.freehand) {\n      this.freehandCondition_ = always;\n    } else {\n      this.freehandCondition_ = options.freehandCondition ?\n        options.freehandCondition : shiftKeyOnly;\n    }\n\n    listen(this,\n      getChangeEventType(InteractionProperty.ACTIVE),\n      this.updateState_, this);\n\n  }\n\n  if ( PointerInteraction ) Draw.__proto__ = PointerInteraction;\n  Draw.prototype = Object.create( PointerInteraction && PointerInteraction.prototype );\n  Draw.prototype.constructor = Draw;\n\n  /**\n   * @inheritDoc\n   */\n  Draw.prototype.setMap = function setMap (map) {\n    PointerInteraction.prototype.setMap.call(this, map);\n    this.updateState_();\n  };\n\n  /**\n   * Get the overlay layer that this interaction renders sketch features to.\n   * @return {VectorLayer} Overlay layer.\n   * @api\n   */\n  Draw.prototype.getOverlay = function getOverlay () {\n    return this.overlay_;\n  };\n\n  /**\n   * Handles the {@link module:ol/MapBrowserEvent map browser event} and may actually draw or finish the drawing.\n   * @override\n   * @api\n   */\n  Draw.prototype.handleEvent = function handleEvent (event) {\n    if (event.originalEvent.type === EventType.CONTEXTMENU) {\n      // Avoid context menu for long taps when drawing on mobile\n      event.preventDefault();\n    }\n    this.freehand_ = this.mode_ !== Mode.POINT && this.freehandCondition_(event);\n    var move = event.type === MapBrowserEventType.POINTERMOVE;\n    var pass = true;\n    if (!this.freehand_ && this.lastDragTime_ && event.type === MapBrowserEventType.POINTERDRAG) {\n      var now = Date.now();\n      if (now - this.lastDragTime_ >= this.dragVertexDelay_) {\n        this.downPx_ = event.pixel;\n        this.shouldHandle_ = !this.freehand_;\n        move = true;\n      } else {\n        this.lastDragTime_ = undefined;\n      }\n      if (this.shouldHandle_ && this.downTimeout_ !== undefined) {\n        clearTimeout(this.downTimeout_);\n        this.downTimeout_ = undefined;\n      }\n    }\n    if (this.freehand_ &&\n        event.type === MapBrowserEventType.POINTERDRAG &&\n        this.sketchFeature_ !== null) {\n      this.addToDrawing_(event);\n      pass = false;\n    } else if (this.freehand_ &&\n        event.type === MapBrowserEventType.POINTERDOWN) {\n      pass = false;\n    } else if (move) {\n      pass = event.type === MapBrowserEventType.POINTERMOVE;\n      if (pass && this.freehand_) {\n        pass = this.handlePointerMove_(event);\n      } else if (/** @type {MapBrowserPointerEvent} */ (event).pointerEvent.pointerType == POINTER_TYPE ||\n          (event.type === MapBrowserEventType.POINTERDRAG && this.downTimeout_ === undefined)) {\n        this.handlePointerMove_(event);\n      }\n    } else if (event.type === MapBrowserEventType.DBLCLICK) {\n      pass = false;\n    }\n\n    return PointerInteraction.prototype.handleEvent.call(this, event) && pass;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  Draw.prototype.handleDownEvent = function handleDownEvent (event) {\n    this.shouldHandle_ = !this.freehand_;\n\n    if (this.freehand_) {\n      this.downPx_ = event.pixel;\n      if (!this.finishCoordinate_) {\n        this.startDrawing_(event);\n      }\n      return true;\n    } else if (this.condition_(event)) {\n      this.lastDragTime_ = Date.now();\n      this.downTimeout_ = setTimeout(function() {\n        this.handlePointerMove_(new MapBrowserPointerEvent(\n          MapBrowserEventType.POINTERMOVE, event.map, event.pointerEvent, false, event.frameState));\n      }.bind(this), this.dragVertexDelay_);\n      this.downPx_ = event.pixel;\n      return true;\n    } else {\n      return false;\n    }\n  };\n\n\n  /**\n   * @inheritDoc\n   */\n  Draw.prototype.handleUpEvent = function handleUpEvent (event) {\n    var pass = true;\n\n    if (this.downTimeout_) {\n      clearTimeout(this.downTimeout_);\n      this.downTimeout_ = undefined;\n    }\n\n    this.handlePointerMove_(event);\n\n    var circleMode = this.mode_ === Mode.CIRCLE;\n\n    if (this.shouldHandle_) {\n      if (!this.finishCoordinate_) {\n        this.startDrawing_(event);\n        if (this.mode_ === Mode.POINT) {\n          this.finishDrawing();\n        }\n      } else if (this.freehand_ || circleMode) {\n        this.finishDrawing();\n      } else if (this.atFinish_(event)) {\n        if (this.finishCondition_(event)) {\n          this.finishDrawing();\n        }\n      } else {\n        this.addToDrawing_(event);\n      }\n      pass = false;\n    } else if (this.freehand_) {\n      this.finishCoordinate_ = null;\n      this.abortDrawing_();\n    }\n    if (!pass && this.stopClick_) {\n      event.stopPropagation();\n    }\n    return pass;\n  };\n\n  /**\n   * Handle move events.\n   * @param {import(\"../MapBrowserEvent.js\").default} event A move event.\n   * @return {boolean} Pass the event to other interactions.\n   * @private\n   */\n  Draw.prototype.handlePointerMove_ = function handlePointerMove_ (event) {\n    if (this.downPx_ &&\n        ((!this.freehand_ && this.shouldHandle_) ||\n        (this.freehand_ && !this.shouldHandle_))) {\n      var downPx = this.downPx_;\n      var clickPx = event.pixel;\n      var dx = downPx[0] - clickPx[0];\n      var dy = downPx[1] - clickPx[1];\n      var squaredDistance = dx * dx + dy * dy;\n      this.shouldHandle_ = this.freehand_ ?\n        squaredDistance > this.squaredClickTolerance_ :\n        squaredDistance <= this.squaredClickTolerance_;\n      if (!this.shouldHandle_) {\n        return true;\n      }\n    }\n\n    if (this.finishCoordinate_) {\n      this.modifyDrawing_(event);\n    } else {\n      this.createOrUpdateSketchPoint_(event);\n    }\n    return true;\n  };\n\n  /**\n   * Determine if an event is within the snapping tolerance of the start coord.\n   * @param {import(\"../MapBrowserEvent.js\").default} event Event.\n   * @return {boolean} The event is within the snapping tolerance of the start.\n   * @private\n   */\n  Draw.prototype.atFinish_ = function atFinish_ (event) {\n    var at = false;\n    if (this.sketchFeature_) {\n      var potentiallyDone = false;\n      var potentiallyFinishCoordinates = [this.finishCoordinate_];\n      if (this.mode_ === Mode.LINE_STRING) {\n        potentiallyDone = this.sketchCoords_.length > this.minPoints_;\n      } else if (this.mode_ === Mode.POLYGON) {\n        var sketchCoords = /** @type {PolyCoordType} */ (this.sketchCoords_);\n        potentiallyDone = sketchCoords[0].length > this.minPoints_;\n        potentiallyFinishCoordinates = [sketchCoords[0][0], sketchCoords[0][sketchCoords[0].length - 2]];\n      }\n      if (potentiallyDone) {\n        var map = event.map;\n        for (var i = 0, ii = potentiallyFinishCoordinates.length; i < ii; i++) {\n          var finishCoordinate = potentiallyFinishCoordinates[i];\n          var finishPixel = map.getPixelFromCoordinate(finishCoordinate);\n          var pixel = event.pixel;\n          var dx = pixel[0] - finishPixel[0];\n          var dy = pixel[1] - finishPixel[1];\n          var snapTolerance = this.freehand_ ? 1 : this.snapTolerance_;\n          at = Math.sqrt(dx * dx + dy * dy) <= snapTolerance;\n          if (at) {\n            this.finishCoordinate_ = finishCoordinate;\n            break;\n          }\n        }\n      }\n    }\n    return at;\n  };\n\n  /**\n   * @param {import(\"../MapBrowserEvent.js\").default} event Event.\n   * @private\n   */\n  Draw.prototype.createOrUpdateSketchPoint_ = function createOrUpdateSketchPoint_ (event) {\n    var coordinates = event.coordinate.slice();\n    if (!this.sketchPoint_) {\n      this.sketchPoint_ = new Feature(new Point(coordinates));\n      this.updateSketchFeatures_();\n    } else {\n      var sketchPointGeom = /** @type {Point} */ (this.sketchPoint_.getGeometry());\n      sketchPointGeom.setCoordinates(coordinates);\n    }\n  };\n\n  /**\n   * Start the drawing.\n   * @param {import(\"../MapBrowserEvent.js\").default} event Event.\n   * @private\n   */\n  Draw.prototype.startDrawing_ = function startDrawing_ (event) {\n    var start = event.coordinate;\n    this.finishCoordinate_ = start;\n    if (this.mode_ === Mode.POINT) {\n      this.sketchCoords_ = start.slice();\n    } else if (this.mode_ === Mode.POLYGON) {\n      this.sketchCoords_ = [[start.slice(), start.slice()]];\n      this.sketchLineCoords_ = this.sketchCoords_[0];\n    } else {\n      this.sketchCoords_ = [start.slice(), start.slice()];\n    }\n    if (this.sketchLineCoords_) {\n      this.sketchLine_ = new Feature(\n        new LineString(this.sketchLineCoords_));\n    }\n    var geometry = this.geometryFunction_(this.sketchCoords_);\n    this.sketchFeature_ = new Feature();\n    if (this.geometryName_) {\n      this.sketchFeature_.setGeometryName(this.geometryName_);\n    }\n    this.sketchFeature_.setGeometry(geometry);\n    this.updateSketchFeatures_();\n    this.dispatchEvent(new DrawEvent(DrawEventType.DRAWSTART, this.sketchFeature_));\n  };\n\n  /**\n   * Modify the drawing.\n   * @param {import(\"../MapBrowserEvent.js\").default} event Event.\n   * @private\n   */\n  Draw.prototype.modifyDrawing_ = function modifyDrawing_ (event) {\n    var coordinate = event.coordinate;\n    var geometry = /** @type {import(\"../geom/SimpleGeometry.js\").default} */ (this.sketchFeature_.getGeometry());\n    var coordinates, last;\n    if (this.mode_ === Mode.POINT) {\n      last = this.sketchCoords_;\n    } else if (this.mode_ === Mode.POLYGON) {\n      coordinates = /** @type {PolyCoordType} */ (this.sketchCoords_)[0];\n      last = coordinates[coordinates.length - 1];\n      if (this.atFinish_(event)) {\n        // snap to finish\n        coordinate = this.finishCoordinate_.slice();\n      }\n    } else {\n      coordinates = this.sketchCoords_;\n      last = coordinates[coordinates.length - 1];\n    }\n    last[0] = coordinate[0];\n    last[1] = coordinate[1];\n    this.geometryFunction_(/** @type {!LineCoordType} */ (this.sketchCoords_), geometry);\n    if (this.sketchPoint_) {\n      var sketchPointGeom = /** @type {Point} */ (this.sketchPoint_.getGeometry());\n      sketchPointGeom.setCoordinates(coordinate);\n    }\n    /** @type {LineString} */\n    var sketchLineGeom;\n    if (geometry.getType() == GeometryType.POLYGON &&\n        this.mode_ !== Mode.POLYGON) {\n      if (!this.sketchLine_) {\n        this.sketchLine_ = new Feature();\n      }\n      var ring = /** @type {Polygon} */ (geometry).getLinearRing(0);\n      sketchLineGeom = /** @type {LineString} */ (this.sketchLine_.getGeometry());\n      if (!sketchLineGeom) {\n        sketchLineGeom = new LineString(ring.getFlatCoordinates(), ring.getLayout());\n        this.sketchLine_.setGeometry(sketchLineGeom);\n      } else {\n        sketchLineGeom.setFlatCoordinates(\n          ring.getLayout(), ring.getFlatCoordinates());\n        sketchLineGeom.changed();\n      }\n    } else if (this.sketchLineCoords_) {\n      sketchLineGeom = /** @type {LineString} */ (this.sketchLine_.getGeometry());\n      sketchLineGeom.setCoordinates(this.sketchLineCoords_);\n    }\n    this.updateSketchFeatures_();\n  };\n\n  /**\n   * Add a new coordinate to the drawing.\n   * @param {import(\"../MapBrowserEvent.js\").default} event Event.\n   * @private\n   */\n  Draw.prototype.addToDrawing_ = function addToDrawing_ (event) {\n    var coordinate = event.coordinate;\n    var geometry = /** @type {import(\"../geom/SimpleGeometry.js\").default} */ (this.sketchFeature_.getGeometry());\n    var done;\n    var coordinates;\n    if (this.mode_ === Mode.LINE_STRING) {\n      this.finishCoordinate_ = coordinate.slice();\n      coordinates = /** @type {LineCoordType} */ (this.sketchCoords_);\n      if (coordinates.length >= this.maxPoints_) {\n        if (this.freehand_) {\n          coordinates.pop();\n        } else {\n          done = true;\n        }\n      }\n      coordinates.push(coordinate.slice());\n      this.geometryFunction_(coordinates, geometry);\n    } else if (this.mode_ === Mode.POLYGON) {\n      coordinates = /** @type {PolyCoordType} */ (this.sketchCoords_)[0];\n      if (coordinates.length >= this.maxPoints_) {\n        if (this.freehand_) {\n          coordinates.pop();\n        } else {\n          done = true;\n        }\n      }\n      coordinates.push(coordinate.slice());\n      if (done) {\n        this.finishCoordinate_ = coordinates[0];\n      }\n      this.geometryFunction_(this.sketchCoords_, geometry);\n    }\n    this.updateSketchFeatures_();\n    if (done) {\n      this.finishDrawing();\n    }\n  };\n\n  /**\n   * Remove last point of the feature currently being drawn.\n   * @api\n   */\n  Draw.prototype.removeLastPoint = function removeLastPoint () {\n    if (!this.sketchFeature_) {\n      return;\n    }\n    var geometry = /** @type {import(\"../geom/SimpleGeometry.js\").default} */ (this.sketchFeature_.getGeometry());\n    var coordinates;\n    /** @type {LineString} */\n    var sketchLineGeom;\n    if (this.mode_ === Mode.LINE_STRING) {\n      coordinates = /** @type {LineCoordType} */ (this.sketchCoords_);\n      coordinates.splice(-2, 1);\n      this.geometryFunction_(coordinates, geometry);\n      if (coordinates.length >= 2) {\n        this.finishCoordinate_ = coordinates[coordinates.length - 2].slice();\n      }\n    } else if (this.mode_ === Mode.POLYGON) {\n      coordinates = /** @type {PolyCoordType} */ (this.sketchCoords_)[0];\n      coordinates.splice(-2, 1);\n      sketchLineGeom = /** @type {LineString} */ (this.sketchLine_.getGeometry());\n      sketchLineGeom.setCoordinates(coordinates);\n      this.geometryFunction_(this.sketchCoords_, geometry);\n    }\n\n    if (coordinates.length === 0) {\n      this.finishCoordinate_ = null;\n    }\n\n    this.updateSketchFeatures_();\n  };\n\n  /**\n   * Stop drawing and add the sketch feature to the target layer.\n   * The {@link module:ol/interaction/Draw~DrawEventType.DRAWEND} event is\n   * dispatched before inserting the feature.\n   * @api\n   */\n  Draw.prototype.finishDrawing = function finishDrawing () {\n    var sketchFeature = this.abortDrawing_();\n    if (!sketchFeature) {\n      return;\n    }\n    var coordinates = this.sketchCoords_;\n    var geometry = /** @type {import(\"../geom/SimpleGeometry.js\").default} */ (sketchFeature.getGeometry());\n    if (this.mode_ === Mode.LINE_STRING) {\n      // remove the redundant last point\n      coordinates.pop();\n      this.geometryFunction_(coordinates, geometry);\n    } else if (this.mode_ === Mode.POLYGON) {\n      // remove the redundant last point in ring\n      /** @type {PolyCoordType} */ (coordinates)[0].pop();\n      this.geometryFunction_(coordinates, geometry);\n      coordinates = geometry.getCoordinates();\n    }\n\n    // cast multi-part geometries\n    if (this.type_ === GeometryType.MULTI_POINT) {\n      sketchFeature.setGeometry(new MultiPoint([/** @type {PointCoordType} */(coordinates)]));\n    } else if (this.type_ === GeometryType.MULTI_LINE_STRING) {\n      sketchFeature.setGeometry(new MultiLineString([/** @type {LineCoordType} */(coordinates)]));\n    } else if (this.type_ === GeometryType.MULTI_POLYGON) {\n      sketchFeature.setGeometry(new MultiPolygon([/** @type {PolyCoordType} */(coordinates)]));\n    }\n\n    // First dispatch event to allow full set up of feature\n    this.dispatchEvent(new DrawEvent(DrawEventType.DRAWEND, sketchFeature));\n\n    // Then insert feature\n    if (this.features_) {\n      this.features_.push(sketchFeature);\n    }\n    if (this.source_) {\n      this.source_.addFeature(sketchFeature);\n    }\n  };\n\n  /**\n   * Stop drawing without adding the sketch feature to the target layer.\n   * @return {Feature} The sketch feature (or null if none).\n   * @private\n   */\n  Draw.prototype.abortDrawing_ = function abortDrawing_ () {\n    this.finishCoordinate_ = null;\n    var sketchFeature = this.sketchFeature_;\n    if (sketchFeature) {\n      this.sketchFeature_ = null;\n      this.sketchPoint_ = null;\n      this.sketchLine_ = null;\n      /** @type {VectorSource} */ (this.overlay_.getSource()).clear(true);\n    }\n    return sketchFeature;\n  };\n\n  /**\n   * Extend an existing geometry by adding additional points. This only works\n   * on features with `LineString` geometries, where the interaction will\n   * extend lines by adding points to the end of the coordinates array.\n   * @param {!Feature} feature Feature to be extended.\n   * @api\n   */\n  Draw.prototype.extend = function extend (feature) {\n    var geometry = feature.getGeometry();\n    var lineString = /** @type {LineString} */ (geometry);\n    this.sketchFeature_ = feature;\n    this.sketchCoords_ = lineString.getCoordinates();\n    var last = this.sketchCoords_[this.sketchCoords_.length - 1];\n    this.finishCoordinate_ = last.slice();\n    this.sketchCoords_.push(last.slice());\n    this.updateSketchFeatures_();\n    this.dispatchEvent(new DrawEvent(DrawEventType.DRAWSTART, this.sketchFeature_));\n  };\n\n  /**\n   * Redraw the sketch features.\n   * @private\n   */\n  Draw.prototype.updateSketchFeatures_ = function updateSketchFeatures_ () {\n    var sketchFeatures = [];\n    if (this.sketchFeature_) {\n      sketchFeatures.push(this.sketchFeature_);\n    }\n    if (this.sketchLine_) {\n      sketchFeatures.push(this.sketchLine_);\n    }\n    if (this.sketchPoint_) {\n      sketchFeatures.push(this.sketchPoint_);\n    }\n    var overlaySource = /** @type {VectorSource} */ (this.overlay_.getSource());\n    overlaySource.clear(true);\n    overlaySource.addFeatures(sketchFeatures);\n  };\n\n  /**\n   * @private\n   */\n  Draw.prototype.updateState_ = function updateState_ () {\n    var map = this.getMap();\n    var active = this.getActive();\n    if (!map || !active) {\n      this.abortDrawing_();\n    }\n    this.overlay_.setMap(active ? map : null);\n  };\n\n  return Draw;\n}(PointerInteraction));\n\n\n/**\n * @return {import(\"../style/Style.js\").StyleFunction} Styles.\n */\nfunction getDefaultStyleFunction() {\n  var styles = createEditingStyle();\n  return function(feature, resolution) {\n    return styles[feature.getGeometry().getType()];\n  };\n}\n\n\n/**\n * Create a `geometryFunction` for `type: 'Circle'` that will create a regular\n * polygon with a user specified number of sides and start angle instead of an\n * `import(\"../geom/Circle.js\").Circle` geometry.\n * @param {number=} opt_sides Number of sides of the regular polygon. Default is\n *     32.\n * @param {number=} opt_angle Angle of the first point in radians. 0 means East.\n *     Default is the angle defined by the heading from the center of the\n *     regular polygon to the current pointer position.\n * @return {GeometryFunction} Function that draws a\n *     polygon.\n * @api\n */\nexport function createRegularPolygon(opt_sides, opt_angle) {\n  return function(coordinates, opt_geometry) {\n    var center = /** @type {LineCoordType} */ (coordinates)[0];\n    var end = /** @type {LineCoordType} */ (coordinates)[1];\n    var radius = Math.sqrt(\n      squaredCoordinateDistance(center, end));\n    var geometry = opt_geometry ? /** @type {Polygon} */ (opt_geometry) :\n      fromCircle(new Circle(center), opt_sides);\n    var angle = opt_angle;\n    if (!opt_angle) {\n      var x = end[0] - center[0];\n      var y = end[1] - center[1];\n      angle = Math.atan(y / x) - (x < 0 ? Math.PI : 0);\n    }\n    makeRegular(geometry, center, radius, angle);\n    return geometry;\n  };\n}\n\n\n/**\n * Create a `geometryFunction` that will create a box-shaped polygon (aligned\n * with the coordinate system axes).  Use this with the draw interaction and\n * `type: 'Circle'` to return a box instead of a circle geometry.\n * @return {GeometryFunction} Function that draws a box-shaped polygon.\n * @api\n */\nexport function createBox() {\n  return (\n    function(coordinates, opt_geometry) {\n      var extent = boundingExtent(/** @type {LineCoordType} */ (coordinates));\n      var boxCoordinates = [[\n        getBottomLeft(extent),\n        getBottomRight(extent),\n        getTopRight(extent),\n        getTopLeft(extent),\n        getBottomLeft(extent)\n      ]];\n      var geometry = opt_geometry;\n      if (geometry) {\n        geometry.setCoordinates(boxCoordinates);\n      } else {\n        geometry = new Polygon(boxCoordinates);\n      }\n      return geometry;\n    }\n  );\n}\n\n\n/**\n * Get the drawing mode.  The mode for mult-part geometries is the same as for\n * their single-part cousins.\n * @param {GeometryType} type Geometry type.\n * @return {Mode} Drawing mode.\n */\nfunction getMode(type) {\n  var mode;\n  if (type === GeometryType.POINT ||\n      type === GeometryType.MULTI_POINT) {\n    mode = Mode.POINT;\n  } else if (type === GeometryType.LINE_STRING ||\n      type === GeometryType.MULTI_LINE_STRING) {\n    mode = Mode.LINE_STRING;\n  } else if (type === GeometryType.POLYGON ||\n      type === GeometryType.MULTI_POLYGON) {\n    mode = Mode.POLYGON;\n  } else if (type === GeometryType.CIRCLE) {\n    mode = Mode.CIRCLE;\n  }\n  return (\n    /** @type {!Mode} */ (mode)\n  );\n}\n\n\nexport default Draw;\n\n//# sourceMappingURL=Draw.js.map","/**\n * @module ol/control/MessureControl\n */\nimport Control from 'ol/control/Control.js';\nimport {CLASS_CONTROL, CLASS_UNSELECTABLE, CLASS_UNSUPPORTED} from 'ol/css.js';\nimport {replaceNode} from 'ol/dom.js';\nimport {listen} from 'ol/events.js';\nimport EventType from 'ol/events/EventType.js';\nimport {Vector as VectorSource} from 'ol/source';\nimport Overlay from 'ol/Overlay.js';\nimport {LineString, Polygon} from 'ol/geom.js';\nimport Draw from 'ol/interaction/Draw.js';\nimport {Circle as CircleStyle, Fill, Stroke, Style} from 'ol/style.js';\nimport {getArea, getLength} from 'ol/sphere.js';\nimport {unByKey} from 'ol/Observable.js';\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-full-screen'] CSS class name.\n * @property {string|Text} [label='\\u2922'] Text label to use for the button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string|Text} [labelActive='\\u00d7'] Text label to use for the\n * button when full-screen is active.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string} [tipLabel='Toggle full-screen'] Text label to use for the button tip.\n * @property {boolean} [keys=false] Full keyboard access.\n * @property {HTMLElement|string} [target] Specify a target if you want the\n * control to be rendered outside of the map's viewport.\n * @property {HTMLElement|string} [source] The element to be displayed\n * fullscreen. When not provided, the element containing the map viewport will\n * be displayed fullscreen.\n */\n\n\n/**\n * @classdesc\n * Provides a button that when clicked fills up the full screen with the map.\n * The full screen source element is by default the element containing the map viewport unless\n * overridden by providing the `source` option. In which case, the dom\n * element introduced using this parameter will be displayed in full screen.\n *\n * When in full screen mode, a close button is shown to exit full screen mode.\n * The [Fullscreen API](http://www.w3.org/TR/fullscreen/) is used to\n * toggle the map in full screen mode.\n *\n * @api\n */\nvar MessureControl = /*@__PURE__*/(function (Control) {\n\tfunction MessureControl(opt_options) {\n\n\t\tvar self = this;\n\t\tvar options = opt_options ? opt_options : {};\n\n\t\tControl.call(this, {\n\t\t\telement: document.createElement('div'),\n\t\t\ttarget: options.target\n\t\t});\n\n\t\tthis.active_ = options.active ? options.active : false;\n\n\t\t/**\n\t\t * @private\n\t\t * @type {string}\n\t\t */\n\t\tthis.cssClassName_ = options.className !== undefined ? options.className :\n\t\t\t'ol-messure';\n\n\t\tvar label = options.label !== undefined ? options.label : '\\ud83d\\udccf';\n\n\t\t/**\n\t\t * @private\n\t\t * @type {Text}\n\t\t */\n\t\tthis.labelNode_ = typeof label === 'string' ?\n\t\t\tdocument.createTextNode(label) : label;\n\n\t\tvar labelActive = options.labelActive !== undefined ? options.labelActive : '\\ud83d\\udccf';\n\n\t\t/**\n\t\t * @private\n\t\t * @type {Text}\n\t\t */\n\t\tthis.labelActiveNode_ = typeof labelActive === 'string' ?\n\t\t\tdocument.createTextNode(labelActive) : labelActive;\n\n\t\t/**\n\t\t * @private\n\t\t * @type {HTMLElement}\n\t\t */\n\t\tthis.button_ = document.createElement('button');\n\n\t\tvar tipLabel = options.tipLabel ? options.tipLabel : 'messure distance';\n\t\tthis.setClassName_(this.button_, this.active_);\n\t\tthis.button_.setAttribute('type', 'button');\n\t\tthis.button_.title = tipLabel;\n\t\tthis.button_.appendChild(this.labelNode_);\n\n\t\tlisten(this.button_, EventType.CLICK,\n\t\t\tthis.handleClick_, this);\n\n\t\tvar cssClasses = this.cssClassName_ + ' ' + CLASS_UNSELECTABLE +\n\t\t\t\t' ' + CLASS_CONTROL;\n\t\tvar element = this.element;\n\t\telement.className = cssClasses;\n\t\telement.appendChild(this.button_);\n\n\t\t/**\n\t\t * @private\n\t\t * @type {boolean}\n\t\t * /\n\t\tthis.keys_ = options.keys !== undefined ? options.keys : false;*/\n\n\t\t/**\n\t\t * @private\n\t\t * @type {HTMLElement|string|undefined}\n\t\t */\n\t\tthis.source_ = options.source ? options.source : new VectorSource();\n\n\n\t\t/**\n\t\t * Currently drawn feature.\n\t\t * @type {module:ol/Feature~Feature}\n\t\t */\n\t\tthis.sketch;\n\n\n\t\t/**\n\t\t * The help tooltip element.\n\t\t * @type {Element}\n\t\t */\n\t\tthis.helpTooltipElement;\n\n\n\t\t/**\n\t\t * Overlay to show the help messages.\n\t\t * @type {module:ol/Overlay}\n\t\t */\n\t\tthis.helpTooltip;\n\n\n\t\t/**\n\t\t * The measure tooltip element.\n\t\t * @type {Element}\n\t\t */\n\t\tthis.measureTooltipElement;\n\n\n\t\t/**\n\t\t * Overlay to show the measurement.\n\t\t * @type {module:ol/Overlay}\n\t\t */\n\t\tthis.measureTooltip;\n\n\n\t\t/**\n\t\t * Message to show when the user is drawing a polygon.\n\t\t * @type {string}\n\t\t */\n\t\tthis.continuePolygonMsg = 'Click to continue drawing the polygon';\n\n\n\t\t/**\n\t\t * Message to show when the user is drawing a line.\n\t\t * @type {string}\n\t\t */\n\t\tthis.continueLineMsg = 'Click to continue drawing the line';\n\n\t\tvar type = (false ? 'Polygon' : 'LineString');\n\t\tthis.draw_ = new Draw({\n\t\t\tsource: this.source_,\n\t\t\ttype: type,\n\t\t\tstyle: new Style({\n\t\t\t\tfill: new Fill({\n\t\t\t\t\tcolor: 'rgba(255, 255, 255, 0.2)'\n\t\t\t\t}),\n\t\t\t\tstroke: new Stroke({\n\t\t\t\t\tcolor: 'rgba(0, 0, 0, 0.5)',\n\t\t\t\t\tlineDash: [10, 10],\n\t\t\t\t\twidth: 2\n\t\t\t\t}),\n\t\t\t\timage: new CircleStyle({\n\t\t\t\t\tradius: 5,\n\t\t\t\t\tstroke: new Stroke({\n\t\t\t\t\t\tcolor: 'rgba(0, 0, 0, 0.7)'\n\t\t\t\t\t}),\n\t\t\t\t\tfill: new Fill({\n\t\t\t\t\t\tcolor: 'rgba(255, 255, 255, 0.2)'\n\t\t\t\t\t})\n\t\t\t\t})\n\t\t\t})\n\t\t});\n\n\t\tvar listener;\n\t\tthis.draw_.on('drawstart',\n\t\t\tfunction(evt) {\n\t\t\t\t// set sketch\n\t\t\t\tself.sketch = evt.feature;\n\n\t\t\t\t/** @type {module:ol/coordinate~Coordinate|undefined} */\n\t\t\t\tvar tooltipCoord = evt.coordinate;\n\n\t\t\t\tlistener = self.sketch.getGeometry().on('change', function(evt) {\n\t\t\t\t\tvar geom = evt.target;\n\t\t\t\t\tvar output;\n\t\t\t\t\tif (geom instanceof Polygon) {\n\t\t\t\t\t\toutput = formatArea(geom);\n\t\t\t\t\t\ttooltipCoord = geom.getInteriorPoint().getCoordinates();\n\t\t\t\t\t} else if (geom instanceof LineString) {\n\t\t\t\t\t\toutput = self.formatLength(geom);\n\t\t\t\t\t\ttooltipCoord = geom.getLastCoordinate();\n\t\t\t\t\t}\n\t\t\t\t\tself.measureTooltipElement.innerHTML = output;\n\t\t\t\t\tself.measureTooltip.setPosition(tooltipCoord);\n\t\t\t\t});\n\t\t\t});\n\n\t\tthis.draw_.on('drawend',\n\t\t\tfunction() {\n\t\t\t\tself.measureTooltipElement.className = 'tooltip tooltip-static';\n\t\t\t\tself.measureTooltip.setOffset([0, -7]);\n\t\t\t\t// unset sketch\n\t\t\t\tself.sketch = null;\n\t\t\t\t// unset tooltip so that a new one can be created\n\t\t\t\tself.measureTooltipElement = null;\n\t\t\t\tself.createMeasureTooltip();\n\t\t\t\tunByKey(listener);\n\t\t\t});\n\t\n\t}\n\n\tif ( Control ) MessureControl.__proto__ = Control;\n\tMessureControl.prototype = Object.create( Control && Control.prototype );\n\tMessureControl.prototype.constructor = MessureControl;\n\n\t/**\n\t * @param {MouseEvent} event The event to handle\n\t * @private\n\t */\n\tMessureControl.prototype.handleClick_ = function handleClick_ (event) {\n\t\tevent.preventDefault();\n\t\tthis.handleMessureControl_();\n\t};\n\n\n\tMessureControl.prototype.isActive = function isActive () {\n\t\treturn this.active_;\n\t}\n\n\t/**\n\t *\n\t */\n\tMessureControl.prototype.activate = function activate () {\n\t\tif (this.isActive()) {\n\t\t\treturn;\n\t\t}\n\t\tvar map = this.getMap();\n\t\tvar self = this;\n\t\tthis.pointerMoveHandler_ = (e) => self.pointerMoveHandler(e);\n\t\tmap.on('pointermove', this.pointerMoveHandler_);\n\t\tmap.addInteraction(this.draw_);\n\n\t\tthis.active_ = true;\n\t}\n\n\t/**\n\t *\n\t */\n\tMessureControl.prototype.deactivate = function deactivate () {\n\t\tvar map = this.getMap();\n\t\tmap.un('pointermove', this.pointerMoveHandler_);\n\t\tmap.removeInteraction(this.draw_);\n\t\tthis.helpTooltipElement.classList.add('hidden');\n\t\tthis.active_ = true;\n\t}\n\n\t/**\n\t * Handle pointer move.\n\t * @param {module:ol/MapBrowserEvent~MapBrowserEvent} evt The event.\n\t */\n\tMessureControl.prototype.pointerMoveHandler = function pointerMoveHandler (evt) {\n\t\tif (evt.dragging) {\n\t\t\treturn;\n\t\t}\n\t\t/** @type {string} */\n\t\tvar helpMsg = 'Click to start drawing';\n\n\t\tif (this.sketch) {\n\t\t\tvar geom = (this.sketch.getGeometry());\n\t\t\tif (geom instanceof Polygon) {\n\t\t\t\thelpMsg = this.continuePolygonMsg;\n\t\t\t} else if (geom instanceof LineString) {\n\t\t\t\thelpMsg = this.continueLineMsg;\n\t\t\t}\n\t\t}\n\n\t\tthis.helpTooltipElement.innerHTML = helpMsg;\n\t\tthis.helpTooltip.setPosition(evt.coordinate);\n\n\t\tthis.helpTooltipElement.classList.remove('hidden');\n\t};\n\n\t/**\n\t * @param {HTMLElement} element Target element\n\t * @param {boolean} fullscreen True if fullscreen class name should be active\n\t * @private\n\t */\n\tMessureControl.prototype.setClassName_ = function setClassName_ (element, fullscreen) {\n\t\tvar activeClassName = this.cssClassName_ + '-true';\n\t\tvar inactiveClassName = this.cssClassName_ + '-false';\n\t\tvar nextClassName = fullscreen ? activeClassName : inactiveClassName;\n\t\telement.classList.remove(activeClassName);\n\t\telement.classList.remove(inactiveClassName);\n\t\telement.classList.add(nextClassName);\n\t};\n\n\t/**\n\t * @inheritDoc\n\t * @api\n\t */\n\tMessureControl.prototype.setMap = function setMap (map) {\n\t\tControl.prototype.setMap.call(this, map);\n\t\tvar self = this;\n\n\t\tif (map) {\n\t\t\tthis.createHelpTooltip();\n\t\t\tmap.getViewport().addEventListener('mouseout', function() {\n\t\t\t\tself.helpTooltipElement.classList.add('hidden');\n\t\t\t});\n\t\t\tthis.createMeasureTooltip();\n\t\t\tthis.createHelpTooltip();\n\t\t}\n\t};\n\n\n\t/**\n\t * Creates a new help tooltip\n\t */\n\tMessureControl.prototype.createHelpTooltip = function createHelpTooltip() {\n\t\tif (this.helpTooltipElement) {\n\t\t\tthis.helpTooltipElement.parentNode.removeChild(this.helpTooltipElement);\n\t\t}\n\t\tthis.helpTooltipElement = document.createElement('div');\n\t\tthis.helpTooltipElement.className = 'tooltip hidden';\n\t\tthis.helpTooltip = new Overlay({\n\t\t\telement: this.helpTooltipElement,\n\t\t\toffset: [15, 0],\n\t\t\tpositioning: 'center-left'\n\t\t});\n\t\tthis.getMap().addOverlay(this.helpTooltip);\n\t}\n\n\t/**\n\t * @private\n\t */\n\tMessureControl.prototype.handleMessureControl_ = function handleMessureControl_ () {\n\t\tvar map = this.getMap();\n\t\tvar self = this;\n\t\tif (!map) {\n\t\t\treturn;\n\t\t}\n\t\tif (this.isActive()) {\n\t\t\t//exitMessureControl();\n\t\t\tthis.deactivate();\n\t\t} else {\n\t\t\tthis.activate();\n\t\t}\n\t};\n\n\t/**\n\t * Creates a new measure tooltip\n\t */\n\tMessureControl.prototype.createMeasureTooltip = function createMeasureTooltip() {\n\t\tvar map = this.getMap();\n\t\tif (this.measureTooltipElement) {\n\t\t\tmeasureTooltipElement.parentNode.removeChild(measureTooltipElement);\n\t\t}\n\t\tthis.measureTooltipElement = document.createElement('div');\n\t\tthis.measureTooltipElement.className = 'tooltip tooltip-measure';\n\t\tthis.measureTooltip = new Overlay({\n\t\t\telement: this.measureTooltipElement,\n\t\t\toffset: [0, -15],\n\t\t\tpositioning: 'bottom-center'\n\t\t});\n\t\tmap.addOverlay(this.measureTooltip);\n\t}\n\n\t\t/**\n\t\t * Format length output.\n\t\t * @param {module:ol/geom/LineString~LineString} line The line.\n\t\t * @return {string} The formatted length.\n\t\t */\n\t\tMessureControl.prototype.formatLength = function formatLength(line) {\n\t\t\tvar length = getLength(line);\n\t\t\tvar output;\n\t\t\tif (length > 100) {\n\t\t\t\toutput = (Math.round(length / 1000 * 100) / 100) +\n\t\t\t\t\t\t' ' + 'km';\n\t\t\t} else {\n\t\t\t\toutput = (Math.round(length * 100) / 100) +\n\t\t\t\t\t\t' ' + 'm';\n\t\t\t}\n\t\t\treturn output;\n\t\t};\n\n\treturn MessureControl;\n}(Control));\n\nexport default MessureControl;\n\n//# sourceMappingURL=MessureControl.js.map\n","/**\n * @module ol/layer/TileProperty\n */\n\n/**\n * @enum {string}\n */\nexport default {\n  PRELOAD: 'preload',\n  USE_INTERIM_TILES_ON_ERROR: 'useInterimTilesOnError'\n};\n\n//# sourceMappingURL=TileProperty.js.map","/**\n * @module ol/layer/Tile\n */\nimport LayerType from '../LayerType.js';\nimport Layer from './Layer.js';\nimport TileProperty from './TileProperty.js';\nimport {assign} from '../obj.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {import(\"../extent.js\").Extent} [extent] The bounding extent for layer rendering.  The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex] The z-index for layer rendering.  At rendering time, the layers\n * will be ordered, first by Z-index and then by position. When `undefined`, a `zIndex` of 0 is assumed\n * for layers that are added to the map's `layers` collection, or `Infinity` when the layer's `setMap()`\n * method was used.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {number} [preload=0] Preload. Load low-resolution tiles up to `preload` levels. `0`\n * means no preloading.\n * @property {import(\"../source/Tile.js\").default} [source] Source for this layer.\n * @property {import(\"../PluggableMap.js\").default} [map] Sets the layer as overlay on a map. The map will not manage\n * this layer in its layers collection, and the layer will be rendered on top. This is useful for\n * temporary layers. The standard way to add a layer to a map and have it managed by the map is to\n * use {@link module:ol/Map#addLayer}.\n * @property {boolean} [useInterimTilesOnError=true] Use interim tiles on error.\n */\n\n/**\n * @classdesc\n * For layer sources that provide pre-rendered, tiled images in grids that are\n * organized by zoom levels for specific resolutions.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @api\n */\nvar TileLayer = /*@__PURE__*/(function (Layer) {\n  function TileLayer(opt_options) {\n    var options = opt_options ? opt_options : {};\n\n    var baseOptions = assign({}, options);\n\n    delete baseOptions.preload;\n    delete baseOptions.useInterimTilesOnError;\n    Layer.call(this, baseOptions);\n\n    this.setPreload(options.preload !== undefined ? options.preload : 0);\n    this.setUseInterimTilesOnError(options.useInterimTilesOnError !== undefined ?\n      options.useInterimTilesOnError : true);\n\n    /**\n    * The layer type.\n    * @protected\n    * @type {import(\"../LayerType.js\").default}\n    */\n    this.type = LayerType.TILE;\n\n  }\n\n  if ( Layer ) TileLayer.__proto__ = Layer;\n  TileLayer.prototype = Object.create( Layer && Layer.prototype );\n  TileLayer.prototype.constructor = TileLayer;\n\n  /**\n  * Return the level as number to which we will preload tiles up to.\n  * @return {number} The level to preload tiles up to.\n  * @observable\n  * @api\n  */\n  TileLayer.prototype.getPreload = function getPreload () {\n    return /** @type {number} */ (this.get(TileProperty.PRELOAD));\n  };\n\n  /**\n  * Set the level as number to which we will preload tiles up to.\n  * @param {number} preload The level to preload tiles up to.\n  * @observable\n  * @api\n  */\n  TileLayer.prototype.setPreload = function setPreload (preload) {\n    this.set(TileProperty.PRELOAD, preload);\n  };\n\n  /**\n  * Whether we use interim tiles on error.\n  * @return {boolean} Use interim tiles on error.\n  * @observable\n  * @api\n  */\n  TileLayer.prototype.getUseInterimTilesOnError = function getUseInterimTilesOnError () {\n    return /** @type {boolean} */ (this.get(TileProperty.USE_INTERIM_TILES_ON_ERROR));\n  };\n\n  /**\n  * Set whether we use interim tiles on error.\n  * @param {boolean} useInterimTilesOnError Use interim tiles on error.\n  * @observable\n  * @api\n  */\n  TileLayer.prototype.setUseInterimTilesOnError = function setUseInterimTilesOnError (useInterimTilesOnError) {\n    this.set(TileProperty.USE_INTERIM_TILES_ON_ERROR, useInterimTilesOnError);\n  };\n\n  return TileLayer;\n}(Layer));\n\n\n/**\n * Return the associated {@link module:ol/source/Tile tilesource} of the layer.\n * @function\n * @return {import(\"../source/Tile.js\").default} Source.\n * @api\n */\nTileLayer.prototype.getSource;\n\n\nexport default TileLayer;\n\n//# sourceMappingURL=Tile.js.map","/**\n * @module ol/reproj\n */\nimport {createCanvasContext2D} from './dom.js';\nimport {containsCoordinate, createEmpty, extend, getHeight, getTopLeft, getWidth} from './extent.js';\nimport {solveLinearSystem} from './math.js';\nimport {getPointResolution, transform} from './proj.js';\n\n\n/**\n * Calculates ideal resolution to use from the source in order to achieve\n * pixel mapping as close as possible to 1:1 during reprojection.\n * The resolution is calculated regardless of what resolutions\n * are actually available in the dataset (TileGrid, Image, ...).\n *\n * @param {import(\"./proj/Projection.js\").default} sourceProj Source projection.\n * @param {import(\"./proj/Projection.js\").default} targetProj Target projection.\n * @param {import(\"./coordinate.js\").Coordinate} targetCenter Target center.\n * @param {number} targetResolution Target resolution.\n * @return {number} The best resolution to use. Can be +-Infinity, NaN or 0.\n */\nexport function calculateSourceResolution(sourceProj, targetProj,\n  targetCenter, targetResolution) {\n\n  var sourceCenter = transform(targetCenter, targetProj, sourceProj);\n\n  // calculate the ideal resolution of the source data\n  var sourceResolution = getPointResolution(targetProj, targetResolution, targetCenter);\n\n  var targetMetersPerUnit = targetProj.getMetersPerUnit();\n  if (targetMetersPerUnit !== undefined) {\n    sourceResolution *= targetMetersPerUnit;\n  }\n  var sourceMetersPerUnit = sourceProj.getMetersPerUnit();\n  if (sourceMetersPerUnit !== undefined) {\n    sourceResolution /= sourceMetersPerUnit;\n  }\n\n  // Based on the projection properties, the point resolution at the specified\n  // coordinates may be slightly different. We need to reverse-compensate this\n  // in order to achieve optimal results.\n\n  var sourceExtent = sourceProj.getExtent();\n  if (!sourceExtent || containsCoordinate(sourceExtent, sourceCenter)) {\n    var compensationFactor = getPointResolution(sourceProj, sourceResolution, sourceCenter) /\n        sourceResolution;\n    if (isFinite(compensationFactor) && compensationFactor > 0) {\n      sourceResolution /= compensationFactor;\n    }\n  }\n\n  return sourceResolution;\n}\n\n\n/**\n * Enlarge the clipping triangle point by 1 pixel to ensure the edges overlap\n * in order to mask gaps caused by antialiasing.\n *\n * @param {number} centroidX Centroid of the triangle (x coordinate in pixels).\n * @param {number} centroidY Centroid of the triangle (y coordinate in pixels).\n * @param {number} x X coordinate of the point (in pixels).\n * @param {number} y Y coordinate of the point (in pixels).\n * @return {import(\"./coordinate.js\").Coordinate} New point 1 px farther from the centroid.\n */\nfunction enlargeClipPoint(centroidX, centroidY, x, y) {\n  var dX = x - centroidX;\n  var dY = y - centroidY;\n  var distance = Math.sqrt(dX * dX + dY * dY);\n  return [Math.round(x + dX / distance), Math.round(y + dY / distance)];\n}\n\n\n/**\n * Renders the source data into new canvas based on the triangulation.\n *\n * @param {number} width Width of the canvas.\n * @param {number} height Height of the canvas.\n * @param {number} pixelRatio Pixel ratio.\n * @param {number} sourceResolution Source resolution.\n * @param {import(\"./extent.js\").Extent} sourceExtent Extent of the data source.\n * @param {number} targetResolution Target resolution.\n * @param {import(\"./extent.js\").Extent} targetExtent Target extent.\n * @param {import(\"./reproj/Triangulation.js\").default} triangulation\n * Calculated triangulation.\n * @param {Array<{extent: import(\"./extent.js\").Extent,\n *                 image: (HTMLCanvasElement|HTMLImageElement|HTMLVideoElement)}>} sources\n * Array of sources.\n * @param {number} gutter Gutter of the sources.\n * @param {boolean=} opt_renderEdges Render reprojection edges.\n * @return {HTMLCanvasElement} Canvas with reprojected data.\n */\nexport function render(width, height, pixelRatio,\n  sourceResolution, sourceExtent, targetResolution, targetExtent,\n  triangulation, sources, gutter, opt_renderEdges) {\n\n  var context = createCanvasContext2D(Math.round(pixelRatio * width),\n    Math.round(pixelRatio * height));\n\n  if (sources.length === 0) {\n    return context.canvas;\n  }\n\n  context.scale(pixelRatio, pixelRatio);\n\n  var sourceDataExtent = createEmpty();\n  sources.forEach(function(src, i, arr) {\n    extend(sourceDataExtent, src.extent);\n  });\n\n  var canvasWidthInUnits = getWidth(sourceDataExtent);\n  var canvasHeightInUnits = getHeight(sourceDataExtent);\n  var stitchContext = createCanvasContext2D(\n    Math.round(pixelRatio * canvasWidthInUnits / sourceResolution),\n    Math.round(pixelRatio * canvasHeightInUnits / sourceResolution));\n\n  var stitchScale = pixelRatio / sourceResolution;\n\n  sources.forEach(function(src, i, arr) {\n    var xPos = src.extent[0] - sourceDataExtent[0];\n    var yPos = -(src.extent[3] - sourceDataExtent[3]);\n    var srcWidth = getWidth(src.extent);\n    var srcHeight = getHeight(src.extent);\n\n    stitchContext.drawImage(\n      src.image,\n      gutter, gutter,\n      src.image.width - 2 * gutter, src.image.height - 2 * gutter,\n      xPos * stitchScale, yPos * stitchScale,\n      srcWidth * stitchScale, srcHeight * stitchScale);\n  });\n\n  var targetTopLeft = getTopLeft(targetExtent);\n\n  triangulation.getTriangles().forEach(function(triangle, i, arr) {\n    /* Calculate affine transform (src -> dst)\n     * Resulting matrix can be used to transform coordinate\n     * from `sourceProjection` to destination pixels.\n     *\n     * To optimize number of context calls and increase numerical stability,\n     * we also do the following operations:\n     * trans(-topLeftExtentCorner), scale(1 / targetResolution), scale(1, -1)\n     * here before solving the linear system so [ui, vi] are pixel coordinates.\n     *\n     * Src points: xi, yi\n     * Dst points: ui, vi\n     * Affine coefficients: aij\n     *\n     * | x0 y0 1  0  0 0 |   |a00|   |u0|\n     * | x1 y1 1  0  0 0 |   |a01|   |u1|\n     * | x2 y2 1  0  0 0 | x |a02| = |u2|\n     * |  0  0 0 x0 y0 1 |   |a10|   |v0|\n     * |  0  0 0 x1 y1 1 |   |a11|   |v1|\n     * |  0  0 0 x2 y2 1 |   |a12|   |v2|\n     */\n    var source = triangle.source;\n    var target = triangle.target;\n    var x0 = source[0][0], y0 = source[0][1];\n    var x1 = source[1][0], y1 = source[1][1];\n    var x2 = source[2][0], y2 = source[2][1];\n    var u0 = (target[0][0] - targetTopLeft[0]) / targetResolution;\n    var v0 = -(target[0][1] - targetTopLeft[1]) / targetResolution;\n    var u1 = (target[1][0] - targetTopLeft[0]) / targetResolution;\n    var v1 = -(target[1][1] - targetTopLeft[1]) / targetResolution;\n    var u2 = (target[2][0] - targetTopLeft[0]) / targetResolution;\n    var v2 = -(target[2][1] - targetTopLeft[1]) / targetResolution;\n\n    // Shift all the source points to improve numerical stability\n    // of all the subsequent calculations. The [x0, y0] is used here.\n    // This is also used to simplify the linear system.\n    var sourceNumericalShiftX = x0;\n    var sourceNumericalShiftY = y0;\n    x0 = 0;\n    y0 = 0;\n    x1 -= sourceNumericalShiftX;\n    y1 -= sourceNumericalShiftY;\n    x2 -= sourceNumericalShiftX;\n    y2 -= sourceNumericalShiftY;\n\n    var augmentedMatrix = [\n      [x1, y1, 0, 0, u1 - u0],\n      [x2, y2, 0, 0, u2 - u0],\n      [0, 0, x1, y1, v1 - v0],\n      [0, 0, x2, y2, v2 - v0]\n    ];\n    var affineCoefs = solveLinearSystem(augmentedMatrix);\n    if (!affineCoefs) {\n      return;\n    }\n\n    context.save();\n    context.beginPath();\n    var centroidX = (u0 + u1 + u2) / 3;\n    var centroidY = (v0 + v1 + v2) / 3;\n    var p0 = enlargeClipPoint(centroidX, centroidY, u0, v0);\n    var p1 = enlargeClipPoint(centroidX, centroidY, u1, v1);\n    var p2 = enlargeClipPoint(centroidX, centroidY, u2, v2);\n\n    context.moveTo(p1[0], p1[1]);\n    context.lineTo(p0[0], p0[1]);\n    context.lineTo(p2[0], p2[1]);\n    context.clip();\n\n    context.transform(\n      affineCoefs[0], affineCoefs[2], affineCoefs[1], affineCoefs[3], u0, v0);\n\n    context.translate(sourceDataExtent[0] - sourceNumericalShiftX,\n      sourceDataExtent[3] - sourceNumericalShiftY);\n\n    context.scale(sourceResolution / pixelRatio,\n      -sourceResolution / pixelRatio);\n\n    context.drawImage(stitchContext.canvas, 0, 0);\n    context.restore();\n  });\n\n  if (opt_renderEdges) {\n    context.save();\n\n    context.strokeStyle = 'black';\n    context.lineWidth = 1;\n\n    triangulation.getTriangles().forEach(function(triangle, i, arr) {\n      var target = triangle.target;\n      var u0 = (target[0][0] - targetTopLeft[0]) / targetResolution;\n      var v0 = -(target[0][1] - targetTopLeft[1]) / targetResolution;\n      var u1 = (target[1][0] - targetTopLeft[0]) / targetResolution;\n      var v1 = -(target[1][1] - targetTopLeft[1]) / targetResolution;\n      var u2 = (target[2][0] - targetTopLeft[0]) / targetResolution;\n      var v2 = -(target[2][1] - targetTopLeft[1]) / targetResolution;\n\n      context.beginPath();\n      context.moveTo(u1, v1);\n      context.lineTo(u0, v0);\n      context.lineTo(u2, v2);\n      context.closePath();\n      context.stroke();\n    });\n\n    context.restore();\n  }\n  return context.canvas;\n}\n\n//# sourceMappingURL=reproj.js.map","/**\n * @module ol/reproj/Triangulation\n */\nimport {boundingExtent, createEmpty, extendCoordinate, getBottomLeft, getBottomRight,\n  getTopLeft, getTopRight, getWidth, intersects} from '../extent.js';\nimport {modulo} from '../math.js';\nimport {getTransform} from '../proj.js';\n\n\n/**\n * Single triangle; consists of 3 source points and 3 target points.\n * @typedef {Object} Triangle\n * @property {Array<import(\"../coordinate.js\").Coordinate>} source\n * @property {Array<import(\"../coordinate.js\").Coordinate>} target\n */\n\n\n/**\n * Maximum number of subdivision steps during raster reprojection triangulation.\n * Prevents high memory usage and large number of proj4 calls (for certain\n * transformations and areas). At most `2*(2^this)` triangles are created for\n * each triangulated extent (tile/image).\n * @type {number}\n */\nvar MAX_SUBDIVISION = 10;\n\n\n/**\n * Maximum allowed size of triangle relative to world width. When transforming\n * corners of world extent between certain projections, the resulting\n * triangulation seems to have zero error and no subdivision is performed. If\n * the triangle width is more than this (relative to world width; 0-1),\n * subdivison is forced (up to `MAX_SUBDIVISION`). Default is `0.25`.\n * @type {number}\n */\nvar MAX_TRIANGLE_WIDTH = 0.25;\n\n\n/**\n * @classdesc\n * Class containing triangulation of the given target extent.\n * Used for determining source data and the reprojection itself.\n */\nvar Triangulation = function Triangulation(sourceProj, targetProj, targetExtent, maxSourceExtent, errorThreshold) {\n\n  /**\n   * @type {import(\"../proj/Projection.js\").default}\n   * @private\n   */\n  this.sourceProj_ = sourceProj;\n\n  /**\n   * @type {import(\"../proj/Projection.js\").default}\n   * @private\n   */\n  this.targetProj_ = targetProj;\n\n  /** @type {!Object<string, import(\"../coordinate.js\").Coordinate>} */\n  var transformInvCache = {};\n  var transformInv = getTransform(this.targetProj_, this.sourceProj_);\n\n  /**\n   * @param {import(\"../coordinate.js\").Coordinate} c A coordinate.\n   * @return {import(\"../coordinate.js\").Coordinate} Transformed coordinate.\n   * @private\n   */\n  this.transformInv_ = function(c) {\n    var key = c[0] + '/' + c[1];\n    if (!transformInvCache[key]) {\n      transformInvCache[key] = transformInv(c);\n    }\n    return transformInvCache[key];\n  };\n\n  /**\n   * @type {import(\"../extent.js\").Extent}\n   * @private\n   */\n  this.maxSourceExtent_ = maxSourceExtent;\n\n  /**\n   * @type {number}\n   * @private\n   */\n  this.errorThresholdSquared_ = errorThreshold * errorThreshold;\n\n  /**\n   * @type {Array<Triangle>}\n   * @private\n   */\n  this.triangles_ = [];\n\n  /**\n   * Indicates that the triangulation crosses edge of the source projection.\n   * @type {boolean}\n   * @private\n   */\n  this.wrapsXInSource_ = false;\n\n  /**\n   * @type {boolean}\n   * @private\n   */\n  this.canWrapXInSource_ = this.sourceProj_.canWrapX() &&\n      !!maxSourceExtent &&\n      !!this.sourceProj_.getExtent() &&\n      (getWidth(maxSourceExtent) == getWidth(this.sourceProj_.getExtent()));\n\n  /**\n   * @type {?number}\n   * @private\n   */\n  this.sourceWorldWidth_ = this.sourceProj_.getExtent() ?\n    getWidth(this.sourceProj_.getExtent()) : null;\n\n  /**\n   * @type {?number}\n   * @private\n   */\n  this.targetWorldWidth_ = this.targetProj_.getExtent() ?\n    getWidth(this.targetProj_.getExtent()) : null;\n\n  var destinationTopLeft = getTopLeft(targetExtent);\n  var destinationTopRight = getTopRight(targetExtent);\n  var destinationBottomRight = getBottomRight(targetExtent);\n  var destinationBottomLeft = getBottomLeft(targetExtent);\n  var sourceTopLeft = this.transformInv_(destinationTopLeft);\n  var sourceTopRight = this.transformInv_(destinationTopRight);\n  var sourceBottomRight = this.transformInv_(destinationBottomRight);\n  var sourceBottomLeft = this.transformInv_(destinationBottomLeft);\n\n  this.addQuad_(\n    destinationTopLeft, destinationTopRight,\n    destinationBottomRight, destinationBottomLeft,\n    sourceTopLeft, sourceTopRight, sourceBottomRight, sourceBottomLeft,\n    MAX_SUBDIVISION);\n\n  if (this.wrapsXInSource_) {\n    var leftBound = Infinity;\n    this.triangles_.forEach(function(triangle, i, arr) {\n      leftBound = Math.min(leftBound,\n        triangle.source[0][0], triangle.source[1][0], triangle.source[2][0]);\n    });\n\n    // Shift triangles to be as close to `leftBound` as possible\n    // (if the distance is more than `worldWidth / 2` it can be closer.\n    this.triangles_.forEach(function(triangle) {\n      if (Math.max(triangle.source[0][0], triangle.source[1][0],\n        triangle.source[2][0]) - leftBound > this.sourceWorldWidth_ / 2) {\n        var newTriangle = [[triangle.source[0][0], triangle.source[0][1]],\n          [triangle.source[1][0], triangle.source[1][1]],\n          [triangle.source[2][0], triangle.source[2][1]]];\n        if ((newTriangle[0][0] - leftBound) > this.sourceWorldWidth_ / 2) {\n          newTriangle[0][0] -= this.sourceWorldWidth_;\n        }\n        if ((newTriangle[1][0] - leftBound) > this.sourceWorldWidth_ / 2) {\n          newTriangle[1][0] -= this.sourceWorldWidth_;\n        }\n        if ((newTriangle[2][0] - leftBound) > this.sourceWorldWidth_ / 2) {\n          newTriangle[2][0] -= this.sourceWorldWidth_;\n        }\n\n        // Rarely (if the extent contains both the dateline and prime meridian)\n        // the shift can in turn break some triangles.\n        // Detect this here and don't shift in such cases.\n        var minX = Math.min(\n          newTriangle[0][0], newTriangle[1][0], newTriangle[2][0]);\n        var maxX = Math.max(\n          newTriangle[0][0], newTriangle[1][0], newTriangle[2][0]);\n        if ((maxX - minX) < this.sourceWorldWidth_ / 2) {\n          triangle.source = newTriangle;\n        }\n      }\n    }.bind(this));\n  }\n\n  transformInvCache = {};\n};\n\n/**\n * Adds triangle to the triangulation.\n * @param {import(\"../coordinate.js\").Coordinate} a The target a coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} b The target b coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} c The target c coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} aSrc The source a coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} bSrc The source b coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} cSrc The source c coordinate.\n * @private\n */\nTriangulation.prototype.addTriangle_ = function addTriangle_ (a, b, c, aSrc, bSrc, cSrc) {\n  this.triangles_.push({\n    source: [aSrc, bSrc, cSrc],\n    target: [a, b, c]\n  });\n};\n\n/**\n * Adds quad (points in clock-wise order) to the triangulation\n * (and reprojects the vertices) if valid.\n * Performs quad subdivision if needed to increase precision.\n *\n * @param {import(\"../coordinate.js\").Coordinate} a The target a coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} b The target b coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} c The target c coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} d The target d coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} aSrc The source a coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} bSrc The source b coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} cSrc The source c coordinate.\n * @param {import(\"../coordinate.js\").Coordinate} dSrc The source d coordinate.\n * @param {number} maxSubdivision Maximal allowed subdivision of the quad.\n * @private\n */\nTriangulation.prototype.addQuad_ = function addQuad_ (a, b, c, d, aSrc, bSrc, cSrc, dSrc, maxSubdivision) {\n\n  var sourceQuadExtent = boundingExtent([aSrc, bSrc, cSrc, dSrc]);\n  var sourceCoverageX = this.sourceWorldWidth_ ?\n    getWidth(sourceQuadExtent) / this.sourceWorldWidth_ : null;\n  var sourceWorldWidth = /** @type {number} */ (this.sourceWorldWidth_);\n\n  // when the quad is wrapped in the source projection\n  // it covers most of the projection extent, but not fully\n  var wrapsX = this.sourceProj_.canWrapX() &&\n               sourceCoverageX > 0.5 && sourceCoverageX < 1;\n\n  var needsSubdivision = false;\n\n  if (maxSubdivision > 0) {\n    if (this.targetProj_.isGlobal() && this.targetWorldWidth_) {\n      var targetQuadExtent = boundingExtent([a, b, c, d]);\n      var targetCoverageX = getWidth(targetQuadExtent) / this.targetWorldWidth_;\n      needsSubdivision = targetCoverageX > MAX_TRIANGLE_WIDTH ||\n        needsSubdivision;\n    }\n    if (!wrapsX && this.sourceProj_.isGlobal() && sourceCoverageX) {\n      needsSubdivision = sourceCoverageX > MAX_TRIANGLE_WIDTH ||\n          needsSubdivision;\n    }\n  }\n\n  if (!needsSubdivision && this.maxSourceExtent_) {\n    if (!intersects(sourceQuadExtent, this.maxSourceExtent_)) {\n      // whole quad outside source projection extent -> ignore\n      return;\n    }\n  }\n\n  if (!needsSubdivision) {\n    if (!isFinite(aSrc[0]) || !isFinite(aSrc[1]) ||\n        !isFinite(bSrc[0]) || !isFinite(bSrc[1]) ||\n        !isFinite(cSrc[0]) || !isFinite(cSrc[1]) ||\n        !isFinite(dSrc[0]) || !isFinite(dSrc[1])) {\n      if (maxSubdivision > 0) {\n        needsSubdivision = true;\n      } else {\n        return;\n      }\n    }\n  }\n\n  if (maxSubdivision > 0) {\n    if (!needsSubdivision) {\n      var center = [(a[0] + c[0]) / 2, (a[1] + c[1]) / 2];\n      var centerSrc = this.transformInv_(center);\n\n      var dx;\n      if (wrapsX) {\n        var centerSrcEstimX =\n            (modulo(aSrc[0], sourceWorldWidth) +\n             modulo(cSrc[0], sourceWorldWidth)) / 2;\n        dx = centerSrcEstimX -\n            modulo(centerSrc[0], sourceWorldWidth);\n      } else {\n        dx = (aSrc[0] + cSrc[0]) / 2 - centerSrc[0];\n      }\n      var dy = (aSrc[1] + cSrc[1]) / 2 - centerSrc[1];\n      var centerSrcErrorSquared = dx * dx + dy * dy;\n      needsSubdivision = centerSrcErrorSquared > this.errorThresholdSquared_;\n    }\n    if (needsSubdivision) {\n      if (Math.abs(a[0] - c[0]) <= Math.abs(a[1] - c[1])) {\n        // split horizontally (top & bottom)\n        var bc = [(b[0] + c[0]) / 2, (b[1] + c[1]) / 2];\n        var bcSrc = this.transformInv_(bc);\n        var da = [(d[0] + a[0]) / 2, (d[1] + a[1]) / 2];\n        var daSrc = this.transformInv_(da);\n\n        this.addQuad_(\n          a, b, bc, da, aSrc, bSrc, bcSrc, daSrc, maxSubdivision - 1);\n        this.addQuad_(\n          da, bc, c, d, daSrc, bcSrc, cSrc, dSrc, maxSubdivision - 1);\n      } else {\n        // split vertically (left & right)\n        var ab = [(a[0] + b[0]) / 2, (a[1] + b[1]) / 2];\n        var abSrc = this.transformInv_(ab);\n        var cd = [(c[0] + d[0]) / 2, (c[1] + d[1]) / 2];\n        var cdSrc = this.transformInv_(cd);\n\n        this.addQuad_(\n          a, ab, cd, d, aSrc, abSrc, cdSrc, dSrc, maxSubdivision - 1);\n        this.addQuad_(\n          ab, b, c, cd, abSrc, bSrc, cSrc, cdSrc, maxSubdivision - 1);\n      }\n      return;\n    }\n  }\n\n  if (wrapsX) {\n    if (!this.canWrapXInSource_) {\n      return;\n    }\n    this.wrapsXInSource_ = true;\n  }\n\n  this.addTriangle_(a, c, d, aSrc, cSrc, dSrc);\n  this.addTriangle_(a, b, c, aSrc, bSrc, cSrc);\n};\n\n/**\n * Calculates extent of the 'source' coordinates from all the triangles.\n *\n * @return {import(\"../extent.js\").Extent} Calculated extent.\n */\nTriangulation.prototype.calculateSourceExtent = function calculateSourceExtent () {\n  var extent = createEmpty();\n\n  this.triangles_.forEach(function(triangle, i, arr) {\n    var src = triangle.source;\n    extendCoordinate(extent, src[0]);\n    extendCoordinate(extent, src[1]);\n    extendCoordinate(extent, src[2]);\n  });\n\n  return extent;\n};\n\n/**\n * @return {Array<Triangle>} Array of the calculated triangles.\n */\nTriangulation.prototype.getTriangles = function getTriangles () {\n  return this.triangles_;\n};\n\nexport default Triangulation;\n\n//# sourceMappingURL=Triangulation.js.map","/**\n * @module ol/reproj/Tile\n */\nimport {ERROR_THRESHOLD} from './common.js';\n\nimport Tile from '../Tile.js';\nimport TileState from '../TileState.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {getArea, getCenter, getIntersection} from '../extent.js';\nimport {clamp} from '../math.js';\nimport {calculateSourceResolution, render as renderReprojected} from '../reproj.js';\nimport Triangulation from './Triangulation.js';\n\n\n/**\n * @typedef {function(number, number, number, number) : import(\"../Tile.js\").default} FunctionType\n */\n\n\n/**\n * @classdesc\n * Class encapsulating single reprojected tile.\n * See {@link module:ol/source/TileImage~TileImage}.\n *\n */\nvar ReprojTile = /*@__PURE__*/(function (Tile) {\n  function ReprojTile(\n    sourceProj,\n    sourceTileGrid,\n    targetProj,\n    targetTileGrid,\n    tileCoord,\n    wrappedTileCoord,\n    pixelRatio,\n    gutter,\n    getTileFunction,\n    opt_errorThreshold,\n    opt_renderEdges\n  ) {\n    Tile.call(this, tileCoord, TileState.IDLE);\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.renderEdges_ = opt_renderEdges !== undefined ? opt_renderEdges : false;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.pixelRatio_ = pixelRatio;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.gutter_ = gutter;\n\n    /**\n     * @private\n     * @type {HTMLCanvasElement}\n     */\n    this.canvas_ = null;\n\n    /**\n     * @private\n     * @type {import(\"../tilegrid/TileGrid.js\").default}\n     */\n    this.sourceTileGrid_ = sourceTileGrid;\n\n    /**\n     * @private\n     * @type {import(\"../tilegrid/TileGrid.js\").default}\n     */\n    this.targetTileGrid_ = targetTileGrid;\n\n    /**\n     * @private\n     * @type {import(\"../tilecoord.js\").TileCoord}\n     */\n    this.wrappedTileCoord_ = wrappedTileCoord ? wrappedTileCoord : tileCoord;\n\n    /**\n     * @private\n     * @type {!Array<import(\"../Tile.js\").default>}\n     */\n    this.sourceTiles_ = [];\n\n    /**\n     * @private\n     * @type {Array<import(\"../events.js\").EventsKey>}\n     */\n    this.sourcesListenerKeys_ = null;\n\n    /**\n     * @private\n     * @type {number}\n     */\n    this.sourceZ_ = 0;\n\n    var targetExtent = targetTileGrid.getTileCoordExtent(this.wrappedTileCoord_);\n    var maxTargetExtent = this.targetTileGrid_.getExtent();\n    var maxSourceExtent = this.sourceTileGrid_.getExtent();\n\n    var limitedTargetExtent = maxTargetExtent ?\n      getIntersection(targetExtent, maxTargetExtent) : targetExtent;\n\n    if (getArea(limitedTargetExtent) === 0) {\n      // Tile is completely outside range -> EMPTY\n      // TODO: is it actually correct that the source even creates the tile ?\n      this.state = TileState.EMPTY;\n      return;\n    }\n\n    var sourceProjExtent = sourceProj.getExtent();\n    if (sourceProjExtent) {\n      if (!maxSourceExtent) {\n        maxSourceExtent = sourceProjExtent;\n      } else {\n        maxSourceExtent = getIntersection(maxSourceExtent, sourceProjExtent);\n      }\n    }\n\n    var targetResolution = targetTileGrid.getResolution(\n      this.wrappedTileCoord_[0]);\n\n    var targetCenter = getCenter(limitedTargetExtent);\n    var sourceResolution = calculateSourceResolution(\n      sourceProj, targetProj, targetCenter, targetResolution);\n\n    if (!isFinite(sourceResolution) || sourceResolution <= 0) {\n      // invalid sourceResolution -> EMPTY\n      // probably edges of the projections when no extent is defined\n      this.state = TileState.EMPTY;\n      return;\n    }\n\n    var errorThresholdInPixels = opt_errorThreshold !== undefined ?\n      opt_errorThreshold : ERROR_THRESHOLD;\n\n    /**\n     * @private\n     * @type {!import(\"./Triangulation.js\").default}\n     */\n    this.triangulation_ = new Triangulation(\n      sourceProj, targetProj, limitedTargetExtent, maxSourceExtent,\n      sourceResolution * errorThresholdInPixels);\n\n    if (this.triangulation_.getTriangles().length === 0) {\n      // no valid triangles -> EMPTY\n      this.state = TileState.EMPTY;\n      return;\n    }\n\n    this.sourceZ_ = sourceTileGrid.getZForResolution(sourceResolution);\n    var sourceExtent = this.triangulation_.calculateSourceExtent();\n\n    if (maxSourceExtent) {\n      if (sourceProj.canWrapX()) {\n        sourceExtent[1] = clamp(\n          sourceExtent[1], maxSourceExtent[1], maxSourceExtent[3]);\n        sourceExtent[3] = clamp(\n          sourceExtent[3], maxSourceExtent[1], maxSourceExtent[3]);\n      } else {\n        sourceExtent = getIntersection(sourceExtent, maxSourceExtent);\n      }\n    }\n\n    if (!getArea(sourceExtent)) {\n      this.state = TileState.EMPTY;\n    } else {\n      var sourceRange = sourceTileGrid.getTileRangeForExtentAndZ(\n        sourceExtent, this.sourceZ_);\n\n      for (var srcX = sourceRange.minX; srcX <= sourceRange.maxX; srcX++) {\n        for (var srcY = sourceRange.minY; srcY <= sourceRange.maxY; srcY++) {\n          var tile = getTileFunction(this.sourceZ_, srcX, srcY, pixelRatio);\n          if (tile) {\n            this.sourceTiles_.push(tile);\n          }\n        }\n      }\n\n      if (this.sourceTiles_.length === 0) {\n        this.state = TileState.EMPTY;\n      }\n    }\n  }\n\n  if ( Tile ) ReprojTile.__proto__ = Tile;\n  ReprojTile.prototype = Object.create( Tile && Tile.prototype );\n  ReprojTile.prototype.constructor = ReprojTile;\n\n  /**\n   * @inheritDoc\n   */\n  ReprojTile.prototype.disposeInternal = function disposeInternal () {\n    if (this.state == TileState.LOADING) {\n      this.unlistenSources_();\n    }\n    Tile.prototype.disposeInternal.call(this);\n  };\n\n  /**\n   * Get the HTML Canvas element for this tile.\n   * @return {HTMLCanvasElement} Canvas.\n   */\n  ReprojTile.prototype.getImage = function getImage () {\n    return this.canvas_;\n  };\n\n  /**\n   * @private\n   */\n  ReprojTile.prototype.reproject_ = function reproject_ () {\n    var sources = [];\n    this.sourceTiles_.forEach(function(tile, i, arr) {\n      if (tile && tile.getState() == TileState.LOADED) {\n        sources.push({\n          extent: this.sourceTileGrid_.getTileCoordExtent(tile.tileCoord),\n          image: tile.getImage()\n        });\n      }\n    }.bind(this));\n    this.sourceTiles_.length = 0;\n\n    if (sources.length === 0) {\n      this.state = TileState.ERROR;\n    } else {\n      var z = this.wrappedTileCoord_[0];\n      var size = this.targetTileGrid_.getTileSize(z);\n      var width = typeof size === 'number' ? size : size[0];\n      var height = typeof size === 'number' ? size : size[1];\n      var targetResolution = this.targetTileGrid_.getResolution(z);\n      var sourceResolution = this.sourceTileGrid_.getResolution(this.sourceZ_);\n\n      var targetExtent = this.targetTileGrid_.getTileCoordExtent(\n        this.wrappedTileCoord_);\n      this.canvas_ = renderReprojected(width, height, this.pixelRatio_,\n        sourceResolution, this.sourceTileGrid_.getExtent(),\n        targetResolution, targetExtent, this.triangulation_, sources,\n        this.gutter_, this.renderEdges_);\n\n      this.state = TileState.LOADED;\n    }\n    this.changed();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  ReprojTile.prototype.load = function load () {\n    if (this.state == TileState.IDLE) {\n      this.state = TileState.LOADING;\n      this.changed();\n\n      var leftToLoad = 0;\n\n      this.sourcesListenerKeys_ = [];\n      this.sourceTiles_.forEach(function(tile, i, arr) {\n        var state = tile.getState();\n        if (state == TileState.IDLE || state == TileState.LOADING) {\n          leftToLoad++;\n\n          var sourceListenKey = listen(tile, EventType.CHANGE,\n            function(e) {\n              var state = tile.getState();\n              if (state == TileState.LOADED ||\n                    state == TileState.ERROR ||\n                    state == TileState.EMPTY) {\n                unlistenByKey(sourceListenKey);\n                leftToLoad--;\n                if (leftToLoad === 0) {\n                  this.unlistenSources_();\n                  this.reproject_();\n                }\n              }\n            }, this);\n          this.sourcesListenerKeys_.push(sourceListenKey);\n        }\n      }.bind(this));\n\n      this.sourceTiles_.forEach(function(tile, i, arr) {\n        var state = tile.getState();\n        if (state == TileState.IDLE) {\n          tile.load();\n        }\n      });\n\n      if (leftToLoad === 0) {\n        setTimeout(this.reproject_.bind(this), 0);\n      }\n    }\n  };\n\n  /**\n   * @private\n   */\n  ReprojTile.prototype.unlistenSources_ = function unlistenSources_ () {\n    this.sourcesListenerKeys_.forEach(unlistenByKey);\n    this.sourcesListenerKeys_ = null;\n  };\n\n  return ReprojTile;\n}(Tile));\n\n\nexport default ReprojTile;\n\n//# sourceMappingURL=Tile.js.map","/**\n * @module ol/tileurlfunction\n */\nimport {assert} from './asserts.js';\nimport {modulo} from './math.js';\nimport {hash as tileCoordHash} from './tilecoord.js';\n\n\n/**\n * @param {string} template Template.\n * @param {import(\"./tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n * @return {import(\"./Tile.js\").UrlFunction} Tile URL function.\n */\nexport function createFromTemplate(template, tileGrid) {\n  var zRegEx = /\\{z\\}/g;\n  var xRegEx = /\\{x\\}/g;\n  var yRegEx = /\\{y\\}/g;\n  var dashYRegEx = /\\{-y\\}/g;\n  return (\n    /**\n     * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile Coordinate.\n     * @param {number} pixelRatio Pixel ratio.\n     * @param {import(\"./proj/Projection.js\").default} projection Projection.\n     * @return {string|undefined} Tile URL.\n     */\n    function(tileCoord, pixelRatio, projection) {\n      if (!tileCoord) {\n        return undefined;\n      } else {\n        return template.replace(zRegEx, tileCoord[0].toString())\n          .replace(xRegEx, tileCoord[1].toString())\n          .replace(yRegEx, function() {\n            var y = -tileCoord[2] - 1;\n            return y.toString();\n          })\n          .replace(dashYRegEx, function() {\n            var z = tileCoord[0];\n            var range = tileGrid.getFullTileRange(z);\n            assert(range, 55); // The {-y} placeholder requires a tile grid with extent\n            var y = range.getHeight() + tileCoord[2];\n            return y.toString();\n          });\n      }\n    }\n  );\n}\n\n\n/**\n * @param {Array<string>} templates Templates.\n * @param {import(\"./tilegrid/TileGrid.js\").default} tileGrid Tile grid.\n * @return {import(\"./Tile.js\").UrlFunction} Tile URL function.\n */\nexport function createFromTemplates(templates, tileGrid) {\n  var len = templates.length;\n  var tileUrlFunctions = new Array(len);\n  for (var i = 0; i < len; ++i) {\n    tileUrlFunctions[i] = createFromTemplate(templates[i], tileGrid);\n  }\n  return createFromTileUrlFunctions(tileUrlFunctions);\n}\n\n\n/**\n * @param {Array<import(\"./Tile.js\").UrlFunction>} tileUrlFunctions Tile URL Functions.\n * @return {import(\"./Tile.js\").UrlFunction} Tile URL function.\n */\nexport function createFromTileUrlFunctions(tileUrlFunctions) {\n  if (tileUrlFunctions.length === 1) {\n    return tileUrlFunctions[0];\n  }\n  return (\n    /**\n     * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile Coordinate.\n     * @param {number} pixelRatio Pixel ratio.\n     * @param {import(\"./proj/Projection.js\").default} projection Projection.\n     * @return {string|undefined} Tile URL.\n     */\n    function(tileCoord, pixelRatio, projection) {\n      if (!tileCoord) {\n        return undefined;\n      } else {\n        var h = tileCoordHash(tileCoord);\n        var index = modulo(h, tileUrlFunctions.length);\n        return tileUrlFunctions[index](tileCoord, pixelRatio, projection);\n      }\n    }\n  );\n}\n\n\n/**\n * @param {import(\"./tilecoord.js\").TileCoord} tileCoord Tile coordinate.\n * @param {number} pixelRatio Pixel ratio.\n * @param {import(\"./proj/Projection.js\").default} projection Projection.\n * @return {string|undefined} Tile URL.\n */\nexport function nullTileUrlFunction(tileCoord, pixelRatio, projection) {\n  return undefined;\n}\n\n\n/**\n * @param {string} url URL.\n * @return {Array<string>} Array of urls.\n */\nexport function expandUrl(url) {\n  var urls = [];\n  var match = /\\{([a-z])-([a-z])\\}/.exec(url);\n  if (match) {\n    // char range\n    var startCharCode = match[1].charCodeAt(0);\n    var stopCharCode = match[2].charCodeAt(0);\n    var charCode;\n    for (charCode = startCharCode; charCode <= stopCharCode; ++charCode) {\n      urls.push(url.replace(match[0], String.fromCharCode(charCode)));\n    }\n    return urls;\n  }\n  match = match = /\\{(\\d+)-(\\d+)\\}/.exec(url);\n  if (match) {\n    // number range\n    var stop = parseInt(match[2], 10);\n    for (var i = parseInt(match[1], 10); i <= stop; i++) {\n      urls.push(url.replace(match[0], i.toString()));\n    }\n    return urls;\n  }\n  urls.push(url);\n  return urls;\n}\n\n//# sourceMappingURL=tileurlfunction.js.map","/**\n * @module ol/source/TileEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n\n  /**\n   * Triggered when a tile starts loading.\n   * @event module:ol/source/Tile.TileSourceEvent#tileloadstart\n   * @api\n   */\n  TILELOADSTART: 'tileloadstart',\n\n  /**\n   * Triggered when a tile finishes loading, either when its data is loaded,\n   * or when loading was aborted because the tile is no longer needed.\n   * @event module:ol/source/Tile.TileSourceEvent#tileloadend\n   * @api\n   */\n  TILELOADEND: 'tileloadend',\n\n  /**\n   * Triggered if tile loading results in an error.\n   * @event module:ol/source/Tile.TileSourceEvent#tileloaderror\n   * @api\n   */\n  TILELOADERROR: 'tileloaderror'\n\n};\n\n//# sourceMappingURL=TileEventType.js.map","/**\n * @module ol/source/UrlTile\n */\nimport {getUid} from '../util.js';\nimport TileState from '../TileState.js';\nimport {expandUrl, createFromTemplates, nullTileUrlFunction} from '../tileurlfunction.js';\nimport TileSource, {TileSourceEvent} from './Tile.js';\nimport TileEventType from './TileEventType.js';\nimport {getKeyZXY} from '../tilecoord.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions]\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize]\n * @property {boolean} [opaque]\n * @property {import(\"../proj.js\").ProjectionLike} [projection]\n * @property {import(\"./State.js\").default} [state]\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid]\n * @property {import(\"../Tile.js\").LoadFunction} tileLoadFunction\n * @property {number} [tilePixelRatio]\n * @property {import(\"../Tile.js\").UrlFunction} [tileUrlFunction]\n * @property {string} [url]\n * @property {Array<string>} [urls]\n * @property {boolean} [wrapX=true]\n * @property {number} [transition]\n * @property {string} [key]\n */\n\n\n/**\n * @classdesc\n * Base class for sources providing tiles divided into a tile grid over http.\n *\n * @fires import(\"./Tile.js\").TileSourceEvent\n */\nvar UrlTile = /*@__PURE__*/(function (TileSource) {\n  function UrlTile(options) {\n\n    TileSource.call(this, {\n      attributions: options.attributions,\n      cacheSize: options.cacheSize,\n      opaque: options.opaque,\n      projection: options.projection,\n      state: options.state,\n      tileGrid: options.tileGrid,\n      tilePixelRatio: options.tilePixelRatio,\n      wrapX: options.wrapX,\n      transition: options.transition,\n      key: options.key,\n      attributionsCollapsible: options.attributionsCollapsible\n    });\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.generateTileUrlFunction_ = !options.tileUrlFunction;\n\n    /**\n     * @protected\n     * @type {import(\"../Tile.js\").LoadFunction}\n     */\n    this.tileLoadFunction = options.tileLoadFunction;\n\n    /**\n     * @protected\n     * @type {import(\"../Tile.js\").UrlFunction}\n     */\n    this.tileUrlFunction = options.tileUrlFunction ? options.tileUrlFunction.bind(this) : nullTileUrlFunction;\n\n    /**\n     * @protected\n     * @type {!Array<string>|null}\n     */\n    this.urls = null;\n\n    if (options.urls) {\n      this.setUrls(options.urls);\n    } else if (options.url) {\n      this.setUrl(options.url);\n    }\n\n    if (options.tileUrlFunction) {\n      this.setTileUrlFunction(options.tileUrlFunction, this.key_);\n    }\n\n    /**\n     * @private\n     * @type {!Object<string, boolean>}\n     */\n    this.tileLoadingKeys_ = {};\n\n  }\n\n  if ( TileSource ) UrlTile.__proto__ = TileSource;\n  UrlTile.prototype = Object.create( TileSource && TileSource.prototype );\n  UrlTile.prototype.constructor = UrlTile;\n\n  /**\n   * Return the tile load function of the source.\n   * @return {import(\"../Tile.js\").LoadFunction} TileLoadFunction\n   * @api\n   */\n  UrlTile.prototype.getTileLoadFunction = function getTileLoadFunction () {\n    return this.tileLoadFunction;\n  };\n\n  /**\n   * Return the tile URL function of the source.\n   * @return {import(\"../Tile.js\").UrlFunction} TileUrlFunction\n   * @api\n   */\n  UrlTile.prototype.getTileUrlFunction = function getTileUrlFunction () {\n    return this.tileUrlFunction;\n  };\n\n  /**\n   * Return the URLs used for this source.\n   * When a tileUrlFunction is used instead of url or urls,\n   * null will be returned.\n   * @return {!Array<string>|null} URLs.\n   * @api\n   */\n  UrlTile.prototype.getUrls = function getUrls () {\n    return this.urls;\n  };\n\n  /**\n   * Handle tile change events.\n   * @param {import(\"../events/Event.js\").default} event Event.\n   * @protected\n   */\n  UrlTile.prototype.handleTileChange = function handleTileChange (event) {\n    var tile = /** @type {import(\"../Tile.js\").default} */ (event.target);\n    var uid = getUid(tile);\n    var tileState = tile.getState();\n    var type;\n    if (tileState == TileState.LOADING) {\n      this.tileLoadingKeys_[uid] = true;\n      type = TileEventType.TILELOADSTART;\n    } else if (uid in this.tileLoadingKeys_) {\n      delete this.tileLoadingKeys_[uid];\n      type = tileState == TileState.ERROR ? TileEventType.TILELOADERROR :\n        (tileState == TileState.LOADED || tileState == TileState.ABORT) ?\n          TileEventType.TILELOADEND : undefined;\n    }\n    if (type != undefined) {\n      this.dispatchEvent(new TileSourceEvent(type, tile));\n    }\n  };\n\n  /**\n   * Set the tile load function of the source.\n   * @param {import(\"../Tile.js\").LoadFunction} tileLoadFunction Tile load function.\n   * @api\n   */\n  UrlTile.prototype.setTileLoadFunction = function setTileLoadFunction (tileLoadFunction) {\n    this.tileCache.clear();\n    this.tileLoadFunction = tileLoadFunction;\n    this.changed();\n  };\n\n  /**\n   * Set the tile URL function of the source.\n   * @param {import(\"../Tile.js\").UrlFunction} tileUrlFunction Tile URL function.\n   * @param {string=} key Optional new tile key for the source.\n   * @api\n   */\n  UrlTile.prototype.setTileUrlFunction = function setTileUrlFunction (tileUrlFunction, key) {\n    this.tileUrlFunction = tileUrlFunction;\n    this.tileCache.pruneExceptNewestZ();\n    if (typeof key !== 'undefined') {\n      this.setKey(key);\n    } else {\n      this.changed();\n    }\n  };\n\n  /**\n   * Set the URL to use for requests.\n   * @param {string} url URL.\n   * @api\n   */\n  UrlTile.prototype.setUrl = function setUrl (url) {\n    var urls = this.urls = expandUrl(url);\n    this.setUrls(urls);\n  };\n\n  /**\n   * Set the URLs to use for requests.\n   * @param {Array<string>} urls URLs.\n   * @api\n   */\n  UrlTile.prototype.setUrls = function setUrls (urls) {\n    this.urls = urls;\n    var key = urls.join('\\n');\n    if (this.generateTileUrlFunction_) {\n      this.setTileUrlFunction(createFromTemplates(urls, this.tileGrid), key);\n    } else {\n      this.setKey(key);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  UrlTile.prototype.useTile = function useTile (z, x, y) {\n    var tileCoordKey = getKeyZXY(z, x, y);\n    if (this.tileCache.containsKey(tileCoordKey)) {\n      this.tileCache.get(tileCoordKey);\n    }\n  };\n\n  return UrlTile;\n}(TileSource));\n\n\nexport default UrlTile;\n\n//# sourceMappingURL=UrlTile.js.map","/**\n * @module ol/source/TileImage\n */\nimport {ENABLE_RASTER_REPROJECTION} from '../reproj/common.js';\nimport {getUid} from '../util.js';\nimport ImageTile from '../ImageTile.js';\nimport TileCache from '../TileCache.js';\nimport TileState from '../TileState.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {equivalent, get as getProjection} from '../proj.js';\nimport ReprojTile from '../reproj/Tile.js';\nimport UrlTile from './UrlTile.js';\nimport {getKey, getKeyZXY} from '../tilecoord.js';\nimport {getForProjection as getTileGridForProjection} from '../tilegrid.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize=2048] Cache size.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that\n * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to\n * access pixel data with the Canvas renderer.  See\n * https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [opaque=true] Whether the layer is opaque.\n * @property {import(\"../proj.js\").ProjectionLike} projection Projection.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {import(\"./State.js\").default} [state] Source state.\n * @property {typeof import(\"../ImageTile.js\").default} [tileClass] Class used to instantiate image tiles.\n * Default is {@link module:ol/ImageTile~ImageTile}.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] Tile grid.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n *   imageTile.getImage().src = src;\n * };\n * ```\n * @property {number} [tilePixelRatio=1] The pixel ratio used by the tile service. For example, if the tile\n * service advertizes 256px by 256px tiles but actually sends 512px\n * by 512px images (for retina/hidpi devices) then `tilePixelRatio`\n * should be set to `2`.\n * @property {import(\"../Tile.js\").UrlFunction} [tileUrlFunction] Optional function to get tile URL given a tile coordinate and the projection.\n * @property {string} [url] URL template. Must include `{x}`, `{y}` or `{-y}`, and `{z}` placeholders.\n * A `{?-?}` template pattern, for example `subdomain{a-f}.domain.com`, may be\n * used instead of defining each one separately in the `urls` option.\n * @property {Array<string>} [urls] An array of URL templates.\n * @property {boolean} [wrapX] Whether to wrap the world horizontally. The default, is to\n * request out-of-bounds tiles from the server. When set to `false`, only one\n * world will be rendered. When set to `true`, tiles will be requested for one\n * world only, but they will be wrapped horizontally to render multiple worlds.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {string} [key] Optional tile key for proper cache fetching\n */\n\n\n/**\n * @classdesc\n * Base class for sources providing images divided into a tile grid.\n *\n * @fires import(\"./Tile.js\").TileSourceEvent\n * @api\n */\nvar TileImage = /*@__PURE__*/(function (UrlTile) {\n  function TileImage(options) {\n\n    UrlTile.call(this, {\n      attributions: options.attributions,\n      cacheSize: options.cacheSize,\n      opaque: options.opaque,\n      projection: options.projection,\n      state: options.state,\n      tileGrid: options.tileGrid,\n      tileLoadFunction: options.tileLoadFunction ?\n        options.tileLoadFunction : defaultTileLoadFunction,\n      tilePixelRatio: options.tilePixelRatio,\n      tileUrlFunction: options.tileUrlFunction,\n      url: options.url,\n      urls: options.urls,\n      wrapX: options.wrapX,\n      transition: options.transition,\n      key: options.key,\n      attributionsCollapsible: options.attributionsCollapsible\n    });\n\n    /**\n     * @protected\n     * @type {?string}\n     */\n    this.crossOrigin =\n        options.crossOrigin !== undefined ? options.crossOrigin : null;\n\n    /**\n     * @protected\n     * @type {typeof ImageTile}\n     */\n    this.tileClass = options.tileClass !== undefined ?\n      options.tileClass : ImageTile;\n\n    /**\n     * @protected\n     * @type {!Object<string, TileCache>}\n     */\n    this.tileCacheForProjection = {};\n\n    /**\n     * @protected\n     * @type {!Object<string, import(\"../tilegrid/TileGrid.js\").default>}\n     */\n    this.tileGridForProjection = {};\n\n    /**\n     * @private\n     * @type {number|undefined}\n     */\n    this.reprojectionErrorThreshold_ = options.reprojectionErrorThreshold;\n\n    /**\n     * @private\n     * @type {boolean}\n     */\n    this.renderReprojectionEdges_ = false;\n  }\n\n  if ( UrlTile ) TileImage.__proto__ = UrlTile;\n  TileImage.prototype = Object.create( UrlTile && UrlTile.prototype );\n  TileImage.prototype.constructor = TileImage;\n\n  /**\n   * @inheritDoc\n   */\n  TileImage.prototype.canExpireCache = function canExpireCache () {\n    if (!ENABLE_RASTER_REPROJECTION) {\n      return UrlTile.prototype.canExpireCache.call(this);\n    }\n    if (this.tileCache.canExpireCache()) {\n      return true;\n    } else {\n      for (var key in this.tileCacheForProjection) {\n        if (this.tileCacheForProjection[key].canExpireCache()) {\n          return true;\n        }\n      }\n    }\n    return false;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  TileImage.prototype.expireCache = function expireCache (projection, usedTiles) {\n    if (!ENABLE_RASTER_REPROJECTION) {\n      UrlTile.prototype.expireCache.call(this, projection, usedTiles);\n      return;\n    }\n    var usedTileCache = this.getTileCacheForProjection(projection);\n\n    this.tileCache.expireCache(this.tileCache == usedTileCache ? usedTiles : {});\n    for (var id in this.tileCacheForProjection) {\n      var tileCache = this.tileCacheForProjection[id];\n      tileCache.expireCache(tileCache == usedTileCache ? usedTiles : {});\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  TileImage.prototype.getGutterForProjection = function getGutterForProjection (projection) {\n    if (ENABLE_RASTER_REPROJECTION &&\n        this.getProjection() && projection && !equivalent(this.getProjection(), projection)) {\n      return 0;\n    } else {\n      return this.getGutter();\n    }\n  };\n\n  /**\n   * @return {number} Gutter.\n   */\n  TileImage.prototype.getGutter = function getGutter () {\n    return 0;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  TileImage.prototype.getOpaque = function getOpaque (projection) {\n    if (ENABLE_RASTER_REPROJECTION &&\n        this.getProjection() && projection && !equivalent(this.getProjection(), projection)) {\n      return false;\n    } else {\n      return UrlTile.prototype.getOpaque.call(this, projection);\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  TileImage.prototype.getTileGridForProjection = function getTileGridForProjection$1 (projection) {\n    if (!ENABLE_RASTER_REPROJECTION) {\n      return UrlTile.prototype.getTileGridForProjection.call(this, projection);\n    }\n    var thisProj = this.getProjection();\n    if (this.tileGrid && (!thisProj || equivalent(thisProj, projection))) {\n      return this.tileGrid;\n    } else {\n      var projKey = getUid(projection);\n      if (!(projKey in this.tileGridForProjection)) {\n        this.tileGridForProjection[projKey] = getTileGridForProjection(projection);\n      }\n      return (\n        /** @type {!import(\"../tilegrid/TileGrid.js\").default} */ (this.tileGridForProjection[projKey])\n      );\n    }\n  };\n\n  /**\n   * @inheritDoc\n   */\n  TileImage.prototype.getTileCacheForProjection = function getTileCacheForProjection (projection) {\n    if (!ENABLE_RASTER_REPROJECTION) {\n      return UrlTile.prototype.getTileCacheForProjection.call(this, projection);\n    }\n    var thisProj = this.getProjection(); if (!thisProj || equivalent(thisProj, projection)) {\n      return this.tileCache;\n    } else {\n      var projKey = getUid(projection);\n      if (!(projKey in this.tileCacheForProjection)) {\n        this.tileCacheForProjection[projKey] = new TileCache(this.tileCache.highWaterMark);\n      }\n      return this.tileCacheForProjection[projKey];\n    }\n  };\n\n  /**\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {import(\"../proj/Projection.js\").default} projection Projection.\n   * @param {string} key The key set on the tile.\n   * @return {!import(\"../Tile.js\").default} Tile.\n   * @private\n   */\n  TileImage.prototype.createTile_ = function createTile_ (z, x, y, pixelRatio, projection, key) {\n    var tileCoord = [z, x, y];\n    var urlTileCoord = this.getTileCoordForTileUrlFunction(\n      tileCoord, projection);\n    var tileUrl = urlTileCoord ?\n      this.tileUrlFunction(urlTileCoord, pixelRatio, projection) : undefined;\n    var tile = new this.tileClass(\n      tileCoord,\n      tileUrl !== undefined ? TileState.IDLE : TileState.EMPTY,\n      tileUrl !== undefined ? tileUrl : '',\n      this.crossOrigin,\n      this.tileLoadFunction,\n      this.tileOptions);\n    tile.key = key;\n    listen(tile, EventType.CHANGE,\n      this.handleTileChange, this);\n    return tile;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  TileImage.prototype.getTile = function getTile (z, x, y, pixelRatio, projection) {\n    var sourceProjection = /** @type {!import(\"../proj/Projection.js\").default} */ (this.getProjection());\n    if (!ENABLE_RASTER_REPROJECTION ||\n        !sourceProjection || !projection || equivalent(sourceProjection, projection)) {\n      return this.getTileInternal(z, x, y, pixelRatio, sourceProjection || projection);\n    } else {\n      var cache = this.getTileCacheForProjection(projection);\n      var tileCoord = [z, x, y];\n      var tile;\n      var tileCoordKey = getKey(tileCoord);\n      if (cache.containsKey(tileCoordKey)) {\n        tile = /** @type {!import(\"../Tile.js\").default} */ (cache.get(tileCoordKey));\n      }\n      var key = this.getKey();\n      if (tile && tile.key == key) {\n        return tile;\n      } else {\n        var sourceTileGrid = this.getTileGridForProjection(sourceProjection);\n        var targetTileGrid = this.getTileGridForProjection(projection);\n        var wrappedTileCoord =\n            this.getTileCoordForTileUrlFunction(tileCoord, projection);\n        var newTile = new ReprojTile(\n          sourceProjection, sourceTileGrid,\n          projection, targetTileGrid,\n          tileCoord, wrappedTileCoord, this.getTilePixelRatio(pixelRatio),\n          this.getGutter(),\n          function(z, x, y, pixelRatio) {\n            return this.getTileInternal(z, x, y, pixelRatio, sourceProjection);\n          }.bind(this), this.reprojectionErrorThreshold_,\n          this.renderReprojectionEdges_);\n        newTile.key = key;\n\n        if (tile) {\n          newTile.interimTile = tile;\n          newTile.refreshInterimChain();\n          cache.replace(tileCoordKey, newTile);\n        } else {\n          cache.set(tileCoordKey, newTile);\n        }\n        return newTile;\n      }\n    }\n  };\n\n  /**\n   * @param {number} z Tile coordinate z.\n   * @param {number} x Tile coordinate x.\n   * @param {number} y Tile coordinate y.\n   * @param {number} pixelRatio Pixel ratio.\n   * @param {!import(\"../proj/Projection.js\").default} projection Projection.\n   * @return {!import(\"../Tile.js\").default} Tile.\n   * @protected\n   */\n  TileImage.prototype.getTileInternal = function getTileInternal (z, x, y, pixelRatio, projection) {\n    var tile = null;\n    var tileCoordKey = getKeyZXY(z, x, y);\n    var key = this.getKey();\n    if (!this.tileCache.containsKey(tileCoordKey)) {\n      tile = this.createTile_(z, x, y, pixelRatio, projection, key);\n      this.tileCache.set(tileCoordKey, tile);\n    } else {\n      tile = this.tileCache.get(tileCoordKey);\n      if (tile.key != key) {\n        // The source's params changed. If the tile has an interim tile and if we\n        // can use it then we use it. Otherwise we create a new tile.  In both\n        // cases we attempt to assign an interim tile to the new tile.\n        var interimTile = tile;\n        tile = this.createTile_(z, x, y, pixelRatio, projection, key);\n\n        //make the new tile the head of the list,\n        if (interimTile.getState() == TileState.IDLE) {\n          //the old tile hasn't begun loading yet, and is now outdated, so we can simply discard it\n          tile.interimTile = interimTile.interimTile;\n        } else {\n          tile.interimTile = interimTile;\n        }\n        tile.refreshInterimChain();\n        this.tileCache.replace(tileCoordKey, tile);\n      }\n    }\n    return tile;\n  };\n\n  /**\n   * Sets whether to render reprojection edges or not (usually for debugging).\n   * @param {boolean} render Render the edges.\n   * @api\n   */\n  TileImage.prototype.setRenderReprojectionEdges = function setRenderReprojectionEdges (render) {\n    if (!ENABLE_RASTER_REPROJECTION ||\n        this.renderReprojectionEdges_ == render) {\n      return;\n    }\n    this.renderReprojectionEdges_ = render;\n    for (var id in this.tileCacheForProjection) {\n      this.tileCacheForProjection[id].clear();\n    }\n    this.changed();\n  };\n\n  /**\n   * Sets the tile grid to use when reprojecting the tiles to the given\n   * projection instead of the default tile grid for the projection.\n   *\n   * This can be useful when the default tile grid cannot be created\n   * (e.g. projection has no extent defined) or\n   * for optimization reasons (custom tile size, resolutions, ...).\n   *\n   * @param {import(\"../proj.js\").ProjectionLike} projection Projection.\n   * @param {import(\"../tilegrid/TileGrid.js\").default} tilegrid Tile grid to use for the projection.\n   * @api\n   */\n  TileImage.prototype.setTileGridForProjection = function setTileGridForProjection (projection, tilegrid) {\n    if (ENABLE_RASTER_REPROJECTION) {\n      var proj = getProjection(projection);\n      if (proj) {\n        var projKey = getUid(proj);\n        if (!(projKey in this.tileGridForProjection)) {\n          this.tileGridForProjection[projKey] = tilegrid;\n        }\n      }\n    }\n  };\n\n  return TileImage;\n}(UrlTile));\n\n\n/**\n * @param {ImageTile} imageTile Image tile.\n * @param {string} src Source.\n */\nfunction defaultTileLoadFunction(imageTile, src) {\n  /** @type {HTMLImageElement|HTMLVideoElement} */ (imageTile.getImage()).src = src;\n}\n\nexport default TileImage;\n\n//# sourceMappingURL=TileImage.js.map","/**\n * @module ol/source/XYZ\n */\n\nimport TileImage from './TileImage.js';\nimport {createXYZ, extentFromProjection} from '../tilegrid.js';\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {boolean} [attributionsCollapsible=true] Attributions are collapsible.\n * @property {number} [cacheSize=2048] Cache size.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that\n * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to\n * access pixel data with the Canvas renderer.  See\n * https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {boolean} [opaque=true] Whether the layer is opaque.\n * @property {import(\"../proj.js\").ProjectionLike} [projection='EPSG:3857'] Projection.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {number} [maxZoom=18] Optional max zoom level.\n * @property {number} [minZoom=0] Optional min zoom level.\n * @property {import(\"../tilegrid/TileGrid.js\").default} [tileGrid] Tile grid.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n *   imageTile.getImage().src = src;\n * };\n * ```\n * @property {number} [tilePixelRatio=1] The pixel ratio used by the tile service.\n * For example, if the tile service advertizes 256px by 256px tiles but actually sends 512px\n * by 512px images (for retina/hidpi devices) then `tilePixelRatio`\n * should be set to `2`.\n * @property {number|import(\"../size.js\").Size} [tileSize=[256, 256]] The tile size used by the tile service.\n * @property {import(\"../Tile.js\").UrlFunction} [tileUrlFunction] Optional function to get\n * tile URL given a tile coordinate and the projection.\n * Required if url or urls are not provided.\n * @property {string} [url] URL template. Must include `{x}`, `{y}` or `{-y}`,\n * and `{z}` placeholders. A `{?-?}` template pattern, for example `subdomain{a-f}.domain.com`,\n * may be used instead of defining each one separately in the `urls` option.\n * @property {Array<string>} [urls] An array of URL templates.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n */\n\n\n/**\n * @classdesc\n * Layer source for tile data with URLs in a set XYZ format that are\n * defined in a URL template. By default, this follows the widely-used\n * Google grid where `x` 0 and `y` 0 are in the top left. Grids like\n * TMS where `x` 0 and `y` 0 are in the bottom left can be used by\n * using the `{-y}` placeholder in the URL template, so long as the\n * source does not have a custom tile grid. In this case,\n * {@link module:ol/source/TileImage} can be used with a `tileUrlFunction`\n * such as:\n *\n *  tileUrlFunction: function(coordinate) {\n *    return 'http://mapserver.com/' + coordinate[0] + '/' +\n *        coordinate[1] + '/' + coordinate[2] + '.png';\n *    }\n *\n * @api\n */\nvar XYZ = /*@__PURE__*/(function (TileImage) {\n  function XYZ(opt_options) {\n    var options = opt_options || {};\n    var projection = options.projection !== undefined ?\n      options.projection : 'EPSG:3857';\n\n    var tileGrid = options.tileGrid !== undefined ? options.tileGrid :\n      createXYZ({\n        extent: extentFromProjection(projection),\n        maxZoom: options.maxZoom,\n        minZoom: options.minZoom,\n        tileSize: options.tileSize\n      });\n\n    TileImage.call(this, {\n      attributions: options.attributions,\n      cacheSize: options.cacheSize,\n      crossOrigin: options.crossOrigin,\n      opaque: options.opaque,\n      projection: projection,\n      reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n      tileGrid: tileGrid,\n      tileLoadFunction: options.tileLoadFunction,\n      tilePixelRatio: options.tilePixelRatio,\n      tileUrlFunction: options.tileUrlFunction,\n      url: options.url,\n      urls: options.urls,\n      wrapX: options.wrapX !== undefined ? options.wrapX : true,\n      transition: options.transition,\n      attributionsCollapsible: options.attributionsCollapsible\n    });\n\n  }\n\n  if ( TileImage ) XYZ.__proto__ = TileImage;\n  XYZ.prototype = Object.create( TileImage && TileImage.prototype );\n  XYZ.prototype.constructor = XYZ;\n\n  return XYZ;\n}(TileImage));\n\nexport default XYZ;\n\n//# sourceMappingURL=XYZ.js.map","/**\n * @module ol/source/OSM\n */\n\nimport XYZ from './XYZ.js';\n\n\n/**\n * The attribution containing a link to the OpenStreetMap Copyright and License\n * page.\n * @const\n * @type {string}\n * @api\n */\nexport var ATTRIBUTION = '&#169; ' +\n      '<a href=\"https://www.openstreetmap.org/copyright\">OpenStreetMap</a> ' +\n      'contributors.';\n\n\n/**\n * @typedef {Object} Options\n * @property {import(\"./Source.js\").AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize=2048] Cache size.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that\n * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to\n * access pixel data with the Canvas renderer.  See\n * https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.\n * @property {number} [maxZoom=19] Max zoom.\n * @property {boolean} [opaque=true] Whether the layer is opaque.\n * @property {number} [reprojectionErrorThreshold=1.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {import(\"../Tile.js\").LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n *   imageTile.getImage().src = src;\n * };\n * ```\n * @property {string} [url='https://{a-c}.tile.openstreetmap.org/{z}/{x}/{y}.png'] URL template.\n * Must include `{x}`, `{y}` or `{-y}`, and `{z}` placeholders.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n */\n\n\n/**\n * @classdesc\n * Layer source for the OpenStreetMap tile server.\n * @api\n */\nvar OSM = /*@__PURE__*/(function (XYZ) {\n  function OSM(opt_options) {\n\n    var options = opt_options || {};\n\n    var attributions;\n    if (options.attributions !== undefined) {\n      attributions = options.attributions;\n    } else {\n      attributions = [ATTRIBUTION];\n    }\n\n    var crossOrigin = options.crossOrigin !== undefined ?\n      options.crossOrigin : 'anonymous';\n\n    var url = options.url !== undefined ?\n      options.url : 'https://{a-c}.tile.openstreetmap.org/{z}/{x}/{y}.png';\n\n    XYZ.call(this, {\n      attributions: attributions,\n      cacheSize: options.cacheSize,\n      crossOrigin: crossOrigin,\n      opaque: options.opaque !== undefined ? options.opaque : true,\n      maxZoom: options.maxZoom !== undefined ? options.maxZoom : 19,\n      reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n      tileLoadFunction: options.tileLoadFunction,\n      url: url,\n      wrapX: options.wrapX,\n      attributionsCollapsible: false\n    });\n\n  }\n\n  if ( XYZ ) OSM.__proto__ = XYZ;\n  OSM.prototype = Object.create( XYZ && XYZ.prototype );\n  OSM.prototype.constructor = OSM;\n\n  return OSM;\n}(XYZ));\n\nexport default OSM;\n\n//# sourceMappingURL=OSM.js.map","/**\n * @module ol/format/Feature\n */\nimport {assign} from '../obj.js';\nimport {abstract} from '../util.js';\nimport {get as getProjection, equivalent as equivalentProjection, transformExtent} from '../proj.js';\n\n\n/**\n * @typedef {Object} ReadOptions\n * @property {import(\"../proj.js\").ProjectionLike} [dataProjection] Projection of the data we are reading.\n * If not provided, the projection will be derived from the data (where possible) or\n * the `dataProjection` of the format is assigned (where set). If the projection\n * can not be derived from the data and if no `dataProjection` is set for a format,\n * the features will not be reprojected.\n * @property {import(\"../extent.js\").Extent} [extent] Tile extent of the tile being read. This is only used and\n * required for {@link module:ol/format/MVT}.\n * @property {import(\"../proj.js\").ProjectionLike} [featureProjection] Projection of the feature geometries\n * created by the format reader. If not provided, features will be returned in the\n * `dataProjection`.\n */\n\n\n/**\n * @typedef {Object} WriteOptions\n * @property {import(\"../proj.js\").ProjectionLike} [dataProjection] Projection of the data we are writing.\n * If not provided, the `dataProjection` of the format is assigned (where set).\n * If no `dataProjection` is set for a format, the features will be returned\n * in the `featureProjection`.\n * @property {import(\"../proj.js\").ProjectionLike} [featureProjection] Projection of the feature geometries\n * that will be serialized by the format writer. If not provided, geometries are assumed\n * to be in the `dataProjection` if that is set; in other words, they are not transformed.\n * @property {boolean} [rightHanded] When writing geometries, follow the right-hand\n * rule for linear ring orientation.  This means that polygons will have counter-clockwise\n * exterior rings and clockwise interior rings.  By default, coordinates are serialized\n * as they are provided at construction.  If `true`, the right-hand rule will\n * be applied.  If `false`, the left-hand rule will be applied (clockwise for\n * exterior and counter-clockwise for interior rings).  Note that not all\n * formats support this.  The GeoJSON format does use this property when writing\n * geometries.\n * @property {number} [decimals] Maximum number of decimal places for coordinates.\n * Coordinates are stored internally as floats, but floating-point arithmetic can create\n * coordinates with a large number of decimal places, not generally wanted on output.\n * Set a number here to round coordinates. Can also be used to ensure that\n * coordinates read in can be written back out with the same number of decimals.\n * Default is no rounding.\n */\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for feature formats.\n * {FeatureFormat} subclasses provide the ability to decode and encode\n * {@link module:ol/Feature~Feature} objects from a variety of commonly used geospatial\n * file formats.  See the documentation for each format for more details.\n *\n * @abstract\n * @api\n */\nvar FeatureFormat = function FeatureFormat() {\n\n  /**\n   * @protected\n   * @type {import(\"../proj/Projection.js\").default}\n   */\n  this.dataProjection = null;\n\n  /**\n   * @protected\n   * @type {import(\"../proj/Projection.js\").default}\n   */\n  this.defaultFeatureProjection = null;\n\n};\n\n/**\n * Adds the data projection to the read options.\n * @param {Document|Node|Object|string} source Source.\n * @param {ReadOptions=} opt_options Options.\n * @return {ReadOptions|undefined} Options.\n * @protected\n */\nFeatureFormat.prototype.getReadOptions = function getReadOptions (source, opt_options) {\n  var options;\n  if (opt_options) {\n    options = {\n      dataProjection: opt_options.dataProjection ?\n        opt_options.dataProjection : this.readProjection(source),\n      featureProjection: opt_options.featureProjection\n    };\n  }\n  return this.adaptOptions(options);\n};\n\n/**\n * Sets the `dataProjection` on the options, if no `dataProjection`\n * is set.\n * @param {WriteOptions|ReadOptions|undefined} options\n *   Options.\n * @protected\n * @return {WriteOptions|ReadOptions|undefined}\n *   Updated options.\n */\nFeatureFormat.prototype.adaptOptions = function adaptOptions (options) {\n  return assign({\n    dataProjection: this.dataProjection,\n    featureProjection: this.defaultFeatureProjection\n  }, options);\n};\n\n/**\n * Get the extent from the source of the last {@link readFeatures} call.\n * @return {import(\"../extent.js\").Extent} Tile extent.\n */\nFeatureFormat.prototype.getLastExtent = function getLastExtent () {\n  return null;\n};\n\n/**\n * @abstract\n * @return {import(\"./FormatType.js\").default} Format.\n */\nFeatureFormat.prototype.getType = function getType () {\n  return abstract();\n};\n\n/**\n * Read a single feature from a source.\n *\n * @abstract\n * @param {Document|Node|Object|string} source Source.\n * @param {ReadOptions=} opt_options Read options.\n * @return {import(\"../Feature.js\").FeatureLike} Feature.\n */\nFeatureFormat.prototype.readFeature = function readFeature (source, opt_options) {\n  return abstract();\n};\n\n/**\n * Read all features from a source.\n *\n * @abstract\n * @param {Document|Node|ArrayBuffer|Object|string} source Source.\n * @param {ReadOptions=} opt_options Read options.\n * @return {Array<import(\"../Feature.js\").FeatureLike>} Features.\n */\nFeatureFormat.prototype.readFeatures = function readFeatures (source, opt_options) {\n  return abstract();\n};\n\n/**\n * Read a single geometry from a source.\n *\n * @abstract\n * @param {Document|Node|Object|string} source Source.\n * @param {ReadOptions=} opt_options Read options.\n * @return {import(\"../geom/Geometry.js\").default} Geometry.\n */\nFeatureFormat.prototype.readGeometry = function readGeometry (source, opt_options) {\n  return abstract();\n};\n\n/**\n * Read the projection from a source.\n *\n * @abstract\n * @param {Document|Node|Object|string} source Source.\n * @return {import(\"../proj/Projection.js\").default} Projection.\n */\nFeatureFormat.prototype.readProjection = function readProjection (source) {\n  return abstract();\n};\n\n/**\n * Encode a feature in this format.\n *\n * @abstract\n * @param {import(\"../Feature.js\").default} feature Feature.\n * @param {WriteOptions=} opt_options Write options.\n * @return {string} Result.\n */\nFeatureFormat.prototype.writeFeature = function writeFeature (feature, opt_options) {\n  return abstract();\n};\n\n/**\n * Encode an array of features in this format.\n *\n * @abstract\n * @param {Array<import(\"../Feature.js\").default>} features Features.\n * @param {WriteOptions=} opt_options Write options.\n * @return {string} Result.\n */\nFeatureFormat.prototype.writeFeatures = function writeFeatures (features, opt_options) {\n  return abstract();\n};\n\n/**\n * Write a single geometry in this format.\n *\n * @abstract\n * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n * @param {WriteOptions=} opt_options Write options.\n * @return {string} Result.\n */\nFeatureFormat.prototype.writeGeometry = function writeGeometry (geometry, opt_options) {\n  return abstract();\n};\n\nexport default FeatureFormat;\n\n/**\n * @param {import(\"../geom/Geometry.js\").default|import(\"../extent.js\").Extent} geometry Geometry.\n * @param {boolean} write Set to true for writing, false for reading.\n * @param {(WriteOptions|ReadOptions)=} opt_options Options.\n * @return {import(\"../geom/Geometry.js\").default|import(\"../extent.js\").Extent} Transformed geometry.\n */\nexport function transformWithOptions(geometry, write, opt_options) {\n  var featureProjection = opt_options ?\n    getProjection(opt_options.featureProjection) : null;\n  var dataProjection = opt_options ?\n    getProjection(opt_options.dataProjection) : null;\n  /**\n   * @type {import(\"../geom/Geometry.js\").default|import(\"../extent.js\").Extent}\n   */\n  var transformed;\n  if (featureProjection && dataProjection &&\n      !equivalentProjection(featureProjection, dataProjection)) {\n    if (Array.isArray(geometry)) {\n      // FIXME this is necessary because GML treats extents\n      // as geometries\n      transformed = transformExtent(\n        geometry,\n        dataProjection,\n        featureProjection);\n    } else {\n      transformed = (write ? /** @type {import(\"../geom/Geometry\").default} */ (geometry).clone() : geometry).transform(\n        write ? featureProjection : dataProjection,\n        write ? dataProjection : featureProjection);\n    }\n  } else {\n    transformed = geometry;\n  }\n  if (write && opt_options && /** @type {WriteOptions} */ (opt_options).decimals !== undefined &&\n    !Array.isArray(transformed)) {\n    var power = Math.pow(10, /** @type {WriteOptions} */ (opt_options).decimals);\n    // if decimals option on write, round each coordinate appropriately\n    /**\n     * @param {Array<number>} coordinates Coordinates.\n     * @return {Array<number>} Transformed coordinates.\n     */\n    var transform = function(coordinates) {\n      for (var i = 0, ii = coordinates.length; i < ii; ++i) {\n        coordinates[i] = Math.round(coordinates[i] * power) / power;\n      }\n      return coordinates;\n    };\n    if (transformed === geometry) {\n      transformed = /** @type {import(\"../geom/Geometry\").default} */ (geometry).clone();\n    }\n    transformed.applyTransform(transform);\n  }\n  return transformed;\n}\n\n//# sourceMappingURL=Feature.js.map","/**\n * @module ol/xml\n */\nimport {extend} from './array.js';\n\n\n/**\n * When using {@link module:ol/xml~makeChildAppender} or\n * {@link module:ol/xml~makeSimpleNodeFactory}, the top `objectStack` item needs\n * to have this structure.\n * @typedef {Object} NodeStackItem\n * @property {Node} node\n */\n\n\n/**\n * @typedef {function(Element, Array<*>)} Parser\n */\n\n\n/**\n * @typedef {function(Element, *, Array<*>)} Serializer\n */\n\n\n/**\n * This document should be used when creating nodes for XML serializations. This\n * document is also used by {@link module:ol/xml~createElementNS}\n * @const\n * @type {Document}\n */\nexport var DOCUMENT = document.implementation.createDocument('', '', null);\n\n\n/**\n * @type {string}\n */\nexport var XML_SCHEMA_INSTANCE_URI = 'http://www.w3.org/2001/XMLSchema-instance';\n\n\n/**\n * @param {string} namespaceURI Namespace URI.\n * @param {string} qualifiedName Qualified name.\n * @return {Element} Node.\n */\nexport function createElementNS(namespaceURI, qualifiedName) {\n  return DOCUMENT.createElementNS(namespaceURI, qualifiedName);\n}\n\n\n/**\n * Recursively grab all text content of child nodes into a single string.\n * @param {Node} node Node.\n * @param {boolean} normalizeWhitespace Normalize whitespace: remove all line\n * breaks.\n * @return {string} All text content.\n * @api\n */\nexport function getAllTextContent(node, normalizeWhitespace) {\n  return getAllTextContent_(node, normalizeWhitespace, []).join('');\n}\n\n\n/**\n * Recursively grab all text content of child nodes into a single string.\n * @param {Node} node Node.\n * @param {boolean} normalizeWhitespace Normalize whitespace: remove all line\n * breaks.\n * @param {Array<string>} accumulator Accumulator.\n * @private\n * @return {Array<string>} Accumulator.\n */\nexport function getAllTextContent_(node, normalizeWhitespace, accumulator) {\n  if (node.nodeType == Node.CDATA_SECTION_NODE ||\n      node.nodeType == Node.TEXT_NODE) {\n    if (normalizeWhitespace) {\n      accumulator.push(String(node.nodeValue).replace(/(\\r\\n|\\r|\\n)/g, ''));\n    } else {\n      accumulator.push(node.nodeValue);\n    }\n  } else {\n    var n;\n    for (n = node.firstChild; n; n = n.nextSibling) {\n      getAllTextContent_(n, normalizeWhitespace, accumulator);\n    }\n  }\n  return accumulator;\n}\n\n\n/**\n * @param {Object} object Object.\n * @return {boolean} Is a document.\n */\nexport function isDocument(object) {\n  return 'documentElement' in object;\n}\n\n\n/**\n * @param {Element} node Node.\n * @param {?string} namespaceURI Namespace URI.\n * @param {string} name Attribute name.\n * @return {string} Value\n */\nexport function getAttributeNS(node, namespaceURI, name) {\n  return node.getAttributeNS(namespaceURI, name) || '';\n}\n\n\n/**\n * Parse an XML string to an XML Document.\n * @param {string} xml XML.\n * @return {Document} Document.\n * @api\n */\nexport function parse(xml) {\n  return new DOMParser().parseFromString(xml, 'application/xml');\n}\n\n\n/**\n * Make an array extender function for extending the array at the top of the\n * object stack.\n * @param {function(this: T, Node, Array<*>): (Array<*>|undefined)} valueReader Value reader.\n * @param {T=} opt_this The object to use as `this` in `valueReader`.\n * @return {Parser} Parser.\n * @template T\n */\nexport function makeArrayExtender(valueReader, opt_this) {\n  return (\n    /**\n     * @param {Node} node Node.\n     * @param {Array<*>} objectStack Object stack.\n     */\n    function(node, objectStack) {\n      var value = valueReader.call(opt_this !== undefined ? opt_this : this, node, objectStack);\n      if (value !== undefined) {\n        var array = /** @type {Array<*>} */ (objectStack[objectStack.length - 1]);\n        extend(array, value);\n      }\n    }\n  );\n}\n\n\n/**\n * Make an array pusher function for pushing to the array at the top of the\n * object stack.\n * @param {function(this: T, Element, Array<*>): *} valueReader Value reader.\n * @param {T=} opt_this The object to use as `this` in `valueReader`.\n * @return {Parser} Parser.\n * @template T\n */\nexport function makeArrayPusher(valueReader, opt_this) {\n  return (\n    /**\n     * @param {Element} node Node.\n     * @param {Array<*>} objectStack Object stack.\n     */\n    function(node, objectStack) {\n      var value = valueReader.call(opt_this !== undefined ? opt_this : this, node, objectStack);\n      if (value !== undefined) {\n        var array = /** @type {Array<*>} */ (objectStack[objectStack.length - 1]);\n        array.push(value);\n      }\n    });\n}\n\n\n/**\n * Make an object stack replacer function for replacing the object at the\n * top of the stack.\n * @param {function(this: T, Node, Array<*>): *} valueReader Value reader.\n * @param {T=} opt_this The object to use as `this` in `valueReader`.\n * @return {Parser} Parser.\n * @template T\n */\nexport function makeReplacer(valueReader, opt_this) {\n  return (\n    /**\n     * @param {Node} node Node.\n     * @param {Array<*>} objectStack Object stack.\n     */\n    function(node, objectStack) {\n      var value = valueReader.call(opt_this !== undefined ? opt_this : this, node, objectStack);\n      if (value !== undefined) {\n        objectStack[objectStack.length - 1] = value;\n      }\n    });\n}\n\n\n/**\n * Make an object property pusher function for adding a property to the\n * object at the top of the stack.\n * @param {function(this: T, Element, Array<*>): *} valueReader Value reader.\n * @param {string=} opt_property Property.\n * @param {T=} opt_this The object to use as `this` in `valueReader`.\n * @return {Parser} Parser.\n * @template T\n */\nexport function makeObjectPropertyPusher(valueReader, opt_property, opt_this) {\n  return (\n    /**\n     * @param {Element} node Node.\n     * @param {Array<*>} objectStack Object stack.\n     */\n    function(node, objectStack) {\n      var value = valueReader.call(opt_this !== undefined ? opt_this : this, node, objectStack);\n      if (value !== undefined) {\n        var object = /** @type {!Object} */ (objectStack[objectStack.length - 1]);\n        var property = opt_property !== undefined ? opt_property : node.localName;\n        var array;\n        if (property in object) {\n          array = object[property];\n        } else {\n          array = object[property] = [];\n        }\n        array.push(value);\n      }\n    });\n}\n\n\n/**\n * Make an object property setter function.\n * @param {function(this: T, Element, Array<*>): *} valueReader Value reader.\n * @param {string=} opt_property Property.\n * @param {T=} opt_this The object to use as `this` in `valueReader`.\n * @return {Parser} Parser.\n * @template T\n */\nexport function makeObjectPropertySetter(valueReader, opt_property, opt_this) {\n  return (\n    /**\n     * @param {Element} node Node.\n     * @param {Array<*>} objectStack Object stack.\n     */\n    function(node, objectStack) {\n      var value = valueReader.call(opt_this !== undefined ? opt_this : this, node, objectStack);\n      if (value !== undefined) {\n        var object = /** @type {!Object} */ (objectStack[objectStack.length - 1]);\n        var property = opt_property !== undefined ? opt_property : node.localName;\n        object[property] = value;\n      }\n    });\n}\n\n\n/**\n * Create a serializer that appends nodes written by its `nodeWriter` to its\n * designated parent. The parent is the `node` of the\n * {@link module:ol/xml~NodeStackItem} at the top of the `objectStack`.\n * @param {function(this: T, Node, V, Array<*>)} nodeWriter Node writer.\n * @param {T=} opt_this The object to use as `this` in `nodeWriter`.\n * @return {Serializer} Serializer.\n * @template T, V\n */\nexport function makeChildAppender(nodeWriter, opt_this) {\n  return function(node, value, objectStack) {\n    nodeWriter.call(opt_this !== undefined ? opt_this : this, node, value, objectStack);\n    var parent = /** @type {NodeStackItem} */ (objectStack[objectStack.length - 1]);\n    var parentNode = parent.node;\n    parentNode.appendChild(node);\n  };\n}\n\n\n/**\n * Create a serializer that calls the provided `nodeWriter` from\n * {@link module:ol/xml~serialize}. This can be used by the parent writer to have the\n * 'nodeWriter' called with an array of values when the `nodeWriter` was\n * designed to serialize a single item. An example would be a LineString\n * geometry writer, which could be reused for writing MultiLineString\n * geometries.\n * @param {function(this: T, Element, V, Array<*>)} nodeWriter Node writer.\n * @param {T=} opt_this The object to use as `this` in `nodeWriter`.\n * @return {Serializer} Serializer.\n * @template T, V\n */\nexport function makeArraySerializer(nodeWriter, opt_this) {\n  var serializersNS, nodeFactory;\n  return function(node, value, objectStack) {\n    if (serializersNS === undefined) {\n      serializersNS = {};\n      var serializers = {};\n      serializers[node.localName] = nodeWriter;\n      serializersNS[node.namespaceURI] = serializers;\n      nodeFactory = makeSimpleNodeFactory(node.localName);\n    }\n    serialize(serializersNS, nodeFactory, value, objectStack);\n  };\n}\n\n\n/**\n * Create a node factory which can use the `opt_keys` passed to\n * {@link module:ol/xml~serialize} or {@link module:ol/xml~pushSerializeAndPop} as node names,\n * or a fixed node name. The namespace of the created nodes can either be fixed,\n * or the parent namespace will be used.\n * @param {string=} opt_nodeName Fixed node name which will be used for all\n *     created nodes. If not provided, the 3rd argument to the resulting node\n *     factory needs to be provided and will be the nodeName.\n * @param {string=} opt_namespaceURI Fixed namespace URI which will be used for\n *     all created nodes. If not provided, the namespace of the parent node will\n *     be used.\n * @return {function(*, Array<*>, string=): (Node|undefined)} Node factory.\n */\nexport function makeSimpleNodeFactory(opt_nodeName, opt_namespaceURI) {\n  var fixedNodeName = opt_nodeName;\n  return (\n    /**\n     * @param {*} value Value.\n     * @param {Array<*>} objectStack Object stack.\n     * @param {string=} opt_nodeName Node name.\n     * @return {Node} Node.\n     */\n    function(value, objectStack, opt_nodeName) {\n      var context = /** @type {NodeStackItem} */ (objectStack[objectStack.length - 1]);\n      var node = context.node;\n      var nodeName = fixedNodeName;\n      if (nodeName === undefined) {\n        nodeName = opt_nodeName;\n      }\n\n      var namespaceURI = opt_namespaceURI !== undefined ? opt_namespaceURI : node.namespaceURI;\n      return createElementNS(namespaceURI, /** @type {string} */ (nodeName));\n    }\n  );\n}\n\n\n/**\n * A node factory that creates a node using the parent's `namespaceURI` and the\n * `nodeName` passed by {@link module:ol/xml~serialize} or\n * {@link module:ol/xml~pushSerializeAndPop} to the node factory.\n * @const\n * @type {function(*, Array<*>, string=): (Node|undefined)}\n */\nexport var OBJECT_PROPERTY_NODE_FACTORY = makeSimpleNodeFactory();\n\n\n/**\n * Create an array of `values` to be used with {@link module:ol/xml~serialize} or\n * {@link module:ol/xml~pushSerializeAndPop}, where `orderedKeys` has to be provided as\n * `opt_key` argument.\n * @param {Object<string, V>} object Key-value pairs for the sequence. Keys can\n *     be a subset of the `orderedKeys`.\n * @param {Array<string>} orderedKeys Keys in the order of the sequence.\n * @return {Array<V>} Values in the order of the sequence. The resulting array\n *     has the same length as the `orderedKeys` array. Values that are not\n *     present in `object` will be `undefined` in the resulting array.\n * @template V\n */\nexport function makeSequence(object, orderedKeys) {\n  var length = orderedKeys.length;\n  var sequence = new Array(length);\n  for (var i = 0; i < length; ++i) {\n    sequence[i] = object[orderedKeys[i]];\n  }\n  return sequence;\n}\n\n\n/**\n * Create a namespaced structure, using the same values for each namespace.\n * This can be used as a starting point for versioned parsers, when only a few\n * values are version specific.\n * @param {Array<string>} namespaceURIs Namespace URIs.\n * @param {T} structure Structure.\n * @param {Object<string, T>=} opt_structureNS Namespaced structure to add to.\n * @return {Object<string, T>} Namespaced structure.\n * @template T\n */\nexport function makeStructureNS(namespaceURIs, structure, opt_structureNS) {\n  /**\n   * @type {Object<string, T>}\n   */\n  var structureNS = opt_structureNS !== undefined ? opt_structureNS : {};\n  var i, ii;\n  for (i = 0, ii = namespaceURIs.length; i < ii; ++i) {\n    structureNS[namespaceURIs[i]] = structure;\n  }\n  return structureNS;\n}\n\n\n/**\n * Parse a node using the parsers and object stack.\n * @param {Object<string, Object<string, Parser>>} parsersNS\n *     Parsers by namespace.\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @param {*=} opt_this The object to use as `this`.\n */\nexport function parseNode(parsersNS, node, objectStack, opt_this) {\n  var n;\n  for (n = node.firstElementChild; n; n = n.nextElementSibling) {\n    var parsers = parsersNS[n.namespaceURI];\n    if (parsers !== undefined) {\n      var parser = parsers[n.localName];\n      if (parser !== undefined) {\n        parser.call(opt_this, n, objectStack);\n      }\n    }\n  }\n}\n\n\n/**\n * Push an object on top of the stack, parse and return the popped object.\n * @param {T} object Object.\n * @param {Object<string, Object<string, Parser>>} parsersNS\n *     Parsers by namespace.\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n * @param {*=} opt_this The object to use as `this`.\n * @return {T} Object.\n * @template T\n */\nexport function pushParseAndPop(object, parsersNS, node, objectStack, opt_this) {\n  objectStack.push(object);\n  parseNode(parsersNS, node, objectStack, opt_this);\n  return /** @type {T} */ (objectStack.pop());\n}\n\n\n/**\n * Walk through an array of `values` and call a serializer for each value.\n * @param {Object<string, Object<string, Serializer>>} serializersNS\n *     Namespaced serializers.\n * @param {function(this: T, *, Array<*>, (string|undefined)): (Node|undefined)} nodeFactory\n *     Node factory. The `nodeFactory` creates the node whose namespace and name\n *     will be used to choose a node writer from `serializersNS`. This\n *     separation allows us to decide what kind of node to create, depending on\n *     the value we want to serialize. An example for this would be different\n *     geometry writers based on the geometry type.\n * @param {Array<*>} values Values to serialize. An example would be an array\n *     of {@link module:ol/Feature~Feature} instances.\n * @param {Array<*>} objectStack Node stack.\n * @param {Array<string>=} opt_keys Keys of the `values`. Will be passed to the\n *     `nodeFactory`. This is used for serializing object literals where the\n *     node name relates to the property key. The array length of `opt_keys` has\n *     to match the length of `values`. For serializing a sequence, `opt_keys`\n *     determines the order of the sequence.\n * @param {T=} opt_this The object to use as `this` for the node factory and\n *     serializers.\n * @template T\n */\nexport function serialize(\n  serializersNS, nodeFactory, values, objectStack, opt_keys, opt_this) {\n  var length = (opt_keys !== undefined ? opt_keys : values).length;\n  var value, node;\n  for (var i = 0; i < length; ++i) {\n    value = values[i];\n    if (value !== undefined) {\n      node = nodeFactory.call(opt_this !== undefined ? opt_this : this, value, objectStack,\n        opt_keys !== undefined ? opt_keys[i] : undefined);\n      if (node !== undefined) {\n        serializersNS[node.namespaceURI][node.localName]\n          .call(opt_this, node, value, objectStack);\n      }\n    }\n  }\n}\n\n\n/**\n * @param {O} object Object.\n * @param {Object<string, Object<string, Serializer>>} serializersNS\n *     Namespaced serializers.\n * @param {function(this: T, *, Array<*>, (string|undefined)): (Node|undefined)} nodeFactory\n *     Node factory. The `nodeFactory` creates the node whose namespace and name\n *     will be used to choose a node writer from `serializersNS`. This\n *     separation allows us to decide what kind of node to create, depending on\n *     the value we want to serialize. An example for this would be different\n *     geometry writers based on the geometry type.\n * @param {Array<*>} values Values to serialize. An example would be an array\n *     of {@link module:ol/Feature~Feature} instances.\n * @param {Array<*>} objectStack Node stack.\n * @param {Array<string>=} opt_keys Keys of the `values`. Will be passed to the\n *     `nodeFactory`. This is used for serializing object literals where the\n *     node name relates to the property key. The array length of `opt_keys` has\n *     to match the length of `values`. For serializing a sequence, `opt_keys`\n *     determines the order of the sequence.\n * @param {T=} opt_this The object to use as `this` for the node factory and\n *     serializers.\n * @return {O|undefined} Object.\n * @template O, T\n */\nexport function pushSerializeAndPop(object, serializersNS, nodeFactory, values, objectStack, opt_keys, opt_this) {\n  objectStack.push(object);\n  serialize(serializersNS, nodeFactory, values, objectStack, opt_keys, opt_this);\n  return /** @type {O|undefined} */ (objectStack.pop());\n}\n\n//# sourceMappingURL=xml.js.map","/**\n * @module ol/format/XMLFeature\n */\nimport {abstract} from '../util.js';\nimport {extend} from '../array.js';\nimport FeatureFormat from '../format/Feature.js';\nimport FormatType from '../format/FormatType.js';\nimport {isDocument, parse} from '../xml.js';\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for XML feature formats.\n *\n * @abstract\n */\nvar XMLFeature = /*@__PURE__*/(function (FeatureFormat) {\n  function XMLFeature() {\n    FeatureFormat.call(this);\n\n    /**\n     * @type {XMLSerializer}\n     * @private\n     */\n    this.xmlSerializer_ = new XMLSerializer();\n  }\n\n  if ( FeatureFormat ) XMLFeature.__proto__ = FeatureFormat;\n  XMLFeature.prototype = Object.create( FeatureFormat && FeatureFormat.prototype );\n  XMLFeature.prototype.constructor = XMLFeature;\n\n  /**\n   * @inheritDoc\n   */\n  XMLFeature.prototype.getType = function getType () {\n    return FormatType.XML;\n  };\n\n  /**\n   * Read a single feature.\n   *\n   * @param {Document|Node|Object|string} source Source.\n   * @param {import(\"./Feature.js\").ReadOptions=} opt_options Read options.\n   * @return {import(\"../Feature.js\").default} Feature.\n   * @api\n   */\n  XMLFeature.prototype.readFeature = function readFeature (source, opt_options) {\n    if (!source) {\n      return null;\n    } else if (typeof source === 'string') {\n      var doc = parse(source);\n      return this.readFeatureFromDocument(doc, opt_options);\n    } else if (isDocument(source)) {\n      return this.readFeatureFromDocument(/** @type {Document} */ (source), opt_options);\n    } else {\n      return this.readFeatureFromNode(/** @type {Node} */ (source), opt_options);\n    }\n  };\n\n  /**\n   * @param {Document} doc Document.\n   * @param {import(\"./Feature.js\").ReadOptions=} opt_options Options.\n   * @return {import(\"../Feature.js\").default} Feature.\n   */\n  XMLFeature.prototype.readFeatureFromDocument = function readFeatureFromDocument (doc, opt_options) {\n    var features = this.readFeaturesFromDocument(doc, opt_options);\n    if (features.length > 0) {\n      return features[0];\n    } else {\n      return null;\n    }\n  };\n\n  /**\n   * @param {Node} node Node.\n   * @param {import(\"./Feature.js\").ReadOptions=} opt_options Options.\n   * @return {import(\"../Feature.js\").default} Feature.\n   */\n  XMLFeature.prototype.readFeatureFromNode = function readFeatureFromNode (node, opt_options) {\n    return null; // not implemented\n  };\n\n  /**\n   * Read all features from a feature collection.\n   *\n   * @param {Document|Node|Object|string} source Source.\n   * @param {import(\"./Feature.js\").ReadOptions=} opt_options Options.\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   * @api\n   */\n  XMLFeature.prototype.readFeatures = function readFeatures (source, opt_options) {\n    if (!source) {\n      return [];\n    } else if (typeof source === 'string') {\n      var doc = parse(source);\n      return this.readFeaturesFromDocument(doc, opt_options);\n    } else if (isDocument(source)) {\n      return this.readFeaturesFromDocument(\n        /** @type {Document} */ (source), opt_options);\n    } else {\n      return this.readFeaturesFromNode(/** @type {Node} */ (source), opt_options);\n    }\n  };\n\n  /**\n   * @param {Document} doc Document.\n   * @param {import(\"./Feature.js\").ReadOptions=} opt_options Options.\n   * @protected\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   */\n  XMLFeature.prototype.readFeaturesFromDocument = function readFeaturesFromDocument (doc, opt_options) {\n    /** @type {Array<import(\"../Feature.js\").default>} */\n    var features = [];\n    for (var n = /** @type {Node} */ (doc.firstChild); n; n = n.nextSibling) {\n      if (n.nodeType == Node.ELEMENT_NODE) {\n        extend(features, this.readFeaturesFromNode(n, opt_options));\n      }\n    }\n    return features;\n  };\n\n  /**\n   * @abstract\n   * @param {Node} node Node.\n   * @param {import(\"./Feature.js\").ReadOptions=} opt_options Options.\n   * @protected\n   * @return {Array<import(\"../Feature.js\").default>} Features.\n   */\n  XMLFeature.prototype.readFeaturesFromNode = function readFeaturesFromNode (node, opt_options) {\n    return abstract();\n  };\n\n  /**\n   * @inheritDoc\n   */\n  XMLFeature.prototype.readGeometry = function readGeometry (source, opt_options) {\n    if (!source) {\n      return null;\n    } else if (typeof source === 'string') {\n      var doc = parse(source);\n      return this.readGeometryFromDocument(doc, opt_options);\n    } else if (isDocument(source)) {\n      return this.readGeometryFromDocument(\n        /** @type {Document} */ (source), opt_options);\n    } else {\n      return this.readGeometryFromNode(/** @type {Node} */ (source), opt_options);\n    }\n  };\n\n  /**\n   * @param {Document} doc Document.\n   * @param {import(\"./Feature.js\").ReadOptions=} opt_options Options.\n   * @protected\n   * @return {import(\"../geom/Geometry.js\").default} Geometry.\n   */\n  XMLFeature.prototype.readGeometryFromDocument = function readGeometryFromDocument (doc, opt_options) {\n    return null; // not implemented\n  };\n\n  /**\n   * @param {Node} node Node.\n   * @param {import(\"./Feature.js\").ReadOptions=} opt_options Options.\n   * @protected\n   * @return {import(\"../geom/Geometry.js\").default} Geometry.\n   */\n  XMLFeature.prototype.readGeometryFromNode = function readGeometryFromNode (node, opt_options) {\n    return null; // not implemented\n  };\n\n  /**\n   * Read the projection from the source.\n   *\n   * @param {Document|Node|Object|string} source Source.\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   * @api\n   */\n  XMLFeature.prototype.readProjection = function readProjection (source) {\n    if (!source) {\n      return null;\n    } else if (typeof source === 'string') {\n      var doc = parse(source);\n      return this.readProjectionFromDocument(doc);\n    } else if (isDocument(source)) {\n      return this.readProjectionFromDocument(/** @type {Document} */ (source));\n    } else {\n      return this.readProjectionFromNode(/** @type {Node} */ (source));\n    }\n  };\n\n  /**\n   * @param {Document} doc Document.\n   * @protected\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   */\n  XMLFeature.prototype.readProjectionFromDocument = function readProjectionFromDocument (doc) {\n    return this.dataProjection;\n  };\n\n  /**\n   * @param {Node} node Node.\n   * @protected\n   * @return {import(\"../proj/Projection.js\").default} Projection.\n   */\n  XMLFeature.prototype.readProjectionFromNode = function readProjectionFromNode (node) {\n    return this.dataProjection;\n  };\n\n  /**\n   * @inheritDoc\n   */\n  XMLFeature.prototype.writeFeature = function writeFeature (feature, opt_options) {\n    var node = this.writeFeatureNode(feature, opt_options);\n    return this.xmlSerializer_.serializeToString(node);\n  };\n\n  /**\n   * @param {import(\"../Feature.js\").default} feature Feature.\n   * @param {import(\"./Feature.js\").WriteOptions=} opt_options Options.\n   * @protected\n   * @return {Node} Node.\n   */\n  XMLFeature.prototype.writeFeatureNode = function writeFeatureNode (feature, opt_options) {\n    return null; // not implemented\n  };\n\n  /**\n   * Encode an array of features as string.\n   *\n   * @param {Array<import(\"../Feature.js\").default>} features Features.\n   * @param {import(\"./Feature.js\").WriteOptions=} opt_options Write options.\n   * @return {string} Result.\n   * @api\n   */\n  XMLFeature.prototype.writeFeatures = function writeFeatures (features, opt_options) {\n    var node = this.writeFeaturesNode(features, opt_options);\n    return this.xmlSerializer_.serializeToString(node);\n  };\n\n  /**\n   * @param {Array<import(\"../Feature.js\").default>} features Features.\n   * @param {import(\"./Feature.js\").WriteOptions=} opt_options Options.\n   * @return {Node} Node.\n   */\n  XMLFeature.prototype.writeFeaturesNode = function writeFeaturesNode (features, opt_options) {\n    return null; // not implemented\n  };\n\n  /**\n   * @inheritDoc\n   */\n  XMLFeature.prototype.writeGeometry = function writeGeometry (geometry, opt_options) {\n    var node = this.writeGeometryNode(geometry, opt_options);\n    return this.xmlSerializer_.serializeToString(node);\n  };\n\n  /**\n   * @param {import(\"../geom/Geometry.js\").default} geometry Geometry.\n   * @param {import(\"./Feature.js\").WriteOptions=} opt_options Options.\n   * @return {Node} Node.\n   */\n  XMLFeature.prototype.writeGeometryNode = function writeGeometryNode (geometry, opt_options) {\n    return null; // not implemented\n  };\n\n  return XMLFeature;\n}(FeatureFormat));\n\n\nexport default XMLFeature;\n\n//# sourceMappingURL=XMLFeature.js.map","/**\n * @module ol/format/OSMXML\n */\n// FIXME add typedef for stack state objects\nimport {extend} from '../array.js';\nimport Feature from '../Feature.js';\nimport {transformWithOptions} from './Feature.js';\nimport XMLFeature from './XMLFeature.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport LineString from '../geom/LineString.js';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport {isEmpty} from '../obj.js';\nimport {get as getProjection} from '../proj.js';\nimport {pushParseAndPop, makeStructureNS} from '../xml.js';\n\n\n/**\n * @const\n * @type {Array<null>}\n */\nvar NAMESPACE_URIS = [null];\n\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nvar WAY_PARSERS = makeStructureNS(\n  NAMESPACE_URIS, {\n    'nd': readNd,\n    'tag': readTag\n  });\n\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nvar PARSERS = makeStructureNS(\n  NAMESPACE_URIS, {\n    'node': readNode,\n    'way': readWay\n  });\n\n\n/**\n * @classdesc\n * Feature format for reading data in the\n * [OSMXML format](http://wiki.openstreetmap.org/wiki/OSM_XML).\n *\n * @api\n */\nvar OSMXML = /*@__PURE__*/(function (XMLFeature) {\n  function OSMXML() {\n    XMLFeature.call(this);\n\n    /**\n     * @inheritDoc\n     */\n    this.dataProjection = getProjection('EPSG:4326');\n  }\n\n  if ( XMLFeature ) OSMXML.__proto__ = XMLFeature;\n  OSMXML.prototype = Object.create( XMLFeature && XMLFeature.prototype );\n  OSMXML.prototype.constructor = OSMXML;\n\n  /**\n   * @inheritDoc\n   */\n  OSMXML.prototype.readFeaturesFromNode = function readFeaturesFromNode (node, opt_options) {\n    var options = this.getReadOptions(node, opt_options);\n    if (node.localName == 'osm') {\n      var state = pushParseAndPop({\n        nodes: {},\n        ways: [],\n        features: []\n      }, PARSERS, node, [options]);\n      // parse nodes in ways\n      for (var j = 0; j < state.ways.length; j++) {\n        var values = /** @type {Object} */ (state.ways[j]);\n        /** @type {Array<number>} */\n        var flatCoordinates = [];\n        for (var i = 0, ii = values.ndrefs.length; i < ii; i++) {\n          var point = state.nodes[values.ndrefs[i]];\n          extend(flatCoordinates, point);\n        }\n        var geometry = (void 0);\n        if (values.ndrefs[0] == values.ndrefs[values.ndrefs.length - 1]) {\n          // closed way\n          geometry = new Polygon(flatCoordinates, GeometryLayout.XY, [flatCoordinates.length]);\n        } else {\n          geometry = new LineString(flatCoordinates, GeometryLayout.XY);\n        }\n        transformWithOptions(geometry, false, options);\n        var feature = new Feature(geometry);\n        feature.setId(values.id);\n        feature.setProperties(values.tags);\n        state.features.push(feature);\n      }\n      if (state.features) {\n        return state.features;\n      }\n    }\n    return [];\n  };\n\n  return OSMXML;\n}(XMLFeature));\n\n\n/**\n * @const\n * @type {Object<string, Object<string, import(\"../xml.js\").Parser>>}\n */\nvar NODE_PARSERS = makeStructureNS(\n  NAMESPACE_URIS, {\n    'tag': readTag\n  });\n\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction readNode(node, objectStack) {\n  var options = /** @type {import(\"./Feature.js\").ReadOptions} */ (objectStack[0]);\n  var state = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  var id = node.getAttribute('id');\n  /** @type {import(\"../coordinate.js\").Coordinate} */\n  var coordinates = [\n    parseFloat(node.getAttribute('lon')),\n    parseFloat(node.getAttribute('lat'))\n  ];\n  state.nodes[id] = coordinates;\n\n  var values = pushParseAndPop({\n    tags: {}\n  }, NODE_PARSERS, node, objectStack);\n  if (!isEmpty(values.tags)) {\n    var geometry = new Point(coordinates);\n    transformWithOptions(geometry, false, options);\n    var feature = new Feature(geometry);\n    feature.setId(id);\n    feature.setProperties(values.tags);\n    state.features.push(feature);\n  }\n}\n\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction readWay(node, objectStack) {\n  var id = node.getAttribute('id');\n  var values = pushParseAndPop({\n    id: id,\n    ndrefs: [],\n    tags: {}\n  }, WAY_PARSERS, node, objectStack);\n  var state = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  state.ways.push(values);\n}\n\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction readNd(node, objectStack) {\n  var values = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  values.ndrefs.push(node.getAttribute('ref'));\n}\n\n\n/**\n * @param {Element} node Node.\n * @param {Array<*>} objectStack Object stack.\n */\nfunction readTag(node, objectStack) {\n  var values = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n  values.tags[node.getAttribute('k')] = node.getAttribute('v');\n}\n\n\nexport default OSMXML;\n\n//# sourceMappingURL=OSMXML.js.map","/**\n * @module ol/style/Text\n */\nimport Fill from './Fill.js';\nimport TextPlacement from './TextPlacement.js';\n\n\n/**\n * The default fill color to use if no fill was set at construction time; a\n * blackish `#333`.\n *\n * @const {string}\n */\nvar DEFAULT_FILL_COLOR = '#333';\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [font] Font style as CSS 'font' value, see:\n * https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/font. Default is '10px sans-serif'\n * @property {number} [maxAngle] When `placement` is set to `'line'`, allow a maximum angle between adjacent characters.\n * The expected value is in radians, and the default is 45° (`Math.PI / 4`).\n * @property {number} [offsetX=0] Horizontal text offset in pixels. A positive will shift the text right.\n * @property {number} [offsetY=0] Vertical text offset in pixels. A positive will shift the text down.\n * @property {boolean} [overflow=false] For polygon labels or when `placement` is set to `'line'`, allow text to exceed\n * the width of the polygon at the label position or the length of the path that it follows.\n * @property {import(\"./TextPlacement.js\").default|string} [placement] Text placement.\n * @property {number} [scale] Scale.\n * @property {boolean} [rotateWithView=false] Whether to rotate the text with the view.\n * @property {number} [rotation=0] Rotation in radians (positive rotation clockwise).\n * @property {string} [text] Text content.\n * @property {string} [textAlign] Text alignment. Possible values: 'left', 'right', 'center', 'end' or 'start'.\n * Default is 'center' for `placement: 'point'`. For `placement: 'line'`, the default is to let the renderer choose a\n * placement where `maxAngle` is not exceeded.\n * @property {string} [textBaseline='middle'] Text base line. Possible values: 'bottom', 'top', 'middle', 'alphabetic',\n * 'hanging', 'ideographic'.\n * @property {import(\"./Fill.js\").default} [fill] Fill style. If none is provided, we'll use a dark fill-style (#333).\n * @property {import(\"./Stroke.js\").default} [stroke] Stroke style.\n * @property {import(\"./Fill.js\").default} [backgroundFill] Fill style for the text background when `placement` is\n * `'point'`. Default is no fill.\n * @property {import(\"./Stroke.js\").default} [backgroundStroke] Stroke style for the text background  when `placement`\n * is `'point'`. Default is no stroke.\n * @property {Array<number>} [padding=[0, 0, 0, 0]] Padding in pixels around the text for decluttering and background. The order of\n * values in the array is `[top, right, bottom, left]`.\n */\n\n\n/**\n * @classdesc\n * Set text style for vector features.\n * @api\n */\nvar Text = function Text(opt_options) {\n\n  var options = opt_options || {};\n\n  /**\n  * @private\n  * @type {string|undefined}\n  */\n  this.font_ = options.font;\n\n  /**\n  * @private\n  * @type {number|undefined}\n  */\n  this.rotation_ = options.rotation;\n\n  /**\n  * @private\n  * @type {boolean|undefined}\n  */\n  this.rotateWithView_ = options.rotateWithView;\n\n  /**\n  * @private\n  * @type {number|undefined}\n  */\n  this.scale_ = options.scale;\n\n  /**\n  * @private\n  * @type {string|undefined}\n  */\n  this.text_ = options.text;\n\n  /**\n  * @private\n  * @type {string|undefined}\n  */\n  this.textAlign_ = options.textAlign;\n\n  /**\n  * @private\n  * @type {string|undefined}\n  */\n  this.textBaseline_ = options.textBaseline;\n\n  /**\n  * @private\n  * @type {import(\"./Fill.js\").default}\n  */\n  this.fill_ = options.fill !== undefined ? options.fill :\n    new Fill({color: DEFAULT_FILL_COLOR});\n\n  /**\n  * @private\n  * @type {number}\n  */\n  this.maxAngle_ = options.maxAngle !== undefined ? options.maxAngle : Math.PI / 4;\n\n  /**\n  * @private\n  * @type {import(\"./TextPlacement.js\").default|string}\n  */\n  this.placement_ = options.placement !== undefined ? options.placement : TextPlacement.POINT;\n\n  /**\n  * @private\n  * @type {boolean}\n  */\n  this.overflow_ = !!options.overflow;\n\n  /**\n  * @private\n  * @type {import(\"./Stroke.js\").default}\n  */\n  this.stroke_ = options.stroke !== undefined ? options.stroke : null;\n\n  /**\n  * @private\n  * @type {number}\n  */\n  this.offsetX_ = options.offsetX !== undefined ? options.offsetX : 0;\n\n  /**\n  * @private\n  * @type {number}\n  */\n  this.offsetY_ = options.offsetY !== undefined ? options.offsetY : 0;\n\n  /**\n  * @private\n  * @type {import(\"./Fill.js\").default}\n  */\n  this.backgroundFill_ = options.backgroundFill ? options.backgroundFill : null;\n\n  /**\n  * @private\n  * @type {import(\"./Stroke.js\").default}\n  */\n  this.backgroundStroke_ = options.backgroundStroke ? options.backgroundStroke : null;\n\n  /**\n  * @private\n  * @type {Array<number>}\n  */\n  this.padding_ = options.padding === undefined ? null : options.padding;\n};\n\n/**\n* Clones the style.\n* @return {Text} The cloned style.\n* @api\n*/\nText.prototype.clone = function clone () {\n  return new Text({\n    font: this.getFont(),\n    placement: this.getPlacement(),\n    maxAngle: this.getMaxAngle(),\n    overflow: this.getOverflow(),\n    rotation: this.getRotation(),\n    rotateWithView: this.getRotateWithView(),\n    scale: this.getScale(),\n    text: this.getText(),\n    textAlign: this.getTextAlign(),\n    textBaseline: this.getTextBaseline(),\n    fill: this.getFill() ? this.getFill().clone() : undefined,\n    stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n    offsetX: this.getOffsetX(),\n    offsetY: this.getOffsetY(),\n    backgroundFill: this.getBackgroundFill() ? this.getBackgroundFill().clone() : undefined,\n    backgroundStroke: this.getBackgroundStroke() ? this.getBackgroundStroke().clone() : undefined\n  });\n};\n\n/**\n* Get the `overflow` configuration.\n* @return {boolean} Let text overflow the length of the path they follow.\n* @api\n*/\nText.prototype.getOverflow = function getOverflow () {\n  return this.overflow_;\n};\n\n/**\n* Get the font name.\n* @return {string|undefined} Font.\n* @api\n*/\nText.prototype.getFont = function getFont () {\n  return this.font_;\n};\n\n/**\n* Get the maximum angle between adjacent characters.\n* @return {number} Angle in radians.\n* @api\n*/\nText.prototype.getMaxAngle = function getMaxAngle () {\n  return this.maxAngle_;\n};\n\n/**\n* Get the label placement.\n* @return {import(\"./TextPlacement.js\").default|string} Text placement.\n* @api\n*/\nText.prototype.getPlacement = function getPlacement () {\n  return this.placement_;\n};\n\n/**\n* Get the x-offset for the text.\n* @return {number} Horizontal text offset.\n* @api\n*/\nText.prototype.getOffsetX = function getOffsetX () {\n  return this.offsetX_;\n};\n\n/**\n* Get the y-offset for the text.\n* @return {number} Vertical text offset.\n* @api\n*/\nText.prototype.getOffsetY = function getOffsetY () {\n  return this.offsetY_;\n};\n\n/**\n* Get the fill style for the text.\n* @return {import(\"./Fill.js\").default} Fill style.\n* @api\n*/\nText.prototype.getFill = function getFill () {\n  return this.fill_;\n};\n\n/**\n* Determine whether the text rotates with the map.\n* @return {boolean|undefined} Rotate with map.\n* @api\n*/\nText.prototype.getRotateWithView = function getRotateWithView () {\n  return this.rotateWithView_;\n};\n\n/**\n* Get the text rotation.\n* @return {number|undefined} Rotation.\n* @api\n*/\nText.prototype.getRotation = function getRotation () {\n  return this.rotation_;\n};\n\n/**\n* Get the text scale.\n* @return {number|undefined} Scale.\n* @api\n*/\nText.prototype.getScale = function getScale () {\n  return this.scale_;\n};\n\n/**\n* Get the stroke style for the text.\n* @return {import(\"./Stroke.js\").default} Stroke style.\n* @api\n*/\nText.prototype.getStroke = function getStroke () {\n  return this.stroke_;\n};\n\n/**\n* Get the text to be rendered.\n* @return {string|undefined} Text.\n* @api\n*/\nText.prototype.getText = function getText () {\n  return this.text_;\n};\n\n/**\n* Get the text alignment.\n* @return {string|undefined} Text align.\n* @api\n*/\nText.prototype.getTextAlign = function getTextAlign () {\n  return this.textAlign_;\n};\n\n/**\n* Get the text baseline.\n* @return {string|undefined} Text baseline.\n* @api\n*/\nText.prototype.getTextBaseline = function getTextBaseline () {\n  return this.textBaseline_;\n};\n\n/**\n* Get the background fill style for the text.\n* @return {import(\"./Fill.js\").default} Fill style.\n* @api\n*/\nText.prototype.getBackgroundFill = function getBackgroundFill () {\n  return this.backgroundFill_;\n};\n\n/**\n* Get the background stroke style for the text.\n* @return {import(\"./Stroke.js\").default} Stroke style.\n* @api\n*/\nText.prototype.getBackgroundStroke = function getBackgroundStroke () {\n  return this.backgroundStroke_;\n};\n\n/**\n* Get the padding for the text.\n* @return {Array<number>} Padding.\n* @api\n*/\nText.prototype.getPadding = function getPadding () {\n  return this.padding_;\n};\n\n/**\n* Set the `overflow` property.\n*\n* @param {boolean} overflow Let text overflow the path that it follows.\n* @api\n*/\nText.prototype.setOverflow = function setOverflow (overflow) {\n  this.overflow_ = overflow;\n};\n\n/**\n* Set the font.\n*\n* @param {string|undefined} font Font.\n* @api\n*/\nText.prototype.setFont = function setFont (font) {\n  this.font_ = font;\n};\n\n/**\n* Set the maximum angle between adjacent characters.\n*\n* @param {number} maxAngle Angle in radians.\n* @api\n*/\nText.prototype.setMaxAngle = function setMaxAngle (maxAngle) {\n  this.maxAngle_ = maxAngle;\n};\n\n/**\n* Set the x offset.\n*\n* @param {number} offsetX Horizontal text offset.\n* @api\n*/\nText.prototype.setOffsetX = function setOffsetX (offsetX) {\n  this.offsetX_ = offsetX;\n};\n\n/**\n* Set the y offset.\n*\n* @param {number} offsetY Vertical text offset.\n* @api\n*/\nText.prototype.setOffsetY = function setOffsetY (offsetY) {\n  this.offsetY_ = offsetY;\n};\n\n/**\n* Set the text placement.\n*\n* @param {import(\"./TextPlacement.js\").default|string} placement Placement.\n* @api\n*/\nText.prototype.setPlacement = function setPlacement (placement) {\n  this.placement_ = placement;\n};\n\n/**\n* Set the fill.\n*\n* @param {import(\"./Fill.js\").default} fill Fill style.\n* @api\n*/\nText.prototype.setFill = function setFill (fill) {\n  this.fill_ = fill;\n};\n\n/**\n* Set the rotation.\n*\n* @param {number|undefined} rotation Rotation.\n* @api\n*/\nText.prototype.setRotation = function setRotation (rotation) {\n  this.rotation_ = rotation;\n};\n\n/**\n* Set the scale.\n*\n* @param {number|undefined} scale Scale.\n* @api\n*/\nText.prototype.setScale = function setScale (scale) {\n  this.scale_ = scale;\n};\n\n/**\n* Set the stroke.\n*\n* @param {import(\"./Stroke.js\").default} stroke Stroke style.\n* @api\n*/\nText.prototype.setStroke = function setStroke (stroke) {\n  this.stroke_ = stroke;\n};\n\n/**\n* Set the text.\n*\n* @param {string|undefined} text Text.\n* @api\n*/\nText.prototype.setText = function setText (text) {\n  this.text_ = text;\n};\n\n/**\n* Set the text alignment.\n*\n* @param {string|undefined} textAlign Text align.\n* @api\n*/\nText.prototype.setTextAlign = function setTextAlign (textAlign) {\n  this.textAlign_ = textAlign;\n};\n\n/**\n* Set the text baseline.\n*\n* @param {string|undefined} textBaseline Text baseline.\n* @api\n*/\nText.prototype.setTextBaseline = function setTextBaseline (textBaseline) {\n  this.textBaseline_ = textBaseline;\n};\n\n/**\n* Set the background fill.\n*\n* @param {import(\"./Fill.js\").default} fill Fill style.\n* @api\n*/\nText.prototype.setBackgroundFill = function setBackgroundFill (fill) {\n  this.backgroundFill_ = fill;\n};\n\n/**\n* Set the background stroke.\n*\n* @param {import(\"./Stroke.js\").default} stroke Stroke style.\n* @api\n*/\nText.prototype.setBackgroundStroke = function setBackgroundStroke (stroke) {\n  this.backgroundStroke_ = stroke;\n};\n\n/**\n* Set the padding (`[top, right, bottom, left]`).\n*\n* @param {!Array<number>} padding Padding.\n* @api\n*/\nText.prototype.setPadding = function setPadding (padding) {\n  this.padding_ = padding;\n};\n\nexport default Text;\n\n//# sourceMappingURL=Text.js.map","\"use strict\";\nimport Map from 'ol/Map.js';\nimport WebGLMap from 'ol/WebGLMap.js';\nimport {WEBGL} from 'ol/has.js'\nimport View from 'ol/View.js';\nimport {defaults as defaultControls, Attribution as AttributionControl, ScaleLine as ScaleLineControl} from 'ol/control.js';\nimport MessureControl from './MessureControl.js';\nimport LayerSwitcher from 'ol-layerswitcher';\nimport {all as allStrategy} from 'ol/loadingstrategy';\nimport {bbox as bboxStrategy} from 'ol/loadingstrategy.js';\nimport LayerGroup from 'ol/layer/Group';\nimport LayerImage from 'ol/layer/Image';\nimport TileLayer from 'ol/layer/Tile';\nimport OSM from 'ol/source/OSM.js';\nimport XYZ from 'ol/source/XYZ';\nimport {fromLonLat, toLonLat} from 'ol/proj.js';\nimport VectorLayer from 'ol/layer/Vector.js';\nimport VectorSource from 'ol/source/Vector.js';\nimport VectorTileLayer from 'ol/layer/VectorTile.js';\nimport VectorTileSource from 'ol/source/VectorTile.js';\nimport OSMXML from 'ol/format/OSMXML.js';\nimport {Circle as CircleStyle, Fill, Stroke, Style, Text} from 'ol/style.js';\n\n\nconst coordinate_cccamp19 = fromLonLat([13.30735, 53.03127]);\n\nvar MapClass;\n\nif (WEBGL && false) {\n\tMapClass = WebGLMap;\n} else {\n\tMapClass = Map;\n}\n\nvar styles = {\n\t'amenity': {\n\t\t'parking': new Style({\n\t\t\tstroke: new Stroke({\n\t\t\t\tcolor: 'rgba(170, 170, 170, 1.0)',\n\t\t\t\twidth: 1\n\t\t\t}),\n\t\t\tfill: new Fill({\n\t\t\t\tcolor: 'rgba(170, 170, 170, 0.3)'\n\t\t\t})\n\t\t})\n\t},\n\t'building': {\n\t\t'.*': new Style({\n\t\t\tzIndex: 100,\n\t\t\tstroke: new Stroke({\n\t\t\t\tcolor: 'rgba(246, 99, 79, 1.0)',\n\t\t\t\twidth: 1\n\t\t\t}),\n\t\t\tfill: new Fill({\n\t\t\t\tcolor: 'rgba(246, 99, 79, 0.3)'\n\t\t\t}),\n\t\t\ttext: new Text({\n\t\t\t\tfont: '12px Calibri,sans-serif',\n\t\t\t\tfill: new Fill({\n\t\t\t\t\tcolor: '#000'\n\t\t\t\t}),\n\t\t\t\tstroke: new Stroke({\n\t\t\t\t\tcolor: '#fff',\n\t\t\t\t\twidth: 3\n\t\t\t\t})\n\t\t\t})\n\t\t})\n\t},\n\t'highway': {\n\t\t'service': new Style({\n\t\t\tstroke: new Stroke({\n\t\t\t\tcolor: 'rgba(255, 255, 255, 1.0)',\n\t\t\t\twidth: 2\n\t\t\t})\n\t\t}),\n\t\t'.*': new Style({\n\t\t\tstroke: new Stroke({\n\t\t\t\tcolor: 'rgba(255, 255, 255, 1.0)',\n\t\t\t\twidth: 3\n\t\t\t})\n\t\t})\n\t},\n\t'landuse': {\n\t\t'forest|grass|allotments': new Style({\n\t\t\tstroke: new Stroke({\n\t\t\t\tcolor: 'rgba(0, 0, 170, 1.0)',\n\t\t\t\twidth: 1\n\t\t\t}),\n\t\t\tfill: new Fill({\n\t\t\t\tcolor: 'rgba(0, 0, 170, 0.3)'\n\t\t\t}),\n\t\t\ttext: new Text({\n\t\t\t\tfont: '12px Calibri,sans-serif',\n\t\t\t\tfill: new Fill({\n\t\t\t\t\tcolor: '#000'\n\t\t\t\t}),\n\t\t\t\tstroke: new Stroke({\n\t\t\t\t\tcolor: '#fff',\n\t\t\t\t\twidth: 3\n\t\t\t\t})\n\t\t\t})\n\t\t})\n\t},\n\t'natural': {\n\t\t'tree': new Style({\n\t\t\timage: new CircleStyle({\n\t\t\t\tradius: 2,\n\t\t\t\tfill: new Fill({\n\t\t\t\t\t     color: 'rgba(140, 208, 95, 1.0)'\n\t\t\t\t\t   }),\n\t\t\t\tstroke: null\n\t\t\t})\n\t\t})\n\t},\n\t'name': {\n\t\t'.*': new Style({\n\t\t\ttext: new Text({\n\t\t\t\tfont: '12px Calibri,sans-serif',\n\t\t\t\tfill: new Fill({\n\t\t\t\t\tcolor: '#000'\n\t\t\t\t}),\n\t\t\t\tstroke: new Stroke({\n\t\t\t\t\tcolor: '#fff',\n\t\t\t\t\twidth: 3\n\t\t\t\t})\n\t\t\t})\n\t\t})\n\t}\n};\n\nvar vectorSource = new VectorSource({\n\tformat: new OSMXML(),\n\turl: 'https://seafile.milliways.info/f/688170149668429f9598/?dl=1',\n\tstrategy: allStrategy,\n\tattributions: '&#169;<a href=\"https://git.milliways.info/Milliways/cccamp19-map\">Milliways</a>',\n});\n\nvar messureSource = new VectorSource();\nvar messureLayer = new VectorLayer({\n\ttitle: 'Messure',\n\tsource: messureSource,\n\tstyle: new Style({\n\t\tfill: new Fill({\n\t\t\tcolor: 'rgba(255, 255, 255, 0.2)'\n\t\t}),\n\t\tstroke: new Stroke({\n\t\t\tcolor: '#ffcc33',\n\t\t\twidth: 2\n\t\t}),\n\t\timage: new CircleStyle({\n\t\t\tradius: 7,\n\t\t\tfill: new Fill({\n\t\t\t\tcolor: '#ffcc33'\n\t\t\t})\n\t\t})\n\t})\n});\nvar orthoLayer = new TileLayer({\n\ttitle: 'Ortho Imagery',\n\ttype: 'base',\n\tsource: new XYZ({\n\t\turl: 'https://cdn.eventphone.de/maps/ziegeleipark/{z}/{x}/{y}.jpg',\n\t\tmaxZoom: 22,\n\t\tminZoom: 14,\n\t\tattributions: 'Bianco Veigel & Rene Hansen',\n\t\tattributionsCollapsible: false,\n\t})\n});\n\nvar vectorLayer =  new VectorLayer({\n      title: 'Milliways Overlay',\n      source: vectorSource,\n      style: function(feature) {\n        for (var key in styles) {\n          var value = feature.get(key);\n          if (value !== undefined) {\n            for (var regexp in styles[key]) {\n              if (new RegExp(regexp).test(value)) {\n                var style = styles[key][regexp];\n                var text = feature.get('name');\n                if(text !== undefined ) {\n                  if(feature.get('size') !== undefined) {\n                    text += '\\n' + feature.get('size');\n                  }\n                }\n                style.getText().setText(text);\n                return style;\n              }\n            }\n          }\n        }\n        return null;\n      }\n});\n\n\nvar osmLayer = new TileLayer({\n\ttitle: 'OSM',\n\ttype: 'base',\n\tsource: new OSM()\n});\n\nvar map = new MapClass({\n\ttarget: 'map',\n\tcontrols: defaultControls().extend([\n\t\tnew LayerSwitcher(),\n\t\tnew ScaleLineControl(),\n\t\tnew MessureControl({ source: messureSource}),\n\t]),\n\tnumZoomLevels: 19,\n\tunits: 'm',\n\tlayers: [\n\t\tnew LayerGroup({\n\t\t\ttitle: 'Base Layers',\n\t\t\tlayers: [\n\t\t\t\torthoLayer,\n\t\t\t\tosmLayer\n\t\t\t]\n\t\t}),\n\t\tnew LayerGroup({\n\t\t\ttitle: 'overlays',\n\t\t\tlayers: [\n\t\t\t\tvectorLayer,\n\t\t\t\tmessureLayer,\n\t\t\t]\n\t\t})\n\t],\n\tview: new View({\n\t\tcenter: coordinate_cccamp19,\n\t\tzoom: 17\n\t})\n});\n\n\nfunction parseURL(url) {\n\n\tvar parser = document.createElement('a'),\n\t\tsearchObject = {},\n\t\tqueries, split, i;\n\n\t// Let the browser do the work\n\tparser.href = url;\n\n\t// Convert query string to object\n\tqueries = parser.search.replace(/^\\?/, '').split('&');\n\tfor( i = 0; i < queries.length; i++ ) {\n\t\tsplit = queries[i].split('=');\n\t\tif(searchObject[split[0]]) {\n\t\t\tif(!Array.isArray(searchObject[split[0]])) {\n\t\t\t\tsearchObject[split[0]] = [searchObject[split[0]]];\n\t\t\t}\n\t\t\tsearchObject[split[0]].push(decodeURI(split[1]));\n\t\t} else {\n\t\t\tsearchObject[split[0]] = decodeURI(split[1]);\n\t\t}\n\t}\n\n\treturn {\n\t\tpathname: parser.pathname,\n\t\tsearch: parser.search,\n\t\tsearchObject: searchObject,\n\t\thash: parser.hash\n\t};\n\n}\n\n// start show coordinate in param and pars it [[[\nfunction generateHash(info) {\n\tvar params=[]\n\tfor( var param in info.searchObject) {\n\t\tif(param!='') {\n\t\t\tif(Array.isArray(info.searchObject[param])){\n\t\t\t\tinfo.searchObject[param].map(function(value) {\n\t\t\t\t\tparams.push(`${encodeURI(param)}=${encodeURI(value)}`);\n\t\t\t\t});\n\t\t\t} else {\n\t\t\t\tparams.push(`${encodeURI(param)}=${encodeURI(info.searchObject[param])}`);\n\t\t\t}\n\t\t}\n\t}\n\treturn `#${info.pathname}?${params.join('&')}`;\n}\n\nvar layers = [orthoLayer, osmLayer, vectorLayer];\nvar hash_info;\n\nvar coordinate_parser = /^(\\d+)\\/(-?\\d*\\.?\\d*)\\/(-?\\d*\\.?\\d*)/;\n\nfunction parseHash() {\n\thash_info=parseURL(location.hash.substr(1))\n\tif( hash_info.searchObject['map'] && coordinate_parser.test(hash_info.searchObject['map'])){\n\t\tvar map_info = coordinate_parser.exec(hash_info.searchObject['map']);\n\t\tmap.getView().setCenter(fromLonLat([Number(map_info[3]), Number(map_info[2])]));\n\t\tmap.getView().setZoom(map_info[1]);\n\t}\n\tif( hash_info.searchObject['layer']) {\n\t\tvar _layers = hash_info.searchObject['layer'];\n\t\tif(!Array.isArray(_layers)) {\n\t\t\t_layers = [_layers];\n\t\t}\n\t\tlayers.map(function(layer){\n\t\t\tlayer.setVisible(\n\t\t\t\t_layers.indexOf(layer.get('title')) >=0\n\t\t\t);\n\t\t});\n\t}\n}\n\nparseHash();\nwindow.onhashchange = function() {\n\tparseHash()\n};\n\nmap.on(\"moveend\", function(evt){\n\tvar map = evt.map;\n\tvar [lon, lat] = toLonLat(map.getView().getCenter());\n\tvar zoom = map.getView().getZoom();\n\thash_info.searchObject['map'] = `${zoom}/${lat}/${lon}`;\n\tlocation.hash = generateHash(hash_info);\n});\n\n// map types\nlayers.map(function(layer){\n\tlayer.addEventListener('change:visible',function(e){\n\t\thash_info=parseURL(location.hash.substr(1));\n\t\tvar _layers = [];\n\t\tlayers.map(function(layer) {\n\t\t\tif(layer.getVisible()){\n\t\t\t\t_layers.push(layer.get('title'));\n\t\t\t}\n\t\t});\n\t\thash_info.searchObject['layer'] = _layers;\n\t\tlocation.hash = generateHash(hash_info);\n\t});\n});\n\n// end coordinate parser ]]]\n\ndocument.Map = map;\n\n"],"sourceRoot":""}
\ No newline at end of file
diff --git a/src/MessureControl.js b/src/MessureControl.js
new file mode 100644
index 0000000..117d106
--- /dev/null
+++ b/src/MessureControl.js
@@ -0,0 +1,410 @@
+/**
+ * @module ol/control/MessureControl
+ */
+import Control from 'ol/control/Control.js';
+import {CLASS_CONTROL, CLASS_UNSELECTABLE, CLASS_UNSUPPORTED} from 'ol/css.js';
+import {replaceNode} from 'ol/dom.js';
+import {listen} from 'ol/events.js';
+import EventType from 'ol/events/EventType.js';
+import {Vector as VectorSource} from 'ol/source';
+import Overlay from 'ol/Overlay.js';
+import {LineString, Polygon} from 'ol/geom.js';
+import Draw from 'ol/interaction/Draw.js';
+import {Circle as CircleStyle, Fill, Stroke, Style} from 'ol/style.js';
+import {getArea, getLength} from 'ol/sphere.js';
+import {unByKey} from 'ol/Observable.js';
+
+/**
+ * @typedef {Object} Options
+ * @property {string} [className='ol-full-screen'] CSS class name.
+ * @property {string|Text} [label='\u2922'] Text label to use for the button.
+ * Instead of text, also an element (e.g. a `span` element) can be used.
+ * @property {string|Text} [labelActive='\u00d7'] Text label to use for the
+ * button when full-screen is active.
+ * Instead of text, also an element (e.g. a `span` element) can be used.
+ * @property {string} [tipLabel='Toggle full-screen'] Text label to use for the button tip.
+ * @property {boolean} [keys=false] Full keyboard access.
+ * @property {HTMLElement|string} [target] Specify a target if you want the
+ * control to be rendered outside of the map's viewport.
+ * @property {HTMLElement|string} [source] The element to be displayed
+ * fullscreen. When not provided, the element containing the map viewport will
+ * be displayed fullscreen.
+ */
+
+
+/**
+ * @classdesc
+ * Provides a button that when clicked fills up the full screen with the map.
+ * The full screen source element is by default the element containing the map viewport unless
+ * overridden by providing the `source` option. In which case, the dom
+ * element introduced using this parameter will be displayed in full screen.
+ *
+ * When in full screen mode, a close button is shown to exit full screen mode.
+ * The [Fullscreen API](http://www.w3.org/TR/fullscreen/) is used to
+ * toggle the map in full screen mode.
+ *
+ * @api
+ */
+var MessureControl = /*@__PURE__*/(function (Control) {
+	function MessureControl(opt_options) {
+
+		var self = this;
+		var options = opt_options ? opt_options : {};
+
+		Control.call(this, {
+			element: document.createElement('div'),
+			target: options.target
+		});
+
+		this.active_ = options.active ? options.active : false;
+
+		/**
+		 * @private
+		 * @type {string}
+		 */
+		this.cssClassName_ = options.className !== undefined ? options.className :
+			'ol-messure';
+
+		var label = options.label !== undefined ? options.label : '\ud83d\udccf';
+
+		/**
+		 * @private
+		 * @type {Text}
+		 */
+		this.labelNode_ = typeof label === 'string' ?
+			document.createTextNode(label) : label;
+
+		var labelActive = options.labelActive !== undefined ? options.labelActive : '\ud83d\udccf';
+
+		/**
+		 * @private
+		 * @type {Text}
+		 */
+		this.labelActiveNode_ = typeof labelActive === 'string' ?
+			document.createTextNode(labelActive) : labelActive;
+
+		/**
+		 * @private
+		 * @type {HTMLElement}
+		 */
+		this.button_ = document.createElement('button');
+
+		var tipLabel = options.tipLabel ? options.tipLabel : 'messure distance';
+		this.setClassName_(this.button_, this.active_);
+		this.button_.setAttribute('type', 'button');
+		this.button_.title = tipLabel;
+		this.button_.appendChild(this.labelNode_);
+
+		listen(this.button_, EventType.CLICK,
+			this.handleClick_, this);
+
+		var cssClasses = this.cssClassName_ + ' ' + CLASS_UNSELECTABLE +
+				' ' + CLASS_CONTROL;
+		var element = this.element;
+		element.className = cssClasses;
+		element.appendChild(this.button_);
+
+		/**
+		 * @private
+		 * @type {boolean}
+		 * /
+		this.keys_ = options.keys !== undefined ? options.keys : false;*/
+
+		/**
+		 * @private
+		 * @type {HTMLElement|string|undefined}
+		 */
+		this.source_ = options.source ? options.source : new VectorSource();
+
+
+		/**
+		 * Currently drawn feature.
+		 * @type {module:ol/Feature~Feature}
+		 */
+		this.sketch;
+
+
+		/**
+		 * The help tooltip element.
+		 * @type {Element}
+		 */
+		this.helpTooltipElement;
+
+
+		/**
+		 * Overlay to show the help messages.
+		 * @type {module:ol/Overlay}
+		 */
+		this.helpTooltip;
+
+
+		/**
+		 * The measure tooltip element.
+		 * @type {Element}
+		 */
+		this.measureTooltipElement;
+
+
+		/**
+		 * Overlay to show the measurement.
+		 * @type {module:ol/Overlay}
+		 */
+		this.measureTooltip;
+
+
+		/**
+		 * Message to show when the user is drawing a polygon.
+		 * @type {string}
+		 */
+		this.continuePolygonMsg = 'Click to continue drawing the polygon';
+
+
+		/**
+		 * Message to show when the user is drawing a line.
+		 * @type {string}
+		 */
+		this.continueLineMsg = 'Click to continue drawing the line';
+
+		var type = (false ? 'Polygon' : 'LineString');
+		this.draw_ = new Draw({
+			source: this.source_,
+			type: type,
+			style: new Style({
+				fill: new Fill({
+					color: 'rgba(255, 255, 255, 0.2)'
+				}),
+				stroke: new Stroke({
+					color: 'rgba(0, 0, 0, 0.5)',
+					lineDash: [10, 10],
+					width: 2
+				}),
+				image: new CircleStyle({
+					radius: 5,
+					stroke: new Stroke({
+						color: 'rgba(0, 0, 0, 0.7)'
+					}),
+					fill: new Fill({
+						color: 'rgba(255, 255, 255, 0.2)'
+					})
+				})
+			})
+		});
+
+		var listener;
+		this.draw_.on('drawstart',
+			function(evt) {
+				// set sketch
+				self.sketch = evt.feature;
+
+				/** @type {module:ol/coordinate~Coordinate|undefined} */
+				var tooltipCoord = evt.coordinate;
+
+				listener = self.sketch.getGeometry().on('change', function(evt) {
+					var geom = evt.target;
+					var output;
+					if (geom instanceof Polygon) {
+						output = formatArea(geom);
+						tooltipCoord = geom.getInteriorPoint().getCoordinates();
+					} else if (geom instanceof LineString) {
+						output = self.formatLength(geom);
+						tooltipCoord = geom.getLastCoordinate();
+					}
+					self.measureTooltipElement.innerHTML = output;
+					self.measureTooltip.setPosition(tooltipCoord);
+				});
+			});
+
+		this.draw_.on('drawend',
+			function() {
+				self.measureTooltipElement.className = 'tooltip tooltip-static';
+				self.measureTooltip.setOffset([0, -7]);
+				// unset sketch
+				self.sketch = null;
+				// unset tooltip so that a new one can be created
+				self.measureTooltipElement = null;
+				self.createMeasureTooltip();
+				unByKey(listener);
+			});
+	
+	}
+
+	if ( Control ) MessureControl.__proto__ = Control;
+	MessureControl.prototype = Object.create( Control && Control.prototype );
+	MessureControl.prototype.constructor = MessureControl;
+
+	/**
+	 * @param {MouseEvent} event The event to handle
+	 * @private
+	 */
+	MessureControl.prototype.handleClick_ = function handleClick_ (event) {
+		event.preventDefault();
+		this.handleMessureControl_();
+	};
+
+
+	MessureControl.prototype.isActive = function isActive () {
+		return this.active_;
+	}
+
+	/**
+	 *
+	 */
+	MessureControl.prototype.activate = function activate () {
+		if (this.isActive()) {
+			return;
+		}
+		var map = this.getMap();
+		var self = this;
+		this.pointerMoveHandler_ = (e) => self.pointerMoveHandler(e);
+		map.on('pointermove', this.pointerMoveHandler_);
+		map.addInteraction(this.draw_);
+
+		this.active_ = true;
+	}
+
+	/**
+	 *
+	 */
+	MessureControl.prototype.deactivate = function deactivate () {
+		var map = this.getMap();
+		map.un('pointermove', this.pointerMoveHandler_);
+		map.removeInteraction(this.draw_);
+		this.helpTooltipElement.classList.add('hidden');
+		this.active_ = true;
+	}
+
+	/**
+	 * Handle pointer move.
+	 * @param {module:ol/MapBrowserEvent~MapBrowserEvent} evt The event.
+	 */
+	MessureControl.prototype.pointerMoveHandler = function pointerMoveHandler (evt) {
+		if (evt.dragging) {
+			return;
+		}
+		/** @type {string} */
+		var helpMsg = 'Click to start drawing';
+
+		if (this.sketch) {
+			var geom = (this.sketch.getGeometry());
+			if (geom instanceof Polygon) {
+				helpMsg = this.continuePolygonMsg;
+			} else if (geom instanceof LineString) {
+				helpMsg = this.continueLineMsg;
+			}
+		}
+
+		this.helpTooltipElement.innerHTML = helpMsg;
+		this.helpTooltip.setPosition(evt.coordinate);
+
+		this.helpTooltipElement.classList.remove('hidden');
+	};
+
+	/**
+	 * @param {HTMLElement} element Target element
+	 * @param {boolean} fullscreen True if fullscreen class name should be active
+	 * @private
+	 */
+	MessureControl.prototype.setClassName_ = function setClassName_ (element, fullscreen) {
+		var activeClassName = this.cssClassName_ + '-true';
+		var inactiveClassName = this.cssClassName_ + '-false';
+		var nextClassName = fullscreen ? activeClassName : inactiveClassName;
+		element.classList.remove(activeClassName);
+		element.classList.remove(inactiveClassName);
+		element.classList.add(nextClassName);
+	};
+
+	/**
+	 * @inheritDoc
+	 * @api
+	 */
+	MessureControl.prototype.setMap = function setMap (map) {
+		Control.prototype.setMap.call(this, map);
+		var self = this;
+
+		if (map) {
+			this.createHelpTooltip();
+			map.getViewport().addEventListener('mouseout', function() {
+				self.helpTooltipElement.classList.add('hidden');
+			});
+			this.createMeasureTooltip();
+			this.createHelpTooltip();
+		}
+	};
+
+
+	/**
+	 * Creates a new help tooltip
+	 */
+	MessureControl.prototype.createHelpTooltip = function createHelpTooltip() {
+		if (this.helpTooltipElement) {
+			this.helpTooltipElement.parentNode.removeChild(this.helpTooltipElement);
+		}
+		this.helpTooltipElement = document.createElement('div');
+		this.helpTooltipElement.className = 'tooltip hidden';
+		this.helpTooltip = new Overlay({
+			element: this.helpTooltipElement,
+			offset: [15, 0],
+			positioning: 'center-left'
+		});
+		this.getMap().addOverlay(this.helpTooltip);
+	}
+
+	/**
+	 * @private
+	 */
+	MessureControl.prototype.handleMessureControl_ = function handleMessureControl_ () {
+		var map = this.getMap();
+		var self = this;
+		if (!map) {
+			return;
+		}
+		if (this.isActive()) {
+			//exitMessureControl();
+			this.deactivate();
+		} else {
+			this.activate();
+		}
+	};
+
+	/**
+	 * Creates a new measure tooltip
+	 */
+	MessureControl.prototype.createMeasureTooltip = function createMeasureTooltip() {
+		var map = this.getMap();
+		if (this.measureTooltipElement) {
+			measureTooltipElement.parentNode.removeChild(measureTooltipElement);
+		}
+		this.measureTooltipElement = document.createElement('div');
+		this.measureTooltipElement.className = 'tooltip tooltip-measure';
+		this.measureTooltip = new Overlay({
+			element: this.measureTooltipElement,
+			offset: [0, -15],
+			positioning: 'bottom-center'
+		});
+		map.addOverlay(this.measureTooltip);
+	}
+
+		/**
+		 * Format length output.
+		 * @param {module:ol/geom/LineString~LineString} line The line.
+		 * @return {string} The formatted length.
+		 */
+		MessureControl.prototype.formatLength = function formatLength(line) {
+			var length = getLength(line);
+			var output;
+			if (length > 100) {
+				output = (Math.round(length / 1000 * 100) / 100) +
+						' ' + 'km';
+			} else {
+				output = (Math.round(length * 100) / 100) +
+						' ' + 'm';
+			}
+			return output;
+		};
+
+	return MessureControl;
+}(Control));
+
+export default MessureControl;
+
+//# sourceMappingURL=MessureControl.js.map
diff --git a/src/app.js b/src/app.js
index 3c2c08e..363a8e6 100644
--- a/src/app.js
+++ b/src/app.js
@@ -3,7 +3,8 @@ import Map from 'ol/Map.js';
 import WebGLMap from 'ol/WebGLMap.js';
 import {WEBGL} from 'ol/has.js'
 import View from 'ol/View.js';
-import {defaults as defaultControls, Attribution as AttributionControl} from 'ol/control.js';
+import {defaults as defaultControls, Attribution as AttributionControl, ScaleLine as ScaleLineControl} from 'ol/control.js';
+import MessureControl from './MessureControl.js';
 import LayerSwitcher from 'ol-layerswitcher';
 import {all as allStrategy} from 'ol/loadingstrategy';
 import {bbox as bboxStrategy} from 'ol/loadingstrategy.js';
@@ -134,6 +135,26 @@ var vectorSource = new VectorSource({
 	attributions: '&#169;<a href="https://git.milliways.info/Milliways/cccamp19-map">Milliways</a>',
 });
 
+var messureSource = new VectorSource();
+var messureLayer = new VectorLayer({
+	title: 'Messure',
+	source: messureSource,
+	style: new Style({
+		fill: new Fill({
+			color: 'rgba(255, 255, 255, 0.2)'
+		}),
+		stroke: new Stroke({
+			color: '#ffcc33',
+			width: 2
+		}),
+		image: new CircleStyle({
+			radius: 7,
+			fill: new Fill({
+				color: '#ffcc33'
+			})
+		})
+	})
+});
 var orthoLayer = new TileLayer({
 	title: 'Ortho Imagery',
 	type: 'base',
@@ -182,7 +203,9 @@ var osmLayer = new TileLayer({
 var map = new MapClass({
 	target: 'map',
 	controls: defaultControls().extend([
-		new LayerSwitcher()
+		new LayerSwitcher(),
+		new ScaleLineControl(),
+		new MessureControl({ source: messureSource}),
 	]),
 	numZoomLevels: 19,
 	units: 'm',
@@ -197,7 +220,8 @@ var map = new MapClass({
 		new LayerGroup({
 			title: 'overlays',
 			layers: [
-				vectorLayer
+				vectorLayer,
+				messureLayer,
 			]
 		})
 	],
diff --git a/src/app.scss b/src/app.scss
index 531c261..5ed7789 100644
--- a/src/app.scss
+++ b/src/app.scss
@@ -12,3 +12,46 @@ html, body {
 	width: 100%;
 }
 
+
+.hidden {
+	display: none;
+}
+
+.ol-messure {
+    right: .25em;
+    top: 10em;
+    font-size: 1.5em;
+}
+
+.tooltip {
+	position: relative;
+	background: rgba(0, 0, 0, 0.5);
+	border-radius: 4px;
+	color: white;
+	padding: 4px 8px;
+	opacity: 0.7;
+	white-space: nowrap;
+}
+.tooltip-measure {
+	opacity: 1;
+	font-weight: bold;
+}
+.tooltip-static {
+	background-color: #ffcc33;
+	color: black;
+	border: 1px solid white;
+}
+.tooltip-measure:before,
+.tooltip-static:before {
+	border-top: 6px solid rgba(0, 0, 0, 0.5);
+	border-right: 6px solid transparent;
+	border-left: 6px solid transparent;
+	content: "";
+	position: absolute;
+	bottom: -6px;
+	margin-left: -7px;
+	left: 50%;
+}
+.tooltip-static:before {
+	border-top-color: #ffcc33;
+}
