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RiverRegulation/common/plugin/map/ol/v6.12.0/examples/reprojection.html

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<link rel="stylesheet" href="./css/ol.css" type="text/css">
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<link rel="stylesheet" href="reprojection.css">
<title>Raster Reprojection</title>
</head>
<body>
<header class="navbar navbar-expand-sm navbar-dark mb-3 py-0" role="navigation">
<a class="navbar-brand" href="https://openlayers.org/"><img src="./resources/logo-70x70.png" alt="">&nbsp;OpenLayers</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#olmenu" aria-controls="olmenu" aria-expanded="false" aria-label="Toggle navigation">
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This example uses OpenLayers v<span>6.12.0</span>. The <a id="latest-link" href="#" class="alert-link">latest</a> is v<span id="latest-version"></span>.
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<i class="fa fa-codepen fa-lg"></i> Edit
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<div class="span12">
<h4 id="title">Raster Reprojection</h4>
<p class="tags">
<span class="badge-group">
<a
href="./index.html?q=reprojection" class="badge badge-info">reprojection</a
><a
class="badge badge-info tag-modal-toggle text-white"
data-toggle="modal"
data-target="#tag-example-list"
data-title="reprojection"
data-content="
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./reprojection-image.html&quot;&gt;Image Reprojection&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./interpolation.html&quot;&gt;Interpolation&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./reprojection-wgs84.html&quot;&gt;OpenStreetMap Reprojection&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./scaleline-indiana-east.html&quot;&gt;OpenStreetMap Reprojection with ScaleLine Control&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action active&quot; href=&quot;./reprojection.html&quot;&gt;Raster Reprojection&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./reprojection-by-code.html&quot;&gt;Reprojection with EPSG.io Search&lt;/a&gt;"
tabindex="0"
>6</a>
</span>
<span class="badge-group">
<a
href="./index.html?q=projection" class="badge badge-info">projection</a
><a
class="badge badge-info tag-modal-toggle text-white"
data-toggle="modal"
data-target="#tag-example-list"
data-title="projection"
data-content="
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wms-custom-proj.html&quot;&gt;Custom Tiled WMS&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./reprojection-image.html&quot;&gt;Image Reprojection&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./reprojection-wgs84.html&quot;&gt;OpenStreetMap Reprojection&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./scaleline-indiana-east.html&quot;&gt;OpenStreetMap Reprojection with ScaleLine Control&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./projection-and-scale.html&quot;&gt;Projection and Scale&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action active&quot; href=&quot;./reprojection.html&quot;&gt;Raster Reprojection&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./reprojection-by-code.html&quot;&gt;Reprojection with EPSG.io Search&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wms-image-custom-proj.html&quot;&gt;Single Image WMS with Proj4js&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./sphere-mollweide.html&quot;&gt;Sphere Mollweide&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wms-no-proj.html&quot;&gt;WMS without Projection&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./zoomify.html&quot;&gt;Zoomify&lt;/a&gt;"
tabindex="0"
>11</a>
</span>
<span class="badge-group">
<a
href="./index.html?q=proj4js" class="badge badge-info">proj4js</a
><a
class="badge badge-info tag-modal-toggle text-white"
data-toggle="modal"
data-target="#tag-example-list"
data-title="proj4js"
data-content="
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./reprojection-image.html&quot;&gt;Image Reprojection&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action active&quot; href=&quot;./reprojection.html&quot;&gt;Raster Reprojection&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./reprojection-by-code.html&quot;&gt;Reprojection with EPSG.io Search&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wms-image-custom-proj.html&quot;&gt;Single Image WMS with Proj4js&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./sphere-mollweide.html&quot;&gt;Sphere Mollweide&lt;/a&gt;"
tabindex="0"
>5</a>
</span>
<span class="badge-group">
<a
href="./index.html?q=osm" class="badge badge-info">osm</a
><a
class="badge badge-info tag-modal-toggle text-white"
data-toggle="modal"
data-target="#tag-example-list"
data-title="osm"
data-content="
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./full-screen-source.html&quot;&gt;Full Screen Control with extended source element&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./osm-vector-tiles.html&quot;&gt;OSM Vector Tiles&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action active&quot; href=&quot;./reprojection.html&quot;&gt;Raster Reprojection&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./semi-transparent-layer.html&quot;&gt;Semi-Transparent Layer&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./webgl-tiles.html&quot;&gt;WebGL Tiles&lt;/a&gt;"
tabindex="0"
>5</a>
</span>
<span class="badge-group">
<a
href="./index.html?q=wms" class="badge badge-info">wms</a
><a
class="badge badge-info tag-modal-toggle text-white"
data-toggle="modal"
data-target="#tag-example-list"
data-title="wms"
data-content="
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wms-custom-proj.html&quot;&gt;Custom Tiled WMS&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action active&quot; href=&quot;./reprojection.html&quot;&gt;Raster Reprojection&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wms-image.html&quot;&gt;Single Image WMS&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wms-image-custom-proj.html&quot;&gt;Single Image WMS with Proj4js&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wms-tiled.html&quot;&gt;Tiled WMS&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wms-tiled-wrap-180.html&quot;&gt;Tiled WMS Wrapping&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wms-custom-tilegrid-512x256.html&quot;&gt;WMS 512x256 Tiles&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wms-capabilities.html&quot;&gt;WMS Capabilities Parsing&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wms-getlegendgraphic.html&quot;&gt;WMS GetLegendGraphic&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wms-time.html&quot;&gt;WMS Time&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wms-no-proj.html&quot;&gt;WMS without Projection&lt;/a&gt;"
tabindex="0"
>11</a>
</span>
<span class="badge-group">
<a
href="./index.html?q=wmts" class="badge badge-info">wmts</a
><a
class="badge badge-info tag-modal-toggle text-white"
data-toggle="modal"
data-target="#tag-example-list"
data-title="wmts"
data-content="
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wmts-hidpi.html&quot;&gt;High DPI WMTS&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wmts-ign.html&quot;&gt;IGN WMTS&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action active&quot; href=&quot;./reprojection.html&quot;&gt;Raster Reprojection&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wmts.html&quot;&gt;WMTS&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wmts-capabilities.html&quot;&gt;WMTS Capabilities Parsing&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wmts-layer-from-capabilities.html&quot;&gt;WMTS Layer from Capabilities&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wmts-dimensions.html&quot;&gt;WMTS Tile Transitions&lt;/a&gt;"
tabindex="0"
>7</a>
</span>
<span class="badge-group">
<a
href="./index.html?q=hidpi" class="badge badge-info">hidpi</a
><a
class="badge badge-info tag-modal-toggle text-white"
data-toggle="modal"
data-target="#tag-example-list"
data-title="hidpi"
data-content="
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wmts-hidpi.html&quot;&gt;High DPI WMTS&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action active&quot; href=&quot;./reprojection.html&quot;&gt;Raster Reprojection&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./xyz-retina.html&quot;&gt;XYZ Retina Tiles&lt;/a&gt;"
tabindex="0"
>3</a>
</span>
<span class="badge-group">
<a
href="./index.html?q=grid" class="badge badge-info">grid</a
><a
class="badge badge-info tag-modal-toggle text-white"
data-toggle="modal"
data-target="#tag-example-list"
data-title="grid"
data-content="
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./mapbox-vector-tiles-advanced.html&quot;&gt;Advanced Mapbox Vector Tiles&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wmts-ign.html&quot;&gt;IGN WMTS&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./print-to-scale.html&quot;&gt;Print to scale example&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action active&quot; href=&quot;./reprojection.html&quot;&gt;Raster Reprojection&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./vector-tiles-4326.html&quot;&gt;Vector tiles in EPSG:4326&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wms-custom-tilegrid-512x256.html&quot;&gt;WMS 512x256 Tiles&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wmts.html&quot;&gt;WMTS&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./wmts-dimensions.html&quot;&gt;WMTS Tile Transitions&lt;/a&gt;"
tabindex="0"
>8</a>
</span>
</p>
<div class="modal modal-tag-example" id="tag-example-list" tabindex="-1" role="dialog" aria-labelledby="tag-example-title" aria-hidden="true">
<div class="modal-dialog modal-dialog-scrollable" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="tag-example-title"></h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">&times;</span>
</button>
</div>
<div class="modal-body">
<div class="list-group"></div>
</div>
</div>
</div>
</div>
<div id="map" class="map"></div>
<form class="form-inline">
<div class="col-md-3">
<label for="base-layer">Base map:</label>
<select id="base-layer">
<option value="osm">OSM (EPSG:3857)</option>
<option value="wms4326">WMS (EPSG:4326)</option>
</select>
</div>
<div class="col-md-4">
<label for="overlay-layer">Overlay map:</label>
<select id="overlay-layer">
<option value="bng">British National Grid (EPSG:27700)</option>
<option value="wms21781">Swisstopo WMS (EPSG:21781)</option>
<option value="wmts3413">NASA Arctic WMTS (EPSG:3413)</option>
<option value="states">United States (EPSG:3857)</option>
</select>
</div>
<div class="col-md-5">
<label for="view-projection">View projection:</label>
<select id="view-projection">
<option value="EPSG:3857">Spherical Mercator (EPSG:3857)</option>
<option value="EPSG:4326">WGS 84 (EPSG:4326)</option>
<option value="ESRI:54009">Mollweide (ESRI:54009)</option>
<option value="EPSG:27700">British National Grid (EPSG:27700)</option>
<option value="EPSG:23032">ED50 / UTM zone 32N (EPSG:23032)</option>
<option value="EPSG:2163">US National Atlas Equal Area (EPSG:2163)</option>
<option value="EPSG:3413">NSIDC Polar Stereographic North (EPSG:3413)</option>
<option value="EPSG:5479">RSRGD2000 / MSLC2000 (EPSG:5479)</option>
</select>
</div>
</form>
<form class="form-inline">
<div class="col-md-auto">
<label>
Render reprojection edges:&nbsp;
<input type="checkbox" id="render-edges" />
</label>
</div>
</form>
</div>
<form method="POST" id="codepen-form" target="_blank" action="https://codesandbox.io/api/v1/sandboxes/define">
<input id="codesandbox-params" type="hidden" name="parameters">
</form>
</div>
<div class="row-fluid">
<div class="span12">
<p id="shortdesc">Demonstrates client-side raster reprojection between various projections.</p>
<div id="docs"><p>This example shows client-side raster reprojection between various projections.</p>
</div>
</div>
</div>
<div class="row-fluid">
<h5 class="source-heading">main.js</h5>
<pre><code id="example-js-source" class="language-js">import 'ol/ol.css';
import Map from &#x27;ol/Map&#x27;;
import TileGrid from &#x27;ol/tilegrid/TileGrid&#x27;;
import TileLayer from &#x27;ol/layer/Tile&#x27;;
import View from &#x27;ol/View&#x27;;
import WMTS, {optionsFromCapabilities} from &#x27;ol/source/WMTS&#x27;;
import WMTSCapabilities from &#x27;ol/format/WMTSCapabilities&#x27;;
import proj4 from &#x27;proj4&#x27;;
import {OSM, TileImage, TileWMS} from &#x27;ol/source&#x27;;
import {getCenter, getWidth} from &#x27;ol/extent&#x27;;
import {get as getProjection, transformExtent} from &#x27;ol/proj&#x27;;
import {register} from &#x27;ol/proj/proj4&#x27;;
proj4.defs(
&#x27;EPSG:27700&#x27;,
&#x27;+proj&#x3D;tmerc +lat_0&#x3D;49 +lon_0&#x3D;-2 +k&#x3D;0.9996012717 &#x27; +
&#x27;+x_0&#x3D;400000 +y_0&#x3D;-100000 +ellps&#x3D;airy &#x27; +
&#x27;+towgs84&#x3D;446.448,-125.157,542.06,0.15,0.247,0.842,-20.489 &#x27; +
&#x27;+units&#x3D;m +no_defs&#x27;
);
proj4.defs(
&#x27;EPSG:23032&#x27;,
&#x27;+proj&#x3D;utm +zone&#x3D;32 +ellps&#x3D;intl &#x27; +
&#x27;+towgs84&#x3D;-87,-98,-121,0,0,0,0 +units&#x3D;m +no_defs&#x27;
);
proj4.defs(
&#x27;EPSG:5479&#x27;,
&#x27;+proj&#x3D;lcc +lat_1&#x3D;-76.66666666666667 +lat_2&#x3D;&#x27; +
&#x27;-79.33333333333333 +lat_0&#x3D;-78 +lon_0&#x3D;163 +x_0&#x3D;7000000 +y_0&#x3D;5000000 &#x27; +
&#x27;+ellps&#x3D;GRS80 +towgs84&#x3D;0,0,0,0,0,0,0 +units&#x3D;m +no_defs&#x27;
);
proj4.defs(
&#x27;EPSG:21781&#x27;,
&#x27;+proj&#x3D;somerc +lat_0&#x3D;46.95240555555556 &#x27; +
&#x27;+lon_0&#x3D;7.439583333333333 +k_0&#x3D;1 +x_0&#x3D;600000 +y_0&#x3D;200000 +ellps&#x3D;bessel &#x27; +
&#x27;+towgs84&#x3D;674.4,15.1,405.3,0,0,0,0 +units&#x3D;m +no_defs&#x27;
);
proj4.defs(
&#x27;EPSG:3413&#x27;,
&#x27;+proj&#x3D;stere +lat_0&#x3D;90 +lat_ts&#x3D;70 +lon_0&#x3D;-45 +k&#x3D;1 &#x27; +
&#x27;+x_0&#x3D;0 +y_0&#x3D;0 +datum&#x3D;WGS84 +units&#x3D;m +no_defs&#x27;
);
proj4.defs(
&#x27;EPSG:2163&#x27;,
&#x27;+proj&#x3D;laea +lat_0&#x3D;45 +lon_0&#x3D;-100 +x_0&#x3D;0 +y_0&#x3D;0 &#x27; +
&#x27;+a&#x3D;6370997 +b&#x3D;6370997 +units&#x3D;m +no_defs&#x27;
);
proj4.defs(
&#x27;ESRI:54009&#x27;,
&#x27;+proj&#x3D;moll +lon_0&#x3D;0 +x_0&#x3D;0 +y_0&#x3D;0 +datum&#x3D;WGS84 &#x27; + &#x27;+units&#x3D;m +no_defs&#x27;
);
register(proj4);
const proj27700 &#x3D; getProjection(&#x27;EPSG:27700&#x27;);
proj27700.setExtent([-650000, -150000, 1350000, 1450000]);
const proj23032 &#x3D; getProjection(&#x27;EPSG:23032&#x27;);
proj23032.setExtent([-1206118.71, 4021309.92, 1295389.0, 8051813.28]);
const proj5479 &#x3D; getProjection(&#x27;EPSG:5479&#x27;);
proj5479.setExtent([6825737.53, 4189159.8, 9633741.96, 5782472.71]);
const proj21781 &#x3D; getProjection(&#x27;EPSG:21781&#x27;);
proj21781.setExtent([485071.54, 75346.36, 828515.78, 299941.84]);
const proj3413 &#x3D; getProjection(&#x27;EPSG:3413&#x27;);
proj3413.setExtent([-4194304, -4194304, 4194304, 4194304]);
const proj2163 &#x3D; getProjection(&#x27;EPSG:2163&#x27;);
proj2163.setExtent([-8040784.5135, -2577524.921, 3668901.4484, 4785105.1096]);
const proj54009 &#x3D; getProjection(&#x27;ESRI:54009&#x27;);
proj54009.setExtent([-18e6, -9e6, 18e6, 9e6]);
const layers &#x3D; {};
layers[&#x27;osm&#x27;] &#x3D; new TileLayer({
source: new OSM(),
});
layers[&#x27;wms4326&#x27;] &#x3D; new TileLayer({
source: new TileWMS({
url: &#x27;https://ahocevar.com/geoserver/wms&#x27;,
crossOrigin: &#x27;&#x27;,
params: {
&#x27;LAYERS&#x27;: &#x27;ne:NE1_HR_LC_SR_W_DR&#x27;,
&#x27;TILED&#x27;: true,
},
projection: &#x27;EPSG:4326&#x27;,
}),
});
layers[&#x27;wms21781&#x27;] &#x3D; new TileLayer({
source: new TileWMS({
attributions:
&#x27;© &lt;a href&#x3D;&quot;https://shop.swisstopo.admin.ch/en/products/maps/national/lk1000&quot;&#x27; +
&#x27;target&#x3D;&quot;_blank&quot;&gt;Pixelmap 1:1000000 / geo.admin.ch&lt;/a&gt;&#x27;,
crossOrigin: &#x27;anonymous&#x27;,
params: {
&#x27;LAYERS&#x27;: &#x27;ch.swisstopo.pixelkarte-farbe-pk1000.noscale&#x27;,
&#x27;FORMAT&#x27;: &#x27;image/jpeg&#x27;,
},
url: &#x27;https://wms.geo.admin.ch/&#x27;,
projection: &#x27;EPSG:21781&#x27;,
}),
});
const parser &#x3D; new WMTSCapabilities();
layers[&#x27;wmts3413&#x27;] &#x3D; new TileLayer();
const urlA &#x3D;
&#x27;https://map1.vis.earthdata.nasa.gov/wmts-arctic/&#x27; +
&#x27;wmts.cgi?SERVICE&#x3D;WMTS&amp;request&#x3D;GetCapabilities&#x27;;
fetch(urlA)
.then(function (response) {
return response.text();
})
.then(function (text) {
const result &#x3D; parser.read(text);
const options &#x3D; optionsFromCapabilities(result, {
layer: &#x27;OSM_Land_Mask&#x27;,
matrixSet: &#x27;EPSG3413_250m&#x27;,
});
options.crossOrigin &#x3D; &#x27;&#x27;;
options.projection &#x3D; &#x27;EPSG:3413&#x27;;
options.wrapX &#x3D; false;
layers[&#x27;wmts3413&#x27;].setSource(new WMTS(options));
});
layers[&#x27;bng&#x27;] &#x3D; new TileLayer();
const urlB &#x3D;
&#x27;https://tiles.arcgis.com/tiles/qHLhLQrcvEnxjtPr/arcgis/rest/services/OS_Open_Raster/MapServer/WMTS&#x27;;
fetch(urlB)
.then(function (response) {
return response.text();
})
.then(function (text) {
const result &#x3D; parser.read(text);
const options &#x3D; optionsFromCapabilities(result, {
layer: &#x27;OS_Open_Raster&#x27;,
});
options.attributions &#x3D;
&#x27;Contains OS data © Crown Copyright and database right &#x27; +
new Date().getFullYear();
options.crossOrigin &#x3D; &#x27;&#x27;;
options.projection &#x3D; &#x27;EPSG:27700&#x27;;
options.wrapX &#x3D; false;
layers[&#x27;bng&#x27;].setSource(new WMTS(options));
});
const startResolution &#x3D; getWidth(getProjection(&#x27;EPSG:3857&#x27;).getExtent()) / 256;
const resolutions &#x3D; new Array(22);
for (let i &#x3D; 0, ii &#x3D; resolutions.length; i &lt; ii; ++i) {
resolutions[i] &#x3D; startResolution / Math.pow(2, i);
}
layers[&#x27;states&#x27;] &#x3D; new TileLayer({
source: new TileWMS({
url: &#x27;https://ahocevar.com/geoserver/wms&#x27;,
crossOrigin: &#x27;&#x27;,
params: {&#x27;LAYERS&#x27;: &#x27;topp:states&#x27;},
serverType: &#x27;geoserver&#x27;,
tileGrid: new TileGrid({
extent: [-13884991, 2870341, -7455066, 6338219],
resolutions: resolutions,
tileSize: [512, 256],
}),
projection: &#x27;EPSG:3857&#x27;,
}),
});
const map &#x3D; new Map({
layers: [layers[&#x27;osm&#x27;], layers[&#x27;bng&#x27;]],
target: &#x27;map&#x27;,
view: new View({
projection: &#x27;EPSG:3857&#x27;,
center: [0, 0],
zoom: 2,
}),
});
const baseLayerSelect &#x3D; document.getElementById(&#x27;base-layer&#x27;);
const overlayLayerSelect &#x3D; document.getElementById(&#x27;overlay-layer&#x27;);
const viewProjSelect &#x3D; document.getElementById(&#x27;view-projection&#x27;);
const renderEdgesCheckbox &#x3D; document.getElementById(&#x27;render-edges&#x27;);
let renderEdges &#x3D; false;
function updateViewProjection() {
const newProj &#x3D; getProjection(viewProjSelect.value);
const newProjExtent &#x3D; newProj.getExtent();
const newView &#x3D; new View({
projection: newProj,
center: getCenter(newProjExtent || [0, 0, 0, 0]),
zoom: 0,
extent: newProjExtent || undefined,
});
map.setView(newView);
// Example how to prevent double occurrence of map by limiting layer extent
if (newProj.isGlobal()) {
layers[&#x27;bng&#x27;].setExtent(
transformExtent(proj27700.getExtent(), proj27700, newProj, 2)
);
} else {
layers[&#x27;bng&#x27;].setExtent(undefined);
}
}
/**
* Handle change event.
*/
viewProjSelect.onchange &#x3D; function () {
updateViewProjection();
};
updateViewProjection();
const updateRenderEdgesOnLayer &#x3D; function (layer) {
if (layer instanceof TileLayer) {
const source &#x3D; layer.getSource();
if (source instanceof TileImage) {
source.setRenderReprojectionEdges(renderEdges);
}
}
};
/**
* Handle change event.
*/
baseLayerSelect.onchange &#x3D; function () {
const layer &#x3D; layers[baseLayerSelect.value];
if (layer) {
layer.setOpacity(1);
updateRenderEdgesOnLayer(layer);
map.getLayers().setAt(0, layer);
}
};
/**
* Handle change event.
*/
overlayLayerSelect.onchange &#x3D; function () {
const layer &#x3D; layers[overlayLayerSelect.value];
if (layer) {
layer.setOpacity(0.7);
updateRenderEdgesOnLayer(layer);
map.getLayers().setAt(1, layer);
}
};
/**
* Handle change event.
*/
renderEdgesCheckbox.onchange &#x3D; function () {
renderEdges &#x3D; renderEdgesCheckbox.checked;
map.getLayers().forEach(function (layer) {
updateRenderEdgesOnLayer(layer);
});
};
</code></pre>
</div>
<div class="row-fluid">
<h5 class="source-heading">index.html</h5>
<pre><code id="example-html-source" class="language-markup">&lt;!DOCTYPE html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
&lt;meta charset="UTF-8"&gt;
&lt;title&gt;Raster Reprojection&lt;/title&gt;
&lt;!-- Pointer events polyfill for old browsers, see https://caniuse.com/#feat=pointer --&gt;
&lt;script src="https://unpkg.com/elm-pep"&gt;&lt;/script&gt;
&lt;!-- The lines below are only needed for old environments like Internet Explorer and Android 4.x --&gt;
&lt;script src="https://cdn.polyfill.io/v3/polyfill.min.js?features=fetch,requestAnimationFrame,Element.prototype.classList,TextDecoder"&gt;&lt;/script&gt;
&lt;script src="https://cdnjs.cloudflare.com/ajax/libs/core-js/3.18.3/minified.js"&gt;&lt;/script&gt;
&lt;style&gt;
.map {
width: 100%;
height:400px;
}
.form-inline label {
justify-content: left;
}
&lt;/style&gt;
&lt;/head&gt;
&lt;body&gt;
&lt;div id&#x3D;&quot;map&quot; class&#x3D;&quot;map&quot;&gt;&lt;/div&gt;
&lt;form class&#x3D;&quot;form-inline&quot;&gt;
&lt;div class&#x3D;&quot;col-md-3&quot;&gt;
&lt;label for&#x3D;&quot;base-layer&quot;&gt;Base map:&lt;/label&gt;
&lt;select id&#x3D;&quot;base-layer&quot;&gt;
&lt;option value&#x3D;&quot;osm&quot;&gt;OSM (EPSG:3857)&lt;/option&gt;
&lt;option value&#x3D;&quot;wms4326&quot;&gt;WMS (EPSG:4326)&lt;/option&gt;
&lt;/select&gt;
&lt;/div&gt;
&lt;div class&#x3D;&quot;col-md-4&quot;&gt;
&lt;label for&#x3D;&quot;overlay-layer&quot;&gt;Overlay map:&lt;/label&gt;
&lt;select id&#x3D;&quot;overlay-layer&quot;&gt;
&lt;option value&#x3D;&quot;bng&quot;&gt;British National Grid (EPSG:27700)&lt;/option&gt;
&lt;option value&#x3D;&quot;wms21781&quot;&gt;Swisstopo WMS (EPSG:21781)&lt;/option&gt;
&lt;option value&#x3D;&quot;wmts3413&quot;&gt;NASA Arctic WMTS (EPSG:3413)&lt;/option&gt;
&lt;option value&#x3D;&quot;states&quot;&gt;United States (EPSG:3857)&lt;/option&gt;
&lt;/select&gt;
&lt;/div&gt;
&lt;div class&#x3D;&quot;col-md-5&quot;&gt;
&lt;label for&#x3D;&quot;view-projection&quot;&gt;View projection:&lt;/label&gt;
&lt;select id&#x3D;&quot;view-projection&quot;&gt;
&lt;option value&#x3D;&quot;EPSG:3857&quot;&gt;Spherical Mercator (EPSG:3857)&lt;/option&gt;
&lt;option value&#x3D;&quot;EPSG:4326&quot;&gt;WGS 84 (EPSG:4326)&lt;/option&gt;
&lt;option value&#x3D;&quot;ESRI:54009&quot;&gt;Mollweide (ESRI:54009)&lt;/option&gt;
&lt;option value&#x3D;&quot;EPSG:27700&quot;&gt;British National Grid (EPSG:27700)&lt;/option&gt;
&lt;option value&#x3D;&quot;EPSG:23032&quot;&gt;ED50 / UTM zone 32N (EPSG:23032)&lt;/option&gt;
&lt;option value&#x3D;&quot;EPSG:2163&quot;&gt;US National Atlas Equal Area (EPSG:2163)&lt;/option&gt;
&lt;option value&#x3D;&quot;EPSG:3413&quot;&gt;NSIDC Polar Stereographic North (EPSG:3413)&lt;/option&gt;
&lt;option value&#x3D;&quot;EPSG:5479&quot;&gt;RSRGD2000 / MSLC2000 (EPSG:5479)&lt;/option&gt;
&lt;/select&gt;
&lt;/div&gt;
&lt;/form&gt;
&lt;form class&#x3D;&quot;form-inline&quot;&gt;
&lt;div class&#x3D;&quot;col-md-auto&quot;&gt;
&lt;label&gt;
Render reprojection edges:&amp;nbsp;
&lt;input type&#x3D;&quot;checkbox&quot; id&#x3D;&quot;render-edges&quot; /&gt;
&lt;/label&gt;
&lt;/div&gt;
&lt;/form&gt;
&lt;script src="main.js"&gt;&lt;/script&gt;
&lt;/body&gt;
&lt;/html&gt;</code></pre>
</div>
<div class="row-fluid">
<h5 class="source-heading">package.json</h5>
<pre><code id="example-pkg-source" class="language-json">{
&quot;name&quot;: &quot;reprojection&quot;,
&quot;dependencies&quot;: {
&quot;ol&quot;: &quot;6.12.0&quot;,
&quot;proj4&quot;: &quot;^2.7.5&quot;
},
&quot;devDependencies&quot;: {
&quot;parcel&quot;: &quot;^2.0.0&quot;
},
&quot;scripts&quot;: {
&quot;start&quot;: &quot;parcel index.html&quot;,
&quot;build&quot;: &quot;parcel build --public-url . index.html&quot;
}
}</code></pre>
</div>
</div>
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.bundle.min.js"></script>
<script src="./resources/prism/prism-1.20.0.min.js"></script>
<script src="./resources/common.js"></script>
<script src="common.js"></script>
<script src="reprojection.js"></script>
<script>
$('#tag-example-list').on('show.bs.modal', function (event) {
const button = $(event.relatedTarget); // Button that triggered the modal
const title = button.data('title');
const content = button.data('content');
const modal = $(this)
modal.find('.modal-title').text(title);
modal.find('.modal-body').html(content);
});
var packageUrl = 'https://raw.githubusercontent.com/openlayers/openlayers.github.io/build/package.json';
fetch(packageUrl).then(function(response) {
return response.json();
}).then(function(json) {
var latestVersion = json.version;
document.getElementById('latest-version').innerHTML = latestVersion;
var url = window.location.href;
var branchSearch = url.match(/\/([^\/]*)\/examples\//);
var cookieText = 'dismissed=-' + latestVersion + '-';
var dismissed = document.cookie.indexOf(cookieText) != -1;
if (branchSearch && !dismissed && /^v[0-9\.]*$/.test(branchSearch[1]) && '6.12.0' != latestVersion) {
var link = url.replace(branchSearch[0], '/latest/examples/');
fetch(link, {method: 'head'}).then(function(response) {
var a = document.getElementById('latest-link');
a.href = response.status == 200 ? link : '../../latest/examples/';
});
var latestCheck = document.getElementById('latest-check');
latestCheck.style.display = '';
document.getElementById('latest-dismiss').onclick = function() {
latestCheck.style.display = 'none';
document.cookie = cookieText;
}
}
});
</script>
</body>
</html>