mirror of
https://github.com/Viglino/ol-ext.git
synced 2025-12-08 19:26:29 +00:00
207 lines
6.4 KiB
HTML
207 lines
6.4 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<!--
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Copyright (c) 2015-2018 Jean-Marc VIGLINO,
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released under CeCILL-B (french BSD like) licence: http://www.cecill.info/
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-->
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<title>ol-ext: IDW layer</title>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1" />
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<link rel="icon" type="image/png" href="https://openlayers.org/assets/theme/img/logo70.png" />
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<meta name="description" content="IDW source for ol" />
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<meta name="keywords" content="ol, openlayers, layer, source, IDW, Inverse Distance Weighting" />
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<meta name="twitter:image" content="https://viglino.github.io/ol-ext/img/map.layer.idw.jpg" />
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<meta name="twitter:site" content="@viglino" />
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<meta name="twitter:card" content="summary" />
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<meta name="twitter:title" content="ol-ext: IDW source" />
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<meta name="twitter:description" content="An Inverse distance weighting (IDW) source for multivariate interpolation with a known scattered set of points on Openlayers maps." />
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<!-- jQuery -->
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<script type="text/javascript" src="https://code.jquery.com/jquery-1.11.0.min.js"></script>
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<!-- Openlayers -->
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<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/ol@latest/ol.css" />
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<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/ol@latest/dist/ol.js"></script>
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<script src="/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL,Object.assign"></script>
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<!-- ol-ext -->
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<link rel="stylesheet" href="../../dist/ol-ext.css" />
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<script type="text/javascript" src="../../dist/ol-ext.js"></script>
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<!-- Pointer events polyfill for old browsers, see https://caniuse.com/#feat=pointer -->
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<script src="https://unpkg.com/elm-pep"></script>
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<!-- filesaver-js -->
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<script type="text/javascript" src="https://cdn.rawgit.com/eligrey/FileSaver.js/aa9f4e0e/FileSaver.min.js"></script>
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<link rel="stylesheet" href="../style.css" />
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<style>
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#map {
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width: 600px;
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height: 400px;
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max-width: 100%;
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}
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.fullscreen #map {
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position: absolute;
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left: 0;
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top: 0;
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width: 100%;
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height: 100%;
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}
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.fullscreen .options {
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position: absolute;
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left: 50%;
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top: 0;
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transform: translateX(-50%);
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margin: 0;
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}
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.fullscreen .icss-github-corner {
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font-size: 1.5em;
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}
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</style>
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</head>
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<body >
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<a href="https://github.com/Viglino/ol-ext" class="icss-github-corner"><i></i></a>
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<a href="../../index.html">
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<h1>ol-ext: IDW layer</h1>
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</a>
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<div class="info">
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<p>
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<i>ol/source/IDW</i> is an Inverse Distance Weighting (IDW) interpolated source that use the
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<a href="https://en.wikipedia.org/wiki/Inverse_distance_weighting">Shepard's method</a>.
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<br/>
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The default weight convertion function converts values from 0 (blue) to 100 (red).
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You can use values up to 128 (magenta). Upper values turn around the color wheel.
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<br/>
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The <i>worker</i> option let you calculate the distance map in a worker.
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</p>
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<ul>
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</ul>
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</div>
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<!-- DIV pour la carte -->
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<div id="map"></div>
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<div class="options">
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Click on the map to add a new measure.
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<ul>
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<li>
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Value:
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<input id="value" type="number" value="50" min="0" max="100" />
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<label><input id="random" type="checkbox" checked="checked" /> random</label>
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</li>
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<li>
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Scale: <select onchange="idw.setScale(this.value)">
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<option valule="1">1</option>
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<option valule="2">2</option>
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<option valule="4" selected>4</option>
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<option valule="8">8</option>
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</select>
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</li>
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<li>
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Max distance: <input type="range" step="100000" min="0" max="4000000" value="0" onchange="idw.setMaxD(this.value)">
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</li>
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<li style="padding-top: 1em; float: right;">
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<button onclick="idw.getSource().clear()">clear</button>
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<button onclick="$('body').toggleClass('fullscreen'); map.updateSize()">FullScreen</button>
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</li>
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</ul>
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</div>
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<script type="text/javascript">
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// The map
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var map = new ol.Map ({
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target: 'map',
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view: new ol.View ({
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zoom: 3,
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center: [261204.43490751847, 6250258.191535994]
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}),
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layers: [ new ol.layer.Geoportail({ layer: 'GEOGRAPHICALGRIDSYSTEMS.PLANIGNV2' })]
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});
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map.addControl(new ol.control.LayerSwitcher());
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// IDW source
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var idw = new ol.source.IDW({
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/* Use workers * /
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useWorker: true,
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lib: {
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// A set of function accessible in the worker
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hue2rgb: function(h) {
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h = (h + 6) % 6;
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if (h < 1) return Math.round(h * 255);
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if (h < 3) return 255;
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if (h < 4) return Math.round((4 - h) * 255);
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return 0;
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}
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},
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getColor: function(v) {
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// Get hue
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var h = 4 - (0.04 * v);
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// Convert to RGB
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return [
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hue2rgb(h + 2),
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hue2rgb(h),
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hue2rgb(h - 2),
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255
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];
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},
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/**/
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// scale: 8,
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// maxD: 1000000,
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// Source that contains the data
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source: new ol.source.Vector(),
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// Use val as weight property
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weight: 'val'
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});
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map.addLayer (new ol.layer.Image({
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title: 'IDW',
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source: idw,
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opacity: .5
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}));
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map.addLayer(new ol.layer.Vector({
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title: 'source',
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source: idw.getSource(),
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style: function(f) {
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return new ol.style.Style({
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// image: new ol.style.Circle({ radius: 2, fill: new ol.style.Fill({ color: '#000' }) }),
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text: new ol.style.Text({
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text: f.get('val').toString(),
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stroke: new ol.style.Stroke({ color: [255,255,255,128], width: 1.25 }),
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})
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});
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}
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}))
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var draw = new ol.interaction.Draw({ type: 'Point', source: idw.getSource() });
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draw.on('drawend', function(e) {
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e.feature.set('val', parseInt($('#value').val()));
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if ($('#random').prop('checked')) $('#value').val(Math.round(Math.random()*100));
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})
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map.addInteraction(draw);
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// Add a set of features
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function addFeatures(size) {
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size = size || 100;
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var ext = map.getView().calculateExtent();
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var dx = ext[2]-ext[0];
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var dy = ext[3]-ext[1];
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var features = [];
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for (var i=0; i<size; ++i){
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var f = new ol.Feature(new ol.geom.Point([
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ext[0]+dx*Math.random(),
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ext[1]+dy*Math.random()
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]));
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f.set('val', Math.round(Math.random()*100));
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features.push(f);
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}
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idw.getSource().addFeatures(features)
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}
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</script>
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</body>
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</html> |