d4024846cf
To get this to compile with the examples, typecasts have to be added to Map renderer options.
82 lines
1.9 KiB
JavaScript
82 lines
1.9 KiB
JavaScript
goog.require('ol.Feature');
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goog.require('ol.Map');
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goog.require('ol.View');
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goog.require('ol.geom.Point');
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goog.require('ol.layer.Tile');
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goog.require('ol.layer.Vector');
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goog.require('ol.source.Cluster');
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goog.require('ol.source.OSM');
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goog.require('ol.source.Vector');
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goog.require('ol.style.Circle');
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goog.require('ol.style.Fill');
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goog.require('ol.style.Stroke');
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goog.require('ol.style.Style');
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goog.require('ol.style.Text');
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var distance = document.getElementById('distance');
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var count = 20000;
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var features = new Array(count);
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var e = 4500000;
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for (var i = 0; i < count; ++i) {
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var coordinates = [2 * e * Math.random() - e, 2 * e * Math.random() - e];
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features[i] = new ol.Feature(new ol.geom.Point(coordinates));
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}
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var source = new ol.source.Vector({
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features: features
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});
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var clusterSource = new ol.source.Cluster({
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distance: parseInt(distance.value, 10),
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source: source
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});
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var styleCache = {};
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var clusters = new ol.layer.Vector({
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source: clusterSource,
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style: function(feature) {
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var size = feature.get('features').length;
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var style = styleCache[size];
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if (!style) {
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style = new ol.style.Style({
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image: new ol.style.Circle({
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radius: 10,
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stroke: new ol.style.Stroke({
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color: '#fff'
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}),
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fill: new ol.style.Fill({
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color: '#3399CC'
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})
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}),
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text: new ol.style.Text({
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text: size.toString(),
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fill: new ol.style.Fill({
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color: '#fff'
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})
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})
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});
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styleCache[size] = style;
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}
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return style;
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}
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});
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var raster = new ol.layer.Tile({
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source: new ol.source.OSM()
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});
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var map = new ol.Map({
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layers: [raster, clusters],
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target: 'map',
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view: new ol.View({
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center: [0, 0],
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zoom: 2
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})
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});
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distance.addEventListener('input', function() {
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clusterSource.setDistance(parseInt(distance.value, 10));
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});
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