Openlayer结合heatmap热力图的实现
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<title>heatmap.js OpenLayers Heatmap Layer</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
body, html {
margin:0;
padding:0;
font-family:Arial;
}
#heatmapArea {
position:relative;
float:left;
width:100%;
height:900px;
border:1px dashed black;
}
</style>
<link rel="shortcut icon" type="image/png" href="http://www.patrick-wied.at/img/favicon.png" />
</head>
<body onload="init()">
<div id="heatmapArea">
</div>
<script type="text/javascript" src="js/gis/lib/OpenLayers.js"></script>
<script type="text/javascript" src="js/gis/lib/Heatmap-Openlayers/heatmap.js"></script>
<script type="text/javascript" src="js/gis/lib/Heatmap-Openlayers/heatmap-openlayers.js"></script>
<script type="text/javascript">
var map, layer, heatmap;
function init(){
var testData={
max: 46,
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};
var transformedTestData = { max: testData.max , data: [] },
data = testData.data,
datalen = data.length,
nudata = [];
// in order to use the OpenLayers Heatmap Layer we have to transform our data into
// { max: <max>, data: [{lonlat: <OpenLayers.LonLat>, count: <count>},...]}
while(datalen--){
nudata.push({
lonlat: new OpenLayers.LonLat(data[datalen].lon, data[datalen].lat),
count: data[datalen].count
});
}
transformedTestData.data = nudata;
map = new OpenLayers.Map( 'heatmapArea');
layer = new OpenLayers.Layer.OSM();
// create our heatmap layer
heatmap = new OpenLayers.Layer.Heatmap( "Heatmap Layer", map, layer, {visible: true, radius:10}, {isBaseLayer: false, opacity: 0.3, projection: new OpenLayers.Projection("EPSG:4326")});
map.addLayers([layer, heatmap]);
map.zoomToMaxExtent();
map.zoomIn();
heatmap.setDataSet(transformedTestData);
}
</script>
</html>具体代码的例子在GitHub上：https://github.com/followwwind/gis
转载自：https://blog.csdn.net/GIS_BT/article/details/80452722
