This example shows a static heatmap overlay for google maps. Please feel free to improve the layer implementation on github.
<!DOCTYPE html>
<html lang="en">
...
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<div id="heatmapArea" />
<script type="text/javascript" src="heatmap.js"></script>
<script type="text/javascript" src="heatmap-gmaps.js"></script>
<script type="text/javascript">
window.onload = function(){
// standard gmaps initialization
var myLatlng = new google.maps.LatLng(48.3333, 16.35);
// define map properties
var myOptions = {
zoom: 3,
center: myLatlng,
mapTypeId: google.maps.MapTypeId.ROADMAP,
disableDefaultUI: false,
scrollwheel: true,
draggable: true,
navigationControl: true,
mapTypeControl: false,
scaleControl: true,
disableDoubleClickZoom: false
};
// we'll use the heatmapArea
var map = new google.maps.Map($("#heatmapArea")[0], myOptions);
// let's create a heatmap-overlay
// with heatmap config properties
var heatmap = new HeatmapOverlay(map, {
"radius":20,
"visible":true,
"opacity":60
});
// here is our dataset
// important: a datapoint now contains lat, lng and count property!
var testData={
max: 46,
data: [{lat: 33.5363, lng:-117.044, count: 1},{lat: 33.5608, lng:-117.24, count: 1},{lat: 38, lng:-97, count: 1},{lat: 38.9358, lng:-77.1621, count: 1}]
};
// now we can set the data
google.maps.event.addListenerOnce(map, "idle", function(){
// this is important, because if you set the data set too early, the latlng/pixel projection doesn't work
heatmap.setDataSet(testData);
});
};
</script>
</html>