Google Maps integration

GeoWebCache can support Google Maps clients.

Please see the Google Maps API documentation on details on creating custom Google Maps demos. To integrate a layer served by GeoWebCache with Google Maps, you can use the following HTML code as a template. 

<!DOCTYPE html "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <meta http-equiv="content-type" content="text/html; charset=utf-8"/>
        <title>Google Maps with GeoWebCache</title>
        <script src='http://maps.google.com/maps?file=api&amp;v=2&amp;key=GOOGLE_MAPS_API_KEY'></script>
        <script type="text/javascript">

            function initialize() {  
                if (GBrowserIsCompatible()) {
                    var map = new GMap2(document.getElementById("map_canvas"));
                    map.setCenter(new GLatLng(39, -96), 4);
		
		    var tilelayer =  new GTileLayer(null, null, null, {
		        tileUrlTemplate: 'http://EXAMPLE.COM:PORT/GEOWEBCACHE_PATH/gmaps?layers=YOUR_LAYER&zoom={Z}&x={X}&y={Y}', 
                        isPng:true,
                        opacity:0.5 }
			);
                   
                    var myTileLayer = new GTileLayerOverlay(tilelayer);
		    map.addOverlay(myTileLayer);
      }
    }

        </script>
    </head>
    <body onload="initialize()" onunload="GUnload()">
        <div id="map_canvas" style="width: 500px; height: 300px"></div>
    </body>
</html>

A few notes on the above template:

1. 

<script src='http://maps.google.com/maps?file=api&amp;v=2&amp;key=GOOGLE_MAPS_API_KEY'></script>

Replace the string GOOGLE_MAPS_API_KEY with a valid Google Maps API key. Sign up for a key.

2. 

tileUrlTemplate: 'http://EXAMPLE.COM:PORT/GEOWEBCACHE_PATH/gmaps?layers=YOUR_LAYER&zoom={Z}&x={X}&y={Y}',

This line is where the URL containing the layer served by GeoWebCache is explicitly invoked. Change EXAMPLE.COM:PORT to your website and port number. Change GEOWEBCACHE_PATH to the path of your GeoWebCache instance (Examples: /geowebcache or /geoserver/gwc/service). Change YOUR_LAYER to the name of your layer (Example: topp:states)

For more information on syntax in this example, please see the Google Maps API documentation.