stoqs/static/OpenLayers-2.11/examples/wms-untiled.html

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        var lon = 5;
        var lat = 40;
        var zoom = 5;
        var map, layer;

        function init(){
            map = new OpenLayers.Map( 'map' );
            layer = new OpenLayers.Layer.WMS(
                "OpenLayers WMS",
                "http://vmap0.tiles.osgeo.org/wms/vmap0",
                {layers: 'basic'},
                {singleTile: true}
            );
            map.addLayer(layer);

            map.setCenter(new OpenLayers.LonLat(lon, lat), zoom);
            map.addControl( new OpenLayers.Control.LayerSwitcher() );
        }
    </script>
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  <body onload="init()">
    <h1 id="title"> WMS Untiled Example</h1>

    <div id="tags">
        singletile, tile
    </div>
        <p id="shortdesc">
            Shows an example of an "untiled" WMS layer, which requests a single
            image for the entire map view.
        </p>
    <div id="map" class="smallmap"></div>
        <div id="docs">
            An untiled layer will only request a single image at a time.
            This is equivalent to using the deprecated
            OpenLayers.Layer.WMS.Untiled class, which will be removed at 3.0.
        </div>
  </body>
</html>