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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>OpenLayers Buffer Example</title>
<link rel="stylesheet" href="../theme/default/style.css" type="text/css" />
<link rel="stylesheet" href="style.css" type="text/css" />
<script src="../lib/OpenLayers.js"></script>
<script type="text/javascript">
var lon = 0;
var lat = 0;
var zoom = 2;
var map, layer;
function init(){
map = new OpenLayers.Map( 'map' );
layer = new OpenLayers.Layer.WMS( "0 buffer: OpenLayers WMS",
"http://labs.metacarta.com/wms/vmap0",
{layers: 'basic'}, {'buffer':0} );
map.addLayer(layer);
layer = new OpenLayers.Layer.WMS( "1 buffer: OpenLayers WMS",
"http://labs.metacarta.com/wms/vmap0",
{layers: 'basic'}, {'buffer':1} );
map.addLayer(layer);
layer = new OpenLayers.Layer.WMS( "4 buffer: OpenLayers WMS",
"http://labs.metacarta.com/wms/vmap0",
{layers: 'basic'}, {'buffer':4} );
map.addLayer(layer);
map.addControl(new OpenLayers.Control.LayerSwitcher())
map.setCenter(new OpenLayers.LonLat(lon, lat), zoom);
}
</script>
</head>
<body onload="init()">
<h1 id="title">Buffer Example</h1>
<div id="tags">
</div>
<p id="shortdesc">
This example shows the use of the buffer layer option for any layer that inherits from OpenLayers.Layer.Grid.
</p>
<div id="map" class="smallmap"></div>
<div id="docs">
Use the buffer property to control how many tiles are included
outside the visible map area. Default is 2.
</div>
</body>
</html>