Use of Layer.Grid.buffer

git-svn-id: http://svn.openlayers.org/trunk/openlayers@4275 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
2007-09-14 00:47:42 +00:00
parent 076af6590c
commit 217298f606
1 changed files with 41 additions and 0 deletions
@@ -0,0 +1,41 @@
 <html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <style type="text/css">
        #map {
            width: 694px;
            height: 464px;
            border: 1px solid black;
        }
    </style>
    <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()">
    <div id="map"></div>
    <p>Use the buffer property to control how many tiles are included
       outside the visible map area. Default is 2</p> 
  </body>
 </html>