1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | <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> |