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 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 | <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>OpenLayers Image Layer Example</title> <link rel="stylesheet" href="../theme/default/style.css" type="text/css" /> <link rel="stylesheet" href="style.css" type="text/css" /> <style type="text/css"> p.caption { width: 512px; } </style> <script src="../lib/Firebug/firebug.js"></script> <script src="../lib/OpenLayers.js"></script> <script type="text/javascript"> var map; function init(){ map = new OpenLayers.Map('map'); var options = {numZoomLevels: 3}; var graphic = new OpenLayers.Layer.Image( 'City Lights', 'http://earthtrends.wri.org/images/maps/4_m_citylights_lg.gif', new OpenLayers.Bounds(-180, -88.759, 180, 88.759), new OpenLayers.Size(580, 288), options ); graphic.events.on({ loadstart: function() { OpenLayers.Console.log("loadstart"); }, loadend: function() { OpenLayers.Console.log("loadend"); } }); var jpl_wms = new OpenLayers.Layer.WMS( "NASA Global Mosaic", "http://t1.hypercube.telascience.org/cgi-bin/landsat7", {layers: "landsat7"}, options); map.addLayers([graphic, jpl_wms]); map.addControl(new OpenLayers.Control.LayerSwitcher()); map.zoomToMaxExtent(); } </script> </head> <body onload="init()"> <h1 id="title">Image Layer Example</h1> <div id="tags"></div> <p id="shortdesc"> Demonstrate a single non-tiled image as a selectable base layer. </p> <div id="map" class="smallmap"></div> <div id="docs"> <p class="caption"> The "City Lights" layer above is created from a single web accessible image. If you construct it without any resolution related options, the layer will be given a single resolution based on the extent/size. Otherwise, it behaves much like a regular layer. This is primarily intended to be used in an overview map - where another layer type might not make a good overview. </p> </div> </body> </html> |