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<html xmlns="http://www.w3.org/1999/xhtml"> |
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<head> |
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<style type="text/css"> |
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p { |
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width: 512px; |
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} |
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#map { |
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width: 512px; |
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height: 256px; |
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border: 1px solid gray; |
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} |
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</style> |
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<script src="../lib/OpenLayers.js"></script> |
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<script type="text/javascript"> |
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var map; |
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function init(){ |
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map = new OpenLayers.Map('map'); |
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|
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var options = {numZoomLevels: 3}; |
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|
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var graphic = new OpenLayers.Layer.Image( |
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'City Lights', |
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'http://earthtrends.wri.org/images/maps/4_m_citylights_lg.gif', |
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new OpenLayers.Bounds(-180, -88.759, 180, 88.759), |
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new OpenLayers.Size(580, 288), |
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options); |
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|
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var jpl_wms = new OpenLayers.Layer.WMS( "NASA Global Mosaic", |
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"http://wms.jpl.nasa.gov/wms.cgi", |
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{layers: "modis,global_mosaic"}, options); |
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|
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map.addLayers([graphic, jpl_wms]); |
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map.addControl(new OpenLayers.Control.LayerSwitcher()); |
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map.zoomToMaxExtent(); |
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} |
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</script> |
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</head> |
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<body onload="init()"> |
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<h1>OpenLayers Image Layer Example</h1> |
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<div id="map"></div> |
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<p> |
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The "City Lights" layer above is created from a single web accessible |
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image. If you construct it without any resolution related options, |
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the layer will be given a single resolution based on the extent/size. |
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Otherwise, it behaves much like a regular layer. This is primarily |
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intended to be used in an overview map - where another layer type |
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might not make a good overview. |
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</p> |
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</body> |
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</html> |
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