image-layer.html
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<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/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);
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>