worldwind.html
1.86 KB
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
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<style type="text/css">
#map {
width: 800px;
height: 475px;
border: 1px solid black;
}
</style>
<script src="../lib/OpenLayers.js"></script>
<script type="text/javascript">
<!--
var ol_wms, ww, ww2;
function init(){
var map = new OpenLayers.Map('map', {'maxResolution': .28125, tileSize: new OpenLayers.Size(512, 512)});
ol_wms = new OpenLayers.Layer.WMS( "OpenLayers WMS",
"http://labs.metacarta.com/wms/vmap0?", {layers: 'basic'} );
ww = new OpenLayers.Layer.WorldWind( "Bathy",
"http://worldwind25.arc.nasa.gov/tile/tile.aspx?", 36, 4,
{T:"bmng.topo.bathy.200406"});
ww2 = new OpenLayers.Layer.WorldWind( "LANDSAT",
"http://worldwind25.arc.nasa.gov/tile/tile.aspx", 2.25, 4,
{T:"105"});
map.addLayers([ol_wms, ww, ww2]);
map.addControl(new OpenLayers.Control.LayerSwitcher());
map.setCenter(new OpenLayers.LonLat(-71.4, 42.3), 6);
}
// -->
</script>
</head>
<body onload="init()">
<h1>OpenLayers Example</h1>
<div id="map"></div>
<p>This is a demonstration of using Tiled WorldWind layers. WorldWind requires you to define a "LZTD" -- the 3rd param of the constructor -- and the number of zoom levels it supports. When a worldwind layer is not visible at a given tile level, and empty tile is placed there instead. Note that the maxResolution of the map times 512px, must be a multiple of a power of two different from the LZTD -- in this case, .28125 * 512 is 144, which is 36*4, and 2.25*64.</p>
<p>This example has a 'Bathy' layer, visible as you zoom out, and a 'landsat' layer, visible as you zoom in, both visible at zoom level 6.</p>
</body>
</html>