c350fd6810
git-svn-id: http://svn.openlayers.org/trunk/openlayers@7095 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
77 lines
2.7 KiB
HTML
77 lines
2.7 KiB
HTML
<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<link rel="stylesheet" href="../theme/default/style.css" type="text/css" />
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<link rel="stylesheet" href="style.css" type="text/css" />
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<script src="../lib/OpenLayers.js"></script>
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<script type="text/javascript">
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var lon = 50;
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var lat = 0;
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var zoom = 0;
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var map, layer;
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function init(){
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OpenLayers.DOTS_PER_INCH = 72;
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var options = {
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// various ways of specifying similar things
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// resolutions: [1.40625,0.703125,0.3515625,0.17578125,0.087890625,0.0439453125,0.02197265625,0.010986328125,0.0054931640625,0.00274658203125,0.00137329101],
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// scales: [50000000, 10000000],
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// maxResolution: 0.17578125,
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// minResolution: 0.0439453125,
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// maxScale: 10000000,
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// minScale: 50000000,
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// numZoomLevels: 5,
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// units: "dd",
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minResolution: "auto",
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minExtent: new OpenLayers.Bounds(-1, -1, 1, 1),
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maxResolution: "auto",
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maxExtent: new OpenLayers.Bounds(-180, -90, 180, 90)
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};
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map = new OpenLayers.Map( 'map' , options);
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layer = new OpenLayers.Layer.WMS( "OpenLayers WMS",
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"http://labs.metacarta.com/wms/vmap0", {layers: 'basic'});
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map.addLayer(layer);
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map.setCenter(new OpenLayers.LonLat(lon, lat), zoom);
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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 id="title">Zoom Level</h1>
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<div id="tags">
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</div>
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<p id="shortdesc">
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This example shows the use of the resolutions layer option on a number of layer types.
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</p>
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<div id="map" class="smallmap"></div>
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<div id="docs">
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<p>
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Set the extent of the viewable map using preset levels of scale available
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to the user via the zoom slider bar. You can set the minimum, maximum
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scales or resolutions, the number of levels in between and the minimum
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and maximum geographic extents in your map's units.
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</p>
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<p>
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Default units for Scale are in inches. Resolution is specified in map units
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per pixel where the default map units are decimal degrees(dd).<br/>
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scale = resolution * OpenLayers.INCHES_PER_UNIT[units] *
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OpenLayers.DOTS_PER_INCH <br/>
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You can either set the scale or the resolution, there is no need to set both.
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</p>
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<p>
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You can do it with a ...
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</p>
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</div>
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</body>
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</html>
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