73 lines
2.6 KiB
HTML
73 lines
2.6 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
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<meta name="apple-mobile-web-app-capable" content="yes">
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<title>OpenLayers Client Zoom Example</title>
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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/Firebug/firebug.js"></script>
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<script src="../lib/OpenLayers.js"></script>
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<script src="clientzoom.js"></script>
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<style>
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.olControlAttribution {
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bottom: 5px;
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}
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#map {
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width: 600px;
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height: 400px;
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}
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</style>
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</head>
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<body onload="init();">
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<h1 id="title">Client Zoom</h1>
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<div id="tags">
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client zoom continuous zooming
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</div>
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<p id="shortdesc">
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This example demonstrates the <strong>"client zoom"</strong>
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functionality, where OpenLayers stretches the layer div when the
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resolution is not supported by that layer's tile service.
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</p>
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<div id="map"></div>
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<div id="docs">
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<p>
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The map of this example is configured with 22 resolutions, while
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the OSM tile server supports the first 19 resolutions only. When
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the zoom level is 19, 20 or 21 "client zoom" is applied to the OSM
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layer, i.e. the OSM layer div is stretched as necessary. The map's
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initial zoom is 18. So if you zoom in using the zoom bar's "+"
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button you'll effectively trigger "client zoom".
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</p>
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<p>
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For demonstration purpose the map of this example has
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<code>fractionalZoom</code> set to true. So "client zoom" also
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applies if you choose arbitrary zoom levels using the slider of the
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zoom bar, or shift-drag boxes to zoom to arbitrary extents.
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"client zoom" therefore allows continous zooming for tiled layers.
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</p>
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<p>
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Enabling "client zoom" on a layer is done by passing
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<code>serverResolutions</code> to the layer constructor.
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<code>serverResolutions</code> is the list of resolutions supported
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by the tile service. See the <a href="clientzoom.js"
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target="_blank"> clientzoom.js source</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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