adding ArcGIS (AGS) Tile Cache Layer, great contribution from Azavea, thanks, p=dmiddlecamp, r=me (closes #3030)
git-svn-id: http://svn.openlayers.org/trunk/openlayers@11693 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
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bartvde
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>ArcGIS Server Map Cache Example (Direct Access)</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/OpenLayers.js" type="text/javascript"></script>
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<script src="../lib/OpenLayers/Layer/ArcGISCache.js" type="text/javascript"></script>
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<script type="text/javascript">
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/* First 4 variables extracted from conf.xml file */
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/* Tile layers & map MUST have same projection */
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var proj='EPSG:26915';
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/* Layer can also accept serverResolutions array
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* to deal with situation in which layer resolution array & map resolution
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* array are out of sync*/
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var mapResolutions = [33.0729828126323,16.9333672000677,8.46668360003387,4.23334180001693,2.11667090000847,1.05833545000423];
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/* For this example this next line is not really needed, 256x256 is default.
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* However, you would need to change this if your layer had different tile sizes */
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var tileSize = new OpenLayers.Size(256,256);
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/* Tile Origin is required unless it is the same as the implicit map origin
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* which can be affected by several variables including maxExtent for map or base layer */
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var agsTileOrigin = new OpenLayers.LonLat(-5120900,9998100);
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/* This can really be any valid bounds that the map would reasonably be within */
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/* var mapExtent = new OpenLayers.Bounds(293449.454286,4307691.661132,314827.830376,4323381.484178); */
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var mapExtent = new OpenLayers.Bounds(289310.8204,4300021.937,314710.8712,4325421.988);
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var aerialsUrl = 'http://serverx.esri.com/arcgiscache/dgaerials/Layers/_alllayers';
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var roadsUrl = 'http://serverx.esri.com/arcgiscache/DG_County_roads_yesA_backgroundDark/Layers/_alllayers';
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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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maxExtent:mapExtent,
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controls: [
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new OpenLayers.Control.Navigation(),
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new OpenLayers.Control.LayerSwitcher(),
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new OpenLayers.Control.PanZoomBar(),
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new OpenLayers.Control.MousePosition()]
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});
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var baseLayer = new OpenLayers.Layer.ArcGISCache('Aerials', aerialsUrl, {
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tileOrigin: agsTileOrigin,
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resolutions: mapResolutions,
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sphericalMercator: true,
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maxExtent: mapExtent,
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useArcGISServer: false,
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isBaseLayer: true,
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type: 'jpg',
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projection: proj
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});
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var overlayLayer = new OpenLayers.Layer.ArcGISCache('Roads', roadsUrl, {
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tileOrigin: agsTileOrigin,
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resolutions: mapResolutions,
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sphericalMercator: true,
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maxExtent: mapExtent,
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useArcGISServer: false,
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isBaseLayer: false,
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projection: proj
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});
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map.addLayers([baseLayer, overlayLayer]);
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//map.zoomToExtent(new OpenLayers.Bounds(295892.34, 4308521.69, 312825.71, 4316988.37));
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map.zoomToExtent(new OpenLayers.Bounds(-8341644, 4711236, -8339198, 4712459));
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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">ArcGIS Server Map Cache Example (Direct Access)</h1>
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<div id="tags">
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</div>
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<p id="shortdesc">
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Demonstrates the basic initialization of the ArcGIS Cache layer using a prebuilt configuration, and direct tile access from a file store.
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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>This example demonstrates using the ArcGISCache layer for
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accessing ESRI's ArcGIS Server (AGS) Map Cache tiles directly
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via the folder structure and HTTP. Toggle the visibility of the AGS layer to
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demonstrate how the two maps are lined up correctly.</p>
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<h2>Notes on this Layer</h2>
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<p>It's important that you set the correct values in your layer, and these
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values will differ between tile sets. You can find these values for your
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layer in conf.xml at the root of your cache.
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(ie. <a href="http://serverx.esri.com/arcgiscache/dgaerials/Layers/conf.xml">http://serverx.esri.com/arcgiscache/dgaerials/Layers/conf.xml</a>)</p>
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<p>For fused map caches this is often http:<i>ServerName</i>/arcgiscache/<i>MapServiceName</i>/Layers <br />
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For individual layer caches this is often http:<i>ServerName</i>/arcgiscache/<i>LayerName</i>/Layers </p>
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<h2> Other Examples </h2>
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<p>This is one of three examples for this layer. You can also configure this
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layer to use <a href="arcgiscache_ags.html">prebuilt tiles from a live server.</a> It is also
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possible to let this <a href="arcgiscache_jsonp.html">layer 'auto-configure' itself using the capabilities json object from the server itself when using a live ArcGIS server.</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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