ArcGIS Flex API读取MapABC中的map

ArcGIS Flex API读取MapABC中的地图
效果如下：



MapABCTileMapServiceLayer.as

package com.esri.arcgis.flex.sample
{
	import com.esri.ags.SpatialReference;
	import com.esri.ags.geometry.Extent;
	import com.esri.ags.geometry.MapPoint;
	import com.esri.ags.layers.TiledMapServiceLayer;
	import com.esri.ags.layers.supportClasses.LOD;
	import com.esri.ags.layers.supportClasses.TileInfo;	
	import flash.net.URLRequest;
	
	public class MapABCTileMapServiceLayer extends TiledMapServiceLayer
	{
		//成员变量
		private var _tileInfo:TileInfo = new TileInfo(); // see buildTileInfo()
		
		
		public function MapABCTileMapServiceLayer()
		{
			super();
			
			buildTileInfo(); // to create our hardcoded tileInfo
			
			setLoaded(true); // Map will only use loaded layers
		}
		
		//----------------------------------
		//  全屏范围
		//  - required to calculate the tiles to use
		//----------------------------------
		override public function get fullExtent():Extent
		{
			return new Extent(-20037508.342787, -20037508.342787, 20037508.342787, 20037508.342787, new SpatialReference(102113));
		}
		
		//----------------------------------
		//  初始化范围
		//  - needed if Map doesn't have an extent
		//----------------------------------
		
		override public function get initialExtent():Extent
		{
			return new Extent(-20037508.342787, -20037508.342787, 20037508.342787, 20037508.342787, new SpatialReference(102113));
		}
		
		//----------------------------------
		//  空间参考系
		//  - needed if Map doesn't have a spatialReference
		//----------------------------------
		override public function get spatialReference():SpatialReference
		{
			return new SpatialReference(102113);
		}
		
		//----------------------------------
		//  tileInfo
		//----------------------------------
		override public function get tileInfo():TileInfo
		{
			return _tileInfo;
		}
		
		//----------------------------------
		//  units
		//  - needed if Map doesn't have it set
		//----------------------------------
		/*
		override public function get units():String
		{
		return "esriDecimalDegrees";
		}//*/
		
		//--------------------------------------
		//
		//  关键方法，用于读取服务器上的缓存图片
		//      getTileURL(level:Number, row:Number, col:Number):URLRequest
		//
		//--------------------------------------
		override protected function getTileURL(level:Number, row:Number, col:Number):URLRequest
		{
			//col%4是让其生成随机的0-3之间的数，缓存在0-3上都有相同的备份
			// http://emap0.mapabc.com/mapabc/maptile?v=w2.61&x=845&y=387&z=10
			
			var url:String = "http://emap"+(col%4)+".mapabc.com/mapabc/maptile?v=w2.61&&"+
				"x=" + col + "&" +
				"y=" + row + "&" +
				"z=" + level;
			
			return new URLRequest(url);
		}
		
		//--------------------------------------
		//
		//  自定义方法，定义地图缩放等级
		//
		//--------------------------------------
		private function buildTileInfo():void
		{
			_tileInfo.height=256;
			_tileInfo.width=256;
			_tileInfo.origin=new MapPoint(-20037508.342787, 20037508.342787);
			_tileInfo.spatialReference=new SpatialReference(102113);
			_tileInfo.lods = [
				new LOD(0, 156543.033928, 591657527.591555), 
				new LOD(1, 78271.5169639999, 295828763.795777), 
				new LOD(2, 39135.7584820001, 147914381.897889), 
				new LOD(3, 19567.8792409999, 73957190.948944), 
				new LOD(4, 9783.93962049996, 36978595.474472), 
				new LOD(5, 4891.96981024998, 18489297.737236), 
				new LOD(6, 2445.98490512499, 9244648.868618), 
				new LOD(7, 1222.99245256249, 4622324.434309), 
				new LOD(8, 611.49622628138, 2311162.217155), 
				new LOD(9, 305.748113140558, 1155581.108577), 
				new LOD(10, 152.874056570411, 577790.554289), 
				new LOD(11, 76.4370282850732, 288895.277144), 
				new LOD(12, 38.2185141425366, 144447.638572), 
				new LOD(13, 19.1092570712683, 72223.819286), 
				new LOD(14, 9.55462853563415, 36111.909643), 
				new LOD(15, 4.77731426794937, 18055.954822),
				new LOD(16, 2.38865713397468, 9027.977411), 
				new LOD(17, 1.19432856685505, 4513.988705), 
				new LOD(18, 0.597164283559817, 2256.994353),
				new LOD(19, 0.298582141647617, 1128.497176)
			];
		}
	}
}

ArcGISMapABCMap.mxml

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
			   xmlns:s="library://ns.adobe.com/flex/spark" 
			   xmlns:mx="library://ns.adobe.com/flex/mx"
			   xmlns:mapabc="com.esri.arcgis.flex.sample.*" 
			   xmlns:esri="http://www.esri.com/2008/ags">
	<esri:Map>
		<mapabc:MapABCTileMapServiceLayer id="googleMap" />
	</esri:Map>
</s:Application>