ArcGIS Server Flex API接入MapABC地图

ArcGIS Server Flex API接入MapABC地图

（本实例只是个人兴趣研究，如果想要应用到商业用途，请联系相关厂家）

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MapABC的地图服务加载到ArcGIS Server中，需要重写ArcGIS Server Flex API中的TiledMapServiceLayer类。

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代码实现：

packagecom.esri.viewer.components.common.mapABC

{

importcom.esri.ags.SpatialReference;

import com.esri.ags.geometry.Extent;

importcom.esri.ags.geometry.MapPoint;

importcom.esri.ags.layers.TiledMapServiceLayer;

importcom.esri.ags.layers.supportClasses.LOD;

importcom.esri.ags.layers.supportClasses.TileInfo;

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importflash.net.URLRequest;

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public classMapABCTileMapServiceLayer extends TiledMapServiceLayer

{

//成员变量

private var_tileInfo:TileInfo = new TileInfo(); // see buildTileInfo()

private var_wkid:int = 102113;

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public functionMapABCTileMapServiceLayer()

{

super();

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buildTileInfo();// to create our hardcoded tileInfo

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setLoaded(true);// Map will only use loaded layers

}

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//———————————-

// 全屏范围

// – required tocalculate the tiles to use

//———————————-

override publicfunction get fullExtent():Extent

{

return newExtent(-20037508.342787,-20037508.342787,20037508.342787,new SpatialReference(_wkid));

}

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//———————————-

// 初始化范围

// – needed ifMap doesn”t have an extent

//———————————-

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override publicfunction get initialExtent():Extent

{

return newExtent(-20037508.342787,new SpatialReference(_wkid));

}

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//———————————-

// 空间参考系

// – needed ifMap doesn”t have a spatialReference

//———————————-

override publicfunction get spatialReference():SpatialReference

{

return newSpatialReference(_wkid);

}

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//———————————-

// tileInfo

//———————————-

override publicfunction get tileInfo():TileInfo

{

return_tileInfo;

}

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//———————————-

// units

// – needed ifMap doesn”t have it set

//———————————-

/*

override publicfunction get units():String

{

return“esriDecimalDegrees”;

}//*/

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//————————————————————————–

//

// 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

//

//————————————————————————–

overrideprotected function getTileURL(level:Number,col:Number):URLRequest

{

var url:String =“http://emap”+(col%4)+”.mapabc.com/mapabc/maptile?v=w2.61&&”+

“x=” + col +“&” +

“y=” + row +“&” +

“z=” + level;

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return newURLRequest(url);

}

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//————————————————————————–

//

// 自定义方法，定义地图缩放等级

//

//————————————————————————–

private functionbuildTileInfo():void

{

_tileInfo.height=256;

_tileInfo.width=256;

_tileInfo.origin=newMapPoint(-20037508.342787,20037508.342787);

_tileInfo.spatialReference=newSpatialReference(_wkid);

_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)

];

}

}

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}

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实现效果