擴展TiledMapServiceLayer agslib 是免費的可以進行擴張，加載天地圖、google地圖，geoserver wmts服務。
1．重載TiledMapServiceLayer接口類實現geoserver wmts瓦片地圖的加載
package com.components
{
import com.esri.ags.SpatialReference;
import com.esri.ags.Units;
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;
import mx.collections.ArrayCollection;
import mx.controls.Alert;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
import mx.rpc.http.HTTPService;
/**
* WMTSLayer
*/
public class WMTSLayer extends TiledMapServiceLayer
{
public var gridset:String = "";
public var layer:String = "";
public var _baseURL:String = "http://192.168.1.1:8083/geoserver/gwc/service/wmts";
public var xmin:Number = 122.85820097944764;
public var ymin:Number = 34.41033139891784;
public var xmax:Number = 149.85820097944764;
public var ymax:Number = 48.41033139891784;
public var _tileInfo:TileInfo = new TileInfo();
public function WMTSLayer()
{
super();
buildTileInfo();
setLoaded(true); // Map will only use loaded layers
}
private var _fullExtent:Extent = new Extent(
147.85820097944764,34.41033139891784,149.85820097944764,48.41033139891784,
new SpatialReference(4326));
/**
* @private
*/
override public function get fullExtent():Extent
{
return _fullExtent;
}
private var _initialExtent:Extent = new Extent(
122.85820097944764,34.41033139891784,149.85820097944764,48.41033139891784,
new SpatialReference(4326));
/**
* @private
*/
override public function get initialExtent():Extent
{
return _initialExtent;
}
private var _spatialReference:SpatialReference = new SpatialReference(4326);
override public function get spatialReference():SpatialReference
{
return _spatialReference;
}
/**
* @private
*/
override public function get tileInfo():TileInfo
{
return _tileInfo;
}
override public function get units():String
{
return Units.DECIMAL_DEGREES;
}
override protected function getTileURL(level:Number, row:Number, col:Number):URLRequest
{
var url:String = _baseURL
+ "?SERVICE=WMTS&VERSION=1.0.0&REQUEST=GetTile" + "&LAYER=mywork:mygroup" + "&STYLE=null" + "&FORMAT=image/jpeg" + "&TILEMATRIXSET=myGridset"
+ "&TILEMATRIX=myGridset:" + level
+ "&TILEROW=" + row
+ "&TILECOL=" + col ;
return new URLRequest(url);
}
public function buildTileInfo():void
{
_tileInfo.dpi = 96;
_tileInfo.spatialReference = new SpatialReference(4326);
_tileInfo.height = 256;
_tileInfo.width = 256;
_tileInfo.format = "image/jpeg";
_tileInfo.origin = new MapPoint(117.85820097944764,38.41033139891784);// map origin = new MapPoint(xmin,ymax)
_tileInfo.lods=
[
//通過設置geoserver 的gridset 可以獲取 根據bounds生成
new LOD(0,0.0078125,3106012.5779373213),
new LOD(1,0.00390625,1553006.2889686606),
new LOD(2,0.001953125,776503.1444843303),
new LOD(3,0.0009765625,388251.57224216516),
new LOD(4,0.00048828125,194125.78612108258),
new LOD(5,0.000244140625,97062.89306054129),
new LOD(6,0.0001220703125,48531.446530270645),
new LOD(7,0.00006103515625,24265.723265135322),
new LOD(8,0.000030517578125,12132.861632567661),
new LOD(9,0.0000152587890625,6066.430816283831),
new LOD(10,0.0000076293945312,3033.2154081220365),
new LOD(11,0.0000038146972656,1516.6077040610182),
new LOD(12,0.0000019073486328,758.3038520305091),
new LOD(13,0.0000009536743164,379.15192601525456)
//中國地圖
// new LOD(0,0.02197265625,8735660.375448715),
// new LOD(1,0.010986328125,4367830.1877243575),
// new LOD(2,0.0054931640625,2183915.0938621787),
// new LOD(3,0.00274658203125,1091957.5469310894),
// new LOD(4,0.001373291015625,545978.7734655447),
// new LOD(5,0.0006866455078125,272989.38673277234),
// new LOD(6,0.0003433227539062,136494.69336638617),
// new LOD(7,0.0001716613769531,68247.34668319309),
// new LOD(8,0.0000858306884766,34123.67334159654),
// new LOD(9,0.0000429153442383,17061.83667079827),
// new LOD(10,0.0000214576721191,8530.918335399136),
// new LOD(11,0.0000107288360596,4265.459167699568),
// new LOD(12,0.0000053644180298,2132.729583849784),
// new LOD(13,0.0000026822090149,1066.364791924892)
];
}
}
}
2．重載TiledMapServiceLayer接口類實現google地圖的加載
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;
//擴展TiledMapServiceLayer圖層實現加載google地圖
public class GoogleMapLayer extends TiledMapServiceLayer
{
private var _tileInfo:TileInfo=new TileInfo();
private var _baseURL:String="";
public var mapStyle:String="";
public function GoogleMapLayer()
{
super();
buildTileInfo();
setLoaded(true);
}
override public function get fullExtent():Extent
{
return new Extent(-20037508.342787, -20037508.342787, 20037508.342787, 20037508.342787, new SpatialReference(102113));
}
override public function get initialExtent():Extent
{
return new Extent(-20037508.342787, -20037508.342787, 20037508.342787, 20037508.342787, new SpatialReference(102113));
}
override public function get spatialReference():SpatialReference
{
return new SpatialReference(102113);
}
override public function get tileInfo():TileInfo
{
return _tileInfo;
}
//獲取矢量地圖
override protected function getTileURL(level:Number, row:Number, col:Number):URLRequest
{
var s:String = "Galileo".substring(0, ((3 * x + y) % 8));
var url:String;
url = "http://mt"+(col%4)+".google.cn/vt/lyrs=t@128,r@177000000&hl=zh-CN&gl=cn&" +
"x=" + col + "&" +
"y=" + row + "&" +
"z=" + level+ "&" +
"s=" + s;
return new URLRequest(url);
}
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)
];
}
}