ArcGIS Silverlight API访问天地图服务

天地图服务是经过缓存的数据，所以需要继承的是TiledMapServiceLayer；继承的这个图层，需要收集到以下几个信息：

n  Tiling Scheme Origin

n  切图的范围，也就是FullExtent

n  SpatialReference

n  TileInfo，包括切图的大小，级数，以及每级的Resolution

n  最后就是重写GetTileUrl方法

当地图控件的范围改变时，能够获取到当前范围的信息，那么只要把左上角和右下角之间的Tile全部按顺序显示出来就行了。

 

    天地图图层（TDTTileLyr）重载TiledMapServiceLayer

public class TDTTileLyr : TiledMapServiceLayer

    {

        public override void Initialize()

        {

 

            this.FullExtent = new

            ESRI.ArcGIS.Client.Geometry.Envelope(-180, -90, 180, 90);

            {

                SpatialReference = new ESRI.ArcGIS.Client.Geometry.SpatialReference(4326);

            };

            this.SpatialReference = new ESRI.ArcGIS.Client.Geometry.SpatialReference(4326);

            this.TileInfo = new TileInfo()

            {

                Height = 256,

                Width = 256,

                Origin = new ESRI.ArcGIS.Client.Geometry.MapPoint(-180,90)

                {

                    SpatialReference = new ESRI.ArcGIS.Client.Geometry.SpatialReference(4326)

                },

                Lods = new Lod[16]

            };

            TileInfo.Lods[0] = new Lod() { Resolution = 0.703125 };

            TileInfo.Lods[1] = new Lod() { Resolution = 0.3515625 };

            TileInfo.Lods[2] = new Lod() { Resolution = 0.17578125 };

            TileInfo.Lods[3] = new Lod() { Resolution = 0.087890625 };

            TileInfo.Lods[4] = new Lod() { Resolution = 0.0439453125 };

            TileInfo.Lods[5] = new Lod() { Resolution = 0.02197265625 };

            TileInfo.Lods[6] = new Lod() { Resolution = 0.010986328125 };

            TileInfo.Lods[7] = new Lod() { Resolution = 0.0054931640625 };

            TileInfo.Lods[8] = new Lod() { Resolution = 0.00274658203124999 };

            TileInfo.Lods[9] = new Lod() { Resolution = 0.001373291015625 };

            TileInfo.Lods[10] = new Lod() { Resolution = 0.0006866455078125 };

            TileInfo.Lods[11] = new Lod() { Resolution = 0.000343322753906249 };

            TileInfo.Lods[12] = new Lod() { Resolution = 0.000171661376953125 };

            TileInfo.Lods[13] = new Lod() { Resolution = 0.0000858306884765626 };

            TileInfo.Lods[14] = new Lod() { Resolution = 0.0000429153442382813 };

            TileInfo.Lods[15] = new Lod() { Resolution = 0.0000214576721191406 };

 

            base.Initialize();

        }

        private string _url = "";

        public override string GetTileUrl(int level, int row, int col)

        {

            string url = _url + "&X=" + col.ToString() + "&Y=" + row.ToString() + "&L=" + level.ToString();

            return url;

        }

        public string Url

        {

            get

            {

                return _url;

            }

            set

            {

                _url = value;

            }

        }

    }

 

访问天地图影像切片服务

 TDTTileLyr p = new TDTTileLyr();

 p.Url = "http://tile0.tianditu.com/DataServer?T=sbsm0210";

 p.ID = "YINGXIANG";

 p.Visible = true;

 mainMap.Layers.Add(p);

 

访问天地图矢量切片服务

TDTTileLyr p = new TDTTileLyr();

 p.Url = " http://tile0.tianditu.com/DataServer?T=A0512_EMap";

 p.ID = "SHILIANG";

 p.Visible = true;

 mainMap.Layers.Add(p);

 

 

影像服务、注记服务叠加显示

//注记

 TDTTileLyr p = new TDTTileLyr();

 p.Url = "http://tile0.tianditu.com/DataServer?T=A0610_ImgAnno";

 p.ID = "ZJ";               

 p.Visible = true;

 //影像服务

 TDTTileLyr p1 = new TDTTileLyr();

 p1.Url = "http://tile0.tianditu.com/DataServer?T=sbsm0210";

 p1.ID = "YINGXIANG";

 p1.Visible = true;

 mainMap.Layers.Add(p1);

 mainMap.Layers.Add(p);

 

 

天地图服务资源

http://www.tianditu.com/guide/resource.jsp

天地图影像服务地址

http://tile0.tianditu.com/DataServer?T=sbsm0210 （1-10级）

http://tile0.tianditu.com/DataServer?T=e11 （11级）

http://tile0.tianditu.com/DataServer?T=e12 （12级）

http://tile0.tianditu.com/DataServer?T=e13 （13级）

http://tile0.tianditu.com/DataServer?T=eastdawnall （14级）

http://tile0.tianditu.com/DataServer?T=sbsm1518 （15-18级）

初始范围：111.9, 27.85, 114.25, 28.67

天地图矢量地图服务地址

http://tile0.tianditu.com/DataServer?T=A0512_EMap （1-10级）

http://tile0.tianditu.com/DataServer?T=B0627_EMap1112 （11-12级）

http://tile0.tianditu.com/DataServer?T=siwei0608 （13-18级）

 

天地图影像注记服务地址

http://tile0.tianditu.com/DataServer?T=A0610_ImgAnno （中文地名注记）

http://tile0.tianditu.com/DataServer?T=A0104_ImgAnnoE（英文地名注记）

http://tile0.tianditu.com/DataServer?T=siweiAnno68 （注记）

 

天地图矢量注记服务地址

http://tile0.tianditu.com/DataServer?T=AB0512_Anno （中文地名注记）

http://tile0.tianditu.com/DataServer?T=AB0106_AnnoE （英文地名注记）