Arcgis Server Javascript API 加载天地图数据GISVIP社区首发
废话不说直接上代码
dojo.declare("TDTLayer", esri.layers.TiledMapServiceLayer, {
constructor: function() {
this.spatialReference = new esri.SpatialReference({ wkid:4326 });
this.initialExtent = (this.fullExtent = new esri.geometry.Extent(-180.0, -90.0, 180.0, 90.0, this.spatialReference));
this.tileInfo = new esri.layers.TileInfo({
"rows" : 256,
"cols" : 256,
"compressionQuality" : 0,
"origin" : {
"x" : -180,
"y" : 90
},
"spatialReference" : {
"wkid" : 4326
},
"lods" : [
{"level" : 0, "resolution" : 0.703125, "scale" : 295497593.05875003},
{"level" : 1, "resolution" : 0.3515625, "scale" : 147748796.52937502},
{"level" : 2, "resolution" : 0.17578125, "scale" : 73874398.264687508},
{"level" : 3, "resolution" : 0.087890625, "scale" : 36937199.132343754},
{"level" : 4, "resolution" : 0.0439453125, "scale" : 18468599.566171877},
{"level" : 5, "resolution" : 0.02197265625, "scale" : 9234299.7830859385},
{"level" : 6, "resolution" : 0.010986328125, "scale" : 4617149.8915429693},
{"level" : 7, "resolution" : 0.0054931640625, "scale" : 2308574.9457714846},
{"level" : 8, "resolution" : 0.00274658203125, "scale" : 1154287.4728857423},
{"level" : 9, "resolution" : 0.001373291015625, "scale" : 577143.73644287116},
{"level" : 10, "resolution" : 0.0006866455078125, "scale" : 288571.86822143558},
{"level" : 11, "resolution" : 0.00034332275390625, "scale" : 144285.93411071779},
{"level" : 12, "resolution" : 0.000171661376953125, "scale" : 72142.967055358895},
{"level" : 13, "resolution" : 8.58306884765625e-005, "scale" : 36071.483527679447},
{"level" : 14, "resolution" : 4.291534423828125e-005, "scale" : 18035.741763839724},
{"level" : 15, "resolution" : 2.1457672119140625e-005, "scale" : 9017.8708819198619},
{"level" : 16, "resolution" : 1.0728836059570313e-005, "scale" : 4508.9354409599309},
{"level" : 17, "resolution" : 5.3644180297851563e-006, "scale" : 2254.4677204799655}
]
});
this.loaded = true;
this.onLoad(this);
},
getTileUrl: function(level, row, col) {
var levelMap = "";
if(level<10){
levelMap = "A0512_EMap";
}else if(level<12){
levelMap = "B0627_EMap1112";
}else if(level<17){
levelMap = "siwei0608";
}
return "http://tile0.tianditu.com/DataServer?T="+levelMap+"&"+
"X=" + col + "&" +
"Y=" + row + "&" +
"L=" + (level*1+1);
}
});
dojo.declare("TDTAnnoLayer", esri.layers.TiledMapServiceLayer, {
constructor: function() {
this.spatialReference = new esri.SpatialReference({ wkid:4326 });
this.initialExtent = (this.fullExtent = new esri.geometry.Extent(-180.0, -90.0, 180.0, 90.0, this.spatialReference));
this.tileInfo = new esri.layers.TileInfo({
"rows" : 256,
"cols" : 256,
"compressionQuality" : 0,
"origin" : {
"x" : -180,
"y" : 90
},
"spatialReference" : {
"wkid" : 4326
},
"lods" : [
{"level" : 0, "resolution" : 0.703125, "scale" : 295497593.05875003},
{"level" : 1, "resolution" : 0.3515625, "scale" : 147748796.52937502},
{"level" : 2, "resolution" : 0.17578125, "scale" : 73874398.264687508},
{"level" : 3, "resolution" : 0.087890625, "scale" : 36937199.132343754},
{"level" : 4, "resolution" : 0.0439453125, "scale" : 18468599.566171877},
{"level" : 5, "resolution" : 0.02197265625, "scale" : 9234299.7830859385},
{"level" : 6, "resolution" : 0.010986328125, "scale" : 4617149.8915429693},
{"level" : 7, "resolution" : 0.0054931640625, "scale" : 2308574.9457714846},
{"level" : 8, "resolution" : 0.00274658203125, "scale" : 1154287.4728857423},
{"level" : 9, "resolution" : 0.001373291015625, "scale" : 577143.73644287116},
{"level" : 10, "resolution" : 0.0006866455078125, "scale" : 288571.86822143558},
{"level" : 11, "resolution" : 0.00034332275390625, "scale" : 144285.93411071779},
{"level" : 12, "resolution" : 0.000171661376953125, "scale" : 72142.967055358895},
{"level" : 13, "resolution" : 8.58306884765625e-005, "scale" : 36071.483527679447},
{"level" : 14, "resolution" : 4.291534423828125e-005, "scale" : 18035.741763839724},
{"level" : 15, "resolution" : 2.1457672119140625e-005, "scale" : 9017.8708819198619},
{"level" : 16, "resolution" : 1.0728836059570313e-005, "scale" : 4508.9354409599309},
{"level" : 17, "resolution" : 5.3644180297851563e-006, "scale" : 2254.4677204799655}
]
});
this.loaded = true;
this.onLoad(this);
},
getTileUrl: function(level, row, col) {
return "http://tile0.tianditu.com/DataServer?T=AB0512_Anno&"+
"X=" + col + "&" +
"Y=" + row + "&" +
"L=" + (level*1+1);
}
});
把以上代码保存为lib.layer.js
在要调用的页面加入引用
<script type="text/javascript" language="Javascript" src="lib.layer.js"></script>
在初始化函数中
var basemap = new TDTLayer();
var annolayer= new TDTAnnoLayer();
map.addLayer(basemap);
map.addLayer(annolayer);