mirror of
https://github.com/jiawanlong/Cesium-Examples.git
synced 2025-11-04 09:14:17 +00:00
119 lines
2.9 KiB
JavaScript
119 lines
2.9 KiB
JavaScript
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//判定一下是否存在了SuperMap.Web，如果没有则初始化一个
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if(SuperMap.Web == undefined )
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{
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SuperMap.Web = new Object();
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}
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//判定一下是否存在了SuperMap.Web.iConnector，如果没有则初始化一个
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if(SuperMap.Web.iConnector == undefined )
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{
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SuperMap.Web.iConnector = new Object();
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}
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/**
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* Class:
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* Bing地图适配器类
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* @constructor
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*/
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SuperMap.Web.iConnector.Bing = function(){
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}
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SuperMap.Web.iConnector.Bing.getTileLayer = function(url,options){
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if(url == undefined)
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{
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return;
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}
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var layerUrl = url + "/image.png?redirect=false&width=256&height=256";
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//分辨率
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var resAry= [];
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resAry[0] = 78271.5170;
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resAry[1] = 39135.7585;
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resAry[2] = 19567.8792;
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resAry[3] = 9783.9396;
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resAry[4] = 4891.9698;
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resAry[5] = 2445.9849;
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resAry[6] = 1222.9925;
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resAry[7] = 611.4962;
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resAry[8] = 305.7481;
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resAry[9] = 152.8741;
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resAry[10] = 76.4370;
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resAry[11] = 38.2185;
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resAry[12] = 19.1093;
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resAry[13] = 9.5546;
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resAry[14] = 4.7773;
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resAry[15] = 2.3887;
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resAry[16] = 1.1943;
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resAry[17] = 0.5972;
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resAry[18] = 0.2986;
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resAry[19] = 0.1493;
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resAry[20] = 0.0746;
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resAry[21] = 0.0373;
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resAry[22] = 0.0187;
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//计算比例尺数组
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var scaAry = [];
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for(var i = 0;i<17;i++)
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{
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scaAry[i] = 0.0254/(96*resAry[i]); //0.0254是meters和pixel的转换
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}
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var tileSource = new Microsoft.Maps.TileSource({uriConstructor: getTilePath});
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var tilelayer= new Microsoft.Maps.TileLayer({ mercator: tileSource, opacity: 1 });
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//切片是否透明
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var transparent = true;
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if(options && options.transparent !=undefined)
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{
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transparent = options.transparent;
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}
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layerUrl += "&transparent=" + transparent;
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//是否是否使用缓存
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var cacheEnabled = false;
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if(options && options.cacheEnabled !=undefined)
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{
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cacheEnabled = options.cacheEnabled;
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}
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layerUrl += "&cacheEnabled=" + cacheEnabled;
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if(options && options.layersID !=undefined)
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{
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layerUrl += "&layersID=" +options.layersID;
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}
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//改写bing地图的gettilesource方法
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function getTilePath(tile){
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var x = tile.x;
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var y = tile.y;
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var z = tile.levelOfDetail;
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var po = Math.pow(2,z);
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x-=po/2;
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y=po/2-y-1;
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//使用bounds出图（也可以使用center）
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var left = x*256*resAry[z-1];
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var bottom = y*256*resAry[z-1];
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var right = (x + 1)*256*resAry[z-1];
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var top = (y + 1)*256*resAry[z-1];
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//将bounds组合到url里面
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var tileUrl = layerUrl+"&viewBounds=" +"{\"leftBottom\" : {\"x\":" + left +",\"y\":" + bottom +"},\"rightTop\" : {\"x\":" + right +",\"y\":" +top + "}}";
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tileUrl +="&scale=" +scaAry[z];
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//var epsg=projection==="3857"?3857:4326;
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tileUrl += "&prjCoordSys={\"epsgCode\":"+3857+"}";
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return tileUrl;
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}
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return tilelayer;
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};
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