mirror of
https://github.com/jiawanlong/Cesium-Examples.git
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331 lines
15 KiB
JavaScript
331 lines
15 KiB
JavaScript
/**
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* Created with JetBrains WebStorm.
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* User: liuyayun
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* Date: 13-5-27
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* Time: 下午4:01
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* To change this template use File | Settings | File Templates.
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*/
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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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* ArcGIS适配器类
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* @constructor
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*/
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SuperMap.Web.iConnector.ArcGIS = function(){
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}
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/**
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* APIMethod:
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* 创建ArcGIS地图的扩展图层（图层继承于TiledMapServiceLayer），这里的图层中切片的来源为iserver服务器
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* @param url {String} 地图服务的url地址，如：“http://localhost:8090/iserver/services/map-china400/rest/maps/China”
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* @param options 可选的参数
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* transparent - {Boolean} 设置切片是否透明，默认为true
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* cacheEnabled - {Boolean} 设置是否使用缓存，默认为false
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* layersID - {String} 设置临时图层的id，一般用于专题图的叠加使用
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* @returns {TTileLayer} 返回ArcGIS地图的扩展图层对象
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*/
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SuperMap.Web.iConnector.ArcGIS.getLayer = function(url,options){
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dojo.declare("MyTiledMapServiceLayer", esri.layers.TiledMapServiceLayer, {
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constructor: 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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this.spatialReference = new esri.SpatialReference({ wkid:3857 });
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this.initialExtent = (this.fullExtent = new esri.geometry.Extent(-20037508.3392, -20037508.3392, 20037508.3392, 20037508.3392, this.spatialReference));
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this.tileInfo = new esri.layers.TileInfo({
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"rows" : 256,
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"cols" : 256,
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"dpi" : 96,
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"compressionQuality" : 0,
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"origin" : {
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"x" : -20037508.3392,
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"y" : 20037508.3392
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},
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"spatialReference" : {
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"wkid" : 3857
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},
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"lods" : [
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{"level" : 0, "resolution" : 156543.033928, "scale" : 591657527.591555},
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{"level" : 1, "resolution" : 78271.5169639999, "scale" : 295828763.795777},
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{"level" : 2, "resolution" : 39135.7584820001, "scale" : 147914381.897889},
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{"level" : 3, "resolution" : 19567.8792409999, "scale" : 73957190.948944},
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{"level" : 4, "resolution" : 9783.93962049996, "scale" : 36978595.474472},
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{"level" : 5, "resolution" : 4891.96981024998, "scale" : 18489297.737236},
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{"level" : 6, "resolution" : 2445.98490512499, "scale" : 9244648.868618},
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{"level" : 7, "resolution" : 1222.99245256249, "scale" : 4622324.434309},
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{"level" : 8, "resolution" : 611.49622628138, "scale" : 2311162.217155},
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{"level" : 9, "resolution" : 305.748113140558, "scale" : 1155581.108577},
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{"level" : 10, "resolution" : 152.874056570411, "scale" : 577790.554289},
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{"level" : 11, "resolution" : 76.4370282850732, "scale" : 288895.277144},
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{"level" : 12, "resolution" : 38.2185141425366, "scale" : 144447.638572},
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{"level" : 13, "resolution" : 19.1092570712683, "scale" : 72223.819286},
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{"level" : 14, "resolution" : 9.55462853563415, "scale" : 36111.909643},
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{"level" : 15, "resolution" : 4.77731426794937, "scale" : 18055.954822},
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{"level" : 16, "resolution" : 2.38865713397468, "scale" : 9027.977411},
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{"level" : 17, "resolution" : 1.19432856685505, "scale" : 4513.988705},
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{"level" : 18, "resolution" : 0.597164283559817, "scale" : 2256.994353},
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{"level" : 19, "resolution" : 0.298582141647617, "scale" : 1128.497176}
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]
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});
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var layerUrl = url + "/image.png?redirect=false&width=256&height=256";
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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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//如果有layersID，则是在使用专题图
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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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this.url = layerUrl;
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var resLen = 17;
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var resStart = 0;
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this.resolutions3857 = [];
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var dpi = 95.99999999999984;
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this.scales3857 = [];
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for(var i=resStart;i<=resLen;i++){
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var res3857 = 156543.0339/Math.pow(2,i);
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this.resolutions3857.push(res3857);
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var scale3857 = 0.0254/dpi/res3857;
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this.scales3857.push(scale3857);
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}
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this.loaded = true;
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this.onLoad(this);
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},
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getTileUrl: function(level, row, col) {
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var zoom = level;
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var po = Math.pow(2,zoom);
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var x = col;
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var y = row;
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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*this.resolutions3857[zoom];
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var bottom = y*256*this.resolutions3857[zoom];
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var right = (x + 1)*256*this.resolutions3857[zoom];
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var top = (y + 1)*256*this.resolutions3857[zoom];
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//将bounds组合到url里面
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tileUrl =this.url + "&viewBounds=" +"{\"leftBottom\" : {\"x\":" + left +",\"y\":" + bottom +"},\"rightTop\" : {\"x\":" + right +",\"y\":" +top + "}}";
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tileUrl +="&scale=" +this.scales3857[zoom];
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tileUrl += "&prjCoordSys={\"epsgCode\":3857}";
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return tileUrl;
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}
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});
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var layer = new MyTiledMapServiceLayer(url,options);
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return layer;
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}
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/**
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* APIMethod:
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* 将其他坐标系下的点转换为ArcGIS地图的点
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* @param array 点数组，支持五种形式的点：
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* 1、var points = [
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* {x:116.1,y:38.9},
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* {x:114.1,y:34.1}
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* ];
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* 2、var points = [
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* new SuperMap.Geometry.Point(116.1,38.9),
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* new SuperMap.Geometry.Point(116.1,38.9)
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* ];
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* 3、var points = [
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* new SuperMap.LonLat(116.1,38.9),
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* new SuperMap.LonLat(116.1,38.4)
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* ];
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* 4、var points = [
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* new esri.geometry.Point(116.38,39.9),
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* new esri.geometry.Point(116.35,39.9)
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* ];
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* 5、var points = [
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* [106,39],
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* [109,40]
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* ]
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* @param projection {SuperMap.Projection} 待转换点的投影系（数组里面的所有点投影系都必须是统一的），默认为4326.
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* @returns {Array} 返回esri.geometry.Point对象的数组
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*/
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SuperMap.Web.iConnector.ArcGIS.transferPoint = function(array,projection){
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if((typeof array) == "object" && array != null && array.constructor == Array)
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{
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var pro = projection || new SuperMap.Projection("EPSG:4326");
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var points = []
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//分几种不同的情况
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for(var i = 0;i<array.length;i++)
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{
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var smPoint;
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if(array[i].CLASS_NAME && array[i].CLASS_NAME == "SuperMap.LonLat")
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{
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//首先转换为标准4326的坐标
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smPoint = SuperMap.Projection.transform(new SuperMap.Geometry.Point(array[i].lon,array[i].lat),pro,new SuperMap.Projection("EPSG:4326"));
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}
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//支持{x:118,y:38}和SuperMap.Geometry.Point的形式以及esri.geometry.Point，因为都存在x和y
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else if(array[i].x != undefined && array[i].y != undefined)
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{
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//首先转换为标准4326的坐标
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smPoint = SuperMap.Projection.transform(new SuperMap.Geometry.Point(array[i].x,array[i].y),pro,new SuperMap.Projection("EPSG:4326"));
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}
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//支持[108,39]数组形式
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else if(array[i].constructor == Array)
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{
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smPoint = SuperMap.Projection.transform(new SuperMap.Geometry.Point(array[i][0],array[i][1]),pro,new SuperMap.Projection("EPSG:4326"));
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}
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var traPoint = SuperMap.Web.iConnector.ArcGIS.transfer(smPoint.x,smPoint.y);
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var point = new esri.geometry.Point(traPoint.lng,traPoint.lat);
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points.push(point);
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}
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return points;
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}
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}
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/**
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* APIMethod:
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* 将其他坐标系下的线数组转换为ArcGIS地图支持的线数组
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* @param array 线数组，支持两种形式
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* 1、var lines = [new SuperMap.Geometry.LineString(
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* new SuperMap.Geometry.Point(116.1,38.9),
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* new SuperMap.Geometry.Point(116.1,38.9)
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* )];
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* 2、var lines = [new esri.geometry.Polyline(
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* {
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* "paths":[[[-122.68,45.53], [-122.58,45.55],[-122.57,45.58],[-122.53,45.6]]],
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* "spatialReference":{"wkid":4326}
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* }
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* )];
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* @param projection {SuperMap.Projection} 需要转换的线的坐标系
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* @returns {Array} 返回esri.geometry.Polyline对象的数组
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*/
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SuperMap.Web.iConnector.ArcGIS.transferLine = function(array,projection){
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if((typeof array) == "object" && array != null && array.constructor == Array)
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{
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var pro = projection || new SuperMap.Projection("EPSG:4326");
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var lines = [];
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//分几种不同的情况，现在只提供两种
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for(var i = 0;i<array.length;i++)
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{
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var line;
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//支持supermap的LineString
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if(array[i].CLASS_NAME && array[i].CLASS_NAME == "SuperMap.Geometry.LineString")
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{
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var points = SuperMap.Web.iConnector.ArcGIS.transferPoint(array[i].components,pro);
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line = new esri.geometry.Polyline();
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line.addPath(points);
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}
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//支持esri.geometry.Polyline的对象
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else if(array[i].constructor == esri.geometry.Polyline)
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{
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line = new esri.geometry.Polyline();
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for(var j = 0;j<array[i].paths.length;j++)
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{
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var points = SuperMap.Web.iConnector.ArcGIS.transferPoint(array[i].paths[j],pro);
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line.addPath(points);
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}
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}
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lines.push(line);
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}
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return lines;
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}
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}
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/**
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* APIMethod:
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* 将其他坐标系下的多边形数组转换为ArcGIS地图支持的多边形数组
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* @param array 多边形数组，支持两种形式：
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* 1、var polygons = [new SuperMap.Geometry.Polygon(
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* [new SuperMap.Geometry.LinearRing(
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* new SuperMap.Geometry.Point(116.3786889372559,39.90762965106183),
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* new SuperMap.Geometry.Point(116.38632786853032,39.90795884517671),
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* new SuperMap.Geometry.Point(116.38534009082035,39.897432133833574),
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* new SuperMap.Geometry.Point(116.37624058825688,39.89789300648029)
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* )
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* ]
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* )];
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* 2、var polygons = [new esri.geometry.Polygon(
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* {
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* "rings":[
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* [[-122.63,45.52],[-122.57,45.53],[-122.52,45.50],[-122.49,45.48],[-122.64,45.49],[-122.63,45.52],[-122.63,45.52]]
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* ],
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* "spatialReference":{" wkid":4326 }
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* }
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* )];
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* @param projection {SuperMap.Projection} 需要转换的多边形的坐标系
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* @returns {Array} 返回esri.geometry.Polygon对象的数组
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*/
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SuperMap.Web.iConnector.ArcGIS.transferPolygon = function(array,projection){
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if((typeof array) == "object" && array != null && array.constructor == Array)
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{
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var pro = projection || new SuperMap.Projection("EPSG:4326");
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var polygons = [];
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//分几种不同的情况，现在只提供两种
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for(var i = 0;i<array.length;i++)
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{
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var polygon;
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//支持supermap的Polygon
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if(array[i].CLASS_NAME && array[i].CLASS_NAME == "SuperMap.Geometry.Polygon")
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{
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var points = SuperMap.Web.iConnector.ArcGIS.transferPoint(array[i].getVertices(false),pro);
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polygon = new esri.geometry.Polygon();
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polygon.addRing(points);
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}
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//支持esri.geometry.Polyline的对象
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else if(array[i].constructor == esri.geometry.Polygon)
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{
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polygon = new esri.geometry.Polygon();
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for(var j = 0;j<array[i].rings.length;j++)
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{
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var points = SuperMap.Web.iConnector.ArcGIS.transferPoint(array[i].rings[j],pro);
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polygon.addRing(points);
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}
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}
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polygons.push(polygon);
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}
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return polygons;
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}
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}
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/**
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* APIMethod:
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* 数据纠偏方法，未实现。
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* 由于底图和数据都存在标准和偏移的情况，当用户的底图和数据都是标准或者偏移的，那不需要实现此方法，如果不一致需要用户实现两者之间的转换
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* 当用户需要纠偏时，则需要覆盖此方法，内部每次转换前会调用此方法，将待转换的经度坐标和纬度坐标传进来，通过用户的方式实现纠偏后按照形如
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* {lng:116.4,lat:39.4}的格式返回即可
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* 比如用户的地图为中国范围的ArcGIS地图（是做了偏移的），如果没有买ArcGIS的纠偏数据，用自己的真实数据叠加上去就会出现位置错误，
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* 此时就需要实现此方法，将每一个坐标进行纠偏
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*
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* @param lng {Number} 需要纠偏的经度坐标
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* @param lat {Number} 需要纠偏的纬度坐标
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* @returns {Object} 返回一个Object对象，如：{lng:116.4,lat:39.4}
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*/
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SuperMap.Web.iConnector.ArcGIS.transfer = function(lng,lat){
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return {lng:lng,lat:lat};
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}
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