mirror of
https://github.com/jiawanlong/Cesium-Examples.git
synced 2025-11-04 09:14:17 +00:00
316 lines
12 KiB
JavaScript
316 lines
12 KiB
JavaScript
/**
|
||
* Created with JetBrains WebStorm.
|
||
* User: liuyayun
|
||
* Date: 13-5-27
|
||
* Time: 上午9:56
|
||
* To change this template use File | Settings | File Templates.
|
||
*/
|
||
//判定一下是否存在了SuperMap.Web，如果没有则初始化一个
|
||
if(SuperMap.Web == undefined )
|
||
{
|
||
SuperMap.Web = new Object();
|
||
}
|
||
//判定一下是否存在了SuperMap.Web.iConnector，如果没有则初始化一个
|
||
if(SuperMap.Web.iConnector == undefined )
|
||
{
|
||
SuperMap.Web.iConnector = new Object();
|
||
}
|
||
/**
|
||
* Class:
|
||
* 天地图适配器类
|
||
* @constructor
|
||
*/
|
||
SuperMap.Web.iConnector.Tianditu = function(){
|
||
|
||
}
|
||
|
||
|
||
/**
|
||
* APIMethod:
|
||
* 创建天地图的TTileLayer，这里的TTileLayer中切片的来源为iserver服务器
|
||
* 当把此layer添加进map后，会从map里获取当前的投影是4326还是3857来动态的出图
|
||
* @param url {String} 地图服务的url地址，如：“localhost:8090/iserver/services/map-world/rest/maps/World”
|
||
* @param options 可选的参数
|
||
* transparent - {Boolean} 设置切片是否透明，默认为true
|
||
* cacheEnabled - {Boolean} 设置是否使用缓存，默认为false
|
||
* layersID - {String} 设置临时图层的id，一般用于专题图的叠加使用
|
||
* @returns {TTileLayer} 返回天地图的TTileLayer对象
|
||
*/
|
||
SuperMap.Web.iConnector.Tianditu.getLayer = function(url,options){
|
||
if(url == undefined)
|
||
{
|
||
return;
|
||
}
|
||
var tileLayer = new TTileLayer();
|
||
var layerUrl = url + "/image.png?redirect=false&width=256&height=256";
|
||
|
||
//切片是否透明
|
||
var transparent = true;
|
||
if(options && options.transparent !=undefined)
|
||
{
|
||
transparent = options.transparent;
|
||
}
|
||
layerUrl += "&transparent=" + transparent;
|
||
|
||
//是否是否使用缓存
|
||
var cacheEnabled = false;
|
||
if(options && options.cacheEnabled !=undefined)
|
||
{
|
||
cacheEnabled = options.cacheEnabled;
|
||
}
|
||
layerUrl += "&cacheEnabled=" + cacheEnabled;
|
||
|
||
//如果有layersID，则是在使用专题图
|
||
if(options && options.layersID !=undefined)
|
||
{
|
||
layerUrl += "&layersID=" +options.layersID;
|
||
}
|
||
//计算分辨率和比例尺
|
||
var resLen = 17;
|
||
var resStart = 0;
|
||
var resolutions4326 = [];
|
||
var resolutions3857 = [];
|
||
var dpi = 95.99999999999984;
|
||
var scales4326 = [];
|
||
var scales3857 = [];
|
||
for(var i=resStart;i<=resLen;i++){
|
||
var res4326 = 1.40625/Math.pow(2,i);
|
||
resolutions4326.push(res4326);
|
||
|
||
var scale4326 = 0.0254*360/dpi/res4326/Math.PI/2/6378137;
|
||
scales4326.push(scale4326);
|
||
}
|
||
|
||
tileLayer.scales4326 = scales4326;
|
||
|
||
for(var i=resStart;i<=resLen;i++){
|
||
var res3857 = 156543.0339/Math.pow(2,i);
|
||
resolutions3857.push(res3857);
|
||
|
||
var scale3857 = 0.0254/dpi/res3857;
|
||
scales3857.push(scale3857);
|
||
}
|
||
tileLayer.scales3857 = scales3857;
|
||
|
||
|
||
|
||
|
||
|
||
tileLayer.setGetTileUrl(
|
||
function(x,y,z)
|
||
{
|
||
if(this.myProjectionCodeName)
|
||
{}
|
||
else
|
||
{
|
||
//遍历一下tileLayer，需找当前的投影系属性名称
|
||
var ps = this.tmaps;
|
||
for ( var p in ps )
|
||
{
|
||
if ( typeof ( ps [ p ]) == " function " )
|
||
{
|
||
}
|
||
else
|
||
{ // p 为属性名称，ps[p]为对应属性的值
|
||
if(ps [ p ] == "EPSG:4326" || ps [ p ] == "EPSG:900913")
|
||
{
|
||
this.myProjectionCodeName = p;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
var tileUrl = layerUrl;
|
||
|
||
if(this.tmaps[this.myProjectionCodeName] == "EPSG:4326")
|
||
{
|
||
tileUrl +="&scale=" +this.scales4326[z];
|
||
tileUrl += "&prjCoordSys={\"epsgCode\":4326}";
|
||
var orginX = -180;var orginY = 90;
|
||
//使用center来出图 （也可以使用bounds出图）
|
||
var centerX = orginX + resolutions4326[z] *x *256 + resolutions4326[z]*128;
|
||
var centerY = orginY-( resolutions4326[z] *y *256 + resolutions4326[z]*128) ;
|
||
tileUrl+= "¢er={\"x\":" + centerX+",\"y\":" + centerY + "}" ;
|
||
return tileUrl;
|
||
}
|
||
else if(this.tmaps[this.myProjectionCodeName] == "EPSG:900913")
|
||
{
|
||
var po = Math.pow(2,z);
|
||
x-=po/2;
|
||
y=po/2-y-1;
|
||
//使用bounds出图（也可以使用center）
|
||
var left = x*256*resolutions3857[z];
|
||
var bottom = y*256*resolutions3857[z];
|
||
var right = (x + 1)*256*resolutions3857[z];
|
||
var top = (y + 1)*256*resolutions3857[z];
|
||
//将bounds组合到url里面
|
||
tileUrl += "&viewBounds=" +"{\"leftBottom\" : {\"x\":" + left +",\"y\":" + bottom +"},\"rightTop\" : {\"x\":" + right +",\"y\":" +top + "}}";
|
||
|
||
tileUrl +="&scale=" +this.scales3857[z];
|
||
tileUrl += "&prjCoordSys={\"epsgCode\":3857}";
|
||
}
|
||
return tileUrl;
|
||
}
|
||
);
|
||
return tileLayer;
|
||
}
|
||
|
||
|
||
|
||
/**
|
||
* APIMethod:
|
||
* 将其他坐标系下的点转换为天地图的点
|
||
* @param array 点数组，支持四种形式的点：
|
||
* 1、var points = [
|
||
* {x:116.1,y:38.9},
|
||
* {x:114.1,y:34.1}
|
||
* ];
|
||
* 2、var points = [
|
||
* new SuperMap.Geometry.Point(116.1,38.9),
|
||
* new SuperMap.Geometry.Point(116.1,38.9)
|
||
* ];
|
||
* 3、var points = [
|
||
* new SuperMap.LonLat(116.1,38.9),
|
||
* new SuperMap.LonLat(116.1,38.4)
|
||
* ];
|
||
* 4、var points = [
|
||
* new TLngLat(116.38,39.9),
|
||
* new TLngLat(116.38,39.9)
|
||
* ];
|
||
* @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.
|
||
* @returns {Array} 返回TLngLat对象的数组
|
||
*/
|
||
SuperMap.Web.iConnector.Tianditu.transferPoint = function(array,projection){
|
||
if((typeof array) == "object" && array != null && array.constructor == Array)
|
||
{
|
||
var pro = projection || new SuperMap.Projection("EPSG:4326");
|
||
var points = []
|
||
//分几种不同的情况
|
||
for(var i = 0;i<array.length;i++)
|
||
{
|
||
var smPoint;
|
||
if(array[i].CLASS_NAME && array[i].CLASS_NAME == "SuperMap.LonLat")
|
||
{
|
||
//首先转换为标准4326的坐标
|
||
smPoint = SuperMap.Projection.transform(new SuperMap.Geometry.Point(array[i].lon,array[i].lat),pro,new SuperMap.Projection("EPSG:4326"));
|
||
|
||
}
|
||
//支持{x:118,y:38}和SuperMap.Geometry.Point的形式，因为都存在x和y
|
||
else if(array[i].x != undefined && array[i].y != undefined)
|
||
{
|
||
//首先转换为标准4326的坐标
|
||
smPoint = SuperMap.Projection.transform(new SuperMap.Geometry.Point(array[i].x,array[i].y),pro,new SuperMap.Projection("EPSG:4326"));
|
||
|
||
}
|
||
//支持天地图的TLngLat的形式
|
||
else if(array[i].getLng != undefined && array[i].getLat != undefined)
|
||
{
|
||
//首先转换为标准4326的坐标
|
||
smPoint = SuperMap.Projection.transform(new SuperMap.Geometry.Point(array[i].getLng(),array[i].getLat()),projection,new SuperMap.Projection("EPSG:4326"));
|
||
|
||
}
|
||
var point = new TLngLat(smPoint.x,smPoint.y);
|
||
points.push(point);
|
||
}
|
||
return points;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* APIMethod:
|
||
* 将其他坐标系下的线数组转换为天地图支持的线数组
|
||
* @param array 线数组，支持两种形式
|
||
* 1、var lines = [new SuperMap.Geometry.LineString(
|
||
* new SuperMap.Geometry.Point(116.1,38.9),
|
||
* new SuperMap.Geometry.Point(116.1,38.9)
|
||
* )];
|
||
* 2、var lines = [new TPolyline(
|
||
* new TLngLat(116.38,39.9),
|
||
* new TLngLat(116.38,39.9)
|
||
* )];
|
||
* @param projection {SuperMap.Projection} 需要转换的线的坐标系
|
||
* @returns {Array} 返回TPolyline对象的数组
|
||
*/
|
||
SuperMap.Web.iConnector.Tianditu.transferLine = function(array,projection){
|
||
if((typeof array) == "object" && array != null && array.constructor == Array)
|
||
{
|
||
var pro = projection || new SuperMap.Projection("EPSG:4326");
|
||
var lines = [];
|
||
//分几种不同的情况，现在只提供两种
|
||
for(var i = 0;i<array.length;i++)
|
||
{
|
||
var line;
|
||
//支持supermap的LineString
|
||
if(array[i].CLASS_NAME && array[i].CLASS_NAME == "SuperMap.Geometry.LineString")
|
||
{
|
||
var points = SuperMap.Web.iConnector.Tianditu.transferPoint(array[i].components,pro);
|
||
line = new TPolyline(points);
|
||
}
|
||
//支持TPolyline的对象
|
||
else if(array[i].polygonType != undefined && array[i].getType() == 4)
|
||
{
|
||
var points = SuperMap.Web.iConnector.Tianditu.transferPoint(array[i].getLngLats(),pro);
|
||
line = new TPolyline(points);
|
||
}
|
||
|
||
lines.push(line);
|
||
}
|
||
return lines;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* APIMethod:
|
||
* 将其他坐标系下的多边形数组转换为天地图支持的多边形数组
|
||
* @param array 多边形数组，支持两种形式：
|
||
* 1、var polygons = [new SuperMap.Geometry.Polygon(
|
||
* [new SuperMap.Geometry.LinearRing(
|
||
* new SuperMap.Geometry.Point(116.3786889372559,39.90762965106183),
|
||
* new SuperMap.Geometry.Point(116.38632786853032,39.90795884517671),
|
||
* new SuperMap.Geometry.Point(116.38534009082035,39.897432133833574),
|
||
* new SuperMap.Geometry.Point(116.37624058825688,39.89789300648029)
|
||
* )
|
||
* ]
|
||
* )];
|
||
* 2、var polygons = [new TPolygon(
|
||
* new TLngLat(116.3786889372559,39.90762965106183),
|
||
* new TLngLat(116.38632786853032,39.90795884517671),
|
||
* new TLngLat(116.38534009082035,39.897432133833574),
|
||
* new TLngLat(116.37624058825688,39.89789300648029)
|
||
* )];
|
||
* @param projection {SuperMap.Projection} 需要转换的多边形的坐标系
|
||
* @returns {Array} 返回TPolygon对象的数组
|
||
*/
|
||
SuperMap.Web.iConnector.Tianditu.transferPolygon = function(array,projection){
|
||
if((typeof array) == "object" && array != null && array.constructor == Array)
|
||
{
|
||
var pro = projection || new SuperMap.Projection("EPSG:4326");
|
||
var polygons = [];
|
||
//分几种不同的情况，现在只提供两种
|
||
for(var i = 0;i<array.length;i++)
|
||
{
|
||
var polygon;
|
||
//支持supermap的Polygon
|
||
if(array[i].CLASS_NAME && array[i].CLASS_NAME == "SuperMap.Geometry.Polygon")
|
||
{
|
||
var points = SuperMap.Web.iConnector.Tianditu.transferPoint(array[i].getVertices(false),pro);
|
||
polygon = new TPolygon(points);
|
||
}
|
||
|
||
//支持TPolyline的对象
|
||
else if(array[i].getType != undefined && array[i].getType() == 5)
|
||
{
|
||
var points = SuperMap.Web.iConnector.Tianditu.transferPoint(array[i].getLngLats(),pro);
|
||
polygon = new TPolygon(points);
|
||
}
|
||
|
||
polygons.push(polygon);
|
||
}
|
||
return polygons;
|
||
}
|
||
}
|
||
|
||
|