Arcgis for javascript 坐标转换 ajax请求的方式

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返回 json

$.ajax({

                type: 'GET',
                dataType: 'jsonp',
                url: 'http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Geometry/GeometryServer/project?f=pjson&inSR=4326&outSR=102113&geometries={"geometryType":"esriGeometryPoint","geometries":[{"x":-117,"y":34}]}',
                success: function (data) {
                    alert(data.geometries[0].x + " " + data.geometries[0].y);
                },
                error: function (jqXHR, textStatus, errorThrown) {
                    alert('error');
                }

});

返回html

$.ajax({

                type: 'GET',
                dataType: 'jsonp',
                url: 'http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Geometry/GeometryServer/project?f=HTML&inSR=4326&outSR=102113&geometries={"geometryType":"esriGeometryPoint","geometries":[{"x":-117,"y":34}]}',
                success: function (data) {
                    alert(data.geometries[0].x + " " + data.geometries[0].y);
                },
                error: function (jqXHR, textStatus, errorThrown) {
                    alert('error');
                }

});

网页

http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Geometry/GeometryServer/project?inSR=4326&outSR=102113&geometries={"geometryType":"esriGeometryPoint","geometries":[{"x":-117,"y":34}]}

前台脚本转换要求api3.0及以上

var geometryService = new esri.tasks.GeometryService("http://tasks.arcgisonline.com/ArcGIS/rest/services/Geometry/GeometryServer");

var incoord = 102100; //当前坐标系

var outcoord = 4326; //目标坐标系

var inSR = new esri.SpatialReference({wkid: incoord });

var outSR = new esri.SpatialReference({wkid: outcoord});

var inputpoint = new esri.geometry.Point(evt.mapPoint.x, evt.mapPoint.y, inSR);

var PrjParams = new esri.tasks.ProjectParameters();

PrjParams.geometries = [inputpoint];

PrjParams.outSR = outSR;

PrjParams.transformation = {wkid: parseInt(4326)}

geometryService.project(PrjParams, function (outputpoint) {

alert(经度："+outputpoint[0].x+",纬度："+ outputpoint[0].y);

});