使用Java的ArcGis Api将经纬度转换为XY坐标

Kal*_*ium 1 javascript gis arcgis-js-api

您好,我正在尝试使用ArcGis Api For Javascript将较长的经度值转换为X,Y

 var i = esri.geometry.lngLatToXY(3.13, 36.742)
 console.log(i); //returns Array [ 348541.32567373366, 4403205.668961807 ]
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转换在什么系统上进行?有没有指定投影系统的方法?

注意:转换是从十进制度到米

我遵循了这个:https : //developers.arcgis.com/javascript/3/jsapi/esri.geometry.webmercatorutils-amd.html

Geo*_*ute 5

此方法用于将地理坐标系的经度/纬度(wkid 4326)转换为投影坐标系Web Mercator(wkid 102100)。

默认的esri地图使用Web Mercator作为投影系统。如果需要将坐标转换为其他坐标系,则需要使用projectGeometryService 的方法:https : //developers.arcgis.com/javascript/3/jsapi/geometryservice-amd.html

例:

require(["esri/geometry/Point", "esri/tasks/GeometryService", "esri/tasks/ProjectParameters", "esri/SpatialReference", "dojo/domReady!"],
  function(Point, GeometryService, ProjectParameters, SpatialReference) {

    var outSR = "YOUR_OUTPUT_COORDINATE_SYSTEM"; // `wkid {number}`
    var geometryService = new GeometryService("https://utility.arcgisonline.com/ArcGIS/rest/services/Geometry/GeometryServer");
    var inputpoint = new Point({
      longitude: "YOUR_LONGITUDE_INPUT",
      latitude: "YOUR_LATITUDE_INPUT"
    });

    var projectParams = new ProjectParameters();
    projectParams.geometries = [inputpoint];
    projectParams.outSR = new SpatialReference({ wkid: outSR });

    geometryService.project(projectParams, (result) => {
      let outputpoint = result[0]; // outputpoint first element of result array
      console.log("Result x:", outputpoint.x, "y :", outputpoint.y);
    });
  });
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Wkid号码可以在这里找到:

编辑

这是一个工作示例:Plunker