1.加载arcgis数据——ArcGisMapServerImageryProvider var viewer = new Cesium.Viewer("cesiumDiv",{ imageryProvider:new Cesium.ArcGisMapServerImageryProvider({ url:'http://atlasmaps.esri.com/arcgis/rest/services/Esri/USA_Population_Density
网上目前有两种获取当前Camera的四至范围的方法 方法一 这种方法是最通用的,即使在哥伦布视角(2.5D下依旧能准确获取值) function getCurrentExtent() { // 范围对象 var extent = {}; // 得到当前三维场景 var scene = viewer.scene; // 得到当前三维场景的椭球体 var ellipsoid = scene.globe.ellipsoid; var canvas = scene.canvas; // canva
var picklHandler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);picklHandler .setInputAction(function (click) { var pick = viewer.camera.getPickRay(click.position); var cartesian = scene.globe.pick(pick, viewer.scene); if (cartesian) { var