使用cesium点击地图获得该位置的经纬度高度

 dbClick(viewer) {

    var handler= new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);

    handler.setInputAction(function (event) {

     var earthPosition  = viewer.camera.pickEllipsoid(event.position,viewer.scene.globe.ellipsoid);

     var cartographic = Cesium.Cartographic.fromCartesian(earthPosition, viewer.scene.globe.ellipsoid, new Cesium.Cartographic());

     var lat=Cesium.Math.toDegrees(cartographic.latitude);

     var lng=Cesium.Math.toDegrees(cartographic.longitude);

     var height=cartographic.height;

     console.log("[Lng=>"+lng+",Lat=>"+lat+",H=>"+height+"]");

    }, Cesium.ScreenSpaceEventType.LEFT_CLICK);

    },