1.屏幕坐標(biāo)（像素值）

2.笛卡爾平面坐標(biāo)? ? new Cesium.Cartesian2(x,y)

3.笛卡爾空間直角坐標(biāo)? new Cesium.Cartesian3(x,y,z)

4.地理坐標(biāo)（默認(rèn)為弧度值）new Cesium.Cartographic(longitude,latitude,height)

坐標(biāo)變換

1.獲取鼠標(biāo)單擊后在屏幕中的坐標(biāo)

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

hander.setInputAction(function(event){? ? ? //綁定鼠標(biāo)左點(diǎn)擊事件

var windowPosition=event.position;? ? ? ? ? ? //鼠標(biāo)點(diǎn)的windowPosition

},Cesium.ScreenSpaceEventType.LEFT_CLICK);

2.屏幕坐標(biāo)轉(zhuǎn)換為笛卡爾空間直角坐標(biāo)

//三維模式下

var ray=viewer.camera.getPickRay(windowPosition);

var cartesian=viewer.scene.globe.pick(ray,viewer.scene);

//二維模式下

var cartesian=scene.camera.pickEllipsoid(position,scene.globe.ellipsoid);

3.笛卡爾空間直角坐標(biāo)轉(zhuǎn)換為屏幕坐標(biāo)

var pick=Cesium.SceneTransforms.wgs84ToWindowCoordinates(viewer.scene,cartesian);

4.笛卡爾空間直角坐標(biāo)轉(zhuǎn)換為地理坐標(biāo)（弧度制）

var cartographic=Cesium.Cartographic.fromCartesian(cartesian)

5.地理坐標(biāo)（弧度制）轉(zhuǎn)換為笛卡爾空間直角坐標(biāo)

var position =Cesium.Cartesian3.fromRadians(lng,lat,height)

6.笛卡爾空間直角坐標(biāo)轉(zhuǎn)化為? 地理坐標(biāo)（經(jīng)緯度）

var cartographic=Cesium.Cartographic.fromCartesian(cartesian);

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

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

var height=cartographic.height;

(經(jīng)緯度度數(shù)與弧度互轉(zhuǎn))

Cesium.Math.toRadians(degrees);

Cesium.Math.toDegrees(radians);

7.地理坐標(biāo)（經(jīng)緯度）轉(zhuǎn)換為 笛卡爾空間直角坐標(biāo)

var position =Cesium.Cartesian3.fromDegrees(long,lat,height);