效果图:

实现代码：

const self = this;let lontitude = \, latitude = \, h = \;var handler3D = new Cesium.ScreenSpaceEventHandler(this.viewer.scene.canvas);handler3D.setInputAction(function (movement) {var pick = new Cesium.Cartesian2(movement.endPosition.x, movement.endPosition.y);if (pick) {var cartesian = self.viewer.scene.globe.pick(self.viewer.camera.getPickRay(pick), self.viewer.scene);if (cartesian) {//世界坐标转地理坐标（弧度）var cartographic = self.viewer.scene.globe.ellipsoid.cartesianToCartographic(cartesian);if (cartographic) {lontitude = Cesium.