r.load('http://localhost:8088/static/data/model/cesium/GroundVehicle/GroundVehicle.glb', (
                function (gltf) {
                    carmodel = gltf;
                    // rotate object so it's sitting on its base
                    carmodel.scene.rotation.x = -Math.PI * 1.5
                    carmodel.scene.scale.set(10, 10, 10);
                    $.get('http://localhost:8088/static/data/military/车辆实时.json', function (line) {
                        timeline = line.features[0].geom