.addAttribute('position', new THREE.BufferAttribute(ps, 3).setDynamic(true));
                setLineGeometryAttribute(geometry, positions);
                this._createLine(geometry, material);

                //set object3d position
                const z = layer.altitudeToVector3(altitude, altitude).x;

                const center = lineString.getCenter();
                const v = layer.coordinateToVector3(center, z);
                this.getObject3d().position.copy(v);

                this._params 