                             st: new Cesium.GeometryAttribute({
                                    componentDatatype: Cesium.ComponentDatatype.FLOAT,
                                    componentsPerAttribute: 2,
                                    values: sts
                                }),
                            },
                            indices: indices,
                            primitiveType: Cesium.PrimitiveType.TRIANGLES,
                            boundingSphere: Cesium.Bou