Hardscape

This line layer depicts street hardscape features such as curb lines, freeways, harbor structures, boat slips, docks, airport runways, etc.该线要素图层（line layer）用于表征街道硬质景观要素，具体涵盖路缘线、高速公路、港口构筑物、船坞泊位、码头、机场跑道等。