Nacional Location Community of Madrid , Spain Coordinates 40° 26′ 35.27″ N, 3° 42′ 24.37″ W Established 1870 Website www.ign.es/ign/main/index.do Authority
Nacional Location Community of Madrid , Spain Coordinates 40° 26′ 35.27″ N, 3° 42′ 24.37″ W Established 1870 Website www.ign.es/ign/main/index.do Authority