メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.358360089097 43.1313527855952, 141.35897170089 43.1312437501383, 141.359152495877 43.1319744604361, 141.359354285091 43.1327210172835, 141.358717775933 43.1328239457918, 141.358077798061 43.132934589959, 141.357523672024 43.1330446336822, 141.356925856354 43.1331478628989, 141.356801894748 43.1327903354769, 141.356687617466 43.1324140341584, 141.356559419835 43.13204423632, 141.356457157301 43.1316871585725, 141.357047591494 43.1315755034816, 141.357613667615 43.1314746975803, 141.358360089097 43.1313527855952)) ^^http://www.opengis.net/ont/geosparql#wktLiteral