メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.351696021489 43.1216142169864, 141.351487552715 43.1225361905883, 141.350976206519 43.1224587012457, 141.350524065941 43.1223899015893, 141.350012841107 43.1223042518493, 141.350186814328 43.1214582488776, 141.350301212552 43.121002090788, 141.350319699741 43.1210049080279, 141.350901744082 43.1210720497187, 141.351285521881 43.1211144320155, 141.351802720221 43.1211715694017, 141.351696021489 43.1216142169864)) ^^http://www.opengis.net/ont/geosparql#wktLiteral