メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.765861233888 43.1888599332692, 141.765858503161 43.1891575488444, 141.765827893194 43.1895044878181, 141.765777771147 43.1896992939595, 141.765702435829 43.1898918841635, 141.765581872898 43.1901338637413, 141.765066010542 43.1898675270563, 141.764644087479 43.1896399142554, 141.765105134761 43.1891428931907, 141.76554218345 43.1886896541715, 141.765861233888 43.1888599332692)) ^^http://www.opengis.net/ont/geosparql#wktLiteral