メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.351252971166 43.7672218106182, 142.349746103881 43.7676623625532, 142.348325248077 43.7651503919033, 142.35069043144 43.7644940195557, 142.351478624926 43.765997249988, 142.351686366219 43.7663934442987, 142.351741836488 43.7664992271499, 142.351733715182 43.7665015585593, 142.350986382473 43.7667155562926, 142.351252971166 43.7672218106182)) ^^http://www.opengis.net/ont/geosparql#wktLiteral