メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.379730373178 43.7482511165048, 142.379971339158 43.7488543610686, 142.379992458876 43.7489642322798, 142.378400744663 43.7496081781701, 142.377637314989 43.748884153917, 142.377618211038 43.7488588593605, 142.376945920377 43.7477939688058, 142.37892770714 43.747028933641, 142.379195845618 43.7474193568688, 142.379460345304 43.7478307922131, 142.379730373178 43.7482511165048)) ^^http://www.opengis.net/ont/geosparql#wktLiteral