メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.323453864762 43.7616367056753, 142.323974850216 43.7617766617794, 142.32333430689 43.7629054021238, 142.322809950756 43.7627394609153, 142.3226307808 43.7626804346375, 142.322543526696 43.7626144404561, 142.322028302795 43.7624769361227, 142.322497584618 43.7617254995968, 142.32298718381 43.7618521359158, 142.32315628669 43.761556536831, 142.323453864762 43.7616367056753)) ^^http://www.opengis.net/ont/geosparql#wktLiteral