メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.630280516589 35.4512713813, 139.629206802913 35.4526014958103, 139.628669901654 35.4523829023396, 139.629262116515 35.4516308197196, 139.629745042309 35.4510175141639, 139.630280516589 35.4512713813)) ^^http://www.opengis.net/ont/geosparql#wktLiteral