メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.346628066723 44.4852462762763, 142.345527838876 44.4850012458052, 142.345541911341 44.4849762032452, 142.345547835705 44.4849656862939, 142.345984377636 44.484158695581, 142.346971306124 44.4843971357009, 142.347042358449 44.484402032458, 142.346628066723 44.4852462762763)) ^^http://www.opengis.net/ont/geosparql#wktLiteral