メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.390582272387 43.6784144650286, 142.391372746572 43.6786528462549, 142.391166631496 43.679016529798, 142.39040576012 43.680369248349, 142.389619265695 43.6801411571034, 142.388401305708 43.6797879125424, 142.389343101843 43.6780414605369, 142.390353980601 43.67834564983, 142.390410373351 43.6783626353139, 142.390582272387 43.6784144650286)) ^^http://www.opengis.net/ont/geosparql#wktLiteral