メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.171030112597 33.9462440469749, 131.170918897489 33.9463882431753, 131.1707477971 33.9466161956193, 131.170519661359 33.9469370835372, 131.170126988932 33.9467261176002, 131.169978191931 33.9466427838583, 131.170175189544 33.9463612300224, 131.170336794 33.946114183612, 131.169983608752 33.9459384729859, 131.170042587389 33.9458672478482, 131.170119499248 33.9457729245157, 131.171030112597 33.9462440469749)) ^^http://www.opengis.net/ont/geosparql#wktLiteral