メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.356542749145 43.0492948554899, 141.356475578153 43.0495489957993, 141.356327627061 43.0501161057245, 141.35583558875 43.0500490437712, 141.355662797092 43.0500254918098, 141.354780708888 43.0499052600539, 141.354911394784 43.0493658663914, 141.355037489667 43.0488450757142, 141.356603350521 43.0490638733686, 141.356542749145 43.0492948554899)) ^^http://www.opengis.net/ont/geosparql#wktLiteral