メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.341245220071 43.0325501725992, 141.34115528211 43.0332007867072, 141.340430969952 43.0331496691299, 141.339149375629 43.033059157421, 141.339184777246 43.0327527288398, 141.339237761844 43.0324112043546, 141.339264848608 43.0321808067169, 141.339326293865 43.0317533362997, 141.33980544524 43.0317854913918, 141.341329100955 43.03188769386, 141.341245220071 43.0325501725992)) ^^http://www.opengis.net/ont/geosparql#wktLiteral