メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.366143364898 43.0640183389862, 141.365858536394 43.0651562534916, 141.365465729108 43.0651035660169, 141.365365207699 43.0650900591315, 141.364477164625 43.0649504096365, 141.364554682614 43.0646417558034, 141.364615256949 43.0644005683768, 141.364758501528 43.0638301940269, 141.364813351048 43.0638379325261, 141.365457265757 43.0639252771825, 141.3657576388 43.0639660204234, 141.366143364898 43.0640183389862)) ^^http://www.opengis.net/ont/geosparql#wktLiteral