メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.370378341624 43.0812743401248, 141.370937168259 43.0813522660949, 141.371253811269 43.0813977387968, 141.371095197563 43.0824710758125, 141.370216803943 43.0823498325677, 141.369671776648 43.0822793223362, 141.36973265451 43.0819012814585, 141.369742760753 43.0818388369609, 141.369850314803 43.0812031873717, 141.370276451548 43.0812606166885, 141.370378341624 43.0812743401248)) ^^http://www.opengis.net/ont/geosparql#wktLiteral