メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.322521076243 43.057520694714, 141.322803489268 43.0575614544427, 141.322714534663 43.0578825592387, 141.322670001671 43.0581007814665, 141.322585965034 43.0584772044317, 141.322394906118 43.0592466723491, 141.321046895905 43.0590606117779, 141.321201766334 43.0584212421183, 141.321275403181 43.0581052181141, 141.321356780175 43.0577784265883, 141.321367211991 43.0576910214687, 141.321451485622 43.0573755772976, 141.322388394181 43.0575042870571, 141.322521076243 43.057520694714)) ^^http://www.opengis.net/ont/geosparql#wktLiteral