メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.349532075858 43.0422151943008, 141.350633861359 43.042288846205, 141.350587997599 43.0426323994842, 141.350548221191 43.0429595435732, 141.350544400779 43.0429913733952, 141.350459449742 43.0435228220733, 141.350455960219 43.0436304705189, 141.348743795023 43.0434937774947, 141.348839481961 43.0428391252177, 141.348872670151 43.0425040528366, 141.348908574098 43.0421735029421, 141.349532075858 43.0422151943008)) ^^http://www.opengis.net/ont/geosparql#wktLiteral