メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.262109423757 43.1186346784751, 141.26167038879 43.1189153041423, 141.260891754475 43.1193995560608, 141.260397524215 43.119690393202, 141.259607205484 43.1189990572406, 141.259552411367 43.1189617322484, 141.259202761486 43.1186457486911, 141.259057822374 43.1185188895545, 141.259837930868 43.1180263662902, 141.26032968358 43.1177391701649, 141.260747807641 43.1174870633109, 141.262109423757 43.1186346784751)) ^^http://www.opengis.net/ont/geosparql#wktLiteral