メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.352356272 43.1059964918045, 141.352340487911 43.1060584671247, 141.352240805573 43.1064494119711, 141.351553571612 43.1063644986532, 141.350890506877 43.106280966309, 141.350983835285 43.1058852594191, 141.351093737445 43.1054588093911, 141.352445671022 43.1056260730175, 141.352356272 43.1059964918045)) ^^http://www.opengis.net/ont/geosparql#wktLiteral