メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.324314640419 43.0973036293686, 141.324693869802 43.0977338741236, 141.325202627851 43.0983388066976, 141.32472727524 43.0986892720317, 141.32421001433 43.0990690735742, 141.323583415981 43.0982597225246, 141.323230908773 43.0977888299107, 141.323121022917 43.0976742180751, 141.323401895687 43.0975493427171, 141.323740811825 43.0972793576153, 141.324088606019 43.0970440453228, 141.324314640419 43.0973036293686)) ^^http://www.opengis.net/ont/geosparql#wktLiteral