メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.340309311867 43.0851906655507, 141.340603843774 43.0852387941611, 141.340638413801 43.0852434289412, 141.341077871965 43.0853020625249, 141.340989723848 43.0856567340058, 141.340898409054 43.0860243201025, 141.340725815997 43.0867099896006, 141.339974640205 43.0866040997139, 141.339948001781 43.0866003443929, 141.339830517802 43.0865834445906, 141.339740296299 43.0865720361136, 141.33922971905 43.0865076258849, 141.339420420433 43.0858247764029, 141.339587466113 43.0850932791177, 141.340309311867 43.0851906655507)) ^^http://www.opengis.net/ont/geosparql#wktLiteral