メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.385551390611 43.0404021701918, 141.385258311301 43.0405776124219, 141.385012622168 43.0407239428259, 141.384650072356 43.0409369780236, 141.383999290627 43.0400930166746, 141.384178985454 43.0399896534873, 141.384419010017 43.039830199893, 141.384688781168 43.0396621798042, 141.385551390611 43.0404021701918)) ^^http://www.opengis.net/ont/geosparql#wktLiteral