メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.878273530582 43.3389065581614, 141.878485494184 43.3396233283255, 141.876015265919 43.3400018079543, 141.875280795883 43.3401071476584, 141.875078945269 43.3401360949869, 141.874930893653 43.3396310780607, 141.874856574899 43.3393579627156, 141.874782287081 43.3391073523744, 141.874628889675 43.3386343172349, 141.878038427405 43.3381065145509, 141.878214847553 43.3387060729229, 141.878273530582 43.3389065581614)) ^^http://www.opengis.net/ont/geosparql#wktLiteral