メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.375829650314 43.0730953169275, 141.375761416414 43.0732320084641, 141.37535602463 43.0730817138896, 141.375070919765 43.0736542660656, 141.374732203833 43.0736115899373, 141.374506544299 43.0735726606757, 141.374004411446 43.0735059456138, 141.37370072492 43.0734693011606, 141.373411691224 43.0734276341436, 141.374176980137 43.0726180215587, 141.374212879819 43.0725896018028, 141.374516192005 43.0723490047014, 141.375829650314 43.0730953169275)) ^^http://www.opengis.net/ont/geosparql#wktLiteral