メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.406161856533 44.177350352999, 142.405267718461 44.1772019188409, 142.405308392176 44.176962400269, 142.40547455873 44.1763134375823, 142.405624639223 44.1764083186768, 142.405690453566 44.1764499447612, 142.405730494872 44.1764752555397, 142.406312453297 44.1768431682343, 142.406161856533 44.177350352999)) ^^http://www.opengis.net/ont/geosparql#wktLiteral