メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.360475688105 43.0805027654113, 141.360460339948 43.0805422417283, 141.360391686921 43.0807910230782, 141.360312152375 43.0810954200525, 141.359785811509 43.0810213508668, 141.358768194538 43.0808901469645, 141.358911410181 43.0803234997681, 141.359060114018 43.0797355146663, 141.359606766455 43.0797975075243, 141.360060149075 43.0798604598036, 141.360623917472 43.0799332708422, 141.360475688105 43.0805027654113)) ^^http://www.opengis.net/ont/geosparql#wktLiteral