メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.83764386574 43.0792171391041, 142.837611214625 43.0792941071701, 142.83732910151 43.0799883812145, 142.837226506595 43.079965347999, 142.836750796427 43.0798584287087, 142.836056245811 43.0797023455666, 142.836135879578 43.0795211173959, 142.836327748292 43.079071285908, 142.836581600643 43.0784763245068, 142.836719414185 43.0781586388363, 142.837874806639 43.0784298004039, 142.837968465612 43.0784517529242, 142.837662116088 43.079174072917, 142.83764386574 43.0792171391041)) ^^http://www.opengis.net/ont/geosparql#wktLiteral