メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.763043358256 43.1724566989161, 141.762590375687 43.1729263880539, 141.761818175059 43.1737409405697, 141.761345723701 43.1742216554015, 141.761109393791 43.174474671422, 141.760961946231 43.1737986700145, 141.760681892379 43.1724966642869, 141.760503721239 43.1717767155543, 141.760208977935 43.1706563735116, 141.760248217658 43.1706757436044, 141.763295496164 43.1722013552169, 141.763043358256 43.1724566989161)) ^^http://www.opengis.net/ont/geosparql#wktLiteral