メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.371911399935 43.763173313812, 142.372214612854 43.7637119550515, 142.371303051076 43.7639866068263, 142.370695644366 43.7641592533719, 142.370401798147 43.7636170329948, 142.370394190018 43.7636035743802, 142.370104535283 43.7630911994785, 142.37161970567 43.762648337873, 142.371911399935 43.763173313812)) ^^http://www.opengis.net/ont/geosparql#wktLiteral