メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.373446460145 43.7627214141146, 142.373741635968 43.7632682170977, 142.372214612854 43.7637119550515, 142.371911399935 43.763173313812, 142.37161970567 43.762648337873, 142.373171375515 43.7621921520717, 142.373446460145 43.7627214141146)) ^^http://www.opengis.net/ont/geosparql#wktLiteral