メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((145.00272835696 43.5722109169097, 145.002724626718 43.5722139248492, 145.002720422381 43.5722108263834, 145.002610487255 43.5721330660585, 145.001306486089 43.5713125003708, 145.002755352248 43.5701520058401, 145.004152671465 43.5710592932149, 145.004112153086 43.5710912462892, 145.003600921226 43.5714940848175, 145.00272835696 43.5722109169097)) ^^http://www.opengis.net/ont/geosparql#wktLiteral