メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.327190536873 43.762778637644, 142.327601606564 43.7629112664472, 142.326939119132 43.7640064616541, 142.326574522928 43.7638953698147, 142.326534289756 43.7638830733232, 142.325805580571 43.7636604291145, 142.326453358346 43.7625477930497, 142.326867821559 43.7626853279236, 142.327190536873 43.762778637644)) ^^http://www.opengis.net/ont/geosparql#wktLiteral