メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.187839548489 34.8087217318509, 137.188370226959 34.8104911972736, 137.18742255662 34.810484040165, 137.186119131999 34.8087337173198, 137.186835341012 34.8089012153466, 137.187060892177 34.808924698936, 137.18726580671 34.808890858467, 137.187839548489 34.8087217318509)) ^^http://www.opengis.net/ont/geosparql#wktLiteral