メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((145.003795755759 43.5729154495246, 145.00374894826 43.5729536709732, 145.003138043442 43.5734533124977, 145.00208070547 43.57275732063, 145.002720422381 43.5722108263834, 145.002724626718 43.5722139248492, 145.00272835696 43.5722109169097, 145.003795755759 43.5729154495246)) ^^http://www.opengis.net/ont/geosparql#wktLiteral