メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.9375000 34.9875000, 138.9437500 34.9875000, 138.9437500 34.9916667, 138.9375000 34.9916667, 138.9375000 34.9875000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral