メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.9375000 34.1583333, 130.9437500 34.1583333, 130.9437500 34.1625000, 130.9375000 34.1625000, 130.9375000 34.1583333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral