メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.6375000 32.4333333, 131.6437500 32.4333333, 131.6437500 32.4375000, 131.6375000 32.4375000, 131.6375000 32.4333333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral