メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.9312500 33.6583333, 130.9375000 33.6583333, 130.9375000 33.6625000, 130.9312500 33.6625000, 130.9312500 33.6583333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral