メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.2375000 36.0083333, 140.2437500 36.0083333, 140.2437500 36.0125000, 140.2375000 36.0125000, 140.2375000 36.0083333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral