メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.0250000 41.7083333, 140.0312500 41.7083333, 140.0312500 41.7125000, 140.0250000 41.7125000, 140.0250000 41.7083333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral