メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.3812500 37.5083333, 140.3875000 37.5083333, 140.3875000 37.5125000, 140.3812500 37.5125000, 140.3812500 37.5083333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral