メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.0062500 37.5833333, 140.0125000 37.5833333, 140.0125000 37.5875000, 140.0062500 37.5875000, 140.0062500 37.5833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral