メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.9062500 33.3083333, 130.9125000 33.3083333, 130.9125000 33.3125000, 130.9062500 33.3125000, 130.9062500 33.3083333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral