メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.6062500 33.4083333, 130.6125000 33.4083333, 130.6125000 33.4125000, 130.6062500 33.4125000, 130.6062500 33.4083333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral