メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.3125000 32.1083333, 130.3187500 32.1083333, 130.3187500 32.1125000, 130.3125000 32.1125000, 130.3125000 32.1083333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral