メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.5500000 33.5750000, 130.5562500 33.5750000, 130.5562500 33.5791667, 130.5500000 33.5791667, 130.5500000 33.5750000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral