メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.5750000 34.5875000, 132.5812500 34.5875000, 132.5812500 34.5916667, 132.5750000 34.5916667, 132.5750000 34.5875000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral