メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.5500000 34.1791667, 132.5562500 34.1791667, 132.5562500 34.1833333, 132.5500000 34.1833333, 132.5500000 34.1791667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral