メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.6000000 34.6041667, 132.6062500 34.6041667, 132.6062500 34.6083333, 132.6000000 34.6083333, 132.6000000 34.6041667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral