メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.6750000 34.4708334, 132.6812500 34.4708334, 132.6812500 34.4750000, 132.6750000 34.4750000, 132.6750000 34.4708334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral