メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.0187500 34.8708334, 132.0250000 34.8708334, 132.0250000 34.8750000, 132.0187500 34.8750000, 132.0187500 34.8708334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral