メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.8750000 34.3708334, 134.8812500 34.3708334, 134.8812500 34.3750000, 134.8750000 34.3750000, 134.8750000 34.3708334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral