メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.7750000 32.0500000, 130.7812500 32.0500000, 130.7812500 32.0541667, 130.7750000 32.0541667, 130.7750000 32.0500000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral