メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.0312500 33.4500000, 130.0375000 33.4500000, 130.0375000 33.4541667, 130.0312500 33.4541667, 130.0312500 33.4500000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral