メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.2437500 34.0208334, 134.2500000 34.0208334, 134.2500000 34.0250000, 134.2437500 34.0250000, 134.2437500 34.0208334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral