メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.4812500 33.5708334, 133.4875000 33.5708334, 133.4875000 33.5750000, 133.4812500 33.5750000, 133.4812500 33.5708334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral