メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.882197246244 38.7416442860484, 139.882364131276 38.7418336983261, 139.881836888613 38.7420636362734, 139.88178284864 38.741795047954, 139.882197246244 38.7416442860484)) ^^http://www.opengis.net/ont/geosparql#wktLiteral