メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.028498076495 43.1665989278775, 143.026217761745 43.1669467261607, 143.025118989294 43.1671611533725, 143.024848260933 43.1663513284307, 143.024588592489 43.1655305272621, 143.02794762326 43.1650336484836, 143.028498076495 43.1665989278775)) ^^http://www.opengis.net/ont/geosparql#wktLiteral