メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.776687872439 43.2094095327507, 141.777619124786 43.2098326029563, 141.777280227912 43.2102106270645, 141.776789903538 43.2107178511237, 141.775871515604 43.2102401118664, 141.774841164642 43.2097271592418, 141.775094507906 43.209417147091, 141.77566505185 43.208818906156, 141.776754998311 43.2093576962639, 141.776687872439 43.2094095327507)) ^^http://www.opengis.net/ont/geosparql#wktLiteral