メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.334445166493 43.0429164155583, 141.334419170654 43.0431814922079, 141.33441685117 43.0432085505288, 141.33434276253 43.0436384465069, 141.334312307048 43.0438228887093, 141.333522270277 43.0437794990464, 141.333238005732 43.0437639302174, 141.33262808937 43.0437304178535, 141.332710102348 43.0430590741154, 141.33274967864 43.0428097202067, 141.332802369224 43.042368681787, 141.334492165731 43.0424962195128, 141.334504519083 43.0425359839634, 141.334445166493 43.0429164155583)) ^^http://www.opengis.net/ont/geosparql#wktLiteral