メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.343763395353 43.772683807501, 142.34398226586 43.7730524782028, 142.344026020859 43.7731261744965, 142.34282168002 43.7734584595797, 142.342592297951 43.7730615613561, 142.34200555629 43.7727706311464, 142.34207981401 43.7726839693243, 142.342823071303 43.7718956688071, 142.343257069374 43.7721147656829, 142.343550744251 43.7723380732701, 142.343763395353 43.772683807501)) ^^http://www.opengis.net/ont/geosparql#wktLiteral