メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.857324332266 37.4489373230862, 138.857842708804 37.4502685116965, 138.857060542668 37.4504471706563, 138.85644763943 37.4506078509876, 138.855970002139 37.4507205277714, 138.855361191833 37.4508652804856, 138.854986450307 37.4496099575097, 138.854958098942 37.4495051509059, 138.854779215613 37.4486309291181, 138.855220233969 37.4484782407984, 138.855685844771 37.4483498328241, 138.855725438355 37.4483439404485, 138.855874972194 37.4483222268326, 138.856052173624 37.4482978952378, 138.856059567596 37.4482970275855, 138.856400654657 37.4482569914082, 138.857127316623 37.4481452444162, 138.857401932506 37.4489163905784, 138.857324332266 37.4489373230862)) ^^http://www.opengis.net/ont/geosparql#wktLiteral