メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.340486660983 43.7681429020338, 142.340667639594 43.7684455064942, 142.340941722229 43.7689274245794, 142.339559644258 43.7693293656045, 142.339288592702 43.7688584635799, 142.339127201428 43.7685367311149, 142.33843686218 43.7673243602552, 142.339538968445 43.7670686794828, 142.339878062912 43.7669900184196, 142.340068405951 43.7673811684448, 142.340486660983 43.7681429020338)) ^^http://www.opengis.net/ont/geosparql#wktLiteral