メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.394160588224 43.8090211836044, 142.393085968289 43.8097901206623, 142.392736765445 43.8100589202439, 142.392389609511 43.8103262040051, 142.392009317022 43.810578549331, 142.391637331968 43.8108548596812, 142.39038067392 43.8099388649868, 142.390014547005 43.8096608329038, 142.391445025457 43.8086106742448, 142.39250802371 43.807838179792, 142.393637214248 43.8086417601853, 142.394160588224 43.8090211836044)) ^^http://www.opengis.net/ont/geosparql#wktLiteral