メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.894649586991 43.0105993124835, 142.894388658612 43.0108221081964, 142.894368036469 43.0107379684979, 142.894121263524 43.0099129068485, 142.894677572122 43.0098392397367, 142.894376465557 43.0096652472046, 142.894878542461 43.0092262377776, 142.895578353442 43.0096556732442, 142.895680785893 43.0097185344135, 142.895684692627 43.0097209745287, 142.895509404961 43.0098711314372, 142.894649586991 43.0105993124835)) ^^http://www.opengis.net/ont/geosparql#wktLiteral