メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.342755044044 43.0298243343797, 141.343545761761 43.029887778912, 141.343536334763 43.0299616219794, 141.343443115288 43.030693865514, 141.341482671751 43.0305624837782, 141.341573948097 43.0297361236751, 141.341962357557 43.0297644543649, 141.342379383617 43.0297959661712, 141.342755044044 43.0298243343797)) ^^http://www.opengis.net/ont/geosparql#wktLiteral