メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.34712211928 43.7808546627997, 142.347197218161 43.7812499129158, 142.346603306717 43.7813447269814, 142.346389304594 43.781439124797, 142.346240318147 43.7815362090861, 142.345740760223 43.7811763778364, 142.345344633779 43.7808819609397, 142.345525865339 43.779585774325, 142.345866555223 43.7795313884223, 142.347510431055 43.7791721532384, 142.347592571423 43.779151845954, 142.347802162779 43.7807854905542, 142.347803462356 43.7807978309919, 142.34712211928 43.7808546627997)) ^^http://www.opengis.net/ont/geosparql#wktLiteral