メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.861176073576 43.332446816093, 141.860532094113 43.3325474523072, 141.860444667188 43.3322540987161, 141.860354035011 43.331949974075, 141.86013390686 43.3312131035116, 141.860804461001 43.3311127002954, 141.861176073576 43.332446816093)) ^^http://www.opengis.net/ont/geosparql#wktLiteral