メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.390699002514 44.1726540293158, 142.388680117356 44.1723414443404, 142.388647704186 44.1721692958669, 142.388469232492 44.1712213775563, 142.391004666041 44.1716247457948, 142.390882070677 44.1720186336119, 142.390869423191 44.172097177005, 142.390699002514 44.1726540293158)) ^^http://www.opengis.net/ont/geosparql#wktLiteral