メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.408839573967 43.8268032604404, 142.407162578247 43.8256044698087, 142.409664844184 43.8238234522284, 142.411278902316 43.8250195959367, 142.408839573967 43.8268032604404)) ^^http://www.opengis.net/ont/geosparql#wktLiteral