メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.280427213198 44.0203812758247, 144.280366112625 44.0204299654094, 144.28025265193 44.0205182063757, 144.27982997421 44.0208333523006, 144.279696354625 44.0209330346814, 144.279667797432 44.0209161860015, 144.278643034965 44.020784058825, 144.279243050395 44.0202401656062, 144.280427213198 44.0203812758247)) ^^http://www.opengis.net/ont/geosparql#wktLiteral