メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.938334436544 43.619469883611, 141.938200145241 43.6195037598846, 141.935594400889 43.6201465412301, 141.93528057631 43.6195154203408, 141.935797336199 43.6193587706126, 141.938000337241 43.6187905036929, 141.938112231605 43.6190180327514, 141.938334436544 43.619469883611)) ^^http://www.opengis.net/ont/geosparql#wktLiteral