メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.26672972724 44.0181162303735, 144.265968723403 44.0181163688876, 144.265526803127 44.0181241783874, 144.26509493857 44.0181353907887, 144.26511159447 44.0180345953122, 144.265148298597 44.0178238807631, 144.266346822037 44.0179104385036, 144.266349370194 44.0178476769371, 144.26659613394 44.0178433146173, 144.266551898571 44.0179524734722, 144.26672972724 44.0181162303735)) ^^http://www.opengis.net/ont/geosparql#wktLiteral