メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.976345506423 43.5498606702085, 144.975492398789 43.549196407569, 144.976368724643 43.5485714247084, 144.976638293547 43.5487091782207, 144.97757466613 43.5489563187718, 144.976345506423 43.5498606702085)) ^^http://www.opengis.net/ont/geosparql#wktLiteral