メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.245217286165 38.0357111235564, 138.244214778093 38.0359008247673, 138.243866450369 38.0359586292168, 138.243704739908 38.0359582756901, 138.243626314115 38.0356771048017, 138.24416950595 38.0356055086969, 138.244154031377 38.0354684954201, 138.244469669292 38.0354421538804, 138.244466351549 38.0354177889261, 138.244563238551 38.0354018126888, 138.244745906044 38.0353902417075, 138.245186749592 38.0354071090468, 138.245217286165 38.0357111235564)) ^^http://www.opengis.net/ont/geosparql#wktLiteral