メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.447543908307 43.8079580894458, 142.447869269372 43.8081572704282, 142.448222958442 43.8083738046183, 142.448684132268 43.8086679062594, 142.449155100045 43.8089605649779, 142.449218043013 43.809003087228, 142.449045419459 43.8091486693619, 142.448463335609 43.8096395676338, 142.447961672963 43.8100626398034, 142.447480073723 43.8097567209147, 142.44697079427 43.8094332157964, 142.446929640403 43.8094600259793, 142.446562365606 43.8092400305641, 142.446243390708 43.8090489573782, 142.445876194373 43.8088289939197, 142.447179461698 43.8077349614259, 142.447543908307 43.8079580894458)) ^^http://www.opengis.net/ont/geosparql#wktLiteral