メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.17469471162 34.8329010750397, 138.174827794028 34.833493725807, 138.174869979861 34.833705332028, 138.174414744158 34.8337677871106, 138.174348752283 34.8334679413819, 138.17361113533 34.8334446345601, 138.173540967209 34.8328959566567, 138.17347979328 34.8324231527672, 138.174112305068 34.8323191995057, 138.174568838665 34.832250409908, 138.17469471162 34.8329010750397)) ^^http://www.opengis.net/ont/geosparql#wktLiteral