メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.995873133409 37.7268679098331, 138.995033121871 37.7274833023751, 138.994885783154 37.7273025838367, 138.99466016452 37.7270242039294, 138.994353344085 37.7265483552296, 138.994149973788 37.7261828730301, 138.994073365753 37.7259963663478, 138.995271995424 37.7256376838326, 138.995421754327 37.7261032080695, 138.995825455949 37.7268078514842, 138.995873133409 37.7268679098331)) ^^http://www.opengis.net/ont/geosparql#wktLiteral