メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.808665351814 34.0590993026011, 131.808142467994 34.0593034500424, 131.806853845178 34.0598135818389, 131.806635781677 34.0594248205489, 131.80662550814 34.0594023913648, 131.80755125239 34.0590308044588, 131.807906761619 34.0589029469644, 131.807928202342 34.0589464003239, 131.808440595843 34.0587509569722, 131.808665351814 34.0590993026011)) ^^http://www.opengis.net/ont/geosparql#wktLiteral