メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.36301280198 43.1045619334108, 141.363393410979 43.1046053861336, 141.36388168705 43.1046638756711, 141.363750090728 43.1051689916542, 141.363679158811 43.1054943316256, 141.363188084294 43.1054298416545, 141.363154972867 43.1054295854332, 141.362807490101 43.1053783013327, 141.36233315353 43.1053179456848, 141.362444049097 43.1048116167627, 141.362520531697 43.1044944075315, 141.36301280198 43.1045619334108)) ^^http://www.opengis.net/ont/geosparql#wktLiteral