メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.361507898419 43.1046819255218, 141.361942195012 43.1047429582962, 141.362444049097 43.1048116167627, 141.36233315353 43.1053179456848, 141.36213943242 43.1061019817996, 141.361627793449 43.1060321922107, 141.36119209994 43.1059741712093, 141.360666827981 43.1058982233332, 141.36097298891 43.1046028102889, 141.361507898419 43.1046819255218)) ^^http://www.opengis.net/ont/geosparql#wktLiteral