メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.355428470183 43.107270794055, 141.355341470429 43.1076749167723, 141.353778033936 43.1074623770191, 141.353882609303 43.1070711900166, 141.353988818696 43.1066731943379, 141.355525221334 43.1068560586799, 141.355428470183 43.107270794055)) ^^http://www.opengis.net/ont/geosparql#wktLiteral