メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.290655027454 43.1185693434793, 141.289200319695 43.119323665173, 141.28812889119 43.1183026384157, 141.287967260774 43.1181410013843, 141.289401586004 43.11738146279, 141.290039180874 43.1179856581104, 141.290655027454 43.1185693434793)) ^^http://www.opengis.net/ont/geosparql#wktLiteral