メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.359222069249 43.0762211011468, 141.359916540427 43.0763224321576, 141.35962978225 43.0774616512413, 141.358943844868 43.0773665041376, 141.358069945338 43.0772461077888, 141.358362483595 43.0761070823704, 141.359222069249 43.0762211011468)) ^^http://www.opengis.net/ont/geosparql#wktLiteral