メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.357678309007 43.0945684333702, 141.358191159877 43.0946403662359, 141.358600989546 43.0946959518812, 141.358318240036 43.0958343850936, 141.357917546062 43.0957836531115, 141.357391387966 43.0957155546152, 141.35676075714 43.0956319402986, 141.357034389727 43.0944886540571, 141.357594983776 43.0945571642809, 141.357678309007 43.0945684333702)) ^^http://www.opengis.net/ont/geosparql#wktLiteral