メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.377972839631 43.7614146178273, 142.378258441777 43.7619499407317, 142.378267100594 43.7619661575228, 142.377933206743 43.7620594069956, 142.377414195692 43.7622072865826, 142.376754716495 43.7623908493797, 142.376600642398 43.7621068489488, 142.376464940193 43.7618439071315, 142.376177022158 43.7613134703495, 142.376598699487 43.7611931090006, 142.377668679155 43.7608877003447, 142.377972839631 43.7614146178273)) ^^http://www.opengis.net/ont/geosparql#wktLiteral