メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.432304796403 43.0978546163668, 141.43364550382 43.0989232895957, 141.431971920339 43.1000960212345, 141.431543574183 43.100249154962, 141.430793272669 43.0993401194603, 141.430512384546 43.0989999628613, 141.430367125733 43.0988240114981, 141.430002740888 43.0984411278197, 141.429751460439 43.0981770674758, 141.429120989495 43.0975260067476, 141.430050794055 43.0971613414854, 141.430632808652 43.0969331465643, 141.430943833633 43.0968111024305, 141.431780224326 43.0974364126276, 141.432304796403 43.0978546163668)) ^^http://www.opengis.net/ont/geosparql#wktLiteral