メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.370559952533 43.0986345359941, 141.370495729663 43.0989169637804, 141.370420450072 43.099254230582, 141.370313582573 43.0996927355595, 141.369686236971 43.0996168164356, 141.369226091327 43.0995599715455, 141.368686409639 43.0994880964666, 141.368787155313 43.0990689544357, 141.368878684093 43.0987301953499, 141.368949145087 43.0984082226192, 141.370567223583 43.0986026636737, 141.370559952533 43.0986345359941)) ^^http://www.opengis.net/ont/geosparql#wktLiteral