メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.754696674554 43.2000670637041, 141.75467880307 43.2000854585352, 141.754429252188 43.2003458603087, 141.753556104863 43.2012502253891, 141.752682229916 43.2007549114732, 141.753265599642 43.2001639437202, 141.753503244686 43.1999081352521, 141.753788675712 43.1996035857847, 141.753791162503 43.199600852747, 141.754184341683 43.1997987324879, 141.754531612888 43.1999731529412, 141.754696674554 43.2000670637041)) ^^http://www.opengis.net/ont/geosparql#wktLiteral