メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.883765660381 35.7176749396494, 139.882887619963 35.7174923822875, 139.882922905654 35.7173573142118, 139.883074935273 35.7167877468577, 139.883098488881 35.7168032470039, 139.88399454965 35.7169879290822, 139.88390808411 35.7172402549985, 139.883765660381 35.7176749396494)) ^^http://www.opengis.net/ont/geosparql#wktLiteral