メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.657181131758 39.1802339077796, 140.657718917636 39.1809356733522, 140.657784819562 39.181047249654, 140.656769013089 39.1815194222621, 140.65616212673 39.1806775673281, 140.657181131758 39.1802339077796)) ^^http://www.opengis.net/ont/geosparql#wktLiteral