メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.771729378403 43.1946183595716, 141.772200530607 43.19485796086, 141.771586656122 43.1954920828716, 141.771127712519 43.1952642037684, 141.770649446457 43.1950245622019, 141.771090390228 43.1945898121449, 141.771268714923 43.1943840050649, 141.771729378403 43.1946183595716)) ^^http://www.opengis.net/ont/geosparql#wktLiteral