メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.497895146852 40.4704238641631, 141.497819242891 40.4706394648945, 141.49713069493 40.4704828337835, 141.496863785485 40.4704254790867, 141.496498411028 40.4703419167312, 141.496284712934 40.4699951402855, 141.496220787115 40.469738971526, 141.496713613323 40.4697148189325, 141.496738708247 40.4697230466522, 141.496879557058 40.4700018851372, 141.497340932215 40.4699972937458, 141.497435711727 40.4699019017913, 141.497867578196 40.4699038798927, 141.49787715386 40.470131758627, 141.497886160631 40.4703395172129, 141.497895146852 40.4704238641631)) ^^http://www.opengis.net/ont/geosparql#wktLiteral