メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.130232678269 36.2418366430735, 139.129612532819 36.2417260834826, 139.129674896336 36.2414243652277, 139.1297165003 36.2412232150503, 139.130307983742 36.2414186441429, 139.130232678269 36.2418366430735)) ^^http://www.opengis.net/ont/geosparql#wktLiteral