メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.616379228275 42.8633489572189, 141.616979887229 42.8642617123907, 141.617098096535 42.864441340248, 141.614239285354 42.8655100560928, 141.61398585887 42.8655943959881, 141.612964705946 42.8640283269223, 141.613110531234 42.8639729034393, 141.613187374991 42.8639443735697, 141.61430629996 42.8635289372402, 141.615437102763 42.8631090735137, 141.616067371297 42.8628750495855, 141.616379228275 42.8633489572189)) ^^http://www.opengis.net/ont/geosparql#wktLiteral