DescriptionOregoncountry.png English: en:Oregon Country and the border dispute between the U.S. and Britain, 1818-1846. Date 5 April 2006 Source Own work
Date 25 March 2010 Source English: Own work with data from File:Oregoncountry.png by User:Kmusser; Coast : NASA Shuttle Radar Topography Mission (SRTM3