Water Resources Division, U.S. Geological Survey 1996 <p>Many people want maps that show an area of the United States as it existed many years ago. These are called historical maps, and there are two types.</p> <br/> <p>The most common type consists of special maps prepared by commercial firms to show such historical features as battle-fields, military routes, or the paths taken by famous travelers. Typically, these maps are for sale to tourists at the sites of historical events.</p> <br/> <p>The other type is the truly old map--one compiled by a surveyor or cartographer many years ago. Lewis and Clark, for example, made maps of their journeys into the Northwest Territories in 1803-6, and originals of some of these maps still exist.</p> application/pdf 10.3133/fs02494 en U.S. Geological Survey Looking for an old map reports