 The Corps of Engineers mapping output differs from general mapping agencies, such as the USGS, in that it is usually at a much larger scale (design/construction) and is project-specific; however, the mapping procedures used since World War II are not much different.Between 1949 and 1951, standardization of military mapping was agreed to between Canada, Great Britain and the US, and was expanded to NATO, SEATO and CENTO countries as well.This involved the application of the UTM to over 10,000 different maps covering 400,000 square miles and the printing of over 90,000,000 copies.