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A number of US Geological Survey employees were assigned to the US Army Corps of Engineers 29th Engineers, a map organization, during World War I. Major G.S. Smith commanded part of the 29th Engineers, a map making and topographical unit, with 53 officers and 146 men transferred from the US Geological Survey.
The Engineer Topographic Battalion's wartime mission was the development of accurate 4-color topographic maps created through timely survey work, drafting, printing, and distribution of military maps as required by the Allied Armed Forces of the United States. The Battalion was first formed in December 1943 and deactivated in December 1946.
GeoPDF products are used to deliver maps and imagery from multiple US government agencies. Quadrangles of The National Map are available from the USGS store in as GeoPDF products and are free to download. The US Army Corps of Engineers distributes GeoPDF maps through the U.S. Army Corps of Engineers Topographic Engineering Center.
The Army Geospatial Center (AGC) [2] (formerly Topographic Engineering Center (TEC)) is a Major Subordinate Command of the United States Army Corps of Engineers. [3] It is located in Alexandria, Virginia, within the Humphreys Engineering Center adjacent to the Fort Belvoir military reservation.
The U.S. Army Corps of Topographical Engineers was a branch of the United States Army authorized on 4 July 1838. It consisted only of officers who were handpicked from West Point [ 1 ] and was used for mapping and the design and construction of federal civil works such as lighthouses and other coastal fortifications and navigational routes.
This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
The ERP was the predecessor organization to the Army Map Service, Army Topographic Command, Defense Mapping Agency and now National Geospatial-Intelligence Agency. Before 1917, there was little concern or interest in the United States for maps of foreign countries. In 1917 America entered into World War I as a major ally in Europe.
United Nations Cartographic Section has many free maps in PDF format, at least some with the layers intact. However most UN maps are under UN copyright, so check before uploading. See here for their policy, this page about requesting permission. USGS Maps. Every USGS topographic map available for free download from the Internet Archive.