Defense Mapping Agency Technical Manual 8358.1 Datums, Ellipsoids, Grids, and Grid Reference Systems

This manual describes the basic principles of the Military Grid Reference System and the nonstandard reference systems. It describes the method for determining references on maps and charts at scales of 1:1,000,000 and larger. It contains identifications for the grid zone designations and for the 100,000 meter squares of the Universal Transverse Mercator Grid and the Universal Polar Sterographic Grid. It also contains the specifications and grid identifications for the various non-standard grids. It provides diagrams and textual information for delineating geodetic datums and ellipsoids. Subject Terms: Position location, military grid, geodetic datum, coordinate reference system, ellipsoid, spheroid, graticule, chart, projection. DEFENSE MAPPING AGENCY MISSION: To enhance national security and support the Office of the Secretary of Defense, the Joint Chiefs of Staff, Unified and Specified Commands, Military Departments, and other users, by producing and distributing timely and tailored mapping, charting, and geodetic products, services, and training, and advising on such matters. To provide nautical charts and marine navigational data to worldwide merchant marine and private vessel operators. To maintain liaison with civil agencies and other national and international scientific and other mapping, charting, and geodetic activities. DEFENSE MAPPING AGENCY 8613 LEE HIGHWAY FAIRFAX, VIRGINIA 22031-2137