with precise satellite ephemerides (station coordinates computed using program DOPPLR at Directorate of Survey – Army in Canberra ACT), to replace geodetic astronomy for absolute positioning and Aerodist airborne EDM; the Australian developed WREMAPS II airborne laser terrain profile recorder to replace terrain heighting by barometry for 1:100,000 mapping; grid and graticule production on Footscray Ammunition Factory's Gerber flatbed plotter 1975: AUTOMAP 1 computer assisted cartography and mapping system (Input Sub-System of four Wild B8s and three Gradicon digitising tables, Optical Line Following Sub-System – Gerber OLF, Verification Sub-System – Gerber 1442 drum plotter, General Purpose Sub-system – HP21MX computer and Output Sub-System – Gerber 1232 flatbed plotter), the first map was published in 1978 (Strickland 3665-3, 1:50,000) 1977: PDP 11/70 computer and OMI/C-3T and AP/C-4 analytical plotters 1978: new cartographic specifications (SYMBAS Symbolisation All Scales) for map and air chart production by digital cartographic methods 1982: Schut's Bundle analytic adjustment was set up on the PDP 11/70 to augment the Schut polynomial strip adjustment of block air photography triangulation; Magnavox MX1502 second generation TRANSIT receivers for relative positioning 1983: Kongsberg flatbed plotter for air triangulation output and associated grids 1983–1984: AUTOMAP 2-second generation computer assisted cartography and mapping system as a precursor to collection of digital geographic information and creation of Geographic Information Systems in support of emerging digital military systems. Supplied by Intergraph Pty Ltd it comprised; superimposition of compiled graphics in the optical train of Wild B8 stereoplotters, dual screen interactive graphic edit workstations, raster scanner/plotter, VAX computers (the first map published was De Grey 2757 1:100,000 including screens and stipples) 1986–1988: Texas Instruments TI4100 portable Global Positioning System (GPS) geodetic receivers and Ferranti FILS3 helicopter and vehicle mounted Inertial Positioning System to replace TRANSIT satellite receivers 1988–1990: established the baseline for a GPS controlled air camera and photogrammetric system to significantly reduce the requirement for ground survey to accurately control air photography for topographic mapping 1988–1992: adopted the World Geodetic System 1984 (WGS84 – used by GPS) as the reference framework and spheroid for all military geospatial products of Australia and the rest of the world. In 1994 the Australian Government adopted the Geodetic Datum Australia 1994 which for practical purposes is coincident with the World Geodetic System 1984 (WGS84). The associated map grids remain based on the Transverse Mercator projection. 1990: Heidelberg Speedmaster 102 five colour printing press; AUTOMAP 2 upgrade to increase storage capacity