Historical information

This collection of 19 photos was most likely taken in 1979 in Air Survey Squadron. The PDP 11/70 minicomputer shown photos .2P to .3P was the operating system introduced in 1977 as the mainframe system for the control of the APC4, aerial triangulation block adjustments, SORA OP Analytical Orthophoto control, APR Analytical Terrain Profile Recorder computation, graphics, and general computing. The Zeiss (Jena) Stecometer analytic stereocomparator for air photography shown in photos .5P to .9P was introduced at Air Survey Squadron in 1963. Aerotriangulation production was expedited using computers for analytical photogrammetric processes. The technician accurately measured between pass, tie, and survey control points on aerial photographs. The OMI/Nistri AP/C-3 analytical plotter shown in photos .10P and .11P was introduced in 1972–1973. Photo .11P shows a coordinatorgraph attached to the AP/C-3. The Zeiss D2 Planimat Stereoplotter shown in photo .12P was used for analytical orthophoto control. Wild PUG4 point transfer devices shown in photos .17P to .19P were introduced in c1968 superseding the PUG2 devices. PUG4 devices were used by technicians to stereoscopically view the photography containing the survey control points and the mapping aerial photography. The Control points were transferred from the control photography to the mapping diapositives of aerial photography by drilling their locations into the photographic emulsion.

Physical description

This is a set of 19 photographs of Air Survey Squadron personnel operating aerotriangulation equipment at the Army Survey Regiment at Fortuna, Bendigo, c1979. Black and white photos are on photographic paper and were scanned at 300 dpi. They are part of the Army Survey Regiment’s Collection.
.1) - Photo, black & white, c1979, Aerotriangulation tasks, unidentified technicians.
.2) to .3) - Photo, black & white, c1979, PDP-11 minicomputers tasks, unidentified technician.
.4) - Photo, black & white, c1979, Aerotriangulation tasks, unidentified technician.
.5) - Photo, colour, c1979, Zeiss (Jena) Stecometer, unidentified technician.
.6) to.9) - Photo, black & white, c1979, Zeiss (Jena) Stecometer, unidentified technician.
.10) - Photo, black & white, c1984, OMI/Nistri APC/3-1 analytical stereoplotter, SPR Kristin (Isaac) Skidmore.
.11) - Photo, colour, c1979, OMI/Nistri APC/3-1 analytical stereoplotter, unidentified technician.
.12) - Photo, colour, c1979, Zeiss D2 Planimat Stereoplotter, unidentified technician.
.13) - Photo, black & white, c1979, Aerotriangulation tasks, unidentified technician.
.14) - Photo, black & white, c1979, Aerotriangulation tasks, unidentified technician.
.15) - Photo, black & white, c1979, Aerotriangulation tasks, CPL Ken Talbot-Smith
.16) - Photo, black & white, c1979, Aerotriangulation tasks, SPR David Jobe.
.17) - Photo, black & white, c1979, Wild PUG4 point transfer device, WO2 Brian Mead.
.18) - Photo, black & white, c1979, Wild PUG4 point transfer device, CPL Andy Wilson.
.19) - Photo, black & white, c1979, Wild PUG4 point transfer device, unidentified technician.

Inscriptions & markings

.5P is annotated ‘OMI-Nistri AP/C Analytical Plotter’ and ’Topo 36’.
.12P is annotated ‘Zeiss Jena Stecometer Stereocomparator’ and ’Topo 35’.
There are no annotations on the other photos.