Historical information

This is a set of six photographs of stereoscopic equipment and personnel at the Army Survey Regiment, Fortuna, Bendigo, c1950s to c1960s. The stereoscopes shown in photos .1P and .2P were used to stereoscopically view and interpret features in overlapping aerial photographs. The stereoscopic plotters shown in photos .3P and .4P were used to stereoscopically plot topographic detail from overlapping aerial photographs using a pantograph arm with pencil onto a controlled plotting sheet. The Ryker Model PL-3 Wernstedt-Mahan type stereoscopic plotter shown in photos .5P and .6P was used for precision contouring, planimetry and profiling. It was a comparatively simple stereoscopic mapping instrument designed to use ordinary contact prints of aerial photographs. It provides for plotting on a constant scale and approximate tilt correction but does not provide refinements such as correction for lens distortion. The plotter in Photo .6P does not have its pantograph arm attached. These plotters pre-date the Wild B9 and B8 stereo plotters introduced in the 1960s.

Physical description

This is a set of six photographs of stereoscopic equipment and personnel at the Army Survey Regiment, Fortuna, Bendigo, c1950s to c1960s. Black and white photos are on photographic paper and were scanned at 300 dpi.
.1) - Photo, black & white, c1950s to c1960s, Universal Stereoscope, unidentified technician.
.2) - Photo, black & white, c1950s to c1960s, Old Delft Scanning Stereoscopes, unidentified technicians.
.3) - Photo, black & white, c1950s to c1960s, Unidentified stereoscopic plotters and technicians.
.4) - Photo, black & white, c1950s to c1960s, Unidentified stereoscopic plotter, CPL Bill Shapcott.
.5) and .6) - Photo, black & white, c1950s to c1960s, Ryker Model PL-3 stereoscopic plotter.

Inscriptions & markings

Photo .4P is annotated on back - ‘Bill Shapcott (CPL)’