REPUBLIC OF SOUTH AFRICA 
NATIONAL REPORT 
1968—72 
XII INTERNATIONAL CONGRESS 
OTTAWA 1972 
This report has been compiled by the Council. of thé Photogrammetric 
Society of South Africa. It includes information supplied from its 
Rhodesian Branch. 
COMMISSION I. PHOTOGRAPHY & NAVIGAT | ON 
  
  
RAPPORT EUR: Mr. P.M. Smuts 
During the past four years an area of nearly one million square kilo- 
metres was photographed for governmental bodies. The scale of photograph 
varied from 1/20 000 to 1/60 000. The small scale photography is used 
primarily for the production of 1/50 000 topographic maps whilst the 
larger scale photography is used by the Department of Agriculture and 
Census as well as by many private users. All this photography was taken 
by private air survey companies making use of I2 so-called distortion 
free 150mm focal length cameras and 10 super-wide angled 88mm focal length 
cameras. Limited use was made of colour and false colour photography for 
agricultural research and forestry purposes. 
Research was undertaken in the field of optical transfer functions by the 
Council of Scientific and Industrial Research which body completed a 
circular questionnaire for the Secretary of Commission | of the Internat- 
ional Society of Photogrammetry. 
There is no record of any research work in the fields of airborne or 
photographic equipment, image location, image quality, navigation equip- 
ment or stereoscopy. 
COMMISSION 1l. THEORY, METHODS AND RESTITUTION OF INSTRUMENTS 
RAPPORTEUR: Professor L. Eekhout 
Since 1968 the number of photogrammetric instruments in use in the 
Republic of South Africa ‘and Rhodesia has increased as follows: 
Universal Instruments +... +. =». » 5 
Précision Plotters . . . +. + + … IO 
Topo Ploiters « . … + + »# + + +» 16 
Orthophoto Equipment. . . ++. + » > 
The main progress made ‘under this heading is in the production of Ortho- 
photo maps. Two of the.new production centres are using the Zeiss Gigas 
GZ-| Orthoprojectors connected directly to the Planimaf. No automated 
correlators or storage profilers are in use. The third instrument is the 
Topocart connected to the Orthophot.