13th International Congress for Photogrammetry 
  
  
Helsinki 1976 
Hungarian National Report 
In Hungary, the cartographic employment of photogrammetry has been started 
after the First World War, to solve military cartographic problems, In the 
period following the Second World War, on the other hand, civil enterprises 
have also begun to use photogrammetrical technologies, mainly for plotting 
medium and large-scale maps, /In the following paragraphs the Hungarian 
application, facilities, and results of photogrammetry will be reported on in 
detail. 
1. Aerial photography 
For the photogrammetric tasks in Hungary, aerial photography is performed 
by using Wild RC-5, RC-8, and RC-10 cameras, The negatives are generally 
black-and white, with an Estar base dimensionally stable carrier, made by 
KODAK or ILFORD. The pictures are 23x23 cm, in format, made in 75 to 80 
per cent overlap with 152 mm, otherwise with 88 mm focal length camera cone. 
Occasionally the EKTACHOME color film of KODAK was used successfully, 
and developed in plate form. These color films were used mostly for aerial 
triangulation, and planimetry as well as relief plottings. 
Aerial photography is executed by aircrafts designed and maintained for this 
very purpose, In special cases aerial photography from helicopters was 
performed. Most of the aerial photography work is accomplished in March and 
April when foliage development and the existing agricultural crop vegetation do 
not interfere with relief plotting. Exposures are made at a height between 400 
and 4500 m. so their scale varies between 1:2500 and 1:30000. 
The majority of aerial photography for mapping and for settlements is areal in 
character, with only a smaller part performed for surveying linear establish - 
ments or for their planning and design. 
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