The advantage of the process of digital photogrammetric 
restitution lies in the fact that a higher accuracy than 
in graphical plotting is achieved and that in the computer 
program, for example, the following requirements can be 
satisfied: 
- consideration of influences of the earth's curvature 
and refraction, 
= trangformation of data into the required map projection 
system, 
- introduction of subprograms for generalization to derive 
maps at different scales. 
The results are represented cartographically in the usual 
form in off-line operation on the DZT 90x120 Digital brewing 
able. 
Due to the high photographic quality achieved with the MKF-6 M 
on special Soviet Type 18 film, the photos have & ground 
resolution in channel 4 (640...680 nm) of about 10 m for 
linear features and about 15 m for isolated objects. The 
original negatives of channel 6 (790...890 nm) with the 
Soviet Type I840 infrared film have & photographic ground 
resolution of about 20 m for linegfestures and about 30 m 
for isolated objects. 
For measuring the complex system error in the digital photo- 
grammetric restitution of MKF-6 space photographs of Soyuz 22 
use was made of the STECOMETER C precision stereocomparator 
and the ASCORECORD 3 DP monocomparator of Jenoptik Jena and 
a computer program for analytical aerial triangulation. As 
control points and check points map contour points of street 
crossings were used and their coordinate values taken from 
a topographic map at the scale of 1:10 000. A single photo 
pair and an image series of 2 photo pairs were investigated. 
A comparison of the coordinates calculated by analytical 
aerial triangulation with those taken from the topographic 
map at the scale 1:10 O00 yielded for one photo pair a 
mean position error of +32.5 m (on ground) or +16 ‚um (in 
the photo plane) for the STECOMETER measurement and +17.5 m 
(on ground) or +9 jum (in the photo plane) for the ASCORECORD 
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