33 
o orthoprojectors (example): 
aerial photographs at about 1:10,000 scale taken of non 
flat terrain can be differentially rectified with a posi 
tional accuracy on the orthophoto of m„ = 0,1 mm ... 0,3 mm 
■ s 
o stereoplotters/orthoprojectors (example): 
by means of photogrammetric line or profile measurement, 
contour representations ~ 1:5,000 can be produced with 
mean altitude errors for interpolated points (in low moun 
tain range) [5] of 
1 : mb 
line measurement 
profile measurement 
1: 8,000 
Ì m H 
. = 0, it m 
0,5 m 
1:12,000 
0,8 
0,9 
1:20,000 
1,0 
1,2 
by means 
of image 
correlators, the 
full-automatic scanning 
of a stereomodel in profile lines is possible with storage 
of the coordinates x, y, z (according to time or path in 
terval) 
o stereoplotting systems with an interactive mode of opera 
tion are more and more introduced into practice 
o digital image processing systems (also with an interactive 
mode of operation) gain increasing significance with re 
spect to automatic character recognition (pattern recog 
nition) . 
As pointed out before, the aforementioned photogrammetric in 
strument technique serves the gaining, processing, and evaluat 
ing of image recordings, the representation of the evaluation 
results being possible in graphical and/or numerical form. With 
cartographic tasks, photogrammetry furnishes, as a rule, a map 
design in graphical and/or numerical form. But in the prepara 
tion of a numerical map design (as mentioned already) some