237 
4. CARTOGRAPHIC POTENTIAL OF SPACE PHOTOGRAPHS 
An usual and generally accepted criterion for the qua 
lity of remote sensing data is their potential for map 
ping. The assessment of the generation of topographic line 
maps and image maps from space photographs takes place 
accordingly the geometric resolution, the position and 
height accuracy and the completeness of the identifica 
tion of topographic objects. 
In case of geometric assessment we proceed in general 
from the demands 
- by line maps (LM): for the position accuracy of topogra 
phic objects from 0,1 ... 0,2 mm in the mapping scale 
and for their detectability depending on the scale 
- by image maps (IM):for the resolution by 0,3 pixels/mm. 
That means that from the geometric point of view the 
acceptable scales 
for mapping are 
0,2. 
ii 
f-0 
i 
7 • 5000 
Q 
(l) 
R 
'N 
0,3-Z 
R 
10 " 3 
7 : 200 0 
R 
(2) 
□n the other hand for the considering cameras exists an 
empirical relation between the orginal scale mo and the 
resolution R 
R 
vrj 
o 
K 
With the values in table 1 we found 7.5 < K < 35 and 
therefore the equation (1) is 
m 
LM 
& 0.OÏ... 0, 18 m 0 
(3) 
The relations (2) and (3) give a rough orientation for 
the possibility of map generation from space photographs. 
These relations are in a good agreement with a lot of 
practical experiences and provided investigations in the 
last years. A generalization of this assessment for gene 
ration of maps is given in table 4.