TAsıe 1 — Summary of some r.m.s. errors 
  
  
  
  
restitution instrument Analogue instruments Stereocomparators 
survey camera 1) 1 2 5 4 1—5 1 2 5 4 1—4 
N 12 7 13 9 32 4 4 4 6 18 
Dm 2.1 2.1 2,1 3,4 2.1 1,0 1,0 1,0 1,0 1,0 
Om 0,38 | 0,65 | 0,50 | 0,59 | 0,51 | 0,38 | 0.65 | 0,50 | 0,59 | 0,53 
mx in “u in the image“ 
1 measuring error 3,2 3,9 3,8 2,5 3,6 1,5 1,6 1,4 1,22) 1,5 
2,55) 
2 fitting error 14 12 15 9 14 10 9 11 6 9 
5 absolute error 11 15 15 8 15 7 10 9 6 8 
4 relative error 6 7 7 4 7 — — — 53) — 
4* relative error 8 9 11 6 9 — a -— a a 
5.1 7 8 8 5 7 4 6 6 4 5 
sa 10 12 11 8 11 6 8 7 6 7 
5.5; distance error 9 15 12 13 9 13 10 11 8 7 9 
5.4 12 10 14 7 12 7 7 9 5 7 
55 6 8 8 4 7 5 6 5 33 5 
8 systematic error 10 11 14 8 12 — o 53) — 
8* systematic error 7 9 10 5 9 — — — — — 
  
  
  
  
  
  
  
  
  
  
mz in “u in the image“ 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
1 measuring error 7 7 8 5 7 zz — — — zZ 
2 fitting error 22 30 26 11 26 24 32 26 8 23 
3 absolute error 26 31 25 15 7 22 29 19 15 20 
4 relative error 15 12 15 /4 14 — = — 65) — 
4* relative error 20 22 19 12 20 — — — — — 
8 systematic error 22 29 22 15 24 — — — 11» — 
8* systematic error 22 14 9 17 — — — — = 
Explanation: 
1) 1 = RMK 21/18, 2 = RMK 15/23, 3 = 2 X RMK 21/18, 4 = RC7a 10/14 
2) Precision-Stereocomparators 
3) Stereocomparators 1818 
) 
4) Converted into a co-ordinate error 
* After section 6 
— The errors of the short stretches, the end points of which are in different models (group 3) are 
somewhat larger than the errors of the large ones. After having been converted, they correspond 
roughly with the absolute errors. 
— The r.m.s. systematic error mg has been mentioned for the sake of completeness only, because 
the errors m4 and ms are lacking with comparator measurements. 
The influence of variables such as picture scale, camera, ete. were then computed, according to the 
remaining assignments of the test programme. For this purpose, not only the numerical values of the 
individual errors were determined but also the various ratios V between the r.m.s. errors (Table 2). 
In every case, one of these values was used as a unit. The solutions of the problems, as derived from 
the measurements, were as follows: 
— Problem 5 
The r.m.s. co-ordinate errors mz, in “microns in the image“, are practically of the same magnitude 
with both scales. The same applies to the r.m.s. height errors mz. 
— Problems 4a, 5, 6 and 7 
These problems were put together. Comparison of the results of the four cameras reveals that 
with the 2 X RMK 21/18 camera (convergent), the position errors and with the RMK 15/25, the 
height errors are a little larger than with the other film cameras. If the results of all three film 
18