nM RUE 
ER ER SEE Ee 
  
  
  
  
  
  
      
  
  
  
10 
Table 1 
Mean values of the standard errors of strip coordinates after numerical correction 
and transformation. 
  
  
  
  
| BR | M, M, | M, 
| 10 | 7 4 | 10 | 
| (1.4) m (0.8)m | (2.0) m 
9| m 15 | xag 
| (60) se. | 68 
46 | 6 46 Be | 
| 84) os | M2 | 
60 | 120 82 158 | 
| (240) (16.4) (81.6) 
so | 190 118 | 240 
| (88.0) (93.6) | (48.0) 
ioo | 270 166 | 880 
(54.0) (83.2) (66.0) 
  
Case 3 
See fig. 3. 
This case proves to give approximately the same results as case 2 
under the conditions which are assumed here. The superfluous control 
points consequently mainly serve as checks against large errors in the 
control points. The curves of fig. 5—7 can be used as demonstration of 
the approximate error distribution. For a stricter treatment of the ad- 
justment problem of this case reference is made to [4], [5] and [6]. 
Summary 
Above the error distribution within aerial triangulation strips has 
been demonstrated for some cases which are of particular practical inte- 
rest. The prerequisites of the procedures have been clearly stated. It has 
to be emphazised that certain approximations have been introduced. 
Nevertheless the demonstrated results may give a rather good impres- 
sion of what can be expected from aerial triangulations under the assu- 
med conditions. 
The basic quantities for the determination of the accuracy are the 
standard errors of the y-parallax measurements. These quantities 
should always be determined in connection with aerial triangulation 
works as indicated in the references.