Table 5. 
  
Unit — metre 
Flying altitude 600 metres (1:4 000) 450 metres (1: 3 000) 
Emulsion Panchromatic Colour Panchromatic Colour 
Test 1 2 3.1 3.2 4.1 4.2 
Given control points 
Operator’s residuals, rms ...... 0.087 0.108 0.057 0.039 0.029 0.068 
Adjusted residuals, so ........ 0.099 0.106 0.062 0.042 0.033 0.080 
Systematism J... U . 0.004 0.012 0.004 0.028 0.019 0.048 
F-test of the systematism ...... 0.175 1.17. 0.52 033: 035 0.37 
Significance ..............…. „ not not not not not not 
185 measured elevation points 
Discrepancies, rms .......... . 0.110 0.125. 0.103 0.105. 0.104 0.084 
Adjusted residuals, so ........ 0.103 0.103 0.093 0.097 0.105 0.031 
Systematis. ..« emiivs vike vinienr . 0.030 0.052 0.024 0.017 0.004 0.010 
F-test of the systematism ...... 821 25.7 6.21 3.02 0.18 1.58 
Significance |... A . highly highly highly almost not not 
Test Nos. 3 and 4 have been divided into 3.1 and 3.2 and 4.1 and 4.2 respecti- 
vely due to the fact that in each case there are two stereomodels. If n is the number 
of points, the following relation holds: 
n' (rms)? — (n — 3) : s? + 3 * (systematism)?. 
When n and systematism are small, so can be greater than rms. 
From the table it is evident that the systematism which appears does 
not depend only upon the absolute orientation but also on small errors in 
the control points. 
2. 'The accuracy of the contour lines has been analysed with the aid 
of the geodetic height determination. The result of the analysis is shown 
in Table 6. 
Table 6. 
Unit — metre 
Flying altitude 600 metres (1: 4 000) 450 metres (1: 3 000) 
Emulsion Panchromatic Colour Panchromatic Colour 
Test 1 2 3 4 
Root mean square .... 0.168 0.225 0.168 0.173 
After reduction to the 
AVERAGE ia ivan 0.166 0.186 0.163 0.172 
219