7.4 Further it would hardly be possible to determine with certainty any difference of accuracy between the 
strips I, II and HI, or between X and Y. The constant, systematic and random error parts of the total errors 
were of about the same size. These statements will refer to the measurement in the stereoautographs and 
in the stereocomparator. It would not be possible either to determine with certainty the differences of 
accuracy between measurements in the autographs or in the stereocomparator. The constant errors ho- 
wever (Compare table 7 of section 6.24) might be dependant of the model dimensions and of the rotary 
direction of the film. 
7.5 The photogrammetric accuracy at this experiment work might indeed be influenced only very little by 
different methods of relative and absolute orientation, by measurements with base-in or base-out. also by 
measurement with or without compensating devices for optical distortion. When comparing the accuracy 
results from the models A and B, it is further hardly possible to discern positive differences of accuracy 
dependant on the different individual autographs and operators. 
7.6 The transformation of machine-coordinates to the field system was performed separately for the 
coordinates in the plane and for the heights. It must however be indicated that errors of X and Y could 
possibly arise in such a case. Perhaps a coordinate transformation in space could give better results. 
7.7 The accuracy of large-scale photogrammetry is obviously in a very high degree dependant upon the iden- 
tifiability and edge sharpness of details in the photograph. These facts should be especially observed in 
further experimental researches. 
The experiment work Monti di Revóira 
Table 1:I. Survey of the errors for every model of strip L, vertical photography on plate. 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
i [AT The means M and standard deviations L | Helmert | | 
Parti- an $, and S, in millimeter A+B transform. Nob, | 
cıpa- o | ; LR ee | 
tor, | check- X Y Z error | cm pass- | 
model | points . TT) ; D ^ | | points | 
p M | S, | S: M |. S | S M | Sı | S; M | Si |Sq | Max. | 
| 
1A 1 75 79 4 | —55 84 51 | 32 | 122 | 78 36 | 100 | 14 | 32 | 9 
| B 54 3 84 56.1 —58 82 631— 79 | 143 | 112 6] 182 20] 351.7 
91A| 59|—29| 60 54 | + 8 57 55 |— 67 | 126 78 | +55 | 131 | Sj 1 | 9 
91 B 62 | +28 91 65 | +51 | 114 67 |—237 | 180 | 11 75 90] 9] 19] 7 
92 A 61 6 83 73 | 4-58 72 68 |—154 | 122 | 101 | +45 | 129] 6 | 12: 9 
92 B 61 | +16 | 107 66 | +66 | 100 58 |—262 | 149 | 111 78 | 105 9| 16] 7 | 
I0A| 6 |— 1| 93| 60|—81| 80| 58 4-98] 122. 105| —3 96 | - 11 |. 19 | 9 | 
10 B 65 14 76 57 78 79 55 |+ 16 | 121 97 | +59 | 101 6) Hl} | 
13 A 55 | +11 70 55 | -- 9| 170 57 |-- 98} 156 | 1832| 87] 170| 61 14} 9 
13 B 57] + 29 135 81 27 129 66 | 35 240 120 13 | 104 13 | 35 | 1 
| | | 
16 A 61| +3 72 70 7 99 65 | 2| 186 | 119 | +43 | 184 33| 657 9 | 
16 B 64 | +36 | 108 77 30 | 160 70 28 | 156 | 126 19 | 109 23 | 49 | 7 | 
22A| 57|+17| 86| 6|—7] 69] 61|+93| 186 | 166 | —37 | 101 9| 211.9 | 
22 B 63 1 69 60 - 3 77 69 | Ti 193 136 FAT | 105 7 | 17.1 0 | 
| | | | 
20A | 55 -- 8. 129| 385|—+63| 142 | 108 |—172 | 183 | 166 | +44 | 177 5| 28| 9 
20 B 58 $7 | 110 75 74 | 141 76 |— 20 | 170 |. 124 71 |. 148 13 20] 7 
A | 449 1 86 65 8 103 68 |— 35 1. 123 | +21 140 15 | 30] LA+B 
BI as4 | riz| 9| e| —20| 114| 66|— 92] 152] nel —20| 113]. 1| 20| Lan 
| JL 
A+B| 933 | + 5 93 67 14 | 102 | 67 60 153 | 120 127 14 30 |A N 
| | = 4 
| | | 
[.. | 
| | | | 
The weighted standard deviations of M. | | 
| à 
A 26 52 105 | 50 | | Last 
B 26 52 133 54 L4-—B 
= £o ] f FI 
A+B 26 52 | 120 | 52 | In 
  
  
  
  
  
  
  
  
  
  
Parti 
cipa- 
tor, 
mode 
N N 
yy EE Dmm 
r2 N 
— 
LA 
N N 
N N 
MS