93 
Le centers in 
calculations, 
oints for the 
t-mentioned 
. The coor- 
coordinates. 
rk: 
in the dia- 
to be taken 
»ositives. 
the optimal 
lower strip 
ral strips in 
the lateral 
ier sections 
diapositives 
numbering, 
in sections 
ntrol points 
î aeroplane. 
igraph with 
ht-measure- 
ieformation 
vith respect 
r the earth 
's plane had 
oplanigraph 
o guarantee 
Ausführung 
otriangulat- 
sitives. We 
er: 
e numerical 
1 scale), 
äans of the 
2.2.3. The conjunction from model to model is done via the heights of 
the nadir points. 
2.2.4. All points are measured in two settings whereby the coordinate 
values are printed. 
From the differences of the double measurements of 1460 points the setting accu 
racy of an individual point ( Az \/-) as well as the mean error of the mean 
lYrfrFw ' v 2 n J 
value J Az l A y j used for further work was as follows: 
TABLE I - 
- SETTING ACCURACY 
V 
lean 
square error 
one setting 
of the mean value 
Z 
0.034 mm 
( = 0.85 m = 0.1 % 0 
h) 
0.024 mm 
(=0.60 m = 0.07 %„ h) 
X 
0.017 mm 
(=0.42 m) 
0.012 mm 
(= 0,30 m) 
y 
0.020 mm 
( = 0 50 m) 
0 014 mm 
(= 0.35 m) 
3 — STRIP ADJUSTMENT 
3.1. Revision of the mechanical coordinates. 
The numerical data obtained by mechanical aerotriangulation have been revised 
by strips so that one set of coordinate values x, y, z for each measured point were 
available for adjustment: 
for x, y and 2: averaging of the coordinates by means of the two measurements 
per model 
for 2: correction of the curvature of the earth [1] 
for 2: tilting of the model by means of the tie points at the upper and 
lower strip edge and in the nadir point 
for x and y: parallel shifting from model to model according to the locking 
differences of the counters at the tie points 
for x, y and 2: ascertaining the mean values for those points which are the same 
in two consecutive models. 
Drafting the lists for the final machine coordinates. 
3.2. Adjustment. 
We listed the corresponding data on special blanks, i. e. « Zusammenstellung 
fur die Ausgleichung des Streifens No. ...» (Values for adjustment of strip No. . . ., 
machine and geodetic coordinates of controll points). 
The strip adjustment was carried out for all the 3 coordinates jointly according 
to formulae of the 2nd degree which are valid not only for the strip-axis but for the 
whole width of the strip. The formulae for x, y and 2 have a correlation with respect 
to the scale factor and take in consideration the «topographical » correction for points 
[1] W. Brucklacher, Zur Korrektur des Einflusses der Erdkrümmung bei der Bestimmung von Punkthöhen 
mittels Aerotriangulation, Bildmessung und Luftbildwesen, 1962/4.