16 
3.11 Results of Partial Calibrations of Aerial 
Photographs 
The Oland test field has been photographed repeatedly 
with approximately vertical photographs from varying 
altitudes primarily by The Geographical Survey Office of 
Sweden. The photography has been ordered primarily by 
the Swedish National Road Board through Mr C. O. Tern- 
ryd. The flying altitude was usually 1200—1500 meters 
above the ground. The camera constant c = 153 mm. 
Mainly Wild cameras have been used, among those, the 
following: 
Ag 29, Ag 38, Ag 41, Ag 196, UAg 281, UAg 324, AgR 3 
In addition, the Danish organization Geodaetisk Instituí 
has photographed the test field with two Zeiss cameras 
RMK, Pleogon 2108 and 2118, and another Danish 
organization Landmaalernes Luftfotoopmaaling with two 
Wild cameras RC 8. 
The measurements of the photographs and the com 
putations were performed mainly by Mr A. Morón, MSE. 
The computations were made according to published 
principles, see the references, and using a program by A. 
Morón and Dr K Torlegárd. The theoretical and practical 
results of the work will be presented herein mainly as 
tables and diagrams, showing the most important syste 
matic errors and the basic standard errors of unit weight, 
indicating the limitations of the accuracy of the photo 
graphs (Table 3.11: 1 and Figs. 3.11: 1—15). 
Fig. 
conti 
base 
empii 
emuli 
Table 3.11:1. Summary of results of partial calibrations of aerial photographs 
Yearof 
Type of 
lens 
Number 
Polynomial 
Grid method 
photo 
graphy 
Test object 
Film 
Film base 
of cali- 
Computer 
S 0 ¡jun 
So p.m 
Remarks 
brations 
1 
3 
1 
2 
3 
1964 
Öland 
Aviogon 
A 
Acetate 
19 
Facit 
_ 
7.9 
_ 
1964 
” 
” 
” 
” 
5 
CD 3600 
— 
6.0 
21.4 
6.6 
5.7 
1965 
” 
В 
Polyester 
14 
Facit 
— 
— 
— 
5.5 
— 
1966 
” 
” 
” 
11 
CD 3600 
9.3 
4.0 
10.8 
5.2 
3.9 
1966 
11 
CD 3600 
4.9 
5.1 
4.3 
3.9 
After correction on 
4 fiducial marks, 
6 parameters used. 
1966 
11 
CD 3600 
4.7 
4.9 
4.2 
3.7 
After correction on 
4 fiducial marks, 
8 parameters used. 
1966 
Pleogon 
c 
” 
2 
CD 3600 
— 
4.6 
4.8 
4.4 
4.3 
1966 
Multicollimator 
Aviogon 
— 
Glass 
8 
CD 3600 
— 
2.1 
All tests on the same lens 
1966 
Pleogon 
— 
” 
1 
CD 3600 
— 
3.4 
1964 
Öland 
Aviogon 
D 
Acetate 
2 
Facit 
— 
— 
— 
10.0 
— 
Color film 
1967 
” 
E 
” 
1 
CD 3600 
— 
4.9 
20.1 
17.8 
4.7 
Spektrozonal film. 
Fig 
in 
poly 
poss 
tion 
of 
Film A Kodak Aerographic Super XX 
Film В Kodak Double X 
Film C Du Pont Cronar 
Film D Kodak Ektachrome 
Film E Kodak Ektachrome Infrared 
Type 1 only one scale factor used in the adjustment. 
Type 2 two scale factors 
Type 3 two scale factors and lack of orthogonality. 
Fii 
we 
im 
gn 
fly 
me 
reí