NORWAY 
5 
The following table gives a summary of the working procedure and the 
accuracy requirements of the Geographical Survey of Norway. 
Map scale 
1 : 50 000 
1 : 25 000 
1 : 10 000 
Photo scale 
l : 35 000 
1 : 40 000 
1 : 20 000 
1 : 30 000 
1 : 18 000 
1 : 25 000 
Compilation scale 
1 : 50 000 
1 : 40 000 
1 : 20 000 
1 : 10 000 
Type of camera used 
Wild RC 5 
f 11,5, 18 X 
Aviogon 
18 cm. 
Wild Aviogon fll.5 
or Aviotar f 21 
Ground control require 
ments for aerial trian 
gulation 
4 — 5 points in first model. 
Further 2 points for every 
5th model 
Accuracy requirements of 
the ground control points 
Vertical tolerance 
Horizontal tolerance 
1.5 m 
2.5 m 
1 m 
1,5 m 
0,5 m 
0,5—0,8 m 
Accuracy requirements of 
control points determined 
by aerial triangulation 
Vertical tolerance 
Mean error 
¿3m 
Mean error 
t 2 m 
Horizontal tolerance 
Mean error 
T 3,5 m 
Mean error 
î U m 
Area compiled in km 2 . 
Year 
1 : 50 000 
1 : 25 000 
1 : 10 000 
Total 
1952 
3620 
60 
3680 
1953 
2970 
2970 
2810 1 ) 
2810 
1954 
2020 
100 
2120 
1955 
3890 
60 
3950 
4100 1 ) 
4100 
Total 
19410 
60 
160 
19630 
*) Compiled by Army Map Service, U.S.A. 
(Ground control and field checking by Geographical Survey of Norway.)