NORWAY 
13 
WIDEROE’S FLYVESELSKAP OG POLARFLY A/S 
(WIDER0E’S AVIATION AND POLAR FLIGHTS CO. LTD.) 
In 1935 Wider0e’s Flyveselskap og Polarfly A/S established a depart 
ment for photogrammetrical aerial survey, and specialized in photography 
for aerial survey and the construction of large and medium scale maps. Since 
then, the company has held a contract with the Norwegian Government, and 
has done all air photography for the official mapping of Norway. All air photo 
graphy for civilian air survey in Norway has also been carried out by this 
company. 
Equipment. 
The company possesses the following equipment for aerial survey: 
Aircraft: Two Airspeed Oxford. 
Cameras: Two Wild RC5, both with Aviogon and Aviotar lenses, focal length 
210 mm and 114,5 mm. 
Plotting instruments: 2 Wild A6, 1 Wild A8, 1 Wild A5 and 2 Wild A7. 
Near Fornebu Airfield at Oslo the company has constructed a building 
specialized for photogrammetrical laboratories with sections for plotting and 
drawing, mosaic-making, darkrooms and administration. The company’s film 
library now consists of 175.000 air photographs. 
Air photography has been carried out as follows: 
Scale 
Photographic Cover : 
Sq. miles 
Sq. km. 
Large scale 
277 
720 
Medium scale 
16.400 
42.515 
Small scale 
8 300 
21.685 
The company has accomplished accurate maps and photographic mo 
saics as follows: 
Accurate maps 
Photographic mosaics 
Scale 
Acres 
Scale 
Sq. miles 
Sq. km. 
1 
500 
1.650 
1 
1.000 
42.500 
Large 
770 
2.000 
1 
2.000 
3.900 
1 
4.000 
2.250 
Sq. miles: 
Medium 
5.000 
13.000 
1 
5.000 
635 
1 
7.000 
123 
Small 
7.300 
19.000 
1 
10.000 
560 
1 
25.000 
62