PHOTOGRAMMETRY IN NORWAY 
1938—1955 
Introduction. 
This report is a continuation of the National Report of 1938 (Photogram- 
metrie in Norwegen 1934—1937). Therefore it also includes a review of the 
photogrammetric activity for the periods 1938—1947 and 1948—1951. 
At present, photogrammetry is used by the following governmental in 
stitutions: 
The Geographical Survey of Norway (Norges geografiske oppmâling). 
The Norwegian Polar Institute (Norsk Polarinstitutt). 
The Ministry of Agriculture, 
and by the 3 following companies: 
Wideroes Flyveselskap og Polarfly a/s, Oslo. 
Dahl Oppmâling, Oslo. 
Norsk Luftkartlegging, Trondheim (established 1955). 
The aerial photography is mainly done by the private company Wideroes 
Flyveselskap og Polarfly a/s, under license from the Ministry of Defence. 
The Geographical Survey of Norway and the Norwegian Polar Institute 
perform systematical topographic mapping of Norway proper and the Nor 
wegian Arctic Territories respectively. The Norwegian Polar Institute also 
treats the photogrammetric material obtained in the Antarctic. 
The Ministry of Agriculture is tentatively applying photogrammetry for 
re-allotments and forest surveys. 
The three private companies mentioned above produce maps photogram- 
metrically on the scales 1 : 10 000 to 1 : 500 for various purposes. 
An organized governmental cadastral survey does not exist in our country. 
However, the demand for maps on the scales 1 : 10 000, 1 : 5 000 and 1 : 1000 
is steadily increasing, and so is the interest and application of the photogram 
metric method. 
The weather conditions in Norway are not very favourable for aerial 
photography. 
During the summer-months June, July and August the average number 
of days suited for aerial photography is only 8. In the mountain regions