General Features 
a. Introduction. 
Photogrammetry is the only surveying method in todays official map making 
in Norway. Also the bulk of large scale maps (1/1 000—1/10 000) established for 
town planning, engineering, planning, real estate developments, forestry etc. 
are produced by photogrammetric methods. 
b. Photography. 
In Arctic and Antarctic regions, oblique photograms have mostly been app- 
lied for the small scale mapping, the camera beeing a Zeiss f=21 cm dipped 20° 
from the horizon. In Norway however, photogrammetric mapping is based 
exclusively on vertical photography and the cameras used are Wild RC 5 and 
RC 8 with the following lenses: Aviotar 21 cm, Aviogon 11,5 cm and 15,5 cm. 
Only a few days of good photographic weather occur each year, and therefor a 
very careful organization is needed to exploit fully those days with good weather 
condition. 
Aaerial photography is provided by private companies: 
1. Widerges Flyveselskap A/S and 
2. Nor Flyselskap A/S, 
under license from the Ministry of Defence. 
c. Mapping institution. 
At present, photogrammetry is used by the following governmental insti- 
tutions: 
The Geographical Survey of Norway, 
The Norwegian Polar Institute, 
The Ministry of Agriculture, and 
by the private companies: 
Widerges Flyveselskap A/S, 
Fjellangers Oppmáling og Luftkartlegging, 
Dahl Oppmaling, 
Norsk Oppmiling og Planlegging. 
d. Equipment and Methods. 
Institutions in Norway working with photogrammetry, have the following 
equipment at their disposal: 
4 Wild A7 
| Zeiss Stereoplanigraph C4 
2 Wild A5 
9 Wild A8