PREFACE 
Several official committee reports and board pro- 
nouncements during the 1950s and earlier have stated 
the lack of a large scale map system in Norway, as 
well as the need for a more informative survey of 
areas basic to plant production and their distribution 
on the individual farm units. Extended experiments 
to meet these requests were started by the Department 
for Agricultural Development in 1960. 
Signalizing property boundary points for photo- 
grammetric mapping had previously given unsatis- 
factory results, among other reasons because land 
owners failed to support the project. One main task 
therefore was to find out with which accuracy points 
not directly visible in the photographs could be map- 
ped under various conditions, and the most suitable 
method for this mapping procedure. 
The experiments in mapping property boundary 
lines have been performed in cooperation with the 
Institute for Geodesy and Photogrammetry, The 
Technical University of Norway, Trondheim, under 
the supervision of Professor J. Holsen, who is also 
responsible for the experiment report. 
A brief preliminary report was drafted for the Tenth 
International Congress of Photogrammety 1964. Civil 
Engineer O. Qfsti, who has carried out the major 
part of the research program, here presents a more 
extensive excerpt from the experiment report. 
O. Einevoll 
Department for Agricultural Development, As, Norway.