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National Reports 
Technical Report from Norway 
by Arne Haider 
Equipment: 
1) Bjornerud and Arnestad photoboard, used in stereoscope studies of 
photos of a size up to 23 x 23 cm, has been designed for field reconnaissance. 
General descriptions--The equipment is constructed of two square "boards" of 
stainless steel that can be folded and placed in a "field bag". The photo- 
board is grooved along the edge on the upper side. This groove serves as a 
sliding path for a rim of 2 mm steel wire. This rim holds the stereoscope 
onto the plate when the footing of the stereoscope is slipped under the wire. 
The photos are attached with tape or magnets. 
Technique: 
1) Reproduction by microfilm 
In order to supply the district personnel of the Crown Forest Administration 
with standard map materiel for management and planning tasks, photo enlarge- 
ments with a scale of 1:12,000 (from 1:50,000 photography scale) are used. 
Out of each enlargement a center area of about 60 x 80 cm is cut into 4 - 
30 x 40 cm pieces. 
On these enlargements ( original copy) border lines, forest data--stand 
and site index--and legends are printed. 
Several copies of these enlargements, however, are needed by the 
district personnel. The reproduction is done by use of Microfilm and AGP 
Halbtohn photo-paper. The copies are in the same scale 1:12,000. 
By this method the expenses of the duplication are kept at a reasonable 
rate. The quality of the photo copies is satisfactory. In addition, the 
index system work is greatly simplified. (See enclosed chapter of the 
National Report from Norway--regarding the Crown Forest Administration.) 
Technical Report from Sweden 
by 
Sven G. Moller, Hans Axelsson, and M. Jensen 
Usual equipment such as pocket and mirror stereoscopes , Zeiss Stereopret, 
Stereotop, and sketchmasters were used for ordinary PI, Some interpretation 
for road planning was made by using Balplex plotters. Interpretation for 
reallotment of forests was performed at the land Survey by using the Wild AB 
plotter. The following minor equipment was used for PI: special glass plates 
for a Stereometer, the plates have a series of different small points and 
circles with exactly known dimensions; interpretation-scales, engraved on 
plastic sheets, consisting of mm-scales in right angles, parallax wedge, 
micrometer wedge and a series of small circles with different but known 
dimensions: measuring microscope with two parallel precision-scales, the one 
for summing up the crown-diameters of trees and the other for summing up the 
interspaces between the crowns.