a) AB Geocode, program Fo4. The program transforms all ste 
reomodels to one system and this in turn is transformed to 
the ground system (Helmert transformation). Capacity: 127 
stereomodels, 1100 points. 
b) National Land Survey Board, Program M 11. The adjust 
ment takes place in three steps. In the first step, an approxi 
mative two-dimensionell fitting of the different coordinate 
systems into the given system is performed, by which the 
approximative x ,and y coordinates and scale-factors are 
obtained. 
In the second step, the coordinate system is levelled with 
the help of the given z-values. 
In the last and final adjustment, the plane coordinates are 
determined with the help of the approximate values obtained 
earlier. 
The adjustment operation between the models and the trans 
formation to the ground system is thus performed simultan 
eously. Capacity: 15 stereo-models, 1000 points. 
c) Photogrammetric Division, Royal Institute of Technology, 
Stockholm. 
Intended for separate models, according to Helmert or affine. 
No limit to the number of points. 
d) The Swedish National Road Board and Nordisk ADB AB. 
Three-dimensionell transformation, by which the result is 
shown in cross-sections for design of roads. 
2. Analytical Photogrammetry. 
A program has been developed by the Photogrammetric Division 
of the Royal Institute of Technology in Stockholm. First the 
picture coordinates are corrected for the principal point errors, 
distortion, refraction and curvature of the earth. After this, the 
relative orientation is determined with the help of a maximum of 
25 points in arbitary positions. In the last step, a three-dimensio 
nell coordinate transformation is carried out. 
3. Checking of Cameras and Instruments. 
a) Distortion measurements by the grid method. The Photogram 
metric Division of the Royal Institute of Technology, Stock 
holm. 
b) The same as above. Swedish National Road Board. 
4. Miscellaneous programs. 
a) Projective relations between two planes. The Photogrammetric 
Division of the Royal Institute of Technology, Stockholm. 
b) Terrestrial stereo-photogrammetry. The Photogrammetric 
Division of the Royal Institute of Technology, Stockholm. 
c) Displaced coordinates. The program is used for rectification. 
The Geographical Survey Office. 
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