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25 
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15. österreichische Gesellschaft für Photo 
grammetrie. 
Friedrich Schmidt Platz 3, Wien III, Austria 
16. Survey of Pakistan. 
Post Box 3906, Karachi, Pakistan 
17. Suomen Fotogrammetrinen Seura. 
(The Finnish Society for Photogrammetry) 
Linnankuja 17, Helsingfors, Finland 
18. Deutsche Gesellschaft für Photogram 
metrie E. V. 
Institut für Photogrammetrie, Techn. Hochschule, 
München 2, Germany 
19. Société Suisse de Photogrammétrie. 
c/o E. Huber 
Service Topographique Fédéral 
Wabern/Bern, Switzerland 
20. Société Belge de Photogrammétrie. 
c/o E. Daubresse 
28 Square de Meeus, Bruxelles, Belgium 
triangulation. This technique involves the use of 
stereocomparator measures of photography taken with 
a focal-plane reseau. The rigorous computations are 
performed with electronic equipment and follow closely 
the stereo-plotter technique of extension. Both relative 
and absolute orientations are specified by orthogonal 
matrices. The adjustments are nonrigorous and are of 
a semi-graphic nature. Each phase of the technique 
is illustrated with diagrams, photographs or maps. A 
subsidiary display illustrates a method of air survey 
of tidelines using infra-red air photography. 
Activities and Products 
In Great Britain there are a number of government 
and privately owned organizations engaged in aerial 
surveys. Their activities extend world-wide and cover 
topographical, geological, and other types of surveys. 
The titles of some of these organizations are displayed 
on the national exhibit and some of them have their 
own exhibits in the Exhibition. 
21. Nederlandse Vereniging voor Foto- 
grammetrie. 
c/o J. Visser 
I. T.C. 
Ivanaalweg 4, Delft, Holland 
22. Norsk Fotogrammetrisk Selskap. 
(The Norwegian Society for Photogrammetry) 
c/o Topograf P. Void 
St. Olavsgt. 32, Oslo, Norway 
23. Sociedad Fotogrametrica de Chile. 
Dept. Topografico del Institute Geografico Militar, 
Castro 354, Santiago, Chile 
24. Photogrammetric Society of Israel. 
P. O. B. 2730, Tel Aviv, Israel 
25. National Committee for Photogram 
metry — Great Britain 
c/o Ordnance Survey Office 
Leatherhead Road, Chessington, Surrey, England 
Exhibit 
The national exhibit from Great Britain displays, 
principally, the Ordnance Survey technique of aerial 
27 
Representative 
J. von Platen 
Exhibit 
The calculating machine BRUNSVIGA 183 with three 
setting registers, two product registers, and two mul 
tiplier registers. This triplet is specially suitable for 
the transformation of co-ordinates using four trans 
formation constants. 
The electric calculator BRUNSVIGA 11 E. This small 
calculating machine is specially adapted for use in 
immediate connection with a stereoplanigrame or 
other outfit. 
Activities and Products 
Calculating and adding machines. 
Swedish Representative 
Oscar Sundin, Fredsgatan 6, Stockholm C. 
per- 
for 
nsti- 
aphy 
*rad- 
tions 
ibus, 
26. Svenska Sallskapet for Fotogrammetrl. 
(The Swedish Society for Photogrammetry) 
Forsvarsstaben, Stockholm 90, Sweden 
28. Brunsviga Maschinenwerke AG. 
Braunschweig, Germany 
28 
29. Eastman Kodak Company. 
343 State Street, Rochester 4 
N.Y., USA 
Exhibit 
The exhibit will consist of a display of colour trans 
parencies and photographs depicting the use of photo 
graphy in map making. 
369