Full text: Commissions III (Part 5)

to be 2. c 05. The differences between the A8-values and the horizon 
camera values were according to the chi 2 -test normally distributed on 
the 5 % level. 
The result proves that the horizon camera is very useful especially 
for aerial strip triangulation and for rectification. Further practical 
tests of this kind are, however, desirable. They ought to be realized 
under different topographical conditions and with infrafilm material 
in the horizon camera in order to determine the influence of different 
factors upon the accuracy more correctly. The possibility to use the 
horizon camera as auxiliary mean in aerial triangulation ought to be 
tested more detailed in practice. 
Acknowledgements. 
In the investigations the following persons have taken part: 
Civileng. L. Carlstedt 
„ Â. Jonsson 
„ P. Kaasila 
Eng. K. Dahl 
The investigation has been made under the direction of professor 
B. Hallert and head of the department C. O. Ternryd. 
References. 
[1] Löf ström, K.: Entzerrung von Luftbildern durch Horizontbildvermessung 
und Verfahren zur Herstellung von Luftbildplänen. — Bildmessung 
und Luftbildwesen, 3, 1932. 
[2] v. Gruber, O.: Beitrag zur Theorie und Praxis von Aeropolygonierung 
Aeronivellement. — Bildmessung und Luftbildwesen, 3—4, 1935. 
[3] Löf ström, K.: Das finnische Verfahren zur direkten Bestimmung der äusse 
ren Orientierung der Luftbildkammer. — Int. Archiv für Photo- 
grammetrie VIII, 2, s. 220, 1937. 
[4] v. Gruber, 10.: Horizontbilder und ihre Verwendung. — Photogrammetria 
III, 2, 1940. 
[5] Brucklacher, IV.: Horizontbilder und ihre Verwendung. — Bildmessung und 
Luftbildwesen, XV, 2, 1940. 
[6] Löf ström, K.: Die letzten Fortschritte in der Horizont- und Statoskopver- 
messung. — Sshw. Zeitschrift für Vermessung, Kulturtechnik und 
Photogrammetrie, 7, 1946. 
[7] Löf ström, K.: Latest Developments in the Direct Determination of the 
Outer Orientation in Finland. — Int. Archives of Phtogrammetry, 
Volym X, Second Part, p. 246, 1948. 
[8] Halonen, R. S.: Über die Genauigkeit der Methoden zur Bestimmung der 
äusseren Orientierungsgrössen der Luftkammer, Dissertat, T. H. 
Helsinki, 1951.
	        
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