1.2. In the current period Commission III has had only one 
working group, with the task of studying the geometrical 
aspects of remote sensing. In 1974 the Commission held an in- 
ternational symposium at Stuttgart.l) It was dedicated to 
Professor Willem Schermerhorn, at the occasion of his 80th 
birthday, in appreciation of his contributions to the deve- 
lopment of aerial triangulation. About 120 participants atten- 
ded the symposium which was highly successful owing to out- 
standing contributions and engaged discussions amongst the 
experts. Of 55 submitted papers 35 have been selected for 
presentation. The majority of the papers still dealt with 
aerial triangulation. Also the new topics digital terrain 
models and remote sensing were well covered by 15 papers. 
The following review refers essentially to the results of the 
symposium and to its state of information. 
> 
2. Photogrammetric point determination, aerial triangulation 
Practical application of aerial triangulation dates back more 
than 45 years. During the past 2 decades a ue development of 
cameras, of measuring equipment, and of electronic computation 
has reached a new level of performance and of technology. It 
seemed that aerial triangulation has reached its final stage 
of development, when assessed with regard to its conventio- 
nal aims. Nevertheless it continues to be a topic of general 
interest. On the one hand practical application is expanding 
considerably. On the other hand the possibilities for still 
increasing the accuracy performance by refined mathematical 
approach attract theoretical interest and highly stimulate 
new progress beyond the classical scope of aerial triangula- 
tion. 
Two of the three resolutions of the Ottawa Congress in 1972 
which concern Commission III have recommended thorough studies 
of the error problems of aerial triangulation and the use of 
auxiliary data for camera orientation parameters. In both 
areas intensive and successful developments have taken place. 
it. AS only the field of the third resolution (joint-adjust- 
ment of terrestrical and photogrammetric data) in which pro- 
gress has been slower by comparison 
te of practical application 
ic publications can give only a biased view on the 
practical application within a technical field. There- 
fore, it is pointed out explicitly that aerial triangulation 
has recently expanded its application very much, owing to the 
availability and the high accuracy and economy performance of 
computational blocktriangulation. 
feed 
) The proceedings of the symposium are published in 
Deutsche Geodatische Kommission, Reihe B, Heft 214, Munich 1975, 
364 pages