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Transactions of the Symposium on Photo Interpretation

At the formal opening ceremony on 30th August,
a word of welcome was given by Ir. L. van Zuylen,
in his capacity as representative of the Netherlands
Society for Photogrammetry. Thereafter the Sym
posium was declared open by Professor Dr. W.
Schermerhorn, Dean of the International Train
ing Centre for Aerial Survey, Delft. After addresses
by Major-General R. Ll. Brown, Vice-President
of the International Society for Photogrammetry
and by Mr. E. Walter of UNESCO, the following
Presidential Address was delivered by Professor Dr.
E. U. de Sitter, Vice-President of Commission
VII, I.S.P., in the absence of the President,
Professor Dr. C. H. Edelman.