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ing, it is possible, for example, to obtain infor- 
mation necessary for solving problems concern- 
ing the inventory and exploitation of natural re- 
sources, which are of vital importance for the 
whole of mankind. An unprecentedly close col- 
laboration between specialists in the fields of 
electronics, physics, etc., will certainly produce 
results which we are unable to foresee. 
For the elucidation of all of us, both specialists 
and laymen, | would finally wish to present the 
basic idea of stereophotogrammetry in a slightly 
modified form. A picture of our world projected 
to only one point is flat. But if we look at our 
world from two differing angles with equal inten- 
sity, without prejudice, this picture is given a 
new dimension, that of depth, and is roused to a 
life far more realistic than before. In other words, 
| hope that this Congress, in bringing together 
participants from some 60 countries, representing 
varying living conditions and ways of thought, 
will prove fruitful not only professionally, but 
also on a purely human level by giving us a less 
biased picture of the world and by promoting 
mutual understanding based on the realities of 
life. 
The Congress Director called upon Mr. Seppo 
Hármálá, President of the host society, the 
Finnish Society of Photogrammetry. 
Mr. Seppo Härmälä: 
Distinguished Delegates, Ladies and Gentlemen, 
Mesdames et Messieurs, Meine Damen und Her- 
ren. 
On behalf of the Finnish Society of Photogram- 
metry | have the honour to welcome you to the 
XIIIth International Congress for Photogram- 
metry. 
We welcome you here as our friends, and our 
friendship has already lasted a long time. It was 
fifty years ago that our countrymen attended 
for the first time a photogrammetric congress, 
the lind International Congress in Berlin. 
Participation in the congress was an indication 
of the keen interest in photogrammetry felt al- 
ready at that time. The first modest attempts 
were made in the field of terrestrial photogram- 
metry. However, it is only in connection with the 
aerial photographs that the actual investigations 
for the development of the field were started. 
The first controlled mosaics were completed in 
the year 1927. The persistant efforts by General 
Nenonen and Dr. Lófstróm resulted in the method 
of horizon measurements which proved to be 
extremely successful in the mapping of Finland. 
The method was ready for presentation in the 
year 1934 at the IVth International Congress in 
Paris. There it was presented by Dr. Lófstróm, 
the present Congress Director. 
The great expectations cherished about photo- 
grammetry have not been in vain. Last year the 
base map of Finland was finished and all our 
337000 square kilometres were mapped at least 
at 1:20000. For a population of 4700000 it has 
been a great achievement. Without photogram- 
metry it would not have been possible. 
In international collaboration Finland has played 
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an active role as both a receiver and a contribu- 
tor. Aside from matters of professional and scien- 
tific value, we have gained good friends in dif- 
ferent parts of the world. At the same time we 
have had opportunities to visit many interesting 
and beautiful countries. One drawback they seem 
to have, in general, they are usually remotely 
located. 
It might appear easier to take part in a congress 
held in one's own country than abroad. | can 
assure you, however, that in fact it is quite the 
contrary. The preparations for a congress are 
laborious and the result is not economically pro- 
fitable. The setting is the same as when preparing 
for a great family celebration: much work and no 
gain. Nevertheless, in both cases the arrange- 
ments are made in an atmosphere of cheerful 
excitement and expectation. 
Now the preparations have been made and the 
guests have arrived. The celebration may begin. 
Welcome, Bienvenu, Willkommen, Benvenuto, 
Dabró paZálovat, Bienvenido, Changei Simásu, 
Karibu, Välkommen, Tervetuloa. 
On behalf of the International Society of Photo- 
grammetry, the Congress Director called upon 
the President, Dr. S. G. Gamble, to reply to the 
welcoming addresses. 
Dr. S. G. Gamble: 
Hyvät Naiset ja Herrat, Mesdames, Mesdemoi- 
selles, Messieurs, Meine Damen, Meine Herren, 
Ladies and Gentlemen. 
On behalf of the International Society for Photo- 
grammetry, its officers, Member Bodies and all 
participants at this XIIIth International Congress 
for Photogrammetry, | thank your Excellency 
Minister of Defence, Mr. I. S. Melin, Deputy Mayor 
of Helsinki, Mr. A. K. Loimaranta, and the Rector 
of the Helsinki University of Technology, Dr. P. 
Laasonen, for your gracious welcomes to your 
beautiful country and this famous city and the 
renowned Technical University of Helsinki. | thank 
Mr. Härmälä, President of the Finnish Society of 
Photogrammetry, for the tremendous work your 
Society has undertaken in assuming the responsi- 
bility for this important gathering of photogram- 
metrists from the four corners of the world. We 
are indeed most honoured by having you partici- 
pate in our Opening Ceremony. 
Many of us have looked forward for a number of 
years to spending a few weeks here at the Con- 
gress in the company of our Finnish hosts. For 
most of us Helsinki is a long way from home 
and yet Finland occupies a prominent place in 
the minds of many of us because of the contri- 
bution of its people to the arts, sciences and, 
since this is the year of the Olympics, | hasten 
to add, athletic accomplishments. When | was 
somewhat younger, the most prominent name in 
athletics and that name became identified with 
the Olympics, was that of Paavo Nurmi. | doubt 
if there is any single person who has achieved 
the world wide acclaim that he achieved through 
excellence in athletic performance. 
In the world of arts the name of Jean Sibelius 
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