recherches vont des méthodes simplifiées de rédaction des cartes aux méthodes perfectionnées de restitution 
et d'analyse des données par ordinateur. Certaines de ces méthodes sont maintenant universellement 
appliquées. 
Il y a également au Canada un trés grand nombre d'entreprises de levés aériens qui offrent leurs services 
aux gouvernements provinciaux et municipaux ainsi qu'à l'industrie. 
Topographic mapping and airborne geophysical prospecting are still extremely important activities for 
Canada. The Surveys and Mapping Branch completed the mapping of Canada at a scale of 1:250,000 in 
1970. 
It has taken us only twenty (20) years to map this country at that scale and, considering the size of 
Canada, this is quite an achievement. I must say, however, that without the help of modern photogrammetry 
and new developments in cartography, it would have taken far longer to complete. The advances in these two 
sciences have revolutionized map making to the point that we can now produce better maps faster and more 
accurately than ever before. 
It is also because of the new developments in the fields of photogrammetry and cartography that I am 
able to announce today a new programme for the production of a National Atlas of Canada every ten 
years. 
We intend to produce a very comprehensive Atlas of Canada covering the topography and geology, as 
well as the human and economic geography of this country. Our purpose in doing so is to promote a deeper 
knowledge of Canada by all our people; to promote a sense of national unity and identity, and a clearer image 
of Canada abroad. 
Few of us realize the necessity of having such an atlas. Urban planners, resource managers, engineers, 
sociologists and scientists need to have access to up to date information in order to do their jobs. The Atlas will 
answer this need. School children and educators should also make good use of the Atlas because it will contain 
an extremely wide range of data on many aspects of Canadian life. Perhaps most importantly, an Atlas is an 
effective way of showing the complex relationships between such factors as geography, population density and 
growth, industrial growth, income and employment. 
We can all appreciate that the production of an atlas as comprehensive as this one is an immense task 
in itself. But itis made even more awesome when we consider that the data on human and economic geography 
is constantly changing. At the same time, the number of people and functions requiring current information 
is rapidly growing. For this reason, we have chosen a ten-year interval between editions of the Atlas so as to 
coincide with the decennial census of Canada. In addition, individual sheets will be published throughout the 
revision period to maintain the currency of rapidly changing data. 
Certains des outils les plus récemment développés dans le domaine de la photogrammétrie sont en 
montre ici au centre municipal. Le maire d'Ottawa, M. Pierre Benoit, présidera à l'ouverture de l'exposition 
demain. La variété des piéces exposées témoigne de l'envergure de la recherche photogrammétrique, tout en 
illustrant la nécessité d'établir la coopération entre gouvernements, industries et chercheurs individuels, car 
chaque secteur peut profiter des connaissances de l'autre. Cette coopération déjà a permis de grandes 
réalisations et j'espére qu'elle se poursuivra à l'avenir. 
Finally, I wish you all success in your discussions in Ottawa. For the next two weeks, your ideas will be 
studied and scrutinized; your many achievements will be judged and a part of your future will be plotted. I 
would like to remind you that your meetings here will have a bearing on the future development of Canada 
and many other nations. Above all, you as scientists and we as legislators must keep in mind that the future 
cannot be like the past. We must plan in such a way that our development is orderly and compatible with 
national goals and the interest of the people. This will require a more detailed knowledge than was necessary 
in previous years, and it is up to you as photogrammetrists and scientists to provide us with the tools and the 
information necessary to gain that knowledge. 
Again, I welcome you all to Canada and hope that your stay here will be valuable to you and the nations 
you represent. 
Thank you very much. 
Dr. Gamble: Unfortunately, the Honourable A.B.R. Lawrence, Minister of the Ontario Department of 
Resources Development is ill this morning and will not be present. However, it is a fortunate circumstance that 
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