in the application of the knowledge we contribute. We need to look beyond the immediate application and 
judge the second- and third- order consequences for individual human beings and the implications for society 
as a whole. Advance assessment of projects, by showing the trade-offs between beneficial and harmful effects 
can have preventive significance. The role of advisor and policy maker is one which we should not just accept 
but actively seek out. As President Kennedy told the National Academy of Sciences in 1961: “One of the 
problems of a free society is that all of the questions we must decide are extremely sophisticated questions. 
Those of us who are not expert must turn, in the last resort, to objective, disinterested scientists who bring a 
strong sense of public responsibility and public obligation”. 
At the same time we must be careful to differentiate between advising within the scope of our expertise, 
and expressing personal views on issues of public policy to which we are entitled no more and no less than our 
fellow citizens. In this regard it is helpful to remember that if an issue can be decided by vote, it is not a 
scientific issue, for nature is the final arbiter of science. 
Nevertheless, policy making eventually involves a matter of choice, and choice means a rejection of some 
things and acceptance of others. It does not mean that because something can be done, it ought to be done. We 
must contribute to a better system for making choices than response to - or reaction to - protests. In the end, 
of course, choice means morality: defining a set of values and acting on them. 
We are agreed that morality includes making the benefits of civilization available to all men. We are 
agreed that it includes preservation of the world for the benefit of future generations. We, as a profession, have 
a major contribution to make to the attainment of those goals. Once we accept that responsibility there is no 
turning back, except for those who value surface over depth and impact over implication. 
Conclusion 
There is an old Arab proverb: “Four things never return - the spent arrow, the lost youth, the spoken 
word, and the missed opportunity’. Well, the spent arrow is probably stuck in the polluted air; our lost youth 
has slipped from our chests to our waists; the spoken word is often best forgotten. All that remains is the 
opportunity. As we go through our deliberations in the next two weeks, let us keep in mind both the 
opportunity and the challenge which we face. And in the words of Ecclesiastes, ** Whatsoever thy hand findeth 
to do, do it with thy might". 
Dr. Gamble: And now our immediate Past President, Dr. Hans Härry to thank Mr. Doyle. 
Dr. Härry: Mr. Chairman, Ladies and Gentlemen. Mr. Doyle, you have given us a very interesting address. We 
heard new ideas from the new world and we got a view into the future of our fine techniques. Many of us will 
give verbal thoughts to the successes we have. We are much obliged to you Mr. Doyle and it is a great pleasure 
for me to express the thanks of your colleagues. 
Nous, auditeurs, sommes trés impressionnés par les idées, suggestions et projets que M. Doyle nous a 
développés. Au nom de vous tous, j'ai le devoir agréable d'exprimer au conférencier les sentiments de notre 
profonde gratitude. Le vieux photogrammétre qui a commencé, il y a cinquante ou soixante ans, à étudier et 
à pratiquer la photogrammétrie, est enthousiasmé des moyens techniques dons nous disposons aujourd "hui et 
que M. Doyle nous a montrés. Dans le temps, l'enthousiasme était plus grand que les moyens techniques. 
Unserer Kollege Fred Doyle hat für uns anregende und zukunftweisende Ideen entwickelt. Die 
Ausführungen verden den einen und anderen von uns noch einige Zeit bescháftigen. Der alte Photogrammeter 
der vor fünfzig oder sechzig Jahren Bekanntschaft mit der Theorie und der Praxis der Photogrammetrie 
machte, ist begeistert von den wissenschaftlichen und technischen Mitteln, die uns Fred Doyle gezeigt hat. 
Früher hatten wir nur die Begeisterung und wenig technische Mittel, aber es ist Kollegen weiterleben wird. Wir 
danken Fred Doyle für seinen interessante Vortrag. 
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