(498) 
astronomical proportion as well as microscopic dimensions. In many cases there I greatl 
is no other method available to obtain such measurements as for example those many ii 
concerning features in movement such as water waves. Sometimes the feature is Fu 
so sensitive that it cannot be touched with any kind of measuring tools. The Di 
photographic exposures can be made within very short times and without the con 
touching the object. The photogrammetric model can be established at any time what i: 
and the measurements can be repeated whenever we want. may be 
Further, x-ray photogrammetry gives us the possibility to measure within Th 
objects as for example the human body or different kinds of material. the diff 
Let us consider for a moment how much we would appreciate having single are ava. 
photographs of man made objects, people and events of ages passed. Copies 
Further, what would we be willing to give for stereoscopic pictures of the Ar 
same feature? If we had these photographs we could make detailed studies, 
measurements and accurate reconstructions of those things about which we now 
have only a very meager knowledge. 
It is apparent that nearly everything around us is in some transitory state 
of destruction and that there may come a time when the rate of this destruction 
will be very rapid. Photogrammetry represents a most powerful tool, not to 
prevent destruction, but to permit an accurate, ageless reconstruction. To my 
knowledge, the use of such a powerful tool for this and many other important In 
purposes is not yet in widespread use. It is my hope that the work of this Com- discover 
mission can go far toward correcting this condition. tion we: 
In many sciences there is a growing need for improved measuring methods. ner, Tt. 
Often the opinion is heard that at least in natural sciences the measuring tech- Fr 
nique becomes more and more important and that there are several sciences of roen 
in which the measuring has become nearly a part of the science itself. Here too special | 
photogrammetry has much to offer. Th 
A survey of the answers to commission V questionaires indicates that today roentgei 
the non-topographic photogrammetry is not used as much as is be expected Em 
although considerable development can be noted. The reasons for this situation strated 
are probably several. scalpel | 
The need for mapping in the world is so great that most photogrammetrists fields b 
have to deal with aerial photogrammetry. Instruments for non-topographic are felt, wa 
not yet available to meet the need. The knowledge about photogrammetry is connect 
still too limited among people other than the photogrammetrists. Also among Th 
photogrammetrists themselves there is sometimes too little knowledge about or research 
interest in the methods and possibilities of non-topographic photogrammetry. aspect, 
We will have to work hard to improve these conditions. The manufacturers Scarica 
of photogrammetric instruments must be stimulated and guided to make new made i 
types of cameras and other facilities. There must be a closer cooperation between roentoci 
photogrammetrists and other scientists who may profit by the use of photo- Th 
grammetry. Finally, photogrammetric training must be expanded to non-topo- made d 
praphic photogrammetric methods. also har 
I know that this congress can contribute in many ways to the development market. 
and increased use of non-topographic photogrammetry. There are countless big gramsm 
fields of application waiting for photogrammetric aid and the gains to be ex- . De 
pected are very great. pairscon 
From the following papers that are to be presented in commission V we RR 
will learn many details of the application of non-topographic photogrammetry.