Also, the development going on within photogrammetric 
industry are interesting. Recently, some of the 
manufacturers that until now have been known Primarily as 
hardware producers have announced products where the 
companies only make the software, basing the system 
otherwise on standard computer workstations. These can be 
interpreted as a symptom of the trend in which 
photogrammetry is increasingly based on the use of digital 
techniques. Obviously, it is important that efficient tools 
and techniques are used for the product development - for 
the software development. 
For software production organisations it might be easier to 
adopt internal standards about tools and techniques, 
Opposite to academic and research oriented organisations. 
In production organisations the benefits are more obvious, 
very often they can be interpreted in economical terms. 
Perhaps also the continuity of such efforts can be 
guaranteed more easily. But also within the academics there 
is need for standard tools for software to be used for 
photogrammetry. Taken education, it would be beneficial to 
have a standard language or language extension where we 
could directly use for photogrammetry typical data types 
and operations. The existence of such a tool would make the 
experimentations easier because it would be possible to 
concentrate on the problem at hand, without worrying about 
the underlying technical details. Also information exchange 
would benefit of a commonly used high level notation. 
ACKNOWLEDGEMENT 
This paper was prepared during my stay at Purdue University 
and National Research Council of Canada. I wish to thank 
people in both organisations for the support. 
REFERENCES 
ANSI/IEEE, Std 729-1983: Glossary of Software Engineering 
Terminology, approved by IEEE Standards 
Board, September 23, 1982 and American 
National Standards Institute, August 9, 1983 
ANSI/MIL-STD-1815A-1983: The Programming Language Ada 
Reference Manual, American National 
Standards Institute, 330 pages (available 
for example in Lecture Notes in Computer 
Science, Number 155, Springer-Verlag) 
AT&T, 1984: C++, Release E, ATZT Bell Laboratories, 
November 1984. 
Booch, G., 1985: Object-Oriented Development, IEEE 
Transactions on Software Engineering, 
Volume SE-12, Number 2, February 1986 
pp. 211-221 
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