^34. 
for incorporating the problems related to developing countries 
into the field of activities of ISP as a valuable contribution 
to promoting photogrammetric research. 
Here the importance of mapping in developing countries to 
photogrammetric research has been emphasized. InPpracti6e) 
however, this would presuppose that the material is made 
available to research workers and that the results of research 
may be published. 
Although à considerable part of these works are financed by 
various States, they are usually undertaken and executed by 
private firms specialized in the said field. Thus the material 
and information on the results seldom rearch the research 
workers concerned. Even if the reason for avoiding publicity is 
often based on purely commercial interests, this need not 
always be the case. 
Private firms offering photogrammetric services are seldom 
directly involved in research work and thus lack a motive to use 
the material at their disposal for scientific purposes. This 
most probably is the reason why so little is known about these 
most interesting works. The publicity is usually limited to 
quite general reports serving commercial interests. 
Here ISP might play an important role. This would involve 
following the progress of photogrammetric activities in the 
developing countries, preparing statistios and spreading 
information. The cooperation of existing regional centres could 
be of great value in this activity. Furthermore, the