22 
air pollution has been elaborated by out staff. This method is 
widely applied in practice. Further research aims at replacing 
false colour photographs with multispectral photographs; we are 
also planning to develop a method for surveying deciduous 
forests. 
Environmental protection has an important place on out list of 
research problems* Several issues related to this discipline 
have already been mentioned. Complicated problems connected 
with preservation of natural environment have to be tackled in 
every sphere of economic activity of men. I would like to draw 
your attention to the importance of research on the quality of 
water and water protection. In this respect the main contribu 
tion of our team was research on the influence of heated waters 
discharged from industrial plants into natural water bodies. 
The technology based on the interpretation of thermal images 
taken from aircraft or helicopter elaborated by the staff of 
the Institute is now routinely applied. Quantitative analysis 
of the influence of heated industrial waters on natural streams 
has also been successfully performed. Analog interpretation of 
multispectral satellite images of Great lakes region /north 
eastern Poland/ has rendered very interesting results* The 
works in this field also embrace industrial air pollution, 
vegetation damage in the vicinity of industrial plants and high 
ly urbanized areas, research on fires and temperature distri 
bution in abandoned mines and damps as well as on other pro 
blems related to the preservation of the natural environment. 
INTERNATIONAL ACTIVITIES OP POLAND IN 
THE PIELD OP REMOTE SENSING 
Poland’s international activities in the field of remote sen 
sing take on several forms. It is understandable, that with the 
growth of our centre, the amount of international contacts in 
which our side is an active one, sharing experience with part 
ners will be increasing. It is also “understandable, that up till 
recently we were pursuing such forms of international coopera 
tion which enabled our staff to gain knowledge and experience. 
Very large number of training programs completed in world lea 
ding remote sensing centres is a consequence of this approach. 
The members of our staff have undergone training in such lea 
ding centres as: Canada Centre for Remote Sensing /Ottawa/, 
Eros Data Centre /Siouxs Palls, USA/, Purdue University /Lafa 
yette,USA/, ITC /Enschede, Netherlands/, Institute Géographique 
National /Prance/, PAO Headquarters /Rome, Italy/. Some of these 
training programs resulted in elaboration of remote sensing data 
on Polish territory. Senior specialists from our centre have 
acquired thorough knowledge on the organization of remote sen 
sing centres during short visits to European and North American 
organizations. Close cooperation with numerous remote sensing 
centres and organizations in several countries is the result of 
these visits. The visits paid to Canada and the United States 
of America in 1976 and to Sweden in 1977 by our delegation 
headed by the President of the Head Office of Geodesy and Carto 
graphy are of special significance. Also' the 1977 visits to 
Prance and the Netherlands were very fruitful.