of hectars of interpreted areas/. The following table shows the results of 
two years work. 
  
  
  
  
  
  
  
  
INTERPRETATION HECTARS 
Geology 440 000 
Hidro geology 331. 000 
Land use 489 000 
TABLE N°2 
It must be pointed out, that the basic informations have very little change 
over a certain time period except informations connected to the land use. 
Therefore the future role of the system is to incorporated more detailed 
information /higher resultion, larger scales/ and use of photography for ot- 
her purposes /map production, map revision, etc./ 
936 
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