Full text: Proceedings of the international symposium on remote sensing for observation and inventory of earth resources and the endangered environment (Volume 2)

  
  
  
  
  
  
   
   
  
  
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These present-day satellite images are firstly used as addi- 
tional materials to obtain some planimetry elements (hydrography, 
forests, localities, ways of communications, etc) as fast as pos- 
sible. We can find such examples in Figure 1 showing the Danube 
Delta hydrography at 11250 ooo scale, using Landsat 2 images from 
July 25, 1975,and in Figure 2 showing forests in the Pergani and 
Baraolt Mountains at 1:200 000 scale, using Landsat 2 images from 
July lo, 1975. 
Multispectral images (the present-day imagery is obtain in 
visible and infrared zones of the electromagnetic spectrum) or co- 
lor composite are used to point out some various specific field 
elements. 
Medium and small scale tourist mappings (large photographic 
images having overprinted planimetric, relief and toponymy ele- 
ments) areanother possibility to use satellite images for the abo- 
ve mention subjects; such tourist materials being highly required. 
Relief shading reproduction on images, when Sun is in a favou- 
rable position concerning elevation and azimuth (Landsat satelli- 
tes have a near polar orbit, orbiting at about 9lo km altitude and 
taking imagery at about 15 minutes past 8 a.m. for Romania's sur- 
face) and in hilly ground is quite another use. The Fägäras Moun- 
tains CH ax = 2 543 m) covered by snow at the top are suggestively 
presented in Figure >» (Landsat 2 images from April 2, 1976, en- 
larged at 1:250 ooo scale; Sun is 42 EL and 138 AZI). 
Classical, selected and classified analogic images are fast 
obtained introducing digital imagery in data processing equipment 
(e.g. surfaces covered by water, forest, snow, etc). 
Other possibilities to use satellite images are referring to 
the physical-geographic feature reproduction facility in tourist 
zones presented on maps and contour line plottings, having large 
contour intervals in side stereo overlapping zone (it is about 4o 
per cent in Romania). 
Landsat l and 2 images and Saliut 4 orbiter laboratory photo- 
graphs (1975) have been used in our experiments. 
In present-day tourist mappings,covering either the whole coun- 
try territory or administrative and tourist zones at small scales 
(1:100 000 and smaller ones), satellite images have an impressive 
contribution in solving the above mentioned problems. 
      
  
  
  
  
  
  
  
  
  
  
  
  
  
   
    
   
    
   
    
  
  
  
  
  
   
  
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