1 
  
  
  
  
  
  
Unlikely Changes due to low 
Water Fraction Image Values — M: 
AUS, 
0m SEIBERSDORF 
  
  
  
Figure 2: Changes Due to Building Activities from 1986 to 1991 in the North-East of the City of Vienna 
382 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B7. Vienna 1996