28 
Object (Wall Test Area) 
—^ 
  
  
  
  
Fig. 20 - Convergent 
Stereometric Coverage -- 
  
  
Wels Yn 
Fig, 21 - Tilted 
Photography 
Fig. 22 - The "normal case" 
of photogrammetry 
Object (Woll Test Area) 
  
  
  
  
  
  
Object (Wall)