10! 109 
WAVELENGTH (M) WAVELENGTH CM) 
Measured by D Measured by B 
Fig. 4. Spectra of Bohusldn, Sweden. 
    
     
    
  
    
  
  
    
  
  
     
  
  
  
   
  
  
  
  
Participant Sample spacing Coeff. for straight line approx. 
Ax meter of terrain spectrum 
a E 
-3 
A 30 2.59 1714-10 , 
B 30 2.51 1.88710 , 
D 5 2.141 4.06*10 , 
E 2.5 2.15 4.69‘10 
  
     
  
Table 5, Bohuslän, Sweden. 
Predicted standard deviation for DEM at 4 different grid sizes 
  
   
  
     
    
   
  
  
Participant Ax=10 meters  Axz20 meters  Ax-30 meters Ax=50 meters 
A 0.29 0.50 0.69 1.04 
B 0.34 0.57 0.79 1.14 
D 0.32 0.47 0.59 0.78 
E 0.36 0.53 0.67 0.90 
  
  
   
Table 6, Bohuslán, Sweden.