International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B7. Istanbul 2004 
  
  
  
  
  
100 I po p 
* go} P i | : | d 
X a : 
D / Ap : 
= eo} 5 : : = 
2 40 - / ; : 3 : zl 
> Pr : : 
= / : 
© 20 E : i ; - 
— / W/o Intervisibility —— — 
je With Intervisibility 
0 L ] 1 1 
0 50 100 150 200 250 
# Observers 
Figure 1: Joint Visibility Indexes, With and W/o Requiring 
Intervisibility, as Observers are Added 
  
du adi as 
Figure 4: Cell Used to Test Varying Horizontal and Verti- 
cal Resolutions 
  
  
  
  
  
100 | Ï T Ï 
80 | A | - 
x Freeney — + ] 
2 60 - ; iA S - 
= | | : 
B 40r J 
2 : : 
> F : 4 
20 |- Hires + - 
; ; ; Lo res ---x 
Figure 2: Joint Viewshed of 60 Observers on Lake Cham- I Transferred res ---%--- | 
plain W, Without Intervisibility 0 
3 10 30 100 300 1000 
Resolution Reduction Factor 
Figure 5: Effect of Reducing Vertical Resolution 
  
  
  
  
  
  
100 T T T 
80 vi 2 
x 3 kcu. ac eR EA A ud 
© : - 
£ 60 r adie Tg eh A 
= r : ; A ng 
a 40r: : : 1 
0 : : 
> F : : : 1 
20 r--— : i sit Hires ——— — 
Lores 7X | 
[ Transferred res ---x--- 
0 | | | 
2 3 4 
Resolution Reduction Factor 
Figure 3: Joint Viewshed of 60 Observers on Lake Cham- Figure 6: Effect of Reducing Horizontal Resolution 
plain W, With Intervisibility 
1200 *