Ground Control Points 
  
  
  
  
  
  
  
  
  
Country | Orgl| 5.1 5.218 5.21b 5.21e 5.22 5.23 
No. ; 
Union of | 1 4 Yes No Yes Yes x,y 1/5 000 M. ; i.e. 
South + 
Africa for 1:1000 = 6 cm 
for 1:5000 = 30 cm 
24 1/20 contour interval 
T 
2 3 ho- | Yes No Yes Yes Horiz. = 0,2mm Qt) 
riz. Accura- + 
4 cy spe- |Vert. = 0,05% H 
vert. cifies 
contrac- 
tor for 
each 
map 
3 6 for |For No For Yes Scale Horize Vert. 
$0200 1:1200 114800 1:1 200 230 cm M cm 
every 1:4 800 *60 em 230 cm 
5th gel 
reopair 
for 
134800 
United à 4 ho- | Yes No Yes Yes Horizontal and vertical 
States of riz. Plus — 4th order or better 
America and HIRAN 
vert. 
2 5 Yes No Yes Yes Horizontal qui order. 
Vert. : 1/10 countour inter, except 
for 1"= 50’, which is held to +3 cm 
3 20 Yes No No No - wo m 
for 
photo 
-SC&- 
le 
133000 
| x nd rd 
4 4-5 Yes No Yes res Base 2 and 3 order. 
BALPLEX Depends on scale. 
  
  
  
  
  
  
  
  
  
  
  
  
    
   
  
  
  
    
    
   
   
   
    
   
  
   
     
     
   
    
    
   
    
    
      
C 
ountry