Teint. 
owance 
25 000 
0,5 
  
german Dem. 
Republic 
Hungary 
Sweden 
1 
1 
2 
- 68. 
Notes to 5. 
Ground Control Points. 
Ad 5.23 
AG 5.23 
Ad 5.23 
Mean planimetric errors 
control points for AT: 
  
  
   
   
    
    
     
   
  
   
    
    
     
       
   
   
   
   
    
of ground 
M, 1:1 000 m,-- 10 em 
1:2 000 m == 20 cm 
Horizontal: 
M, 1:10 O00 mean er.  max.er. 
Basic control x 0, 5m t 1,0m 
Double image + + 
photogr. — 1,0m - 2,0m 
Single image + + 
photogr. -2,9m - 5.0m 
Vertical: 
basic interval mean er. max.er. 
in = O,2m : O, 4m 
+ + 
2m —- O,4m - QOO 
+ + 
2 9i = 0, 3m - 1,0m 
5, Om : 1,0m 2 , Om 
Tolerances for maps 1:2 000-1:4 000 
are not fixed yet. 
Groundcontrol points must be measu- 
red geodetically with the same accu- 
racy as the points of the correspon- 
ding network. Plans for urban planning 
must belong to one of four standard 
classes. The control points however. 
belong only to two accuracy classes: 
fine survey and ordinary survey. For 
each of those standard- and accuracy 
classes are governmentally stated 
accuracy rules etc. These rules and