Tab, 3 Flight arrangements of photogrammetric blocks 
Cross | Change flight| size 
  
Version Side overlap Flights? direction? 
le block | - . 
single} oc 20% no yes 6 x 13 
> ; E60 60% no yes 11x 1 3 
0 e 
CPR E60G 60% no no 11% 33 
D20 20% yes yes 2x6x13 
  
  
  
  
  
correlation between gross control point errors and systematic 
image errors on the block geometry. 
. : 9 
1.0 
0.5 
  
  
  
  
dee {/b 
9.0 A i a ds A i i 
2 . 6 12 9.0 2 4 6 12 us 
a. Gross errors in a b. Gross errors in 
single control point two control points 
Fig.7 Dependence of maximum correlation of gross control 
point errors and all determinable systematic image 
errors on flight arrangement and control interval 
From the investigation by author ( 11,1985 ) the following 
conclusions can be drawn: 
--- Gross image coordinate errors can be fairly separated 
from systematic image errors, while it is usually difficult 
to separate gross control point errors from systematic errors. 
--- The separability of gross control point errors and syste- 
matic image errors is dependent on the block geometry and can 
be improved through cross flights, double points and using 
bigger block size. 
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