ing 
age 
ive 
est 
ince 
lere 
are 
nts 
ase 
and 
nd 
of 
  
  
2 Né à 55 
  
self calibration simultaneous adjustment 
bundle adjustment 
Fig. 8 increasing rates of accuracy by simultaneous adjustment 
For case 2, simultaneous adjustment showed improved geometric 
precision and improved accuracy of check points. 
It was shown in this study that, only significant AP's are 
sufficient to improve accuracy for cases where accurate GCPs 
are used, but for cases where this is not possible such as 
inaccessible areas, a simultaneous adjustment method is 
necessary which uses gross errors elimination method added to 
the self calibration bundle adjustment method with AP's. 
4, CONCLUSION 
The followings can be concluded from this study which studied 
the accuracy improvement methods of three dimensional 
positioning using the SPOT imagery. 
1. The optimal exterior orientation polynomial for each 
preprocessing level was determined through analysis of various 
exterior orientation polynomial which is shown as a function 
of the number of scanned lines. 
2. Analysis of 1AP photographs with accurate ground controls 
with the developed self calibration bundle adjustment program, 
Showed accuracy of less than 10 M in both planimetry and 
height, a validation of this program. 
3. For inaccessible areas where accurate GCPs are difficult to 
get, self calibration bundle adjustment could not improve the 
accuracy as much as the simultaneous adjustment which combines 
the gross errors detection and elimination method to the self 
calibration adjustment. 
Appreciation is showd to ADD( Agency for Defense Development) 
which has funded this study(UD900013). 
377 
REFERENCE 
10. 
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