Bas, Hüseyin Gazi 
  
9-8 
  
8.713 
10.060 
  
9.139 
8.939 
  
9.249 - 
8.989 
  
  
The object space coordinates X and Y of the same test points have been computed by using the 
the image coordinates obtained from comparator readings and corrected photo coordinates x*,y*. 
The results are given in table 2. It is obvious from stdying the table 2 that the object space 
coordinates which have been computed by corrected photo coordinates are more accurate than 
the object space coordinates which have been computed by the image coordinates obtained from 
comparator readings. 
Table 2. The object space coordinates of some test points 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
test object space  coordinates| object space coordinates |object space coordinates 
point |obtained fromcomparator obtained from geodetic obtained from corrected 
number |image coordinates measurements photo coordinates 
X (m) X X 
Y Y 
3-3 11.079513 11.114645 11.122076 
10.790114 10.876585 10.878282 
3-9 12.576627 12.615403 12.622721 
10.785714 10.870868 10.872843 
6-6 11.843287 11.862072 11.871973 
10.045959 10.121621 10.121192 
9-3 11.082944 11.117226 11.124333 
9.286360 9.372099 9.368639 
9-9 12.583639 12.615839 12.623193 
9.288823 9.371071 9.368639 
1-4 11.327093 11.363578 11.370919 
11.290125 11.373795 11.379335 
1-5 11.576761 11.613141 11.620811 
11.202287 11.376087 11.381231 
1-7 12.078185 12.115041 12.123653 
11.289078 11.372844 11.380488 
3-4 11.329033 11.365504 11.372030 
10.792502 10.874441 10.879577 
3-7 12.0799979 12.117430 12.124350 
10.784894 10.870146 10.872797 
3-8 12.328749 12.366228 12.373664 
10.784669 10.868909 10.871704 
  
  
  
The mean square value Mx and My which are computed from differences between the geodetic 
coordinates and computed photogrammetric coordinates are given following: 
Mx = 
8.285 mm., My = 10.35 mm. (for the oject space coordinates computed from corrected 
photo coordinates) 
Mx = 
34.324 mm., My = 
uncorrected photo coordinates) 
It is obvious that the object space coordinates computed by using corrected photo coordinates are 
nearer to the geodetic coordinates than the object space coordinates obtained form uncorrected 
photo coordinates. 
5 CONCLUSION 
81.69 mm. (for the object space coordinates computed from 
  
42 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B5. Amsterdam 2000. 
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