The results from the estimates of the internal relia- 
bility indicates that Bundle adjustment in general has 
a better internal reliability than DLT but the difference 
decreases with the number of control points. 
7. ACKNOWLEDGEMENTS 
The ideas for this investigation originates from 
Professor Kennert Torlegärd, Department of Photo- 
grammetry, Royal Institute of Technology, Stockholm, 
to whom I would like to express my gratitude for 
many fruitful discussions and for his guidance. I 
would also like to thank my college Holger Zielinski 
for his useful cooperation and support. 
REFERENCES 
MCGLONE, J., AND MIKHAIL E. M., AND PADERES, F. C. 
1989. Analytic Data-Reduction Schemes in Non- 
Topographic Photogrammetry. In Non-Topographic 
Photogrammetry. 2nd edition. Karara, H. M., Ed. 
American Society for Photogrammetry and Remote 
Sensing. Ch 4, pp 37-57. 
MIKHAIL, E. M. 1976. Observations and Least Squares. 
IEP-A Dun-Donnelley Publisher. New York. 
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