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5 CONCLUSIONS 
According to the results shown above, the rigidity and robustness of the proposed algorithms have been demonstrated. 
A higher level of automation for extracting spatial information and providing control is achieved and there is no 
manually selected GCPs required. The quality of the automatically generated GCPs assures that reliable ground control 
is provided. Geocoding employing the DEM generated using the stereo-SAR method is practical in moderate relief 
areas, provided that layover effects on SAR imagery are minimal. 
ACKNOWLEDGMENTS 
The authors are grateful to RADARSAT International (RSI) for providing the RADARSAT SAR images under the 
Application Development and Research Opportunity (ADRO) Programme. P.-H. Chen is grateful to the Government of 
the Republic of China and the Chung Cheng Institute of Technique for the full sponsorship of overseas Ph.D. study at 
University College London in U.K. 
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International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part Bl. Amsterdam 2000. 45