The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B4. Beijing 2008 
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Figure 8. Shaded relief HRSC DTM mosaic 
Figure 9. Detail HRSC DTM 
Figure 10. Detail MOLA DTM The mean percentage of 5-ray 
points for all six orbit strips is 78.5%. 
The mean intersection accuracy of all object points used for the 
DTM mosaic is 0.6 multiplied by the nominal nadir resolution. 
This is equivalent to approximately 7.5 m. 
The quality of the derived DTM is well-reflected in the shaded 
relief (see Fig. 8, Fig. 9 and Fig. 10). Of course, compared to 
the MOLA DTM the higher resolution HRSC DTM mosaic 
includes more detail and is altogether more complete. 
Figure 11. Ortho mosaic with superimposed color-coded 
elevation 
Figure 12. 3D-View (part of DTM with false color) 
5. CONCLUSIONS AND OUTLOOK 
The exterior orientation parameters can be improved for a single 
orbit and for image blocks using the bundle adjustment. The 
exterior orientation data that were adjusted in a strip can be used 
for ortho-image mosaics and DTMs, and provides good results 
apart from the elevation difference to the MOLA DTM. The 
results of bundle block adjustment provided the best accuracy 
and adapt the HRSC-derived data to the global Mars-reference 
system very well. So far, four further DTM mosaics of between 
two and eleven orbits have been adjusted using bundle 
adjustment with good results. Further studies shall show that a 
block adjustment with more orbit strips is possible. 
REFERENCES 
Ebner, H., Spiegel, M., Baumgartner, A., Giese, B., Neukum, G. 
and the HRSC Co-Investigator Team, 2004. Improving the