The International Archives ofthe Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B4. Beijing 2008
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Figure 2. Geodetic co-registration check using orthoimage
superimposition (left: CTX-HRSC; right:CTX-HiR!SE)
Figure 3. Multiresolution stereo DTMs compared with each
other over the Athabasca area. Note the TDI array
(e) which could not be corrected due to image noise.
However, 18m CTX DTMs make it possible to depict the shape
of an individual landscape feature such as a medium scale
impact crater (radius > few hundreds of metres) or the shape of
valley and streamline islands. 3.5 m resolution HiRISE DTM
show finescale detail of very flat areas including surface
roughness features. 70cm HiRISE DTMs provides a measurable
sub-metre resolution vertical local roughness. This means that