The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B4. Beijing 2008
1007
Mars
Overview of Mapped Regions
Map Projections image Data
Simple Cylindrical Priifeclos Viking Merged ipdsrrsaps.wr. issgs.gov)
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Adopted Figure
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Editor
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«W Geodesy end Geoirtformation Science
Figure 1. Location of mapped regions on Mars, based on Viking color data (USGS, 2007). Due to the small scale, individual map
sheets cannot be shown.
Systematic mapping in larger scales, i.e. 1:100,000 and
1:50,000, can be achieved by dividing standard sheets into
quarters and sixteenth, respectively. The suitability of high
quality HRSC data, which are both acquired under optimum
conditions and adeptly processed, for mapping in those scales
has been demonstrated in Iani Chaos: A triplet of topographic
image maps, a standard product within the regular sheet lines of
the series, “M 200k 2.00S/343.00E OMKT”, and two derived
maps, “M 100k 2.50S/343.50E OMKT” and “M 50k
2.25S/343.25E OMKT”, has been generated (Gehrke et al.,
2006a).
3.2 Special Target Maps
Especially in the early stage of the Mars Express mission map
sheets needed to be adapted to individual orbits by location
and/or scale. The very first HRSC map, e.g., was a special
target map of Hydraotes Chaos in 1:100,000 (Albertz et al.,
2004). The “Topographic Image Map Mars 1:400,000, M 400k
11.50N/312.00E OMKT, Sabrina Vallis Region” with
additional information from the Catalog of Large Martian
Impact Craters has been presented in 2007 by Gehrke et al.
(2007b).
cooperation with other HRSC team members. Exemplary
products are a geologic map of Gusev area (Albertz et al.,
2005b) and a combined topographic- thematic map illustrating
the geomorphology of Centauri and Hellas Montes (Lehmann et
al., 2006). The most recent thematic product is a special target
map of the Hale-Bond region by Hiesinger et al. (2007). In this
area, the putative outflow channel Uzboi Vallis is heavily
modified by the two impact craters. The valley floor is
characterized by relatively smooth terrain between morpho
logically sharp blocks of eroded ejecta material (Figure 3).
3.4 HRSC DTM Test support
It is evident that DTMs in highest quality are indispensable for
the derivation of accurate contour lines. Besides systematic
processing of all HRSC data (Scholten et al., 2005), several
enhancing and alternative approaches (Albertz et al., 2005b;
Gwinner et al., 2005) exist, which have been compared in the
HRSC DTM Test (Heipke et al., 2007). Part of the evaluation
process was the assessment of the contour line quality. For this
purpose, topographic map sheets from all delivered DTMs in
two different test areas, Nanedi Valles and Candor Chasma,
were generated. These sheets follow the layout and scale of the
standard map series.
3.3 Thematic Maps
Several thematic map products have been generated in
