International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B4. Istanbul 2004
MAP SHEET DESIGNATION
MAP PROJECTION
GRIDLINE SYSTEMS
INDEX TO ADJOINING SHEETS
"ege acie emo Vac Von 1200 000 Sae
IMAGE PROCESSING
HEIGHT INFORMATION
Figure 2. Layout of the Topographic Image Map Mars 1:200,000 series (special sheet M 200k 19.0N/150.3E OMKT, Albor Tho-
lus Region — areas without HRSC image information are shown in grey)
In addition to these designations a sheet is named after a map-
ped feature, where this is possible. Since there are about 1,500
named surface features on Mars, obviously only a small share
of the 10,372 quadrangles could be provided with reasonable
names.
3.6 Marginal Information
Symbols and conventions, on which a map sheet is based, are
explained within the legend. In particular, this contains para-
meters of the projection and the lateral and vertical references
as well as coordinate (or more appositely grid system)
classifications. Furthermore some information on the used
HRSC imagery and its processing is provided.
The position of a map sheet is given within an index map
showing the neighboring sheets of the Topographic Image Map
Mars 1:200,000. Special target maps are localized in an analo-
gous manner with regard to this series. However, having the
sheet location in a *more familiar" context — i.e. the large-scale
series MC 5M and MC 2M respectively — seems quite useful.
Therefore, the concerning quadrangle is referred to in written
form additionally.
872
4. AUTOMATTED MAP GENERATION WITH PIMap
It is evident that the map generation has to be fulfilled
automatically as far as possible. Therefore, the whole
production line is laid out as an entirely digital process with the
cartographic software system PIMap being in the center aS
illustrated in Figure 3. PIMap compiles all map components
according to the user's definitions, which range from simply
choosing a particular sheet out of the series up to Very
individual and comprehensive map specifications. Final
products are digital versions of the maps, which can be printed
on demand or provided in digital formats (Gehrke et al., 2003b).
The cartographic software PIMap was developed in C++ since
late 2001 at the Technical University of Berlin and runs under
both Microsoft Windows as well as Linux environments. It i5
now in use for Mars Express mapping. Starting from the
orthoimages and DTM files (provided in VICAR formal), the
software adjusts these data to the mapped surface by resampling
and fitting. Contour lines are automatically derived and labeled
within PIMap. Furthermore, this basic data set is completed by
grid systems and frame, the related Martian nomenclature an
Pst
EA {u nm
E-- Sep
= > On
