Summary
This map, compiled photogrammetrically from Viking Orbiter stereo image pairs, is part of a series of
topographic maps of areas of special scientific interest on Mars.
MTM 500k –15/337E OMKT: Abbreviation for Mars Transverse Mercator; 1:500,000 series; center of
sheet latitude 15° S., longitude 337.5° E. in planetocentric coordinate system (this
corresponds to –15/022; latitude 15° S., longitude 22.5° W. in planetographic coordinate
system); orthophotomosaic (OM) with color coded (K) topographic contours and
nomenclature (T) [Greeley and Batson, 1990].
The figure of Mars used for the computation of the map projection is an oblate spheroid (flattening of
1/176.875) with an equatorial radius of 3396.0 km and a polar radius of 3376.8 km (Kirk and others,
2000). The datum (the 0–km contour line) for elevations is defined as the equipotential surface (gravitational
plus rotational) whose average value at the equator is equal to the mean radius as determined by
Mars Orbiter Laser Altimeter (Smith and others, 2001).
The image base for this map employs Viking Orbiter images from orbit 651. An orthophotomosaic was
created on the digital photogrammetric workstation using the DTM compiled from stereo models. Integrated
Software for Imagers and Spectrometers (ISIS) (Torson and Becker, 1997) provided the software
to project the orthophotomosaic into the Transverse Mercator Projection.
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First posted April 4, 2003
For questions about the content of this report, contact Mark Rosiek
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