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Geologic Investigations Series Map I-2787

Pubs Warehouse

### Prepared for The National Aeronautics and Space Administration

# Topographic map of the Parana Valles region of Mars MTM 500k -25/337E OMKT

#### By U.S. Geological Survey

| 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 –25/347E OMKT: Abbreviation for Mars Transverse Mercator; 1:500,000series; center of sheet latitude 25° S., longitude 347.5° E. in planetocentriccoordinate system (this corresponds to –25/012; latitude 25° S., longitude12.5° 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.         | First posted April 4, 2004
-  **Map** PDF (22.3 MB) 
-  **Map** EPS (86 MB)    This map measures approximately 28 x 40 inches and is best reproduced on a large-format plotter at 600 dpi or greater. 

For questions about the content of this report, contact Mark Rosiek

**For additional information, contact:**Astrogeology Science CenterU.S. Geological Survey2255 N. Gemini DriveFlagstaff, AZ 86001http://astrogeology.usgs.gov/

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### Suggested citation:

Geological Survey, (U.S.), 2003, Topographic map of the Parana Valles region of Mars MTM 500k -25/337E OMKT: U.S. Geological Survey Geologic Investigations Series Map I-2787, 1 plate, *https://pubs.usgs.gov/imap/2787/*.

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U.S. Department of the Interior |            U.S. Geological Survey           	URL: *http://pubsdata.usgs.gov/pubs/imap/2787/index.html*            Page Contact Information: GS Pubs Web Contact           	Page Last Modified: Wednesday, 30-Nov-2016 17:41:11 EST