Physics – Geophysics
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pggp.rept..503w&link_type=abstract
In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1990 p 503-505 (SEE N92-10728 01-91)
Physics
Geophysics
2
Color Coding, Digital Data, Mars Surface, Mathematical Models, Mercator Projection, Relief Maps, Sine Waves, Terrain Analysis, Topography, Contours, Elevation, Gravitational Fields, Mars (Planet), Planetary Geology
Scientific paper
A Digital Terrain Model (DTM) was derived with both Mercator and Sinusoidal Equal-area projections from the global topographic map of Mars at a scale of 1:15 million and a contour interval of 1 km. Elevations on the map are referred to the Mars topographic datum that is defined by the gravity field at a 6.1-millibar pressure surface with respect to the center of mass of Mars. The DTM has a resolution at the equator of 1/59.226 degrees (exactly 1 km) per pixel. By using the DTM, color-coded global maps of Mars' topography were generated in both the Mercator projection and the Sinusoidal Equal-Area projection. On both maps, colors indicate 1 km increments of height. From the equal-are dataset, the positive and negative elevation distributions are calculated to be 67 and 33 percent, respectively.
Ablin Karyn K.
Howington-Kraus Annie E.
Wu Sherman S. C.
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