Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985rpspr...2...62r&link_type=abstract
In its USSR Rept.: Space (JPRS-USP-85-001) p 62 (SEE N85-22403 13-12) Transl. into ENGLISH from Astronomicheskiy Vestnik (USS
Astronomy and Astrophysics
Astronomy
Elevation, Hypsography, Topography, Venus Surface, Highlands, Plains, Planetary Mapping, Relief Maps
Scientific paper
A cartometric study was made of Venusian relief for ascertaining such morphometric characteristics as the areas and mean elevations of different regions and the surface in general. The measurements were made using the USGS hypsometric map of Venus at 1:50,000,000 in a Mercator projection covering 93.6% of the entire surface; horizontal resolution about 100 km, vertical resolution about 0.1 to 0.2 km. A special technique was used in determining the areas and mean elevations of 22 regions on the planet. Hypsographic curves were plotted for the different regions and a map of Venusian relief averaged for 5 deg grid squares (contours drawn each 0.5 km) was compiled. A table gives the areas and mean elevations of highlands and lowlands on Venus. Mountainous regions occupy 7.4% of the surface; hilly areas -- 54.8%; and low-lands--37.9%. The hypsographic curve for Venus is compared with those for Mars and the Earth, constructed relative to the mean level for each planet. On Venus about 40% of the surface is above the mean level, on Earth about 43% and on Mars about 53%. In the Northern Hemisphere of Venus, plains occupy a greater area (46%) than in the Southern Hemisphere (30%), the same as on the Moon, Mars and Mercury.
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