Introduction to the Solar System


APAS 1110 Summer 1996


Cool Image of the Day -- June 5




Topographic Map of the Earth's Surface

This image was generated from digital data bases of land and sea- floor elevations on a 5-minute latitude/longitude grid. Assumed illumination is from the west; shading is computed as a function of the east-west slope of the surface with a nonlinear exaggeration favoring low-relief areas. A Mercator projection was used for the world image, which spans 390 degrees of longitude from 270 degrees West around the world eastward to 120 degrees East; latitude coverage is (+) or (-) 80 degrees. The resolution of the gridded data varies from true 5-minute for the ocean floors, the U.S.A., Europe, Africa, Japan, and Australia to 1 degree in data-deficient parts of Asia, South America, northern Canada, and the Arabian subcontinent.


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