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GTOPO30

Summary

GTOPO30 is a digital elevation model for the world, developed by United States Geological Survey (USGS). It has a 30-arc second resolution (approximately 1 km), [1] and is split into 33 tiles stored in the USGS DEM file format.

According to DTED and USGS DEM the absolute vertical accuracy of GTOP30 varies from ±30 meters.[2]

Gallery edit

This map is derived from GTOPO30 data that describes the elevation of Earth's terrain at intervals of 30 arcseconds (approximately 1 km). It uses hypsometric tints instead of contour lines to indicate elevation.

                       
                       
                       
                       
                       
                       
Each tile is available at a resolution of 1800 × 1800 pixels (approximate file size 1 MB, 60 pixels = 1 degree, 1 pixel = 1 minute)

See also edit

References edit

  1. ^ USGS EROS Archive - Digital Elevation - Global 30 Arc-Second Elevation (GTOPO30)
  2. ^ "Accuracy". Archived from the original on July 31, 2017. Retrieved July 26, 2017.

External links edit

  • GTOPO30 Page.