Data pre Processing (DEM)

• USGS 30 arc second

• • source: International Map of the World (1:1,000,000; 100 meters contour);
  • accuracy: vertical accuracy expressed as + or - 50 meters linear error at 90 percent confidence level; can also be described as a RMSE of 30 meters;

FOR MORE INFO on GTOPO30...

Readme file at

http://edcwww.cr.usgs.gov/landdaac/gtopo30/README.html

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