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ECAI Reference and Documentation

Title: GTOPO30 - Global Digital Elevation Model
Author:
Publisher: U.S. Geological Survey's EROS Data Center (EDC).
Year written or copyrighted: 1998
Contributed by: Jeanette Zerneke, ECAI
Description: GTOPO30 is a global digital elevation model (DEM) with a horizontal grid spacing of 30 arc seconds (approximately 1 kilometer). GTOPO30 was derived from several raster and vector sources of topographic information.
URL: edcdaac.usgs.gov/gtopo30/gtopo30.asp