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ETOPO1 is a 1 arc-minute global relief model of Earth''s surface that integrates land topography and ocean bathymetry. It was built from numerous global and regional data sets. It contains two elevation bands: ice_surface and bedrock.
Elevation at ground level and at the base of the Antarctic and Greenland ice sheets
Elevation at ground level and at the top of the Antarctic and Greenland ice sheets
It is not necessary to obtain written permission to use ETOPO1 or other NOAA products that are in the public domain, nor are there any fees for using them. We ask only that you cite NCEI as source.
Amante, C. and B. W. Eakins, ETOPO1 1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis. NOAA Technical Memorandum NESDIS NGDC-24, 19 pp, March 2009.