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ETOPO1 Global Relief ModelPreliminary Release - in Review (Minor Revision August 29, 2008) 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, and is available in "Ice Surface" (top of Antarctic and Greenland ice sheets) and "Bedrock" (base of the ice sheets) versions. Historic ETOPO2v2 and ETOPO5 global relief grids are deprecated but still available. Available Versions
ETOPO1 Ice Surface: Grid of Earth's surface that depicts the top of the Antarctic and Greenland ice sheets.
ETOPO1 Bedrock: Grid of Earth's surface that depicts the bedrock underneath the ice sheets. Relief for the rest of the world is the same in both versions. Available Registrations
Grid/node-registered: where cells are centered on lines of latitude and longitude (21601 by 10801 cells).
Cell/pixel-registered: where cell edges are along lines of latitude and longitude (21600 by 10800 cells). The grid-registered is the authoritative registration for each version. The cell-registered was derived from the grid-registered version and the conversion produces slightly flattened relief. Download whole-world grids in multiple formats
* ArcGIS users - use binary float and convert using 'Float to Raster'
Custom Grids
Online: Custom regional grids can be created online from ETOPO1 using NGDC's Grid Translator;
Desktop/Offline: For both cell-centered and grid-centered downloaded grids, custom grids with user-defined bounds can be created in multiple formats, using the desktop version of Grid Translator, part of the free GEODAS Windows Software for Online Downloads and GEODAS XWindows Software. How to Cite ETOPO1:
Amante, C. and B. W. Eakins, ETOPO1 1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis, National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce, Boulder, CO, July 2008.
ETOPO1 Draft Development Report (.PDF)
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