ETOPO2v2 Global Gridded 2-minute Database
ETOPO2v2 is deprecated, the current relief model is ETOPO1
Two-minute gridded global relief for both ocean and land areas are available in the ETOPO2v2 (2006) database. ETOPO2v2 replaced ETOPO2 (2001). The historic 2-minute (ETOPO2v2) and 5-minute (ETOPO5) data are deprecated, but still available. Please use the new ETOPO1 Global Gridded Relief Model.
ETOPO2v2c: Cell Centered (pixel registered, where the cell boundaries are lines of even minutes of latitude and longitude, centered on intersections of lines of odd minutes of latitude and longitude).
ETOPO2v2g: Grid Centered (gridline registered, with cell boundaries defined by lines of odd minutes of latitude and longitude, meaning that cells were centered on the integer multiples of 2 minutes [even minutes] of latitude and longitude).
The cell-centered grid is the authoritative version. The grid-centered version was derived from the cell-centered grid and the conversion produces slightly flattened relief.
Download whole world grids in multiple formats:
Online: Custom grids can be created online from the ETOPO2v2c using NGDC's online 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 ETOPO2v2
ETOPO2v2 Global Gridded 2-minute Database, National Geophysical Data Center, National Oceanic and Atmospheric Administration, U.S. Dept. of Commerce, http://www.ngdc.noaa.gov/mgg/global/etopo2.html.