ETOPO5 Data Set
ETOPO5 (Earth Topography 5-minute) is a gridded elevation (land) and bathymetry (sea floor) data set for the entire Earth at a grid spacing of 5 minutes (1/12 of a degree or 300 arcseconds). The entire data set consists of a single file which has 4320 columns and 2160 rows. This data set was compiled using data from many different sources by the National Geophysical Data Center (NGDC), which is part of the National Oceanic and Atmospheric Administration (NOAA). Most of the data set dates to 1988, except for a small area in Canada that was regridded in 1990. Elevation values are stored in a flat binary file (row major, no header) as signed 2-byte integers, and are available with both the LSB (least significant byte first) and MSB (most significant byte first) byte orders. The elevation units are meters.
National Geophysical Data Center (NGDC) of the National Oceanic and Atmospheric Administration (NOAA)
This data set provides global coverage and can be obtained free of charge from NGDC/NOAA.
ETOPO5 Main: http://www.ngdc.noaa.gov/mgg/global/seltopo.html
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