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GMTOPO30 example map 1 GMTOPO30 example map 2 GMTOPO30 example map 3
GMTED2010 • "The U.S. Geological Survey (USGS) and the National Geospatial-Intelligence Agency (NGA) have collaborated on the development of a notably enhanced global elevation model named the Global Multi-resolution Terrain Elevation Data 2010 (GMTED2010) that replaces GTOPO30 as the elevation dataset of choice for global and continental scale applications. Since the time GTOPO30 was completed, the availability of higher-quality elevation data over large geographic areas has improved markedly. New data sources include global Digital Terrain Elevation Data (DTED®) from the Shuttle Radar Topography Mission (SRTM), Canadian elevation data, Spot 5 Reference3D data, and data from the Ice, Cloud, and land Elevation Satellite (ICESat). GMTED2010 provides a new level of detail in global topographic data. The GMTED2010 product suite contains seven new raster elevation products for each of the 30-, 15-, and 7.5-arc-second spatial resolutions and incorporates the current best available global elevation data..."

GMTOPO30 is my processed version of the GMTED2010 30" mean-elevation dataset. The original monolithic DEM is in the proprietary (and horrible) ESRI Arc/Info Grid format, so I have broken it up into the same 33 tiles as GTOPO30, formatted as plain 16-bit integer rasters and using the same names, making it a drop-in replacement. The only notable difference (aside from improved data) is that the oceans of GMTED2010 have 0 elevation value, whereas GTOPO30 had NODATA value.

See the data page for unpacking instructions.

Dataset  Res   Size bz2   Size un 
gmtopo30.tar.bz2 30" 178 MB 1.7 GB