ASTER Global DEMs
The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Global Digital Elevation Model (GDEM) was developed as a joint effort by NASA (the US National Aeronautics and Space Administration) and METI (Japan's Ministry of Economy, Trade and Industry). The GDEM product is produced from stereo pair images, with vertical RMS error of approximately 10 to 25 meters. There are currently two versions of this product, called GDEM 1 (released in 2009) and GDEM 2 (released in 2011). Although it has been argued that the quality of these DEMs is not as good as SRTM, it has a greater global coverage spanning -83 (south) to 83 (north) degrees of latitude. This exceeds the SRTM coverage of -56 (south) to 60 (north) degrees of latitude.
How to Import
Choose Import DEM → GeoTIFF from the File menu and then select the file, which will usually have the filename extension "*.tif".
ASTER imagery from NASA (U.S. National Aeronautics and Space Administration) and METI (Japan's Ministry of Economy, Trade and Industry)
Data can be downloaded from the USGS Land Processes Distributed Active Archive Center (LP DAAC).
Main Page: https://lpdaac.usgs.gov/products/aster_products_table/astgtm
Other ASTER Products: https://lpdaac.usgs.gov/products/aster_products_table
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