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I need to download a DEM in WGS format for Nepal ( around 86 degrees longitude and 27 degrees latitude), that can be exported to a GIS as raster for analysis. Does anyone know of any good, free data source?

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    You might want to add the resolution you are looking for also. – John Powell Dec 12 '14 at 10:37
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If you go to the Earth Explorer web site you can download several DEMs. For Nepal they have the 30m AsterGDEM and the 90m Void Filled SRTM. The 1 arc second (30m) SRTM is not available yet (12/12/2014) but I believe it should be ready in the near future

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    Another source for a void filled 90m SRTM DEM is CGIAR - they implemented Reuters (2007) improvement algorithms. – Kersten Dec 12 '14 at 14:11
  • 30m SRTM is now available at Earth Explorer. – Thomas Stanley Apr 29 '15 at 21:43
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Theres SRTM data available. See https://en.wikipedia.org/wiki/Shuttle_Radar_Topography_Mission for more information.

Note that SRTM hat a ground resolution of approx. 30 or 90 meters ( 1 and 3 arc-seconds, respectively). That is probably the highest-resolution free dataset available.

For more detailed DEMs you should contact local Nepali governments/universities.

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