Shuttle Radar Topography Mission (SRTM) Version 2

NASA has released version 2 of the Shuttle Radar Topography Mission digital
topographic data (also known as the "finished" version). Version 2 is the
result of a substantial editing effort by the National Geospatial Intelligence
Agency and exhibits well-defined water bodies and coastlines and the absence of
spikes and wells (single pixel errors), although some areas of missing data
('voids') are still present. The Version 2 directory also contains the vector
coastline mask derived by NGA during the editing, called the SRTM Water Body
Data (SWBD), in ESRI Shapefile format.

[Summary provided by NASA.]