SRTM: NASA Shuttle Radar Topography Mission

The wonderful SRTM project has the potential to provide global elevation data at up to 30m (1 arc-second) resolution, worldwide!  For a description of the project, see the NASA/JPL SRTM site.

Acquiring the data

Global 1km data: SRTM30SRTM comparison

History

Drawbacks

Improved SRTM

Tools