Hole-filled SRTM 90m Digital Elevation Data (V4.1)

Contact Mark Mulligan . Click here to access the data (requires Google Earth version 4 or above). How to use (video) (requires Adobe flash ). If your version of Google Earth shows errors when downloading zipped data files from these sites, please right mouse button click the links to the data and choose save link from the context menu that appears. This will then open the link in your web browser.

Welcome to TOPOVIEW : the Google Earth interface for the SRTM data (V4.1)

Once loaded into Google Earth, if you tick 'Elevation' under 'Temporary places', each of the grids that you see represents a 5 by 5 degree tile and contains a placemark which links to approx. 90m resolution digital elevation data. The data originate in the NASA Shuttle Radar Topographic Mission (SRTM) data held at the National Map Seamless Data Distribution System . The data have been processed by Dr. Andrew Jarvis of the CIAT Land Use project , in collaboration with H.I. Reuter, A. Nelson and E. Guevara to fill in data voids and produce a seamless mosaic.

Hole-filled SRTM data visualisation and download in Google Earth

This is version 4.1 of the CSI-SRTM data with improved hole-filling algorithms which make use of ancilliary data sources where they are available.

See the full documentation at CGIAR-CSI here. The data are available here for download or visualisation as Google Earth overlays using a locally- or globally-specific legend. The original 5 degree tiles are also sub-tiled for those users requiring data for smaller areas. The visualisation, subtiling and Google Earth KML interface were developed by Dr Mark Mulligan of Kings College London . The data can be accessed from servers at Kings College London, UK The data are available in zipped ARCASCII and zipped GEOTIFF formats, in the geographic coordinate system, WGS84 datum as 5 degree or 1 degree tiles. Each tile has an associated MASK file that indicates the areas in which data holes have been filled.

TOPOVIEW : Terrain view for the northern Andes

See also:

Andy Jarvis, Jorge Rubiano, Andy Nelson, Andrew Farrow and Mark Mulligan (2004) Practical use of SRTM data in the tropics – Comparisons with digital elevation models generated from cartographic data. CIAT working document No 198. [available online: http://srtm.csi.cgiar.org/PDF/Jarvis4.pdf]