DATA SOURCE

WEB PAGE ADDRESS

NAME

RESOLUTION

FORMAT

COST

DESCRIPTION

NASA

ftp://e0srp01u.ecs.nasa.gov/srtm/version2/SRTM3/

SRTM3

90 metre

HGT

Free

The Shuttle Radar Topography Mission (SRTM) obtained elevation data on a near-global scale to generate the most complete high-resolution digital topographic database of Earth. SRTM consisted of a specially modified radar system that flew onboard the Space Shuttle Endeavour during an 11-day mission in February of 2000.

National Geospatial-Intelligence Agency (NGA)

http://geoengine.nga.mil/geospatial/SW_TOOLS/NIMAMUSE/webinter/rast_roam.html

DTED Level 0

900 metre

DT0

Free

Provides a gross representation of most of the earth's surface for general modelling and assessment activities.

National Oceanic and Atmospheric Administration (NOAA)

http://www.ngdc.noaa.gov/mgg/topo/globe.html

GLOBE

1,000 metres

Binary raster

Free

GLOBE is an internationally designed, developed, and independently peer-reviewed global DEM.

http://www.ngdc.noaa.gov/mgg/fliers/01mgg04.html

ETOPO2v2

3,600 metres

NetCDF and raw binary

Free

ETOPO2v2 was generated from a digital data base of land and sea- floor elevations on a 2-minute latitude/longitude grid

ASTER Global Digital Elevation Model

ftp://e0srp01u.ecs.nasa.gov/srtm/version2/SRTM3/Australia/

ASTER GDEM

30 metre

Tiff

Free

ASTER GDEM is an easy-to-use, highly accurate DEM covering all the land on earth, and available to all users regardless of size or location of their target areas.