GTOPO30
Encyclopedia
GTOPO30 is a digital elevation model
for the world, developed by USGS. It has a 30-arc second resolution (approximately 1 km), and is split into 33 tiles stored in the USGS DEM
file format
.
Digital elevation model
A digital elevation model is a digital model or 3-D representation of a terrain's surface — commonly for a planet , moon, or asteroid — created from terrain elevation data....
for the world, developed by USGS. It has a 30-arc second resolution (approximately 1 km), and is split into 33 tiles stored in the USGS DEM
USGS DEM
The USGS DEM standard is a geospatial file format developed by the United States Geological Survey for storing a raster-based digital elevation model. It is an open standard, and is used throughout the world...
file format
File format
A file format is a particular way that information is encoded for storage in a computer file.Since a disk drive, or indeed any computer storage, can store only bits, the computer must have some way of converting information to 0s and 1s and vice-versa. There are different kinds of formats for...
.
See also
- Shuttle Radar Topography MissionShuttle Radar Topography MissionThe Shuttle Radar Topography Mission is an international research effort that obtained digital elevation models on a near-global scale from 56° S to 60° N, to generate the most complete high-resolution digital topographic database of Earth prior to the release of the ASTER GDEM in 2009...
- Advanced Spaceborne Thermal Emission and Reflection RadiometerAdvanced Spaceborne Thermal Emission and Reflection RadiometerASTER is a Japanese sensor which is one of five remote sensory devices on board the Terra satellite launched into Earth orbit by NASA in 1999...