Data:SRTM: Difference between revisions
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{{Data description | {{Data description | ||
|One-line data description=Shuttle Radar Topography Mission (SRTM) | |One-line data description=Global topography from NASA's 2000 Shuttle Radar Topography Mission (SRTM) | ||
|Extended data description=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 between 56 degrees south and 60 degrees north latitude. SRTM consisted of a specially modified radar system that flew onboard the Space Shuttle Endeavour during an 11-day mission in February of 2000. | |Extended data description=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 between 56 degrees south and 60 degrees north latitude. SRTM consisted of a specially modified radar system that flew onboard the Space Shuttle Endeavour during an 11-day mission in February of 2000. | ||
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longitude, and SRTM3 (for the world) sampled at three arc-seconds. Three arc-second data are generated by three by three averaging of the one arc-second samples. | longitude, and SRTM3 (for the world) sampled at three arc-seconds. Three arc-second data are generated by three by three averaging of the one arc-second samples. | ||
|Upload image dataset=SRTM cover map.jpg | |Upload image dataset=SRTM cover map.jpg | ||
|Caption dataset image=SRTM | |Caption dataset image=SRTM coverage map of Earth | ||
}} | }} | ||
{{Data format | {{Data format | ||
|Data type=Topography | |Data type=Topography | ||
|Data origin= | |Data origin=Measured | ||
|Data format=BIL | |Data format=BIL | ||
|Data resolution=3 arc | |Data resolution=3 arc-second (~90 m) cell size (global), 1 arc-second (~30 m) cell size (U.S.) | ||
|Data projection=WGS 84 ellipsoid | |||
}} | }} | ||
{{Dataset coverage | {{Dataset coverage | ||
|Data spatial coverage= | |Data spatial coverage=Global: 56 degrees South to 60 degrees North latitude | ||
|Data temporal coverage=Time snap shot | |Data temporal coverage=Time snap shot | ||
|Data time period covered=2000 | |Data time period covered=Feb 2000 | ||
}} | }} | ||
{{Dataset availability | {{Dataset availability |
Revision as of 14:31, 24 March 2013
SRTM dataset information page
Short Description
SRTM coverage map of Earth |
Statement: Global topography from NASA's 2000 Shuttle Radar Topography Mission (SRTM)
Abstract: 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 between 56 degrees south and 60 degrees north latitude. SRTM consisted of a specially modified radar system that flew onboard the Space Shuttle Endeavour during an 11-day mission in February of 2000.
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.
Version 2.1 is a recalculation of the SRTM3 (nominal 90 meter sample spacing) version made by 3x3 averaging of the full resolution edited data. Version 2 had been generated by masking in edited samples from the lower-resolution publicly released by the NGA, and contained occasional artifacts, and in particular a slight vertical “banding” in databeyond 50° latitude. These have been eliminated in Version 2.1
SRTM data are distributed in two levels: SRTM1 (for the U.S. and its territories and possessions) with data sampled at one arc-second intervals in latitude and longitude, and SRTM3 (for the world) sampled at three arc-seconds. Three arc-second data are generated by three by three averaging of the one arc-second samples.
Data format
Data type: | Topography |
Data origin: | Measured |
Data format: | BIL |
Other format: | |
Data resolution: | 3 arc-second (~90 m) cell size (global), 1 arc-second (~30 m) cell size (U.S.) |
Datum: | WGS 84 ellipsoid |
Data Coverage
Spatial data coverage: Global: 56 degrees South to 60 degrees North latitude
Temporal data coverage: Time snap shot
Time period covered: Feb 2000
Availability
Download data: http://dds.cr.usgs.gov/srtm/
Data source: http://www2.jpl.nasa.gov/srtm/