Which Dem is better SRTM or aster?

Which Dem is better SRTM or aster?

On technical side, SRTM 30 meter DEM is supposed to be more accurate than ASTER 30 DEM. The reason behind is the technique adopted for DEM derivation. SRTM uses radar observations to construct DEM while ASTER uses stereo imagery and photogrammetric techniques to extract DEM.

What is the resolution of SRTM data?

SRTM data have been enhanced to fill areas of missing data to provide digital elevation data with a resolution of 1 arc-second for global coverage. The Shuttle Radar Topography Mission (SRTM) was flown aboard the space shuttle Endeavour February 11-22, 2000.

What is the best Dem?

5 Free Global DEM Data Sources – Digital Elevation Models

1. Space Shuttle Radar Topography Mission (SRTM)
2. ASTER Global Digital Elevation Model.
3. JAXA’s Global ALOS 3D World.
4. Light Detection and Ranging (LiDAR)
5. Mars Orbiter Laser Altimeter (MOLA)

Which is better, SRTM or Aster resolution data?

Dear Sir ASTER is a 15 m resolution data and SRTM is 3 arc second (90m) so certainly ASTER is better, we have developed set methodoology and was quite successful. Please let me knwo if any help is required. You can download some papers on thsi aspect and report if you wish.

Which is better, SRTM DEM or DEM data?

Neither is perfect–often the SRTM DEM is a DSM, not a DTM, for example. I think SRTM is much better than DEM, because it presents more details and now there is new version of SRTM 1-arc available at http://earthexplorer.usgs.gov/ for all the world.

Which is better for Elevation mapping, STRM or STRM?

But if you want to study of local scale them ASTER is better. Depends on scale, location and physical landscape characteristics of your study area. But generally STRM is better. STRM is the best for elevation. Getting in really late on this, but it really depends what you want to do with the data…

How long does it take for SRTM data to be released?

Previously, SRTM data for regions outside the United States were sampled for public release at 3 arc-seconds, which is 1/1200th of a degree of latitude and longitude, or about 90 meters (295 feet).