Where can I download Aster GDEM?

The GDEM and ASTWBD are available for download from NASA Earthdata and Japan Space Systems. This ASTER product is available at no charge for any user pursuant to an agreement between METI and NASA.

How do you use Aster GDEM?

You may zoom in, create polygon features, or enter path/row information to select your area of interest. Then select Digital Elevation, then ASTER GLOBAL DEM, and click Results. These data may be packaged in many tiles. You can turn on or off individual tile footprints and immediately download each tile.

What is the difference between SRTM and DEM?

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 Aster elevation?

The Terra Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Global Digital Elevation Model (GDEM) Version 3 (ASTGTM) provides a global digital elevation model (DEM) of land areas on Earth at a spatial resolution of 1 arc second (approximately 30 meter horizontal posting at the equator).

What is the spatial resolution of Aster DEM?

15 meters
The spatial resolution is 15 meters (m) in the horizontal plane. Each scene consists of 4,100 samples by 4,200 lines which corresponds to about 60 kilometers (km) by 60 km ground area.

What are Aster images?

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) is an imaging instrument onboard Terra, the flagship satellite of NASA’s Earth Observing System (EOS) launched in December 1999. ASTER data are used to create detailed maps of land surface temperature, reflectance, and elevation.

How do I download Aster GDEM data?

1. Search for ASTER GDEM at the top left.
2. Pick the area.
3. Get the list of URLs you want, and save as a text file.
4. You will need a NASA account, and be logged in on your browser to do the downloads (the browser will prompt you to log in for the first download).

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)

What is the resolution of Aster DEM?

The spatial resolution is 15 meters (m) in the horizontal plane. Each scene consists of 4,100 samples by 4,200 lines which corresponds to about 60 kilometers (km) by 60 km ground area.

What is the spatial resolution of ASTER DEM?

How do I download ASTER GDEM data?

What is Aster DEM GIS?

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) 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. The instrument has been collecting data since February 2000.

Which is the latest version of the ASTER GDEM?

Version 3 of the ASTER Global Digital Elevation Model (GDEM) provides new features and sharper imagery. Version 3 of the Advanced Spaceborne Thermal Emission and Reflection Radiometer ( ASTER) Global Digital Elevation Model ( GDEM) is now available from NASA’s Land Processes Distributed Active Archive Center ( LP DAAC ).

How many tiles are there in the ASTER GDEM?

The ASTER GDEM covers land surfaces between 83°N and 83°S and is comprised of 22,702 tiles. Tiles that contain at least 0.01% land area are included. The ASTER GDEM is distributed as Geographic Tagged Image File Format (GeoTIFF) files with geographic coordinates (latitude, longitude).

How big is the aster Global Digital Elevation Model?

The ASTER Global Digital Elevation Model (GDEM) Version 3 (ASTGTM) provides a global digital elevation model (DEM) of land areas on Earth at a spatial resolution of 1 arc second (approximately 30 meter horizontal posting at the equator).

Where can I get the aster water body dataset?

An additional global product is now available: the ASTER Water Body Dataset (ASTWBD). This raster product identifies all water bodies as either ocean, river, or lake. Each GDEM tile has a corresponding Water Body tile. The GDEM and ASTWBD are available for download from NASA Earthdata and Japan Space Systems .