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What is Aster Global DEM?
Description. 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 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.
How do you get Aster DEM data?
- ASTER Global Digital Elevation Map Announcement.
- 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.
What is ASTER in remote sensing?
The ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) sensor is an imaging instrument flown on the Terra satellite which was launched in December 1999. An ASTER scene covers an area of approximately 60 km by 60 km and data is acquired simultaneously at three resolutions.
What is CartoSat DEM?
Cartosat-I or IRS P5 (Indian Remote Sensing Satellite) is a remote sensing satellite meant for cartographic applications like generation of Digital Elevation Model (DEM) and was launched by Inadian Space research organization (ISRO).
How can we download Dem?
SRTM DEM data is being housed on the USGS Earth Explorer. To download, select your area of interest. Under the data sets tab, select Digital Elevation > SRTM > SRTM 1-ArcSecond Global . But here’s a USGS Earth Explorer download guide to help you get started.
How is the aster global DEM CKAN data distributed?
The ASTER GDEM is distributed as Geographic Tagged Image File Format (GeoTIFF) files with geographic coordinates (latitude, longitude). The data are posted on a 1 arc-second (approximately 30–m at the equator) grid and referenced to the 1984 World Geodetic System (WGS84)/ 1996 Earth Gravitational Model (EGM96) geoid.
How many tiles are in the aster global DEM?
Selected data are averaged to create final pixel values, and residual anomalies are corrected before partitioning the data into 1 degree (°) x 1° tiles. The ASTER GDEM covers land surfaces between 83°N and 83°S and is comprised of 22,702 tiles.
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 ).
Where can I download aster global elevation map?
Each GDEM tile has a corresponding Water Body tile. 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.