Where can I download ASTER GDEM and astwbd tiles?
ASTER GDEM and ASTWBD tiles may be downloaded directly from NASA’s LP DAAC Data Pool. In addition, the data are available with transformation services via the LP DAAC’s Application for Extracting and Exploring Analysis Ready Samples ( AρρEEARS ).
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 does multidirectional hillshade improve terrain visualization?
Multidirectional hillshade improves terrain visualization. It combines light from six different directions to represent an enhanced visualization of the terrain and to improve the appearance of regions with low relief. It improves the balance between the overexposed and shadow areas of the map.
What are the parameters of the hillshade function?
The Hillshade function has the following parameters: Parameter Description Raster The input elevation dataset. Hillshade Type Controls the illumination source for the Azimuth Azimuth is the sun’s relative position a Altitude Altitude is the sun’s angle of elevation
When did ASTER GDEM version 2 come out?
The first ASTER GDEM was released in 2009, with Version 2 being released in 2011. The ASTER GDEM Version 3 maintains the GeoTIFF format and the same gridding and tile structure as in previous versions, with 30-meter spatial resolution and 1°x1° tiles.
Where can I get data from the aster?
In addition, the data are available with transformation services via the LP DAAC’s Application for Extracting and Exploring Analysis Ready Samples ( AρρEEARS ). ASTER is one of five instruments aboard NASA’s Terra spacecraft (launched in 1999) and was built in Japan for the Ministry of Economy, Trade, and Industry (METI).
Where does the ASTER GDEM cover on Earth?
The ASTER GDEM covers land surfaces between 83°N and 83°S, and was produced through automated processing of 2.3 million scenes from the ASTER archive. ASTER GDEM Version 3 shaded relief topography of San Francisco, California, USA. Image: NASA/METI/AIST/Japan Space Systems, and U.S./Japan ASTER Science Team.