This data set is the second version of Aster GDEM data set of Shule River Basin, including DEM, mountain shadow, slope and aspect data. Spatial resolution: 1 radian second (about 30 meters), accuracy: vertical accuracy of 20 meters, horizontal accuracy of 30 meters.
Aster Global Digital Elevation Model (Aster GDEM) is a global digital elevation data product jointly released by NASA and METI, The DEM data is based on the observation results of Terra, a new generation of earth observation satellite of NASA. It is made of 1.3 million stereo image pairs collected by ASTER(Advanced Space borne Thermal Emission and Reflection Radio meter)sensor. Its coverage exceeds 99% of the earth's land surface. The data has a horizontal accuracy of 30 meters (95% confidence) and an elevation accuracy of 20 meters (95% confidence). This data is the third global elevation data, which is significantly higher than the previous SRTM3 DEM and GTOPO30 data. ASTER GDEM has released two versions, the first in June 2009 and the second in October 2011. Compared with the first version, the second version has made further progress in water coverage and deviation removal, and the quality of data has been greatly improved.
Original DEM synthesis
Good data quality
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CSTR:11738.11.ncdc.Westdc.2020.324
10.12072/ncdc.westdc.db3772.2023