ASTER GDEM data is jointly developed by METI of Japan and NASA of the United States and distributed to the public free of charge. ASTER GDEM data products are calculated and generated based on the data of "Advanced Spaceborne Thermal Emission and Anti radiometer (ASTER)", which is the only high-resolution elevation image data covering the global land surface at present. The product has a spatial resolution of 30m. At present, there are three versions of ASTER GDEM V1, ASTER GDEM V2 and ASTER GDEM V3. On August 5, 2019, NASA and METI jointly released the ASTER GDEM V3 version. On the basis of V2, 360000 optical stereo image pair data were added, mainly used to reduce the blank area of elevation value and the numerical anomaly of water area.
The dataset is stored in GeoTiff format, and the file is named ASTGTMV003_ NNEE.tif, where V003 represents version 3, NN represents latitude, and EE represents longitude.
The data can be directly read by gis software such as arcgis, or by programming languages such as matlab and python.
NASA. (2022). 30m ASTER GDEM V3 elevation data in Southwest China. Upper Yangtze River Scientific Data Center, DOI: https://doi.org/10.5067/ASTER/ASTGTM.003. (Download the reference：
Using this data, the data citation is required to be referenced and the related literatures are suggested to be cited.
To respect the intellectual property rights, protect the rights of data authors, expand services of the data center, and evaluate the application potential of data, data users should clearly indicate the source of the data and the author of the data in the research results generated by using the data (including published papers, articles, data products, and unpublished research reports, data products and other results). For re-posting (second or multiple releases) data, the author must also indicate the source of the original data.
License：
This work is licensed under an
Attribution 4.0 International (CC BY 4.0)
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| East: 112.50 | West: 97.00 |
|---|---|
| South: 20.50 | North: 34.50 |
