Using ZY-3 images, HMADEM, NASADEM and other data sources, a 30 m spatial resolution ice volume change data product was generated in the Karakoram Mountains from 2000 to 2021 based on geodetic methods, and the data was verified and evaluated. This data can provide basic data support for glacier research in High Asia.
ZY-3 data resolution 4m project acquisition.
ARCTIC DEM resolution 2m address: https://www.pgc.umn.edu/data/arcticdem/.
NASA DEM resolution 30m address: https://www.earthdata.nasa.gov/topics/land-surface/digital-elevation-terrain-model-dem.
HMA DEM resolution 8m address: https://nsidc.org/data/hma_dem8m_mos/versions/1
1. Produce ZY-3 DEM with a resolution of 4m through PCI Geomatica.
2. Use geodetic method to align the three-phase DEM to obtain the distribution of glacier elevation changes in the three phases, and use RGI V6 dataset to crop to obtain the elevation changes in the glacier area.
The uncertainty in the DEM was assessed using a validated workflow proposed by Hugonnet et al(2021). The results showed that the uncertainty in different areas of the Karakoram region was below 1.13 m, the result quality was good, and the data was credible.
| # | number | name | type |
| 1 | 2021YFE0116800 | National key R & D plan | |
| 2 | KC-23235411 | other |
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CSTR:11738.11.NCDC.GLACIER.DB6724.2025
10.12072/ncdc.glacier.db6724.2025