TY  - Data
T1  - 8 m Fused Digital Elevation Model Dataset for the Qilian Mountains
A1  - Zhang Yanli
A1  - Rao Ke
PY  - 2026
DA  - 2026-09-07
PB  - National Cryosphere Desert Data Center
AB  - High-resolution digital elevation models (DEMs) are essential foundational data for terrain analysis, hydrological modeling, geological hazard assessment, and related studies. However, due to cloud cover, terrain shadows, and stereo image matching conditions, the HMA 8-m DEM contains data voids and localized elevation anomalies in the Qilian Mountains. In this study, the HMA 8-m DEM, SRTM DEM, and ICESat-2 ATL08 elevation measurements were used. Based on an ICESat-2 elevation residual prior-guided DEM super-resolution reconstruction method (PAG-SR), the SRTM DEM was reconstructed at a spatial resolution of 8 m and used to fill data voids and replace localized anomalous areas in the HMA 8-m DEM, thereby generating an 8-m fused DEM for the Qilian Mountains. A total of 200,000 ATL08 elevation measurements that were not used for model training were used for validation. The results showed that the root mean square error (RMSE), mean absolute error (MAE), and mean bias error (MBE) of the fused DEM were 3.9657 m, 3.1216 m, and 2.4351 m, respectively. This dataset can provide fundamental elevation data support for geomorphological analysis, hydrological modeling, glacier change, and ecological and environmental research in the Qilian Mountains.The HMA 8-m DEM was generated from high-resolution commercial stereo satellite imagery acquired by GeoEye-1, QuickBird-2, and WorldView-1/2/3, among others, and was downloaded from the National Snow and Ice Data Center website (https://nsidc.org/). The HMA 8-m DEM used in this dataset has a spatial resolution of 8 m, and its source imagery was acquired between January 2002 and November 2016. The product provides a good representation of terrain details; however, some areas contain data voids and localized elevation anomalies due to cloud cover, terrain shadows, and limitations in stereo image matching. The SRTM DEM was derived from the Shuttle Radar Topography Mission (SRTM), jointly implemented by the National Aeronautics and Space A
DB  - NCDC
UR  - http://www.ncdc.ac.cn/portal/metadata/00bf513f-41fa-4003-9ea8-1c6734fd56e3
ER  -