黄河流域12.5米分辨率地形因子（剖面曲率）数据集

数据集为黄河流域地形因子（剖面曲率）数据，空间分辨率12.5m，数据源来自于美国国家航空航天局(NASA) 的ASF DAAC；数据通过预处理、分幅、投影、镶嵌地形指标计算四个步骤完成；通过严格的质量检查，为了评估本数据集的可靠性，采用黄河流域ALOS 12.5 m分辨率DEM数据与同期的GDEM 30 m和STRM 90 m分辨率的DEM数据进行对比分析。发现ALOS 12.5 m数据在细节上对地形的表达能力高于GDEM和SRTM数据，能够更好地反映地面的沟谷状况，因此只有更高的高程精度才能对地形有更好的表现力。

This dataset refers to topographic factor (profile curvature) data for the Yellow River Basin, with a spatial resolution of 12.5 m. The data source is ASF DAAC under the National Aeronautics and Space Administration (NASA) of the United States. The data was generated via four core processing steps: preprocessing, tile division, projection transformation, and mosaic-based terrain index calculation. Strict quality inspections were conducted throughout the workflow. To evaluate the reliability of this dataset, a comparative analysis was carried out using the 12.5 m resolution ALOS DEM data of the Yellow River Basin, alongside the contemporaneous 30 m GDEM and 90 m SRTM DEM data. The results show that the 12.5 m ALOS DEM data outperforms GDEM and SRTM data in terrain detail representation, as it can better capture ground gully conditions. This indicates that higher elevation accuracy is a prerequisite for superior terrain expression performance.