黄河流域12.5米分辨率地形因子（坡度变率）数据集

数据集为黄河流域地形因子（坡度变率）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，数据完整性、逻辑一致性、位置精度、属性精度、接边精度、现势性均符合国家测绘局制定的有关技术规定和标准的要求，质量优良可靠。

This dataset is the terrain factor (slope gradient) data of the Yellow River Basin, with a spatial resolution of 12.5 meters. Its data source is the ASF DAAC under the National Aeronautics and Space Administration (NASA) of the United States. The dataset was produced via four core processing steps: preprocessing, tiling, projection transformation, and the calculation of terrain indices with mosaicking. After undergoing strict quality inspections, the data's completeness, logical consistency, positional accuracy, attribute accuracy, edge-matching accuracy and currency all comply with the relevant technical regulations and standards formulated by the National Bureau of Surveying and Mapping of China, with excellent and reliable quality.