金沙江中下游地区1：50万空间分布数据(2015年)

本数据集包含了金沙江中下游地区1：50万空间分布数据(2015年)，为矢量数据。长江流域二级流域矢量区划来源于国家科技基础条件平台-国家地球系统科学数据共享服务平台-西南山地数据资源点。将金沙江中下游地区地图与长江二级流域矢量区划进行空间配准，然后经由ARCGSI矢量化得到金沙江中下游矢量数据，并叠加DEM判断划分是否准确。

This dataset contains 1:500,000-scale vector spatial distribution data of the middle and lower reaches of the Jinsha River (2015). The vector zoning of the secondary basins in the Yangtze River Basin was sourced from the Southwest Mountain Data Resource Node under the National Earth System Science Data Sharing Service Platform of the National Science and Technology Infrastructure Platform. The vector data of the middle and lower reaches of the Jinsha River were developed via the following workflow: first, conducting spatial registration between the map of the target area and the aforementioned secondary basin vector zoning of the Yangtze River; second, performing vectorization using ARCGIS; third, overlaying with DEM data to verify the accuracy of the basin division.