泛第三极（65国）坡度坡长因子（LS）图（2021）

泛第三极（LS）数据集，基于公开的1弧秒分辨率SRTM数字高程数据（Shuttle Radar Topography Mission, SRTM；http://srtm.csi.cgiar.org），经过去接边、去除伪条纹等和滤波除噪等预处理，利用CSLE模型中的坡度坡长因子算法和本项目研发的坡度坡长因子计算工具（LS_Tool），计算得到30弧秒分辨率坡度坡长因子图。泛第三极65国坡度坡长因子数据，是基于CSLE进行土壤侵蚀速率计算的必备数据，同时分析泛第三极265国侵蚀地形特征（如高程、坡度、坡度等宏观分布和微观格局）的基础数据，对于该地区地貌特征、地质灾害特征的分析，也具有参考价值。The Pan-Third Pole (LS) Dataset is constructed using publicly available 1-arcsecond resolution SRTM (Shuttle Radar Topography Mission) digital elevation data (available at http://srtm.csi.cgiar.org). Preprocessing operations including seam removal, spurious stripe elimination, and noise filtering were performed first. Subsequently, 30-arcsecond resolution slope length and steepness factor maps were generated by adopting the slope length and steepness factor algorithm from the CSLE model and the LS_Tool, a dedicated calculation tool developed for this project. The slope length and steepness factor data for the 65 countries within the Pan-Third Pole region is a mandatory dataset for calculating soil erosion rates using the CSLE model. Additionally, it serves as the foundational data for analyzing erosional topographic characteristics (e.g., macro-scale distributions and micro-scale patterns of elevation, slope, etc.) across 265 countries in the Pan-Third Pole region, and offers reference significance for studies on geomorphic features and geohazard characteristics in this region.

搜集汇总

背景与挑战

背景概述

该数据集提供了泛第三极65国的坡度坡长因子图，基于1弧秒分辨率的SRTM数字高程数据计算得到，空间分辨率为30弧秒，适用于土壤侵蚀速率计算和地形特征分析。数据以tiff格式存储，可通过GIS软件如ArcGIS或ENVI进行打开和分析。