全球地表坡度频率分布数据集

地表坡度频率是地形特征描述的重要指标之一。“全球地表坡度频率分布数据集”是以坡度步长为1度坡度分类，在ASTER GDEM v3.0数字高程模型数据基础上研发得到。该数据集研发过程中，利用ArcGIS的“Slope”工具计算获得浮点型坡度，然后利用“Int”工具获得整型坡度，最后分别计算出1°x1°经纬网格坡度频率数据，在此基础上，统计得到各大洲和全球地表坡度频率分布数据。数据集包括：（1）1°x1°为单元、步长为1度统计的地表坡度栅格数量和频率数据，数据覆盖范围为83°N-83°S，总计22,205条数据记录（.xlsx）；（2）1°x1°经纬网格坡度频率空间分布栅格数据（.shp）；（3）各大洲及全球地表坡度栅格数量和频率统计数据（.xlsx）；（4）基于SRTM计算的全球地表坡度栅格数量和频率数据（.xlsx，2020年9月增补）。数据集由632个数据文件组成，数据量为263 MB（压缩为1个文件，数据量84.6 MB）。

Surface slope frequency is one of the important indicators for topographic feature characterization. The "Global Surface Slope Frequency Distribution Dataset" was developed based on the ASTER GDEM v3.0 digital elevation model (DEM) data, with slope classification using a 1-degree step size. During the development process, floating-point slope values were calculated using the "Slope" tool in ArcGIS, then converted to integer slope values using the "Int" tool. Subsequently, slope frequency data for 1°×1° geographic grids were calculated separately, based on which the slope frequency distribution data for each continent and the entire globe were statistically derived. The dataset includes: (1) Surface slope grid count and frequency data counted with 1°×1° as the unit and a 1-degree step size, covering the range of 83°N to 83°S, with a total of 22,205 data records (.xlsx); (2) Spatial distribution raster data of slope frequency for 1°×1° geographic grids (.shp); (3) Statistical data of surface slope grid count and frequency for each continent and the entire globe (.xlsx); (4) Global surface slope grid count and frequency data calculated based on SRTM (.xlsx, supplemented in September 2020). This dataset consists of 632 data files with a total size of 263 MB (compressed into a single file with a size of 84.6 MB).

搜集汇总

背景与挑战

背景概述

该数据集是基于ASTER GDEM v3.0数字高程模型开发的全球地表坡度频率分布数据，以1度为步长对坡度进行分类，覆盖83°N-83°S范围，提供1°×1°经纬度网格的坡度频率统计和空间分布信息。数据集包括网格统计、各大洲及全球汇总数据，总数据量263 MB，适用于地形特征分析和遥感应用。