程德强;崔鹏;邹强;靳文;

• 1:中国科学院山地灾害与地表过程重点实验室/中国科学院水利部成都山地灾害与环境研究所
• 2:中国科学院大学

摘要(Abstract)：

针对地理坐标系大区域DEM数据在进行坡度求取时,常规先投影再求取坡度的方法存在着投影类型选择、重采样方法选择、分辨率大小确定及栅格对齐等所带来的操作不确定性问题,该文直接在地理坐标下进行坡度求取以减少不确定性及繁杂操作的有效方法。选取GLOBE DEM数据作为数据源,亚欧大陆作为丝绸之路经济带坡度求取研究区,将Ritter算法及地球表面距离求取公式整合得到地理坐标下坡度求取Ritter改进算法,并提出了比值系数、基准长度等概念,完成了亚欧大陆的坡度求取。地理坐标下的坡度求取方法可为大区域坡度地形因子的求取提供一种新的思路,所求取的亚欧大陆坡度数据将作为开展丝绸之路经济带有关研究的基础数据。

关键词(KeyWords)： 地理坐标;GLOBE DEM;Ritter改进算法;坡度;比值系数;基准长度

Abstract:

Keywords:

基金项目(Foundation): 中国科学院国际合作局对外合作重点项目(131551KYSB20160002);中国科学院前沿科学重点研究项目(QYZDY-SSW-DQC006)

作者(Authors): 程德强;崔鹏;邹强;靳文;

DOI: 10.16251/j.cnki.1009-2307.2020.02.024

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