当前位置: X-MOL 学术Int. J. Appl. Earth Obs. Geoinf. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Multi-resolution topographic analysis in hexagonal Discrete Global Grid Systems
International Journal of Applied Earth Observation and Geoinformation ( IF 7.5 ) Pub Date : 2022-08-22 , DOI: 10.1016/j.jag.2022.102985
Mingke Li, Heather McGrath, Emmanuel Stefanakis

Discrete Global Grid Systems (DGGS) have been increasingly adopted as a standard framework for multi-source geospatial data. Previous research largely studied the mathematical foundation of discrete global grids, developed open-source libraries, and explored their application as data integration platforms. This study investigated the multi-resolution terrain analysis in a pure hexagonal DGGS environment, including descriptive statistics, topographic parameters, and topographic indices. Experiments across multiple grid resolutions were carried out in three study areas with different terrain roughness in Alberta, Canada. Five algorithms were proposed to calculate both the slope gradient and terrain aspect. A cell-based pair-wise comparison showed a strong positive correlation between the gradient values as calculated from five algorithms. The grid resolutions as well as the terrain roughness had a clear effect on the computed slope gradient and topographic indices. This research aims to enhance the analytical functionality of hexagonal DGGS to better support decision-making in real world problems.



中文翻译:

六边形离散全球网格系统中的多分辨率地形分析

离散全球网格系统 (DGGS) 已越来越多地被用作多源地理空间数据的标准框架。以前的研究主要研究了离散全局网格的数学基础,开发了开源库,并探索了它们作为数据集成平台的应用。本研究调查了纯六边形 DGGS 环境中的多分辨率地形分析,包括描述性统计、地形参数和地形指数。在加拿大艾伯塔省的三个具有不同地形粗糙度的研究区域进行了多个网格分辨率的实验。提出了五种算法来计算坡度和地形坡向。基于细胞的成对比较显示,从五种算法计算得出的梯度值之间存在很强的正相关性。网格分辨率和地形粗糙度对计算的坡度梯度和地形指数有明显的影响。本研究旨在增强六边形 DGGS 的分析功能,以更好地支持现实世界问题的决策。

更新日期:2022-08-23
down
wechat
bug