ABSTRACT

The polyhedral discrete global grid system (DGGS) is a multi-resolution discrete earth reference model supporting the fusion and processing of multi-source geospatial information. The orientation of the polyhedron relative to the earth is one of its key design choices, used when constructing the grid system, as the efficiency of indexing will decrease if local areas of interest extend over multiple faces of the spherical polyhedron. To date, most research has focused on global-scale applications while almost no rigorous mathematical models have been established for determining orientation parameters. In this paper, we propose a method for determining the optimal polyhedral orientation of DGGSs for areas of interest on a regional scale. The proposed method avoids splitting local or regional target areas across multiple polyhedral faces. At the same time, it effectively handles geospatial data at a global scale because of the inherent characteristics of DGGSs. Results show that the orientation determined by this method successfully guarantees that target areas are located at the center of a single polyhedral face. The orientation process determined by this novel method reduces distortions and is more adaptable to different geographical areas, scales, and base polyhedrons than those employed by existing procedures.

多面离散全球网格系统（DGGS）是支持多源地理空间信息融合和处理的多分辨率离散地球参考模型。多面体相对于地球的方向是其主要设计选择之一，用于构建网格系统，因为如果感兴趣的局部区域在球形多面体的多个面上延伸，则分度效率会降低。迄今为止，大多数研究都集中在全球规模的应用上，而几乎没有建立用于确定方向参数的严格数学模型。在本文中，我们提出了一种用于确定区域范围内感兴趣区域的DGGS最佳多面体取向的方法。所提出的方法避免了在多个多面体面之间分割局部或区域目标区域。同时，由于DGGS的固有特性，它可以有效地在全球范围内处理地理空间数据。结果表明，通过这种方法确定的方向可以成功地确保目标区域位于单个多面体面的中心。通过这种新颖的方法确定的定向过程可以减少变形，并且比现有程序所采用的定向过程更适合于不同的地理区域，规模和基础多面体。