Work

A New Earth System Spatial Grid Extending the Great Circle Arc QTM: The Spherical Geodesic Degenerate Octree Grid

Year: 2025

Type: article

Abstract: An Earth system spatial grid (ESSG) is an extension of a discrete global grid system (DGGS) in the radial direction. It is an important tool for organizing, representing, simulating, analyzing, sharing, and visualizing spatial data. The existing ESSGs suffer from complex spatial relationships and significant geometric distortion. To mitigate these problems, a spherical geodesic degenerate octree grid (SGDOG) and its encoding and decoding schemes are proposed in this paper. The SGDOG extends the great circle arc QTM in the radial direction and adopts different levels of the great circle arc QTM at different radial depths. The subdivision of SGDOG is simple and clear, and has multi-level characteristics. The experimental results demonstrate that the SGDOG has advantages of simple spatial relationships, convergent volume distortion, and real-time encoding and decoding. The SGDOG has the potential to organize and manage global spatial data and perform large-scale visual analysis of the Earth system.

Source: ISPRS International Journal of Geo-Information

DOI: 10.3390/ijgi14040152

Authors: Yilin Ren, Mengyun Zhou, Aijun Zhong

Institution: China University of Geosciences

Language: English

Topic: Historical Geography and Cartography

Subfield: Geography, Planning and Development

Field: Social Sciences

Domain: Social Sciences

Open Access status: gold

Estimated APC paid: $2,292

Funder: National Natural Science Foundation of China