A New Earth System Spatial Grid Extending the Great Circle Arc QTM: The Spherical Geodesic Degenerate Octree Grid
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 si...
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MDPI AG
2025-04-01
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| Series: | ISPRS International Journal of Geo-Information |
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| Online Access: | https://www.mdpi.com/2220-9964/14/4/152 |
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| author | Yilin Ren Mengyun Zhou Aijun Zhong |
| author_facet | Yilin Ren Mengyun Zhou Aijun Zhong |
| author_sort | Yilin Ren |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-dfd747d51fd04619a8d7ed8e63ed0806 |
| institution | OA Journals |
| issn | 2220-9964 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | ISPRS International Journal of Geo-Information |
| spelling | doaj-art-dfd747d51fd04619a8d7ed8e63ed08062025-08-20T02:28:36ZengMDPI AGISPRS International Journal of Geo-Information2220-99642025-04-0114415210.3390/ijgi14040152A New Earth System Spatial Grid Extending the Great Circle Arc QTM: The Spherical Geodesic Degenerate Octree GridYilin Ren0Mengyun Zhou1Aijun Zhong2School of Computer Science, China University of Geosciences, Wuhan 430078, ChinaSchool of Computer Science, China University of Geosciences, Wuhan 430078, ChinaSchool of Computer Science, China University of Geosciences, Wuhan 430078, ChinaAn 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.https://www.mdpi.com/2220-9964/14/4/152Earth system spatial griddiscrete global grid systemquaternary triangular meshglobal 3D grids |
| spellingShingle | Yilin Ren Mengyun Zhou Aijun Zhong A New Earth System Spatial Grid Extending the Great Circle Arc QTM: The Spherical Geodesic Degenerate Octree Grid ISPRS International Journal of Geo-Information Earth system spatial grid discrete global grid system quaternary triangular mesh global 3D grids |
| title | A New Earth System Spatial Grid Extending the Great Circle Arc QTM: The Spherical Geodesic Degenerate Octree Grid |
| title_full | A New Earth System Spatial Grid Extending the Great Circle Arc QTM: The Spherical Geodesic Degenerate Octree Grid |
| title_fullStr | A New Earth System Spatial Grid Extending the Great Circle Arc QTM: The Spherical Geodesic Degenerate Octree Grid |
| title_full_unstemmed | A New Earth System Spatial Grid Extending the Great Circle Arc QTM: The Spherical Geodesic Degenerate Octree Grid |
| title_short | A New Earth System Spatial Grid Extending the Great Circle Arc QTM: The Spherical Geodesic Degenerate Octree Grid |
| title_sort | new earth system spatial grid extending the great circle arc qtm the spherical geodesic degenerate octree grid |
| topic | Earth system spatial grid discrete global grid system quaternary triangular mesh global 3D grids |
| url | https://www.mdpi.com/2220-9964/14/4/152 |
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