The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Publications Copernicus
Download
Citation
Articles | Volume XL-4/W2
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-4/W2, 95–100, 2013
https://doi.org/10.5194/isprsarchives-XL-4-W2-95-2013
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-4/W2, 95–100, 2013
https://doi.org/10.5194/isprsarchives-XL-4-W2-95-2013

  25 Oct 2013

25 Oct 2013

The extended-Octree Spheroid Subdivision and Coding Model

X. F. Cao, G. Wan, F. Li, and K. Li X. F. Cao et al.
  • Zhengzhou Institute of Surveying and Mapping, 450052 Zhengzhou, Henan, China

Keywords: Extended-Octree model, global spatial grid, spheroid grid, grid subdivision, grid coding, spatial data model

Abstract. Discrete Global Grid has been widely used as the basic data model of digital earth. But it is only confined to the earth surface, and it can not reach to the earth inside or outside. The extended-Octree (e-Octree) spheroid subdivision and coding model proposed here provides a new kind of global 3D grid. This e-Octree model is based on the extension of octree structure, and there are three kinds of extended mechanisms including regular octree, degraded octree and adaptive octree. The process of partition and coding is discussed in details. The prototype system of e-Octree model is implemented, in which e-Octree model has been used to visualize global terrain and space object orbits. These typical applications experiments show that the e-Octree model could not only be used in global change research and earth system science, but also be used for dynamic simulation and spatial index.