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Construction method of adaptable earth system spatial grid

A technology of earth system and space grid, applied in 3D modeling, image data processing, instruments, etc., can solve the problems of inability to meet application requirements, difficulty in general use, adaptability to grid resolution, and clear sphere size and positioning, etc. question

Inactive Publication Date: 2012-07-11
吴立新 +1
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Problems solved by technology

These spherical GSGs are all derived from the field of geophysics, and there are deficiencies in grid non-convergence, geographical consistency, non-overlapping, and consistent division. Application requirements in aerospace, space environment and other fields
Although Spheroid Degenerated OctreeGrid (SDOG) has the advantages of grid non-convergence, geographical consistency, non-overlapping, and consistent division, it still has shortcomings in adapting to grid resolution and definite sphere size and positioning.

Method used

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  • Construction method of adaptable earth system spatial grid
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  • Construction method of adaptable earth system spatial grid

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Embodiment Construction

[0054] If the division order of the degenerate octree is p, and the division order of the radial bisection or spherical degenerate quadtree is f, then record SDOG(f) as the SDOG of the fth division; SDOG-R(p, f) is the diameter SDOG-R with radial profile p+f and spherical profile p; SDOG-S(p, f) is SDOG-S with radial profile p and spherical profile p+f.

[0055] Taking SDOG(3), SDOG-R(3,3), and SDOG-S(3,3) as examples, the subdivision process of each grid is described below:

[0056] 1) Take radius R s = 2 4 R e (R e is the radius of the earth, take the sphere of 6,400km) as the basic sphere, place the center of the basic sphere at the center of the earth, and adopt two great circles overlapping with the equatorial plane of the earth and the meridian plane passing through the Greenwich Observatory, and These two large circular surfaces are orthogonal to each other, and the above-mentioned basic sphere is divided separately to obtain 8 equivalent octants, such as figure 1 ...

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Abstract

The invention discloses a construction method of adaptable earth system spatial grid (ESSG). The construction method comprises the following steps of: 1) selecting, positioning and orientating a basic sphere; 2) dividing a sphere degenerated-octree grid (SDOG); 3) carrying out SDOG radial subdivision (SDOG-R) and SDOG surface subdivision (SDOG-S); 4) encoding the SDOG, the SDOG-R and the SDOG-S; and 5) carrying out uniform space encoding on the SDOG, the SDOG-R and the SDOG-S. The adaptable earth system spatial grid is formed by the SDOG, the SDOG-R, the SDOG-S, and the uniform space encoding. The adaptable earth system spatial grid disclosed by the invention can provide a novel and uniform global space framework for scientific researches of an earth system so as to meet the requirements of spatial modeling of the earth system, data interoperability of the earth system, data organization and search services and the like.

Description

technical field [0001] The invention relates to an earth system space frame and a coordinate system, in particular to a construction method of an earth system space grid system adaptable to grid resolution. Background technique [0002] Research on global change and Earth system science requires a unified Earth system space framework to support multidisciplinary collaboration, multi-domain data modeling and interoperability. The earth system is a complex giant with multi-sphere (core, mantle, crust, ocean, atmosphere, ionosphere, etc.) system. Discrete Global Grid (DGG) only divides the spherical surface into a grid, and can only deal with near-surface problems, but cannot solve underground or above-ground problems, and cannot become a unified spatial framework of the earth system. The Global Spatial Grid (GSG), which is oriented to the overall spatial division of the Earth system, can effectively deal with surface, aboveground, and subsurface issues, and can become a unif...

Claims

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Application Information

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IPC IPC(8): G06T17/05
Inventor 吴立新余接情
Owner 吴立新
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