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GLOBAL 3D-GRIDS BASED ON GREAT CIRCLE ARC QTM SPHERE OCTREE AND ITS APPLICATION
Discrete Global Grids (DGGs) Earth System Spatial Grid（ESSG） Quaternary Triangula Mesh (QTM) Global GIS Spatial Data Mode Digital Earth
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2014/4/21
With the development of computers, network communications, scientific computing, mapping remote sensing and geographic
information technologies, Discrete Global Grids (DGGs) and Earth System Spatial...
THE EXTENDED-OCTREE SPHEROID SUBDIVISION AND CODING MODEL
extended-Octree model global spatial grid, spheroid grid, grid subdivision grid coding spatial data model
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2014/4/21
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-Oc...