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With the development of remote sensing technologies, computer friendly systems for the display and analysis of global geospatial information become more and more important. This paper concerns a method for computer representation and manipulation of global data based on multi-resolution subdivisions of regular polyhedra. A simple and efficient indexing of the cells of such a subdivision, called A3-coordinates, is introduced. These can be used to encode the 18 · 4 n+1 - 32 cells at the nth level of resolution of the octahedral aperture 4 hexagonal discrete global grid using 2n + 3 bits.
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Ben et al. (2010) studied this question.
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