![]() In this context, it is common also to use a specific DGG as foundation for geocoding standardization. The most usual grids are for horizontal position representation, using a standard datum, like WGS84. DGGs have been proposed for use in a wide range of geospatial applications, including vector and raster location representation, data fusion, and spatial databases. ![]() Each cell is related with data objects or values, or (in the hierarchical case) may be associated with other cells. When each cell of a grid is subject to a recursive partition, resulting in a "series of discrete global grids with progressively finer resolution", forming a hierarchical grid, it is called a hierarchical DGG (sometimes "global hierarchical tessellation" ĭiscrete global grids are used as the geometric basis for the building of geospatial data structures. Each region or region-point in the grid is called a cell. In a usual grid-modeling strategy, to simplify position calculations, each region is represented by a point, abstracting the grid as a set of region-points. Mathematically it is a space partitioning: it consists of a set of non-empty regions that form a partition of the Earth's surface. A discrete global grid ( DGG) is a mosaic that covers the entire Earth's surface.
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