A Coordinate is a one-dimensional Index. It maps integer indices to meaningful values along a dimension. Two representations:
Details
ImplicitCoord: regular grids defined by offset + step. Coordinates are never stored, computed on demand via
offset + (0:(n-1)) * step. This is the raster/terra cell abstraction, and xarray's RangeIndex.ExplicitCoord: an arbitrary vector of coordinate values (numeric, character, POSIXct, or anything with sensible comparison operators).