A SpatRaster represents a rectangular part of the world that is sub-divided into rectangular cells of equal area (in terms of the units of the coordinate reference system). For each cell can have multiple values ("layers").
An object of the SpatRaster class can point to one or more files on disk that hold the cell values, and/or it can hold these values in memory. These objects can be created with the rast method.
The underlying C++ class "Rcpp_SpatRaster" is not intended for end-users. It is for internal use within this package only.