This module provides all the functions and routines to extrapolate a field defined onto the grid. It is divided in submodules depending on the destination node:

cell_schemes: extrapolate a field to a cell ;
face_schemes: extrapolate a field to a face ;
edge_schemes: extrapolate a field to an edge ;
point_schemes: extrapolate a field to an arbitrary point ;

This module is useful as the developper does not need a priori knowledge of the grid spacing.