                       2-D AND 3-D MANIPULATIONS

GRASS programs can be used to perform two- and three-dimensional data
manipulations on \raster\ data.  These functions are useful for modeling
iterative interactions across a landscape.

         \-  r.basins.fill \             \-  r.drain \
         \-  r.surf.contour \            \-  r.watershed \
         \-  r.surf.idw \                \-  r.surf.idw2 \

For more information on a specific command, select a command and press
ESC.
