DESCRIPTION
r.flip flips a raster array from top to bottom. The eastern
edge remains in the east, the western edge remains in the west.
The map's bounds and number of rows & columns remain the same.
NOTES
WARNING: this script as-written is a little lossy in precision.
TODO
It should be easy to rewrite it as a C module which will avoid the
precision loss problem.
SEE ALSO
r.rot90 Addon module for GRASS 6
m.flip and m.rot90 modules for GRASS 5
r.in.ascii
r.out.ascii
r.region
AUTHOR
Hamish Bowman
Dunedin, New Zealand
Last changed: $Date$