[GRASS-user] Calculating Azimuth of Stream Main Channel

[Rich Shepard]

   I need the compass direction (azimuth) of the main channels in identified
sub-basins delineated by r.basin. I've looked at the list of vector and
raster modules (both regular and add-on) without seeing one that will
provide this output.

   Is there a module that can take a basin's mainchannel map and identify the
compass direction in which it flows?

TIA,

Rich