... which is to say, me.
I managed to get through the first part of the GRASS Seeds Optimal
Routing exercise, up to step 7, by r.patch-ing zeros into the asp_south
and asp_north maps, covering up the "no data" cells which had caused
r.mapcalc problems. Looks like r.mapcalc might need a flag to indicate
it should treat "no data" as zeros, or not.
In doing
r.cost input=cost coord=445775,310875 output=cost_dist
the output file is present, yet full of "no data." This happens with and
without the -k options, and under command line and interactive modes. As
the input map and the coord (BTW it failed when I used "coordinate" as
well) are not "no data" this is confusing.
RSVP if you have any clues. I'm fresh out. :^)
Adios,
Chris
--
C.S. Cornuelle
School of Mathematics/MCIM
206 Church St. SE
University of Minnesota
Minneapolis, MN 55455
(612) 626-8930, 624-9069
bob@math.umn.edu
--
Ferventer Vestite