I see,
so variables are functions in this case.
I've been searching for a while, but I cannot find any tool like grasss
r.mapcalc that is a bit more flexible, eg. that can handle recursive tasks.
Thanks a lot,
Achim
Marco Lechner - FOSSGIS e.V. schrieb:
Hi Achim,
the neighborhood modifier doesn't seem to accept functions (you also
could try rand(), ...)
Marco
Achim Kisseler schrieb:
Hello grass-users,
I have a problem running a r.mapcalc procedure:
given two maps
dir_x,
dir_y
with 0,1,-1 entries
I want to run:
r.mapcalc "the_map=if(isnull(the_map),the_map[dir_x,dir_y],null())"
in order to make a r.water.outlet on many many areas at the same time.
The error I get is:
syntax error, unexpected NAME, expecting INTEGER or '-'
why does dir_x/dir_y does not return an integer here? Using int(dir_x)
also does not work.
Until now I use a r.mapcalc command with many "if", checking the
direction of every pixel every time. But this is quite slow.
Achim
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