[GRASS-user] r.fuzzy.system output definition

[Markus Neteler]

On Wed, Aug 29, 2012 at 1:26 PM, Johannes Radinger
<johannesradinger at gmail.com> wrote:
> Hi GRASS users!
>
> Maybe anyone has already tried the new GRASS GIS fuzzy inference
> system (r.fuzzy.system).
>
> I try to do my first fuzzy computation and follow the paper
> Jasiewicz, J. 2011: A new GRASS GIS fuzzy inference system for massive
> data analysis, Computers & Geosciences, 37: 9, 1525-1531.
>
> Unfortunately I get an error saying it can't find the output raster
> map which is indicated in the .map file:
>
> r.fuzzy.system maps=path/to/my/test_set.map rules=path/to/my/test.rul
> family=Zadeh defuz=bisector imp=minimum res=100 output=output
> ERROR: Raster map <output> not found
>
> my test_set.map file contains beside the other sets also
>
> %output
> $ none {both; 0,20,20,40; linear; 0;1}
> $ low {both; 20,40,40,60; linear; 0;1}
> $ medium {both; 40,60,60,80; linear; 0;1}
> $ high {both; 60,80,80,100; linear; 0;1}
>
> The problem is related to the %output in the .map file not the setting
> for output=output because there is also an error for following case:
> r.fuzzy.system maps=path/to/my/test_set.map rules=path/to/my/test.rul
> family=Zadeh defuz=bisector imp=minimum res=100 output=output_
> map
> ERROR: Raster map <output> not found

I see this code:
grass-addons/grass7/raster/r.fuzzy/r.fuzzy.system/map_parser.c
around line 54

            mapset = (STRING)G_find_raster2(map, "");
            if (mapset == NULL && strcmp(map, "_OUTPUT_"))
                G_fatal_error(_("Raster map <%s> not found"), map);

and wonder what it should do...

Markus