[GRASS5] Re: [bug #3023] (grass) r.fillnulls doesn't work

[William K]

Hm, I've been half-paying attention to this, but I have a possible 
solution to this.  A while back I modified the r.fillnulls because I 
wanted more than 1 cell buffer and to add a couple options to control 
the v.surf.rst.  I had trouble with the way it was done then (can't 
remember the details) and switched to using r.grow.  It becomes simpler 
since you don't need to think about how big a cell is, or in this case 
how the decimal is represented, and it only needs 1 temp raster.  That 
whole block to generate the MASK condenses down to 2 lines:

r.mapcalc $TMP1="if(isnull($GIS_OPT_input),1,null())"
r.grow input=$TMP1 output=MASK rad=1


hope this helps.


On Mar 1, 2005, at 8:24 PM, Hamish wrote:

>>>> r.fillnulls fails in such a way:
>>>>
>>>> GRASS 6.0.cvs:~ > r.fillnulls input=N51E016_nowy
>>>> output=N51E016_nowy.fld Using tmp file r_fillnulls_4707
>>>> Locating and isolating NULL areas...
>>>>  100%
>>>> r.buffer: 00000000 - illegal distance specification
>>>
> ..
>>> what do you get if you type this at a command prompt:
>>>
>>> echo "0.3 0.3" | awk '{printf "%.8f\n", ($1 + $2)}'
>>> 00000000 or 0.60000000 ?
>>
>> Neither:
>>
>> GRASS 6.0.cvs:~ > echo "0.3 0.3" | awk '{printf "%.8f\n", ($1 + $2)}'
>> 0,00000000
>>
>> "," instead of "." - would that be the issue? I Poland, in opposite to
>> the  normal world, we use the coma as the decimal point deliminator.
>> Does  r.fillnulls rely on local system settings?
>
>
> Yes, that's the problem.
>
> I think awk might have troubles too. does this give "0,6":
> echo "0,3 0,3" | awk '{printf "%.8f\n", ($1 + $2)}'
> ?
>
>
> We can't assume "bc" or "dc" are installed, but come to think of it we
> are using an arbitrary buffer distance here anyway so it doesn't really
> matter if we are +/- 1m. I've just applied a fix in CVS removing the
> above "awk" step. please test.
>
>
>
> Hamish
>
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-----
William Kyngesburye <kyngchaos at charter.net>
http://webpages.charter.net/kyngchaos/

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