[GRASSLIST:4821] Re: r.mapcalc magic

[Tom Z. Meinlschmidt]

Hi Rado,

GRASS:~ > r.mapcalc sitmap1 = "9999 + if(isnull(sitmap),0,sitmap)"

it works for me :)

tom


On Thu, Oct 24, 2002 at 05:53:08PM -0400 Rado Bonk [rbonk at host.sk] wrote:
> Hi,
> 
> My raster map consists of individual discrete pixels and NULL values
> around them (map is the results of s.to.rast command). Since I need to
> reproject the map (using i.rectify) I have to change all the NULL
> values into to "9999" (or other arbitrary value, zero is also 
> acceptable). It's because the i.rectify somewhat doesn't produce results 
> using NULL maps as input.
> 
> I tried to do that with r.mapcalc, with the following result:
> 
> GRASS:~ > r.mapcalc sitmap1 = 9999 + if(isnull(sitmap),0,sitmap)
> bash: syntax error near unexpected token `if(i'
> 
> Where is the problem?
> 
> Other thing, I expected r.support to replace the NULL
> values with "zero" when choosing the appropriate option, but it doesn't
> work.
> 
> Thanks,
> 
> Rado
> 
> 
> -- 
> Radoslav Bonk M.S.
> Dept. of Physical Geography and Geoecology
> Faculty of Sciences, Comenius University
> Mlynska Dolina 842 15, Bratislava, SLOVAKIA
> tel: +421 2 602 96 250 e-mail: rbonk at host.sk

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