[GRASSLIST:5244] Re: Assigning NULL values to raster maps when importing data

[Sandro Klippel]

try:

r.null importedraster setnull=-999

Em Seg 03 Jan 2005 15:46, Jaime Carrera escreveu:
> Dear all,
>
> I wrote a program to import ASCII files which
> automatically assigns a rainbow color table to each
> raster map. I'm importing floating point raster maps
> but the ASCII files also have a value of -999 for
> cells that are not used for the simulation (the
> program I wrote imports MODFLOW's output for heads and
> drawdowns). When Ithe program assigns the rainbow
> color table it uses the MIN and MAX values of the
> raster map, and whenever there are inactive cells a
> valu of -999 will be present.
> I wanted to ask for some guidance in order to
> reclassify the -999 value to a NULL value when the
> maps are imported so the MIN value used to assign the
> color table is the actual min value from the
> simulation.
>
> Thanks a lot and all the best for the new year,
>
> Jaime
>
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