[GRASS-user] problem with r.surf.idw

2009-02-23 Thread Alberto Pettazzi 

Dear all,

I want to interpolate a raster map that contains real values. I KNOW the 
values are real because I output the raster values with r.out.ascii 
command and the file shows real values.
The problem is when I interpolate the raster with the r.surf.idw 
function and output the interpolated raster value, the file only 
contains integer (probably truncated) values.

the command I type is :
r.surf.idw input=original_raster output=intepolated_raster --o
Obviously, typing a d.what.rast on the intepolated raster, I only see 
integer values (as in the ascii file generated).

So, why interpolating produces only integer values??
thank you in advance,
--

Alberto Pettazzi


MeteoGalicia - Departamento de Climatología y Observación

Consellería de Medio Ambiente e Desenvolvemento Sostible

Rúa de Roma, 6

15707 Santiago de Compostela. A Coruña


Teléfono: +34-881-999646


e-mail: alberto.petta...@meteogalicia.es 
mailto:alberto.petta...@meteogalicia.es



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Re: [GRASS-user] problem with r.surf.idw

2009-02-23 Thread Hamish 

Alberto Pettazzi wrote:
 I want to interpolate a raster map that contains real
 values. I KNOW the values are real because I output the
 raster values with r.out.ascii command and the file shows
 real values.
 The problem is when I interpolate the raster with the
 r.surf.idw function and output the interpolated raster
 value, the file only contains integer (probably truncated)
 values.

r.surf.idw and r.surf.idw2 only produce CELL (integer) maps.

try using (r.to.vect +) v.surf.idw or v.surf.rst instead.


Hamish



  

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