[GRASS-user] Some question about r.in.xyz and r.surf.idw

GRASS GRASS user
1

Hi all,

Im working with xyz data, the range of my data is: min = 0.046000 max = 1.358000

And I’m trying interpolate with r.surf.idw, but the answer is “Range of data: min = 1 max = 1”

I’m working with these steps:

r.in.xyz input=“biomarcadores.txt” output=“r_bio” method=“mean” type=“FCELL” fs=“|” x=2 y=1 z=4 zscale=1.0 percent=100

r.surf.idw input=r_bio output=r_sup_bio

The problem is when I try work with decimal numbers.

some advice about how I’ll work with decimal numbers in this process?

Thanks for your help!!

John
Grupo Bioestratigrafia - ICP
Bogotá - Colombia

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2

Hi John,

I had the same problem. As Hamish told me some weeks ago,

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

I solved my problem multiplying the input raster by 100 (r_bio in your case), then I interpolated with r.surf.idw and finally divided once again by 100.

Hope this may help you

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.pettazzi@meteogalicia.es <mailto:alberto.pettazzi@meteogalicia.es>

Jhon Ortiz escribió:

Hi all,

Im working with xyz data, the range of my data is: min = 0.046000 max = 1.358000

And I'm trying interpolate with r.surf.idw, but the answer is "Range of data: min = 1 max = 1"

I'm working with these steps:

r.in.xyz input="biomarcadores.txt" output="r_bio" method="mean" type="FCELL" fs="|" x=2 y=1 z=4 zscale=1.0 percent=100

r.surf.idw input=r_bio output=r_sup_bio

The problem is when I try work with decimal numbers.

some advice about how I'll work with decimal numbers in this process?

Thanks for your help!!

John
Grupo Bioestratigrafia - ICP
Bogotá - Colombia

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