[GRASSLIST:5232] Re: netCDF to raster

vidya kotamraju vidyakr at darya.nio.org
Mon Dec 16 18:40:03 EST 2002

Hi paul,
I guess i will be comfortable with the 2nd option.
Could u pls send me the script if it is possible ?
Also, after converting the netCDF file to the raster map form,
I need to be able to modify the point values of the map so as to modify
the variables of the netCDF file that i shall reconvert the raster map to.
Like r.support is used to modify the header information how can i actually
go about modifying the variables of the netCDF by means of its
corresponding raster map ? 

Thanx in advance.
Vidya Kotamraju

--- Paul Hasenohr <phasenohr at cls.fr> wrote:
> Hello Vidya,
> I know two ways to import netCDF files into GRASS.
> 1) You install R and you use R inside GRASS. R is
> able to read netCDF 
> files, so you can export your variable in GRASS. I
> used this method six 
> months ago and it worked fine.
> 2) An other option
> You convert your netCDF file to an ascii file
> readable with the r.in.ascii 
> command.
> I prefer this option because it is less system
> resources consuming.
> I made a shell script to convert netCDF file into
> GRASS raster ascii file 
> but I use netCDF tools developed by my company and
> there are 
> not  publically available. However, if you are
> interested in, I can send it 
> to you and I believe that it is easily portable with
> the nco tools 
> (http://nco.sourceforge.net, have a look at ncks)
> Paul

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