[gdal-dev] Writing Pixel Functions with VRT

[Yves Jacolin (free)]

Thanks Etienne!

Y.
Le mercredi 21 décembre 2011 21:43:32, Etienne Tourigny a écrit :
> Yves,
> 
> processing of netcdf files like this may be much easier using NCO
> (http://nco.sourceforge.net/)
> 
> example:
> ncap -s "WND=sqrt(u^2+v^2)" in.nc out.nc
> 
> 
> Etienne
> 
> On Wed, Dec 21, 2011 at 5:32 PM, Yves Jacolin (free) <yjacolin at free.fr> 
wrote:
> > Le mercredi 21 décembre 2011 21:01:22, Frank Warmerdam a écrit :
> >> On Wed, Dec 21, 2011 at 11:41 AM, Yves Jacolin (free) <yjacolin at free.fr>
> > 
> > wrote:
> >> > Hello,
> >> > 
> >> > I have some question about writing pixel functions with vrt files. I
> >> > have a netcdf file with two subset named U and V.
> >> > 
> >> > How can I process sqrt(U^2 + V^2) using this feature with vrt file?
> >> > 
> >> > * do I need to create a C file and build GDAL with it?
> >> 
> >> Yves,
> >> 
> >> Yes - registered in a particular way.  I must confess to me
> >> this makes custom pixel functions of modest value.
> >> 
> >> > * do I need to create a C file and locate it close to vrt file?
> > 
> > Thanks Franck. This seems indeed a little bit harder to use it but this
> > exists at least!
> > 
> > Is it possible to improve this feature by linking a file dynamicly? I
> > don't know anything about this so it is just for my curiosity.
> > 
> > Thanks,
> > 
> > Y.
> > --
> > Yves Jacolin
> > _______________________________________________
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> > gdal-dev at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/gdal-dev

-- 
Yves Jacolin