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) <[email protected]> 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) <[email protected]> > > > > 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 > > _______________________________________________ > > gdal-dev mailing list > > [email protected] > > http://lists.osgeo.org/mailman/listinfo/gdal-dev
-- Yves Jacolin _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
