[gdal-dev] Writing Pixel Functions with VRT

[Yves Jacolin (free)]

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