[GRASSLIST:1407] Re: import AVHRR.

[Markus Neteler]

On Sat, Oct 04, 2003 at 09:50:21PM +0400, Andrey Kiselev wrote:
> On Sat, Oct 04, 2003 at 10:35:22AM -0700, Daniel Victoria wrote:
> > I'm also working with AVHRR images but I'm importing
> > them in a different software because when I first
> > started working with them, GDAL would import but would
> > not do the automatic georreferencing. Does GDAL do
> > that now?
> 
> GDAL can read control points stored in every AVHRR file and you can
> georeference the image using them.
> 

To my experience the polynomial rectification provided by GDAL is not
appropriate to achieve high precision geocoding (same as i.rectify). 
I got shifts of up to 25km, implementation of local splines or similar
will be required (welcome also for i.rectify).

Markus