[GRASSLIST:6861] Re: i.rectify polynomial order

[Hamish]

> > i.rectify 3rd order has problems, see GRASS bug #3166
> >   https://intevation.de/rt/webrt?serial_num=3166
> > 
> > So I recommend using 2nd order.
> 
> What about disabling 3rd order for now?


Well, the rectification works, it's the region setting which is busted
so you have to use the -c flag and figure out your region / resolution
by hand. Maybe disable it in the 6.0.1 branch (or add warning/docs)
but leave as is in 6.1-cvs. If it is commented out I fear it will be
forgotten and not fixed for years.



Hamish