[GRASS-user] help with georectify

[Stuart Edwards]

Thank you very much.  That is indeed the fail safe way to go.  For anyone else following this - note that the three steps indicated are run from the xy location not the location where you want the map to end up.

Cheers 

Stu


On Oct 6, 2010, at 2:39 PM, Pablo Carreira wrote:

> Sometimes I have the same problem.
> 
> My solution is to use the georectify module to set the GPCs, save, close it and then run:
> i.group - i.target - i.rectfy.
> It's fail safe.
> 
> Pablo Torres Carreira 
> 
> 
> 
> > From: sedwards2 at cinci.rr.com
> > Date: Wed, 6 Oct 2010 09:23:17 -0400
> > To: grass-user at lists.osgeo.org
> > Subject: [GRASS-user] help with georectify
> > 
> > Hi ~
> > 
> > GRASS 6.4.0 / OS X 10.6.4 and 10.5.8 (PPC) with wxpython
> > 
> > I'm having a problem with the georectify module - which is strange since I've used it a lot in the past without any problems; although maybe not since I upgraded to this GRASS version - hard to remember. The module executes smoothly through the selection of GCPs and will compute an rms error. However, when the georectify button is activated I get an error message stating that the Group does not exist. Right above this message is a line from i.points stating that the points file was saved for this group -- i.e. 
> > 
> > POINTS file </Users/stu/grassdata/xy2/PERMANENT/group/sheet9/POINTS> saved 
> > (Wed Oct 6 09:03:44 2010) 
> > i.rectify -a group=sheet9 extension=georect64214 order=1 
> > ERROR: Group <sheet9> does not exist
> > (Wed Oct 6 09:03:44 2010) Command finished (0 sec) 
> > 
> > This looks a little like a bug that was identified last year and fixed (# 689 / # 709)
> > 
> > BTW, what is the complex 'extension' and why is the auto-generated value so 'complex' 
> > 
> > Thanks for any assistance .......
> > 
> > Stu_______________________________________________
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