[GRASS-user] help with georectify

[Stuart Edwards]

On Oct 13, 2010, at 9:31 AM, Markus Metz wrote:

>> 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)
> 
> It seems that this was not enough, I can reproduce the i.rectify error
> on Linux. This is fixed in the wxGUI Ground Control Manager (6.4.1 and
> above) which includes all features of the wxGUI Georectifier and all
> features of i.points plus some new features to make GCP creation and
> management easier.
>> 
>> BTW, what is the complex 'extension' and why  is the auto-generated value so 'complex'
> 
> extension is the Output raster map(s) suffix [1] and it is so complex
> in order to come up with a unique extension/map name. In the wxGUI
> Ground Control Manager you can change the extension within the
> settings dialog.
> 
> Markus M
> 
> [1] http://grass.osgeo.org/grass64/manuals/html64_user/i.rectify.html

OK - thanks for the explanations.  Should this be filed as a 6.4.0 bug, or is a 6.4.1 release imminent?

Stu