[GRASS-user] Negative raster values from i.landsat.dehaze

[James Travers]

Hi Hamish & Markus,

Thanks for the quick replies.  I did have a look around the documentation for the functionality provided by r.univar, but I think the fact that I couldn't see it in any of the relevant examples put me off track.  

The comment solution makes sense, and I don't think it is a file that needs extensive commenting, but coming from a UNIX background the hash marks screamed comment at me - maybe angle brackets would be a better choice in the documentation:

<--------- start of control file -----> 


I will try again later with them removed anyway.

Cheers,
Jamie


________________________________
 From: Hamish <hamish_b at yahoo.com>
To: James Travers <traversjames at yahoo.ie>; Markus Neteler <neteler at osgeo.org> 
Cc: GRASS user list <grass-user at lists.osgeo.org> 
Sent: Friday, 4 May 2012, 11:51:44
Subject: Re: [GRASS-user] Negative raster values from i.landsat.dehaze
 
James wrote:
> > Ok, I have done a bit more digging and found r.univar
> > for the stats problem - don't know how I missed that one!
MarkusN:
> glad you found it. If you see any potential to improve the
> documentation, please make suggestions.

historical footnote: I wrote r.univar(.c) because I didn't notice that
the earlier r.univar(.sh) existed until I was near done. I guess the
same thinness in the docs still exists. Happy mistake. ;-)

Markus:
> I just tried with the example of the manual page in the
> North Carolina sample dataset and it worked ok. But: don't
> put the comment lines into the control file! I fell into this
> trap in the beginning and i.atcorr
> offered weird error messages.
...
> I suspect that you have the two comment lines in the file
> which unfortunately confuse i.atcorr.

imagery/i.atcorr/GeomCond.cpp's GeomCond::parse():
    cin >> igeom;
    cin.ignore(numeric_limits<int>::max(),'\n');  /* read the rest of the scraps, like comments */
...

can a C++'er recommend ways to silently skip empty lines and lines
beginning with '#'?


thanks,
Hamish
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