[Gdal-dev] Anything changed on reading Geo-Information from G eoTiff?

[Winkler, Roland]

I just tested my .tfw with an arbitrary tif image and
I still have the described problems. I don't believe that I have 
something in my environment, because three people experienced the
problem on there machines before I got aware of this.
I'm working with MS Visual C++ 6.0 on XP and but this
shouldn't be a problem. Maybe it's the build. I took a 
csv snapshot some time ago.

I will debug into gdal/gcore/gdal_misc.cpp tomorrow  
and have a closer look. 

regards
Roland

> -----Original Message-----
> From: Frank Warmerdam [mailto:warmerdam at pobox.com] 
> Sent: Dienstag, 18. November 2003 17:39
> To: gdal-dev at remotesensing.org
> Subject: Re: [Gdal-dev] Anything changed on reading 
> Geo-Information from G eoTiff?
> 
> 
> Winkler, Roland wrote:
> > I attched the output of gdalinfo and also the .tfw file of 
> the tiff. 
> > Unfortunately I don't know the "listgeo"-tool.
> > 
> > I could also provide the image, but it's 75MB after 
> compressing still 
> > 20MB, pretty to much for putting it into bugzilla. After creating a 
> > subset with erdas or even with the older gdal version this 
> problem is 
> > vanished.
> > 
> > If you are still interested in the image I could put it on our 
> > ftp-server or burn it on a CD and send this CD via mail.
> 
> Roland,
> 
> That's pretty funky.  The x offset sign in your gdalinfo 
> output does indeed seem to be wrong for no apparent reason.  
> I created a simple little tiff file and tried it with your 
> .tfw file and gdalinfo and I got correct (negative x offset) 
> output, so the problem would appear to be related to either 
> your specific version of GDAL (that is CVS "head" seems 
> fine), or something in your environment (I tested on Linux 
> with the default "C" lang environment).
> 
> If you are able to debug into your build of GDAL try stepping into
> GDALReadWorldFile() (in gdal/gcore/gdal_misc.cpp) and see 
> what is going wrong. It is as if the atof() there is going 
> wrong, or perhaps for some reason the
> CSLLoad() is cutting off a character in the x offset line.
> 
> Best regards,
> 
> -- 
> ---------------------------------------+----------------------
> ----------
> ---------------------------------------+------
> I set the clouds in motion - turn up   | Frank Warmerdam, 
> warmerdam at pobox.com
> light and sound - activate the windows | http://pobox.com/~warmerdam
> and watch the world go round - Rush    | Geospatial 
> Programmer for Rent
> 
> 
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