On 14.12.2012 15:09, Nicolas Ribot wrote:
> Hi,
> 
> I tried to load a geotiff image georeferenced with transformation matrix in
> OJ 1.6rc1 and it failed with the message:
> "Neither geotiff tags nor worldfile found.
> This is not a valid geotiff file"
> 
> As far as I understood, GeoTiff georeference information can be stored in 3
> distinct formats (http://www.gdal.org/frmt_gtiff.html):
> tiepoint and pixel size
> transformation matrix
> GCP.
> 
> Looking at the code in OJ trunk, I see that only one method to read the
> georeference information is used, based on the TIFFTAG_GEO_TIEPOINTS TIFF
> tag.
> 
> Slighty changing the code to also include reading the
> TIFFTAG_GEO_TRANS_MATRIX TIFF tag allows the tif file to be opened
> successfully in OJ.
> 
> (I don't know, though, how to deal with GCP georeference, as there can be
> an arbitrary number of GCPs)
> 
> Should I submit a ticket, send a patch ?
> 

i suggest you wait for an answer, especially from jukka, who is quite firm on 
formats. generally i don't see a need for a ticket if you work on the fix 
already.  a patch against trunk will be greatly appreciated.

..ede


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