[Geotiff] GeoTIFF conformance testing

Even Rouault even.rouault at spatialys.com
Sun Nov 22 10:33:28 PST 2015

Le dimanche 22 novembre 2015 19:18:40, Smith, Richard C. a écrit :
> Hello GeoTIFF list members:
> In GeoTIFF FAQ by Mike Ruth found at
> http://www.remotesensing.org/geotiff/faq.html there is the comment "...the
> quality of GeoTIFF implementations varies greatly, there are no means to
> do conformance testing on produced GeoTIFF files."
> My question is, has any progress been made in doing conformance testing on
> GeoTIFF files? And, are there any easy to use tools for GeoTIFF
> conformance testing?


That's a good question. I'm not aware of any free&open source conformance 
testing software for GeoTIFF.

I could imagine at least 2 levels :
- checking that the geotiff keys and tags are properly encoded ("easy" level)
- checking that the projection info are properly encoding, ie checking that 
for a given projection method, the appropriate parameters are there (from my 
memory, this is not even specified in geotiff itself). This is often the level 
where interoperability problems occur.

There's (was?) some effort at OGC to revive the GeoTIFF spec: 
http://www.opengeospatial.org/projects/groups/geotiffswg . Perhaps some 
validation tools was in the scope... ?


> Thanks in advance for your reply,
> Rick Smith
> Phone: 703.822.9398
> E-mail: smithrc at leidos.com<mailto:smithrc at leidos.com>

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