[gdal-dev] GDAL: How to create one NITF image from CIB CD

[Even Rouault]

Selon "Rydzak, Carol-P28503" <Carol.Rydzak at gdc4s.com>:

> Hi.
> Thank you for getting back to me on this!
> Yes, I am using the 1.6.0 version of GDAL.
>
> I did what you suggested and it gives me a bus error when I run the
> gdalinfo command on the a.toc file.  Do you recall what the problems
> were with the CIB data that you heard about?  I have a 1 meter, 5 meter
> and 10 meter data sets that I tried and I got a bus error on all of
> them.  Any other ideas?

Carol,

There's a high chance that the SIGBUS error you get is a GDAL bug specific to
your CPU. I guess it's a SPARC processor ? If so, there are very sensitive to
"alignment" problems when dereferencing pointers which typically yield to sigbus
errors.

I've looked at frmts/nitf/rpftocfile.cpp a bit and I could see one place (line
138 :  locationSectionPhysicalLocation = *(unsigned int*)tocHeader;) that should
probably be fixed by replacing it with :
memcpy(&locationSectionPhysicalLocation, tocHeader, sizeof(int));

If you've built GDAL yourself, you could try making the above change and retry.
If that still doesn't work, you could rebuild GDAL with debug symbols
(./configure --enable-debug; make clean; make) and run gdalinfo under gdb to see
where the sigbus arrises.

If that still doesn't work and you want to go forward, you could try with a
x86/x86_64 machine where you won't get the sigbus. But I'm interested in getting
rid of those sigbus errors, so you're feedback is welcomed.

The error reported previously with CIB had nothing to do with that. It was a
probably too restrictive consistency check that arrised after dataset opening.
See the following thread :
http://lists.osgeo.org/pipermail/gdal-dev/2009-August/021572.html

Best regards,

Even

>
> Thanks,
>
> Carol
> -----Original Message-----
> From: Even Rouault [mailto:even.rouault at mines-paris.org]
> Sent: Thursday, September 03, 2009 12:50 PM
> To: Rydzak, Carol-P28503
> Cc: gdal-dev at lists.osgeo.org
> Subject: Re: [gdal-dev] GDAL: How to create one NITF image from CIB CD
>
> Selon "Rydzak, Carol-P28503" <Carol.Rydzak at gdc4s.com>:
>
> I assume you are using a recent enough GDAL version (>= 1.5.0) that has
> the RPFTOC driver. If so, gdalinfo on the a.toc should return a list of
> subdatasets (at least one). You can then select one and translate it to
> a GeoTIFF. It will mosaic all the underlying NITF tiles. See
> http://gdal.org/frmt_various.html#RPFTOC for more info.
>
> Someone recently reported problems with CIB but I've not heard any news
> since then. The driver was tested against CADRG datasets but should
> theoritically work with CIB too.
>
> > I am trying to use GDAL utilities (on a Solaris 10 system) against CIB
>
> > files (from a CD) to convert them to a single NITF image.
> >
> > When I run gdal_translate, it doesn't seem to accept the a.toc, but it
>
> > does create a one-to-one nitf image for each CIB file the command is
> > run against.
> >
> > Is there a GDAL command that takes the table of contents file and
> > processes all the CIB frames into one NITF image?  Or takes all the
> > .ntf files that get created and stitches them together into one .ntf
> image?
> >
> >
> > Thank you,
> >
> > Carol Rydzak
> > General Dynamics C4 Systems
> > Phone: (480) 441-7405
> > Email: Carol.Rydzak at gdc4s.com
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