[gdal-dev] issue with gdal.Open() on new USGS GeoPDF

[Reaves, Timothy]

I sent the link off-list for the two files mentioned.

Thanks for looking into it.


On Thu, Aug 15, 2013 at 10:32 AM, Even Rouault <even.rouault at mines-paris.org
> wrote:

> Le jeudi 15 août 2013 16:30:48, Reaves, Timothy a écrit :
> > I'm playing with USGS GeoPDF's.  It seems the newer ones - for some
> reason
> > - have 'unknown' for their GEOGCS value.
> >
> > This is from a file a little over three years old, as output from
> gdalinfo:
> > Driver: PDF/Geospatial PDF
> > Files: OH_Lodi_20100809_TM_geo.pdf
> > Size is 13869, 17680
> > Coordinate System is:
> > PROJCS["UTM Zone 17, Northern Hemisphere",
> >     GEOGCS["NAD83",
> >         DATUM["North_American_Datum_1983",
> > ...
> >
> > This is from a file just a little over a month old, as output from
> > gdalinfo: Driver: PDF/Geospatial PDF
> > Files: PA_Tionesta_20130621_TM_geo.pdf
> > Size is 13652, 17403
> > Coordinate System is:
> > PROJCS["UTM Zone 17, Northern Hemisphere",
> >     GEOGCS["unknown",
> >         DATUM["North_American_Datum_1983",
> > ...
> >
> > When I do most anything with the later PDF, I receive an error:
> > ERROR 1: Couldn't find group for reference to set OFF
> >
> > For most things, the operation continues successfully.  However, I have a
> > Python script I am using that will pull out the NEATLINE for cropping
> > purposes.  It does exist in the metadata, but, the call to gdal.Open()
> > returns None, so my program fails on these newer PDF's.
> >
> >
> > I'm sure there is an issue on the USGS side, but, I wouldn't know where
> to
> > report it.  However, I think there is an issue here with gdal as well;
> gdal
> > correctly converts these files from the command line, so gdal is in fact
> > pulling out the correct information.  This would seem to me then that the
> > call to gdal.Open() should not fail.  It may have 'unknown' as the value
> > for the metadata key GEOGCS, but, the rest of the metadata should be
> > available.
>
> Could you point me to a URL of such a file so I can inspect ?
>
> >
> > Thanks.
>
> --
> Geospatial professional services
> http://even.rouault.free.fr/services.html
>
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