[Qgis-user] Opening Raster from ESRI .GDB

[Michael Treglia]

Even and Alex,

Thanks! That definitely clarifies some things.

I just tried two GDB files with ESRI FileGDB and OpenFileGDB in QGIS. One
.gdb file worked fine with both ESRI FileGDB and OpenFileGDB.  The other
didn't work with either.  I don't know what Arc version the latter was
created in or anything, but I can try and find out and get back to you in
the future.

Best regards,
Mike


On Thu, Jul 24, 2014 at 4:19 PM, Even Rouault <even.rouault at mines-paris.org>
wrote:

> Le jeudi 24 juillet 2014 22:04:00, Alex Mandel a écrit :
> > Sorta, there are 2 drivers for GDB. The open GDB that Even has been
> > working on and the official ESRI GDB api.
> >
> > The ESRI GDB api and Arc instance are not backwards compatible, once you
> > upgrade a gdb to the latest it only works with the latest and there's
> > often no way to write an older variant.
>
> The ESRI FileGDB SDK can only read gdb that have been created by ArcGIS
> 9.X.
> The OpenFileGDB driver can (well, at least on all available samples I have
> worked on). See http://gdal.org/drv_openfilegdb.html for a comparison of
> both
> drivers
>
> >
> > The open GDB driver I think allows you to read any version and write
> > older versions if you need to without auto-upgrading.
>
> Only reading. Writing hasn't been implemented although we probably have
> almost
> everything needed to implement it one day.
>
> >
> > Back to your original question does the ESRI gdb driver work for you use
> > case for now? On windows I think you can get it with OSGeo4w on Linux
> > you need to download the SDK from ESRI and recompile GDAL -
>
> Latest OSGeo4W must have GDAL 1.11, so you won't need recompiling anything.
> Check with "ogrinfo --formats" if OpenFileGDB shows in the list.
>
> > but I don't
> > know if this is vector and raster or just vector.
>
> ESRI FileGDB SDK only supports vector too. So no closed-source or
> open-source
> solutions for raster yet.
>
> >
> > Thanks,
> > Alex
> >
> > On 07/24/2014 12:56 PM, Michael Treglia wrote:
> > > Hi Even,
> > >
> > > Thanks a lot for the quick response - I really appreciate your work in
> > > dealing with the GDB files!
> > >
> > > That sounds great! Let me know if you need more data examples and such.
> > >
> > > Just a quick question - .gdb is not typically forward and backward
> > > compatible across Arc versions, right? [I've definitely had .gdb files
> > > that don't work in QGIS, while some do, so I have assumed that it was
> > > due to versioning issues - is that right? Or should I be doing some
> > > trouble-shooting?]
> > >
> > > Thanks again, and best regards,
> > > Mike
> > >
> > >
> > > On Thu, Jul 24, 2014 at 3:27 PM, Even Rouault
> > > <even.rouault at mines-paris.org>
> > >
> > > wrote:
> > >> Le jeudi 24 juillet 2014 18:19:14, Michael Treglia a écrit :
> > >>> Hi All,
> > >>>
> > >>> I've Googled around, and it seems like this isn't currently possible,
> > >>> but wanted to check with folks on this list for any solution...
> > >>>
> > >>> A lot of data being produced by agencies is now available only as
> ESRI
> > >>
> > >> .gdb
> > >>
> > >>> files. A dataset I'm particularly interested in working with is a
> > >>> gridded soil dataset (
> > >>
> > >>
> http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/ref/?cid=nrcs142p2
> > >> _05
> > >>
> > >>> 3628 )
> > >>>
> > >>> These particular data are in raster format, stored as Arc 10.1 .gdb,
> > >>> available from here: http://datagateway.nrcs.usda.gov/GDGOrder.aspx
> > >>
> > >> Mike,
> > >>
> > >> When I reverse-engineered the vector part of FileGDB format that lead
> to
> > >> the
> > >> OGR OpenFileGDB driver of GDAL 1.11, I came through a few raster GDB
> > >> samples.
> > >> Dealing with them was not in the scope of the work that was funded,
> but
> > >> from
> > >> what I've seen, I've good hope that decoding them would be reachable.
> > >> Would need some extra investigation of course to confirm and
> > >> complementary funding...
> > >>
> > >> Best regards,
> > >>
> > >> Even
> > >>
> > >>> Any suggestions are appreciated.
> > >>>
> > >>> Thanks!
> > >>> Mike
> > >>
> > >> --
> > >> Geospatial professional services
> > >> http://even.rouault.free.fr/services.html
> > >
> > > _______________________________________________
> > > Qgis-user mailing list
> > > Qgis-user at lists.osgeo.org
> > > http://lists.osgeo.org/mailman/listinfo/qgis-user
>
> --
> Geospatial professional services
> http://even.rouault.free.fr/services.html
>
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