[Qgis-user] Opening Raster from ESRI .GDB

[Even Rouault]

Le jeudi 24 juillet 2014 22:31:44, David Fawcett a écrit :
> Even,
> 
> I believe that you meant that the ESRI FileGDB driver can only read files
> created by ArcGIS 10.0 or higher.  Their driver does not work for 9.x files
> if I remember correctly.

Oops you're right. I wrote the contrary of what I meant. Thanks for rectifying

> 
> David.
> 
> 
> On Thu, Jul 24, 2014 at 3:19 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
> > > > 
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> > 
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