[gdal-dev] JP2k, ReadError, Python

[Jay L.]

Even,

I feel quite foolish.  I had not properly registered the plugin PATH.  The
jp2 are processing without a problem as I type.  I will be sure to create a
blog post documenting ALL of the steps that are required to get GDAL up on
running on a windows machine.

Many thanks for your assistance!
Jay

On Sat, Jul 30, 2011 at 10:44 AM, Even Rouault <even.rouault at mines-paris.org
> wrote:

> Le samedi 30 juillet 2011 19:14:17, Jay L. a écrit :
> > Here is the link.  As I said, it is 28MB, including the .jp2, .aux.xml,
> and
> > .prj file.
> >
> > http://www.personal.psu.edu/jzl5325/CTX.zip
> >
> > I would have thought that unloading the JPEG2000 driver would have forced
> > the ECW driver to be used.  It looks to me as if that driver is not being
> > used although it is in the ProgramFiles/GDAL/gdalplugins directory.
> What
> > is the best way to check for proper installation?
>
> Hum, I'm confused : the JP2ECW driver works with gdalinfo, but not with
> python
> ?
>
> Under the Python console, you can try :
> print(gdal.GetDriverByName('JP2ECW'))
>
> If it returns None, then it's clear there's an issue with your setup.
>
> And you should'nt have to unload the JPEG2000 driver because JP2ECW should
> be
> used before, due to the order in which the drivers are registered.
>
> So I suppose that the GDAL_DRIVER_PATH env variable isn't defined or
> doesn't
> point to the gdalplugin directory when you run your python script.
>
> I've tried on my (Linux) box and I can successfully run
> ComputeRasterMinMax(False) with the JP2ECW driver on your file.
>
> >
> > Again, many thanks,
> > Jay
> >
> > > Ah ok, so it is the Jasper JPEG2000 driver that was used. Well it is
> > > known not
> > > to be very robust, so I'm not surprised that it fails decoding your
> > > image.
> > >
> > >
> > > Yes, upload it somewhere and provide the link.
>
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