[QGIS-Developer] What to do about GDAL and PROJ for 3.10.2?

[Nyall Dawson]

On Thu, 19 Dec 2019 at 16:51, Paolo Cavallini <cavallini at faunalia.it> wrote:
>
> Hi Nyall,
> thanks for clarifying this. Wouldn't it be reasonable to ask gdal+proj
> teams to release a new fixed version ASAP? Even if we fix this in the
> Windows installer, where we (Juergen) have full control, we'll still
> have issues on other OSs where we cannot control dependencies.

We can, but I don't honestly see that happening before Christmas (it
is the holiday season after all!)

Nyall

> Cheers.
>
> Il 19/12/19 03:37, Mathieu Pellerin ha scritto:
> > Having helped out chasing down some of these CRS and transformation
> > issues under GDAL3/PROJ6, I too feel *very* uncomfortable shipping the
> > next QGIS point release with anything lesser than GDAL3 and PROJ6 master
> > as of yesterday.
> >
> > To be clear, QGIS had plenty to fix itself, and that’s been taken care
> > of (thanks to QGIS’s PSC for financing Nyall here). But those fixes are
> > half of the story, and if we are to ship a QGIS version built against
> > GDAL3/PROJ6 that can be trusted to project and transform data properly,
> > we can’t do so unless we ship with the latest revisions of those libraries.
> >
> > On the short term, since the next point release is in 24-ish hours, I’d
> > suggest to update the osgeo4w gdal and proj non-dev libraries to the
> > latest master revisions (with versions like proj6 version 6.3pre or
> > something) and have QGIS 3.10.2 built against those. Jürgen, since you’d
> > carry that library update burden, how do you feel about this solution?
> >
> > Following that, we should discuss with GDAL and PROJ to see if they can
> > package an official release prior to QGIS’ next point release (which is
> > to take place on January 17, 2019 according to our schedule). Once
> > that’s done, we should consider raising QGIS’ minimum version
> > requirement for those libraries.
> >
> > Math
> >
> > On Thu, Dec 19, 2019 at 8:30 AM Nyall Dawson <nyall.dawson at gmail.com
> > <mailto:nyall.dawson at gmail.com>> wrote:
> >
> >     Hi list,
> >
> >     Just want to raise this discussion prior to the 3.10.2 patch release.
> >     The situation as I see it is that there is absolutely critical fixes
> >     in GDAL and PROJ master branches which are not available in any of the
> >     GDAL/PROJ stable releases, all relating to CRS and transformation
> >     handling.
> >
> >     Many of these fixes have been implemented as a direct result of bug
> >     reports filed against QGIS when running under the Proj6/GDAL3
> >     combination.
> >
> >     I personally do not feel comfortable with anyone running QGIS on
> >     GDAL3/Proj6 without these fixes (in fact, I think that we should block
> >     QGIS builds on GDAL/PROJ builds less than master, and greater than
> >     PROJ 5/ GDAL 2 via cmake checks). So we're left in a difficult
> >     position, because the next round of GDAL/PROJ releases aren't
> >     happening anytime soon.
> >
> >     Thoughts welcome on how we should proceed here....
> >
> >     Nyall
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>
> --
> Paolo Cavallini - www.faunalia.eu
> QGIS.ORG Chair:
> http://planet.qgis.org/planet/user/28/tag/qgis%20board/
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