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Re: GEOS 3.6

On Wed, Nov 29, 2017 at 12:04 AM Thomas Voß <thomas@airmap.com> wrote:
On Tue, Nov 28, 2017 at 4:00 PM, Sebastiaan Couwenberg
<sebastic@xs4all.nl> wrote:
> On 11/28/2017 09:18 AM, Bas Couwenberg wrote:
>> On 2017-11-28 09:00, Thomas Voß wrote:
>>> we are right now investigating an issue when simplifying geometries
>>> with GDAL, which seems to be caused by
>>> https://trac.osgeo.org/geos/ticket/741 in GEOS. The respective fix
>>> made it to GEOS 3.6.
>>> We are investigating into options for pulling GEOS with the fix
>>> included into our builds. Do you have plans to update GEOS to 3.6 (we
>>> are happy to use unstable or backports)? If not, do you think it's
>>> feasible to cherry-pick the fix into the current package?
>> As reported on this list, updating the geos package to 3.6/3.7 is
>> blocked by OSSIM. [0]
>> The OSSIM 2.2.0 release has support for the newer GEOS, but has other
>> issues that prevent its inclusion in Debian. [1]
>> Development of the OSSIM project is less than ideal, being driven by
>> funding instead of community needs. So it's unclear when the remaining
>> issues will be resolved.
>> If this takes too much time, I'll ask the OTB project to drop their
>> OSSIM dependency so we can remove OSSIM from Debian to unblock the GEOS
>> upgrades.
>> Cherry-picking the fix into the geos package may be possible, but I'll
>> need to investigate this further. Ideally upstream releases GEOS 3.5.2
>> which that fix included.
> The changes for #741 have been merged in the 3.5 branch upstream, and
> included as in patch in geos (3.5.1-4). The updated package will be
> available in unstable in a few hours.

Great, thanks for the swift response. I'll report back testing results
tomorrow my morning.

All green here. Thanks again for the help.

> I don't think the issue is severe enough to warrant a stable-update, so
> the fix is unlikely to find its way into stretch. If you need it there,
> you should either cherry-pick the change from 3.5.1-4 or backport the
> whole package yourself.

Makes sense, we are happy with unstable for now.

Thanks again,


>> [0] https://lists.debian.org/debian-gis/2016/10/msg00036.html
>> [1] https://lists.debian.org/debian-gis/2017/08/msg00008.html
> Kind Regards,
> Bas
> --
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Thomas Voß
Technical Systems Architect


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