[PROJ] Conda for PROJ

[Mike Taves]

Hi Javier,

Client applications like qgis and pyproj need to be re-built (because
of statically compiled components?), which happens usually via a
migration bot (https://conda-forge.org/status). The round of "proj95"
updates have not started yet, but hopefully later today (I think it's
automated). Eventually, the migration bot will create several PRs like
this one: https://github.com/conda-forge/qgis-feedstock/pull/455 which
will rebuild qgis with a version of proj.

My observation of the fastest time from source release to compiled
distribution is usually with OSGeo4W, as I noted already. E.g. I was
exploring Airocean projections (introduced with PROJ 9.6) in QGIS
yesterday.

Cheers, Mike

On Tue, 18 Mar 2025 at 08:31, Javier Jimenez Shaw <j1 at jimenezshaw.com> wrote:
>
> Hi
>
> PROJ 9.6.0 is since today in conda-forge. Thanks Mike and Mike.
>
> However, trying to install it with QGIS, it gives me this error:
>
> conda install -c conda-forge proj=9.6.0
> ...
> ├─ proj 9.6.0**  is requested and can be installed;
> └─ qgis is not installable because there are no viable options
>    ├─ qgis [3.40.1|3.40.2|3.40.3|3.42.0] would require
>    │  └─ proj >=9.5.1,<9.6.0a0 , which conflicts with any installable versions previously reported;
>
> I guess that I have to wait until QGIS is compiling with PROJ 9.6.0, right? Is there any hacky workaround? (apart from compiling QGIS myself)
>
> Cheers,
> Javier.
>
> On Sun, 16 Mar 2025 at 23:31, Mike Taves <mwtoews at gmail.com> wrote:
>>
>> Two quick follow ups on my previous message...
>>
>> On Mon, 17 Mar 2025 at 09:46, Mike Taves <mwtoews at gmail.com> wrote:
>> >
>> > Conda-forge doesn't really go through the release candidate stage
>> > testing rounds (or I haven't seen it).
>>
>> I've since found the process for testing release candidates, so I'll
>> opt in proj for that process (eventually):
>> https://github.com/conda-forge/proj.4-feedstock/issues/154
>>
>> > As for OSGeo4W, I've created https://trac.osgeo.org/osgeo4w/ticket/875
>> > to task these updates.
>>
>> Jürgen Fischer is quick to respond. Updates for proj and proj-data are
>> already available for OSGeo4W.
>>
>> Updates for conda-forge should probably make it in later today.