[postgis-users] PROJ_LIB environment variable

Wisse J.S. (Jeroen) js.wisse at zeeland.nl
Thu Nov 18 05:36:45 PST 2021

Thank you for your help Regina,
Wouldn't your solution just override the environmental variable?

Anyway I just looked into it further and it seems to be a non-issue for us.
I compared the 2 different PROJ_LIB directories and they are exactly the same. All the files in there are exactly the same as well.

So it doesn't matter where the variable points to.

Thanks again for the help,

Van: postgis-users <postgis-users-bounces at lists.osgeo.org> Namens Regina Obe
Verzonden: donderdag 18 november 2021 14:15
Aan: 'PostGIS Users Discussion' <postgis-users at lists.osgeo.org>
Onderwerp: Re: [postgis-users] PROJ_LIB environment variable

One note I think if you set the variables before PostgreSQL is installed as a service it will set it on use.

Take a look at C:\Program Files\PostgreSQL\14\pg_env.bat

I've never tried it before though, but it's my understanding it reads that file during installation. And registration of the service.  So I suspect if you edit that file adding the PROJ_LIB path and then reinstall or manually register the service it should work.

For my testing I have a script that has all these envs in it and then starts up PostgreSQL so I can easily control which version of everything I am using.

Hope that helps,

From: Regina Obe [mailto:lr at pcorp.us]
Sent: Thursday, November 18, 2021 8:06 AM
To: 'PostGIS Users Discussion' <postgis-users at lists.osgeo.org<mailto:postgis-users at lists.osgeo.org>>
Subject: RE: [postgis-users] PROJ_LIB environment variable

From: postgis-users [mailto:postgis-users-bounces at lists.osgeo.org] On Behalf Of Wisse J.S. (Jeroen)
Sent: Wednesday, November 17, 2021 8:45 AM
To: 'postgis-users at lists.osgeo.org' <postgis-users at lists.osgeo.org<mailto:postgis-users at lists.osgeo.org>>
Subject: [postgis-users] PROJ_LIB environment variable


We have a server that has multiple versions of PostgreSQL installed.
Some of these PostgreSQL installations use the PostGIS extension. Unfortunately these PostGIS extensions are all different versions.

When using the windows installer for PostGIS some environment variables are set. Some can have the same value for each PostGIS installation. But there are 2 that refer to a specific directory.
These are:

-       GDAL_DATA: which also can be set in the postgresql.conf file as postgis.gdal_datapath

-       PROJ_LIB

My question is, is it possible to set the PROJ_LIB variable somewhere else then as an environment variable?

Kind regards,

Jeroen Wisse
[Regina Obe]
Not to my knowledge, but I'd be happy to be proven wrong.
That said which versions of proj are you using? It should only be used for Pro > 6

Pre-Proj 6.0 this setting wasn't important and I never used it. PostGIS always looked for all it needed in the contrib/postgis*/proj  folder
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