[PROJ] Installing PROJ on a Mac

Wed Nov 25 15:40:12 PST 2020

I did a quick clean install of QGIS 3.16 onto a Mac (I needed to do it
anyway).

If you go to the menu in QGIS ->"QGIS" -> "About QGIS" it will tell the
version of Proj it was compiled against and the version that it is running
against. For QGIS 31.6 on the Mac. - this reported as 6.3.2.

I don't know why the Mac package appears still to be on 6.3.2 - you have to
ask QGIS that. And Proj is built into the QGIS app as a dylib shared object
- so it does NOT include the proj command line executable.

For Future Reference :

The tar files you downloaded are the source code and cannot be installed.

HomeBrew on the Mac - the "brew" command  - is a mac system that downloads
executables and installs them. That command SHOULD have worked. If it did
not - you will need to get support from HomeBrew and not here. However - I
would not use it anymore. If you want to install locally - then the Conda
command at the top of the install page is a much better option and works on
a Mac if you have installed Conda (another package management application).
HOWEVER - none of that will do what you want - since even if you installed
Proj using Conda on your mac and ran the proj command (which should work) -
the version of proj you will be running is NOT the same version as QGIS is
running - since QGIS has its own instance built into the app.

YOU COULD DO THIS:

Install Conda - see
https://docs.conda.io/projects/conda/en/latest/user-guide/install/
Install gdal - see https://gdal.org/download.html#conda

That should get you GDAL 3.2.0 which includes Proj 7.1.1

Then use the gdal_warp command to reproject your data - see
https://gdal.org/programs/gdalwarp.html#gdalwarp

This is what QGIS uses to reproject. - just without the GUI.

On Wed, 25 Nov 2020 at 21:07, Paul Harwood <runette at gmail.com> wrote:

> There is an executable that comes with proj but I am not at all convinced
> that they package that executable into QGIS or that, if they do that it
> would be on the path. They don't need the executable in QGIS - it is using
> {on the mac} the dylib.
>
> On Wed, 25 Nov 2020 at 20:47, Chris Marsh <chris.marsh at usask.ca> wrote:
>
>> Hi,
>>
>> Oh...there is a binary that comes with proj! I've never used it, and did
>> not know about that, my apologies!
>> Hopefully someone on QGIS list or the issue can give you something more
>> actionable as my sense is the problem lies there.
>>
>> Cheers
>> Chris
>>
>> On Wed, Nov 25, 2020 at 2:29 PM Christophe Besuchet <design at golok.net>
>> wrote:
>>
>>> Chris,
>>>
>>> Thank you for your reply.
>>>
>>> I updated to 3.16, but the bug persists… I updated the GitHub issue
>>> tracker, even though it is closed; if no answer, I'll open a new QGIS
>>> ticket. One thing is sure: the user who opened the original ticket has
>>> still issues as well (Windows 10, QGIS 3.16).
>>>
>>> The weird thing is that I can preview raster with the Winkel Tripel
>>> projection, but only part of it; as soon as the preview reaches the end of
>>> longitudes, the raster disappear (screenshots on the GitHub issue tracker).
>>>
>>> As for my attempt at checking if PROJ was installed by typing 'proj', I
>>> had found it here:
>>>
>>> https://github.com/dtutic/GDAL-1.10.1-wintri/blob/master/README.md
>>>
>>> Anyhow, let's hope this bug can be fixed on QGIS side.
>>>
>>> Thanks again for your input.
>>>
>>> Cheers,
>>>
>>> Christophe
>>>
>>> On 25 Nov 2020, at 17:16, Chris Marsh <chris.marsh at usask.ca> wrote:
>>>
>>> Hi,
>>>
>>> I see you note
>>> >QGIS 3.14
>>> but the QGis 3.14 change notes
>>> https://www.qgis.org/en/site/forusers/visualchangelog314/index.html
>>> claim that QGIS 3.14 addresses that problem -- search for  Problem
>>> reprojecting rasters in 54019 and 54042 CRSs #35512
>>> <https://github.com/qgis/QGIS/issues/35512> in the above link
>>>
>>> If resolving #35512 in v 3.14 and 3.16 doesn't solve the problem, I
>>> would open a new QGis ticket.
>>>
>>> On compiling proj:
>>> proj is one of the geospatial libraries used by QGis and is a core
>>> library for handling reprojection. It is something called by other programs
>>> and isn't going to show up on the command line by typing 'proj'.
>>> Further, the QGis will need to be recompiled against this newer version
>>> of proj to work. Installing proj yourself separately on your computer is
>>> almost certainly not going to bring the new features forward for the
>>> currently installed qgis.
>>> Compiling proj isn't going to do what you want unfortunately.
>>>
>>> So, I would confirm this is bug is still a problem on 3.14 (and really
>>> ensure you're trying QGis 3.16) and you aren't accidentally on 3.12.  If
>>> it's still a problem, I would open a new ticket or post on the QGIs mailing
>>> list '
>>> https://qgis.org/en/site/forusers/support.html
>>>
>>> Hope this helps,
>>>
>>> Cheers
>>> Chris
>>>
>>> On Tue, Nov 24, 2020 at 5:21 PM Christophe Besuchet <design at golok.net>
>>> wrote:
>>>
>>>> CAUTION: External to USask. Verify sender and use caution with links
>>>> and attachments. Forward suspicious emails to phishing at usask.ca
>>>>
>>>>
>>>> Hello,
>>>>
>>>> Dumb question from a dumb new user, so please forgive me if this is not
>>>> the right place to ask.
>>>>
>>>> I’m a QGIS user and I'm trying to solve a problem of reprojecting
>>>> rasters in Winkel Tripel projection 54042, in the following environment:
>>>>
>>>> mas OS Mojave 10.14.6
>>>> QGIS 3.14
>>>>
>>>> I understood that this was due "to the lack in PROJ of implementation
>>>> of the inverse projection for Winkel II" and that it was now "added for
>>>> PROJ 7.1".
>>>>
>>>> https://github.com/qgis/QGIS/issues/35512
>>>>
>>>> This is what I attempted:
>>>>
>>>> 1. Used Terminal to check if PROJ was installed on my Mac: got the
>>>> "-bash: proj: command not found"
>>>>
>>>> 2. I downloaded the two following files from the download page of
>>>> proj.org:
>>>>
>>>> • 2020-11-01 proj-7.2.0.tar.gz
>>>> • 2020-11-01 proj-data-1.3.tar.gz
>>>>
>>>> 3. Tried to install with the "brew install proj" command, as instructed
>>>> on the installation page, but to no avail; Terminal returned me the
>>>> following error message: "Error: No such file or directory @ dir_chdir -
>>>> /usr/local/Cellar” and "Operation not permitted @ dir_s_mkdir -
>>>> /usr/local/Cellar".
>>>>
>>>> However, after all this, I found a new "PROJ-master" subdirectory in my
>>>> user directory. In doubt, I checked once again if PROJ was installed on my
>>>> Mac, but Terminal returned me the same "-bash: proj: command not found".
>>>>
>>>> Obviously I must have missed something, and my knowledge of Terminal
>>>> commands is absolute zero… What am I supposed to do now?
>>>>
>>>> In advance thank you zillions for your help!
>>>>
>>>> Cheers,
>>>>
>>>> Christophe Besuchet
>>>> _______________________________________________
>>>> PROJ mailing list
>>>> PROJ at lists.osgeo.org
>>>> https://lists.osgeo.org/mailman/listinfo/proj
>>>>
>>>
>>> _______________________________________________
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>> PROJ at lists.osgeo.org
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>>
>
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