[PROJ] Installing PROJ on a Mac

Wed Nov 25 15:58:25 PST 2020

Paul,

Thank you so much for all these info.

Indeed, on my QGIS version it also indicates "Rel. 6.3.2, May 1st, 2020"… I'll definitely mention this in my ticket.

As for HomeBrew and Conda — and all the precious references you provided — I'll keep this as a future reference, in particular if none of that will do what I want. My skills are principally in design, and even though I've got some knowledge of development, it requires a part of my brain that's not always available and currently I cannot afford the learning curve. I'll then pray that QGIS can fix this out.

But thank you zillions for the time spent on this issue. I really appreciate!

Cheers,

Christophe

> On 26 Nov 2020, at 00:40, Paul Harwood <runette at gmail.com> wrote:
> 
> 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/ <https://docs.conda.io/projects/conda/en/latest/user-guide/install/>
> Install gdal - see https://gdal.org/download.html#conda <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 <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 <mailto: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 <mailto: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 <mailto: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 <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 <mailto: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 <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 <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 <mailto: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 <mailto: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 <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 <http://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
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