[PROJ] spilhaus regresssion test failures

[Javier Jimenez Shaw]

On Sun, 4 May 2025 at 16:32, Greg Troxel <gdt at lexort.com> wrote:

> Javier Jimenez Shaw <j1 at jimenezshaw.com> writes:
>
> > The failures in the roundtrip suggest that the problem is in the inverse
> > function of the spilhaus projection.
> > Part of the code used there was refactored end of March in master, and
> > maybe the new code/formulation behaves better in NetBSD.
> >
> > Could you test master in your environment?
>
> Thanks for the hint.  I ran a build/check from git master, and got a
> clean pass.
>
> I guess we don't know if the problem was in the previous code, or it was
> ok and triggers a NetBSD bug, but I would guess since you changed things
> on master you think it's better and there's no need to dig into it.
>
>
The PR was https://github.com/OSGeo/PROJ/pull/4446

Maybe the function that impacts the tests is "pj_conformal_lat_inverse".
You can try with the new implementation.
The changes should be small. (See that the signature of the function is a
bit different). It is used only in one place.


>
>   17/68 Testing: spilhaus
>   17/68 Test: spilhaus
>   Command: "/n0/gdt/SOFTWARE/GEO/PROJ/proj/BUILD/bin/gie"
> "/n0/gdt/SOFTWARE/GEO/PROJ/proj/test/gie/spilhaus.gie"
>   Directory: /n0/gdt/SOFTWARE/GEO/PROJ/proj/test
>   "spilhaus" start time: May 04 10:17 EDT
>   Output:
>   ----------------------------------------------------------
>
> -------------------------------------------------------------------------------
>   Reading file '/n0/gdt/SOFTWARE/GEO/PROJ/proj/test/gie/spilhaus.gie'
>
> -------------------------------------------------------------------------------
>   total: 133 tests succeeded,  0 tests skipped,  0 tests failed.
>
> -------------------------------------------------------------------------------
>   <end of output>
>   Test time =   0.04 sec
>   ----------------------------------------------------------
>   Test Passed.
>   "spilhaus" end time: May 04 10:17 EDT
>   "spilhaus" time elapsed: 00:00:00
>   17/68 Testing: spilhaus
>   17/68 Test: spilhaus
>   Command: "/n0/gdt/SOFTWARE/GEO/PROJ/proj/BUILD/bin/gie"
> "/n0/gdt/SOFTWARE/GEO/PROJ/proj/test/gie/spilhaus.gie"
>   Directory: /n0/gdt/SOFTWARE/GEO/PROJ/proj/test
>   "spilhaus" start time: May 04 10:17 EDT
>   Output:
>   ----------------------------------------------------------
>
> -------------------------------------------------------------------------------
>   Reading file '/n0/gdt/SOFTWARE/GEO/PROJ/proj/test/gie/spilhaus.gie'
>
> -------------------------------------------------------------------------------
>   total: 133 tests succeeded,  0 tests skipped,  0 tests failed.
>
> -------------------------------------------------------------------------------
>   <end of output>
>   Test time =   0.04 sec
>   ----------------------------------------------------------
>   Test Passed.
>   "spilhaus" end time: May 04 10:17 EDT
>   "spilhaus" time elapsed: 00:00:00
>
>
> You may be amused by this test failure:
>
>   Test 95 failed
>   /n0/gdt/SOFTWARE/GEO/PROJ/proj/BUILD/bin/projinfo completion projinfo
> --pivot-crs
>   Different stdout+stderr returned (+) than expected (-):
>   - always if_no_direct_transformation never EPSG: ESRI: IAU_2015: IGNF:
> NKG: NRCAN: OGC: PROJ:
>   + always if_no_direct_transformation never EPSG: ESRI: IAU_2015: IGNF:
> NKG: NRCAN: NSRS: OGC: PROJ:
>   ?
>           ++++++
>
> which is obviously not an actual bug -- I had your NSRS db hooked in via
> PROJ_AUX_DB.
>
The auxiliary database usage is not widely tested. That command is printing
all the authorities, and you have a new one ;)
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