[PROJ] Equirectangular/Equidistant Cylindrical

[Even Rouault]

Access to the PDF to try spotting the cause of the 
"proj_create_from_database: crs not found" error & possibly solving it 
would still be interesting

Le 13/10/2022 à 15:31, Andrew Patterson a écrit :
> Even,
>
> So while I was writing up the issue I realized I could probably 
> provide some simple code to help illustrate the problem, so I wrote 
> some. Then I realized I should really run it in our old app as well, 
> which took a while -- which is why you're reading this today rather 
> than yesterday. But in the course of doing this, I basically proved 
> that PROJ is fine, so there's no reason to create the issue. So false 
> alarm!
>
> Plotting on the maps is a two step process; coordinate transform via 
> PROJ from WGS84 to the map's projection, then run that coordinate 
> through a world-to-page (i.e. pixel) transform. The latter is *really* 
> easy to test so that's always the first thing I verify. Once that's 
> been done, the problem basically has to lie with the PROJ transform -- 
> and this has been true until now. I'm actually quite perplexed. If 
> both parts of a two-part transformation are fine, why is everything 
> shifted? Something is hinky, but that's my problem not yours, so I 
> apologize for wasting your time with this. I think I also jumped the 
> gun because of problems with Equidistant Cylindrical in the past, but 
> for once, that project is innocent.
>
> Again, sorry for the trouble!
>
-- 
http://www.spatialys.com
My software is free, but my time generally not.