[postgis-devel] Much slower processing on GEOS 3.9.0 versus 3.8.0 for geodesic area calculation - Upgrade to PROJ 7.2.1 causes issue

Paul Ramsey pramsey at cleverelephant.ca
Fri Apr 30 08:16:34 PDT 2021

> On Apr 30, 2021, at 1:05 AM, Marco Boeringa <marco at boeringa.demon.nl> wrote:
> Lastly, I am still a bit worried about the fact that 'SELECT postgis_full_version()' returns the old '6.3.1' PROJ version number after upgrading PROJ to '7.2.1'. Is there any logical explanation for this, e.g. 'postgis_full_version' only ever returning the version number of the PROJ it was originally compiled against, so never displaying the upgrade?

Sure, it’s fairly common, all you need is a library where the version information is communicated via compile-time #defines rather than a run-time getversion() function. Or a library that does both (like proj) and the implementing application uses the #defines. Early proj4 only had #defines, so it wouldn’t be surprising to find apps that still use them, even though modern proj has a runtime proj_version() available.

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