[postgis-users] Missing ESRI authority SRIDs in 'spatial_ref_sys'

[Mike Taves]

On Wed, 20 Sept 2023 at 19:31, Marco Boeringa <marco at boeringa.demon.nl> wrote:
> E.g. the Hammer-Aitof projection, SRID 54044 (https://epsg.io/54044) is
> missing. Any technical reasons why this is the case, or is the table due
> for an update?

You won't be able to do much with ESRI:54044 since it is not supported by PROJ:

$ projinfo -o PROJ ESRI:54044
PROJ.4 string:
Error when exporting to PROJ string: Unsupported conversion method:
Hammer_Aitoff

The other missing ESRI codes are similar, see:
https://github.com/OSGeo/PROJ/blob/55b1832a277eb7c0ee15c89a87c7d33dcda1cf8a/scripts/build_esri_projection_mapping.py#L741-L776

If support for these projections is needed, it would need to be
implemented in PROJ. This is best done through sponsorship:
https://proj.org/users.html#sponsors