srtext 2048 length limit

[Regina Obe]

> 
> > On May 21, 2025, at 7:43 AM, Regina Obe <lr at pcorp.us> wrote:
> >
> > The general advice is if you want to make changes, you should make it in
> your proj.db database since that is the first source of truth for PostGIS these
> days.
> >
> 
> Er, not really. If you want to change an INSTALLED srs, then you kind of have to
> do it in proj.db, since that’s the first place we check when dereferencing an
> SRID number. If you want to ADD a new srs, you can add a line to
> spatial_ref_sys. Frankly, even if you wanted to change an existing srs, the
> smart thing to do would be to add a new line and a new srid number to
> spatial_ref_sys, because there’s nothing stopping proj.db from being over-
> written by software upgrades etc.
> 
> P=

But if you added it to proj.db too with just the new srid you added in spatial_ref_sys wouldn't it read from proj.db?

The reason I was thinking it's the preferred way is I recall a while back on this list someone wanting to add a custom spatial_ref_sys to PostGIS,
But they needed it to agree everywhere, e.g. in their QGIS use, the mapserver use etc, so they always aligned their proj.dbs in use to be the same.

I guess if all you care about is PostGIS, then it doesn't much matter.

We do read the srtext these days if it is not in proj.db already right and pass it off to proj to decipher?