On 2/9/22 03:31, Sandro Santilli wrote:
Would you be disappointed/surprised by a PostGIS upgrade
replacing your custom entries above 200000 with some new
"official" entry ? What strategy did you set in place to
prevent this ?

I missed the second part in my first reply.

As it stands it would break things. The strategy at the time (again this was 
decided before 2010) was there weren't any EPSG codes in that range and the 
supplied spatial_ref_sys table at the time appeared to just mirror the EPSG 
codes.

How do other people handle conflicting srids?

For example, if I do a pg_dump of some tables from one database with some 
custom srids (for argument sake say they are in the bespoke custom range) and 
want to restore it to another database with a different set of custom codes 
(say it has the srs I need, but the srid is different) how does that work?  If 
I use OGR, it will probably figure it out, but OGR doesn't necessarily capture 
everything pg_dump does (constraints, triggers, grants, etc).
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