When did this 'officially' change? "SQL-MM defines the default SRID of all geometry constructors as 0. PostGIS uses a default SRID of -1."

Michael Downey mdowney at esri.com
Fri Jan 30 10:59:44 PST 2026


Hello,

I see this note
"SQL-MM defines the default SRID of all geometry constructors as 0. PostGIS uses a default SRID of -1" on the PostGIS_Special_Functions_Index.html page all the way though 3.2
https://postgis.net/docs/manual-3.2/PostGIS_Special_Functions_Index.html

Since then it is not there.

I have not checked this question under versions < 3.4. AI results indicate that it was 3.0 when it started. A question from a user in our community indicates 2.0.

Perhaps it started at an earlier time and culminated at 3.3?

Thanks,
Michael

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