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 via postgis-users <[email protected]> Fri, 30 Jan 2026 18:59:44 +0000
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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 pag=
e 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 in=
dicates 2.0.
Perhaps it started at an earlier time and culminated at 3.3?
Thanks,
Michael
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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Hello,<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p> </o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">I see this note <o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">“SQL-MM defin=
es the default SRID of all geometry constructors as 0. PostGIS uses a defau=
lt SRID of -1" on the PostGIS_Special_Functions_Index.html page all th=
e way though 3.2<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><a href=3D"https://=
postgis.net/docs/manual-3.2/PostGIS_Special_Functions_Index.html">https://p=
ostgis.net/docs/manual-3.2/PostGIS_Special_Functions_Index.html</a><o:p></o=
:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p> </o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Since then it is no=
t there.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p> </o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">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.<o:p=
></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p> </o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Perhaps it started =
at an earlier time and culminated at 3.3?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p> </o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Thanks,<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Michael<o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p> </o:p></=
span></p>
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