I have elevation data in SRID 7405 (Ordinance Survey Great Britain 1936 with
Ordinance Datum Newlyn) and I want to convert it to SRID 4979 (World Geodetic
System 1984 ensemble).
Both SRs have three axes defined in their spatial_ref_sys entries.
However, ST_Transform doesn't change the Z coordinate.
SELECT ST_Transform('SRID=7405;POINT(545068 258591 8.51)'::geometry, 4979);
-> POINT(0.121585415593599 52.206415868084655 8.51)
Am I missing something?
Also asked on SE: https://gis.stackexchange.com/q/447648/183667
Tried with postgres12-postgis3.0 and postgres14-postgis3.2.
Thanks,
James
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