[postgis-devel] ST_Normalize issues (was ST_Reverse issues)

[Sandro Santilli]

On Thu, Jun 24, 2021 at 08:17:04AM -0700, Paul Ramsey wrote:
> The linestrings that are output from an OverlayNG Union operation are not necessarily oriented the same as those output by an old style Overlay, and in order to harmonize regression results when bringing in GEOS 3.9 (NG) with results run against older GEOS, normalize was made more stringent.

What does it mean, exactly, for Normalize to being more stringent ?
How did it change ? Where is it documented ?

--strk;