[PROJ] "Local" projection method?

[Nyall Dawson]

On Thu, 24 Sep 2020 at 09:33, Nyall Dawson <nyall.dawson at gmail.com> wrote:
>

> I've been trying to research exactly what this "Local" projection means.
>
> There's some documentation for it here:
> https://pro.arcgis.com/en/pro-app/help/mapping/properties/local.htm
>

There's also this comment:
https://community.esri.com/thread/245500-the-local-projection-and-its-matehamtics#comment-898492

"EPSG is planning to add the Local projection to its registry. I've
been slowly, very slowly writing up the mathematics so that it can be
published in the 7-2 Guidance Note. I'm hoping to finish it up over
the holidays."

But that's the last mention I can find relating to this promised write up...

Nyall