[PROJ] Tie breakers used when ordering candidate operations

[Kristian Evers]

Nyall,

Have you had a look at https://proj.org/operations/operations_computation.html <https://proj.org/operations/operations_computation.html> ?
It’s a bit of a long read but it explains the logic behind what transformations are
chosen under various circumstances.

/Kristian

> On 9 Feb 2021, at 23:38, Nyall Dawson <nyall.dawson at gmail.com> wrote:
> 
> Hi list,
> 
> I'm after a quick summary of what tie-breakers are used to sort
> candidate operations when a number of operations have the same
> reported accuracy.
> 
> I have a vague recollection that one logic is that larger number
> transforms are picked, .i.e. " WGS 84 to GDA2020 (3)" is picked over
> "WGS 84 to GDA2020 (2)", but I may be mistaken!
> 
> Is anyone able to quickly summarise the sorting order of operations or
> can direct me to the relevant part of the code for me to determine
> this?
> 
> Thanks!
> Nyall
> _______________________________________________
> PROJ mailing list
> PROJ at lists.osgeo.org
> https://lists.osgeo.org/mailman/listinfo/proj

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/proj/attachments/20210209/0c253973/attachment-0001.html>