[MapServer-dev] Motion: adopt RFC-142: Geodesic Scalebar Measurement

[Jeff McKenna]

Hi Tamas,

Thanks for your efforts on this. I am a +1. However, my only concern is 
which release this should be included in - my gut feeling is that this 
should be included in the MapServer 9.0.0 release.  It seems like quite 
a drastic change (but a big improvement) for a minor release.

This might also push us to release 9.0.0 sooner than later.

Thanks,

-jeff




On 2026-09-15 6:15 a.m., Tamas Szekeres via MapServer-dev wrote:
> Dear PSC,
> 
> I would like to motion to adoptRFC-142: Geodesic Scalebar 
> Measurement.Based on the discussion of this RFC <https:// 
> lists.osgeo.org/pipermail/mapserver-dev/2026-May/017361.html> I've 
> simplified the solution by removing the MEASURE parameter (therefore the 
> RFC has been renamed) and that the result represents horizontal local 
> scale at the map center (not bound to the actual scalebar location). 
> According to Even's suggestion, if the project has a CRS we use the 
> geodesic scale, otherwise fallback to cartesian method.
> 
> The modified RFC can be found here: https://mapserver.org/development/ 
> rfc/ms-rfc-142.html <https://mapserver.org/development/rfc/ms-rfc-142.html>
> 
> The corresponding PR with the suggested changes: https://github.com/ 
> MapServer/MapServer/pull/7507/changes <https://github.com/MapServer/ 
> MapServer/pull/7507/changes>
> 
> Starting with my +1,
> 
> Tamas
>