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

[Seth G]

+1 thanks Tamas. 

(as an aside, QGIS also seems to default to centre of the map for scale: https://docs.qgis.org/3.44/en/docs/user_manual/introduction/qgis_configuration.html#scale-calculation-method)

Seth

On Tue, Sep 15, 2026, at 11:15 AM, Tamas Szekeres via MapServer-dev wrote:
> Dear PSC,
> 
> I would like to motion to adopt RFC-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
> 
> The corresponding PR with the suggested changes: https://github.com/MapServer/MapServer/pull/7507/changes
> 
> Starting with my +1,
> 
> Tamas
> _______________________________________________
> MapServer-dev mailing list
> MapServer-dev at lists.osgeo.org
> https://lists.osgeo.org/mailman/listinfo/mapserver-dev
> 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/mapserver-dev/attachments/20260916/41c0afb7/attachment.htm>