[Qgis-user] Scale bar length: mismatch between stated length and measured length

Thu Feb 18 00:55:26 PST 2021

On 2021-02-18 09:17, Hernán De Angelis wrote:
> I am experiencing a weird issue with the scale bar length: the stated 
> length does not match the measured length. This happens in several 
> projects, both existing and new. In all tested cases both layer and 
> project CRS are the same and there is no EPSG:3857, 4326 or layers 
> that use mixed CRS. The default unit is meters. Also, the mismatch is 
> far greater than any difference between ellipsoidal and cartesian 
> distances. See example below in UTM44N, but also seen in 18S and 34N.
>
> Any idea of what may be wrong here?
>
> Using QGIS 3.16.3, with PROJ 7.2.1.
>
I see it may be related to this closed issue:

https://github.com/qgis/QGIS/issues/40748