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

[Hernán De Angelis]

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.




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