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

Thu Feb 18 01:43:49 PST 2021

On 2021-02-18 09:55, Hernán De Angelis wrote:
> 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
>
Just to report this is fixed in master now and will appear in 3.16.4.