[Qgis-user] Wrong area count QGIS 3.20+?

[Andrea Giudiceandrea]

> Sebastian Gutwein 
> <https://www.mail-archive.com/search?l=qgis-user@lists.osgeo.org&q=from:%22Sebastian+Gutwein%22>Mon, 
> 03 Jan 2022 05:44:08 -0800 
> <https://www.mail-archive.com/search?l=qgis-user@lists.osgeo.org&q=date:20220103>
>
> If I am reading the pull requests
> correctly even Grass has switched to the Geographic Lib method.

Hi Sebastian,
AFAIK, GRASS GIS has not yet switched to the GeographicLib routines.
See the feature request https://github.com/OSGeo/grass/issues/1235 not 
yet closed and the related PR https://github.com/OSGeo/grass/pull/1283 
in draft status and not yet merged.

> Sadowski Jarosław 
> <https://www.mail-archive.com/search?l=qgis-user@lists.osgeo.org&q=from:%22Sadowski+Jaros%C5%82aw%22>Sun, 
> 02 Jan 2022 23:58:06 -0800 
> <https://www.mail-archive.com/search?l=qgis-user@lists.osgeo.org&q=date:20220102>
>
> I must admit that, for me as a GIS operator, it is surprising and sounds like
> bad news - so far surfaces have always been the same in various GIS software,
> whether or not it was open-source or commercial (ArcGIS Pro). So from this
> moment it will be that I will get different surfaces depending on the software
> it was calculated? :(

Hi Jarosław,
it seems to me the calculation of a polygon area on the ellipsoid was 
always not the same in different GIS software.
See, for example, these long threads at 
https://www.mail-archive.com/qgis-developer@lists.osgeo.org/msg43978.html 
and 
https://www.mail-archive.com/qgis-developer@lists.osgeo.org/msg43978.html

Best regards.

Andrea Giudiceandrea
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