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

[Sebastian Gutwein]

Thanks for the clarification Andrea. Reading the threads and pull requests
is a fascinating look into the muddy waters of really small numbers and
curved areas.

On Tue, Jan 4, 2022 at 10:07 PM Andrea Giudiceandrea <andreaerdna at libero.it>
wrote:

> 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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-- 
Sent from a phone. Amazing! But possibly garbled. Sebastian Gutwein
Regenerative Design Group 1 Chevalier Ave Greenfield MA Bas at rdgland.com
(631) 241-1018
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