[QGIS-Developer] [Qgis-user] New Features in Shape Tools 3.2.0

[Paolo Cavallini]

Hi all,

thanks a lot for this. It's a beautiful example of how open source
works, finding and solving problems through collaboration and highly
skilled people. It would be nice if someone would write about this for a
wider audience.

All the best.


Il 10/02/2018 05:12 AM, Nyall Dawson ha scritto:
> On Mon, 1 Oct 2018 at 23:01, Helmut Kudrnovsky <hellik at web.de> wrote:
>> Helmut Kudrnovsky wrote
>>>> [...]
>>>> Caris LOTS: 14.737 km^2
>>>> ArcMap:     14.727,446 km^2
>>>> MapInfo:    14.727,352 km^2
>>>> GeoMedia:   14.726,443 km^2
>>>> Planimeter: 14.722,522 km^2
>>>> QGIS 3.2:   14.652,181 km^2
>>>> QGIS 2.8:   14.652,181 km^2
>>>> [...]
>>>> My suspicion is that the geodesic algorithm used by QGIS (and apparently
>>> GRASS) is to blame here.
>>>
>>> a quick check in GRASS 7.7.svn shows :-)
>>>
>>> |m2|km2|
>>> |14718097678,673|14.718,097679|
> Ok, with https://github.com/qgis/QGIS/pull/8090 QGIS now exactly
> matches GRASS' value (14.718 km2).
>
> (For reference -- not a regression, this bug has been around since
> ellipsoidal calculations were introduced to QGIS!)
>
> Nyall
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-- 
Paolo Cavallini - www.faunalia.eu
QGIS.ORG Chair:
http://planet.qgis.org/planet/user/28/tag/qgis%20board/