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

[Nyall Dawson]

On Wed, 26 Sep 2018 at 03:52, Helmut Kudrnovsky <hellik at web.de> 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|

Hi Helmut,

I'm struggling to work out where the difference lies between the code
paths. Do you mind sharing the values from the st state struct when
G_ellipsoid_polygon_area is called for this polygon?

Nyall

>
>
>
> -----
> best regards
> Helmut
> --
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