[GRASS-user] v.to.db area calculations

[Moritz Lennert]

On 18/05/17 18:41, Blumentrath, Stefan wrote:
> Hi James,
>
> QGIS uses a ellipsoidal area measurement, while GRASS (like most of the other GIS) uses a Cartesian measurement (others, please correct me if that is not the case in WGS84).
>
> See amongst others:
> https://issues.qgis.org/issues/12057 and
> https://issues.qgis.org/issues/14675
>
> Would you mind comparing area measurement of a third software (SAGA, PostGIS, ...)?

I would suggest making tests with polygons of which you know the area 
(e.g. simple squares to begin with)

Moritz