[Qgis-user] Can we make QGIS stop lying?

[C Hamilton]

I agree with Tobias on this. I am not sure what all the issues are and I
know it can get complicated but more than once I have been bitten with
wrong answers because of this.

I think it would be good to have a check box or drop down menu to be able
to select geodesic routines to be used by the measure tool.

If I ever get a QGIS development environment set up I have wanted to
incorporate geographiclib routines (as it is better than Vincenty) as core
routines assuming the work would be accepted. There are a number of
geodesic algorithms missing from the QGIS API that would be good to add as
well.

Calvin

On Thu, May 25, 2017 at 2:16 PM, Tobias Wendorff <
tobias.wendorff at tu-dortmund.de> wrote:

> Hi Carlos,
>
> Am Do, 25.05.2017, 19:30 schrieb Carlos Cerdán:
> > I understand your frustation (I've lived it), but QGIS doesn't lie,
> > it is different from the way that some topics are done in another
> > GIS.
>
> I know, but the field, where you can select the output clearly shows
> "meters". So I expect the output to be meters. Why not write
> "same as input"? Then it's not a lie anymore (other GIS do so).
>
> > You can get right metric values even if your layer and project are
> > in Lat-long units.
>
> [snip]
>
> Yeah, I know this workflow, I am using it every day. But it's
> nearly impossible to explain to the audition, why QGIS has this
> kind of unexpected behavior. For a GIS, it should be a problem to
> calculate distance as geodetic lines. I can tell any developer,
> how to do it.
>
> The best way would be to fix the GUI or do a work-around with a
> warning messagebox like I explain to Paolo. This would solve this
> problem.
>
> FYI: I'm trying to convince users in the educational area to
> switch to QGIS. Actually, they don't see those workflows as part
> of "freedom", they see it as a bug.
>
> When an output field says "meters", you can expect it to be metric.
> When an output field says "like input", you don't expect it to be
> metric. Problem solved.
>
> Best regards,
> Tobias
>
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