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

[Tobias Wendorff]

Dear Paolo,

Am Do, 25.05.2017, 18:36 schrieb Paolo Cavallini:
> this has been raised by me some time ago, and has been discussed
> on the mailing list (qgis-dev, if I remember correctly). It turned
> out that it is more complicated than expected. Please check
> the archives of the list for a better understanding.

I'll have a look, but I think, the DEVs seem to overcomplicate
this problem. There's a problem when SRIDs of source layers aren't
equal. So the simplest solution is to show a messagebox that
results won't be metric when one or both of the SRIDs aren't in
a metric projects. The proper solution would be to switch to
a geodetic length. I can give advices to a developer, how to do this.

> As a side not, please avoid using provocative terms: everyone here is
> doing his best, and donate their work to the world at large.
> All the best.

Sorry, I don't see a problem here. QGIS is telling, output will be
in meters, but it isn't - so it's a lie. The worst thing is that
there is no warning about the output NOT being metric. This will
make interpretation of the data or automatic post-processing be
invalid.

I'm also doing hard work to make QGIS being accepted in the
educational world, but those problems make the users think
"Why change?".

Best regards,
Tobias