[Qgis-developer] Meaning of "Canvas Units" in project properties?!?

[Nyall Dawson]

On 20 October 2015 at 20:47, Giovanni Manghi <giovanni.manghi at gmail.com> wrote:
> Hi Nyall,
>
>
>> I'm trying to get to the bottom of http://hub.qgis.org/issues/11986
>> (Area calculation is wrong with OTF enabled), but even after reading
>> the source I'm struggling to understand how QGIS is supposed to be
>> handling this. And if a developer who CAN read the source has no idea,
>> how are normal users supposed to understand this? ;)
>
> I guess the right ticket is now this one
>
> http://hub.qgis.org/issues/13209
>
> right? Too bad there was no feedback, does this probably mean that we
> will have again a release with wrong area measures? I have put quite a
> lot of effort in testing this issue, see for example
> http://hub.qgis.org/issues/12057, but now I'm out of time. Shouldn't
> the reference ticket be tagged as blocker (I mean, we should not
> really ship the new release with this issue unresolved...).

The thing is, I'm not convinced the area is wrong... it's just that
QGIS' handling of units with OTF on/off ellipsoid ON/OFF is extremely
confusing (ie, I don't even fully understand it). That's what I was
hoping to get to the bottom of with this question... but we're out of
time for this, I'm too cautious to make large changes which would be
required to change this behaviour this late in the cycle.

Nyall

>
> cheers!
>
> -- g --
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