[QGIS-Developer] Is the measurement tool using proj library?

[C Hamilton]

Andreas,

How do your results compare with the "Shape Tools" measurement tool? It is
based on the geographiclib library.

Calvin

On Thu, Jul 18, 2019 at 10:38 AM Andreas Neumann <a.neumann at carto.net>
wrote:

> Hi,
>
> We are having issues on the QGIS 3.4 release that the difference between
> and ellipsoidical and planimetric distance (and area) is huge. Too huge.
>
> We have this issue on Windows 3.4.9, but on Linux (a bit newer commit) I
> don't have the same huge difference, but rather a very reasonable one.
>
> I noticed that while the Windows version was built with proj 520 and the
> Linux version with 493, so a bit older.
>
> But I don't know if the measurement tool in QGIS is using proj at all or
> not? If yes, could it be that newer proj releases made things worse
> regarding ellipsoidical measurements?
>
> Thanks,
> Andreas
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