[QGIS-Developer] WARNING No QgsCoordinateTransformContext context set for transform

[Mathieu Pellerin]

Andreas,

I've dealt with two sources of such warnings today, one which caused one
warning on every canvas redraw (the north arrow decoration), the other
caused many warnings upon (re-)drawing the content of the overview panel.

One of the few remaining sources of warnings is with the WMS/XYZ raster
provider. But that's unlikely to be tackled prior to release of 3.0.
Fortunatelly, the warnings are harmless, and won't show on non-debug builds.

Math

On Tue, Jan 30, 2018 at 7:56 PM, Andreas Neumann <a.neumann at carto.net>
wrote:

> Hi,
>
> I have a QGIS project with a history (started in QGIS 2.x) that we carried
> over to QGIS 3.
>
> Since some time (some weeks) for every redraw I get several times
> (probably for every layer) the following warning message in the "Qt" log
> message panel:
>
> 2018-01-30T13:51:13 WARNING No QgsCoordinateTransformContext context set
> for transform
> 2018-01-30T13:51:13 WARNING No QgsCoordinateTransformContext context set
> for transform
> 2018-01-30T13:51:13 WARNING No QgsCoordinateTransformContext context set
> for transform
> 2018-01-30T13:51:13 WARNING No QgsCoordinateTransformContext context set
> for transform
> 2018-01-30T13:51:13 WARNING No QgsCoordinateTransformContext context set
> for transform
> 2018-01-30T13:51:13 WARNING No QgsCoordinateTransformContext context set
> for transform
> 2018-01-30T13:51:13 WARNING No QgsCoordinateTransformContext context set
> for transform
>
> I believe this has to do with the recent changes in datum handling.
>
> But how would I fix the issue to get rid of the flood of warning messages?
> After a few redraws there are thousands iterations of the same warning
> message.
>
> Thank you for your help!
>
> Andreas
>
>
>
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