Imprecision on scale dependant rendering about qwc2-demo-app HOT 3 OPEN

Hello @manisandro,

No idea about that one ?

Thanks again,
Rergards, Clément.

from qwc2-demo-app.

At a first glance I'd say this could be because QGIS Server internally recomputes the scale based on the geographic bounding box, the dpi and the rendering pixel size, and the result may be slightly different than the scale displayed in the web client.

from qwc2-demo-app.

Yes Qgis server seems to use bbox, height, width and dpi to compute the scale, but the thing is that in desktop the scale is rendered corectly using 96 dpi but not in the web client. The request I've linked above is the way the client call the Qgis server.

Maybe the bbox computed by the client is a bit off compared to the one computed by a Qgis Desktop.

Using 96.001 is not a problem using the webclient without print template, but when tyou try to print it'll print with a 96 like dpi and the scale will be off again.

It would be nice if the web client would render the wms the same way as a Qgis desktop regarding the scale.

I'll try to look into it as well.

from qwc2-demo-app.