[QGIS-Developer] Scale/Magnifier/Units per pixel

[Idan Miara]

Hi,

I was examining the Scale/Magnifier widget in QGIS3.

I couldn't find any difference in the output picture between the following
combinations (example):
Scale 1:1,000 and magnifier 1000%
Scale 1:10,000 and magnifier 100%
Scale 1:100,000 and magnifier 10%
Is this by design ?

I was expecting a different results, for instance, if I load OSM, and I
change the magnifier while the scale is fixed I was expecting to see the
same rendered image, just smaller/larger (i.e. same map features, no new
labels/roads etc.)

Also, is there an option to set the resolution in Map Units per pixel, i.e.:
Meters Per Pixels (when the units are meters, as in UTM) or
Degrees/Seconds per pixel (when the units are Degrees, as in Geographic) ?

I guess it makes more sense for most people to use Scale, but when I want
to examine specific pixels of a raster usually it's easier for me to think
in Meters Per Pixels in respect to the Map Units, for instance, when I know
that my map is in 10 Meters per pixel, then if I set the Map canvas
resolution to the same value of 10 Meters per pixel I expect to see the
pixels in 1:1 as one pixel on the raster is one pixel on the map canvas.

Regards,
Idan.
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