Hi Denis, Thanks for your reply! I think I was expecting the behaviour that you described.
As far as I understand, in OSM there are scale dependent features, for instance smaller streets, more labels, that won't show up in larger scale for the same extent. That's why I was expecting that when I use the 'magnifying glass' there won't be any new features showing up at the same extent, i.e. smaller streets or more labels. But there are, same as if I've changed the scale. Kind regards, Idan On 1 Mar 2018 19:00, "Denis Rouzaud" <denis.rouz...@gmail.com> wrote: Hi Idan, I'll reply for the part I'm aware of. Le jeu. 1 mars 2018 à 06:05, Idan Miara <i...@miara.com> a écrit : > 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 ? > Yes this expected. The idea of the magnifier is for having a "magnifier glass" to do scale-dependent editing. In my scenario, that was useful for fine-placement of labels. But if you don't have scale-dependent rendering (mainly labels I guess) or using map units instead of points for symology, it won't (shouldn't) change anything. > > 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.) > well, if you magnify with a fixed scale that will change the extent, you can't see as much features in the map. > > 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. > > Best wishes, Denis
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