[Qgis-developer] Thoughts on newly added "min-max map unit scale" feature

Nyall Dawson nyall.dawson at gmail.com
Thu May 8 15:13:28 PDT 2014

Hi all,

I've been playing with the newly added "min-max map unit scale"
feature. While this is a great feature to have, I think in it's
current form it's rather confusing for users.

Currently, when clicking the little settings icon next to a size in
map units, a dialog with "maximum scale" and "minimum scale" appears.
It's not immediately obvious as to what these settings actually do -
do they prevent the style showing outside these scale ranges? does the
symbol size reset to some default value outside these ranges? or is
the size clamped to the size it would take at these max/min scale
ranges? It took a bit of experimenting for me to work out that this
last behavior is what occurs.

I think it would make a lot more sense if these max/min sizes were
instead given in "mm", and the labels renamed to "Maximum size" /
"Minimum size". To me this is much more intuitive - it would be
immediately obvious that the size is set in map units, but limited so
that it never become larger or smaller than these set size limits.

This would take this feature from being an advanced feature which
takes a lot of experimenting to tweak correctly to something I'd use
on a regular basis!

What's everyone else's thoughts on this?


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