Zoom IN/OUT or Zoom OUT/IN (+/- or -/+)
If you would mark zoom-buttons by description, position of "ZoomIN" would be logicaly under "ZoomOUT", because if you are watching map and zooming IN, you are going deeper into the map -> DOWN. Vice versa if you are zooming OUT, you are going higher -> UP
Now are buttons marked by mathematical signs a positioned by mathematical logic: + is up, - is down.
I would prefer map logic, not mathematical in this case :)
(as many map apps uses "Click+DrawUP" for zooming out(-), "Click+DrawDN" for zooming in(+))
Priority: low
Edited by Vitek