The problem is when are you zooming and when are you rotating? Google Maps on the phone is a great example. I find myself using "tap then flick up or down" or j

The problem is when are you zooming and when are you rotating? Google Maps on the phone is a great example. I find myself using "tap then flick up or down" or just the +- buttons much more useful because they don't require my second hand and won't accidentally rotate the map.