Like most controlled user-based studies, this one had many limitations
that restrict the generality of our findings: although we
tested quite a complex city layout, we still managed to test only
a small sample of all possible city topography types; furthermore,
the study was performed on only one screen size and our task did
not require the subjects to interact in a real world setting. Nevertheless,
this study clearly allows us to better understand how users
tend to navigate under different interaction paradigms