[tinbad]

Yep. It seems that most people were actually quite close (with the majority at least pointing at other Eastern European countries) and, like you pointed out: most people from Europe wouldn't do much better. An even better comparison would be to ask Europeans about the location of different US states, I'm pretty sure the results would be very poor, if not worse.

[AJ007]

I don't know what Survey Sampling charges but a Mapbox hack + a $1,000-$2,000 ad campaign, run internationally, could accomplish this.