Not sure if only taking into account the % of voters that precisely mapped where Iran is located is enough, as it would put someone that selected Egypt and South America in the same group (wrongly identified the location).

I would prefer an 'average distance from the border' analysis, in which we would be able to compare which group is clearly unaware of Iran's location (selecting Europe or even North America, for example) and which group at least has a basic idea of the location (Middle East).