Well, it is good that you are discussing these questions with your team.

In the meantime, perhaps including a scale bar on your map would be a good idea.

Another thing you could try (this has only just occurred to me, so I don't know how well it would work) is create an image that shows Arcádia alongside satellite (GoogleEarth) images of other cities (Manhattan, São Paulo, Rio de Janeiro, Florianópolis), just to make it easier to compare. It might be a valuable exercise.

THW