Map of River Basins of South Africa that went viral

Can you name the river closest to where you live? Have you ever seen that river on a map? How would you react if you saw that river, and others near you, in a map unlike others you have seen before?

We have spent a lot of time considering these questions and others related particularly to maps since a map of southern Africa’s rivers that one of us, Sukhmani, created and posted on Facebook. The post went viral.