There are a lot of things it doesn't explain.
Like, what about the people living on the other side of the earth... hollow earth stories exist in so many ancient stories.
Also, what is the firmament? What is the shape of that?

A strictly flat map does not allow you to sail your ship to any point. You still need to use great arcs.
So, there is something more.

There is so much more to know about our planet.