Depends on the map you're talking about, since there's more than one map that the flat earth community uses.
However, a popular one is the 'Ice wall map', with the antarctic represented as a sort of Ice Wall around the edge of the disc, with the north pole at the center. That map has some...interesting proportions that don't really comport too well with established measurements.
Of course, that MIGHT be because it's a projection of a globe map called the Azimuthal Equidistant projection, (also called the Gleeson Projection, I think), but eh, what do we know?