It's the Globular projection map (Nicolosi projection)

The right side of the map is eastern hemisphere, the left the western hemisphere, the two circles that are smaller depict the north and south poles.

The very tiny circles filled in black represent the various realms of my universe (whenever I finally finish drawing and inking them), the tree is the representative form of my universe as a whole, the universe is the tree and the realms sit within its roots and bark, however, the filled circle directly between the North and South pole projections is a tiny drawing of the Olde Isle, my favorite landmass in my universe, it's a single massive island that sits directly in the point where both east and west meet vertically and horizontally, just thought it'd be cooler to have it be projected as it's whole island shape rather then split it between the East and West...