A Mesopotamian precedent
The Babylonian Map of the World, a clay tablet of about the 6th century BCE in the British Museum, draws the known world as a disc surrounded by a bitter river, with Babylon at the centre and distant regions marked as triangles beyond — one of the oldest surviving attempts to picture the whole Earth.
The two best first targets
1. Tiamat — the primordial sea, often imagined as a vast dragon or serpent; seafloor forms suit her. 2. The lamassu — a winged bull or lion with a human head. Strong alternates: Gilgamesh holding a lion, the Bull of Heaven, and Utnapishtim’s ark.