Pixie, this is no world modeling of earth-like planet. This is fake-realistic world. Because this worl under big air dome, space - is a big ocean and if you go to east/west/north/south on the sea you come in space. The sun this is underside of this land and this land is underside of sun.It is like a split personality of the demiurge. (when\if i finish this world I will draw si-fi earth-like world with correct tectonic plates, erosion and etc. Sorry if I disappointed you) But culture, history born in this world like in real world(with small magic odour)
I will change border (or delete)if it embarrasses you So there isn`t curvature projection.