This map, is three-dimensional.
The land on which they stood, there was a vast continent, surrounded by oceans. Above these oceans, there were smaller continents, but compared to that huge landmass, these were merely islands.
Encircling this continent, there was a barrier that enveloped the land and the seas, forming an independent world.
Outside this world, there was a heaven filled with stars.
This was a cosmic space, boundless and endless.
"The continent we stand on, including these seas and islands, is known as the Origin World, shielded within the world barrier. Beyond the Origin World, lies the infinite starry sky. Within this endless expanse, there are numerous independent spaces and small worlds attached to it, collectively known as the Origin Great World or the Myriad Realms."
"Of course, the creatures of the infinite starry sky like to call it the real world."