Could anybody explain how the world of PS actually looks

...I mean i've been trying to understand how the map of the world of PS some how turns into eight levels of earth...unless these levels haven't been made yet and right now everything is just a flat kind of square-ish thing

.
I even looked at the map on the main site(i'd put the url down but i'm using a french keyboard right now and it's crrrrazy

).
And then I tried to imagine the PS world laid out like that...or how it'll end up all together...so if somebody could kindly describe to me how the world of PS looks now, or how it's supposed to look, that would be grrrrreeaaat*Tony the tiger jumps up out of nowhere*

Edit:

but I have another tiny question. In the PS history they talk about Laanx as a her

, then bam it's a him

. How does that happen

!Ahahahhaha. And don't tell me to go search it up. Because I did and I just came up with thousands upon thousands of threads all talking about quests and the history of PS.