First I took this symbol
Then I turned the symbol into a Atlas Map using the trace feature in Hexographer.
As you can see the world does not follow real world geography or climate..
|The World of Triskelion|
The Land is divided into four unique realms, each has a color, alignment and magical theme.
In the center, there is a lake of quick sliver that is a portal to the other side of world,
The world is going to shaped like a thick disc. I am thinking that all together their will six realms. and may be an interior underdark style realm.