To get a grasp of the lay of the land, and the distances involved, use North America as a guide
The capital of the Salassian Empire, Throneseat, lies in Kansas.
The Clockwork Kingdom of Mechanus has been built on the shores of Texas. The Yuan’sarran sea is the equivalent of the Caribbean.
The Great Glacier occupies all of Canada, and the Winter Court of the elves can be found in Quebec.
The rest isn’t detailed yet.