To be precise, a map of the Kingdom of Camelot as put together by the creators of BBC’s Merlin.
This doesn’t explain how the geography seems to move about in direct correlation to how long the script writers need Arthur/Merlin/the Knights etc. to be on the road but it does give a little insight into how it all fits together.
In ‘This is the beginning‘ (my Season 4 Merlin fan fic which will be finished eventually, promise!) everything is as above apart from my renaming Caerleon.
Dumnonia – Ruled by King Cador and to the south west, below the Labyrinth of Gedref.
Glysswing – Ruled by King Tewdrig and to the north west, this is what I have renamed Caerleon as Caerleon is a town not a kingdom in Wales.
Powys – Ruled by Cygen and also to the north west, above to Glysswing.