Getting Lost in Westeros

As someone who dabbles in map illustrations for wedding invitations, I can't even wrap my head around the task of mapping the entire geography of Westeros, the setting for George R. R. Martin's Game of Thrones books. This is an interesting behind the scenes look at what it is to create epic maps (literally and figuratively):  http://huffingtonpost.com/jonathan-roberts/mapping-westeros_b_2365403.html