Haven't seen anything like that, sorry, however, if you want to familiarise yourself with different map types the best way is to go into the scenario editor and just keep generating maps of each type so you eventually pick up on what features are particular to each - sooner or late you find that e.g. one medit or coastal is pretty much like another, placement of resources varies a bit and there is always an element of luck where placement is concerned, but you'll soon see what makes each one unique.