It contains not only the lay of the land, but also detailed instructions. Some clear as day, some concealed.
This rendition of the map was designed and drawn by Daniel Reeve, who created the original prop for The Hobbit: An Unexpected Journey.
Weta's map has been made from a scan of the original and printed in Middle-earth (New Zealand) on the finest Italian Marina Conchiglia parchment paper.
The famous Moon Runes that play an important part in the story have been printed in a layer of high gloss varnish on the otherwise matt surface.
This is almost impossible to see in the product photographs and even to the naked eye it can be hard to spot, but in the right light they're visible and legible.
If you read Dwarven runes, of course.