Alternative map of Magalan, created from the map pieces which you can find in the game. In total there are 16 pieces of the map scattered all over the world of the game. Collecting all pieces of the map and putting them together is an objective of "An Old Map" mission.
Map Pieces
Here is the list of all sixteen map pieces which you have to collected to put the whole map together:
Full list - Map Pieces.
Map Pieces
Direct links to each of the map pieces.