There are a number of maps in Skyrim, mostly in the Jarls' palaces or various camps. All of these maps have flags placed in them to mark Imperial or Stormcloak territories. When I "use" one of these flags, a message pops up saying "Map Updated". However, at this stage in the game, my map is such a mess I wouldn't be able to really tell if anything changed on it or not.
Can someone tell me exactly what sort of update is being done here?