That is something that disappointed me about the Red Baron 3D map. The western front was sectioned off into four seperate quadrants and it wasn't possible to fly from one quadrant into another.
I remember wanting to take off flying from the the southern most point of the front and fly all the way to the English Channel. See the whole front in one continuous flight. But, in Red Baron that isn't possible because the front is divided into four distinct sections and when you come to the end of a section area you get a message saying go back, you have reached the end of the map. That is too restrictive for me! I want to be able to fly the whole front if I want.
I am hoping that KOE will put the entire front on one map. I read in one of the Aspect interviews that the map is already made and it reaches from the Swiss border to the English Channel, but I don't know if it is all in one continuous piece.