Many believe it's the town, but it is the map room. As can be seen with the airfields without towns on some newer maps. But then it cannot be exactly the map room, because v/p fields don't show it.
What would also help is to draw the map room on top of the tanks, and in a different color. And/or to draw the tanks smaller. In AH2 plane dots couldn't really hide it.
Tanks rarely get right on top of it, and the map can be zoomed in far enough to distinguish them.
