Is that really necessary since the compass doesn't rotate and the map and compass are always aligned in the same direction anyway.
On a side note if we didn't call it north, which I know its not since its space, what would we use to describe direction on a map without the use of cardinal directions?
You orient yourself to the largest stationary body. In Galactic navigation, you orient yourself to the Galactic Core. The directions are not North, South, East, West, but Coreward, Edgeward, Spinward, and Anti-Spinward.