Comment Re:True North? (Score 3, Informative) 260
My guess, without having any particular knowledge, is that the factory will have some kind of internal grid system (fairly common), and aligning the factory with a compass direction means you can easily convert between internal coordinates and lat/lon GPS coordinates. Of course assuming you aren't converting by hand, it's not really hard to convert even if the factory were not axis-aligned.
I could be way off, but I can't think of another way that statement could make sense.