QUOTE (Small Town Boy @ Jun 5 2008, 3:04 pm)

More specifically, I think it refers to the height above sea level, i.e. Oberbayern (Upper Bavaria) is around 500 metres above sea level, whereas Niederbayern (Lower Bavaria) can be as low as 300 metres.
Now you've got me confused: Würzburg, capital of Unterfranken, or Lower Franconia, is 177m above sea level; Bayreuth, capital of Oberfranken, or Upper Franconia, is 304m above sea level. Fine, your theory works up to now.
But Ansbach, capital of Mittelfranken, or Middle Franconia, is 405m above sea level!
QUOTE (Owain Glyndwr @ Jun 5 2008, 4:12 pm)

I wouldn't be absolutely certain that this is always the case. Schleißheim and Oberschleißheim have the same elevation of ca. 485m above sea level.
If by Schleißheim you mean
Airfield Schleißheim, it's 486m above sea level. There is no such place as Schleißheim.
Oberschleißheim is 483m above sea level.
Unterschleißheim is 473m above sea level.
So the airfield should be Überoberschleißheim.