I’ve discussed things like the Weißwurst Equator before – see earlier entry, with diagrams.
Now Strange Maps has a new post on Germany’s Equators.
Scroll down for a map showing the Aldi equator, Weißbier/Weizenbier equator, Schaf(s)kopf equator, Guten Tag/Grüß Gott equator and two Weißwurst equators. I live in the Grüß Gott area, between the two Weißwurst equators. My feeling is that although I can buy Weißwurst everywhere here, it’s only south of the Danube that it is regarded as a big deal.