I guess you're in for a rude shock then, as Von Luschan has relatively little to do with positioning and everything to do with human migratory patterns.Unless you think a 30°+ band is informative, I guess.
Decloak: Though at 3000 BC, I don't think human migrations would be able to outrun the pace of skin colour change in the same way that has happened in the past 500 years or so.