Measuring The Diameter Of Ancient Coins

@bdc, for coins that are obviously oblong, I take max/min measurements and for coins with a big chip I avoid that spot when measuring the diameter. Otherwise, I just grab a typical diameter and don't put a huge amount of thought or planning into it. I'm sure others are more particular about this part of the documentation.

I don't know how it works for ancient coins, per se. But when we photodocumented small metal features for chips and circuit boards, the measurement scale was purely to calibrate your software measurements. Once you could reference the exact scale in the image, you could accurately measure any feature point-to-point.

I guess what I am saying is this: If you are recording approximate measurements in a logbook, cool. Documenting the coin with digital photos, maybe have a reliable measurement scale in at least one image, which will serve to precisely document the scale of all features.