I hadn’t realized that there was an official ISO standard for measurement points, but BOY are they specific! I encourage you to look through them if you are unsure about exactly where a point is. (For example, did you know that the waist point is ‘midway between the lowest rib point and the highest point of the hip bone at the side of the body’? I certainly didn’t!)
Wow! The 3dlook link is probably a bit more to the point, but I bet I could come up with an essential reason to know where to find the tragion, especially in these times of near universal mask-wearing.
Thanks for the links!