Introduction to Quartz 2D for QuickDraw Programmers
Subject:   Size issues
Date:   2004-09-29 13:20:36
From:   easco
Response to: Size issues

It really depends on whose defintion of a typographic "point" you take. You can read one persons account on the subject at the link:

The history of the American POINT SYSTEM

According to that article, at least, the European standard for a "point" is 0.0148" which is slightly larger than 1/72 of an inch.

However the American Standard is listed as 0.0138" or 1/72.46 which is slightly smaller than the point you mention.

Nevertheless you are correct in your assesment. I was thinking of the 72.27 figure and got the magnitude wrong when dividing.

Perhaps the article would be more accurate to say that "Depending on the source, the definition of a typographic point can be slightly different from 1/72 of an inch but Quartz 2D adopts the PostScript convention which defines it to be exactly 1/72 of an inch". Which is really what's important to know in this context anyway.