somehow i dont get it,
whats the difference if i measure it this way or that way, the distance is the same, and obviously the units (like with PP`s american football example) were made to accomodate those units in an understandable way, because in soccer for example a penalty is from 11 meters and not from 12.0297463 yards...
to sum it up, blame someone else and not the romans because they used neither yards nor meters...
cheers
viggen