Area

The environment variable to get imperial units is SB_AREA_UNIT.

The format will be as follows 10FF, 12II, 5M i.e 10 square feet, 12 square inches and 5 miles. When presenting the area square feet is automatically chosen if the value is more than 1FF, and miles is automatically chosen if the area is less than 1II. Miles is a measure which represents the diameter, in thousands of an inch, of a circle. Miles will in practice only be used for cable cross section areas since all other areas are too large.