I am going to guess they use some standard spheroid instead of the actual value. In 'Big Red' It lists the value as 6378388 meters, and says it is based on the "International Hayford Spheroid".
I am going to guess they use some standard spheroid instead of the actual value. In 'Big Red' It lists the value as 6378388 meters, and says it is based on the "International Hayford Spheroid".