👉 Haversine, also known as Haversian Radius or Haversian Distance, is a metric used to calculate the distance between two points on a sphere. It was developed by Sir Isaac Newton and is named after the Greek mathematician Proclus. The Haversine formula is derived from the law of sines for spherical geometry. The formula involves the distance d between two points (represented as R in this context) and the radius r of the sphere. The formula can be expressed using trig