Function haversine_distance 

pub fn haversine_distance<P: GetXY, Q: GetXY>(a: &P, b: &Q) -> f64

Assuming two points are on the surface of the earth as Lon-Lat coordinates, find the distance between them using the haversine formula. Returns the distance in degrees.

Parameters

Both points require the GetXY trait to be implemented

• a: The first point
• b: The second point

Returns

• f64: The distance between the two points