havDistance static method

double havDistance(
  1. double lat1,
  2. double lat2,
  3. double dLng
)

Returns hav() of distance from (lat1, lng1) to (lat2, lng2) on the unit sphere, where dLng = lng1 − lng2.

Implementation

static double havDistance(double lat1, double lat2, double dLng) =>
    hav(lat1 - lat2) + hav(dLng) * cos(lat1) * cos(lat2);