/**
* Calculates velocity of two points using
* v = d/t
*/
public static double calculateVelocity(double distance,
Location l1, Location l2)
{
double velocity;
double realTime;
realTime = (double) (l2.Time - l1.Time) / SEG_TO_HR;
if (realTime == 0)
realTime = 1.0 / SEG_TO_HR;
velocity = distance / (double) realTime;
return velocity;
}
/**
* Calculates the distance between to given points, using the
* haversine formula for the Earth.
*/
public static double calculateDistance(Location l1, Location l2)
{
double haversine, distance;
double dLat, dLon;
dLat = (l2.Latitude - l1.Latitude) * DEG_RAD;
dLon = (l2.Longitude - l1.Longitude) * DEG_RAD;
haversine = Math.Sin(dLat * 0.5) * Math.Sin(dLat * 0.5) +
Math.Sin(dLon * 0.5) * Math.Sin(dLon * 0.5) *
Math.Cos(l2.Latitude * DEG_RAD) *
Math.Cos(l1.Latitude * DEG_RAD);
distance = 2 * Math.Atan2(Math.Sqrt(haversine),
Math.Sqrt(1 - haversine)) * R_EARTH;
return distance;
}
