public async Task <double> GetDistanceAsync(GeoPositions from, GeoPositions to)
{
if (from.Longitude >= -180 && to.Longitude <= 180 && from.Latitude >= -90 && to.Latitude <= 90)
{
const double earthRadius = 6371;
double d;
try
{
var φ1 = to.Latitude * Math.PI / 180;
var φ2 = from.Latitude * Math.PI / 180;
var Δλ = (to.Longitude - from.Longitude) * Math.PI / 180;
d = await Task.Run(() => Math.Acos(Math.Sin(φ1) * Math.Sin(φ2) + Math.Cos(φ1) * Math.Cos(φ2) * Math.Cos(Δλ)));
}
catch (Exception e)
{
//Logging the Exception here;
throw;
}
return(earthRadius * d);
}
return(double.MinValue);
}
public static bool IsEqual(this GeoPositions to, GeoPositions from)
{
return(to.Latitude.Equals(from.Latitude) && to.Longitude.Equals(from.Longitude));
}