// ==================================================
// Internal
private void Init(double lat, double lon, double?elevation, DateTime?timestamp, GeoDirection direction)
{
Latitude = lat;
Longitude = lon;
Elevation = elevation;
Timestamp = timestamp;
Direction = direction;
}
public static double DistanceMeters(IGeoLatLon a, IGeoLatLon b)
{
var r1 = GeoDirection.DegreesInRadians(a.Latitude);
var r2 = GeoDirection.DegreesInRadians(b.Latitude);
var rLat = GeoDirection.DegreesInRadians(b.Latitude - a.Latitude);
var rLon = GeoDirection.DegreesInRadians(b.Longitude - a.Longitude);
var c1 = Math.Sin(rLat / 2) * Math.Sin(rLat / 2) + Math.Cos(r1) * Math.Cos(r2) * Math.Sin(rLon / 2) * Math.Sin(rLon / 2);
return(Math.Atan2(Math.Sqrt(c1), Math.Sqrt(1 - c1)) * 2.0 * _earthRadiusMeter);
}
public GeoPosition(decimal lat, decimal lon, decimal?elevation = null, DateTime?timestamp = null, GeoDirection direction = null)
{
Init(Convert.ToDouble(lat), Convert.ToDouble(lon), Convert.ToDouble(elevation), timestamp, direction);
}
// ==================================================
// Constructors
public GeoPosition(double lat, double lon, double?elevation = null, DateTime?timestamp = null, GeoDirection direction = null)
{
Init(lat, lon, elevation, timestamp, direction);
}
