public static GeoLocation CalcDestination(GeoLocation origin, double bearing, double distance)
{
double radius = 6371.0;
origin = WorldUtils.ToRadianLocation(origin);
bearing = WorldUtils.ToRadians(bearing);
distance = distance / radius;
double lat = Math.Asin(Math.Sin(origin.Lat) * Math.Cos(distance) +
Math.Cos(origin.Lat) * Math.Sin(distance) * Math.Cos(bearing));
double x = Math.Sin(bearing) * Math.Sin(distance) * Math.Cos(origin.Lat);
double y = Math.Cos(distance) - Math.Sin(origin.Lat) * Math.Sin(origin.Lat);
double lon = origin.Lon + Math.Atan2(x, y);
// normalize lon to coordinate between -180º and +180º
lon = (lon + 3 * Math.PI) % (2 * Math.PI) - Math.PI;
lon = WorldUtils.ToDegrees(lon);
lat = WorldUtils.ToDegrees(lat);
return(new GeoLocation()
{
Lat = lat, Lon = lon
});
}
public static GeoLocation ToRadianLocation(GeoLocation geoPoint)
{
double x = WorldUtils.ToRadians(geoPoint.Lon);
double y = WorldUtils.ToRadians(geoPoint.Lat);
return(new GeoLocation()
{
Lon = x, Lat = y
});
}