| private static LatitudeAtLongitude ( MapPoint p1, MapPoint p2, double lon ) : double | ||
| p1 | MapPoint | |
| p2 | MapPoint | |
| lon | double | |
| return | double | |
private static double LatitudeAtLongitude(MapPoint p1, MapPoint p2, double lon)
{
double lon1 = p1.X / 180 * Math.PI;
double lon2 = p2.X / 180 * Math.PI;
double lat1 = p1.Y / 180 * Math.PI;
double lat2 = p2.Y / 180 * Math.PI;
lon = lon / 180 * Math.PI;
return Math.Atan((Math.Sin(lat1) * Math.Cos(lat2) * Math.Sin(lon - lon2)
- Math.Sin(lat2) * Math.Cos(lat1) * Math.Sin(lon - lon1)) / (Math.Cos(lat1) * Math.Cos(lat2) * Math.Sin(lon1 - lon2)))
/ Math.PI * 180;
}