| 437,6 → 437,7 |
|---|
| return dDistance; |
| } |
| |
| |
| public double GetDistanceInPixels(GPoint point1, GPoint point2) |
| { |
| double a = (double)(point2.X - point1.X); |
| 445,6 → 446,30 |
|---|
| return Math.Sqrt(a * a + b * b); |
| } |
| |
| /// <summary> |
| /// point from distance (in m) to point specified by latitude/longitude |
| /// without bearing (bearing = 0°) |
| /// for calculating radius of circle around a point |
| /// The Haversine formula, http://www.movable-type.co.uk/scripts/latlong.html |
| /// </summary> |
| /// <param name="p1"></param> |
| /// <param name="dDist"></param> |
| /// <returns></returns> |
| public static PointLatLng GetPointFromDistance(PointLatLng p1, double dDist) |
| { |
| double R = 6378137; |
| double dBearing = 0; |
| double dLat1InRad = p1.Lat * (Math.PI / 180); |
| double dLong1InRad = p1.Lng * (Math.PI / 180); |
| |
| double dLat2InRad = Math.Asin(Math.Sin(dLat1InRad) * Math.Cos(dDist / R) + Math.Cos(dLat1InRad) * Math.Sin(dDist / R)); |
| double dLong2InRad = dLong1InRad + Math.Atan2(Math.Sin(dBearing) * Math.Sin(dDist / R) * Math.Cos(dLat1InRad), Math.Cos(dDist / R) - Math.Sin(dLat1InRad) * Math.Sin(dLat2InRad)); |
| |
| double dLatitude = dLat2InRad / (Math.PI / 180); |
| double dLongitude = dLong2InRad / (Math.PI / 180); |
| |
| return new PointLatLng(dLatitude, dLongitude); |
| } |
| /// <summary> |
| /// Accepts two coordinates in degrees. |
| /// </summary> |