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Updated PolarStereographicProjection

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ClemensFischer 2026-01-18 21:03:25 +01:00
parent 31b38d5049
commit 19cba8978b
3 changed files with 13 additions and 19 deletions
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16
MapControl/Shared/Location.cs
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@ -112,24 +112,16 @@ namespace MapControl
{
var lat1 = Latitude * Math.PI / 180d;
var lon1 = Longitude * Math.PI / 180d;
var cosD = Math.Cos(distance);
var sinD = Math.Sin(distance);
var cosA = Math.Cos(azimuth);
var sinA = Math.Sin(azimuth);
var cosLat1 = Math.Cos(lat1);
var sinLat1 = Math.Sin(lat1);
var cosA = Math.Cos(azimuth);
var sinA = Math.Sin(azimuth);
var cosD = Math.Cos(distance);
var sinD = Math.Sin(distance);
var lat2 = Math.Asin(sinLat1 * cosD + cosLat1 * sinD * cosA);
var lon2 = lon1 + Math.Atan2(sinD * sinA, cosLat1 * cosD - sinLat1 * sinD * cosA);
return new Location(lat2 * 180d / Math.PI, lon2 * 180d / Math.PI);
}
/// <summary>
/// Calculates the Location on a great circle at the specified azimuth in degrees and distance in meters from this Location.
/// </summary>
public Location GetLocation(double azimuth, double distance, double earthRadius = MapProjection.Wgs84MeanRadius)
{
return GetLocation(azimuth * Math.PI / 180d, distance / earthRadius);
}
}
}