ClemensFischer/XAML-Map-Control
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Use mean radius in distance calculations

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ClemensFischer 2026-01-09 08:13:07 +01:00
parent c187f323a8
commit 23a8e49efb
8 changed files with 20 additions and 14 deletions
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4
MapControl/Shared/StereographicProjection.cs
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@ -36,7 +36,7 @@ namespace MapControl
Center.GetAzimuthDistance(latitude, longitude, out double azimuth, out double distance);
var mapDistance = Math.Tan(distance / 2d) * 2d * Wgs84EquatorialRadius;
var mapDistance = Math.Tan(distance / 2d) * 2d * Wgs84MeanRadius;
return new Point(mapDistance * Math.Sin(azimuth), mapDistance * Math.Cos(azimuth));
}
@ -50,7 +50,7 @@ namespace MapControl
var azimuth = Math.Atan2(x, y);
var mapDistance = Math.Sqrt(x * x + y * y);
var distance = 2d * Math.Atan(mapDistance / (2d * Wgs84EquatorialRadius));
var distance = 2d * Math.Atan(mapDistance / (2d * Wgs84MeanRadius));
return Center.GetLocation(azimuth, distance);
}