ClemensFischer/XAML-Map-Control
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Updated map projections

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ClemensFischer 2026-01-29 23:27:39 +01:00
parent d790200cf1
commit 359cbe8908
4 changed files with 84 additions and 52 deletions
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5
MapControl/Shared/PolarStereographicProjection.cs
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@ -69,12 +69,13 @@ namespace MapControl
x = sign * (x - FalseEasting);
y = sign * (y - FalseNorthing);
var e = Math.Sqrt((2d - Flattening) * Flattening);
var e2 = (2d - Flattening) * Flattening;
var e = Math.Sqrt(e2);
var r = Math.Sqrt(x * x + y * y); // p.162 (20-18)
var t = r * Math.Sqrt(Math.Pow(1d + e, 1d + e) * Math.Pow(1d - e, 1d - e))
/ (2d * EquatorialRadius * ScaleFactor); // p.162 (21-39)
var phi = WorldMercatorProjection.ApproximateLatitude(e, t); // p.162 (3-5)
var phi = WorldMercatorProjection.ApproximateLatitude(e2, t); // p.162 (3-5)
var lambda = Math.Atan2(x, -y); // p.162 (20-16)
return new Location(sign * phi * 180d / Math.PI, sign * lambda * 180d / Math.PI);