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Update TransverseMercatorProjection.cs

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ClemensFischer 2026-01-23 22:00:50 +01:00
parent 3d000ce54b
commit edf92c3363
1 changed files with 4 additions and 2 deletions
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MapControl/Shared/TransverseMercatorProjection.cs
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@ -11,6 +11,8 @@ namespace MapControl
/// Transverse Mercator Projection.
/// See https://en.wikipedia.org/wiki/Transverse_Mercator_projection
/// and https://en.wikipedia.org/wiki/Universal_Transverse_Mercator_coordinate_system.
/// Formulas from "Concise Derivation of Extensive Coordinate Conversion Formulae
/// in the Gauss-Krüger Projection", http://www.gsi.go.jp/common/000065826.pdf.
/// </summary>
public class TransverseMercatorProjection : MapProjection
{
@ -76,12 +78,12 @@ namespace MapControl
var eta_ = Atanh(Math.Sin(dLambda) / Math.Sqrt(1d + t * t));
// k0 * A
var k0A = ScaleFactor * EquatorialRadius * f1;
// E
var x = FalseEasting + k0A * (eta_ +
a1 * Math.Cos(2d * xi_) * Math.Sinh(2d * eta_) +
a2 * Math.Cos(4d * xi_) * Math.Sinh(4d * eta_) +
a3 * Math.Cos(6d * xi_) * Math.Sinh(6d * eta_));
// N
var y = FalseNorthing + k0A * (xi_ +
a1 * Math.Sin(2d * xi_) * Math.Cosh(2d * eta_) +
a2 * Math.Sin(4d * xi_) * Math.Cosh(4d * eta_) +