From edf92c33638305d4eaf0cb98623452798fb8ea1a Mon Sep 17 00:00:00 2001 From: ClemensFischer Date: Fri, 23 Jan 2026 22:00:50 +0100 Subject: [PATCH] Update TransverseMercatorProjection.cs --- MapControl/Shared/TransverseMercatorProjection.cs | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/MapControl/Shared/TransverseMercatorProjection.cs b/MapControl/Shared/TransverseMercatorProjection.cs index d2bf8241..01e92aa7 100644 --- a/MapControl/Shared/TransverseMercatorProjection.cs +++ b/MapControl/Shared/TransverseMercatorProjection.cs @@ -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. /// 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_) +