ClemensFischer/XAML-Map-Control
1
0
Fork 0
mirror of https://github.com/ClemensFischer/XAML-Map-Control.git synced 2026-04-08 16:05:50 +00:00
Code Issues Projects Releases Packages Wiki Activity

Updated map projections

Browse source
This commit is contained in:
ClemensFischer 2026-02-04 16:53:15 +01:00
parent 53b82eadb6
commit cf3401d519
4 changed files with 22 additions and 51 deletions
Download patch file Download diff file Expand all files Collapse all files

21
MapControl/Shared/TransverseMercatorProjection.cs
View file

@ -29,17 +29,10 @@ namespace MapControl
private readonly double d3; // δ3
private readonly double A;
public TransverseMercatorProjection(
double equatorialRadius, double flattening,
double scaleFactor, double centralMeridian,
double falseEasting, double falseNorthing = 0d)
protected TransverseMercatorProjection(double equatorialRadius, double flattening)
{
EquatorialRadius = equatorialRadius;
Flattening = flattening;
ScaleFactor = scaleFactor;
CentralMeridian = centralMeridian;
FalseEasting = falseEasting;
FalseNorthing = falseNorthing;
n = flattening / (2d - flattening);
m = 2d * Math.Sqrt(n) / (1d + n);
@ -58,12 +51,14 @@ namespace MapControl
A = equatorialRadius / (1d + n) * (1d + n2 / 4d + n2 * n2 / 64d);
}
public TransverseMercatorProjection(
double equatorialRadius, double flattening,
double scaleFactor, int utmZone, bool north = true)
: this(equatorialRadius, flattening,
scaleFactor, utmZone * 6d - 183d, 5e5, north ? 0d : 1e7)
public TransverseMercatorProjection(string crsId, double equatorialRadius, double flattening, int utmZone, bool north = true)
: this(equatorialRadius, flattening)
{
CrsId = crsId;
ScaleFactor = 0.9996;
CentralMeridian = utmZone * 6d - 183d;
FalseEasting = 5e5;
FalseNorthing = north ? 0d : 1e7;
}
public override double GridConvergence(double latitude, double longitude)