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Rotated relative scale in MapProjections

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ClemensFischer 2026-01-20 15:48:30 +01:00
parent 25d4e13c16
commit 3fbfb0d5c1
8 changed files with 85 additions and 41 deletions
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10
MapControl/Shared/StereographicProjection.cs
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@ -28,18 +28,18 @@ namespace MapControl
public override Matrix RelativeScale(double latitude, double longitude)
{
(var cosC, var _, var _) = GetPointValues(latitude, longitude);
var k = 2d / (1d + cosC); // p.157 (21-4), k0 == 1
var p = GetProjectedPoint(latitude, longitude);
var k = 2d / (1d + p.CosC); // p.157 (21-4), k0 == 1
return new Matrix(k, 0d, 0d, k, 0d, 0d);
}
public override Point? LocationToMap(double latitude, double longitude)
{
(var cosC, var x, var y) = GetPointValues(latitude, longitude);
var k = 2d / (1d + cosC); // p.157 (21-4), k0 == 1
var p = GetProjectedPoint(latitude, longitude);
var k = 2d / (1d + p.CosC); // p.157 (21-4), k0 == 1
return new Point(EarthRadius * k * x, EarthRadius * k * y); // p.157 (21-2/3)
return new Point(EarthRadius * k * p.X, EarthRadius * k * p.Y); // p.157 (21-2/3)
}
public override Location MapToLocation(double x, double y)