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Use Matrix for projection relative scale

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ClemensFischer 2026-01-20 09:48:16 +01:00
parent 2c9e478095
commit ab155a26e7
21 changed files with 93 additions and 104 deletions
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8
MapControl/Shared/MapProjection.cs
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@ -1,6 +1,7 @@
using System;
#if WPF
using System.Windows;
using System.Windows.Media;
#elif AVALONIA
using Avalonia;
#endif
@ -82,9 +83,10 @@ namespace MapControl
}
/// <summary>
/// Gets the relative map scale at the specified geographic coordinates.
/// Gets the relative scale at the specified geographic coordinates.
/// The returned Matrix represents the local distortion of the map projection.
/// </summary>
public virtual Point RelativeScale(double latitude, double longitude) => new Point(1d, 1d);
public virtual Matrix RelativeScale(double latitude, double longitude) => new Matrix(1d, 0d, 0d, 1d, 0d, 0d);
/// <summary>
/// Transforms geographic coordinates to a Point in projected map coordinates.
@ -101,7 +103,7 @@ namespace MapControl
/// <summary>
/// Gets the relative map scale at the specified geographic Location.
/// </summary>
public Point RelativeScale(Location location) => RelativeScale(location.Latitude, location.Longitude);
public Matrix RelativeScale(Location location) => RelativeScale(location.Latitude, location.Longitude);
/// <summary>
/// Transforms a Location in geographic coordinates to a Point in projected map coordinates.