ClemensFischer/XAML-Map-Control
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Reworked MapProjection

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Return nullable Point from LocationToMap. Use MapRect instead of WinUI/UWP Rect replacement. Drop Vector. Add Scale struct.
This commit is contained in:
ClemensFischer 2022-12-02 16:50:10 +01:00
parent bab1788334
commit 218a85316c
28 changed files with 249 additions and 324 deletions
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6
MapControl/Shared/WorldMercatorProjection.cs
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@ -26,16 +26,16 @@ namespace MapControl
CrsId = DefaultCrsId;
}
public override Vector GetRelativeScale(Location location)
public override Scale GetRelativeScale(Location location)
{
var lat = location.Latitude * Math.PI / 180d;
var eSinLat = Wgs84Eccentricity * Math.Sin(lat);
var k = Math.Sqrt(1d - eSinLat * eSinLat) / Math.Cos(lat); // p.44 (7-8)
return new Vector(k, k);
return new Scale(k, k);
}
public override Point LocationToMap(Location location)
public override Point? LocationToMap(Location location)
{
return new Point(
Wgs84MeterPerDegree * location.Longitude,