ClemensFischer/XAML-Map-Control
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General map graticule for WPF

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This commit is contained in:
Clemens 2022-03-04 22:28:18 +01:00
parent c998f19fe5
commit a07948be02
11 changed files with 414 additions and 122 deletions
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7
MapControl/Shared/OrthographicProjection.cs
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@ -33,6 +33,11 @@ namespace MapControl
var lat = location.Latitude * Math.PI / 180d;
var dLon = (location.Longitude - Center.Longitude) * Math.PI / 180d;
if (Math.Abs(lat - lat0) > Math.PI / 2d || Math.Abs(dLon) > Math.PI / 2d)
{
return new Point(double.NaN, double.NaN);
}
return new Point(
Wgs84EquatorialRadius * Math.Cos(lat) * Math.Sin(dLon),
Wgs84EquatorialRadius * (Math.Cos(lat0) * Math.Sin(lat) - Math.Sin(lat0) * Math.Cos(lat) * Math.Cos(dLon)));
@ -51,7 +56,7 @@ namespace MapControl
if (r2 > 1d)
{
return new Location(double.NaN, double.NaN);
return null;
}
var r = Math.Sqrt(r2);