ClemensFischer/XAML-Map-Control
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Version 4.12. Revised projections

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ClemensF 2018-12-20 21:55:12 +01:00
parent 8cafe207cb
commit 90aa92def0
25 changed files with 390 additions and 167 deletions
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6
MapControl/Shared/GnomonicProjection.cs
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@ -10,7 +10,7 @@ using System.Windows;
namespace MapControl
{
/// <summary>
/// Transforms map coordinates according to the Gnomonic Projection.
/// Spherical Gnomonic Projection.
/// </summary>
public class GnomonicProjection : AzimuthalProjection
{
@ -36,7 +36,7 @@ namespace MapControl
GetAzimuthDistance(ProjectionCenter, location, out azimuth, out distance);
var mapDistance = distance < Math.PI / 2d
? Wgs84EquatorialRadius * Math.Tan(distance)
? Math.Tan(distance) * TrueScale * 180d / Math.PI
: double.PositiveInfinity;
return new Point(mapDistance * Math.Sin(azimuth), mapDistance * Math.Cos(azimuth));
@ -51,7 +51,7 @@ namespace MapControl
var azimuth = Math.Atan2(point.X, point.Y);
var mapDistance = Math.Sqrt(point.X * point.X + point.Y * point.Y);
var distance = Math.Atan(mapDistance / Wgs84EquatorialRadius);
var distance = Math.Atan(mapDistance / (TrueScale * 180d / Math.PI));
return GetLocation(ProjectionCenter, azimuth, distance);
}