ClemensFischer/XAML-Map-Control
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Version 5.0: Separated map projection and view transform.

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ClemensF 2020-03-26 19:08:20 +01:00
parent 53723844a0
commit c7cb2efcdb
47 changed files with 401 additions and 382 deletions
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16
MapControl/Shared/GnomonicProjection.cs
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@ -19,37 +19,37 @@ namespace MapControl
CrsId = "AUTO2:97001"; // GeoServer non-standard CRS ID
}
public override Point LocationToPoint(Location location)
public override Point LocationToMap(Location location)
{
if (location.Equals(ProjectionCenter))
if (location.Equals(Center))
{
return new Point();
}
double azimuth, distance;
GetAzimuthDistance(ProjectionCenter, location, out azimuth, out distance);
GetAzimuthDistance(Center, location, out azimuth, out distance);
var mapDistance = distance < Math.PI / 2d
? Math.Tan(distance) * TrueScale * 180d / Math.PI
? Math.Tan(distance) * UnitsPerDegree * 180d / Math.PI
: double.PositiveInfinity;
return new Point(mapDistance * Math.Sin(azimuth), mapDistance * Math.Cos(azimuth));
}
public override Location PointToLocation(Point point)
public override Location MapToLocation(Point point)
{
if (point.X == 0d && point.Y == 0d)
{
return new Location(ProjectionCenter.Latitude, ProjectionCenter.Longitude);
return new Location(Center.Latitude, Center.Longitude);
}
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 / (TrueScale * 180d / Math.PI));
var distance = Math.Atan(mapDistance / (UnitsPerDegree * 180d / Math.PI));
return GetLocation(ProjectionCenter, azimuth, distance);
return GetLocation(Center, azimuth, distance);
}
}
}