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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28
MapControl/Shared/EquirectangularProjection.cs
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@ -14,7 +14,7 @@ namespace MapControl
{
/// <summary>
/// Equirectangular Projection.
/// Longitude and Latitude values are transformed identically to X and Y.
/// Longitude and Latitude values are transformed linearly to X and Y in meters.
/// </summary>
public class EquirectangularProjection : MapProjection
{
@ -23,33 +23,33 @@ namespace MapControl
CrsId = "EPSG:4326";
}
public override double TrueScale
{
get { return 1d; }
}
public override Vector GetMapScale(Location location)
public override Vector GetRelativeScale(Location location)
{
return new Vector(
ViewportScale / (Wgs84MetersPerDegree * Math.Cos(location.Latitude * Math.PI / 180d)),
ViewportScale / Wgs84MetersPerDegree);
1d / Math.Cos(location.Latitude * Math.PI / 180d),
1d);
}
public override Point LocationToPoint(Location location)
public override Point LocationToMap(Location location)
{
return new Point(location.Longitude, location.Latitude);
return new Point(
location.Longitude * UnitsPerDegree,
location.Latitude * UnitsPerDegree);
}
public override Location PointToLocation(Point point)
public override Location MapToLocation(Point point)
{
return new Location(point.Y, point.X);
return new Location(
point.Y / UnitsPerDegree,
point.X / UnitsPerDegree);
}
public override string GetBboxValue(Rect rect)
{
return string.Format(CultureInfo.InvariantCulture,
CrsId != "CRS:84" ? "{1},{0},{3},{2}" : "{0},{1},{2},{3}",
rect.X, rect.Y, (rect.X + rect.Width), (rect.Y + rect.Height));
rect.X / UnitsPerDegree, rect.Y / UnitsPerDegree,
(rect.X + rect.Width) / UnitsPerDegree, (rect.Y + rect.Height) / UnitsPerDegree);
}
}
}