ClemensFischer/XAML-Map-Control
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Version 4.4.0: Fixed MapPolyline performance on UWP. Added MapPolygon and MapMultiPolygon for WPF.

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ClemensF 2018-02-09 17:43:47 +01:00
parent cce5d6e0b4
commit d1552506f6
80 changed files with 673 additions and 550 deletions
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34
MapControl/Shared/WebMercatorProjection.cs
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@ -1,5 +1,5 @@
// XAML Map Control - https://github.com/ClemensFischer/XAML-Map-Control
// © 2017 Clemens Fischer
// © 2018 Clemens Fischer
// Licensed under the Microsoft Public License (Ms-PL)
using System;
@ -13,7 +13,7 @@ namespace MapControl
{
/// <summary>
/// Transforms map coordinates according to the Web (or Pseudo) Mercator Projection, EPSG:3857.
/// Longitude values are transformed linearly to X values in meters, by multiplying with MetersPerDegree.
/// Longitude values are transformed linearly to X values in meters, by multiplying with TrueScale.
/// Latitude values in the interval [-MaxLatitude .. MaxLatitude] are transformed to Y values in meters
/// in the interval [-R*pi .. R*pi], R=Wgs84EquatorialRadius.
/// </summary>
@ -28,15 +28,9 @@ namespace MapControl
{
CrsId = crsId;
IsWebMercator = true;
LongitudeScale = MetersPerDegree;
MaxLatitude = YToLatitude(180d);
}
public override double GetViewportScale(double zoomLevel)
{
return DegreesToViewportScale(zoomLevel) / MetersPerDegree;
}
public override Point GetMapScale(Location location)
{
var scale = ViewportScale / Math.Cos(location.Latitude * Math.PI / 180d);
@ -47,20 +41,20 @@ namespace MapControl
public override Point LocationToPoint(Location location)
{
return new Point(
MetersPerDegree * location.Longitude,
MetersPerDegree * LatitudeToY(location.Latitude));
TrueScale * location.Longitude,
TrueScale * LatitudeToY(location.Latitude));
}
public override Location PointToLocation(Point point)
{
return new Location(
YToLatitude(point.Y / MetersPerDegree),
point.X / MetersPerDegree);
YToLatitude(point.Y / TrueScale),
point.X / TrueScale);
}
public override Location TranslateLocation(Location location, Point translation)
{
var scaleX = MetersPerDegree * ViewportScale;
var scaleX = TrueScale * ViewportScale;
var scaleY = scaleX / Math.Cos(location.Latitude * Math.PI / 180d);
return new Location(
@ -70,9 +64,17 @@ namespace MapControl
public static double LatitudeToY(double latitude)
{
return latitude <= -90d ? double.NegativeInfinity
: latitude >= 90d ? double.PositiveInfinity
: Math.Log(Math.Tan((latitude + 90d) * Math.PI / 360d)) / Math.PI * 180d;
if (latitude <= -90d)
{
return double.NegativeInfinity;
}
if (latitude >= 90d)
{
return double.PositiveInfinity;
}
return Math.Log(Math.Tan((latitude + 90d) * Math.PI / 360d)) / Math.PI * 180d;
}
public static double YToLatitude(double y)