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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47
MapControl/Shared/MapProjection.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;
@ -19,21 +19,11 @@ namespace MapControl
/// </summary>
public abstract class MapProjection
{
public const double Wgs84EquatorialRadius = 6378137d;
public const double Wgs84Flattening = 1d / 298.257223563;
public static readonly double Wgs84Eccentricity = Math.Sqrt((2d - Wgs84Flattening) * Wgs84Flattening);
public const double MetersPerDegree = Wgs84EquatorialRadius * Math.PI / 180d;
public const int TileSize = 256;
public const double PixelPerDegree = TileSize / 360d;
/// <summary>
/// Gets the scaling factor from cartesian map coordinates in degrees to viewport coordinates for the specified zoom level.
/// </summary>
public static double DegreesToViewportScale(double zoomLevel)
{
return Math.Pow(2d, zoomLevel) * TileSize / 360d;
}
public const double Wgs84EquatorialRadius = 6378137d;
public const double MetersPerDegree = Wgs84EquatorialRadius * Math.PI / 180d;
/// <summary>
/// Gets or sets the WMS 1.3.0 CRS Identifier.
@ -41,9 +31,9 @@ namespace MapControl
public string CrsId { get; set; }
/// <summary>
/// Indicates if this is a web mercator projection, i.e. compatible with MapTileLayer.
/// Indicates if the map can be moved infinitely in longitudinal direction.
/// </summary>
public bool IsWebMercator { get; protected set; } = false;
public bool IsContinuous { get; protected set; } = true;
/// <summary>
/// Indicates if this is an azimuthal projection.
@ -51,33 +41,30 @@ namespace MapControl
public bool IsAzimuthal { get; protected set; } = false;
/// <summary>
/// Gets the scale factor from longitude to x values of a normal cylindrical projection.
/// Returns NaN if this is not a normal cylindrical projection.
/// Indicates if this is a web mercator projection, i.e. compatible with MapTileLayer.
/// </summary>
public double LongitudeScale { get; protected set; } = 1d;
public bool IsWebMercator { get; protected set; } = false;
/// <summary>
/// Gets the scale factor from geographic to cartesian coordinates, on the line of true scale
/// of a cylindrical projection, or at the projection center of an azimuthal projection.
/// </summary>
public double TrueScale { get; protected set; } = MetersPerDegree;
/// <summary>
/// Gets the absolute value of the minimum and maximum latitude that can be transformed.
/// </summary>
public double MaxLatitude { get; protected set; } = 90d;
/// <summary>
/// Gets the scaling factor from cartesian map coordinates to viewport coordinates.
/// </summary>
public double ViewportScale { get; protected set; }
/// <summary>
/// Gets the transformation from cartesian map coordinates to viewport coordinates (pixels).
/// </summary>
public MatrixTransform ViewportTransform { get; } = new MatrixTransform();
/// <summary>
/// Gets the scaling factor from cartesian map coordinates to viewport coordinates for the specified zoom level.
/// Gets the scaling factor from cartesian map coordinates to viewport coordinates.
/// </summary>
public virtual double GetViewportScale(double zoomLevel)
{
return DegreesToViewportScale(zoomLevel);
}
public double ViewportScale { get; protected set; }
/// <summary>
/// Gets the map scale at the specified Location as viewport coordinate units per meter (px/m).
@ -149,7 +136,7 @@ namespace MapControl
/// </summary>
public virtual void SetViewportTransform(Location projectionCenter, Location mapCenter, Point viewportCenter, double zoomLevel, double heading)
{
ViewportScale = GetViewportScale(zoomLevel);
ViewportScale = Math.Pow(2d, zoomLevel) * PixelPerDegree / TrueScale;
var center = LocationToPoint(mapCenter);