ClemensFischer/XAML-Map-Control
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Version 4.17.0: Added support for WMTS

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ClemensF 2020-03-22 18:33:34 +01:00
parent 7e5c5c0671
commit b5fe760c83
7 changed files with 112 additions and 125 deletions
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73
MapControl/Shared/MapProjection.cs
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@ -6,6 +6,7 @@ using System;
using System.Globalization;
#if WINDOWS_UWP
using Windows.Foundation;
using Windows.UI.Xaml.Media;
#else
using System.Windows;
using System.Windows.Media;
@ -18,8 +19,6 @@ namespace MapControl
/// </summary>
public abstract class MapProjection
{
public const int TileSize = 256;
public const double Wgs84EquatorialRadius = 6378137d;
public const double Wgs84Flattening = 1d / 298.257223563;
public static readonly double Wgs84Eccentricity = Math.Sqrt((2d - Wgs84Flattening) * Wgs84Flattening);
@ -79,6 +78,11 @@ namespace MapControl
/// </summary>
public Matrix InverseViewportTransform { get; private set; }
/// <summary>
/// Gets the rotation angle of the ViewportTransform matrix.
/// </summary>
public double ViewportRotation { get; private set; }
/// <summary>
/// Gets the scaling factor from cartesian map coordinates to viewport coordinates
/// at the projection's point of true scale.
@ -178,19 +182,76 @@ namespace MapControl
}
/// <summary>
/// Sets ProjectionCenter, ViewportScale, ViewportTransform and InverseViewportTransform.
/// Sets ProjectionCenter, ViewportScale, ViewportRotation, ViewportTransform and InverseViewportTransform.
/// </summary>
public void SetViewportTransform(Location projectionCenter, Location mapCenter, Point viewportCenter, double zoomLevel, double heading)
public void SetViewportTransform(Location projectionCenter, Location mapCenter, Point viewportCenter, double zoomLevel, double rotation)
{
ProjectionCenter = projectionCenter;
ViewportScale = Math.Pow(2d, zoomLevel) * TileSize / (360d * TrueScale);
ViewportScale = Math.Pow(2d, zoomLevel) * 256d / (360d * TrueScale);
ViewportRotation = rotation;
var center = LocationToPoint(mapCenter);
var matrix = MatrixFactory.Create(center, ViewportScale, -ViewportScale, heading, viewportCenter);
var matrix = CreateViewportTransform(center, viewportCenter);
ViewportTransform = matrix;
matrix.Invert();
InverseViewportTransform = matrix;
}
internal Matrix CreateViewportTransform(Point mapCenter, Point viewportCenter)
{
var matrix = new Matrix(ViewportScale, 0d, 0d, -ViewportScale, -ViewportScale * mapCenter.X, ViewportScale * mapCenter.Y);
matrix.Rotate(ViewportRotation);
matrix.Translate(viewportCenter.X, viewportCenter.Y);
return matrix;
}
internal Matrix CreateTileLayerTransform(double tileGridScale, Point tileGridTopLeft, Point tileGridOrigin)
{
var scale = ViewportScale / tileGridScale;
var matrix = new Matrix(scale, 0d, 0d, scale, 0d, 0d);
matrix.Rotate(ViewportRotation);
// tile grid origin in map cordinates
//
var mapOrigin = new Point(
tileGridTopLeft.X + tileGridOrigin.X / tileGridScale,
tileGridTopLeft.Y - tileGridOrigin.Y / tileGridScale);
// tile grid origin in viewport cordinates
//
var viewOrigin = ViewportTransform.Transform(mapOrigin);
matrix.Translate(viewOrigin.X, viewOrigin.Y);
return matrix;
}
internal Rect GetTileBounds(double tileGridScale, Point tileGridTopLeft, Size viewportSize)
{
var scale = tileGridScale / ViewportScale;
var matrix = new Matrix(scale, 0d, 0d, scale, 0d, 0d);
matrix.Rotate(-ViewportRotation);
// viewport origin in map coordinates
//
var origin = InverseViewportTransform.Transform(new Point());
// translate origin to tile grid origin in pixels
//
matrix.Translate(
tileGridScale * (origin.X - tileGridTopLeft.X),
tileGridScale * (tileGridTopLeft.Y - origin.Y));
// transforms viewport bounds to tile pixel bounds
//
var transform = new MatrixTransform { Matrix = matrix };
return transform.TransformBounds(new Rect(0d, 0d, viewportSize.Width, viewportSize.Height));
}
}
}