ClemensFischer/XAML-Map-Control
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Version 4.12.1 Added AutoEquirectangularProjection

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ClemensF 2019-04-05 19:13:58 +02:00
parent 0a3ae81117
commit bd9a16e921
17 changed files with 174 additions and 140 deletions
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36
MapControl/Shared/MapProjection.cs
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@ -3,7 +3,6 @@
// Licensed under the Microsoft Public License (Ms-PL)
using System;
using System.Globalization;
#if WINDOWS_UWP
using Windows.Foundation;
using Windows.UI.Xaml.Media;
@ -26,7 +25,7 @@ namespace MapControl
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 double Wgs84MetersPerDegree = Wgs84EquatorialRadius * Math.PI / 180d;
/// <summary>
/// Gets or sets the WMS 1.3.0 CRS Identifier.
@ -47,13 +46,18 @@ namespace MapControl
/// Gets the scale factor from geographic to cartesian coordinates, on the line of true scale of a
/// cylindrical projection (usually the equator), or at the projection center of an azimuthal projection.
/// </summary>
public double TrueScale { get; protected set; } = MetersPerDegree;
public double TrueScale { get; protected set; } = Wgs84MetersPerDegree;
/// <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 projection center. Only relevant for azimuthal pprojections.
/// </summary>
public Location ProjectionCenter { get; private set; } = new Location();
/// <summary>
/// Gets the transform matrix from cartesian map coordinates to viewport coordinates (pixels).
/// </summary>
@ -136,10 +140,11 @@ namespace MapControl
}
/// <summary>
/// Sets ViewportScale and ViewportTransform values.
/// Sets ProjectionCenter, ViewportScale, ViewportTransform and InverseViewportTransform.
/// </summary>
public virtual void SetViewportTransform(Location projectionCenter, Location mapCenter, Point viewportCenter, double zoomLevel, double heading)
public void SetViewportTransform(Location projectionCenter, Location mapCenter, Point viewportCenter, double zoomLevel, double heading)
{
ProjectionCenter = projectionCenter;
ViewportScale = Math.Pow(2d, zoomLevel) * PixelPerDegree / TrueScale;
var center = LocationToPoint(mapCenter);
@ -150,27 +155,6 @@ namespace MapControl
InverseViewportTransform = matrix;
}
/// <summary>
/// Gets a WMS query parameter string from the specified bounding box, e.g. "CRS=...&BBOX=...&WIDTH=...&HEIGHT=..."
/// </summary>
public virtual string WmsQueryParameters(BoundingBox boundingBox)
{
if (string.IsNullOrEmpty(CrsId))
{
return null;
}
var format = CrsId == "EPSG:4326"
? "CRS={0}&BBOX={2},{1},{4},{3}&WIDTH={5}&HEIGHT={6}"
: "CRS={0}&BBOX={1},{2},{3},{4}&WIDTH={5}&HEIGHT={6}";
var rect = BoundingBoxToRect(boundingBox);
var width = (int)Math.Round(ViewportScale * rect.Width);
var height = (int)Math.Round(ViewportScale * rect.Height);
return string.Format(CultureInfo.InvariantCulture, format, CrsId,
rect.X, rect.Y, (rect.X + rect.Width), (rect.Y + rect.Height), width, height);
}
internal static Matrix CreateTransformMatrix(
Point translation1, double scale, double rotation, Point translation2)
{