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Simplified MapProjection

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ClemensFischer 2024-09-08 14:03:55 +02:00
parent eb046d97ad
commit 03ac94a002
6 changed files with 76 additions and 82 deletions
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67
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 WPF
using System.Windows;
#endif
@ -67,70 +66,34 @@ namespace MapControl
/// </summary>
public virtual Rect? BoundingBoxToMap(BoundingBox boundingBox)
{
Rect? rect = null;
Rect? mapRect = null;
var southWest = LocationToMap(new Location(boundingBox.South, boundingBox.West));
var northEast = LocationToMap(new Location(boundingBox.North, boundingBox.East));
if (boundingBox.South < boundingBox.North && boundingBox.West < boundingBox.East)
if (southWest.HasValue && northEast.HasValue)
{
var p1 = LocationToMap(new Location(boundingBox.South, boundingBox.West));
var p2 = LocationToMap(new Location(boundingBox.North, boundingBox.East));
if (p1.HasValue && p2.HasValue)
{
rect = new Rect(p1.Value, p2.Value);
}
}
else if (boundingBox.Center != null)
{
// boundingBox is a CenteredBoundingBox
//
var center = LocationToMap(boundingBox.Center);
if (center.HasValue)
{
var width = boundingBox.Width * Wgs84MeterPerDegree;
var height = boundingBox.Height * Wgs84MeterPerDegree;
var x = center.Value.X - width / 2d;
var y = center.Value.Y - height / 2d;
rect = new Rect(x, y, width, height);
}
mapRect = new Rect(southWest.Value, northEast.Value);
}
return rect;
return mapRect;
}
/// <summary>
/// Transforms a Rect in projected map coordinates to a BoundingBox in geographic coordinates.
/// Returns null when the MapRect can not be transformed.
/// </summary>
public virtual BoundingBox MapToBoundingBox(Rect rect)
public virtual BoundingBox MapToBoundingBox(Rect mapRect)
{
var southWest = MapToLocation(new Point(rect.X, rect.Y));
var northEast = MapToLocation(new Point(rect.X + rect.Width, rect.Y + rect.Height));
BoundingBox boundingBox = null;
var southWest = MapToLocation(new Point(mapRect.X, mapRect.Y));
var northEast = MapToLocation(new Point(mapRect.X + mapRect.Width, mapRect.Y + mapRect.Height));
return southWest != null && northEast != null
? new BoundingBox(southWest, northEast)
: null;
}
if (southWest != null && northEast != null)
{
boundingBox = new BoundingBox(southWest, northEast);
}
/// <summary>
/// Gets the CRS parameter value for a WMS GetMap request.
/// </summary>
public virtual string GetCrsValue()
{
return CrsId.StartsWith("AUTO2:") || CrsId.StartsWith("AUTO:")
? string.Format(CultureInfo.InvariantCulture, "{0},1,{1},{2}", CrsId, Center.Longitude, Center.Latitude)
: CrsId;
}
/// <summary>
/// Gets the BBOX parameter value for a WMS GetMap request.
/// </summary>
public virtual string GetBboxValue(Rect rect)
{
return string.Format(CultureInfo.InvariantCulture,
"{0:F2},{1:F2},{2:F2},{3:F2}",
rect.X, rect.Y, rect.X + rect.Width, rect.Y + rect.Height);
return boundingBox;
}
}
}