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Add map projections

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Add TransverseMercatorProjection, PolarStereographicProjection and derived UTM/UPS projections to the base library.
This commit is contained in:
ClemensFischer 2022-12-13 18:22:18 +01:00
parent 568f55feb0
commit e45180b26a
18 changed files with 647 additions and 332 deletions
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60
MapProjections/Shared/GeoApiProjection.cs
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@ -9,11 +9,7 @@ using ProjNet.CoordinateSystems;
using ProjNet.CoordinateSystems.Transformations;
using System;
using System.Globalization;
#if WINUI
using Windows.Foundation;
#elif UWP
using Windows.Foundation;
#else
#if !WINUI && !UWP
using System.Windows;
#endif
@ -24,9 +20,7 @@ namespace MapControl.Projections
/// </summary>
public class GeoApiProjection : MapProjection
{
private ICoordinateSystem coordinateSystem;
private double scaleFactor;
private string bboxFormat;
private IProjectedCoordinateSystem coordinateSystem;
protected GeoApiProjection()
{
@ -45,13 +39,13 @@ namespace MapControl.Projections
public string CoordinateSystemWkt
{
get => CoordinateSystem?.WKT;
protected set => CoordinateSystem = new CoordinateSystemFactory().CreateFromWkt(value);
protected set => CoordinateSystem = new CoordinateSystemFactory().CreateFromWkt(value) as IProjectedCoordinateSystem;
}
/// <summary>
/// Gets or sets the ICoordinateSystem of the MapProjection.
/// </summary>
public ICoordinateSystem CoordinateSystem
public IProjectedCoordinateSystem CoordinateSystem
{
get => coordinateSystem;
protected set
@ -72,42 +66,31 @@ namespace MapControl.Projections
? string.Format("{0}:{1}", coordinateSystem.Authority, coordinateSystem.AuthorityCode)
: "";
var projection = (coordinateSystem as IProjectedCoordinateSystem)?.Projection;
if (projection != null)
if (CrsId == "EPSG:3857")
{
Type = MapProjectionType.WebMercator;
}
else
{
var projection = coordinateSystem.Projection
?? throw new ArgumentException("CoordinateSystem.Projection must not be null.", nameof(value));
var centralMeridian = projection.GetParameter("central_meridian") ?? projection.GetParameter("longitude_of_origin");
var centralParallel = projection.GetParameter("central_parallel") ?? projection.GetParameter("latitude_of_origin");
var falseEasting = projection.GetParameter("false_easting");
var falseNorthing = projection.GetParameter("false_northing");
if (CrsId == "EPSG:3857")
{
Type = MapProjectionType.WebMercator;
}
else if (
(centralMeridian == null || centralMeridian.Value == 0d) &&
if ((centralMeridian == null || centralMeridian.Value == 0d) &&
(centralParallel == null || centralParallel.Value == 0d) &&
(falseEasting == null || falseEasting.Value == 0d) &&
(falseNorthing == null || falseNorthing.Value == 0d))
{
Type = MapProjectionType.NormalCylindrical;
}
else if (
projection.Name.StartsWith("UTM") ||
projection.Name.StartsWith("Transverse"))
else if (projection.Name.StartsWith("UTM") || projection.Name.StartsWith("Transverse"))
{
Type = MapProjectionType.TransverseCylindrical;
}
scaleFactor = 1d;
bboxFormat = "{0},{1},{2},{3}";
}
else
{
Type = MapProjectionType.NormalCylindrical;
scaleFactor = Wgs84MeterPerDegree;
bboxFormat = "{1},{0},{3},{2}";
}
}
}
@ -123,15 +106,14 @@ namespace MapControl.Projections
throw new InvalidOperationException("The CoordinateSystem property is not set.");
}
var coordinate = LocationToMapTransform.Transform(
new Coordinate(location.Longitude, location.Latitude));
var coordinate = LocationToMapTransform.Transform(new Coordinate(location.Longitude, location.Latitude));
if (coordinate == null)
{
return null;
}
return new Point(coordinate.X * scaleFactor, coordinate.Y * scaleFactor);
return new Point(coordinate.X, coordinate.Y);
}
public override Location MapToLocation(Point point)
@ -141,19 +123,15 @@ namespace MapControl.Projections
throw new InvalidOperationException("The CoordinateSystem property is not set.");
}
var coordinate = MapToLocationTransform.Transform(
new Coordinate(point.X / scaleFactor, point.Y / scaleFactor));
var coordinate = MapToLocationTransform.Transform(new Coordinate(point.X, point.Y));
return new Location(coordinate.Y, coordinate.X);
}
public override string GetBboxValue(MapRect rect)
{
return string.Format(CultureInfo.InvariantCulture, bboxFormat,
rect.XMin / scaleFactor,
rect.YMin / scaleFactor,
rect.XMax / scaleFactor,
rect.YMax / scaleFactor);
return string.Format(CultureInfo.InvariantCulture,
"{0},{1},{2},{3}", rect.XMin, rect.YMin, rect.XMax, rect.YMax);
}
}
}