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Added MapProjection.Type

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This commit is contained in:
Clemens 2022-03-05 18:40:57 +01:00
parent a07948be02
commit 16fb98ac86
15 changed files with 126 additions and 77 deletions
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2
MapControl/Shared/AutoEquirectangularProjection.cs
View file

@ -20,8 +20,8 @@ namespace MapControl
public AutoEquirectangularProjection()
{
Type = MapProjectionType.NormalCylindrical;
CrsId = DefaultCrsId;
IsNormalCylindrical = true;
}
public override Point LocationToMap(Location location)

5
MapControl/Shared/AzimuthalEquidistantProjection.cs
View file

@ -15,6 +15,11 @@ namespace MapControl
/// </summary>
public class AzimuthalEquidistantProjection : AzimuthalProjection
{
public AzimuthalEquidistantProjection(string crsId)
{
CrsId = crsId;
}
public override Point LocationToMap(Location location)
{
if (location.Equals(Center))

5
MapControl/Shared/AzimuthalProjection.cs
View file

@ -16,6 +16,11 @@ namespace MapControl
/// </summary>
public abstract class AzimuthalProjection : MapProjection
{
protected AzimuthalProjection()
{
Type = MapProjectionType.Azimuthal;
}
public override Rect BoundingBoxToRect(BoundingBox boundingBox)
{
var center = LocationToMap(boundingBox.Center);

2
MapControl/Shared/EquirectangularProjection.cs
View file

@ -23,8 +23,8 @@ namespace MapControl
public EquirectangularProjection()
{
Type = MapProjectionType.NormalCylindrical;
CrsId = DefaultCrsId;
IsNormalCylindrical = true;
}
public override Vector GetRelativeScale(Location location)

49
MapControl/Shared/MapBase.cs
View file

@ -44,7 +44,7 @@ namespace MapControl
public static readonly DependencyProperty MapProjectionProperty = DependencyProperty.Register(
nameof(MapProjection), typeof(MapProjection), typeof(MapBase),
new PropertyMetadata(new WebMercatorProjection(), (o, e) => ((MapBase)o).MapProjectionPropertyChanged()));
new PropertyMetadata(new WebMercatorProjection(), (o, e) => ((MapBase)o).MapProjectionPropertyChanged((MapProjection)e.NewValue)));
public static readonly DependencyProperty ProjectionCenterProperty = DependencyProperty.Register(
nameof(ProjectionCenter), typeof(Location), typeof(MapBase),
@ -72,6 +72,7 @@ namespace MapControl
private Location transformCenter;
private Point viewCenter;
private double centerLongitude;
private double maxLatitude = 90d;
private bool internalPropertyChange;
/// <summary>
@ -436,8 +437,23 @@ namespace MapControl
}
}
private void MapProjectionPropertyChanged()
private void MapProjectionPropertyChanged(MapProjection projection)
{
maxLatitude = 90d;
if (projection.Type <= MapProjectionType.NormalCylindrical)
{
var maxLocation = projection.MapToLocation(new Point(0d, 180d * MapProjection.Wgs84MeterPerDegree));
if (maxLocation != null && maxLocation.Latitude < 90d)
{
maxLatitude = maxLocation.Latitude;
var center = Center;
AdjustCenterProperty(CenterProperty, ref center);
}
}
ResetTransformCenter();
UpdateTransform(false, true);
}
@ -450,16 +466,23 @@ namespace MapControl
private void AdjustCenterProperty(DependencyProperty property, ref Location center)
{
if (center == null ||
center.Longitude < -180d || center.Longitude > 180d ||
center.Latitude < -MapProjection.MaxLatitude || center.Latitude > MapProjection.MaxLatitude)
{
center = (center == null)
? new Location()
: new Location(
Math.Min(Math.Max(center.Latitude, -MapProjection.MaxLatitude), MapProjection.MaxLatitude),
Location.NormalizeLongitude(center.Longitude));
var c = center;
if (center == null)
{
center = new Location();
}
else if (
center.Latitude < -maxLatitude || center.Latitude > maxLatitude ||
center.Longitude < -180d || center.Longitude > 180d)
{
center = new Location(
Math.Min(Math.Max(center.Latitude, -maxLatitude), maxLatitude),
Location.NormalizeLongitude(center.Longitude));
}
if (center != c)
{
SetValueInternal(property, center);
}
}
@ -727,9 +750,9 @@ namespace MapControl
{
center.Longitude = Location.NormalizeLongitude(center.Longitude);
if (center.Latitude < -projection.MaxLatitude || center.Latitude > projection.MaxLatitude)
if (center.Latitude < -maxLatitude || center.Latitude > maxLatitude)
{
center.Latitude = Math.Min(Math.Max(center.Latitude, -projection.MaxLatitude), projection.MaxLatitude);
center.Latitude = Math.Min(Math.Max(center.Latitude, -maxLatitude), maxLatitude);
resetTransformCenter = true;
}

4
MapControl/Shared/MapPanel.cs
View file

@ -118,7 +118,7 @@ namespace MapControl
var position = parentMap.LocationToView(location);
if (parentMap.MapProjection.IsNormalCylindrical && IsOutsideViewport(position))
if (parentMap.MapProjection.Type <= MapProjectionType.NormalCylindrical && IsOutsideViewport(position))
{
location = new Location(location.Latitude, parentMap.ConstrainedLongitude(location.Longitude));
@ -144,7 +144,7 @@ namespace MapControl
var center = new Point(rect.X + rect.Width / 2d, rect.Y + rect.Height / 2d);
var position = parentMap.ViewTransform.MapToView(center);
if (parentMap.MapProjection.IsNormalCylindrical && IsOutsideViewport(position))
if (parentMap.MapProjection.Type <= MapProjectionType.NormalCylindrical && IsOutsideViewport(position))
{
var location = parentMap.MapProjection.MapToLocation(center);
if (location != null)

2
MapControl/Shared/MapPath.cs
View file

@ -87,7 +87,7 @@ namespace MapControl
{
var longitudeOffset = 0d;
if (location != null && parentMap.MapProjection.IsNormalCylindrical)
if (location != null && parentMap.MapProjection.Type <= MapProjectionType.NormalCylindrical)
{
var pos = parentMap.LocationToView(location);

33
MapControl/Shared/MapProjection.cs
View file

@ -12,6 +12,15 @@ using System.Windows;
namespace MapControl
{
public enum MapProjectionType
{
WebMercator, // normal cylindrical projection compatible with MapTileLayer
NormalCylindrical,
TransverseCylindrical,
Azimuthal,
Other
}
/// <summary>
/// Defines a map projection between geographic coordinates and cartesian map coordinates.
/// </summary>
@ -25,30 +34,20 @@ namespace MapControl
public static MapProjectionFactory Factory { get; set; } = new MapProjectionFactory();
/// <summary>
/// Gets or sets the WMS 1.3.0 CRS identifier.
/// Gets the type of the projection.
/// </summary>
public string CrsId { get; set; } = string.Empty;
public MapProjectionType Type { get; protected set; } = MapProjectionType.Other;
/// <summary>
/// Gets the WMS 1.3.0 CRS identifier.
/// </summary>
public string CrsId { get; protected set; } = string.Empty;
/// <summary>
/// Gets or sets the projection center.
/// </summary>
public Location Center { get; set; } = new Location();
/// <summary>
/// Indicates if this is a normal cylindrical projection.
/// </summary>
public bool IsNormalCylindrical { get; protected set; }
/// <summary>
/// Indicates if this is a web mercator projection, i.e. compatible with MapTileLayer.
/// </summary>
public bool IsWebMercator { get; protected set; }
/// <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 relative map scale at the specified Location.
/// </summary>

2
MapControl/Shared/MapProjectionFactory.cs
View file

@ -41,7 +41,7 @@ namespace MapControl
break;
case "EPSG:97003": // proprietary CRS ID
projection = new AzimuthalEquidistantProjection { CrsId = crsId };
projection = new AzimuthalEquidistantProjection(crsId);
break;
default:

2
MapControl/Shared/MapTileLayer.cs
View file

@ -120,7 +120,7 @@ namespace MapControl
{
var update = false;
if (ParentMap == null || !ParentMap.MapProjection.IsWebMercator)
if (ParentMap == null || ParentMap.MapProjection.Type != MapProjectionType.WebMercator)
{
update = TileMatrix != null;
TileMatrix = null;

4
MapControl/Shared/WebMercatorProjection.cs
View file

@ -19,10 +19,8 @@ namespace MapControl
public WebMercatorProjection()
{
Type = MapProjectionType.WebMercator;
CrsId = DefaultCrsId;
IsNormalCylindrical = true;
IsWebMercator = true;
MaxLatitude = YToLatitude(180d);
}
public override Vector GetRelativeScale(Location location)

3
MapControl/Shared/WorldMercatorProjection.cs
View file

@ -22,9 +22,8 @@ namespace MapControl
public WorldMercatorProjection()
{
Type = MapProjectionType.NormalCylindrical;
CrsId = DefaultCrsId;
IsNormalCylindrical = true;
MaxLatitude = YToLatitude(180d);
}
public override Vector GetRelativeScale(Location location)