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Updated MapProjection and MapGraticule

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ClemensFischer 2026-02-01 01:42:24 +01:00
parent 2a45c1165c
commit cfed3575ac
16 changed files with 392 additions and 355 deletions
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17
MapProjections/Shared/ProjNetMapProjection.cs
View file

@ -52,10 +52,13 @@ namespace MapControl.Projections
var projection = field.Projection ??
throw new ArgumentException("CoordinateSystem.Projection must not be null.", nameof(value));
IsNormalCylindrical = projection.Name.StartsWith("Mercator") || projection.Name.Contains("Pseudo-Mercator");
var ellipsoid = field.GeographicCoordinateSystem.HorizontalDatum.Ellipsoid;
var transformFactory = new CoordinateTransformationFactory();
CrsId = !string.IsNullOrEmpty(field.Authority) && field.AuthorityCode > 0
? $"{field.Authority}:{field.AuthorityCode}"
: string.Empty;
LocationToMapTransform = transformFactory
.CreateFromCoordinateSystems(GeographicCoordinateSystem.WGS84, field)
.MathTransform;
@ -64,14 +67,9 @@ namespace MapControl.Projections
.CreateFromCoordinateSystems(field, GeographicCoordinateSystem.WGS84)
.MathTransform;
CrsId = !string.IsNullOrEmpty(field.Authority) && field.AuthorityCode > 0
? $"{field.Authority}:{field.AuthorityCode}"
: string.Empty;
var ellipsoid = field.GeographicCoordinateSystem.HorizontalDatum.Ellipsoid;
if (projection.Name.Contains("Pseudo-Mercator"))
{
IsNormalCylindrical = true;
FallbackProjection = new MapControl.WebMercatorProjection
{
EquatorialRadius = ellipsoid.SemiMajorAxis
@ -79,6 +77,7 @@ namespace MapControl.Projections
}
else if (projection.Name.StartsWith("Mercator"))
{
IsNormalCylindrical = true;
FallbackProjection = new MapControl.WorldMercatorProjection
{
EquatorialRadius = ellipsoid.SemiMajorAxis,
@ -106,7 +105,7 @@ namespace MapControl.Projections
ScaleFactor = projection.GetParameter("scale_factor").Value,
FalseEasting = projection.GetParameter("false_easting").Value,
FalseNorthing = projection.GetParameter("false_northing").Value,
Hemisphere = projection.GetParameter("latitude_of_origin").Value >= 0 ? Hemisphere.North : Hemisphere.South
LatitudeOfOrigin = projection.GetParameter("latitude_of_origin").Value
};
}
}

8
MapProjections/Shared/ProjNetMapProjectionFactory.cs
View file

@ -24,7 +24,7 @@ namespace MapControl.Projections
{ 29193, WktConstants.ProjCsSad69Utm23S },
};
public override MapProjection GetProjection(string crsId)
protected override MapProjection CreateProjection(string crsId)
{
return crsId switch
{
@ -32,11 +32,11 @@ namespace MapControl.Projections
MapControl.WorldMercatorProjection.DefaultCrsId => new WorldMercatorProjection(),
MapControl.Wgs84UpsNorthProjection.DefaultCrsId => new Wgs84UpsNorthProjection(),
MapControl.Wgs84UpsSouthProjection.DefaultCrsId => new Wgs84UpsSouthProjection(),
_ => GetProjectionFromEpsgCode(crsId) ?? base.GetProjection(crsId)
_ => base.CreateProjection(crsId)
};
}
public override MapProjection GetProjection(int epsgCode)
protected override MapProjection CreateProjection(int epsgCode)
{
if (CoordinateSystemWkts.TryGetValue(epsgCode, out string wkt))
{
@ -57,7 +57,7 @@ namespace MapControl.Projections
and <= MapControl.Wgs84UtmProjection.LastZoneNorthEpsgCode => new Wgs84UtmProjection(c % 100, Hemisphere.North),
var c when c is >= MapControl.Wgs84UtmProjection.FirstZoneSouthEpsgCode
and <= MapControl.Wgs84UtmProjection.LastZoneSouthEpsgCode => new Wgs84UtmProjection(c % 100, Hemisphere.South),
_ => base.GetProjection(epsgCode)
_ => base.CreateProjection(epsgCode)
};
}
}