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Add Nad27UtmProjection

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ClemensFischer 2022-12-13 23:25:05 +01:00
parent 7cf4ed47a3
commit 57e614978b
3 changed files with 60 additions and 27 deletions
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4
MapControl/Shared/MapProjectionFactory.cs
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@ -36,6 +36,10 @@ namespace MapControl
projection = new Etrs89UtmProjection(epsgCode % 100);
break;
case var c when c >= Nad27UtmProjection.FirstZoneEpsgCode && c <= Nad27UtmProjection.LastZoneEpsgCode:
projection = new Nad27UtmProjection(epsgCode % 100);
break;
case var c when c >= Wgs84UtmProjection.FirstZoneNorthEpsgCode && c <= Wgs84UtmProjection.LastZoneNorthEpsgCode:
projection = new Wgs84UtmProjection(epsgCode % 100, true);
break;

4
MapControl/Shared/TransverseMercatorProjection.cs
View file

@ -15,6 +15,8 @@ namespace MapControl
/// </summary>
public class TransverseMercatorProjection : MapProjection
{
public const double DefaultScaleFactor = 0.9996;
public TransverseMercatorProjection()
{
Type = MapProjectionType.TransverseCylindrical;
@ -22,7 +24,7 @@ namespace MapControl
public double EquatorialRadius { get; set; } = Wgs84EquatorialRadius;
public double Flattening { get; set; } = Wgs84Flattening;
public double ScaleFactor { get; set; } = 0.9996;
public double ScaleFactor { get; set; } = DefaultScaleFactor;
public double CentralMeridian { get; set; }
public double FalseEasting { get; set; }
public double FalseNorthing { get; set; }

79
MapControl/Shared/UtmProjection.cs
View file

@ -16,32 +16,57 @@ namespace MapControl
public const int FirstZoneEpsgCode = 25800 + FirstZone;
public const int LastZoneEpsgCode = 25800 + LastZone;
private int zone;
public int Zone { get; }
public Etrs89UtmProjection(int zone)
{
Zone = zone;
}
public int Zone
{
get => zone;
set
if (zone < FirstZone || zone > LastZone)
{
if (value < FirstZone || value > LastZone)
{
throw new ArgumentException($"Invalid ETRS89 UTM zone {value}.", nameof(value));
}
zone = value;
CrsId = $"EPSG:{zone - FirstZone + FirstZoneEpsgCode}";
EquatorialRadius = 6378137d;
Flattening = 1 / 298.257222101; // GRS 1980
ScaleFactor = 0.9996;
CentralMeridian = zone * 6d - 183d;
FalseEasting = 5e5;
FalseNorthing = 0d;
throw new ArgumentException($"Invalid ETRS89 UTM zone {zone}.", nameof(zone));
}
Zone = zone;
CrsId = $"EPSG:{Zone - FirstZone + FirstZoneEpsgCode}";
// GRS 1980
EquatorialRadius = 6378137d;
Flattening = 1d / 298.257222101;
ScaleFactor = DefaultScaleFactor;
CentralMeridian = Zone * 6d - 183d;
FalseEasting = 5e5;
FalseNorthing = 0d;
}
}
/// <summary>
/// NAD27 UTM Projection with zone number.
/// </summary>
public class Nad27UtmProjection : TransverseMercatorProjection
{
public const int FirstZone = 1;
public const int LastZone = 22;
public const int FirstZoneEpsgCode = 26700 + FirstZone;
public const int LastZoneEpsgCode = 26700 + LastZone;
public int Zone { get; }
public Nad27UtmProjection(int zone)
{
if (zone < FirstZone || zone > LastZone)
{
throw new ArgumentException($"Invalid NAD27 UTM zone {zone}.", nameof(zone));
}
Zone = zone;
CrsId = $"EPSG:{Zone - FirstZone + FirstZoneEpsgCode}";
// Clarke 1866
EquatorialRadius = 6378206.4;
Flattening = 1d / 294.978698213898;
ScaleFactor = DefaultScaleFactor;
CentralMeridian = Zone * 6d - 183d;
FalseEasting = 5e5;
FalseNorthing = 0d;
}
}
@ -57,6 +82,9 @@ namespace MapControl
public const int FirstZoneSouthEpsgCode = 32700 + FirstZone;
public const int LastZoneSouthEpsgCode = 32700 + LastZone;
public int Zone { get; private set; }
public bool IsNorth { get; private set; }
protected Wgs84UtmProjection()
{
}
@ -66,10 +94,7 @@ namespace MapControl
SetZone(zone, north);
}
public int Zone { get; private set; }
public bool IsNorth { get; private set; }
public void SetZone(int zone, bool north, string crsId = null)
protected void SetZone(int zone, bool north, string crsId = null)
{
if (zone < FirstZone || zone > LastZone)
{
@ -81,7 +106,9 @@ namespace MapControl
Zone = zone;
IsNorth = north;
CrsId = crsId ?? $"EPSG:{epsgCode}";
ScaleFactor = 0.9996;
EquatorialRadius = Wgs84EquatorialRadius;
Flattening = 1d / Wgs84Flattening;
ScaleFactor = DefaultScaleFactor;
CentralMeridian = Zone * 6d - 183d;
FalseEasting = 5e5;
FalseNorthing = IsNorth ? 0d : 1e7;