/// <summary>
/// Factory method to create meridians by their <see cref="NamedMeridian"/>
/// </summary>
/// <param name="meridan">The named meridian</param>
/// <returns>The meridian</returns>
public static Meridian CreateByNamedMeridian(NamedMeridian meridan)
{
switch (meridan)
{
case NamedMeridian.Greenwich:
return(new Meridian(meridan, 0));
case NamedMeridian.Lisbon:
return(new Meridian(meridan, ProjectionMath.ToRadians(-9.131906111)));
case NamedMeridian.Paris:
return(new Meridian(meridan, ProjectionMath.ToRadians(2.337229167)));
case NamedMeridian.Bogota:
return(new Meridian(meridan, ProjectionMath.ToRadians(-74.08091667)));
case NamedMeridian.Madrid:
return(new Meridian(meridan, ProjectionMath.ToRadians(-3.687938889)));
case NamedMeridian.Rome:
return(new Meridian(meridan, ProjectionMath.ToRadians(12.45233333)));
case NamedMeridian.Bern:
return(new Meridian(meridan, ProjectionMath.ToRadians(7.439583333)));
case NamedMeridian.Jakarta:
return(new Meridian(meridan, ProjectionMath.ToRadians(106.8077194)));
case NamedMeridian.Ferro:
return(new Meridian(meridan, ProjectionMath.ToRadians(-17.66666667)));
case NamedMeridian.Brussels:
return(new Meridian(meridan, ProjectionMath.ToRadians(4.367975)));
case NamedMeridian.Stockholm:
return(new Meridian(meridan, ProjectionMath.ToRadians(18.05827778)));
case NamedMeridian.Athens:
return(new Meridian(meridan, ProjectionMath.ToRadians(23.7163375)));
case NamedMeridian.Oslo:
return(new Meridian(meridan, ProjectionMath.ToRadians(10.72291667)));
}
throw new ArgumentOutOfRangeException("meridan");
}
/// <summary>
/// Creates a new Meridian
/// </summary>
/// <param name="name">Name of meridian</param>
/// <param name="longitude">Longitude of meridian in radians</param>
private Meridian(NamedMeridian name, double longitude)
{
_name = name;
_longitude = longitude;
}
private static void QueryNameAndCode(double longitude, out NamedMeridian name)
{
//in degrees
var val = longitude / ProjectionMath.DegreesToRadians;
if (Math.Abs(val) < Epsilon)
{
name = NamedMeridian.Greenwich;
return;
}
if (Math.Abs(val - -9.131906111) < Epsilon)
{
name = NamedMeridian.Lisbon;
return;
}
if (Math.Abs(val - 2.337229167) < Epsilon)
{
name = NamedMeridian.Paris;
return;
}
if (Math.Abs(val - -74.08091667) < Epsilon)
{
name = NamedMeridian.Bogota;
return;
}
if (Math.Abs(val - -3.687938889) < Epsilon)
{
name = NamedMeridian.Madrid;
return;
}
if (Math.Abs(val - 12.45233333) < Epsilon)
{
name = NamedMeridian.Rome;
return;
}
if (Math.Abs(val - 7.439583333) < Epsilon)
{
name = NamedMeridian.Bern;
return;
}
if (Math.Abs(val - 106.8077194) < Epsilon)
{
name = NamedMeridian.Jakarta;
return;
}
if (Math.Abs(val - -17.66666667) < Epsilon)
{
name = NamedMeridian.Ferro;
return;
}
if (Math.Abs(val - 4.367975) < Epsilon)
{
name = NamedMeridian.Brussels;
return;
}
if (Math.Abs(val - 18.05827778) < Epsilon)
{
name = NamedMeridian.Stockholm;
return;
}
if (Math.Abs(val - 23.7163375) < Epsilon)
{
name = NamedMeridian.Athens;
return;
}
if (Math.Abs(val - 10.72291667) < Epsilon)
{
name = NamedMeridian.Oslo;
return;
}
name = NamedMeridian.Unknown;
}
