/// <summary>
/// Checks whether the values of this instance is equal to the values of another instance.
/// Only parameters used for coordinate system are used for comparison.
/// Name, abbreviation, authority, alias and remarks are ignored in the comparison.
/// </summary>
/// <param name="obj"></param>
/// <returns>True if equal</returns>
public override bool EqualParams(object obj)
{
if (!(obj is SharpMap.CoordinateSystems.PrimeMeridian))
{
return(false);
}
PrimeMeridian prime = obj as PrimeMeridian;
return(prime.AngularUnit.EqualParams(this.AngularUnit) && prime.Longitude == this.Longitude);
}
/// <summary>
///
/// </summary>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static IPrimeMeridian ReadPrimeMeridian(WktStreamTokenizer tokenizer)
{
//PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]]
tokenizer.ReadToken("[");
string name = tokenizer.ReadDoubleQuotedWord();
tokenizer.ReadToken(",");
tokenizer.NextToken();
double longitude = tokenizer.GetNumericValue();
tokenizer.NextToken();
string authority = String.Empty;
long authorityCode = -1;
if (tokenizer.GetStringValue() == ",")
{
tokenizer.ReadAuthority(ref authority, ref authorityCode);
tokenizer.ReadToken("]");
}
// make an assumption about the Angular units - degrees.
IPrimeMeridian primeMeridian = new PrimeMeridian(longitude, AngularUnit.Degrees, name, authority, authorityCode, String.Empty, String.Empty, String.Empty);
return primeMeridian;
}