/// <summary>
/// 哈希数
/// </summary>
/// <returns></returns>
public override int GetHashCode()
{
return(CoordinateSystem.GetHashCode() * 3 + Datum.GetHashCode() * 13);
}
/// <summary>
/// 哈希数
/// </summary>
/// <returns></returns>
public override int GetHashCode()
{
return(CoordinateSystem.GetHashCode() * 3 + Datum.GetHashCode() * 13);
}