public override string GetAttributeValue()
{
return($"geo!" +
$"{(Type != null ? EnumHelper.GetDescription(Type) : "")}" +
$"{(Type == WaypointType.StopOver ? $",{StopOverDuration}" : "")}" +
$"{(Type != null ? "!" : "")}" +
$"{GeoPoint.GetAttributeValue()};" +
$"{(TransitRadius != null ? $"{TransitRadius}" : "")};" +
$"{(UserLabel != null ? $"{UserLabel}" : "")};" +
$"{(Heading != null ? $"{Heading}" : "")}");
}