def is_closed(df_task):
    """
    Returns boolean (True / False)
    * True if last point == first point
    * False if last point != first point
    """
    closed = (df_task['Lat'].iloc[0] == df_task['Lat'].iloc[-1]) \
        and (df_task['Lon'].iloc[0] == df_task['Lon'].iloc[-1])
    return(closed)