def isTravel (por_type):
    """
    The location type comes from the IATA specification:
    - City-related:
      - C for a populated place (usually a city, "metropolitan area",
      in IATA parlance)
      - O for an off-line point (usually both a populated place and a
      travel-related POR)
    - Travel-related:
      - A for airport
      - H for heliport
      - R for railway station
      - B for bus station
      - P for ferry port
    - Combination of a city (C) and travel-related: CA, CH, CR, CB, CP
    """
    # The POR is only city-related, it is not travel-related
    if (por_type == 'C'):
        isTravel = False
    else:
        isTravel = True
    return isTravel