t what is special about the tube map is that, unlike standard maps, it does not even attempt to reflect the geographical location of the different underground (or “tube”) lines and stations. Its initial designer, Harry Beck, realised that because the lines run mostly underground, the exact physical locations of the stations were largely irrelevant to the traveller wanting to know how to get from one station to another. What matters to them is the relation between the stations, and which lines connect th