Tube map
The map of the London Underground railway system (or `tube') is called tube map.
The map is considered to be a classic of design: its designer, Harry Beck, realised that because the railway ran mostly underground, the actual physical locations of the stations were irrelevant to the traveller wanting to know how to get to one station from another. To this end, Beck devised a vastly simplified map, consisting of only named stations, and straight line segments connecting them; lines ran only vertically, horizontally or at 45 degrees. Originally designed as a spare-time project, the map was so successful that it was officially adopted by London Underground, and the basic design concepts have been widely adopted for other route maps around the world.
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