The first coordinated map of London's underground railway lines was produced in 1908 and highlighted the routes on a traditional map also showing other geographical features. During the 1920s attempts were made to make the map more readable by removing unnecessary information until only the River Thames remained; the maps remained geographic.
The Docklands Light Railway opened on 31 August 1987 reusing redundant rail routes through the Bow and Poplar areas to reach the new Docklands developments on the Isle of Dogs.
The Low Level station (served by the North London line) underwent a major rebuilding programme in the late 1990s as part of the