The London Evolution Animation is a fascinating visualization, created by the Bartlett Centre for Advanced Spatial Analysis at University College London, which tracks the evolution and development of the city of London from its creation as a Roman city in 43 AD to its current status as one of the world's megacities.
The visualization shows road segments and networks appearing gradually over a map of London, with accompanying text talking about the city's evolution through different periods of its history.
The London Evolution Animation took nine months to make, with a variety of methods and data borrowed from several sources. Data for the Roman and Medieval periods as well as the 17th and early 18th centuries was provided by the Museum of London Archaeology. Road networks from the late 18th century to the present were supplied by the University of Cambridge's engineering department.