Cities are expanding upwards and downwards, as well as outwards. With urban density also increasing, moving people efficiently around the city, often using ageing infrastructure, is quite a challenge.
Building features can be analyzed in the same way that facial recognition software works, revealing previously hidden elements of history.
Where you live affects your health and life expectancy. This makes it possible to map health outcomes against train stations, so that you can readily see the inequalities across cities like Melbourne.