The head of the map collections department at the British Library shares ten maps that changed the world.
5. Google Earth. Google Earth presents a world in which the area of most concern to you (in this instance, Avebury in Wiltshire) can be at the centre, and which - with mapped content overlaid - can contain whatever you think is important. Almost for the first time, the ability to create an accurate map has been placed in the hands of everyone, and it has transformed the way we view the world.