Britain from above – the series launches on August 10 on BBC One at 9pm and BBC Two at 10pm.The accompanying films on BBC Two reveal how a nation of B-roads, branch lines, the green belt, bomb-damaged cities, rusting factories and former pit heads, has become a country of motorways, hi-speed rail links, high-rise cityscapes sprawling suburbs and galloping urbanisation. Watch this video to see what 3D visualisation is all about: