Big London A-Z Street AtlasNavigate your way around London with this detailed, easy to use and up to date A Z Street Atlas. Large scale A Z street mapping of London. This A4 street atlas offers the perfect combination of coverage and clarity, the area covered ranges from Heathrow Airport all the way to Chingford at a scale of 4. 25 inches to 1 mile (6. 71 cm to 1 km), while a detailed map of Central London is at a larger scale of 8. 5 inches to 1 mile (13. 42 cm to 1 km). The