- This handy little atlas features high quality Collins mapping. A huge amount of detail is contained within the mapping without compromising the clarity. Central London is mapped at a larger scale. Scale: 1:20,000 (3.17 inches to 1 mile), Central area 1:10,000 (6.3 inches to 1 mile). A map of Heathrow Airport is included, as well as a separate theaters and cinemas map.