A new map of London, based on a fresh survey, has been very much needed. The last proper survey was carried out in 1682. Since then the London metropolis has grown considerably. (The London metropolis is the cities of London and Westminster and the built-up area around them.)
Rocque's map has taken nine years to survey and engrave. It is published in 24 large sheets, at a scale of 26 inches to the mile. It contains 5,000 names of different places in London.