The lovely people at the Centre for Metropolitan History and Museum of London Archaeology have produced a single georeferenced map from John Rocque’s 1746 map of London, which they’ve also overlaid onto a Google map.
The map itself can be found here: http://www.locatinglondon.org/, and the background information provided also makes fascinating reading. The amount of work that went into simply(?) assembling the pieces of John Rocque’s map into a seamless whole is astounding.
For those of us who’ve struggled with the squares of the map that were previously available online, this will save hours – except for the bit where it becomes so much fun, especially comparing then with now, that I can see myself losing just as many hours as I gain. Ah, well. As vices go, it’s not that bad.