MOTCO MAPS
The database currently contains the following maps. The first four are major maps in the history of London, each associated with an original survey. They also have place name indexes. You can now buy reproductions of parts of the first two maps.

London and Its Suburbs 1862 Edward Stanford's Library Map (6 inches to the mile, first edition). 18,570 name index. Reproductions from this map now available.
London, Westminster & Southwark 1799 Christopher Horwood (26 inches to the mile, first edition). Reproductions of this map now available.
London 1830 Christopher and John Greenwood (8 inches to the mile, 2nd edition)
London, Westminster and Southwark 1746 John Rocque (26 inches to a mile, first edition)

The following maps are also indexed:

Fifteen Miles Round London 1786 John Cary (one inch to the mile, first edition). 2000 name index, probably the first "pocket atlas"
London and Westminster (and Docklands) 1802 John Fairburn (3 3/4 inches to the mile 7th edition) with commentary by Ralph Hyde.

There are also the following lesser maps:

Prospect and Map of London c.1705 Johann Baptist Homann
London, Westminster and Southwark 1736 Homann Heirs
Cities of London and Westminster and Borough of Southwark John Rocque 1749 (small version of the above)