This page lists digital collections of historic maps of London, and individual maps and the projects utilising them. More a personal collection of materials I often have recourse to; for a more comprehensive collection see the excellent ‘Mapography’ compiled by the Map of Early Modern London.
Collections
Harvard. Library of Congress. Michigan Clark Library. David Rumsey.
Wikicommons category: Old Maps of London
Individual maps
1561: Agas Map.
Scans: Map of Early Modern London. British History Online.
Download: Michigan. BHO @ Github.
1667: An Exact Survey of the Streets, Lanes and Churches contained within the Ruines of the City of London.
Scans: NYPL.
1676: Ogilby, A Large and Accurate Map of the City of London.
View: Grub Street Project. British History Online, Yale.
Download: Trove, National Library of Australia.
1682: Morgan & Ogilby, London &c. actually surveyed.
Scans: Library of Congress, Wikicommons,
1746: Rocque
Georectified: Locating London’s Past.
Scans: Harvard. David Rumsey.
Index to Rocque at Google books: best copy, another copy.
1790s: Horwood’s Plan.
Georectified: Romantic London.
1819: Faden’s 4th edition of Horwood’s Plan.
Georectified: Romantic London.
1830: Greenwood’s Map of London.
Scans: Harvard.
1866: Stanford’s Library map of London.
Scans: David Rumsey, (High quality, 7 sheets).
Street Indexes and Directories:
1746: Index to Rocque at Google books: best copy, another copy.
1810: Lockie’s Topography.