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- 17 April 2007 - Added 1,100 USGS maps from Delaware, the District of Columbia, Idaho and Illinois
- 05 January 2007 - Added 600 maps, mostly foreign language atlases. Includes 40 historic National Park maps & 3 European road atlases from the 1950s to the 1980s.
- 12 October 2006 - Added 1,300 historic USGS topographical maps from 45 states.
- 15 September 2006 - Moved collection to new server. Added Historic Map Index of 50,000+ online historic maps from 90+ collections.
- 10 August 2006 - Added 800 maps: 1955 Atlas of Denmark, 1987 Atlas of Tokyo, 1970 Atlas of New York City, 1946 Rand McNally Road Atlas, 1967 Gousha Road Atlas, 1989 Rand McNally Road Atlas, 1952 German World Atlas, Atlas of Paris (France, unknown), 1886 maps of Berlin, Germany & Misc. maps
- 10 July 2006 - Online collection started with 750 maps: 1875 Harper's World Atlas, 1923 Hammond World Atlas, 1926 Rand McNally Road Atlas, Misc. digital map images (mainly 1895 state maps)
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