The New York Public Library has just released a collection of 20,000+ high resolution historical maps:
http://www.nypl.org/blog/2014/03/28/open-access-maps
these can be really cool to include in your tree!
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Brian Johnson
Founder and Lead Developer - Jamroom
https://www.jamroom.net
updated by @brian: 02/01/15 07:58:53AM
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