Finding scanned historical maps can be a bit cumbersome. Now, the site Old Maps Online, has made finding those maps a whole lot easier. Old Maps Online is a portal that allows the user to search geographically for historical maps housed via some of the largest online map collections. Current collections include the David Ramsey Collection, the British Library, the Moravian Library, and the National Library of Scotland. Collections from around the world will continue to be added throughout 2012.
All collections added are from sites that offer high resolution historical scanned maps that have been already geo-referenced and are viewable online without requiring logins or payments from the viewer.
Read more at: http://gislounge.com/searching-for-old-maps-online/