Now until 12/28/06, the Library has free access online to Digital Sanborn Maps covering 1867-1970. This series of maps was created for fire insurance companies and contain information such as use and owner of each building and site. The series deals with over 12,000 American municipalities, showing great detail at 50 ft. per inch.
To logon, please go to Database Trials Page at http://dl.lib.brown.edu/eresources/restr/trials.php
For further information, contact Thomas_Stieve@brown.edu