Sanborn Maps at the Library of Congress
The Sanborn Fire Insurance Maps Online Checklist is the Library of Congress’s online, continuously updated version of its 1981 publication, Fire Insurance Maps in the Library of Congress. The searchable database provides listings of the 50,000 editions of Sanborn Maps held by the Library, with links to images as they are added to the system. This is primarily a research tool, not an online exhibition. Because of their detail, fire insurance maps are profoundly useful as historical sources; because of copyright issues, we rarely see them online. Via MapHist and Maps-L.