The Library of Congress Geography and Map Reading Room has released a new website with detailed information about the Library's Sanborn Fire Insurance Map collection.  The site contains a searchable and browseable index of Sanborn Fire Insurance maps as well as detailed descriptions and explanations about important issues in using Sanborn maps such as: line style, map scales, publication dates, and abbreviations. There are also detailed explanations and illustrations of the various keys and legends used in Sanborn maps.

The Earth Sciences and Map Library has a large collection of Sanborn maps of California cities that available for use in both microfilm and digital formats. To access the digital Sanborn maps online, users must access the maps from a campus computer or via the library proxy server.