Sanborn Fire Insurance Maps are a valuable resource for researching local history. They were designed to indicate the potential risk of fire for metropolitan area structures and edifices. The presentation of the maps is similar to a large format plat, showing a sections of municipal area that contain such information as, the outline of the buildings, the size, shape, height, construction materials, location of windows and doors, and what function the building serves. The street names of the particular view are noted as well as the address numbers, sidewalk widths, boundaries, and building use. More information is given in the textual information (such as building materials, reinforced walls, etc.)USING THE SANBORN MAPSFOUR VOLUME SET OF THE MAPS WITH INDEX
(Located at the John F. Germany Library, 2 West)We have some of the original, hardcopy, Sanborn Maps and an index to the four volume set, in the History and Genealogy Collection of the John F. Germany Library downtown. These maps date from 1931 – July 1951. The maps are colored coded in addition to many other notations. Also the hard copy shows the paste-overs that the company did when there was a change of structure or demolition of such. A key to the symbols on the maps appear at the beginning of each volume, on the page entitled "Graphic Map of Volumes" at the very beginning of each book.
ON-LINE DIGITAL SANBORN MAPS
(via Databases and Websites)The on-line maps do not contain paste-overs, but they do have the Sanborn Maps as far back as 1867 which enables the viewer to compare the areas of differing years. In order to access the Sanborn Maps on-line one needs to go to " Online Resources" from the "catalog" menu, then click on "Databases and Websites." Choose "Genealogy," from the left hand side of the page, and scroll down to "Digital Sanborn Maps." When one clicks on this site a page appears that says Digital Sanborn Maps 1867 – 1970. On the bottom you can click on the box that says "Browse Maps," "About The Sanborn Maps," or "Help With This Collection." Choose the one that is most appropriate to your needs.
SANBORN MAPS ON MICROFILM
(Located at John F. Germany Library)The Sanborn maps are on microfilm, as well, for major cities in the following states: Alabama, District of Columbia, Florida, Georgia Mississippi, North Carolina, South Carolina and West Virginia. Assistance with microfilm is offered in History and Genealogy.
INDEX TO ALL SANBORN MAPS
The Sanborn index is broken down by "Streets" i.e. 102 E. Seventh Avenue, "Specials" (which is the name of the structure) i.e. Tampa Public Library. Also there is an index for "Additions and Subdivisions." i.e. Parkland Estates. The index will direct you to a volume and/or sheet number. When you click on the appropriate sheet for your search you will see the address or building for which you had been looking.The Sanborn site has a thorough and detailed "Legend" screen containing explication of the notations on the maps. Also, there is a "Help" screen which enables you in your search. How to use this collection is explained in the section of that name.

