Sanborn fire insurance maps are an excellent resource for anyone researching specific American communities, buildings, or industries from the mid-nineteenth to the mid-twentieth centuries. High production standards insure uniform information over time. To extract the most information, the user needs to understand the original purpose of the maps and how to interpret the visual elements. In addition, the researcher needs access to the right maps.
"Sanborn Fire Insurance Maps: History, Use, Availability,"
The Primary Source: Vol. 26
, Article 2.
Available at: http://aquila.usm.edu/theprimarysource/vol26/iss2/2