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Sanborn Maps in the California Room


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Sanborn Fire Insurance Maps show in great detail lots, houses, businesses, and other structures located in the city's central district. Sanborn Maps are also color coded to indicate type of construction: concrete, wood frame, brick, etc.

Originally used by insurance agents to set fire insurance rates, Sanborn Maps help date structures, find original lot and building outlines, and locate outbuildings. By comparing maps with different publication dates it is possible to see how cities and neighborhoods evolve and change over the years.

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This page last updated September 03, 2009 by the Web Team

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