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Maps & Geospatial: Sanborn Maps

Initially created to estimate fire insurance risks, the company's maps are frequently used for historical research, and for preservation and restoration efforts.

Site Surveys

Manufacturers Mutual Fire Insurance


"The two thousand industrial site maps in the Manufacturers Mutual Fire Insurance Company Industrial Site Maps Collection, 1894-1954, chronicle sixty years of North American industrial development. Representing industrial sites in thirty-five states, the District of Columbia, and three Canadian provinces, these maps provide valuable information on site selection, power sources, building construction, and space allocation of major corporations, such as General Foods Corporation, International Paper Company, and Ford Motor Company, as well as many lesser-known firms."
Judith E. Endelman [preface] Guide to The Manufacturers Mutual fire Insurance Company Industrial Site Maps, 1894-1954, p.ix

Fill out this form to purchase scans of these building schematics for personal research.

Hexamer General Surveys - Site Surveys

image of Hexamer site survey for Pennsylvania Steam Sugar Refinery 1866

The General Surveys are site surveys of many of the industrial sites in the greater Philadelphia metro area. They date from 1866 through 1896.