Archival Series
Sanborn Map indexes and guides
Thursday, December 31, 1970
AS/13
Sanborn maps are detailed maps of U.S. cities and towns in the 19th and 20th centuries. Originally published by The Sanborn Map Company (Sanborn), the maps were created to allow fire insurance companies to assess their total liability in urbanized areas of the United States. Since they contain detailed information about properties and individual buildings in approximately 12,000 U.S. cities and towns, Sanborn maps are valuable for documenting changes in the built environment of American cities over many decades. This collection includes indexes and guides to Sanborn maps of Portland, Oregon published by the Sanborn Map Company of New York between 1933 and 1970.
