Sanborn maps are large-scale plans of American cities and towns, created 1867-1970. They were created to assist fire insurance companies to assess the risk associated with insuring a property. The maps were drawn at a scale of 50 feet to one inch. ProQuest Sanborn Maps Geo Edition provides geo-coding and indexing by address for a selection of Sanborn maps. Searching can be done by address or by latitutde/longitude coordinates. Maps from different years can be layered, including modern maps using the Google Map interface.
Eight states are included: Florida, Illinois, Massachusetts, Michigan, New York, North Carolina, Pennsylvania and Virginia.
Cities included: Baltimore, Boston, Charlotte, Detroit, Los Angeles, Miami, New York, Newark, Philadelphia, Richmond, Seattle and Washington DC.
For other all areas use Digital Sanborn Maps 1867-1970, without geo-coding.