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Digital Sanborn Maps, 1867-1970 (Washington, DC and Maryland)

Sanborn maps are large-scale plans of a city or town, drawn at a scale of 50 feet to an inch. There were created to assist fire insurance companies as they assessed the risk associated with insuring a particular property. The maps list street blocks and building numbers including numbers in use at the time the map was made and previous numbers.
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Only available to registered users.
Publisher:
ProQuest
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