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Sanborn maps
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== Modern uses of fire insurance maps == {{unreferenced section|date=October 2020}} [[File:LouisianaSugarExchangeBlockSanborne1908.jpg|right|thumb|Early 20th century Sanborn map showing a (since demolished) block of [[New Orleans]]]] Sanborn maps are found primarily in the archives and special collections of [[town hall]]s and public and university libraries, and remain a resource for people in many different fields. The maps facilitate historical research through the study of urban growth and decline patterns, and for research into the evolution of specific buildings, sites and districts. Genealogists use the maps to locate the residences and workplaces of ancestors. [[Urban planning|Planners]] use the maps to study historic urban planning designs. [[Historic preservation]]ists use the maps to understand the significance and historical evolution of buildings, including their historic uses and building materials in conservation and rehabilitation efforts. [[Demographer]]s and urban geographers use them to study patterns of growth and migration of populations. Environmental scientists also use the maps for historical analysis of properties, as the maps often showed the locations of gas stations, drycleaners, and other potential sources of soil and groundwater contamination. Historic Sanborn maps are available through public or university libraries, including the [[Library of Congress]], and from the copyright owners, Environmental Data Resources (EDR), a division of LightBox.<ref>{{Cite web |title=Sanborn Fire Insurance Maps Now Online |url=https://www.loc.gov/item/prn-17-074/sanborn-fire-insurance-maps-now-online/2017-05-25/ |access-date=2025-01-05 |website=Library of Congress, Washington, D.C. 20540 USA}}</ref><ref>{{Cite web |title=EDRยฎ |url=https://www.lightboxre.com/product/edr-environmental-data-resources/ |access-date=2025-01-05 |website=LightBox |language=en-US}}</ref>
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