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| Library of Congress Map Division | |
|---|---|
| Name | Library of Congress Map Division |
| Established | 1897 |
| Location | Washington, D.C. |
| Collection size | Over 5 million items |
| Director | (See Organization and Staff) |
| Website | (See Services and Access) |
Library of Congress Map Division The Map Division of the Library of Congress is the central cartographic repository for the United States federal legislative library, housing extensive cartographic, atlases, globes, and geographic information collections. It supports researchers studying exploration, colonization, nation-building, urbanization, and diplomacy through primary cartographic sources tied to figures such as Lewis and Clark Expedition, Thomas Jefferson, Meriwether Lewis, William Clark, Benjamin Franklin. Its holdings inform scholarship on conflicts like the War of 1812, American Civil War, Mexican–American War, and events such as the Louisiana Purchase and the Treaty of Paris (1783).
The Map Division traces roots to congressional interest in printed maps collected during the 19th century and formal organization at the end of the 19th century, intersecting with collections assembled by figures like Thomas Jefferson and institutional developments involving the Library of Congress and the Congressional Research Service. Early acquisitions include maps used in the Lewis and Clark Expedition and cartography related to the Spanish Empire and British Empire. During the 20th century, the Division collected wartime cartography from World War I and World War II and acquired thematic atlases from publishers such as Rand McNally and cartographers associated with the U.S. Geological Survey. Notable historical interactions include material linked to the Monroe Doctrine era and cartographic evidence used in border disputes like cases before the International Court of Justice.
The Division's holdings exceed five million items, encompassing manuscript maps, printed maps, atlases, topographic sheets, nautical charts, panoramic maps, bird's-eye views, and globes. Significant collections relate to continental exploration (items connected to the Lewis and Clark Expedition, Spanish Florida maps), colonial cartography from the Dutch Empire and French Empire, naval charts tied to Admiral Nelson-era hydrography, and regional series from the U.S. Geological Survey and the Ordnance Survey. Thematic strengths include urban maps for cities such as New York City, Philadelphia, Boston, Chicago, and San Francisco; wartime maps from campaigns like the Battle of Gettysburg, Normandy landings, and the Battle of the Bulge; and diplomatic cartography relevant to treaties such as the Treaty of Guadalupe Hidalgo.
Researchers can access materials onsite in Washington, D.C., request reproductions, and use digital collections via the Library's public access portal. The Division provides reference services to patrons including historians linked to institutions like the Smithsonian Institution, legal researchers at the Supreme Court of the United States, and urban planners affiliated with the National Park Service. Interlibrary loan and reproduction policies support scholars from the American Historical Association, Society of American Archivists, and cultural institutions such as the National Archives and Records Administration. Special reading room procedures reflect preservation concerns for fragile items like hand-colored atlases by publishers similar to John Speed and manuscript charts by navigators associated with the Age of Discovery.
The Map Division collaborates with technical programs to digitize maps, atlases, and associated metadata, following standards used by initiatives such as the Digital Public Library of America and the Biodiversity Heritage Library for high-resolution imaging. Preservation efforts address paper stability, map flattening, deacidification, and storage in climate-controlled stacks, paralleling conservation practices at the National Gallery of Art and the Library and Archives Canada. Projects have included georeferencing historic maps for research linking to datasets from the U.S. Census Bureau, National Oceanic and Atmospheric Administration, and the U.S. Geological Survey. Long-term digital stewardship aligns with protocols from the International Federation of Library Associations and Institutions.
Among celebrated items are rare globes and manuscript charts associated with explorers of the Age of Discovery, printed atlases by Gerardus Mercator-era traditions, Civil War cartography including maps used during the Siege of Vicksburg and the Appomattox Campaign, and early European depictions of North America tied to the Cartography of Abraham Ortelius. Signature projects include large-scale digitization efforts that made items accessible for exhibitions on topics like the Transcontinental Railroad, Manifest Destiny, and the Great Migration (African American), as well as collaborative geospatial projects supporting research by the National Endowment for the Humanities.
The Division operates within the Map, Geography, and Spatial Data Directorate of the Library; leadership includes curators, conservators, digital services specialists, and reference librarians who collaborate with cartographic scholars such as those affiliated with the Royal Geographical Society, American Geographical Society, and university departments at Harvard University, University of Oxford, University of Cambridge, and Columbia University. Staff expertise spans manuscript cartography, nautical chart conservation, georeferencing, and metadata management consistent with standards from the Library of Congress and international cataloging bodies like the International Council on Archives.
The Map Division undertakes exhibitions, lectures, and publications in partnership with organizations such as the Smithsonian Institution, National Archives and Records Administration, National Endowment for the Humanities, and university presses at Princeton University Press and Oxford University Press. Outreach includes educational programs for students and collaborations with municipal archives in cities like New York City, Los Angeles, and Chicago, and with international institutions such as the British Library and Bibliothèque nationale de France. Digital outreach leverages platforms like the World Digital Library to broaden access for global researchers and educators.