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Maps and Geospatial Resources

U.S. Government Resources

A wreck map of the Great Lakes from 1886 to 1891 (Source: National Oceanic and Atmospheric Administration)

Cartographic | National Archives and Records Administration
Collections with Maps | Library of Congress
Historical Map & Chart Collection | National Oceanic and Atmospheric Administration
Maps at NARA of Interest to Genealogists | National Archives and Records Administration
Online Collections Listed by Theme | Library of Congress