The [[National Archives and Records Administration|National Archives]] has plat books and surveys for the [[District of Columbia Genealogy|District of Columbia]] for 1793 to 1796, 1809, and 1853 to 1883 and the Brewer Collection of Georgetown plats and surveys, 1809 to 1891. The [[Library of Congress]] also has an extensive map collection. | The [[National Archives and Records Administration|National Archives]] has plat books and surveys for the [[District of Columbia Genealogy|District of Columbia]] for 1793 to 1796, 1809, and 1853 to 1883 and the Brewer Collection of Georgetown plats and surveys, 1809 to 1891. The [[Library of Congress]] also has an extensive map collection. |