1791年華盛頓區的計畫，班尼卡 (Banneker) 為我們首都進行丈量工作。

出處: Ellicott, Andrew, surveyor. "Plan of the city of Washington in the territory of Columbia: ceded by the states of Virginia and Maryland to the United States of America, and by them established as the seat of their government, after the year MDCCC / engrav'd by Sam'l Hill, Boston; in order to execute this plan, Mr. Ellicott drew a true meridional line ... " s.n., 1792. Map Collections: 1544-1999, Library of Congress.