The General Map of Charleston Harbor from 1865, shows rebel defenses and obstructions during the American Civil War. It was prepared under directions from Rear Admiral JA Dahlgren, by CO Boutelle, drawn by Eugene Willenbücher and had lithography at the US Coast Survey by CG Krebs. The map notes that the survey of the channels, fortifications etc. was made after the occupation of the Harbor by the U.S. Naval forces and includes a table of armament of rebel forts. The map also shows a plan of the city, location of shipwrecks, torpedoes and obstructions, roads, and railroads.

The 'General Map of the City of New York' measuring 27 ft. x 31 ft., the largest of an American city every executed and completed in 6 months - was unveiled at the Paris Exposition of 1900 by Chief Engineer of NY City's Topographical Bureau Louis Aloys Risse.