Map of the battlefield of Gettysburg, July 1st, 2nd, 3rd, 1863 : First day's battle

Following European military tradition, U.S. Army Engineers published maps for most major battles shortly after the war. However, the Gettysburg after-battle maps were not published until 1876. In comparison to the others, they are quite remarkable. Their production resulted from the collaboration of a civilian, John Bachelder, and a team of Army surveyors under the direction of noted mapmaker, Gen. G. K. Warren. These topographic surveys were so detailed that the resulting maps, issued at a scale of 1 inch equals 1,000 feet, used four-foot contours and shading to represent the terrain. Three maps, rather than one, documented the positions and movements of the armies during the course of the battle.
Courtesy of Boston Public Library