Emmor Cope was an American Civil War officer of the Union Army noted for the "Map of the Battlefield of Gettysburg from the original survey made August to October, 1863", which he researched by horseback as a sergeant after being ordered back to Gettysburg by Maj. Gen. George G. Meade. Cope is also noted for commemorative era battlefield administration and designs, including the layout of the 1913 Gettysburg reunion. Cope had enlisted as a Private of Company A, (First Pennsylvania Reserves), temporarily detached to Battery C, 5th U.S. Artillery, and mustered out as a V Corps aide-de-camp of Maj Gen Gouverneur K. Warren.