John Wolfgang Roemer was an English army engineer on duty in America during the 1690s. He apparently was in New York as late as 1700 when he travelled into the Indian country. He was called "Colonel Romer" and was known to the Indians as the "King's Engineer!" He drew a number of maps of fortifications in New York and elsewhere. This particular map dated 1698 and showing the Albany layout and its military features is reproduced in The Crown Collection of Photographs of American Maps, selected and edited by Archer Butler Hulbert and published in five volumes in Cleveland, Ohio in 1907. The original reportedly is held in the British Museum. His time in New York is chronicled in NYCD, volume 4!
Key to locations on the map: