A map of the Kibo cone on Mount Kilimanjaro was published by the British government's Directorate of Overseas Surveys (DOS) in 1964 based on aerial photography conducted in 1962 as the Subset of Kilimanjaro, East Africa (Tanganyika) Series Y742, Sheet 56/2, D.O.S. 422 1964, Edition 1, Scale 1:50,000. Tourist mapping was first published by the Ordnance Survey in England in 1989 based on the original DOS mapping at a scale of 1:100,000, with contour intervals, as DOS 522. West Col Productions produced a map with tourist information in 1990, at a scale of 1:75,000, with contour intervals; it included inset maps of Kibo and Mawenzi on 1:20,000 and 1:30,000 scales respectively and with contour intervals. In recent years, numerous other maps have become available, of various qualities.