Republic of South Africa2025-09-182025-09-181972http://hdl.handle.net/20.500.11837/3182Air photography 1964 (Job No.494/64). Surveyed in 1971 and drawn in 1972 by the Trigonometrical Survey Office. Mean magnetic declination of sheet 23.3 degrees West of True North (1972.0). Mean annual change is 4 degrees westwards (1966-1970). Printed and published in the Republic of South Africa by the Government Printer.enMap