Ex Africa semper aliquid novi : (Out of Africa always something new)
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Ex Africa semper aliquid novi: (Out of Africa always something new)
South Africa’s contribution to 20th century Cartography
Elri Liebenberg ICA Commission on the History of Cartogaphy
Eötvös Lorand University, Budapest, 27 June 2012
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1. The African Arc of the 39th Meridian
2. The development of the principles of photogrammetry
3. The Tellurometer and Electronic Distance Measurement
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The African Arc of the 30th Meridian
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Reference ellipsoid: mathematically-defined surface that approximates the Geoid, the truer Figure of the Earth
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Isaac Newton, 1643-1727 Jean-Dominique Cassini, 1652-1712)
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Arc of the 30th Meridian
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The Struve Arc, 1866-1855
FGW von Struve 1793-1864
Connection between the Struve Arc and the African Arc
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DOS surveys Central & East Africa, 1962
DOS mapping Central & East Africa, 1962
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Beacon and plaque at Buffelsfontein
SA Geodetic Triangulation
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Apollo 8 lands on the moon 20 July 1969
The earth seen from the moon (top right), and from outer space (right)
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H G Fourcade and the Principles of Photogrammetry
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H G Fourcade 1865-1948
1903 1940
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Table Mountain and the Cape Peninsula
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Devils’s Peak , Cape Town
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Trevor Wadley and the Tellurometer
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Dr Trevor Wadley tests the prototype of the Tellurometer, 1953
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Wadley explains the principles of the Tellurometer at the British War Office
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Initial testing of the prototype
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The 1950s: The Tellurometer is tested in a variety of countries and climates
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Various models were developed
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Using the Tellurometer with Table Mountain, Cape Town, in the background….
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The latest model: The MRA7 manufactured in South Africa
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Ex Africa semper aliquid novi:
(Out of Africa always something new)
Ex Africa australi semper aliquid novi:
(Out of South Africa always something new)
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Thank you for your attention