Sylvain Meinrad Xavier de Golbéry (1742-1822) was a French geographer and military engineer. He is best known for his account of his travels in western Africa in Fragmens d’un voyage en Afrique  . His book was translated into English by W. Mudford with a new title of Travels in Africa. He refers to Atlantis in the Atlantic with the Azores and Canaries as ‘its shattered remains’[p.207] with a possible connection with the Atlantes of northwest Africa.
Canals are recognised as having been critical for the development of many ancient civilisations and are also evidence for the engineering capabilities of these early societies. Recent discoveries(a) in the Peruvian Andes revealed canals over 5,400 years old.
Canals in the capital city of Atlantis are described by Plato in great detail but with dimensions that are quite unrealistic. One possible explanation for this; the whole story is fiction and the dimensions were just pulled out of thin air. However, if Plato or anyone had been writing fiction you would expect such details to be closer to reality. In fact Plato expresses incredulity at these dimensions but notes them as a record of Solon’s report. This adds weight to the theory that the numbers had been transcribed erroneously from the original Egyptian sources or the units of measurements were misunderstood.
To my mind the extent of the irrigation canals recorded by Plato would seem to suggest that the Plain of Atlantis was subject to a dry climate.
The dimensions might be that of a natural feature adapted to suit the needs of a fortified harbour. The latter idea has been proposed and expanded on by Ulf Richter(e).
Extensive ancient canal systems have been identified in both North and South America. John Jensen has discovered one such network in the Louisiana region(a), but has had the good sense not to try to associate it with Atlantis. Jensen’s site also deals with canals in Mexico and Africa. His claim regarding the Louisiana canals has been challenged online(c) and as of March 2016 his own website is offline. However, in early 2017 Jensen published another paper on the Migration-Diffusion website(d) about ancient canals, which includes a reference to the ancient canals on the US Atlantic and Gulf coasts, also dated to the 6th millennium BC.
Further information regarding the Mexican pre-Colombian irrigation systems is available on the Ancient Origins website(b).
Maurice Nguepe Taba II (1969- ) was born in Cameroon in Central Africa. He has studied in Germany and Canada and founded the Institute of African Studies in Montreal, Quebec. He has written both fiction as well as non-fiction including Afrika als Atlantis (Africa as Atlantis) in which he considers the story of Atlantis as “the foundation of Greek colonial ideology” that was later reflected in the European colonialism that developed from the 16th century onwards. Apart from the political philosophy Nguepe also believes that Africa had been Atlantis, perhaps revealed by his association with the Frobenius Institut in Frankfurt’s J.W.Goethe University.
Hans Rudolf Stahel is possibly Swiss(a) and an architect by profession, he is also the author of a guide to Atlantis entitled Atlantis Illustrated, with a foreword by Isaac Asimov. While Stahel has located Atlantis in the Atlantic, Asimov opted for the destruction of Thera as the inspiration for Plato’s story.
The illustrations are good, but unfortunately are only in black and white. Stahel based all the designs and plans of Atlantis on Plato’s descriptions. His drawings, more than anything else, demonstrate the improbability of dimensions recorded by Plato. The consistent degree of over-engineering forces us to question the accuracy of Plato’s numbers and consider whether this perceived exaggeration is the result of an erroneous transcription of numerals or a misunderstanding of the units of measurement employed.
Stahel depicted Atlantis as an island, centred on the Azores with a chain of islands stretching from there to Newfoundland more or less in a straight line. He also envisages an Atlantean Empire stretching from parts of the west coast of America to include the Mississippi, Missouri and Ohio river basins, Central America and as far south as the Amazon basin. East of the capital he includes all of coastal Europe and the Mediterranean (except Greece), along the coast of north and west Africa, the Middle East and on into India. Imaginative if nothing else.
*The only other book attributed to H.R. Stahel is Die Pfahlbauer – Entstehung und Geschichte eines Pfahlbaudorfes, which deals with ancient European pile-dwellings that are comparable with the numerous crannogs of Ireland(b) .