- Louis-Léger Vauthier
Born
Bergerac in theDordogne on 06 April, 1815, Louis-Léger Vauthier was anengineer who designedbridge s androadway s and was elected to the FrenchAssemblee nationale in May, 1849 [http://www.assemblee-nationale.fr/histoire/biographies/1789-1889/Tome_5/VAUDREY_VERDOLIN.pdf] , as a member for thedepartement of Cher.Although
deported for his revolutionary ideas, he became acivil engineer inSpain and thenSwitzerland before returning toParis in 1861. He also spent several years inRecife ,Brazil .He is known to have proposed an early idea for a 'Chemin de fer circulaire interieur' in 1865 [Metropoliain by M Passion, Office Technique Graphique, Bibliotheque historique de la ville de Paris, 1988] - which would have formed an early
Paris Metro . And again in 1872, 1886 and 1887 he put forward more ideas for an urbantransit system in the capital.In
cartography , he is also credited with one of the earliest (if not the first)thematic map to useisolines to display a non-geographic variable on map--- a contour map of the population of Paris in 1874.References
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