Definition:
Mesure précise d’un terrain et de ses caractéristiques physiques, et report de ces éléments sur une carte. Un levé de terrain implique trois actions principales: mesure de la longueur, nivellement et mesures angulaires. Le levé de terrain comprend le levé géodésique, le levé topographique, la photogrammétrie, le levé cadastral, le levé hydrographique et le levé technique.
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Food and Agriculture Organization of the United Nations, AQUASTAT Web Site
FAO-SAFR, 2002, Irrigation Manual Module 2, Natural Resources Assessment, By: Andreas Savva & Karen Frenken