The Nivellement Général de la France network was re-established by Charles Lallemand starting in the 1880s.
Sources
- Le nivellement - Géodésie (geodesie.ign.fr)
- https://www.persee.fr/doc/ingeo_0020-0093_1937_num_2_1_6311 (persee.fr)
- https://cths.fr/an/savant.php?id=112601 (cths.fr)
- https://www.aftopo.org/lexique/nivellement-lallemand-reseau-de/ (aftopo.org)
- https://henripoincare.fr/s/Correspondance/item/362 (henripoincare.fr)
- https://www.les-sorgues-vertes.com/204+le-nivellement-general-de-la-france-particularites-vauclusiennes.html?version=computer (les-sorgues-vertes.com)
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