This map, produced by Alexandre Bertrand, a member of the Commission de Topographie des Gaules, shows the results of its census of archaeological remains. The CTG sent forms to its regional correspondents containing the different symbols that appear on the map. Cormoz does not appear on this small map. Other larger maps existed, but so far have not been found. Cormoz probably appeared on one of them.
[The illustrations on this page allow you to see each of the stages in the production of the archaeological map of Gaul, using the example of the site of Cormoz (or Château-Gaillard) in the Ain region.]
Vist the site : Aux sources de l'Archéologie nationale