I can't read French. Can somebody kindly explain what this map is supposed to represent? I've searched the names of some of these forts in Google, but can't find any information about them, and I don't seem to recall any of my English books on Roman Gaul and Germany even mentioning such fortifications, but then those books don't even discuss the "Saxon Shore" forts. However, I did hear mention of "limes belgicus" (no info to be found again) and was wondering if this map could represent that?