The Carte de France or the Cassini Maps were created by four generations of the Cassini family in the 18th and 19th centuries. The Cassini Maps were the first truly accurate national survey based on geodetic triangulation.
Remonter le Temps (go back in time) allows you to view the Carte de Cassini overlain on top of a modern interactive map of France. This historical maps interface presents a number of French vintage maps, which also includes the Carte de l'etat major, a 1950 map of France and historical aerial imagery of France from the 1950's & 60's.
Remonter le Temps provides a number of ways to view the vintage maps. You can view an historical map side-by-side with the modern map of France, you can also select to switch between the modern and vintage maps or you can use an interesting 'lens' view which shows a small circular selection of the historical map overlain on top of the modern map of France.
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