“Remonter le Temps” is a going-back-in-time tool developed by the French mapping agency (IGN) to observe the evolution of the French territory. It is a historical data consultation web service which offers several viewing modes to facilitate the comparison of data: current / old maps, current / old aerial images, infra aerial images (SPOT data).
The purpose of this thematic portal is to disseminate old IGN data (maps and images), provide free visualizations, or downloads of the IGN data.
Going back in time makes it possible to observe the changes in the landscapes over time. For example: movements of the coast, the forest, urbanization of the territory, industrial developments, road networks, agricultural abandonment, etc. The orthophotographic coverage “before 1965” already allows to compare and visualize evolution in multiple places in France.