The Historical Comparison of the Territory tool allows you to visualize aerial images of Catalan from 1945 until today. The map allows you to select any location and compare aerial images of the area from different years side-by-side. The tool even allows you to create an animated GIF showing how a chosen area has changed over the decades.
The map includes a search facility so you can search for a Catalan location by name. Alternatively you can select a Catalan municipality from the drop-down menu. Once you have centered the map on your chosen location you can choose a year for the two sets of aerial imagery you want to view. The map includes historical imagery from the 1940's, 1950's and for most years since 1983 until the present.
The big yellow button under the map allows you to create an animated GIF for any location. Press the button and the map will create an animated GIF showing your selected area from 1945 to the present day, using all the available historical aerial imagery for your location.
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