Sandrine Ceurstemont, editor, New Scientist TV
Imagine visiting the World's Fair of 1889 in Paris, France, and seeing the Eiffel Tower just after it was built. Now thanks to an ultra-accurate 3D reconstruction, you can travel back in time to see it.
Created by Mehdi Tayoubi from French company Dassault Syst?mes and colleagues, the buildings in the video are represented exactly to scale, down to minute details such as the flags on the main pavilion. This level of accuracy was achieved by consulting a range of archival sources, such as building plans, drawings and maps, as well as consultations with historical advisors. Often several months were required to model a single building. In many cases, the interior of famous monuments can also be visited virtually.
This snapshot of Paris is just an example of the periods captured for the project, which recreates the city from medieval times to the present. The model can be seen on a range of platforms, such as with online or tablet applications, through an augmented-reality book, in a documentary or even as a virtual reality experience. Interactive sequences illustrate, for example, how buildings were constructed. With augmented reality, an area can be viewed at different moments in time by superimposing models.
According to Jean-Marc Leri, director of the Carnavalet Museum, Paris, who worked with the team, visualising the city with such accuracy changed his perception of historical events. The Bastille prison, for example, stormed by a revolutionary militia in 1789, was much smaller than artistic representations suggest - showing that it was probably quite easy to conquer, contrary to anecdotes.
The team claims that even the oldest models are extremely realistic, due to the extensive information available from the French national archives, but even so the virtual world will be updated as new findings are reported. So far, the focus has been on reproducing buildings, but other aspects of daily life will also be considered in future versions. The team plans to build similar experiences for other cities in the future.
If you enjoyed this post, see how a handheld 3D scanner is mapping a mysterious cave or watch how a drone's 2D photos can be converted into 3D models.
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