This digital scan of Notre Dame offers hope for its restoration after the fire

The devastating blaze at the 850-year-old cathedral in Paris is now under control. The fact that its interior and exterior have been digitally 3D-mapped means the iconic building could be restored to its former glory. The scans: An exact digital replica of the building was captured by a (now deceased) architectural historian, Andrew Tallon, in 2015. He used lasers to map the entire cathedral, measuring the time the laser takes to reach the target and return to create a very precise image. He described the process in this video. The scans he painstakingly captured will be crucial to any future rebuilding efforts.

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