Notre Dame is a lesson
Four years ago, an art historian used lasers to digitally map Notre Dame.
That effort has prove invaluable in the re reconstruction of the building after the fire. It should be obvious now that digital mapping is invaluable. It’s imperative that every important building have a digital twin (DT).
DTs are easy
DT’s are as easy to make as flying a drone equipped with mapping sensors outside the building. ?Flying a drone inside or using a mobile robot will render every alcove and nook. Software can recreate the building allowing users to do a virtual walk-through.
It’s not a question of fire or other disasters. There’s other reasons to maintain a digital twin. With a digital twin you can map out upgrades to building systems such as electrical wiring, plumbing and air ducts.
A growing number of construction firms are using drones to capture and map construction of buildings. . Drones fly around and through properties and construction, mapping terrain and construction. Building Inspectors also use drones to look for and keep tabs on potential problems..
Just before the Notre Dame fire, the EU had already made plans to begin digitizing heritage sites.
Using LIDAR, photogrammetry, infrared, and probably GNSS or GIS mapping and storing existing buildings is easy. There really isn’t a good excuse for not creating DTs of every cultural and historical significant building. Making a DT is onetime expense in the maintenance budget with updates whenever changes are made.