3D Location Within Large Fire Damaged Historic Building

I’m putting in place a database to record architectural features/objects in a large fire damaged historic building. We are recording location via a single 3D grid (x,y,z) covering the whole building. At the moment people have to identify the grid location by finding the point on drawings/ortho photographs. I have been wondering whether there is a way way of giving people a device which would give a read out of the x,y,z position that they could transfer to the database. The building has a temporary roof, has very thick brickwork internal and exteranl walls (1m+) and is divided up into a number of different areas. The users are conservators and architects rather than digital professionals so it would need to be something very simple.

Am I dreaming or is there a solution? I am not an electrical engineer so this would either need to be something that is available off the shelf or we could commission someone to make.

Any thoughts would be appreciated.

It is certainly possible to rapidly digitize the interior walls of a room using LIDAR, as demonstrated in two videos in the post below. This particular scanner is home made (by an expert) but there are commercial versions. Scroll down to the second video for an interior application.

https://www.eevblog.com/forum/projects/ … dar-build/

How you would use that information to identify objects is a different problem, but inspecting a 3D representation of a digitized scan and picking points might be very useful.