Why would someone want to map out an indoor space as a 3D model with color and precision? I would never have thought the usefulness of that would be in questio

Why would someone want to map out an indoor space as a 3D model with color and precision? I would never have thought the usefulness of that would be in question. Any kind of building or construction, virtual spaces, robotics navigation, virtual tours etc. can and already are making use of these things.