A hard problem, but back in 2008, Microsoft Photosynth could stitch together a user’s collection of images into a 3-D model. I remember seeing a detailed model of the exterior of the Notre Dame cathedral.
For people who have physical access to a property, I wonder if you could use a variant of SLAM like the robot vacs - maybe hack one of those laser tape measures to plug into your phone as you walk around the house.
For people who have physical access to a property, I wonder if you could use a variant of SLAM like the robot vacs - maybe hack one of those laser tape measures to plug into your phone as you walk around the house.