wade sheen is from a us company called kaarta and they make hand—held lidar scanners.e kit work? well, the kaarta system uses a 360 degree lidar scanner that's gathering data in three dimensions, an imu which detects our motion, and an image sensor. in combination we know exactly where we are within the environment without using any other signals such as gps or radio signal. because we know exactly where we are at all times, within millimetres, we are gathering a point cloud, and that point cloud can be used by architecture, engineering and construction industry for them to build accurate 3—d models of their buildings for both in construction, to verify what they are building correctly, and for older buildings to establish what is already there. so can you demonstrate for me now, can you make a model of the exterior of the bbc for me? absolutely. ok, i'll let you take it away, wade. 0k, and now we are building the model. the red lines we can see on screen here are harmless laser pulses from the scanner bouncing off the surfaces of the buildings. the more that wade walk