With thousands of Aerial Pictures taken with UAV, Pixel4D is able to utilize them and convert the information into a 3D map. Very impressive. The UAV can fly off to do the job while the software can help to analyze and convert.
Pixel4D is a spinoff from EPFL. In the video, it mentions that with the technology, farmers can monitor the growth of their crops with 3D aerial map. Here is the video.