To build a 20 foot (6 meter) and 213 ft (65 m) long dry-stone ... only draw a 3D map of the site, it can find in situ boulders dotting the landscape and incorporate them into the wall.

ETH Zurich researchers have trained an autonomous excavator to construct a dry- stone wall 65m long and 6m high out of random rocks and building waste. Using sensors including cameras and lidar, it ...