Autopilot drone maps zigzag routes to clear moss from sloping roofs

Drones have many uses in surveillance and surveying, industrial inspection, aerial photography and filmmaking, package delivery and even dynamic light shows. Their fundamental ability to carry cameras, sensors and other equipment has opened up these diverse applications. Now, research published in the International Journal of Intelligent Machines and Robotics has explored another: the safe removal of moss and lichen from sloping roofs, an otherwise hazardous job for a worker.