Rebar is an essential component of concrete structures. Rebar is placed as a grid, and tied together to hold them in place. This is essential to keep the rods in position when concrete is poured. Rebar tying is a dull, repetitive and surprisingly dangerous job. Rodbusters are bent over most of the time they tie the rebar, causing various musculo-skeletal injuries. SkyTy system is comprised of a ground unit, a SkyTy mapper drone and numerous worker drones. The rodbuster technician first marks the extent of the area needed for tying rebar. The mapper drone automatically flies over the area, and uses its sensors to build a map of the rebar.