The drone operates less like an RC plane and more like a Roomba. You can define an area of interest on a laptop, beam it to the eBee, and then just toss the drone in the air where it will autonomously collect imagery. Within 40 minutes, the drone took 225 photos covering 100 acres from an altitude of 120 meters. Larger areas of 2,500 acres and more are possible, but this was sufficient for our needs.
Although I am truly fascinated by what sorts of optical landmarks might yet be developed for field-testing the optical capabilities of drones, as if the world might soon be peppered with opthalmic infrastructure for self-training autonomous machines, it is also quite intriguing to realize that these calibration targets are, in effect, ruins, obsolete sensory hold-overs from an earlier age of film-based cameras and less-powerful lenses. Calibrating nothing, they are now just curious emblems of a previous generation of surveillance technology, robot-readable hieroglyphs whose machines have all moved on.
http://bldgblog.blogspot.com.au/2013/02/optical-calibration-targets.html