My professional background is that of a Military Airborne Surveillance Systems and Software Engineer. I have been involved over the years in Radar, Electronic and Optical Surveillance using manned aircraft and latterly drones. The advent of high-quality commercial drones has enabled me to record a number of former PoW sites in ways that was simply not possible a few short years ago.

Three types of Drone Image are shown in the links to sites below; Mapping (Drone Camera pointing down), Angle (Drone Camera at 10 to 80 degrees), Access (Drone Camera at 0 to 10 degrees (i.e the Drone is used as a normal camera to access locations and take photos to places I could not reach on foot)):