|American Border Patrol conducted an aerial survey of 510 miles of border between June 1 and 5, 2007. This survey did not include most of New Mexico or any of Texas.
The survey was conducted in a Cessna TU-206 using a Sony high definition video camera and Canon EOS-1 Dx 17 megapixel camera with a100-400 mm lens. Video and stills are linked to a given geographical locations using a Garmin 296 GPSMap system.
The video and still data were analyzed to locate each type of fencing along the border. This is done using Google Earth. Once each type of fencing is located, Google Earth is used to measure distances.