Aerial photography Information Search

The aerial survey aircraft of the Aerial Survey and Remote Sensing Branch is equipped with GPS and an onboard IMU system. During aerial photography missions, both the aircraft and a fixed ground reference station simultaneously receive GPS signals. These data are processed using differential GPS methods to obtain the three-dimensional coordinates of the camera’s projection center at the exact moment of exposure. The results are sequentially indexed and compiled into an aerial photography record file.

The recorded information includes: mission ID, photo number, image quality, projection-center coordinates, time of exposure, corresponding base-map sheet number, camera identification code, and other relevant details.