The navigation of the plane is acurately controlled by means of a GPS into which the parameters of the flight plan were introduced. Another GPS allows the photo operator to decide where to take the pictures.
The camera can be linked to a compact inertial station, recording in real time the précise 3D orientation of the camera. This information is required to process the photos in a photogrammetric workflow, allowing for accurate 3D measurements of objects seen on the photos.
As photos are digital, we can immediately control their quality, aboard the plane. This possibility is particularly useful when the weather conditions are not very good (for example to identify which photos are partially covered with clouds)
The compacity of this material makes its transport very easy (the whole material fits in a suitcase).
All operations of navigation and photography can be achieved by a single operator, in addition to the pilot of the plane who is recruited locally with the plane.
For a long time, we used small-format cameras (24x36) for our air photos. Since 2003, we use a high performance digital SLR camera equipped with a wide-angle lens and/or variable focal lenght (zoom). The performances of this equipment are equivalent or even superior to those obtained with film cameras and because all the process is digital, we can save time.
The camera is mounted outside of a plane by means of a platform allowing to control the verticality and the orientation of the pictures. This platform is conceived so as to be able to be easily fixed to a very large number of models of planes and helicopters.
When operating abroad, the plane is rented locally, only for a duration of the photographic activities. This avoids the costs and delays related to transit flights and to administrative formalities.