Mosaics of Aerial Photos of the Coasts of Quebec: Ressources List | Mosaïques de photos aériennes des côtes du Québec : Liste des ressources

The photos, captured vertically along flight lines previously supplied by DFO, were georeferenced and orthorectified with a ground resolution of 30 cm. An UltraCam Xp digital multi-spectral camera was used, mounted on an aircraft at an altitude of 16,500 metres, to obtain a swath of at least 4 km on the ground.

An overlap of 60% to 80% was required to optimize the image during mosaicking. Certain environmental criteria had to be met to ensure image homogeneity. The photos had to be taken as close as possible to low tide, synchronized with the period of the day when the sun's angle of elevation was greater than 25°, wind speed less than 20km/h, waves less than 1 metre high, and no cloud or fog under the aircraft.