translate English to French: These components are of two basic types: (1) wildlife concentrations, whose locations are generally, but not precisely, the same from year to year, so that they must be located regularly during the flying season; and (2) components that are stationary, but may have a different status from year to year, such as raptor nests, which may be active one year and inactive the next.
A l’origine, le SIG était surtout une cartothèque où étaient rangées les cartes établies pendant la saison des exercices à basse altitude aux fins de la restriction des survols et de la surveillance.