orthophotographie

OBS: orthophotographie : Image photographique obtenue par redressement différentiel à partir d'un cliché aérien à peu près vertical représentant un terrain non plan.

CONT: Orthophotography has made it possible to map areas that would otherwise have gone unmapped ...
OBS: Orthophotos are produced from perspective photos (usually aerial photos) through a process called differential rectification, which eliminates image displacements due to photographic tilt and relief.