The first photograph was obtained by
Joseph Nicephone Niépce (1765-1833).
The positive image Niépce required an
eight-hour exposure. In 1837, Jacques
Mandé Daguerre obtained the first
"practical" photograph using a process
called the Daguerreotype. Around 1840,
the French geodesist Dominique
François Jean Arago began to advocate
the use of "photogrammetry", using the
daguerreotype, in front of the French
Arts and Science Academy.