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Record 1 2013-03-26

English

Subject field(s)
  • Mathematical Geography
CONT

"Average gradient" of air survey film is defined as follows: the lower point M is located on the characteristic curve where the net density is 0.30. With point M as center an arc is described with radius equal to 1.5 on the Log E or density scale. The intersection of this arc with the characteristic curve determines the upper point N. The average gradient is the slope of the line MN.

French

Domaine(s)
  • Géographie mathématique
CONT

Photographie. Contraste d'une émulsion, pente de la courbe qui représente le cologarithme du facteur de transmission (densité optique) en fonction du logarithme de l'éclairement.

Spanish

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© Public Services and Procurement Canada, 2024
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
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