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Record 1 2004-01-08

English

Subject field(s)
  • Mathematical Geography
  • Cartography
DEF

A real mark, such as a cross or dot, lying in the plane or the object space of a photograph and used singly as a reference mark in certain types of monocular instruments, or as one of a pair to form a floating mark as in certain types of stereoscopes. In stereoscopic map plotting instruments which utilize a stereo pair of index marks, each mark is called a half-mark.

French

Domaine(s)
  • Géographie mathématique
  • Cartographie

Spanish

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