TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

GNOMONIC PROJECTION [1 record]

Record 1 2016-07-25

English

Subject field(s)
  • Mathematical Geography
  • Cartography
DEF

A perspective azimuthal map projection (of a part of a hemisphere) on a plane tangent to the surface of the sphere, having the point of projection at the center of the sphere.

OBS

Gnomonic projections are used in seismic work because seismic waves tend to travel along great circles. They are also used by navies in plotting direction finding bearings, since radio signals travel along great circles.

French

Domaine(s)
  • Géographie mathématique
  • Cartographie
DEF

[...] projection perspective d'une sphère dans laquelle le point de vue est situé au centre de la sphère.

OBS

La projection [gnomonique] est azimutale et perspective, ni conforme, ni équivalente. Elle altère fortement les angles et les longueurs.

OBS

Elle est la seule projection où les grands cercles de la sphère sont représentés par des droites.

Spanish

Campo(s) temático(s)
  • Geografía matemática
  • Cartografía
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