ground nadir


ground nadir
The point on the ground that is vertically beneath the perspective center of the camera lens. On a true vertical photograph, this coincides with the principal point.

Aviation dictionary. 2014.

Look at other dictionaries:

  • ground nadir — antžeminis nadyras statusas T sritis Gynyba apibrėžtis Žemės taškas vertikaliai žemiau kameros lęšio perspektyvos centro. Vertikaliojoje nuotraukoje jis sutampa su pagrindiniu tašku. atitikmenys: angl. ground nadir pranc. nadir au sol …   NATO terminų aiškinamasis žodynas

  • nadir au sol — antžeminis nadyras statusas T sritis Gynyba apibrėžtis Žemės taškas vertikaliai žemiau kameros lęšio perspektyvos centro. Vertikaliojoje nuotraukoje jis sutampa su pagrindiniu tašku. atitikmenys: angl. ground nadir pranc. nadir au sol …   NATO terminų aiškinamasis žodynas

  • Nadir line — A nadir line is a line traced on the ground directly beneath an aircraft while taking aerial photographs of the ground from above. This line connects the image centers of the successive vertical photographs. These photographs are generally taken… …   Wikipedia

  • Reigns of Nadir Shah and Zahir Shah — Reign of Mohammed Nadir Shah, 1929 1933 Mohammed Nadir Shah quickly abolished most of Amanullah Khan s reforms, but despite his efforts to rebuild an army that had just been engaged in suppressing Tajiks and Hazaras, the forces remained weak… …   Wikipedia

  • Above ground level — In aviation and atmospheric sciences, an altitude is said to be above ground level (AGL) when it is measured with respect to the underlying ground surface. This is as opposed to above mean sea level (AMSL), or in broadcast engineering, height… …   Wikipedia

  • true vertical photograph — An aerial photograph taken with the optical axis of the camera perpendicular to the ground. In such a photograph, the principal point, the ground nadir, and the photo nadir coincide. Whereas the principal point is always the geometric center of a …   Aviation dictionary

  • bottom — I (New American Roget s College Thesaurus) n. base, foot, sole; foundation; buttocks. See support, lowness, rear. v. fathom; run aground. See depth. Ant., top, surface. II (Roget s IV) n. 1. [The lowest part] Syn. underside, nether portion, base …   English dictionary for students

  • antžeminis nadyras — statusas T sritis Gynyba apibrėžtis Žemės taškas vertikaliai žemiau kameros lęšio perspektyvos centro. Vertikaliojoje nuotraukoje jis sutampa su pagrindiniu tašku. atitikmenys: angl. ground nadir pranc. nadir au sol …   NATO terminų aiškinamasis žodynas

  • azimuth — i. A direction expressed as a horizontal angle, usually in degrees, measured clockwise from a reference datum or direction, usually north. The azimuth will be a true zenith, grid azimuth, magnetic azimuth, or relative azimuth, depending upon… …   Aviation dictionary

  • principal plane — A vertical plane which contains the principal point of an oblique photograph, the perspective center of the lens, and the ground nadir …   Military dictionary


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