21 Terms
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Mapping science
The systemic study of the processes and designs involved with map making.
Industry: Earth science
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Mapping science
Dodging
Earth science; Mapping science
The process of reducing the amount of exposure in certain parts of sensitised material to avoid overexposure in those parts while getting proper exposure in other parts.
Drift
Earth science; Mapping science
(1) The slow motion of a body under the influence of external forces. In particular, the gradual lateral movement of a ship or aircraft caused by currents, winds, or other external forces acting ...
Drum scanner
Earth science; Mapping science
A scanner in which the image being scanned is placed on a rotating drum which rotates slowly while the scanning beam moves rapidly back and forth parallel to the axis of rotation.
Earth spherop
Earth science; Mapping science
(1) The surface obtained by assigning to the spheropotential function a value such that the volume inclosed by the resulting surface is the same as the volume inclosed by the geoid. Because the ...
Doppler error
Earth science; Mapping science
The error which occurs, in determining the radial velocity of a source by using Doppler radar, because of atmospheric refraction. Such an error may result from (a) the false assumption of a ...
Second eccentricity
Earth science; Mapping science
The quantity e' defined, for a conic section, as e' ≡ √ ( (1/k²) (a/b)² - 1), in which a is half the length of the major axis, b is half the length of the minor axis and k² is a constant equal to +1 ...
Eclipse year
Earth science; Mapping science
The interval of time between two successive conjunctions of the Sun with the same node of the Moon's orbit. It averaged 346d 14h 53m 50. 7s in 1900 and was increasing by 2. 8s per century.
