10 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
Angular eccentricity
Earth science; Mapping science
The angle whose sine is the eccentricity. Because the eccentricity always lies between 0 and +1, the angular eccentricity always lies between 0 and π/2.
Instrumental drift
Earth science; Mapping science
A gradual change, in some property of an instrument, which affects the measurements made with that instrument.
Doppler radar
Earth science; Mapping science
(1) An instrument determining radial velocity of an object by comparing the frequency of radiation returned from an object with the frequency of radiation transmitted toward the object. e.g., ...
Mean earth ellipsoid
Earth science; Mapping science
(1) An ellipsoidal body which has the same mass and the same rotational velocity, about the shortest axis, as the Earth and the same value of the coefficient C2 ( J2) in the representation of the ...
Dynamostat
Earth science; Mapping science
An apparatus for applying tension to a surveyor's tape and consisting basically of a lever having two arms, one short and one long, at an oblique angle to one another. The lever is pivoted at the ...
Doppler navigator
Earth science; Mapping science
A self-contained apparatus transmitting two or more beams of electromagnetic or acoustic energy downward toward a reflecting surface and using the change in returned frequency (caused by the motion ...
