Mapping science

Mapping science

The systemic study of the processes and designs involved with map making.

Industry: Earth science

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Mapping science

Butterfly shutter

Earth science; Mapping science

A shutter shaped like a filled in figure 8 and rotating about a pivot through the waist of the figure in such a way that light passing through the system can be interrupted by one or the other of the ...

Collocation method of least squares

Earth science; Mapping science

(1) A special case of the method of least squares, in which the set of unknowns is divided into two subsets with different weights.

Board on geographic names

Earth science; Mapping science

A board established by the act of 25 July 1947, (61 Stat 456, 43 U. S. C. 365) to provide uniformity in geographic nomenclature and orthography through-out the Federal Government. Membership is ...

Clock rate

Earth science; Mapping science

The rate of change of a clock correction; the amount gained or lost by a clock in a unit of time. When applied to a chronometer, the quantity is called chronometer rate. Clock rate is usually ...

Calibration correction

Earth science; Mapping science

(1) The value to be added to or subtracted from the reading of an instrument to obtain the correct reading. (2) The correction, to the nominal length between two graduations on a surveyor's tape, ...

Boussinesq approximation

Earth science; Mapping science

(1) An approximation (Boussinesq 1903), to the exact equations of motion of water, which neglects, in the inertial term, variations in the density of water. (2) An approximation (Boussinesq 1903), ...