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

Equilibrium theory of the tides

Earth science; Mapping science

A theory which assumes that the waters covering the face of the Earth respond instantly to the tide producing attractions of the Moon and Sun, and form a surface which is in equilibrium under the ...

True equinox and equator

Earth science; Mapping science

The celestial reference system determined by the instantaneous positions of the celestial equator and ecliptic. The motion of this system is caused by the progressive effect of precession and the ...

Rectilinear ellipse

Earth science; Mapping science

The straight line (a degenerate ellipse) formed by letting the eccentricity of an ellipse approach zero while keeping the major axis fixed.

Element

Earth science; Mapping science

Something fundamental, essential, or irreducible which helps make up or define a larger whole. SEE, in particular, element, optical; element, orbital.

Standard epoch

Earth science; Mapping science

A date and a time which specify the reference system to which celestial coordinates are referred. Coordinates in star catalogues are commonly referred to the mean equinox and equator of the ...

A mechanical or electromechanical device on wheels which measures slope and distance, and automatically and continuously integrates their product into difference of elevation. The version developed ...

Gravitational potential energy

Earth science; Mapping science

(1) The gravitational potential energy at a point P is the amount of work done by (or from) a conservative field in carrying a unit mass to P from infinity. (2) The difference ΔW in gravitational ...