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Earth science

Any of several geological sciences that are concerned with the earth, its origins, and all of its various structures and physical forms and phenomena.

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Earth science > Mapping science

oblique ascension

Earth science; Mapping science

The arc of the celestial equator, or the angle at the celestial pole, between the hour circle of the vernal equinox and the hour circle through the intersection of the celestial ...

base side

Earth science; Mapping science

A side, of a triangulation network, which is measured with a JÄderin baseline apparatus or with a geodimeter type of instrument.

semimajor axis

Earth science; Mapping science

The line from the center of an ellipse to the extremity of the longest diameter. i.e., one of the two longest lines from the center to the ellipse. The term is also used to ...

axis of tilt

Earth science; Mapping science

A line through the perspective center of a photograph and perpendicular to the principal plane of the photograph.

barometer elevation

Earth science; Mapping science

The vertical distance between mean sea level of the ivory point (zero point) of a station's mercury barometer. The term is denoted by the symbol Hz in international usage. The ...

barometric altitude

Earth science; Mapping science

An altitude or elevation determined using a barometer or barometric altimeter.

artillery criterion

Earth science; Mapping science

The criterion used by the artillery of some countries for accepting or rejecting data, requiring that measurements farther from the average than 4 standard deviations be rejected.