Earth science

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

optical center

Earth science; Mapping science

That point, on the optical axis of an optical system, which is midway between the front and rear nodal points of the system. For a thin lens in air, the optical center, front ...

color filter

Earth science; Mapping science

An optical filter which allows only light within a certain narrow range of frequencies to pass through. Color filters have been used in the telescopes of both leveling ...

coefficient of thermal expansion

Earth science; Mapping science

The relative change (expansion or contraction), expressed as a ratio, in a linear dimension of a body, corresponding to a change of 1 o in the body's temperature. The ...

cluster analysis

Earth science; Mapping science

A statistical procedure for identifying those points in the data about which the data seem to cluster.

tracking camera

Earth science; Mapping science

A camera placed on a mountings which allow the optical axis to be kept pointed in the direction of a moving object such as an automobile, a missile or an artificial satellite. ...