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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 
coelostat
Earth science; Mapping science
A mirror or arrangement of mirrors rotated at such a rate by a motor as to direct light from the stars into a fixed direction on the ground, e.g., into a stationary telescope.
substitute center
Earth science; Mapping science
A point, on a photograph, which is used as a radial center (because of its ready identifiability) instead of the principal point, the nadir point, or the isocenter.
chopping
Earth science; Mapping science
Periodically interrupting, by means of a shutter, that photographic image of the track of a star or artificial satellite which is produced when the camera's position is held ...
bridge
Earth science; Mapping science
A structure, including its supports, erected over a depression or an obstruction, having a track or passageway for carrying traffic or other moving loads, an having an opening ...
osculating circle
Earth science; Mapping science
A circle which moves along a specified curve so as to be tangent to that curve at each point. In particular, in route surveying, the osculating circle to a spiral.
Brosche's method
Earth science; Mapping science
A method of determining corrections α and Δδ to right ascension α and declination α of one star catalog with respect to the right ascension and declination in another by ...
equatorial circle
Earth science; Mapping science
That circle, on a rotational ellipsoid, in which a plane through the center of the ellipsoid and perpendicular to the axis of rotation intersects the surface. If the rotational ...
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)