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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 
vertical angle bench mark
Earth science; Mapping science
A bench mark the elevation of which has been established by trigonometric leveling.
circle sheet
Earth science; Mapping science
A field sheet or smooth sheet on which intersecting families of curve are shown, each curve corresponding to the locus of points at which some constant angle exists between two ...
Brillouin's gravity reduction
Earth science; Mapping science
Calculation of the value of gravity on a surface lying 100/g kilometers above the Earth's surface.
bonner durchmusterung
Earth science; Mapping science
A star catalog, compiled by F. W. A. Argelander, of over 324,000 stars, accompanied by a chart and having location and approximate magnitude of each star. Usually referred to ...
box sextant
Earth science; Mapping science
A cylindrical box containing two vertical mirrors, one of which can be rotated through 60„a about a vertical axis. The movable mirror is turned by a knob at the top of the box ...
color index
Earth science; Mapping science
The difference between the photographic and photovisual magnitudes of a star or, more generally, the difference between the magnitudes of a single star in two separate and ...
center of level
Earth science; Mapping science
A manufacturer's term for the spindle or spindles which are vertical when the leveling instrument is in used, and about which the leveling instrument, or a part of it, rotates.
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)