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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 
angle-to right
Earth science; Mapping science
The horizontal angle, measured clockwise, from the preceding leg of a traverse to the following leg.
angle method of triangulation adjustment
Earth science; Mapping science
A method of adjusting a triangulation network, using adjustment by conditions, in which the measurements are of angles and the unknowns are corrections to the measured angles. ...
Abney level
Earth science; Mapping science
A rectangular tube to one side of which is fastened a vertical, graduated arc with vernier and carrying a rotatable level. The instrument is small and light enough to be held in ...
equatorial axis
Earth science; Mapping science
(1) A diameter of the Earth, drawn between two points on the Equator. (2) A line drawn thru the center of an ellipsoid, in a plane perpendicular to the shortest axis of the ...
back azimuth
Earth science; Mapping science
The azimuth of a line at the end (the end point) opposite that used for reference. If, on an ellipsoid, the azimuth of point B from point A is given, the back azimuth is the ...
backwater
Earth science; Mapping science
(1) A body of water held back from its natural course by some obstruction such as a contrary current, dam, etc. (2) A region affected by water held back from its natural course ...
angle measuring instrument
Earth science; Mapping science
Any instrument used for measuring angles. Sometimes called an angulation instrument. Examples are the goniometer, the theodolite, the transit, and electronic devices which ...
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)