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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 
electronic engraving
Earth science; Mapping science
Engraving in which the original is scanned linearly and an engraver is controlled by the output from the scanner.
epoch
Earth science; Mapping science
(1) A particular instant of time from which an event or a series of events is calculated; a starting point in time, to which events are referred. In particular, a date and ...
x-diameter enlargement
Earth science; Mapping science
The ratio (x+1):1 of the length of the diagonal of an enlarged copy to that of the rectangular original.
datum-centered ellipsoid
Earth science; Mapping science
An ellipsoid which best fits the astro-geodetic network in a particular datum and hence does not necessarily have its center at the Earth's center. More precisely, an ellipsoid ...
galactic equator
Earth science; Mapping science
That great circle of the celestial sphere which constitutes the primary circle of reference for galactic latitude and which passes approximately through the center of the Milky ...
two-step reduction
Earth science; Mapping science
Projecting and printing a small image, then copying and projecting it again to the required size. This is often necessary when the size of the copy or the limitations of the ...
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)