- Industry: Earth science
- Number of terms: 93452
- Number of blossaries: 0
- Company Profile:
Founded in 1941, the American Congress on Surveying and Mapping (ACSM) is an international association representing the interests of professionals in surveying, mapping and communicating spatial data relating to the Earth's surface. Today, ACSM's members include more than 7,000 surveyors, ...
(1) The science which concerns itself with the Earth or the life on the Earth. (2) The science which concerns itself with all aspects of the Earth's surface, including its natural and political divisions, the distribution and differentiation of regions, and, often, man in relation to his environment.
Industry:Earth science
A gravimeter having such a low rate of drift that it can be used anywhere in the world without needing to be recalibrated or the dials on which readings are made, reset.
Industry:Earth science
An instrument for measuring the electromotive potential (EMF) generated in an oceanic current by the movement of the water across the Earth's lines of magnetic force. The instrument consists of a pair of electrodes immersed in the sea 200 meters apart and joined by cables (ordinarily three times the length of the ship) to a sensitive, Wenner-ype potentiometer with recorder attached. The instrument is usually referred to as a GEK. It is used in depths greater than 200 meters (100 fathoms)
Industry:Earth science
Geodesy which considers the natural changes which occur in the locations of points on the Earth.
Industry:Earth science
A fissure that penetrates into a continental or insular shelf in a direction approximately perpendicular to the shore line.
Industry:Earth science
The horizontal control datum defined by the following coordinates of the origin and azimuth (clockwise from South) on the Clarke spheroid of 1866; the origin is Golofnin Bay longitude station:<br>
Industry:Earth science
The depth to which ground becomes frozen. This depth may pertain to a particular winter, be the average for several winters, or be the extreme depth to which frost has penetrated.
Industry:Earth science
A function w, of a complex variable z, satisfying the following conditions: (a) w is doubly periodic with two finite, primitive periods whose ratio is not a real number; and (b) the only singularities of w in the finite portion of the plane are poles.
Industry:Earth science
(1) The density of the photographic image of a point source in object space as a function of location in the image - usually of distance from the center of the image. (2) A function giving the illuminance in the image, on a plane perpendicular to the optical axis, of a point-source as a function of distance from the center of the image.
Industry:Earth science
A particular, photographic positive or negative produced in one of a succession of stages of reproduction from an original negative. The original negative is called the first generation. The first positive produced from it is called the second generation product; the negative produced from this positive is called the third-generation product and so on. Quality deteriorates with each successive generation.
Industry:Earth science
