- Branża: Earth science
- Number of terms: 93452
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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, ...
A line of demarcation between adjoining regions at sea. The boundary may be at the surface of the sea or at the bottom.
Industry:Earth science
A (legal) instrument emanating from the sovereign power, in the nature of a grant, either to the whole nation or to a class or portion of the people, or to a dependency, and assuring to them certain rights, liberties or powers.
Industry:Earth science
A channel or trough underground or an inclined trough aboveground, through which ore falls from a higher to a lower level. Also spelled shoot.
Industry:Earth science
A camera not designed specifically for use in photogrammetry.
Industry:Earth science
(1) Any wet, adhesive earth such as mud. (2) An earthy, highly plastic sediment consisting of a considerable amount of hydrous silicates in the form of finely ground colloidal or clay particles.
Industry:Earth science
Law derived from cases, as opposed to law based on statutes or other sources of law.
Industry:Earth science
(1) On a simple curve, the chord, or the length of the chord, that extends from the point where a straight line ends and the curve begins (point of curvature) to the point where the curve ends and its extension in a straight line continues (point of tangency). (2) On a curve composed of two circular arcs, the chord that extends from the point where the two arcs meet either to where the first arc is met by the straight line leading into it, or to where the second arc ends and its extension in a straight-line continues. In descriptions of a circular boundary of land, the length and direction of the long chord are important features.
Industry:Earth science
A period of four Metonic cycles, equal to 76 Julian years or 27 759 days. It was introduced by Callippus, a Greek astronomer, about 350 B. C. as suggested improvement to the Metonic cycle for a period in which new and full moon would recur on the same day of the year. Taking the length of the synodical month as 29. 530 588 days, there are 940 lunations in the Callippic cycle, with about 0. 25 day remaining.
Industry:Earth science
The condition that a point in object space, the corresponding point in image space, and the corresponding perspective center must be collinear (i.e., all lie on the same straight line). This is similar to the co planarity condition, which states a relationship between three lines and one plane. The two types of condition are theoretically equivalent, but it has been found that in practice collinearity conditions are easier to use for solving photogrammetric problems than are co planarity conditions.
Industry:Earth science
A quarter meter pendulum, used by the U. S. Coast and Geodetic Survey, made of aluminum-bronze consisting of one part of aluminum and nine parts of copper. Beginning in 1920, bronze pendulums were replaced by invar pendulums in the gravity work of the U. S. Coast and Geodetic Survey.
Industry:Earth science
