- 行业: Earth science
- Number of terms: 93452
- Number of blossaries: 0
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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, ...
The quantity, usually denoted by BC, added to an absolute (visual) magnitude M <sub>v</sub>
Industry:Earth science
A number expressing the average gradient of a graph of photographic density versus exposure in terms of the slope of a straight line joining the two points, on the characteristic curve, which represent the minimal and maximal densities used in practice. For materials of high contrast, the contrast index is almost the same as gamma.
Industry:Earth science
Any characteristic of the tide which remains practically constant at a particular locality. Tidal constants are classified as harmonic or non-harmonic.
Industry:Earth science
(1) A precisely defined region of the celestial sphere, associated with a stellar grouping, which the International Astronomical Union has designated as a constellation. (2) A stellar group, usually with pictorial or mythical associations, which serves to identify a region of the celestial sphere. (3) A set of satellites placed in simultaneous orbits to form a particular pattern.
Industry:Earth science
A private agreement restricting the use and occupancy of real estate which is a part of the conveyance and is binding on all subsequent purchasers. Such covenants may deal with control of the size, set-back and/or placement of buildings, architecture or cost of improvements.
Industry:Earth science
A method of resection in which lines A,B,C are drawn through the plotted and observed points, on a plane table, to give intersections 1 of A with B and 2 of B with C. The hori-zontal motion of the plane table is loosened and the table rotated slightly. The process is repeated to give points of intersection 1 and 2'. The desired point is at the intersection of lines 11 and 22'. The method was devised by Sergeant Cucunuitti, of the Mexican Army, in 1592.
Industry:Earth science
The decrease in the capital stock that results from wear and tear and obsolescence. The periodic allocation of the cost of a tangible long-loved asset (other than land and natural resources) over its estimated useful life.
Industry:Earth science
Remove the errors present in an algorithm intended to be used by a computing machine.
Industry:Earth science
The small items or particulars of information shown on a map by lines, symbols and lettering which, when considered as a whole, furnish the comprehensive representation of the physical and cultural features. The fewer the details, the more generalized the map.
Industry:Earth science
