- 行业: 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, ...
The determination of the presence and location of layers of solid rock, the detection and identification of minerals, the classification of solids and underlying strata and so on, by measurements of gravity, the speed of sound in the ground, electrical resistivity of the ground and other physical measurements.
Industry:Earth science
A topographic feature with elevations referred to the geoid.
Industry:Earth science
(1) That side of a negative or photographic plate which has the emulsion on it. (2) That side of a printing plate which does the actual printing. (3) That side of a leveling rod which has graduations on it or which carries the graduated side of a scale. (4) The end wall of a drift, cross cut or a bed (of deposit)
Industry:Earth science
The exception, from the description of land, from a previous exception. Doubled exceptions should always be avoided. Lot A, except the east 50 feet, except the south 50 feet conveys two meanings: 1) Lot A, except the easterly 50 feet of all of Lot A and except the south 50 feet of Lot A and 2) Lot A, except the east 50 feet of all of Lot A, except that the south 50 feet of the east 50 feet is reserved by the grantor. In a doubled exception, the second exception may refer to the exception or to the lot.
Industry:Earth science
Electromagnetic distance measuring equipment containing an electro infrared distance measuring instrument as one component. Some geodesists consider it to be electro optical distance measuring equipment.
Industry:Earth science
The reciprocal of the length of time of exposure, expressed in meter candle seconds, at the point on the toe of the characteristic curve where the slope equals 0.6 gamma when recommended conditions for processing are used.
Industry:Earth science
A fault in which the movement is parallel to the fault plane as it intersects the horizon.
Industry:Earth science
An error produced by irregular causes whose effects upon individual measurements are governed by no known law connecting them with circumstances and which therefore can never be subjected to computation a priori. Sometimes called an irregular error or, more commonly, an accidental error. The theory of elemental errors assumes that a random error is assumed to be composed of an infinite number of independent, infinitesimal errors, all of equal magnitude, each as likely to be positive as negative. In practice, a random error is composed of an indefinitely large number of finitely small errors, each as apt to be positive as negative. With these assumptions, probabilities can be associated with the results of the method of least squares, and it is to the elimination of random errors only that the method of least squares properly may be applied.
Industry:Earth science
