- Industry: 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, ...
A distribution involving more than one random variable, i.e., the pattern characteristic of a randomly varying vector of more than one component.
Industry:Earth science
The process of reducing the amount of exposure in certain parts of sensitized material to avoid overexposure in those parts while getting proper exposure in other parts.
Industry:Earth science
A Christian term partly derived from Romans 1:19-20. Paul taught that the existence of the world is proof of the existence of God and of some of his attributes. Further, it teaches that these beliefs are obvious to everyone -- whether they be Christian or not. With advances in science, the existence of the world and its life forms can be explained in naturalistic terms. Thus, the Romans passage does not necessarily apply to contemporary individuals who have become convinced of the reality of evolution.
Industry:Earth science
The distance between the center defined by the index points on the alidade and the center defined by the graduated circle. The index points (on vernier or micrometer microscope) are on the alidade, and any eccentricity of alidade combines with eccentricity of circle to form eccentricity of instrument.
Industry:Earth science
The number of times the amplitude of the Doppler shift in a received signal passes from a negative to a positive value in a specified length of time. The Doppler count is approximately equal to the change in the distance between source and observer during the specified interval of time.
Industry:Earth science
A halftone negative which has received a modified or supplementary exposure so that the extreme highlights or the white background of the artwork will not produce a printing dot on the negative.
Industry:Earth science
A constant value added to all eastings, or from which all westings are subtracted, to produce only positive values.
Industry:Earth science
(1) The partial or total shadowing (obscuration), relative to an observer, of one celestial body by another. The term occultation is used for those eclipses in which some star other than the Sun provides the light, and the light is obscured by the Moon or by some other body in the Solar system. Occultations and eclipses have been used in the determination of longitude and latitude. The principle is the same for either phenomenon. The time at which the Moon's shadow passes a point of known longitude and latitude is measured, as is the time the same part of the shadow passes a second point whose longitude and latitude are to be determined. The difference in times is a function of (a) the differences in longitude and latitude, and (b) the velocity of the Moon's shadow across the Earth's surface. The last of these quantities can be calculated from the data in astronomical ephemerides. Observations of several eclipses give enough data for calculating the longitudinal and latitudinal differences. In the past, the necessary calculation have used the Besselian elements listed in ephemerides and almanacs. (2) The period of time during which one celestial body obscures the light received from another.
Industry:Earth science
(1) A preliminary drawing or layout showing the positions of the illustrations and text as they will appear in the final reproduction. (2) A set of blank pages made up to show the size, shape, and general style of a book, booklet or pamphlet.
Industry:Earth science
The quantity k in the formula F = ½k ρ A v², in which F is the force exerted by a fluid on a moving body, ρ is the density of the fluid, A is the frontal area of the body in the direction of motion and v is the velocity of the body relative to the fluid.
Industry:Earth science
