- 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, ...
A return objective in which the investor seeks to generate income rather than capital gains; generally a goal of an investor who wants to supplement earnings with income to meet living expenses.
Industry:Earth science
One of a pair of coordinates in a standard coordinate system.
Industry:Earth science
A coordinate system based on a polyconic map projection and used formerly by the United States Army for fire control.
Industry:Earth science
The legal process by which a property owner may claim and receive compensation for the taking of, or payment for damages to, his property as a result of work on a highway.
Industry:Earth science
One of the three coordinates in a topocentric equatorial coordinate system.
Industry:Earth science
A curve composed of two or more simple curves which deflect in the same direction and are tangent at the points where they join.
Industry:Earth science
A region, at depths of 17 to 20 km under some parts of the continents, in which the speed of seismic P waves increases abruptly from about 6. 2 km/s to about 6. 6 km/s. Unlike the deeper, Mohorovicic discontinuity, the Conrad discontinuity seems to be absent over large regions. It may mark the contact of granitic and basaltic layers.
Industry:Earth science
(1) The location of a heavenly body at the instant it crosses an observer's meridian above or below his horizon. (2) For a heavenly body which is continually above the horizon, the location of lowest apparent angular elevation. Culmination occurs when the body transits the local meridian: upper culmination at the branch of the meridian above the celestial pole; lower culmination at the branch below the celestial pole. As an observer approaches a pole of the earth, culmination of the fixed stars becomes less noticeable, disappearing when the pole is reached. Culmination of bodies within the Solar System may, under some conditions, be obscured by changes in declination. At one time, lunar culminations were used extensively in determining astronomic longitude.
Industry:Earth science
(1) The calculation of correlation coefficients by an optical method. (2) The determination of the correlation between the image on a photograph taken some time previously, and the image on a new photograph, on the screen of a television set, or in a telescope. The method is used to provide information on location of an aircraft, to check an aerial guidance system, and for other purposes.
Industry:Earth science
