- Industry: 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, ...
(1) A thing or property granted; a gift. In particular, (2) A tract of land, a monopoly or the like granted by the government.
Industry:Earth science
A narrow, deep valley with nearly vertical, rocky walls, inclosed by mountains. It is smaller than a canyon and more steep sided than a ravine.
Industry:Earth science
A correction to gravity, needed to account for attraction by the terrain (topography). It is closely related to the topographic gravity correction and is sometimes used as a synonym for that correction.
Industry:Earth science
(1) A function which is nearly zero over most of the domain of its argument x, but is finite and not zero within a small interval about some specific value of x. The Dirac function is a sampling function, as is (sin x)/x. (2) The function (sin x)/x. This function has the value 1 at
Industry:Earth science
(1) The amount of clumping together of silver grains resulting from chemical development. (2) A measure of the average size of clumps of silver resulting from chemical development.
Industry:Earth science
The angle between the grid meridian and the geodetic meridian. Gisement is sometimes called the declination of grid north and reckoned east and west from geodetic north. The term is used principally, in the USA, with military grids and is not used with the State Plane Coordinate Systems, in which the corresponding angle on the grid used with the transverse Mercator map projection is the convergence of the local meridian with the central geodetic meridian. In the grid associated with the Lambert map projection, the angle is known as the mapping angle. It was formerly designated by è and called the theta angle.
Industry:Earth science
(1) The sphere upon which lie the points to be mapped, by perspective projection, onto the plane. The radius of the generating globe bears the same relationship to the radius of the Earth as does a distance on the map to the corresponding distance on the representing ellipsoid (as indicated by the scale of the map). (2) An ellipsoid whose characteristic dimensions bear a specified ratio to the corresponding dimensions of an ellipsoid representing the Earth; the ratio is chosen to be close to the scale at which the Earth is to be mapped.
Industry:Earth science
A line 5/8 inch below the top of the center line of the head of a running rail or the corresponding location of other types of track and taken along that side nearer the center of track.
Industry:Earth science
A person who transfers property by deed or grants property rights through a trust instrument or other document.
Industry:Earth science
