- Branche: 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, ...
An apparatus which creates an enlarged image of the picture on a photographic transparency. Some enlargers allow tilting the surface (easel) onto which the image is projected. If the plane of the photographic transparency can also be tilted, the enlarges is usually called a rectifier.
Industry:Earth science
(1) One of the six orbital elements which specify that elliptical orbit which is tangent to the actual orbit at a particular instant and which the orbiting point mass would follow if the primary were replaced by a point of the same total mass and all perturbing forces were to vanish at that instant. Alternatively, one of the six orbital elements which specify the instantaneous location and velocity of a point mass in its actual orbit. The two definitions are equivalent because the location and velocity at an instant are known if the elliptical orbit is known, and vice versa.
Industry:Earth science
The difference between the true anomaly and the mean anomaly. The difference, in elliptical motion, between the actual location in the orbit and the location the body would have had if motion were uniform.
Industry:Earth science
(1) The meridian 15. 04l07 T east of the meridian of Greenwich, where T is a number equal to the difference, in seconds of time, between ephemeris time and Universal Time. (2) The meridian where the Greenwich mean astronomical meridian would have been if the Earth had rotated uniformly at the rate implicit in the definition of ephemeris time. It is located at 1. 002738 T east of the actual meridian of Greenwich on the Earth's surface.
Industry:Earth science
(1) An astrolabe containing a 60<sup>o</sup> prism for observing celestial bodies at a constant angular elevation of 60<sup>o</sup> rolabe. The term is obsolescent.
Industry:Earth science
(1) One of a set of simultaneous equations equal in number to the number of unknowns.
Industry:Earth science
An inequality (perturbation) in the Moon's motion, having an amplitude of 11' 8. 93" and a period of one anomalistic year.
Industry:Earth science
The application of geology to engineering to ensure that the geological factors affecting determination of route or site, location, design, construction, operation and/or maintenance of the work are recognized and are taken adequately into consideration.
Industry:Earth science
A map showing information essential for planning an engineering project or development and for estimating its cost. An engineering map is usually a large scale map of a comparatively small area or of a route. It may be made entirely from the data gathered by a survey made specifically for the purpose or may be complied from information collected from various sources and assembled on a base map.
Industry:Earth science
A calendar based on the ephemeris second and the ephemeris day, and on an epoch given in ephemeris time.
Industry:Earth science
