- 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, ...
A mark whose astronomic azimuth from a station which is also a Laplace station is known.
Industry:Earth science
A topographical map upon which the planimetric detail is shown photographically in its correct position. It is usually made from convergent photographs, although conventional aerial photographs can be used.
Industry:Earth science
A simple metallic tube containing (a) a prism; (b) a sliding eyepiece in which is mounted half of a convex lens dividing the field of view into a right half and a left half. In the top of the tube and just above the prism is a hole through which can be seen an adjustable cross-wire and the bubble of a level.
Industry:Earth science
A cumulative graph of the amount of earth moved from one place to another.
Industry:Earth science
A map with relief depicted by systematic application of a standardized set of conventional, pictorial symbols based on the simplified appearance of the physical features they represent, as viewed obliquely from the air at an angular elevation of about 45<sup>o</sup>. Compare with the definition of morphographic map.
Industry:Earth science
A mounting, for an aerial camera, consisting of a fixed mounting to which is added a ring and motor which rotates the camera about its optical axis.
Industry:Earth science
A system of units, devised by G. Giorgi, in which the fundamental units are: the kilogram (for mass), the meter (for length), the second (for time) and an electromagnetic unit, commonly the coulomb (for electrical charge). In an M.K.S. system, the volt and the ampere are derived units. The M.K.S. system is the forerunner and prototype of the Systém International d'Unitès (SI).
Industry:Earth science
A period of 235 lunations (about 19 years). Devised by the Athenian astronomer Meton (c. 450 B.C.) for obtaining a period in which new and full moon would recur on the same day of the year. Taking the Julian year of 365.25 days and the synodic month as 29.530 588 days, the 19-year period is 6939.75 days long, as compared with the 235 lunations of 6939.69 days, a difference of only 0.06 days.
Industry:Earth science
Any map designed for a special purpose rather than for general use. Usually the information on a special purpose map is emphasized by omitting or subordinating other information of a general character. A word or phrase, such as geological, road or traffic-flow, for example, is usually used to describe the type of information a special-purpose map is designed to present.
Industry:Earth science
