- Industria: 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, ...
Data processing in which the data are submitted to the computer as separate sets. The computer operates on the sets in sequence, combining the results of operating on a particular set with the data of the next set and operating on the combination of results and new data. If the amount of data is very large, sequential processing may have to be used.
Industry:Earth science
An astrolabe designed by A. Danjon and based on the double image astrolabe of Claude and Driencourt, but having the images side by side and having a motor driven prism. The Claude and Driencourt astrolabe splits light from a star nearing 30<sup>o</sup> zenith distance to give two images in the focal plane. As the star approaches 30<sup>o</sup> zenith distance, the two images approach each other along diagonal lines intersecting on the optical axis, and coincide when the zenith distance is exactly 30<sup>o</sup>, at which point the time is recorded. In the Danjon astrolabe, a double Wollaston prism is placed at the focus. This, together with some screens, produces two images side by side if the prism is placed at the proper distance from the focal plane. The images are kept side by side by a motor that moves the prism uniformly along the optical axis. The zenith distance over a short interval about 30<sup>o</sup> is therefore measured by the distance of the prism from the focal plane. The observer need merely make small corrections to the distance from time to time.
Industry:Earth science
An entire mountainous province, including all the subordinate ranges and groups and the plateaus and basins in the interior.
Industry:Earth science
A survey line run between two or more stations on a traverse to produce a closed traverse of that part of the survey.
Industry:Earth science
An option strategy involving the holding of an asset and sale of a call on the asset.
Industry:Earth science
A tidal constituent which modulates the amplitude and frequency of the principal lunar and principal solar diurnal constituents for the declinational effects of the Moon and Sun, respectively. It has a period of 11. 97 hours and an angular speed of 30. 0821 degrees per hour. Its symbol is K2; the Doodson number is 275. 555.
Industry:Earth science
A particularly sturdy leveling - instrument sufficiently accurate for leveling over short distances such as those involved in construction of roads, buildings, etc.
Industry:Earth science
That point to which light entering a telescope is focused by bringing the light through the declination axis and the polar axis.
Industry:Earth science
A system by which control surveys are labelled to indicate their approximate precision or accuracy. The highest prescribed order of control survey, in the USA, is designated first order; the next lower is designated second order; the lowest third order. The second order and third order categories are further subdivided into classes I and II, with class II being in each case the category containing the less precise surveys. The term fourth order control survey is also used but its definition is not as precise as the definitions of the higher order control surveys. In general, a fourth order control survey is one which fails to meet the criteria necessary for inclusion in one of the higher orders.
Industry:Earth science
A measure of volume defined legally, in the United States of America, as a pile or stack equivalent to 128 cubic feet of wood and air-space (3,625 cu. M. ) closely ranked, usually 8 feet long, 4 feet high and 4 feet wide. A one-foot length of such a pile is called a cord-foot, which is 16 cubic inches.
Industry:Earth science
