- Отрасли: 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 method of rectification by first computing the amount of tilt present in an aerial photograph and then, using this result to compute the settings needed on an autofocus rectifier. The photograph is then rectified without further comparison with a templet or other guide.
Industry:Earth science
A hyperbolic radio navigation system with a baseline only 5 - 6 km long, operating at a frequency of about 300 kHz. It uses three radiators to generate two daisy shaped patterns which are slowly rotated and also switched alternately. The signal consists of coded dots and dashes. Because the baseline is so short, Consol should not be used at distances of less than about 50 km from the baseline. The usable range is about 900 to 1800 km during daytime; it is more at night. During the day, the error in direction is about 0. 6<sup>o</sup> at an angle of 60<sup>o</sup> to the baseline. The error in location is a few kilometers, depending on distance from stations, diurnal effect, propagative constants, etc. The system was originally developed under the name Sonne and is still in limited used, mainly by shipping (in 1977 there were 13 stations in operation).
Industry:Earth science
The court's decision in equity. A decree usually directs a defendant to do or not do some specific thing, as opposed to a judgment for damages in a court of law. The same court may ordinarily sit either as a court of equity or a court of law.
Industry:Earth science
A line connecting two points on the surface of the rotational ellipsoid in such a manner that at every point, the azimuths of the two end points of the line differ by exactly 180<sup>o</sup>. A curve of alinement is a line of double curvature slightly less in length than the normal section lines connecting its end points.
Industry:Earth science
A precise camera used for making photo-graphic copies of documents, pictures, etc.
Industry:Earth science
A diagram showing the frequency of occurrence of groups of elevations over the entire world.
Industry:Earth science
A vernier lying in physical contact, or nearly so, with the primary scale. This is the type usually meant by vernier.
Industry:Earth science
(1) An angle calculated from gravimetric measurements using Vening Meinesz's formula for the deflection of the vertical or some variant of that formula. This angle is theoretically related to the deflection of the vertical (1), and is nearly the same as that given in the following definition. (2) The angle ζ', at a point P' which is on the geoid and is vertically below the point P on the Earth's surface, between the actual vertical through that point and the vertical through it from an equipotential surface of reference. The gravimetric deflection of the vertical is sometimes called the absolute deflection of the vertical or absolute gravimetric deflection of the vertical. Helmert called it the divergence of the vertical.
Industry:Earth science
A region lying between the shoreline and either (a) a line 50 nautical miles from shore or (b) the contour at a depth of 100 feet.
Industry:Earth science
நிலப்பரப்பின் அடியில் நிலத்தடி நீரை ஓர் குறிப்பிட்ட இடத்தில் உள்ளே போக விடாமலும், அல்லது குறைந்த உட்புகவிடு தன்மை கொண்ட ஒரு பொருள், நிலத்தடி நீரின் கிடைநிலை அசைவுகளை தடை செய்வதால், அதன் எதிர்பக்கத்து நிலத்தடி நீர் மட்டத்தின் அளவு கணிசமாக வித்தியாசத்துடன் காணப்படுவது.
Industry:Earth science
