- 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, ...
Replacement of the density and/or color of each point in an image by a linear combination of those characteristics with the like characteristics of that point's neighbors.
Industry:Earth science
A measuring bar made of Invar. One side of the bar is usually graduated in units of the metric system of units and the other in the English system of units.
Industry:Earth science
The obtaining and use of data from very long baseline interferometers. Often written as VLBI
Industry:Earth science
The invisible image produced in radiation sensitive materials and consisting of those molecules which have absorbed one or more quanta of radiation and are therefore in an excited condition but have not yet changed their chemical nature. When the material is subjected to a process called development, the excited molecules change chemically, agglutinate with other molecules, and create a visible image.
Industry:Earth science
(1) A brass bar inscribed with a 3-foot scale and adopted by Act of Parliament, 1 January 1826, as embodying the legal definition of the yard. The bar was a copy of an earlier bar made by the Royal Society. It was destroyed by fire in 1834. (2) The distance between marks on two golden plugs in a bronze bar at 62<sup>o</sup>F and designated legally to be the Imperial Standard Yard. This standard was constructed to replace the one destroyed by the fire of 1834. It is kept at the Board of Trade in London (1951) and, by the Weights and Measures Act of 1872, defines the British Imperial Yard. A comparison with the International Meter in 1894 gave 1 meter = (39.370113/36) yard. Later measurements in 1927 and 1934 gave 47 and 38, respectively, in the last two places of the numerator, but an evaluation in 1945 concluded that there was no evidence for any change in the Yard in the previous 40 years.
Industry:Earth science
A unit of speed defined (1978) as 1 international nautical mile per hour. The knot was defined previously as 1 nautical mile per hour, but this led to confusion because of the difference between the American and British nautical miles, which differ by 1.184 m. The knot is equal to 1.852 km per hour or 0.5148 meters per second.
Industry:Earth science
A seasonal variation in water level or current, more or less periodic, caused by seasonal changes in air pressure, direction of the wind and other meteorological factors.
Industry:Earth science
