- 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, ...
The product of a force and the interval of time during which that force acts.
Industry:Earth science
A device combining two different parts of a light wave in such a way as to cause interference between the separate parts. The type most used is the Michelson interferometer, in which a single beam of light is split into two parts which are sent over different paths and are then recombined. The Mach-Zender interferometer is a variant of the Michelson interferometer: the medium whose properties are to be examined is inserted in one of the two paths in a Michelson interferometer. Optical interferometers of the Michelson and Fabry-Perot types are used in geodesy for measuring short distances precisely, for measuring the rate of fall of freely-falling prisms, and for measuring flexure in the supports of pendulum apparatus.
Industry:Earth science
The lunitidal interval pertaining to the mean higher high (higher low) waters at the time of tropic tides.
Industry:Earth science
(1) The organization founded in 1921 in Monaco for getting international cooperation on matters affecting hydrography and, in particular, for standardizing charts and oceanic surveys. (2) Since 22 February, 1970, the headquarters of the International Hydrographic Organization. The offices remain those of the previous International Hydrographic Bureau in Monaco.
Industry:Earth science
A contour line made thicker to distinguish it from the contour lines on either side of it, and occurring at a multiple of the basic contour interval. Depending on the size of the contour interval, index contour lines are drawn as every fourth or fifth contour line, and usually with the corresponding elevation shown in a gap in the line. Sometimes incorrectly called an index contour.
Industry:Earth science
The ellipse defined by specified values of the Keplerian elements of an orbit at a specific time.
Industry:Earth science
A document or other writing made and executed as the expression of some act, contract, or legal proceeding. Usually referred to, in legal matters, simply as instrument. However, where the word is used in two or more senses (as in the present glossary), the term legal instrument is preferred.
Industry:Earth science
A temperature scale, introduced in 1927 and revised in 1948 (symbolized as ITS 48) based on six defined points (conditions):<br>
Industry:Earth science
Since 22 February 1970, the organization succeeding to the International Hydrographic Bureau and carrying on the work of that Bureau, with some additional objectives such as development of the sciences of hydrography and descriptive oceanography. The headquarters of the organization is called the International Hydrographic Bureau and is located in Monaco.
Industry:Earth science
