- Branche: 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 map separate from a larger map but positioned within the neat line of that map. Three forms are recognized: (a) an inset depicting a region geographically outside that depicted on the larger map but included for convenience of publication and usually at the same scale (e.g., insets of Alaska and the Hawaiian Islands on a map of the USA); (b) a portion of the map at an enlarged scale (e.g., an inset showing Chicago on a map of Illinois); and (c) a map, at a smaller scale, of the region within which that depicted by the larger map lies (e.g., inserts showing designations of maps adjoining the one on which the inset appears)
Industry:Earth science
That part of computer's memory into which numbers or numerically-coded information can be placed and later retrieved independently of the order in which the numbers were placed there. Usually referred to as RAM.
Industry:Earth science
The traverse aspect of a particular map projection.
Industry:Earth science
That optical reconstruction of a region produced by viewing a stereoscopic pair of photographs through a stereoscope and showing depth.
Industry:Earth science
(1) A navigation system in which gyroscopes or accelerometers are used to provide a coordinate system having a fixed orientation with respect to the distant galaxies and accelerometers to provide (by double integration) changes in location within that coordinate system. The gyroscopic compass is a particularly simple form of an inertial navigation system. A more complicated form giving not only orientation but location, and used for navigating ships, is called SINS (Ships Inertial Navigation System). (2) A navigation system not dependent on artificial sources of electromagnetic radiation for signals. This definition is not particularly useful; it includes navigation systems such as the lead line, the sextant and so on.
Industry:Earth science
A line along which the rates of change of the values of two intersecting families of hyperbolae are constant
Industry:Earth science
A map complying with the U.S. National Map Accuracy Standards.
Industry:Earth science
A survey made to mark the legal boundaries of mineral deposits or ore-bearing formations in the public domain, where the boundaries are to be determined by lines other than those of the normal subdivision of the public lands.
Industry:Earth science
A filar micrometer so placed that its moving filament moves in the focal plane of a microscope. Readings made on a graduated circle by using a microscope micrometer are highly precise and accurate. The micrometer is adjusted so that an even number of turns will carry the filament exactly the distance between adjacent marks on the circle. Any intermediate point on the circle can be read by interpolation. If the adjustment is imperfect, the amount by which an even number of turns of the screw fails to carry the line exactly the distance between marks is treated as a systematic error known, preferably, as the run of micrometer. The term correction for run of micrometer is also acceptable.
Industry:Earth science
