- 行业: Earth science
- Number of terms: 93452
- Number of blossaries: 0
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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 force introduced into a relative coordinate system to satisfy Newton's laws as expressed in that system. E.g., centrifugal force.
Industry:Earth science
Any natural field of force, such as a gravitational or magnetic field.
Industry:Earth science
A quantity introduced into an equation or description to account for the behavior of a body, but which can be dispensed with by using a different coordinate system for the equations or a different viewpoint in the description. The Coriolis force and centrifugal force are typical of such forces.
Industry:Earth science
The spiral given by the equation r² = kθ, in which r and θ are polar coordinates and kis a constant.
Industry:Earth science
A location calculated while work in the field is in progress, to determine whether or not the measurements are acceptable or to provide a preliminary location for other purposes.
Industry:Earth science
(1) The path taken by an airplane during an aerial survey. (2) The line, drawn on a map, representing the path followed by an airplane while taking aerial photographs. (3) A line drawn on a map to represent the track of an aircraft.
Industry:Earth science
A map or tracing made in the field and showing corrections for subsequent reproduction of a map.
Industry:Earth science
A piece of land set aside for the testing or firing of missiles.
Industry:Earth science
The approximate sf to the standard deviation of the angles in a triangulation network, according to the formula sf = ( ( Σ εn²) / 3N)½ , in which εn is the misclosure, in angle, of triangle n and N is the number of triangles in the network. The formula was developed by General Ferraro as a measure of the accuracy of a network. It is widely used as an estimate of the accuracy when only misclosures of triangles are available.
Industry:Earth science
An individual exposure contained in a continuous sequence of photographs.
Industry:Earth science
