- 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, ...
Points or lines which occur on the overlapping portions of two photographs having different perspective centers and are images of the same point or line in the object.
Industry:Earth science
One of the following six orbital elements specifying an orbit:<br />
Industry:Earth science
The formula mh = ± (a + b tan β) for the standard deviation mh of the error in representing elevations, on a map, as a function of β, the angle giving the slope of the terrain. a and b are constants depending on the error of measurement and on the scale of the photographs from which the map was prepared.
Industry:Earth science
A tripod designed particularly for supporting a plane table, having a ball-and-socket joint clamping the plane table in a suitable position. After about 1887, the Johnson tripod replaced an earlier support which had folding wooden legs fastened to the plane table.
Industry:Earth science
A quasi-geodetic datum based on the Everest spheroid, with the origin at triangulation station Kalianpur:<br>
Industry:Earth science
One of the images, on two or more photographs, of the same point in object space.
Industry:Earth science
The interval of time between the transit of the Moon over the Greenwich meridian and over a local meridian. The lunar interval equals the difference between the Greenwich and local intervals of a phase of the tide or tidal current. The average value of this interval, in hours, is -0.069 λ, where λ is the local longitude in degrees.
Industry:Earth science
A stereoscopic plotting instrument capable of projecting only one stereoscopic model at a time. Such a plotting instrument is intended for compilation only and depends on supplementary techniques to do stereo-triangulation.
Industry:Earth science
(1) Determination of a value intermediate between given values, from some known or assumed rate or system of change of values between the given ones. Equivalently, determination of the value of a function y = f(x) for some arbitrarily specified value of x, given values (y <sub>1</sub>, x <sub>1</sub>) and (y <sub>2</sub>, x <sub>2</sub>) such that the arbitrary value of x lies between the two given values. (2) The process or technique of obtaining an estimate of the value of a quantity at a specified time t, given that data useful for obtaining the estimate are available for times both before and after t. This definition seems to be part of the jargon of control engineering, in which it is called smoothing.
Industry:Earth science
A process in which the price level is rising and money is losing value.
Industry:Earth science
