- 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, ...
The perpendicular from the center of a regular polygon to one of the sides. Also spelled apothegm.
Industry:Earth science
A prismatic astrolabe in which the prism directs the line of sight at a 45° angle to the horizontal.
Industry:Earth science
A continuous mound of material, behind the beach, which has been heaped up by the action of waves carrying the material of the beach farther inland.
Industry:Earth science
The adjustment of the values of geodetic constants, particularly those (length, angle, direction, coordinates) that characterize a geodetic network.
Industry:Earth science
An astronomic azimuth taken as the astronomic azimuth of a side in second order (secondary) or lower triangulation.
Industry:Earth science
The limit, as T approaches infinity, of (1/2T) times the integral of f(t) f(t - τ)dt from T to +T; τ is a parameter.
Industry:Earth science
A ring made to fit snugly over a compass or compass repeater and provided with a means for observing bearings and azimuths.
Industry:Earth science
(1) The angle, at the center of a circular arc, included between the radii which pass through the beginning and end of the arc. This angle is equal in size to the change in direction of the tangents at the beginning and end points. In alinement surveys, it is commonly called the delta angle and denoted by <font face = symbol>D</font>. (2) The angle, in curved lines containing segments of compound curves, or spirals and circular curves, between the radii to the beginning and end points or between the tangents at these points. The central angle of a spiral is called theta (<font face = symbol>q</font>) or delta (<font face = symbol>D</font>).
Industry:Earth science
