# trilateration

## trilateration

[trahy-lat-uh-rey-shuhn]
noun Surveying.
a method of determining the relative positions of three or more points by treating these points as vertices of a triangle or triangles of which the angles and sides can be measured.

Origin:
trilater(al) + -ation

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To trilateration
Collins
World English Dictionary
 trilateration (ˌtraɪlætəˈreɪʃən) —n a method of surveying in which a whole area is divided into triangles, the sides of which are measured, usually by electromagnetic distance measuring for geodetic control or by chain survey for a detailed survey

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Dictionary.com's 21st Century Lexicon
 Main Entry: trilateration Part of Speech: n Definition: a method of surveying in which triangle sides are measured, usually by electronic means; cf. triangulation Etymology: tri 'triangle' + latus 'side' + -ation
Dictionary.com's 21st Century Lexicon
Cite This Source
Encyclopedia Britannica
Encyclopedia

trilateration

method of surveying in which the lengths of the sides of a triangle are measured, usually by electronic means, and, from this information, angles are computed. By constructing a series of triangles adjacent to one another, a surveyor can obtain other distances and angles that would not otherwise be measurable. Formerly, trilateration was little used in comparison to triangulation, a method for determining two sides and an angle of a triangle from the length of one side and two angles, because of the difficulty of the computations involved. But the development of electronic distance-measuring devices has made trilateration a common and preferred system. Except that only lines are measured, while all angles are computed, the field procedures for trilateration are like those for triangulation.