Triangulation (surveying)
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In surveying, triangulation is the process of determining the location of a point by measuring only angles to it from known points at either end of a fixed baseline by using trigonometry, rather than
Triangulation of Kodiak Island in Alaska in 1929.
Liu Hui (c. 263), How to measure the height of a sea island. Illustration from an edition of 1726
Gemma Frisius's 1533 proposal to use triangulation for mapmaking
Trilateration
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Trilateration is the use of distances for determining the unknown position coordinates of a point of interest. When more than three distances are involved, it may also be called multilateration, for e
Triangulation (surveying)
…angles to it from known points at either end of a fixed baseline by using trigonometry, rather than measuring distances to the point directly as in trilateration. The point can then be fixed as the third point of a triangle with one known side and two known angles. Triangulation can also refer to the accurate…
Trilateration in three-dimensional geometry