\Tri*an`gu*la"tion\, n. [Cf. F. triangulation.]
(Surv.)
The series or network of triangles into which the face of a
country, or any portion of it, is divided in a
trigonometrical survey; the operation of measuring the
elements necessary to determine the triangles into which the
country to be surveyed is supposed to be divided, and thus to
fix the positions and distances of the several points
connected by them.