DICT.TW Dictionary Taiwan

 tri·an·gu·la·tion /(ˌ)traɪˌæŋgjəˈleʃən/
 三角測量,分成三角形

 Tri·an·gu·la·tion n.  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.
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 triangulation
      n 1: a trigonometric method of determining the position of a
           fixed point from the angles to it from two fixed points
           a known distance apart; useful in navigation
      2: a method of surveying; the area is divided into triangles
         and the length of one side and its angles with the other
         two are measured, then the lengths of the other sides can
         be calculated