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Q: Among the following triangulations, which has the highest order and most precise control points?
  • A. First order
  • B. Fourth order
  • C. Third order
  • D. Second order
Correct Answer: Option A - Primary/1st order triangulation– • A first order triangulation is the highest-order triangulation and is employed for very large areas, for example, for the earth's figure, for obtaining the most precise control in mapping and for small-scale mapping. • Average triangle closure-less than 1 second. • Maximum triangle closure-not more than 3 second
A. Primary/1st order triangulation– • A first order triangulation is the highest-order triangulation and is employed for very large areas, for example, for the earth's figure, for obtaining the most precise control in mapping and for small-scale mapping. • Average triangle closure-less than 1 second. • Maximum triangle closure-not more than 3 second

Explanations:

Primary/1st order triangulation– • A first order triangulation is the highest-order triangulation and is employed for very large areas, for example, for the earth's figure, for obtaining the most precise control in mapping and for small-scale mapping. • Average triangle closure-less than 1 second. • Maximum triangle closure-not more than 3 second