ESE 2021 Technical Quiz :Traversing and Triangulation Survey

Consider the following statements.

(i) In Trilateration method of surveying length of sides of triangle are measured.

(ii) Trilateration is generally used for control surveys.

Which of the following statements are correct?

Match List 1 to List 2 and select the answer using the codes given below.

List 1

(a) Bowditch Method

(b) Arbitrary Method

(c) Transit Method

(d) Axis Method

List 2

(i) Correction are applied to length only.

(ii) Total error is proportional to Latitude/Departure of line.

(iii) Total error is proportional to length of line.

(iv) Based on experience of surveyor on field.

In a traverse ABCDE the error in latitude and departure is observed to be 9.06 mm and 5.23 mm respectively. What is the direction of closing error in degree.

Statement 1: If a line is parallel to one of coordinate axis, correction in bearing as per transit rule will be zero.

Statement 2: Transit rule is used where angular measurement are more precise than linear measurement.

For a closed traverse ABCDE the closing error was found to be 4.32 mm. What will be relative error of closure if the perimeter of traverse is 864 m.