Terminology used in Surveying

Question 1

Accuracy

Answer 1

Nearness of value to true value

Question 2

Precision

Answer 2

Nearness of value to other values in same set

Question 3

Measurement Error

Answer 3

difference between measured value and the quantity’s true value

Question 4

Blunder

Answer 4

Error caused by incorrect measurement using prescribed technique (ie rod height)

Question 5

Systematic Errors

Answer 5

Errors caused by physical laws (ppm, temp, heat waves, etc)

Question 6

Random Errors

Answer 6

Could be human or instrument, they are differences that remain after blunders and systematic errors have been removed