What is Bowditch’s rule used for in surveying?
- ATo correct the lengths of sides in a traverse based on observed angles
- BTo distribute the closure error proportionally between the latitudes and departures in a traverseCorrect
- CTo calculate the area of a closed traverse
- DTo adjust angles in a triangular network
Solution
Concept
Purpose of Bowditch's rule in surveying
Formula
NONE
Step-by-step solution
1. Bowditch's rule is an analytical method used to adjust latitudes and departures in a traverse survey. Answer: B
Explanation
Bowditch's rule is a standard balancing method used in closed traverse surveying when linear and angular measurements have similar precision. The rule distributes the total closure error in latitude and departure in direct proportion to the length of each traverse line relative to the total perimeter. Therefore, option B correctly describes the primary function of Bowditch's rule.
Why the other options are wrong
A) Bowditch's rule is not used solely for correcting side lengths based on angles. D) Bowditch's rule is used for traverse adjustments, not adjusting angles in a triangular network.
Shortcut
Bowditch Rule = Distributes traverse closing error proportionally between latitudes and departures.
Common mistake
Confusing Bowditch's rule for balancing linear closure errors with angular correction rules or area calculations.
Correct answer: B) To distribute the closure error proportionally between the latitudes and departures in a traverse