Question

Which of the following crime scene measurement and sketching method requires use of compass for angle measurement ?

• A. Triangulation method
• B. Baseline method
• C. Rectangular coordinates
• D. Polar coordinates

Hint:

Polar method = Distance + Angle → Always remember: Angle measurement needs a compass.

Answer 1

The Correct Option is D

Concept: Crime scene measurement methods are used to accurately record the position of evidence. Different methods rely on distances, angles, or a combination of both. The use of a compass is specifically associated with measuring angles relative to a fixed reference direction.

Step 1: Understanding Polar Coordinate Method.
In the polar coordinate method, the position of an object is determined using:
• A fixed reference point
• Distance from that point
• Angle from a reference direction (usually north) Since angle measurement is involved, a compass is required.

Step 2: Understanding other methods.

• Triangulation Method: Uses distances from two fixed points, no angles required.
• Baseline Method: Uses a straight baseline and perpendicular distances.
• Rectangular Coordinates: Uses right angles and linear measurements only.

Step 3: Identifying the correct option.
Only the polar coordinate method requires angular measurement using a compass. Final Conclusion:
Hence, the correct answer is (4) Polar coordinates.