SIKKIM PSC AE 2017
⭕ A. Distance from the two stations
⭕ B. Angles from the two stations
⭕ C. Both distance and angles from the two stations
⭕ D. Distance from one station and angle from the other station
📚 Explanation:
When a distant object is visible from two transit stations, it is most practical to locate it using the angles subtended at both stations.
🔹 This method is known as intersection technique in surveying.
🔹 Measuring distances accurately to a faraway object is difficult and prone to error.
🔹 Angular measurement, however, is more reliable using instruments like the theodolite or transit.
✅ Therefore, the method based on angles from the two known stations is preferred over methods involving distances.
When a distant object is visible from two transit stations, it is most practical to locate it using the angles subtended at both stations.
🔹 This method is known as intersection technique in surveying.
🔹 Measuring distances accurately to a faraway object is difficult and prone to error.
🔹 Angular measurement, however, is more reliable using instruments like the theodolite or transit.
✅ Therefore, the method based on angles from the two known stations is preferred over methods involving distances.
👉 Therefore, the correct answer is: B. Angles from the two stations
Key Concepts on Distant Object Location:
- Prefer angular measurements over distances for distant objects
- Known as the intersection method in surveying
- Used in plane table and theodolite surveys
- Ensures accuracy and ease of measurement from transit stations
