Common in SSC JE, GATE, RRB JE, and Diploma Surveying Exams
⭕ A. Resection
⭕ B. Orientation
⭕ C. Traversing
⭕ D. Resection and orientation
📚 Explanation:
The Two Point and Three Point Problems are classical methods in Plane Table Surveying used for both Resection and Orientation.
🔹 Resection is used to determine the unknown location of the instrument station on the map by sighting known control points.
🔹 These methods also assist in orienting the table to match the plotted map with the actual field direction.
🔹 The Two Point Problem uses two known points for estimating position and orientation.
🔹 The Three Point Problem gives more accurate results and involves three known points.
The Two Point and Three Point Problems are classical methods in Plane Table Surveying used for both Resection and Orientation.
🔹 Resection is used to determine the unknown location of the instrument station on the map by sighting known control points.
🔹 These methods also assist in orienting the table to match the plotted map with the actual field direction.
🔹 The Two Point Problem uses two known points for estimating position and orientation.
🔹 The Three Point Problem gives more accurate results and involves three known points.
👉 Therefore, the correct answer is: D. Resection and orientation
Key Points on Two & Three Point Problems:
- Two point method – approximate solution for locating plane table using 2 known points
- Three point method – accurate orientation and location using 3 known reference points
- Used in resection to determine plane table location
- Also helps in orienting the table to ground reality
- Fundamental in graphical methods of survey
