GPSC AE (Class 1 & 2) – 2019
⭕ A. determining the position of three points
⭕ B. locating the station occupied by plane table given the position of the three points
⭕ C. locating the position of two points given the position of the third points
⭕ D. surveying a triangular area
📚 Explanation:
The three-point problem in plane tabling is used to determine the location of the station occupied by the plane table.
🔹 Given the positions of three known points in the field, the surveyor locates the plane table’s position by plotting these points.
🔹 This helps in accurate plotting and orientation of the survey.
🔹 The method is essential for fixing the instrument station accurately in the field.
The three-point problem in plane tabling is used to determine the location of the station occupied by the plane table.
🔹 Given the positions of three known points in the field, the surveyor locates the plane table’s position by plotting these points.
🔹 This helps in accurate plotting and orientation of the survey.
🔹 The method is essential for fixing the instrument station accurately in the field.
👉 Therefore, the correct answer is: B. locating the station occupied by plane table given the position of the three points
Key Features of the Three-point Problem in Plane Tabling:
- Determines the exact location of the plane table station
- Uses positions of three known points in the field
- Ensures accurate survey orientation and plotting
- Essential for proper station setup in plane table surveying
- Helps maintain accuracy and reduces errors in the field
