KPSC AE – 2016
⭕ A. Method of intersection
⭕ B. Method of interpolation
⭕ C. Method of radiation
⭕ D. Method of traversing
📚 Explanation:
In plane table surveying, plotting inaccessible points is done by the method of intersection.
🔹 This method involves locating points that cannot be directly accessed by sighting from two or more known points.
🔹 The intersection of lines of sight from known stations determines the position of the inaccessible point on the plane table.
🔹 This technique is widely used for plotting points behind obstacles such as rivers or buildings.
In plane table surveying, plotting inaccessible points is done by the method of intersection.
🔹 This method involves locating points that cannot be directly accessed by sighting from two or more known points.
🔹 The intersection of lines of sight from known stations determines the position of the inaccessible point on the plane table.
🔹 This technique is widely used for plotting points behind obstacles such as rivers or buildings.
👉 Therefore, the correct answer is: A. Method of intersection
Key Features of Plotting Inaccessible Points in Plane Table Surveying:
- Uses lines of sight from two or more known points
- Determines positions of points that are not directly accessible
- Based on the principle of intersection of sight lines
- Essential for mapping obstructed or difficult terrain
- Commonly applied in small and medium scale surveys
