Question

Explain the graphical method of solving three point problem.

Answer 1

SOLUTION OF THREE POINT PROBLEM BY GRAPHICAL METHOD ( BESSEL'S METHOD)

If the area to be surveyed is large, whole area cannot be completed at a stretch. The survey work is closed at some point and restarted from the same. Sometimes these points are lost and to continue the work we have to find the instrument station on the previously drawn plan. To do this three point problem is solved. It consists of finding the instrument station on the plan by sighting three well defined objects whose position is already fixed in plan.