This document provides an overview of plane table surveying. It describes the equipment used, which includes the plane table, alidade, U-fork with plumb bob, spirit level, compass, and drawing paper. It explains the working operations of plane table surveying, which involves fixing the plane table to the tripod, leveling it, centering it over survey points, and orienting it. Finally, it outlines several methods of plane table surveying, including radiation, intersection, traversing, resection, and solving two-point and three-point problems.

1. DR. K. N. MODI UNIVERSITY
Newai, Rajasthan
DEPARTMENT OF CIVIL
ENGINEERING
Created By:-
Bimlesh Thakur

2. Content
• Introduction of plane Table Surveying.
• Equipment Used in Plane Table Surveying.
• Working operations of Plane Table Surveying.
• Method of Plane Table Surveying.
• Two point Problem.
• Three point Problem.

3. Plane Table Surveying
• Plane Table Surveying is a graphical method of
survey in which the field observations and
plotting process simultaneously.

4. Equipments Used in Plane Table
Surveying.
The plane table
Alidade
U-Fork with Plumb bob
Spirit Level
Compass
Drawing Paper

5. The Plane table
A plane table is made of wooden or plywood and it is normally
rectangular in shape. The size of plane table is 60cm*70cm.
There are three types of Plane table:-
1) The traverse table
2) Johnson table
3) The coast survey table

6. Tripod
• The plane table is mounted on a tripod
• Tripod is provided with three foot screws at its
top for leveling of the plane table.

7. Alidade
• The alidade is useful for establishing a line of
sight.
• There are two Types of alidade.
1. Plane alidade 2. Telescopic alidade

8. U-Fork with Plumb bob
• U-fork with plumb
bob is used for
centering the table
over the point or
station occupied by
the plane table when
the plotted position of
that point is already
on the sheet.

9. Spirit Level
• The Table is leveled by placing the level on the
board in two positions at right angles and
getting the bubble central in both positions.

10. Compass
• The compass is required for drawing the line
showing magnetic meridian on the paper. It is
used to orient the table to the magnetic
meridian.

11. Drawing Paper
• Drawing paper is used for plotting the ground
details.

12. Working operations of Plane Table
Surveying.
i. Fixing
 Fixing the plane table on the tripod stand
ii. Setting
 Leveling
 Centering
 Orientation

13. Leveling
• Place the table over the station-point and
spread out legs to make it level and at a
convenient height, preferably not above the
elbow. Centering
• The point on the paper representing the
station being occupied should be vertically
over the point on the ground. This operation is
known as centering of the table.
Orientation
• The table is said to be oriented when it is so
placed that all lines on the paper are parallel
to the corresponding lines on the ground.

14. Methods Of Plane Tabling
1. Radiation
2. Intersection
3. Traversing
4. Resection
I. Compass Method
II. Back-ray Method
III. Two-point problem
IV. Three-point problem

15. Radiation

16. Intersection

17. Traversing

18. Two point Problem

19. Three point Problem

20. THANK YOU