for civil engineers

1. Plane table Surveying
UMER GULZAR
GHAZANFAR ALI MAHER
A
Presentation on
Presented By:
Under the guidance of :
Engr.Ahsan Rehman Khan
Department of Civil Engineering nTechnology
NFC IET MULTAN UNiversity
Roll No. 2k17-civil-37

2. CONTENTS

3. PROCEDURE OF SETTING UP A PLANETABLE OVER A
STATION :
Fixing the table on the tripod stand :
LevellingTheTable :
With the help of spirit level at different corners.The bubble is
brought to the Centre
By adjusting the legs.

4. Centring the table :
With the help of U-Fork and Plumb Bob .

5. Marking the North Line :
The trough compass is placed on the right-hand
top corner with its north end approximately
Towards the north .Then the compassis turned
clockwise or anticlockwise so that the needle
Coincides exactly with the 0-0 mark.

6. Orientation:
During plane table surveying the orientation
must be performed at every successive station It
may be done by a magnetic needle or by
backsighting method.The backsighting process
is always Preferred,because it is reliable.

7. METHODS OF PLANETABLING :
The following are the methods of plane
tabling :
Radiation
Intersection
Traversing
Resection

8. Radiation Method :
It requires the plane table to occupy a single
station.
•Orientation table is not required.
•To conduct the survey of an area , the table
is kept at a Convenient station P
commanding a full view of the area to be
surveyed.

10. Intersection Method :
•This method requires setting the table up at
minimum
Of two stations.
• Orientation is essential and be can done by
back
Sighting.
•Two station A and B are selected so that they
Command a full view of the area to be surveyed.

12. Traversing Method :
This method is used to connect the two or
more Stations , however it is similar to the
compass traversing But are done simultaneously.
Traversing is a method of surveying where
by a series Of lines are surveyed
Traverse may be open or closed one.

14. Re-section Method :
This is the method of orienting the table . A
characteristics feature of resection is that The
object is to plot the station occupied by the table
on the sheet rayher than obtaining
 The other stations or plotting details .
 Two method of orienting the table
 Method of back sighting
 Method using trough compass