Principle ,procedure,errors & correction of chain survey

1. Welcome To Presentation
Presentation on : Chain surveying
Under the course of Practical Surveying

2. Hello
I am Tajamul I am Sakib

3. Content
➢ Chain survey
➢ Objective
➢ Principle of chain surveying
➢ Instruments
➢ Procedure
➢ Errors
➢ Correction

4. What is chain survey?
❖ Chain surveying is one of the methods of land
surveying in which only linear measurements are
involved and no angular measurments are taken.
❖ As a quick method of surveying to get a rough
idea in the location to be surveyed ..

5. Why chain survey?
Yes
let’s go
✓ Explain the methods of plotting
chain survey data..
✓ Apply the necessary corrections
to measured distances.
✓ List the different errors that can
occur during the measurement
of distance using chain or tape.
✓ Explain obstacles to chaining
and methods to overcome the
same.
OBJECTIVES This is most
suitable
adapted to
small plane
areas with very
few details.

6. Principle of Chain surveying Chain surveying the
simplest method of
surveying
In which only linear
measurements are made
and no angular
measurements are taken
In Chain Surveying, the whole area to be
surveyed is divided into framework of
triangles of suitable sizes. It is advisable
to use well-conditioned triangles whose
sides are as nearly equal as possible with
angles between 30° to120°.

7. Engineer’s Chain`
INSTRUMENTS
Field book
Pencil
Engineer’s Chain`
INSTRUMENTS
Field book
Pencil

8. Procedure: When Picture Says All-
A B
A B

9. Errors:
Erroneous
Length of
chain
Bad Ranging
Careless
Holding and
Marking
Bad
Straightening
Sag in Chain
Variation in
Temperature
Variation in
Pull
Personal
Mistakes
Erroneous
Booking
Errors 
Need To Be Careful 
Survey Offsets
Perpendicular
Offsets
Oblique Offsets

10. Correction:(Linear Measurement)
1.Correction for
standardization
2.Correction
for Slope
3.Correction
for
Temperature
4.Correction
for Tension
5.Correction for
Sag
Suitability of Chain Survey
The area to be surveyed is
comparatively small
The ground is fairly level
The area is open and
Details to be filled up are
simple and less.

11. Thank you