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Ranging and Fixing Of Survey Station

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The object of this experiment is to set up a survey station. This is the basic step of surveying but this is also the one which has the maximum number of errors.

The Equipments used for this are :-

1. Ranging rod …………5 Nos. (min).
2. 30 m Chain…………..1 Nos.
3. Arrow…………………5 Nos. (min.)

The Procedure to conduct is as follow :

(Ranging by eye)
1. First of all first ranging rod is established at known point A and its ranging rod should be fixed at point A up to completion of work.

2. Second ranging rod is established at known point B (or at known object) and a ranging rod should be fixed at point B up to completion of work.

3. Third ranging rod established at point P (or any) approximately on the line of point AB (by judgment) and it’s not greater than one chain length from point A.

4. Measure the distance of AP by chain and move ranging rod at point P to its next position and establishing a wooden peg or arrow at point P.

5. Third ranging is established at point Q (or any) approximately on the line of point AB (by judgment) and it’s not greater than one chain length from point P.

6. Measure the distance of PQ by chain and move ranging rod at point Q to its next position and establishing a wooden peg or arrow at point Q.

7. Its procedure repeats up to reaching point B.

8. Third ranging rod is established at known point C (or at known object) and a ranging rod should be fixed at point C up to completion of work.

9. Fourth ranging rod established at point P’ (or any) approximately on the line of point BC (by judgment) and it’s not greater than one chain length from point B.

10. Measure the distance of BP’ by chain and move ranging rod at point P’ to its next position and establishing a wooden peg or arrow at point P’.

11. Fourth ranging is established at point Q’ (or any) approximately on the line of point BC (by judgment) and it’s not greater than one chain length from point P’.

12. Measure the distance of P’Q’ by chain and move ranging rod at point Q’ to its next position and establishing a wooden peg or arrow at point Q’.

13. Its procedure repeats up to reaching point C.

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14. Fifth ranging rod established at point P” (or any) approximately on the line of point CA (by judgment) and it’s not greater than one chain length from point C.

15. Measure the distance of CP” by chain and move ranging rod at point P” to its next position and establishing a wooden peg or arrow at point P”.

16. Fifth ranging is established at point Q” (or any) approximately on the line of point CA (by judgment) and it’s not greater than one chain length from point P”.

17. Measure the distance of P”Q” by chain and move ranging rod at point Q” to its next position and establishing a wooden peg or arrow at point Q”.

18. Its procedure repeats up to reaching point A.

19. Finally complete a triangle and position of point A, B, and C is known respect to each other.

observation-table

figure-surverying

Precautions: –
1. The ranging rod should be established correctly state at all points.
2. The judgment of line should be taking correctly during established ranging rod at a point.
3. Distance between surveyor’s eye and reference station (eg. A, B and C) should be minimum one meter.

We are thankful to Mr Praveen Kumar Pandey for this very useful article and we hope to see more such contributions.

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Comments
  • Kumar September 1, 2009 at 3:22 am

    As u said “Out Dated”.
    How to set a Total Station may be helpful for the newcomers.

  • swati November 30, 2009 at 6:25 am

    i think the procedure of total station wil be more useful…

  • Manish Bishnoi March 17, 2010 at 1:34 am

    what is use of this work please tell………..

  • Venu April 29, 2010 at 11:15 am

    Good and creating interest in knowing basics

  • arup July 21, 2010 at 9:07 am

    help me for my assinment

  • semven September 6, 2010 at 3:23 pm

    what are the types of obstacles to ranging and chaining

  • rohit sawle September 7, 2010 at 1:35 pm

    thank you
    and very nices

  • Ssewankambo Ivan September 12, 2011 at 11:35 am

    Thanks for the article.
    What are the obtacle encountered in some cases while carrying out ranging and how to over come them?

  • andrew keya February 23, 2012 at 3:58 am

    please clarify to me about baseline. should it be at center of field or at bounderies.

  • Jamil ahmad September 24, 2012 at 11:41 pm

    Thankyou for this you have solve my problem God bless you

  • Derrick Okello October 2, 2012 at 6:11 am

    1.What factors are considered when fixing survey stations?
    2.With sketch diagrams describe the three types of obstructions and how they are minimized.
    Please could you help me with these question.You could email them to me.Thanks a lot

  • sophia December 5, 2012 at 4:28 pm

    Plz explain the ypes of obstacle in chain survey

  • Uday November 9, 2015 at 10:21 pm

    what is the length of the chain which is used to measure the distance

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