#### Numerical Examples for Errors in Chain Surveying

We will now move on with different numerical problems on the concept of Errors in Chain Surveying. Going through these numericals will actually give you an idea as to how the calculations are done inspite of errors occurring in the Chain Surveying.

#### Correction due to incorrect length of chain

This is like a formula list which is to be kept in mind while making Calculations:

True distance = L’/L*measured distance

True area = (L’/L)2*measured area

True Volume = (L’/L)3 * measured volume

Where, L’ = incorrect length of chain

L = correct length of chain

**The length of a line measured with 20m chain was found to be 500m. It was subsequently found that the chain was 0.04m too long. What is the length of line?**

Correct length of chain, L’ = 20 + 0.04 = 20.04m

Length, L = 20m

Measured length, = 500m

True length = (L’/L) * measured length

= (20.04/20) * 500

= 501m

**We will continue with more examples on the same topic in our successive articles…**

i need some important solution of some problem.

the distance between two stations was found to be 5305ft.when measured by an Engineering chain & 7946 links by Gunter’s chain.both of the chain were incorrect.what correction is needed in the Engineering chain if the Gunter’s chains 0.4 links too long?

Thanx for the tips on survey. Really helps

I want more examples

This methods are very use full to the survey

I need some help here please, the distance between two stations was 1200m when measured with a 20 metre chain, the same distance when measured with a 30 metre chain was found to be 1195.if the 20 m chain was 0.05 too long what was the error in the 30 metre chain?

I think 30m chain was long

The true length using 20m chain will be 1203m

Use the same true length to find the true length of 30m chain and if will be 30.2008m

The error shall be 30.2008-30=0.2008m

The 30m chain is too long by .133m

Can u explain it how ??

True length=(20.05÷20)×1200=1203

1203=(x÷30)×1195

X=30.200

So 30m chain is .200 long

Above example is incorrect or the formulas provided are incorrectly mentioned.