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…
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#1 by amma anandkumar on September 8, 2015 - 11:10 pm
This methods are very use full to the survey
#2 by ganesh dutta on August 8, 2015 - 11:50 pm
I want more examples
#3 by Mugo. on July 6, 2012 - 3:00 am
Thanx for the tips on survey. Really helps
#4 by aunik on March 17, 2012 - 7:44 am
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?