Transversing - Pedigogy

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Transversing

Surveying which involves a series of connected lines is known as transversing.
The size of transverse is known as transverse leg.
The length of transverse leg are measured by chain or tape and the direction are fixed by compass or theodolite.

Classification of transversing

A. Based on instrument used in transversing:

a) Chain transversing:

It is mainly conducted when it is not possible to adopt triangulation.
In this method, the angles between adjacent sides are fixed by chain angles.
The entire survey is conducted by chain and tape only and no angular measurements are taken.

ENGINEERING SURVEY AND ESTIMATING : THE CHAIN TRAVERSE

b) Compass transversing:

In this method, fore and back bearing of transverse leg is measured by prismatic compass and the sides of transverse is measured by tape.
Then the observed bearing is verified and necessary correction for local attraction is applied.

Compass Traversing

c) Theodolite transversing:

In such transversing, the horizontal angles between the transverse legs are measured by theodolite.
The length of the legs are measured by chain or by employing stadia method.

d) Plain table transversing:

In this method, a plan table is set at every transverse station in the clockwise or anticlockwise direction, and the circuit is finally closed.

B. Based on base of track:

a) Open transverse

b) Closed transverse