Auto level is leveling device
consisting on Instrument level machine ,Staff OR Reading Rod, Tripod or Stand.
Auto-Level is Used to find out Elevations in different type of surveying processes.
In leveling process some steps are
involved to complete survey which are as follows.
1- Establishment of Physical
references like Permanent bench marks and Temporary Bench Marks.
2-Measurement and recording of area
information as length measurements of features and distance measurement to
locate the positions of different features at ground.
3-Calculations of leveling and
making different drawings to produce perfect survey report.
I am submitting formulas for
leveling work .
Height of Instrument (H.I) = B.S + RL of Bench Mark OR RL of any Spot.
Reduced
Level (R.L) = H.I - B.S OR I.S OR F.S
Back Sight = B.S It is first reading after setting of level
.
Inter-sight = I.S The readings between B.S and F.S
Fore-Sight = F.S
It is last reading before shifting of level machine.
Suppose we have to find out elevations
of Ground Floor using leveling process , First of all find any firm reference
(As Concrete floors, Foundations) for establishment of Bench Mark. Firstly assuming
the value of bench mark as 100 m , and set the level machine near bench mark to
take first reading (B.S) and then start other readings (Inter-Sights) at ground
where construction work is proposed. At the end survey will be closed with last
reading of Fore-Sight (F.S). The length
of Ground where construction has been proposed is 350 Meters. We will enter all
readings in leveling table to calculate the Ground Elevations.
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