Auto level survey calculation

 

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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