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Contents of the Levelling PDF

Angle between Line of Sights given Radius of Curvature

Angle between Line of Sights in Radians

Angle of Dip for Compass Surveying

Back Sight given Height of Instrument

Combined Error Due to Curvature and Refraction

Correction on Refraction Error

Difference in Elevation between Ground Points in short lines under Trigonometric levelling

Difference in Elevation between Two Points using Barometric Levelling

Distance between Two points under Curvature and Refraction

Distance for small errors under Curvature and Refraction

Distance from Instrument to Staff given Angle between LOS

Distance to Visible Horizon

Error Due to Curvature Effect

Height of Instrument

Height of Observer

Number of Division where Bubble Moves given Staff Intercept

Permissible Closing Error for Accurate Levelling

Permissible Closing Error for Ordinary Levelling

Permissible Closing Error for Precise Levelling

Permissible Closing Error for Rough Levelling

Radius of Curvature of Tube

Reduced Level given Height of Instrument

Staff Intercept given Angle between LOS

Constant: pi, 3.14159265358979323846264338327950288
Archimedes' constant
Function: log10, log10(Number)
The common logarithm, also known as the base-10 logarithm or the decimal logarithm, is a mathematical function that is the inverse of the exponential function.
Function: sin, sin(Angle)
Sine is a trigonometric function that describes the ratio of the length of the opposite side of a right triangle to the length of the hypotenuse.
Function: sqrt, sqrt(Number)
A square root function is a function that takes a non-negative number as an input and returns the square root of the given input number.
Measurement: Length in Millimeter (mm), Meter (m)
Length Unit Conversion
Measurement: Temperature in Celsius (°C)
Temperature Unit Conversion
Measurement: Angle in Radian (rad), Degree (°)
Angle Unit Conversion