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Back Sight given Height of Instrument Formula

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Back Sight is the sight or reading taken towards the back or towards a known elevation. Check FAQs
BS=HI-RL
BS - Back Sight?HI - Height of Instrument?RL - Reduced Level?

Back Sight given Height of Instrument Example

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With units
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Here is how the Back Sight given Height of Instrument equation looks like with Values.

Here is how the Back Sight given Height of Instrument equation looks like with Units.

Here is how the Back Sight given Height of Instrument equation looks like.

36Edit=65Edit-29Edit
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Back Sight given Height of Instrument Solution

Follow our step by step solution on how to calculate Back Sight given Height of Instrument?

FIRST Step Consider the formula
BS=HI-RL
Next Step Substitute values of Variables
∴ BS=65m-29m
Next Step Prepare to Evaluate
∴ BS=65-29
LAST Step Evaluate
∴BS=36m

Back Sight given Height of Instrument Formula Elements

Variables
Back Sight
Back Sight is the sight or reading taken towards the back or towards a known elevation.
Symbol: BS
Measurement: LengthUnit: m
Note: Value can be positive or negative.
Formulas to find Back SightOpen Variable
Height of Instrument
Height of instrument is the vertical distance from the surface of earth to the collimation plane. It is also called as height of plane of collimation.
Symbol: HI
Measurement: LengthUnit: m
Note: Value can be positive or negative.
Formulas to find Height of InstrumentOpen Variable
Reduced Level
Reduced level is the vertical distance between a survey point and the adopted level datum.
Symbol: RL
Measurement: LengthUnit: m
Note: Value can be positive or negative.
Formulas to find Reduced LevelOpen Variable

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How to Evaluate Back Sight given Height of Instrument?

Back Sight given Height of Instrument evaluator uses Back Sight = Height of Instrument-Reduced Level to evaluate the Back Sight, Back Sight given Height of Instrument is sight or reading taken to known elevation (generally to bench mark). Back Sight is denoted by BS symbol.

How to evaluate Back Sight given Height of Instrument using this online evaluator? To use this online evaluator for Back Sight given Height of Instrument, enter Height of Instrument (HI) & Reduced Level (RL) and hit the calculate button.

FAQs on Back Sight given Height of Instrument

What is the formula to find Back Sight given Height of Instrument?
The formula of Back Sight given Height of Instrument is expressed as Back Sight = Height of Instrument-Reduced Level. Here is an example- 36 = 65-29.
How to calculate Back Sight given Height of Instrument?
With Height of Instrument (HI) & Reduced Level (RL) we can find Back Sight given Height of Instrument using the formula - Back Sight = Height of Instrument-Reduced Level.
Can the Back Sight given Height of Instrument be negative?
Yes, the Back Sight given Height of Instrument, measured in Length can be negative.
Which unit is used to measure Back Sight given Height of Instrument?
Back Sight given Height of Instrument is usually measured using the Meter[m] for Length. Millimeter[m], Kilometer[m], Decimeter[m] are the few other units in which Back Sight given Height of Instrument can be measured.
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