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Tilt of the staff in stadia tacheometry increases the intercept if it is
- a)Away from the telescope pointing down hill
- b)Towards the telescope pointing up-hill
- c)Away from the telescope pointing up-hill
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
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Tilt of the staff in stadia tacheometry increases the intercept if it ...
Tilt of the staff in stadia tacheometry increases the intercept if it is away from the telescope pointing up-hill. In stadia tacheometry, a staff is held vertically at a point on the object to be measured, and the angle between the staff and the horizontal cross-hairs in the telescope is measured. The staff is held vertically, that is parallel to the line of sight of the telescope, which is a requirement for accurate measurements. However, if the staff is not held parallel to the line of sight, it will cause an error known as staff intercept, which can affect the accuracy of the measurement. Tilt of the staff towards the telescope pointing up-hill, or away from the telescope pointing down-hill decrease the intercept, while tilt of the staff away from the telescope pointing up-hill increases the intercept.
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Tilt of the staff in stadia tacheometry increases the intercept if it ...
Tilt of the staff in Stadia tacheometry
Stadia tacheometry is a method of measuring distances in surveying using a telescope with stadia hairs or wires. The stadia hairs or wires are used to determine the distance between two points based on the ratio of the distance to the height of the staff held at the target point. However, the tilt of the staff can affect the accuracy of the measurements.
Effect of staff tilt on intercept
The intercept is the difference between the height of the instrument and the height of the staff at the target point. When the staff is tilted, the intercept increases or decreases depending on the direction of the tilt.
Direction of staff tilt
There are two directions of staff tilt in stadia tacheometry - towards the telescope and away from the telescope.
Impact of staff tilt on intercept
The impact of staff tilt on the intercept depends on the direction of the tilt.
If the staff is tilted towards the telescope and pointing up-hill, the intercept decreases. This is because the staff appears taller than it actually is, and the distance between the target point and the instrument is overestimated.
If the staff is tilted away from the telescope and pointing down-hill, the intercept also decreases. This is because the staff appears shorter than it actually is, and the distance between the target point and the instrument is underestimated.
However, if the staff is tilted away from the telescope and pointing up-hill, the intercept increases. This is because the staff appears shorter than it actually is, and the distance between the target point and the instrument is overestimated.
Conclusion
In stadia tacheometry, the direction of staff tilt affects the accuracy of the measurements. Tilt away from the telescope pointing up-hill increases the intercept.
Stadia tacheometry is a method of measuring distances in surveying using a telescope with stadia hairs or wires. The stadia hairs or wires are used to determine the distance between two points based on the ratio of the distance to the height of the staff held at the target point. However, the tilt of the staff can affect the accuracy of the measurements.
Effect of staff tilt on intercept
The intercept is the difference between the height of the instrument and the height of the staff at the target point. When the staff is tilted, the intercept increases or decreases depending on the direction of the tilt.
Direction of staff tilt
There are two directions of staff tilt in stadia tacheometry - towards the telescope and away from the telescope.
Impact of staff tilt on intercept
The impact of staff tilt on the intercept depends on the direction of the tilt.
If the staff is tilted towards the telescope and pointing up-hill, the intercept decreases. This is because the staff appears taller than it actually is, and the distance between the target point and the instrument is overestimated.
If the staff is tilted away from the telescope and pointing down-hill, the intercept also decreases. This is because the staff appears shorter than it actually is, and the distance between the target point and the instrument is underestimated.
However, if the staff is tilted away from the telescope and pointing up-hill, the intercept increases. This is because the staff appears shorter than it actually is, and the distance between the target point and the instrument is overestimated.
Conclusion
In stadia tacheometry, the direction of staff tilt affects the accuracy of the measurements. Tilt away from the telescope pointing up-hill increases the intercept.
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Tilt of the staff in stadia tacheometry increases the intercept if it isa)Away from the telescope pointing down hillb)Towards the telescope pointing up-hillc)Away from the telescope pointing up-hilld)None of theseCorrect answer is option 'C'. Can you explain this answer?
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