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When surveying using a "level" instrument , the "level" instrument is set-up and adjusted to level by adjusting the screws. When surveying you have an instrument person and a rod person. When trying to find the height of the instrument, the rod person places there rod over a "known" elevation, either a benchmark or a temporary benchmark that has a known elevation. To get the height of the instrument, you need to "shoot" the level to the rod person holding the rod on the known elevation, this is called the "Backsight". This elevation will be read by the instrument person, and recorded in the survey field book. This value backsight elevation will then be added to the known elevation of the benchmark or the temporary benchmark, to get the height of instrument.
HI = known elevation + BS Height
What else can I help you with?
Which instrument would a meteorologist use to measure the height of clouds?
The ceilometer instrument.
What instrument measures the height of a desk?
A heightometer.
How did they measure the height of mountains in 1910?
Simple geometry and using triangles can tell you the height and location of any point on earth with surveying techniques
Why dumpy level is named so?
The term "dumpy level" is derived from its compact and robust design, which resembles a small, squat instrument. The "dumpy" aspect refers to its low-profile appearance, making it stable and easy to use in various surveying tasks. This level is particularly appreciated for its durability and simplicity, which contribute to its effectiveness in construction and land surveying.
What The instrument that indicates the height of an airplane is called?
If the question is about how high the airplane is in the atmosphere, I would think that an altimeter would be an answer to consider.
What does the abbreviation HI mean in surveying?
Height of Instrument
How do you find reduced level?
To find the reduced level (RL) of a point in surveying, you start with a known benchmark (a point with a fixed elevation) and measure the height of the instrument (HI) by adding the benchmark's elevation to the height of the instrument above that benchmark. Then, you conduct a leveling survey by measuring the staff readings at the point of interest. The reduced level is calculated by subtracting the staff reading from the height of the instrument (RL = HI - staff reading). This method ensures accurate elevation data for various surveying applications.
An instrument for measuring angles in surveying?
protractor
What is a measuring instrument starting with g?
A graphometer is a surveying instrument. It is used to measure angles.
What are the parts of transit or the universal surveying instrument?
weak assidnment
How do you calcuate the volume of a box?
First find the height, width and length of the box, next times these number together and you will get the answer.
What is Line of Collimation in surveying?
The line of collimation in surveying is an imaginary line that extends from the objective lens of a surveying instrument to the crosshairs in the telescope. It helps ensure the instrument is properly aligned and level for accurate measurements. By keeping the line of collimation straight and horizontal, surveyors can minimize errors in their readings.
What are the instruments used in visayas?
The Visayas are islands in the Philippines. As to 'instrument' - you need to give more information? Musical instrument? Surveying instrument? Or something else?
What is the Surveying instrument formally used for measuring distances and heights?
Jacobs Staff
How does a groma help Romans build roads?
The groma wa a surveying instrument.
Where can I buy land survey equipment that is for sale online?
You can buy surveying equipment at TigerSupplies.com/surveying. Yahoo has a directory of equipment providers here (http://dir.yahoo.com/Business_and_Economy/Business_to_Business/Engineering/Civil_Engineering/Land_Surveying/Supplies/Equipment/). You can buy land surveying equipment by visiting http://www.professionalequipment.com/surveying-instrument-digital-transit-neth-203-northwest-instrument-10220/laser-levels/?source=pegs. They cost about $1,200.
What is collimation error in survey?
Collimation error in surveying occurs when the line of sight of the instrument is not aligned properly with the target, leading to inaccurate measurements. This error can result from instrument misalignment, leveling issues, or improper sighting techniques. Regular calibration and adjustment of the instrument can help minimize collimation errors in surveying work.
