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
The ceilometer instrument.
A heightometer.
Simple geometry and using triangles can tell you the height and location of any point on earth with surveying techniques
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.
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.
Height of Instrument
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.
protractor
A graphometer is a surveying instrument. It is used to measure angles.
weak assidnment
First find the height, width and length of the box, next times these number together and you will get the answer.
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.
The Visayas are islands in the Philippines. As to 'instrument' - you need to give more information? Musical instrument? Surveying instrument? Or something else?
Jacobs Staff
The groma wa a surveying instrument.
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.
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.