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
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.
is to eliminate collimation error
Height of Instrument
protractor
A graphometer is a surveying instrument. It is used to measure angles.
weak assidnment
In Visayas, common traditional instruments include the guitar, drums like the tambor and tambourine, the banduria (a small guitar-like instrument), and various bamboo instruments like the kubing (jaw harp) and the kulintang (gong instrument). These instruments are often used in traditional folk music and dances in the Visayan region of the Philippines.
First find the height, width and length of the box, next times these number together and you will get the answer.
The Visayas are islands in the Philippines. As to 'instrument' - you need to give more information? Musical instrument? Surveying instrument? Or something else?
You should use a tape measure, ruler, or meter stick. The measurements should be in inches, feet, or centimeters.
The groma wa a surveying instrument.
Jacobs Staff
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.
optical surveying instrument