Levelling in Surveying

Generated Image

Introduction of Levelling in Surveying

One of the most important steps in surveying is leveling. The process of leveling is to determine the height of different points on the surface of the earth so that they can be related to each other. There are different leveling instruments available which makes leveling an easy task. Some of the common leveling instruments are leveling staff, dumpy level, and theodolite.

Temporary Adjustment of Levelling

  • If a survey line is found to be too long or too short, the error may be due to one of the Fake locations of the instrument or wrong reading of the vernier scale
  • The error may be corrected by a temporary adjustment of levelling.

    In case of long line, the level is shifted forward on the tripod and in case of short line, it is shifted backward

  • The amount of forward or backward movement is generally one-half of the length of the line
  • The line is then remeasured
  • The error may also be corrected by changing the length of the level by moving the eye vane up or down the level tube.

Two Peg Test

  • The two peg test is a measure of cognitive function
  • It is a simple test which requires the person being tested to place two pegs into holes in a board, one after the other
  • The test is typically given to older adults, as it is a good measure of cognitive function in this population

  • However, it can be given to people of any age
  • The two peg test is a good measure of executive function, attention, and visuo-spatial skills

  • It is a quick and easy test to administer, and can be done with any type of pegs and board.

Booking and Reducing Levels

  • If a sound level exceeds 80 dB, hearing damage can occur
  • To protect your hearing, it is important to reduce the sound level whenever possible
  • One way to do this is to book a room at a lower level
  • This can be accomplished by contacting the front desk or management of the facility in which you will be staying and requesting a room on a lower floor
  • If you are unsure of the sound levels in the area, you can also ask for a noise meter to be installed in your room.

Conclusion

Over the years, levelling has become an important tool in surveying. It is a process that helps to determine the height of an object above a fixed datum plane. Levelling is used in a variety of applications, such as construction, topographic mapping, and geodetic surveying. There are many different types of levelling, but the most common is the three-point levelling method. This method uses a tripod and a level to determine the height of an object. The three-point method is quick and easy to use, and it is ideal for small projects.

Frequently Asked Questions

What is the three-point levelling method?

The three-point levelling method is a quick and easy way to determine the height of an object. It uses a tripod and a level to take measurements.

What is levelling?

Levelling is a process that helps to determine the height of an object above a fixed datum plane.

What is levelling?

Levelling is the process of determining the height of an object above a fixed datum plane. This is done by using a tripod and level to take measurements. The three-point levelling method is the most common type of levelling.

Leave a Comment