Outline the procedure of chain surveying.(6 marks)June/July 2020

Chain surveying is a method of land surveying that involves the use of a chain and a series of measurements taken with a tape measure or other linear measuring device. It is typically used for relatively small or simple surveying projects, such as boundary surveys or construction surveys. Here is an outline of the procedure for chain surveying:

1. Preparation: The surveyor will gather all the necessary equipment, including a chain, a tape measure, a level, a compass, and any other necessary tools. The surveyor will also review any existing maps or other information about the site, and will establish the starting point and the overall scope of the survey.
2. Measurements: The surveyor will begin by taking a series of measurements using the chain and tape measure, starting at the starting point and working outward. The surveyor will measure both the horizontal and vertical distances between points, and will record the measurements in a field book.
3. Setting points: The surveyor will mark the location of each measurement point with a stake or other marker, and will record the location and elevation of each point in the field book.
4. Triangulation: The surveyor will use the measurements and locations of the points to establish the shape and elevation of the land, and will use triangulation techniques to determine the position of points that cannot be directly measured.
5. Mapping: The surveyor will use the collected data to create a map of the site, including the location and elevation of all the measured points. The map may be hand-drawn or created using computer software.
6. Review and adjustment: The surveyor will review the map and the field notes to ensure that the data is accurate and complete, and will make any necessary adjustments. The final map and field notes will be used as the official record of the survey.