Marking site boundaries using a compass is a precise surveying technique that ensures the accuracy of boundary delineation. The process begins by using provided site details, including the bearings and lengths of each boundary line. The initial step involves calculating latitudes and departures for all sides of the site. This computation verifies that the traverse is free of errors, ensuring a closed and accurate boundary.
The process starts at a known point, such as Point A, which is often aligned with permanent references. Using the specified bearing and length, a compass is employed to align a range pole and mark the next corner, Point B. The surveyor confirms accuracy by cross-checking the back bearing of the marked side.
Once Point B is established from Point A, the compass is relocated at Point B to range the subsequent boundary and mark the next corner, continuing this procedure for all corners of the site. As the survey progresses, each point is marked systematically, and back bearings are verified to maintain accuracy.
The survey concludes by closing the traverse, where the final side connects back to the starting point. When the last point aligns with the original bearings and length, the survey’s precision is confirmed. This systematic approach ensures reliable and accurate boundary marking for the site.
Consider the given site details, including side bearings and lengths, where latitudes and departures are determined to ensure accurate marking of site boundaries on the ground.
Firstly, the latitudes and departures of each side are calculated to check for errors. Here, there are no errors in the traverse.
Corner A is located on a permanent object, a survey benchmark.
The marking of the boundary starts with the side AB. From corner A, a range pole is aligned towards the point B through a compass using the specified bearing and length of AB.
Once point B is marked, the instrument is shifted to point B to range point A, cross-checking the back bearing of AB and then to range point C.
Further, the remaining corners are marked on the ground using the same procedure, and each side of the site is marked.
When point A is ranged from point D, it is observed that point A coincided with the bearings and the length of DA, verifying the accuracy of the survey.
繁體中文
