1. What is Kiping measurement
When the line is long, in order to ensure the accuracy of measuring the elevation of each point of the middle pile, it is usually necessary to introduce the known elevation points to the vicinity of the entire line, and measure one point at a certain distance as the base level point of the line . The elevation of the middle pile of the line near this point can be measured using this point as the base elevation. This measurement process is called Kiping measurement.

Precautions:
1. Pay attention to the leveling of the level when it is swinging the station, and the point should be as close as possible to the front and rear view to ensure that the internal errors of the instrument are eliminated.
2. After aiming at the rear view and reading, immediately turn to aim at the front view. At this time, the leveling state must be kept. reading.
3. In order to ensure the accuracy of measurement, it requires round-trip measurement, and the accuracy is within the requirements of ordinary surveying before the reading can be used. You can also use a double-sided ruler to check, try to check every station in the measurement.
4. The data measured by Kiping should be adjusted before being used. For specific adjustment methods, see General Survey Knowledge.
5. When measuring, the leveling ruler should be vertical, and the parallax should be eliminated first when reading, and the emcee should read the minimum data of the middle wire card position to ensure the most accurate reading.
6. The surveyor of the vertical ruler must ensure that there is no soil on the bottom of the ruler. When using the tower ruler, pay attention to the fact that there is no disconnection between the rulers.