1. preparation before field operation: check whether the total station is within the qualification period of the appraisal certificate and determine whether it is available normal equipment; Check whether the foot screws and fine-tuning screws of the total station are at the initial zero position; Whether the high steel rule, altimeter, thermometer and other tools in the instrument box are complete, upload the known control point coordinates and lofting point design coordinates to the new project of total station.

2. After arriving at the job site, open the instrument box, set up the total station at the known control points, turn it on for 2-3 minutes, check the altimeter and thermometer, read the air pressure and temperature, and input the items specified by the total station.

3, total station leveling, station orientation work. Enter the station number A, and the total station automatically extracts the coordinates and elevations corresponding to the known control points. After confirmation, the measuring input instrument will query and input the viewpoint number B, and the total station will automatically extract the coordinates and elevations corresponding to the known control points. After the query and input, the viewpoint prism will be high. Finally, report the confirmed viewpoint number and prism high telescope to the viewpoint prism, and then press the measure key to confirm. Check the initial side length of orientation after the station is fixed: use the lofting function in the total war instrument to loft the rear view B, and check whether the initial side length error meets the accuracy. In general, the relative error between the measured side length and the calculated side length should be less than 1/4000. Otherwise, there is something wrong with the site or the later point of view.

4. Start off. Enter the number of the lofting point, and the total station will automatically extract the coordinates and elevation of the corresponding known control points, and display the direction and distance between the lofting point and the survey site. Rotate the horizontal dial to the setting-out point direction, lock the horizontal dial, aim roughly with a telescope, guide the ruler to the preset setting-out point direction, and inform the ruler to move the prism rod left/right in the instrument direction. Instruct the ruler to adjust the prism so that it is within the line of sight of the telescope, and finally reach the vicinity of the crosshair of the telescope of the Total War Instrument, and then measure the distance. The total war instrument displays the front and back offset of the current prism position, and tells the ruler to extend/shorten the distance relative to the instrument. When approaching the design coordinate position of the lofting point, the telescope aims at the root of the prism rod, guides the ruler to adjust the direction so that the root of the prism rod is located in the vertical direction of the telescope, and then pulsates the vertical aiming. Quasi-prism, measure the distance again, and inform the surveyor of the extended/shortened distance relative to the instrument again until the direction of the final lofting point and the offset of the distance meet the requirements of lofting accuracy (in the above lofting process, the horizontal dial is always locked in the direction of the lofting point, and the surveyor must guide the surveyor to adjust the position of the prism to reach the specified direction), confirm and inform the surveyor to nail the pile, and ask the height of the prism after the prism is erected at the pile site again, and then proceed after the measuring station modifies the height of the prism.

5. Confirm the pile location of the lofting point to Party A's site personnel, and sign the lofting submission form for confirmation.

6. After the lofting is completed, go back indoors and export the measured coordinates and elevation of the stake location of the lofting point from the total war instrument, and write out the lofting report, such as the lofting submission form and the lofting point coordinate table.