NEWS

20

2023

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04

Remote Sensing Surveying and Mapping - UAV Aerial Photography Surveying and Mapping Process

In recent years, the surveying and mapping industry has introduced drones as a platform for carrying aerial photography and surveying equipment, which are widely used in various surveying and mapping projects. The specific process of drone aerial survey is as follows:

1. Flight preparation

The preparation before flight includes: preparing aerial surveying and mapping equipment (including batteries), route planning, and flight plan (determining altitude, flight speed, and overlap)

2. Record daily work data

Record the aerial survey data collected during the day's operation, as well as information such as wind speed, weather, takeoff and landing coordinates, and save the data for future reference and analysis.

3. Establish radio and ground stations

The radio link is used for communication between ground stations and unmanned aerial vehicles. Currently, most surveying drones use radio links to exchange data between drones and ground stations.

4. Flight Execution

According to the established zoning aerial photography plan, find suitable takeoff points and take photos of each area. After completing the equipment inspection and confirming the safety of the takeoff area, unlock the drone for takeoff. During takeoff, the pilot controls the aircraft in real-time through a remote control, and the ground station flight control personnel observe the aircraft's status through the parameters transmitted back from the aircraft. After the aircraft reaches a safe altitude, the pilot retracts the landing gear through the remote control and switches the flight mode to automatic mission flight mode. At the same time, the pilot needs to constantly monitor the dynamics of the aircraft through visual observation of the drone, and the ground station flight control personnel should pay attention to the battery condition, flight speed, flight altitude, flight attitude, and route completion status in the flight control software to ensure flight safety.

5. End of flight

After completing the flight mission, the drone should ensure the safety of the landing site and avoid pedestrians approaching during landing. After landing, check if the image data in the camera and the data in the flight control system are complete. After the data acquisition is completed, the quality of the acquired images needs to be checked, and unqualified areas need to be repaired until the quality of the acquired images meets the requirements.

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