The dynamic monitoring of land law enforcement is one of the core responsibilities of the Land and Resources Law Enforcement Institute. However, traditional inspection methods face several challenges. When relying on manual inspections or original vehicle patrols, the detection rate of illegal land use tends to be low, with many cases going unnoticed or discovered too late. Common issues include "not patrolling properly," "missing areas," "disputes during inspections," and "late identification." These inefficiencies not only consume a lot of time and labor but also reduce the overall effectiveness of law enforcement.
Compared to conventional data collection techniques, UAV (Unmanned Aerial Vehicle) aerial photography offers significant advantages. It is cost-effective, efficient, and capable of quickly capturing high-resolution, large-scale images. As a complementary tool to traditional methods, it supports modern technological development needs. When conducting land monitoring using drones, there are several key considerations that can enhance both efficiency and safety, ensuring better image quality for later manual analysis.
**Work Height Selection**
During routine drone operations, especially in areas with varying building heights, maintaining a consistent flight altitude may lead to obstacles blocking the drone's path, potentially causing crashes. To avoid this, it’s crucial to set the working height above the tallest structure in the line of sight before starting the mission. In high-rise zones like office buildings, choosing an elevated takeoff point or planning a bypass route can further improve safety and accuracy.
**Overlap Rate Parameter Setting**
The overlap rate refers to the degree of image overlap between consecutive photos. While higher overlap rates improve image synthesis quality, they also increase data volume and processing time. For complex post-processing tasks such as 3D modeling or stereo mapping, an airborne overlap rate of 80% is recommended. For orthophoto generation, a standard heading and side overlap of 60% is typically sufficient.
**Choice of Takeoff Point**
When operating drones through ground station software, the drone follows pre-programmed missions. Once out of visual range, operators must remain vigilant and ready to intervene manually due to potential signal interference from wind, electromagnetic fields, or obstacles. Key tips include:
- Ensure the remote control antenna (flat side facing the drone) is aligned correctly. Raise the controller if the distance increases to maintain a stable signal.
- Avoid flying in high-interference zones like city centers, near power lines, or crowded areas.
- Minimize physical obstructions between the drone and the controller to prevent communication loss and ensure real-time video transmission.
By following these guidelines, drone operators can significantly improve the accuracy, safety, and efficiency of land monitoring efforts. This concludes our current session on drone inspection technology. We welcome any questions or suggestions in the comments below—stay tuned for our next lecture!
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