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 various challenges. When relying on manual inspections or original vehicle personnel, the detection rate of illegal land use tends to be low, with many cases going unnoticed or discovered too late. Issues such as "not patrolling, not seeing everything, arguing, and discovering late" often occur, leading to inefficiencies and increased risks.
Compared to conventional data collection and update methods, UAV aerial photography systems offer significant advantages. They are cost-effective, efficient, and capable of quickly acquiring high-resolution, large-scale images. This makes them an excellent complement to traditional methods, meeting the growing demand for technological advancement in land monitoring.
When conducting drone-based land surveillance, several key considerations should be taken into account to ensure efficient and safe operations. These include selecting the appropriate flight height, setting optimal overlap rates, and choosing the right takeoff points.
**Work Height Selection**
During routine drone inspections, it's common to encounter areas with buildings of varying heights. If the drone flies at a fixed altitude, it may collide with obstacles or even crash. To avoid this, it's essential to set the working height above the tallest building in the line of sight before starting the mission. In areas with high-rise structures, such as office buildings, consider bypassing or taking off from a higher location to ensure smooth flight.
**Overlap Rate Parameter Setting**
The overlap rate refers to the degree of image overlap between consecutive photos. A higher overlap rate improves the quality of image synthesis but increases data volume and processing time. For complex post-processing tasks like 3D mapping or point cloud generation, an airborne overlap rate of 80% is recommended. For orthophoto production, a standard heading and side overlap of 60% is typically sufficient.
**Choice of Takeoff Point**
When using ground station software to control autonomous flights, the drone follows pre-set missions. However, once it goes out of visual range, the operator must remain alert and ready to intervene manually. Key tips for safe operation include:
- Ensure the remote control antenna (flat side) is pointing directly toward the drone. Adjust the remote control height if the distance increases to maintain signal strength.
- Avoid flying in high-interference areas such as city centers, near power lines, or crowded zones.
- Minimize physical obstructions between the drone and the controller, as they can disrupt communication and real-time video feed, posing safety risks.
This concludes our latest session on drone inspection technology. We welcome your questions and feedback in the comments below. Stay tuned for our next class!
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