Obtaining surveying and mapping image data
When using drones for measurement, high technical requirements are placed on surveyors, who are required to have a basic understanding of the topography and other information of the measured area. They need to conduct on-site surveys before actual measurements and formulate drone flight routes based on the on-site surveys to fully ensure the rationality of the flight routes. After planning the flight routes, they can conduct test flights, debug and optimize deficiencies and related links in the test flights, and officially start measurement after ensuring that the test flights are successful.
After the drone obtains data information, it should be used to take pictures and use three-dimensional imaging technology to build a three-dimensional model, so as to present the image of the measured area more clearly and three-dimensionally.
In order to maximize the measurement function of the drone, the drone can be operated to enable it to achieve multi-angle shooting.
After completing the image capture, the captured images need to be analyzed to observe the imaging distance, lighting, etc., so as to standardize the images later.
Measuring in harsh environments
Surveying and mapping projects often encounter complex geographical features and harsh environmental climates. If traditional surveying technology is still used, it will be difficult to complete the surveying and mapping work, and the validity of the data cannot be guaranteed. Therefore, drones can be used for measurement.
The drone adopts a low-altitude flight mode to take all-round aerial photos of the measured area, while obtaining corresponding data information, and conducting scientific analysis on this data information, providing strong data support for subsequent engineering construction and promoting the smooth completion of the surveying and mapping work.
This alone is not enough. We should also increase the application of modern science and technology, give full play to the value of modern science and technology, use intelligent analysis systems to analyze drone aerial data, effectively improve surveying and mapping efficiency, and ensure the safety of surveying and mapping personnel.
Collecting data
In the process of using drones for engineering surveying and mapping, it is first necessary to ensure that the nodes and hosts in image recognition can communicate efficiently, and use the advantages of image recognition technology to promote data collection and aggregation. Image recognition technology can promote the sharing and processing of Internet data. Therefore, when designing, it is necessary to improve the timeliness of data on the basis of image recognition requirements. It is necessary to quickly and effectively collect and transmit data to facilitate timely positioning of the working status of the equipment.
There are two ways to collect data using drones in surveying and mapping projects: automatic encrypted collection (data is saved through the internal system of the drone equipment, and encryption technology is used to protect information data to reduce the risk of data loss. Only internal personnel or authorized personnel can successfully read the obtained data, fully improving data security) and manual collection (operators remotely control the computer to perform measurements according to the purpose and requirements of surveying and mapping, thereby obtaining data information).
Processing measurement data
Compared with traditional surveying technology, drone technology can process measurement data better and more efficiently, and can ensure the accuracy of the measured data. A large amount of practice has shown that the application effect of this technology is good.
For example, when surveying in mines, drones can be used for measurement. While ensuring the integrity of the measurement data, it can lay the foundation for subsequent mining work and use the acquired data information to help the mining work proceed smoothly.
It is worth noting that no matter in which field the drone technology is applied, the speed of the drone should be controlled, the ecological conditions of the measurement range should be mastered, and the information should be fed back to professionals as soon as the collection is completed, so as to facilitate the timely formulation of the project implementation plan.
At present, most drone surveying and mapping use CCD as the photosensitive part, and use necessary reinforcement devices and power modification to enable it to be used as a digital camera with strong stability.
However, the photosensitive unit also has certain distortion problems, which leads to errors in the camera function. In order to effectively solve this problem, high-performance cameras suitable for drone shooting can be used to strengthen the optimization of related functions and make their performance more stable.
Application
UAV image control point layout
Point layout is the basic content that needs to be completed for drone surveying and mapping work. Point layout covers the measurement of control points and the layout of shooting routes.
Control point measurement and shooting route layout are important contents to ensure the scientific nature of the route. Only by ensuring that the route is reasonable can the data information formed be more real and effective.
In some surveying and mapping work, in order to promote higher surveying and mapping quality, selective and targeted measurements will be carried out to fully ensure network unification and scientific cooperation, so as to promote better data transmission effect.
Parameter measurement can also be carried out using mobile stations. In specific applications, the setting of the drone needs to be completed in advance.
Aerial triangulation
Generally, a tripod is used to fix the drone during measurement. The steps are as follows:
First, use the aerial encryption measurement technology to achieve targeted location encryption settings. You can set the camera range and set the encryption distance during the measurement process so that the system can handle complex terrain and harsh climate environments scientifically.
The second is to set the triangulation encryption points. During the application process, the data measurement of the aerial triangulation encryption points needs to be completed.
During the entire measurement process, the system can adjust the measuring instrument according to the actual situation and regional conditions, but this does not mean that it can fully realize automated and intelligent operation. Manual settings are required before actual measurement to ensure that different connection points are more in line with the requirements of terrain mapping.
UAV retest operation
UAV terrain mapping needs to be operated according to the set measurement points, which can be achieved by supplementary measurement. After the actual measurement area and location are determined, the internal parameters are adjusted through various technologies to achieve scientific measurement and planning. For a small number of areas with measurement blind spots, supplementary measurement is required to meet data acquisition needs.
For this part of the measurement, data can be supplemented, or data analysis technology can be used to fully ensure the accuracy of the measurement results.
Once there is an area where omissions or doubts about the measured data occur, it is necessary to re-measure this area, which can not only ensure the overall quality of surveying and mapping, but also effectively avoid large-scale omissions and solve the problem of long time required for manual surveying and mapping.
However, there are certain risks in using drones for measurement, so manual assistance is required in actual measurement to control the process and content of drone surveying and mapping technology and reduce the probability of data accuracy reduction.
However, too much manual intervention will lead to a lack of objectivity in the measurement results. Therefore, in order to fully ensure the rationality of surveying and mapping work, relevant parameters should be set in advance to minimize human intervention and promote the two-way improvement of surveying and mapping work efficiency and quality.
UAV technology is an emerging technology that plays an important role in urban surveying and mapping. It has low cost, convenient operation, and a wide range of applications. It can meet high-intensity and high-precision measurement requirements, lay a good foundation for improving the quality of surveying and mapping projects, and provide strong support for urban development and construction. It is believed that the application field of UAV technology will be broader in the future, and related functions will be further optimized.
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