What is the role of drones? At present, most people are exposed to aerial photography, but the real need for drones is drones + industry applications. In the past, the way of modeling was hand-painted. When we stood at a certain height and could fly freely, a new generation of modeling was born, using drones for tilt photography. Today, I will take you to take a look at the application of drone tilt photography technology in the surveying and mapping industry.
Insert a sentence here, that is, many people will ask the question of quotation. In fact, this is very simple. It is the easiest to shop around. As long as you compare services, everyone will be able to know well. Generally, the factors that affect the price are that. For a few reasons, regions (the difference between plains and mountainous areas) are affected by terrain, surveying and mapping areas, and the accuracy of the models produced according to the requirements is different, and the processing cycle will have different effects. Many on the Internet say that the general market price is 20,000-50,000 per square kilometer. No comments, you can go to Zhongwei Space or leave me a message, there will be unexpected surprises.
Drone tilt photography
Tilt photogrammetry technology is to fully perceive complex scenes in a large-scale, high-precision, and high-definition manner. The data results generated by efficient data collection equipment and professional data processing procedures intuitively reflect the appearance, location, height and other attributes of features. Provide a guarantee for the real effect and the accuracy of surveying and mapping.
At the same time, the production efficiency of the model is effectively improved, and the economic cost and time cost of 3D model data collection are greatly reduced.
Tilt photogrammetry technology is a high-tech developed in the field of international surveying, mapping and remote sensing in recent years. By mounting multiple sensors on the same flight platform, images can be collected from different angles such as vertical and tilt at the same time to obtain more complete and accurate information on ground objects. .
The 3D data of oblique photography technology can truly reflect the appearance, position, height and other attributes of features. With the help of drones, image data can be quickly collected to realize fully automated 3D modeling. It has the characteristics of low cost, accurate data acquisition, and flexible and convenient operation. .
Advantages of drone tilt photography technology:
1. It breaks through the limitation that the traditional aerial survey single camera can only obtain the orthophoto from the vertical angle, and can obtain more comprehensive details of the texture of the ground object, and more truly reflect the actual situation of the ground object.
2. The terrain surveying and mapping is carried out by the drone equipped with a tilting camera, and the automatic image matching and modeling system can reduce manual intervention and improve work efficiency.
3. It can greatly shorten the collaborative work in the field of surveying and mapping, save the labor time of the surveying personnel, and reduce the labor intensity of the field.
4. Oblique images can provide users with a wealth of geographic information products, realize two-dimensional and three-dimensional data overlay and display, and provide auxiliary decision-making analysis for related cadastral management information systems.
Drone tilt photography process
Using the real-view three-dimensional acquisition system, aerial photography is used to acquire the original photos within the survey area, combined with the ground image control measurement results, and the air triple encryption is carried out through the processing software to obtain the external orientation elements of each photo.
In order to meet the accuracy requirements of the model, it is necessary to arrange and collect the coordinates of multiple control points around and inside the survey area to form a control network. All aerial survey data are incorporated into the same coordinate system. Doing so can not only improve the measurement accuracy, but also facilitate data comparison.
The route design of oblique photography adopts special route design software to design, and its relative altitude, ground resolution and physical pixel size meet the triangular proportional relationship. Route design generally adopts 70% sideways overlap and 85% course overlap. In actual flight, each camera automatically performs exposure shooting according to the corresponding exposure point coordinates.
UAV tilt photogrammetry can be generated into digital orthophoto (DOM), digital elevation model (DEM), digital surface model (DSM) and other results. Among them, DSM contains rich information, strong intuitiveness, and scalability. And the software supports exporting a variety of 3D data interactive formats (OBJ/FBX/OSGB, etc.). Provide efficient and accurate data for various model applications.
