Each of these two methods of drone inspection has strengths and weaknesses, and we'll discuss them in detail. However, at a higher level, photogrammetry is better at capturing fine details, while LiDAR can provide more accurate measurements of larger areas. Compared to photogrammetry, LiDAR produces scans with greater detail and precision. The fact that it can work well in adverse conditions, such as low light or a lot of vegetation, makes it the ideal system for situations where precision is highly valued.
Photogrammetry can be as accurate as LIDAR capture, and it can be as technical and expensive as you want. A skilled photogrammetrist with the right tools and processes can compare the results of a high-quality LIDAR survey. It just requires a lot of photographs and a lot of processing time. While LIDAR can provide more detail under denser vegetation, both photogrammetry and LIDAR can generate terrain models under sparse vegetation, where the ground is partially visible from the air.
A WingtraOne UAV equipped with a LIDAR sensor can create accurate 3D models with a vertical accuracy of 2 to 3 cm (0.8 to 1.2 inches). While LIDAR can provide more details under denser vegetation, both photogrammetry (lower graphic) and LIDAR (upper graphic) can generate terrain models under sparse vegetation, where the ground is partially visible from the air.
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