• 2 Nov 2022
      • News,

6 Questions and Answers about mdLiDAR UAV

1. What is the difference between LiDAR and photogrammetry?

The selection of LiDAR or photogrammetric sensors depends on the needs, time, and resources available for surveying projects. For applications such as creating digital twins, surveying lines and strips of land, topography, or monitoring construction sites, UAV mdLiDAR offers some key advantages over photogrammetry.

UAV mdLiDAR can also collect data in significantly less time compared to surveyors using photogrammetry methods. Photogrammetric processing, where software stitches all the images together, can take much longer. With UAV mdLiDAR, you can produce a point cloud shortly after landing and start working with that data almost instantly. The main difference between the two working methods is that LiDAR allows for surveys with absolute precision, even in the presence of vegetation.

The light pulses of LiDAR technology can penetrate vegetation or hidden areas, reach the ground, and acquire highly accurate information. Photogrammetry allows for capturing high-resolution photos but is conditioned, in the detection results, by lighting conditions and the presence of vegetation or other objects that obscure the ground, resulting in fewer points and therefore less accurate models and maps.

2. What can UAV mdLiDAR penetrate?

One of the main advantages of LiDAR drones is their ability to penetrate vegetation and detect points along the ground. UAV mdLiDAR can “see” through vegetation, allowing you to collect much more detailed data.

LiDAR, which stands for Light Detection and Ranging, can map land surfaces in areas with structures, dense vegetation, or other objects that block the “line of sight.”

LiDAR enables industry professionals to create a more accurate image of a worksite, leading to better results and estimates for their clients.

3. What is the accuracy of UAV mdLiDAR?

Overall accuracy depends on various factors, including the characteristics of the LiDAR sensor, field of view, and pulse repetition frequency. However, LiDAR systems can achieve high levels of subcentimeter accuracy.

For example, the mdLidar1000HR with a 90-degree field of view for both scanned points and images repeatedly provides an accuracy of 1.6 cm (0.052 feet) at 1-σ when flying at 40 m (130 feet) with a speed of 8 m/s (18 mph).

4. What are the main uses of drone LiDAR surveying equipment?

There are many applications for drone LiDAR. Some of the most common uses include:

Creating digital twins

  • Surveying lines and strips of land
  • Volume calculations
  • Construction site monitoring (SAL)
  • Environmental changes
  • Forestry
  • Boundary mapping
  • Design, leveling, and excavation
  • Archaeology and cultural heritage
  • Highway design
  • Precision agriculture

UAV mdLiDAR is making a significant impact on specialists in various professions, both in terms of data collection efficiency and the production of geospatial results.

5. How does drone LiDAR save time and money?

UAV mdLiDAR allows you to cover much more ground compared to traditional surveying methods, in a safer and more efficient way.

Additionally, if you need to survey mountainous terrains or other areas that are difficult and dangerous to access on foot, drone LiDAR eliminates the risk and enables the safe acquisition of data. It provides high-quality data in a very short time. Not only does it cover more surface area, but it also allows for the acquisition of much more high-quality data, resulting in more accurate point clouds and surface models compared to conventional methods.

6. Can I afford a drone LiDAR?

Price is often the determining factor when it comes to purchasing a UAV solution. However, if the system purchased cannot produce the required data quality, choosing the lowest price option can end up being the most expensive choice.

We can help you select a system that meets the requirements and needs of your projects by offering favorable purchase terms or alternative purchasing options such as operator rentals.

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