LiDAR can penetrate vegetation, collect data in low-light conditions, and map hundreds of acres in a relatively short amount of time. With capabilities like these, it’s easy to wonder: is there anything LiDAR can’t do? While LiDAR drone surveys offer major advantages for efficient data collection and topographic analysis, there are certain limitations we want teams to be aware of.
Where LiDAR Excels
LiDAR, which stands for Light Detection and Ranging, works by sending thousands of laser pulses toward the ground and measuring how long it takes for those pulses to return. This process creates highly detailed point cloud data that can be used to generate maps, elevations, contours, and 3D models.
LiDAR is especially effective for:
- Topographic mapping
- Construction progress tracking
- Earthwork calculations
- Vegetation penetration
- Stormwater and drainage analysis
- Large-area mapping
One of LiDAR’s biggest advantages is its ability to collect data efficiently across large or difficult-to-access areas. Steep terrain, active construction sites, and remote locations can often be mapped much faster with drone LiDAR than with traditional ground methods alone.
What LiDAR can’t do
Although LiDAR is highly advanced, it still relies on laser pulses interacting with surfaces. Because of this, there are situations where the technology has limitations.
LiDAR Cannot See Through Solid Objects
A common misconception is that LiDAR can “see through” anything. In reality, solid surfaces fully reflect the laser pulse. LiDAR cannot penetrate through brick walls, buildings, or other solid structures.
If an area is physically blocked by a structure, the LiDAR sensor cannot collect information behind it. This means hidden features beneath roofs, inside buildings, or behind walls will not appear in the data.
Water Can Create Challenges
LiDAR also has limitations around water. Deep or highly reflective water surfaces can interfere with the laser return, making it difficult to capture accurate underwater elevations.
While some specialized LiDAR systems are designed for shallow water mapping, standard drone LiDAR systems are generally not intended for mapping beneath deep bodies of water. In many cases, the laser pulse reflects off the water surface before meaningful underwater data can be collected.
Dense Obstructions Still Affect Data Collection
LiDAR performs well in vegetated environments compared to traditional aerial photography, but extremely dense obstructions can still reduce data quality. Thick tree canopies, heavy brush, or complex structures may limit how many laser pulses reach the ground surface.
This does not mean LiDAR is ineffective in these environments — only that certain site conditions may require additional flight planning, supplemental survey methods, or adjusted expectations.
Choosing the Right Tool for the Project
LiDAR is an excellent solution for many mapping and surveying applications, but no single technology works perfectly for every project. In some cases, LiDAR may be paired with traditional surveying, photogrammetry, or other data collection methods to achieve the best results.
Understanding what LiDAR can — and cannot — do helps project teams make better decisions about timelines, budgets, and project expectations.
If you’re considering LiDAR drone mapping for your next project, Summit LiDAR can help determine the right solution for your site conditions and project goals.
