One of the main capabilities of Lidar is the ability to map discrete changes with a very high resolution over a large area very quickly. Surface data have a higher sample density. LiDAR provides a much higher surface density compared to other data collection methods, such as photogrammetry. This improves the results of some types of applications, such as the delineation of floodplains.
Topographic LIDAR usually uses a near-infrared laser to map the land, while bathymetric LIDAR uses green light that penetrates the water to also measure the elevations of the seabed and riverbeds. While LiDAR has many advantages, there are some limitations of LiDAR that make it quite difficult to use.